1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #include "ble/le_device_db.h" 63 #endif 64 65 #include <stdarg.h> 66 #include <string.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 98 #endif 99 100 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 101 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 102 #endif 103 104 #define HCI_CONNECTION_TIMEOUT_MS 10000 105 106 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 107 #define HCI_RESET_RESEND_TIMEOUT_MS 200 108 #endif 109 110 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 111 #ifndef GAP_INQUIRY_MAX_NAME_LEN 112 #define GAP_INQUIRY_MAX_NAME_LEN 32 113 #endif 114 115 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 116 #define GAP_INQUIRY_DURATION_MIN 0x01 117 #define GAP_INQUIRY_DURATION_MAX 0x30 118 #define GAP_INQUIRY_STATE_IDLE 0x00 119 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 120 #define GAP_INQUIRY_STATE_ACTIVE 0x81 121 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 122 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 123 124 // GAP Remote Name Request 125 #define GAP_REMOTE_NAME_STATE_IDLE 0 126 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 127 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 128 129 // GAP Pairing 130 #define GAP_PAIRING_STATE_IDLE 0 131 #define GAP_PAIRING_STATE_SEND_PIN 1 132 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 133 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 134 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 135 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 136 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 137 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 138 139 // prototypes 140 #ifdef ENABLE_CLASSIC 141 static void hci_update_scan_enable(void); 142 static void hci_emit_discoverable_enabled(uint8_t enabled); 143 static int hci_local_ssp_activated(void); 144 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 145 static bool hci_ssp_supported(hci_connection_t * connection); 146 static void hci_notify_if_sco_can_send_now(void); 147 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 148 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 149 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 150 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 151 static void hci_connection_timestamp(hci_connection_t *connection); 152 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 153 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 154 #endif 155 156 static int hci_power_control_on(void); 157 static void hci_power_control_off(void); 158 static void hci_state_reset(void); 159 static void hci_emit_transport_packet_sent(void); 160 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 161 static void hci_emit_nr_connections_changed(void); 162 static void hci_emit_hci_open_failed(void); 163 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 164 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 165 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 166 static void hci_run(void); 167 static int hci_is_le_connection(hci_connection_t * connection); 168 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 169 170 #ifdef ENABLE_CLASSIC 171 static int hci_have_usb_transport(void); 172 #endif 173 174 #ifdef ENABLE_BLE 175 #ifdef ENABLE_LE_CENTRAL 176 // called from test/ble_client/advertising_data_parser.c 177 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 178 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 179 static hci_connection_t * gap_get_outgoing_connection(void); 180 #endif 181 #endif 182 183 // the STACK is here 184 #ifndef HAVE_MALLOC 185 static hci_stack_t hci_stack_static; 186 #endif 187 static hci_stack_t * hci_stack = NULL; 188 189 #ifdef ENABLE_CLASSIC 190 // default name 191 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 192 193 // test helper 194 static uint8_t disable_l2cap_timeouts = 0; 195 #endif 196 197 /** 198 * create connection for given address 199 * 200 * @return connection OR NULL, if no memory left 201 */ 202 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 203 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 204 hci_connection_t * conn = btstack_memory_hci_connection_get(); 205 if (!conn) return NULL; 206 bd_addr_copy(conn->address, addr); 207 conn->role = HCI_ROLE_INVALID; 208 conn->address_type = addr_type; 209 conn->con_handle = 0xffff; 210 conn->authentication_flags = AUTH_FLAG_NONE; 211 conn->bonding_flags = 0; 212 conn->requested_security_level = LEVEL_0; 213 #ifdef ENABLE_CLASSIC 214 conn->request_role = HCI_ROLE_INVALID; 215 conn->sniff_subrating_max_latency = 0xffff; 216 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 217 conn->link_key_type = INVALID_LINK_KEY; 218 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 219 btstack_run_loop_set_timer_context(&conn->timeout, conn); 220 hci_connection_timestamp(conn); 221 #endif 222 conn->acl_recombination_length = 0; 223 conn->acl_recombination_pos = 0; 224 conn->num_packets_sent = 0; 225 226 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 227 #ifdef ENABLE_BLE 228 conn->le_phy_update_all_phys = 0xff; 229 #endif 230 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 231 conn->le_max_tx_octets = 27; 232 #endif 233 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 234 return conn; 235 } 236 237 238 /** 239 * get le connection parameter range 240 * 241 * @return le connection parameter range struct 242 */ 243 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 244 *range = hci_stack->le_connection_parameter_range; 245 } 246 247 /** 248 * set le connection parameter range 249 * 250 */ 251 252 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 253 hci_stack->le_connection_parameter_range = *range; 254 } 255 256 /** 257 * @brief Test if connection parameters are inside in existing rage 258 * @param conn_interval_min (unit: 1.25ms) 259 * @param conn_interval_max (unit: 1.25ms) 260 * @param conn_latency 261 * @param supervision_timeout (unit: 10ms) 262 * @returns 1 if included 263 */ 264 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 265 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 266 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 267 268 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 269 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 270 271 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 272 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 273 274 return 1; 275 } 276 277 /** 278 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 279 * @note: default: 1 280 * @param max_peripheral_connections 281 */ 282 #ifdef ENABLE_LE_PERIPHERAL 283 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 284 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 285 } 286 #endif 287 288 /** 289 * get hci connections iterator 290 * 291 * @return hci connections iterator 292 */ 293 294 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 295 btstack_linked_list_iterator_init(it, &hci_stack->connections); 296 } 297 298 /** 299 * get connection for a given handle 300 * 301 * @return connection OR NULL, if not found 302 */ 303 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 304 btstack_linked_list_iterator_t it; 305 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 306 while (btstack_linked_list_iterator_has_next(&it)){ 307 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 308 if ( item->con_handle == con_handle ) { 309 return item; 310 } 311 } 312 return NULL; 313 } 314 315 /** 316 * get connection for given address 317 * 318 * @return connection OR NULL, if not found 319 */ 320 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 321 btstack_linked_list_iterator_t it; 322 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 323 while (btstack_linked_list_iterator_has_next(&it)){ 324 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 325 if (connection->address_type != addr_type) continue; 326 if (memcmp(addr, connection->address, 6) != 0) continue; 327 return connection; 328 } 329 return NULL; 330 } 331 332 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 333 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 334 } 335 336 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 337 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 338 } 339 340 #ifdef ENABLE_CLASSIC 341 342 #ifdef ENABLE_SCO_OVER_HCI 343 static int hci_number_sco_connections(void){ 344 int connections = 0; 345 btstack_linked_list_iterator_t it; 346 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 347 while (btstack_linked_list_iterator_has_next(&it)){ 348 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 349 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 350 connections++; 351 } 352 return connections; 353 } 354 #endif 355 356 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 357 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 358 #ifdef HAVE_EMBEDDED_TICK 359 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 360 // connections might be timed out 361 hci_emit_l2cap_check_timeout(connection); 362 } 363 #else 364 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 365 // connections might be timed out 366 hci_emit_l2cap_check_timeout(connection); 367 } 368 #endif 369 } 370 371 static void hci_connection_timestamp(hci_connection_t *connection){ 372 #ifdef HAVE_EMBEDDED_TICK 373 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 374 #else 375 connection->timestamp = btstack_run_loop_get_time_ms(); 376 #endif 377 } 378 379 /** 380 * add authentication flags and reset timer 381 * @note: assumes classic connection 382 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 383 */ 384 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 385 bd_addr_t addr; 386 reverse_bd_addr(bd_addr, addr); 387 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 388 if (conn) { 389 connectionSetAuthenticationFlags(conn, flags); 390 hci_connection_timestamp(conn); 391 } 392 } 393 394 static bool hci_pairing_active(hci_connection_t * hci_connection){ 395 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 396 } 397 398 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 399 if (hci_pairing_active(hci_connection)) return; 400 if (ssp){ 401 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 402 } else { 403 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 404 } 405 // if we are initiator, we have sent an HCI Authenticate Request 406 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 407 408 // if we are responder, use minimal service security level as required level 409 if (!initiator){ 410 hci_connection->requested_security_level = (gap_security_level_t) btstack_max((uint32_t) hci_connection->requested_security_level, (uint32_t) hci_stack->gap_minimal_service_security_level); 411 } 412 413 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 414 415 uint8_t event[12]; 416 event[0] = GAP_EVENT_PAIRING_STARTED; 417 event[1] = 10; 418 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 419 reverse_bd_addr(hci_connection->address, &event[4]); 420 event[10] = (uint8_t) ssp; 421 event[11] = (uint8_t) initiator; 422 hci_emit_event(event, sizeof(event), 1); 423 } 424 425 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 426 hci_connection->requested_security_level = LEVEL_0; 427 if (!hci_pairing_active(hci_connection)) return; 428 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 429 log_info("pairing complete, status %02x", status); 430 431 uint8_t event[12]; 432 event[0] = GAP_EVENT_PAIRING_COMPLETE; 433 event[1] = 9; 434 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 435 reverse_bd_addr(hci_connection->address, &event[4]); 436 event[10] = status; 437 hci_emit_event(event, sizeof(event), 1); 438 } 439 440 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 441 hci_connection_t * conn = hci_connection_for_handle(handle); 442 if (!conn) return false; 443 return hci_pairing_active(conn); 444 } 445 446 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 447 if (!hci_stack->link_key_db) return; 448 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 449 hci_stack->link_key_db->delete_link_key(addr); 450 } 451 452 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 453 if (!hci_stack->link_key_db) return; 454 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 455 hci_stack->link_key_db->put_link_key(addr, link_key, type); 456 } 457 458 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 459 if (!hci_stack->link_key_db) return false; 460 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 461 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 462 return result; 463 } 464 465 void gap_delete_all_link_keys(void){ 466 bd_addr_t addr; 467 link_key_t link_key; 468 link_key_type_t type; 469 btstack_link_key_iterator_t it; 470 int ok = gap_link_key_iterator_init(&it); 471 if (!ok) { 472 log_error("could not initialize iterator"); 473 return; 474 } 475 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 476 gap_drop_link_key_for_bd_addr(addr); 477 } 478 gap_link_key_iterator_done(&it); 479 } 480 481 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 482 if (!hci_stack->link_key_db) return 0; 483 if (!hci_stack->link_key_db->iterator_init) return 0; 484 return hci_stack->link_key_db->iterator_init(it); 485 } 486 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 487 if (!hci_stack->link_key_db) return 0; 488 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 489 } 490 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 491 if (!hci_stack->link_key_db) return; 492 hci_stack->link_key_db->iterator_done(it); 493 } 494 #endif 495 496 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 497 switch (address_type){ 498 case BD_ADDR_TYPE_LE_PUBLIC: 499 case BD_ADDR_TYPE_LE_RANDOM: 500 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 501 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 502 return true; 503 default: 504 return false; 505 } 506 } 507 508 static int hci_is_le_connection(hci_connection_t * connection){ 509 return hci_is_le_connection_type(connection->address_type); 510 } 511 512 /** 513 * count connections 514 */ 515 static int nr_hci_connections(void){ 516 int count = 0; 517 btstack_linked_item_t *it; 518 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 519 count++; 520 } 521 return count; 522 } 523 524 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 525 526 unsigned int num_packets_sent_classic = 0; 527 unsigned int num_packets_sent_le = 0; 528 529 btstack_linked_item_t *it; 530 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 531 hci_connection_t * connection = (hci_connection_t *) it; 532 if (hci_is_le_connection(connection)){ 533 num_packets_sent_le += connection->num_packets_sent; 534 } 535 if (connection->address_type == BD_ADDR_TYPE_ACL){ 536 num_packets_sent_classic += connection->num_packets_sent; 537 } 538 } 539 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 540 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 541 int free_slots_le = 0; 542 543 if (free_slots_classic < 0){ 544 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 545 return 0; 546 } 547 548 if (hci_stack->le_acl_packets_total_num){ 549 // if we have LE slots, they are used 550 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 551 if (free_slots_le < 0){ 552 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 553 return 0; 554 } 555 } else { 556 // otherwise, classic slots are used for LE, too 557 free_slots_classic -= num_packets_sent_le; 558 if (free_slots_classic < 0){ 559 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 560 return 0; 561 } 562 } 563 564 switch (address_type){ 565 case BD_ADDR_TYPE_UNKNOWN: 566 log_error("hci_number_free_acl_slots: unknown address type"); 567 return 0; 568 569 case BD_ADDR_TYPE_ACL: 570 return free_slots_classic; 571 572 default: 573 if (hci_stack->le_acl_packets_total_num){ 574 return free_slots_le; 575 } 576 return free_slots_classic; 577 } 578 } 579 580 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 581 // get connection type 582 hci_connection_t * connection = hci_connection_for_handle(con_handle); 583 if (!connection){ 584 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 585 return 0; 586 } 587 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 588 } 589 590 #ifdef ENABLE_CLASSIC 591 static int hci_number_free_sco_slots(void){ 592 unsigned int num_sco_packets_sent = 0; 593 btstack_linked_item_t *it; 594 if (hci_stack->synchronous_flow_control_enabled){ 595 // explicit flow control 596 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 597 hci_connection_t * connection = (hci_connection_t *) it; 598 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 599 num_sco_packets_sent += connection->num_packets_sent; 600 } 601 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 602 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 603 return 0; 604 } 605 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 606 } else { 607 // implicit flow control -- TODO 608 int num_ready = 0; 609 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 610 hci_connection_t * connection = (hci_connection_t *) it; 611 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 612 if (connection->sco_tx_ready == 0) continue; 613 num_ready++; 614 } 615 return num_ready; 616 } 617 } 618 #endif 619 620 // only used to send HCI Host Number Completed Packets 621 static int hci_can_send_comand_packet_transport(void){ 622 if (hci_stack->hci_packet_buffer_reserved) return 0; 623 624 // check for async hci transport implementations 625 if (hci_stack->hci_transport->can_send_packet_now){ 626 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 627 return 0; 628 } 629 } 630 return 1; 631 } 632 633 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 634 bool hci_can_send_command_packet_now(void){ 635 if (hci_can_send_comand_packet_transport() == 0) return false; 636 return hci_stack->num_cmd_packets > 0u; 637 } 638 639 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 640 // check for async hci transport implementations 641 if (!hci_stack->hci_transport->can_send_packet_now) return true; 642 return hci_stack->hci_transport->can_send_packet_now(packet_type); 643 } 644 645 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 646 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 647 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 648 } 649 650 bool hci_can_send_acl_le_packet_now(void){ 651 if (hci_stack->hci_packet_buffer_reserved) return false; 652 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 653 } 654 655 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 656 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 657 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 658 } 659 660 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 661 if (hci_stack->hci_packet_buffer_reserved) return false; 662 return hci_can_send_prepared_acl_packet_now(con_handle); 663 } 664 665 #ifdef ENABLE_CLASSIC 666 bool hci_can_send_acl_classic_packet_now(void){ 667 if (hci_stack->hci_packet_buffer_reserved) return false; 668 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 669 } 670 671 bool hci_can_send_prepared_sco_packet_now(void){ 672 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 673 if (hci_have_usb_transport()){ 674 return hci_stack->sco_can_send_now; 675 } else { 676 return hci_number_free_sco_slots() > 0; 677 } 678 } 679 680 bool hci_can_send_sco_packet_now(void){ 681 if (hci_stack->hci_packet_buffer_reserved) return false; 682 return hci_can_send_prepared_sco_packet_now(); 683 } 684 685 void hci_request_sco_can_send_now_event(void){ 686 hci_stack->sco_waiting_for_can_send_now = 1; 687 hci_notify_if_sco_can_send_now(); 688 } 689 #endif 690 691 // used for internal checks in l2cap.c 692 bool hci_is_packet_buffer_reserved(void){ 693 return hci_stack->hci_packet_buffer_reserved; 694 } 695 696 // reserves outgoing packet buffer. @returns 1 if successful 697 bool hci_reserve_packet_buffer(void){ 698 if (hci_stack->hci_packet_buffer_reserved) { 699 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 700 return false; 701 } 702 hci_stack->hci_packet_buffer_reserved = true; 703 return true; 704 } 705 706 void hci_release_packet_buffer(void){ 707 hci_stack->hci_packet_buffer_reserved = false; 708 } 709 710 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 711 static int hci_transport_synchronous(void){ 712 return hci_stack->hci_transport->can_send_packet_now == NULL; 713 } 714 715 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 716 717 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 718 719 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 720 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 721 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 722 max_acl_data_packet_length = hci_stack->le_data_packets_length; 723 } 724 725 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 726 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 727 max_acl_data_packet_length = connection->le_max_tx_octets; 728 } 729 #endif 730 731 log_debug("hci_send_acl_packet_fragments entered"); 732 733 uint8_t status = ERROR_CODE_SUCCESS; 734 // multiple packets could be send on a synchronous HCI transport 735 while (true){ 736 737 log_debug("hci_send_acl_packet_fragments loop entered"); 738 739 // get current data 740 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 741 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 742 bool more_fragments = false; 743 744 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 745 if (current_acl_data_packet_length > max_acl_data_packet_length){ 746 more_fragments = true; 747 current_acl_data_packet_length = max_acl_data_packet_length; 748 } 749 750 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 751 if (acl_header_pos > 0u){ 752 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 753 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 754 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 755 } 756 757 // update header len 758 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 759 760 // count packet 761 connection->num_packets_sent++; 762 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 763 764 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 765 if (more_fragments){ 766 // update start of next fragment to send 767 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 768 } else { 769 // done 770 hci_stack->acl_fragmentation_pos = 0; 771 hci_stack->acl_fragmentation_total_size = 0; 772 } 773 774 // send packet 775 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 776 const int size = current_acl_data_packet_length + 4; 777 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 778 hci_stack->acl_fragmentation_tx_active = 1; 779 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 780 if (err != 0){ 781 // no error from HCI Transport expected 782 status = ERROR_CODE_HARDWARE_FAILURE; 783 } 784 785 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 786 787 // done yet? 788 if (!more_fragments) break; 789 790 // can send more? 791 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 792 } 793 794 log_debug("hci_send_acl_packet_fragments loop over"); 795 796 // release buffer now for synchronous transport 797 if (hci_transport_synchronous()){ 798 hci_stack->acl_fragmentation_tx_active = 0; 799 hci_release_packet_buffer(); 800 hci_emit_transport_packet_sent(); 801 } 802 803 return status; 804 } 805 806 // pre: caller has reserved the packet buffer 807 uint8_t hci_send_acl_packet_buffer(int size){ 808 btstack_assert(hci_stack->hci_packet_buffer_reserved); 809 810 uint8_t * packet = hci_stack->hci_packet_buffer; 811 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 812 813 // check for free places on Bluetooth module 814 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 815 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 816 hci_release_packet_buffer(); 817 hci_emit_transport_packet_sent(); 818 return BTSTACK_ACL_BUFFERS_FULL; 819 } 820 821 hci_connection_t *connection = hci_connection_for_handle( con_handle); 822 if (!connection) { 823 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 824 hci_release_packet_buffer(); 825 hci_emit_transport_packet_sent(); 826 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 827 } 828 829 #ifdef ENABLE_CLASSIC 830 hci_connection_timestamp(connection); 831 #endif 832 833 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 834 835 // setup data 836 hci_stack->acl_fragmentation_total_size = size; 837 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 838 839 return hci_send_acl_packet_fragments(connection); 840 } 841 842 #ifdef ENABLE_CLASSIC 843 // pre: caller has reserved the packet buffer 844 uint8_t hci_send_sco_packet_buffer(int size){ 845 btstack_assert(hci_stack->hci_packet_buffer_reserved); 846 847 uint8_t * packet = hci_stack->hci_packet_buffer; 848 849 // skip checks in loopback mode 850 if (!hci_stack->loopback_mode){ 851 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 852 853 // check for free places on Bluetooth module 854 if (!hci_can_send_prepared_sco_packet_now()) { 855 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 856 hci_release_packet_buffer(); 857 hci_emit_transport_packet_sent(); 858 return BTSTACK_ACL_BUFFERS_FULL; 859 } 860 861 // track send packet in connection struct 862 hci_connection_t *connection = hci_connection_for_handle( con_handle); 863 if (!connection) { 864 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 865 hci_release_packet_buffer(); 866 hci_emit_transport_packet_sent(); 867 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 868 } 869 870 if (hci_have_usb_transport()){ 871 // token used 872 hci_stack->sco_can_send_now = false; 873 } else { 874 if (hci_stack->synchronous_flow_control_enabled){ 875 connection->num_packets_sent++; 876 } else { 877 connection->sco_tx_ready--; 878 } 879 } 880 } 881 882 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 883 884 #ifdef HAVE_SCO_TRANSPORT 885 hci_stack->sco_transport->send_packet(packet, size); 886 hci_release_packet_buffer(); 887 hci_emit_transport_packet_sent(); 888 889 return 0; 890 #else 891 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 892 if (hci_transport_synchronous()){ 893 hci_release_packet_buffer(); 894 hci_emit_transport_packet_sent(); 895 } 896 897 if (err != 0){ 898 return ERROR_CODE_HARDWARE_FAILURE; 899 } 900 return ERROR_CODE_SUCCESS; 901 #endif 902 } 903 #endif 904 905 static void acl_handler(uint8_t *packet, uint16_t size){ 906 907 // get info 908 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 909 hci_connection_t *conn = hci_connection_for_handle(con_handle); 910 uint8_t acl_flags = READ_ACL_FLAGS(packet); 911 uint16_t acl_length = READ_ACL_LENGTH(packet); 912 913 // ignore non-registered handle 914 if (!conn){ 915 log_error("acl_handler called with non-registered handle %u!" , con_handle); 916 return; 917 } 918 919 // assert packet is complete 920 if ((acl_length + 4u) != size){ 921 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 922 return; 923 } 924 925 #ifdef ENABLE_CLASSIC 926 // update idle timestamp 927 hci_connection_timestamp(conn); 928 #endif 929 930 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 931 hci_stack->host_completed_packets = 1; 932 conn->num_packets_completed++; 933 #endif 934 935 // handle different packet types 936 switch (acl_flags & 0x03u) { 937 938 case 0x01: // continuation fragment 939 940 // sanity checks 941 if (conn->acl_recombination_pos == 0u) { 942 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 943 return; 944 } 945 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 946 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 947 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 948 conn->acl_recombination_pos = 0; 949 return; 950 } 951 952 // append fragment payload (header already stored) 953 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 954 &packet[4], acl_length); 955 conn->acl_recombination_pos += acl_length; 956 957 // forward complete L2CAP packet if complete. 958 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 959 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 960 // reset recombination buffer 961 conn->acl_recombination_length = 0; 962 conn->acl_recombination_pos = 0; 963 } 964 break; 965 966 case 0x02: { // first fragment 967 968 // sanity check 969 if (conn->acl_recombination_pos) { 970 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 971 conn->acl_recombination_pos = 0; 972 } 973 974 // peek into L2CAP packet! 975 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 976 977 // compare fragment size to L2CAP packet size 978 if (acl_length >= (l2cap_length + 4u)){ 979 // forward fragment as L2CAP packet 980 hci_emit_acl_packet(packet, acl_length + 4u); 981 } else { 982 983 if (acl_length > HCI_ACL_BUFFER_SIZE){ 984 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 985 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 986 return; 987 } 988 989 // store first fragment and tweak acl length for complete package 990 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 991 packet, acl_length + 4u); 992 conn->acl_recombination_pos = acl_length + 4u; 993 conn->acl_recombination_length = l2cap_length; 994 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 995 } 996 break; 997 998 } 999 default: 1000 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1001 return; 1002 } 1003 1004 // execute main loop 1005 hci_run(); 1006 } 1007 1008 static void hci_shutdown_connection(hci_connection_t *conn){ 1009 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1010 1011 #ifdef ENABLE_CLASSIC 1012 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1013 bd_addr_type_t addr_type = conn->address_type; 1014 #endif 1015 #ifdef HAVE_SCO_TRANSPORT 1016 hci_con_handle_t con_handle = conn->con_handle; 1017 #endif 1018 #endif 1019 1020 btstack_run_loop_remove_timer(&conn->timeout); 1021 1022 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1023 btstack_memory_hci_connection_free( conn ); 1024 1025 // now it's gone 1026 hci_emit_nr_connections_changed(); 1027 1028 #ifdef ENABLE_CLASSIC 1029 #ifdef ENABLE_SCO_OVER_HCI 1030 // update SCO 1031 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1032 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1033 } 1034 #endif 1035 #ifdef HAVE_SCO_TRANSPORT 1036 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1037 hci_stack->sco_transport->close(con_handle); 1038 } 1039 #endif 1040 #endif 1041 } 1042 1043 #ifdef ENABLE_CLASSIC 1044 1045 static const uint16_t packet_type_sizes[] = { 1046 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1047 HCI_ACL_DH1_SIZE, 0, 0, 0, 1048 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1049 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1050 }; 1051 static const uint8_t packet_type_feature_requirement_bit[] = { 1052 0, // 3 slot packets 1053 1, // 5 slot packets 1054 25, // EDR 2 mpbs 1055 26, // EDR 3 mbps 1056 39, // 3 slot EDR packts 1057 40, // 5 slot EDR packet 1058 }; 1059 static const uint16_t packet_type_feature_packet_mask[] = { 1060 0x0f00, // 3 slot packets 1061 0xf000, // 5 slot packets 1062 0x1102, // EDR 2 mpbs 1063 0x2204, // EDR 3 mbps 1064 0x0300, // 3 slot EDR packts 1065 0x3000, // 5 slot EDR packet 1066 }; 1067 1068 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1069 // enable packet types based on size 1070 uint16_t packet_types = 0; 1071 unsigned int i; 1072 for (i=0;i<16;i++){ 1073 if (packet_type_sizes[i] == 0) continue; 1074 if (packet_type_sizes[i] <= buffer_size){ 1075 packet_types |= 1 << i; 1076 } 1077 } 1078 // disable packet types due to missing local supported features 1079 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1080 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1081 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1082 if (feature_set) continue; 1083 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1084 packet_types &= ~packet_type_feature_packet_mask[i]; 1085 } 1086 // flip bits for "may not be used" 1087 packet_types ^= 0x3306; 1088 return packet_types; 1089 } 1090 1091 uint16_t hci_usable_acl_packet_types(void){ 1092 return hci_stack->packet_types; 1093 } 1094 #endif 1095 1096 uint8_t* hci_get_outgoing_packet_buffer(void){ 1097 // hci packet buffer is >= acl data packet length 1098 return hci_stack->hci_packet_buffer; 1099 } 1100 1101 uint16_t hci_max_acl_data_packet_length(void){ 1102 return hci_stack->acl_data_packet_length; 1103 } 1104 1105 #ifdef ENABLE_CLASSIC 1106 bool hci_extended_sco_link_supported(void){ 1107 // No. 31, byte 3, bit 7 1108 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1109 } 1110 #endif 1111 1112 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1113 // No. 54, byte 6, bit 6 1114 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1115 } 1116 1117 static int gap_ssp_supported(void){ 1118 // No. 51, byte 6, bit 3 1119 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1120 } 1121 1122 static int hci_classic_supported(void){ 1123 #ifdef ENABLE_CLASSIC 1124 // No. 37, byte 4, bit 5, = No BR/EDR Support 1125 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1126 #else 1127 return 0; 1128 #endif 1129 } 1130 1131 static int hci_le_supported(void){ 1132 #ifdef ENABLE_BLE 1133 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1134 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1135 #else 1136 return 0; 1137 #endif 1138 } 1139 1140 #ifdef ENABLE_BLE 1141 1142 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1143 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1144 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1145 } else { 1146 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1147 } 1148 } 1149 1150 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1151 *addr_type = hci_stack->le_own_addr_type; 1152 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1153 } 1154 1155 #ifdef ENABLE_LE_PERIPHERAL 1156 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1157 *addr_type = hci_stack->le_advertisements_own_addr_type; 1158 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1159 }; 1160 #endif 1161 1162 #ifdef ENABLE_LE_CENTRAL 1163 1164 /** 1165 * @brief Get own addr type and address used for LE connections (Central) 1166 */ 1167 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1168 *addr_type = hci_stack->le_connection_own_addr_type; 1169 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1170 } 1171 1172 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1173 1174 int offset = 3; 1175 int num_reports = packet[offset]; 1176 offset += 1; 1177 1178 int i; 1179 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1180 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1181 for (i=0; (i<num_reports) && (offset < size);i++){ 1182 // sanity checks on data_length: 1183 uint8_t data_length = packet[offset + 8]; 1184 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1185 if ((offset + 9u + data_length + 1u) > size) return; 1186 // setup event 1187 uint8_t event_size = 10u + data_length; 1188 int pos = 0; 1189 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1190 event[pos++] = event_size; 1191 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1192 offset += 8; 1193 pos += 8; 1194 event[pos++] = packet[offset + 1 + data_length]; // rssi 1195 event[pos++] = data_length; 1196 offset++; 1197 (void)memcpy(&event[pos], &packet[offset], data_length); 1198 pos += data_length; 1199 offset += data_length + 1u; // rssi 1200 hci_emit_event(event, pos, 1); 1201 } 1202 } 1203 #endif 1204 #endif 1205 1206 #ifdef ENABLE_BLE 1207 #ifdef ENABLE_LE_PERIPHERAL 1208 static void hci_update_advertisements_enabled_for_current_roles(void){ 1209 if (hci_stack->le_advertisements_enabled){ 1210 // get number of active le slave connections 1211 int num_slave_connections = 0; 1212 btstack_linked_list_iterator_t it; 1213 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1214 while (btstack_linked_list_iterator_has_next(&it)){ 1215 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1216 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1217 if (con->state != OPEN) continue; 1218 if (con->role != HCI_ROLE_SLAVE) continue; 1219 if (!hci_is_le_connection(con)) continue; 1220 num_slave_connections++; 1221 } 1222 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1223 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1224 } else { 1225 hci_stack->le_advertisements_enabled_for_current_roles = false; 1226 } 1227 } 1228 #endif 1229 #endif 1230 1231 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1232 1233 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1234 if (!hci_stack->config) return 0; 1235 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1236 // Limit baud rate for Broadcom chipsets to 3 mbps 1237 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1238 baud_rate = 3000000; 1239 } 1240 return baud_rate; 1241 } 1242 1243 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1244 UNUSED(ds); 1245 1246 switch (hci_stack->substate){ 1247 case HCI_INIT_W4_SEND_RESET: 1248 log_info("Resend HCI Reset"); 1249 hci_stack->substate = HCI_INIT_SEND_RESET; 1250 hci_stack->num_cmd_packets = 1; 1251 hci_run(); 1252 break; 1253 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1254 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1255 if (hci_stack->hci_transport->reset_link){ 1256 hci_stack->hci_transport->reset_link(); 1257 } 1258 1259 /* fall through */ 1260 1261 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1262 log_info("Resend HCI Reset - CSR Warm Boot"); 1263 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1264 hci_stack->num_cmd_packets = 1; 1265 hci_run(); 1266 break; 1267 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1268 if (hci_stack->hci_transport->set_baudrate){ 1269 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1270 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1271 hci_stack->hci_transport->set_baudrate(baud_rate); 1272 } 1273 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1274 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1275 if (hci_stack->hci_transport->reset_link){ 1276 log_info("Link Reset"); 1277 hci_stack->hci_transport->reset_link(); 1278 } 1279 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1280 hci_run(); 1281 } 1282 break; 1283 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1284 // otherwise continue 1285 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1286 hci_send_cmd(&hci_read_local_supported_commands); 1287 break; 1288 default: 1289 break; 1290 } 1291 } 1292 #endif 1293 1294 static void hci_initializing_next_state(void){ 1295 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1296 } 1297 1298 // assumption: hci_can_send_command_packet_now() == true 1299 static void hci_initializing_run(void){ 1300 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1301 switch (hci_stack->substate){ 1302 case HCI_INIT_SEND_RESET: 1303 hci_state_reset(); 1304 1305 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1306 // prepare reset if command complete not received in 100ms 1307 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1308 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1309 btstack_run_loop_add_timer(&hci_stack->timeout); 1310 #endif 1311 // send command 1312 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1313 hci_send_cmd(&hci_reset); 1314 break; 1315 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1316 hci_send_cmd(&hci_read_local_version_information); 1317 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1318 break; 1319 case HCI_INIT_SEND_READ_LOCAL_NAME: 1320 hci_send_cmd(&hci_read_local_name); 1321 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1322 break; 1323 1324 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1325 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1326 hci_state_reset(); 1327 // prepare reset if command complete not received in 100ms 1328 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1329 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1330 btstack_run_loop_add_timer(&hci_stack->timeout); 1331 // send command 1332 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1333 hci_send_cmd(&hci_reset); 1334 break; 1335 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1336 hci_state_reset(); 1337 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1338 hci_send_cmd(&hci_reset); 1339 break; 1340 case HCI_INIT_SEND_BAUD_CHANGE: { 1341 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1342 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1343 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1344 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1345 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1346 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1347 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1348 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1349 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1350 btstack_run_loop_add_timer(&hci_stack->timeout); 1351 } 1352 break; 1353 } 1354 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1355 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1356 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1357 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1358 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1359 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1360 break; 1361 } 1362 case HCI_INIT_CUSTOM_INIT: 1363 // Custom initialization 1364 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1365 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1366 bool send_cmd = false; 1367 switch (hci_stack->chipset_result){ 1368 case BTSTACK_CHIPSET_VALID_COMMAND: 1369 send_cmd = true; 1370 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1371 break; 1372 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1373 send_cmd = true; 1374 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1375 log_info("CSR Warm Boot"); 1376 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1377 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1378 btstack_run_loop_add_timer(&hci_stack->timeout); 1379 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1380 && hci_stack->config 1381 && hci_stack->chipset 1382 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1383 && hci_stack->hci_transport->set_baudrate 1384 && hci_transport_uart_get_main_baud_rate()){ 1385 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1386 } else { 1387 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1388 } 1389 break; 1390 default: 1391 break; 1392 } 1393 1394 if (send_cmd){ 1395 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1396 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1397 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1398 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1399 break; 1400 } 1401 log_info("Init script done"); 1402 1403 // Init script download on Broadcom chipsets causes: 1404 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1405 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1406 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1407 1408 // - baud rate to reset, restore UART baud rate if needed 1409 int need_baud_change = hci_stack->config 1410 && hci_stack->chipset 1411 && hci_stack->chipset->set_baudrate_command 1412 && hci_stack->hci_transport->set_baudrate 1413 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1414 if (need_baud_change) { 1415 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1416 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1417 hci_stack->hci_transport->set_baudrate(baud_rate); 1418 } 1419 1420 uint16_t bcm_delay_ms = 300; 1421 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1422 // -> Work around: wait here. 1423 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1424 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1425 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1426 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1427 btstack_run_loop_add_timer(&hci_stack->timeout); 1428 break; 1429 } 1430 } 1431 // otherwise continue 1432 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1433 hci_send_cmd(&hci_read_local_supported_commands); 1434 break; 1435 case HCI_INIT_SET_BD_ADDR: 1436 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1437 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1438 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1439 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1440 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1441 break; 1442 #endif 1443 1444 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1445 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1446 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1447 hci_send_cmd(&hci_read_local_supported_commands); 1448 break; 1449 case HCI_INIT_READ_BD_ADDR: 1450 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1451 hci_send_cmd(&hci_read_bd_addr); 1452 break; 1453 case HCI_INIT_READ_BUFFER_SIZE: 1454 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1455 hci_send_cmd(&hci_read_buffer_size); 1456 break; 1457 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1458 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1459 hci_send_cmd(&hci_read_local_supported_features); 1460 break; 1461 1462 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1463 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1464 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1465 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1466 break; 1467 case HCI_INIT_HOST_BUFFER_SIZE: 1468 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1469 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1470 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1471 break; 1472 #endif 1473 1474 case HCI_INIT_SET_EVENT_MASK: 1475 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1476 if (hci_le_supported()){ 1477 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1478 } else { 1479 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1480 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1481 } 1482 break; 1483 1484 #ifdef ENABLE_CLASSIC 1485 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1486 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1487 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1488 break; 1489 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1490 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1491 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1492 break; 1493 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1494 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1495 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1496 break; 1497 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1498 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1499 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1500 break; 1501 case HCI_INIT_WRITE_LOCAL_NAME: { 1502 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1503 hci_reserve_packet_buffer(); 1504 uint8_t * packet = hci_stack->hci_packet_buffer; 1505 // construct HCI Command and send 1506 uint16_t opcode = hci_write_local_name.opcode; 1507 hci_stack->last_cmd_opcode = opcode; 1508 packet[0] = opcode & 0xff; 1509 packet[1] = opcode >> 8; 1510 packet[2] = DEVICE_NAME_LEN; 1511 memset(&packet[3], 0, DEVICE_NAME_LEN); 1512 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1513 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1514 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1515 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1516 // expand '00:00:00:00:00:00' in name with bd_addr 1517 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1518 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1519 break; 1520 } 1521 case HCI_INIT_WRITE_EIR_DATA: { 1522 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1523 hci_reserve_packet_buffer(); 1524 uint8_t * packet = hci_stack->hci_packet_buffer; 1525 // construct HCI Command in-place and send 1526 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1527 hci_stack->last_cmd_opcode = opcode; 1528 uint16_t offset = 0; 1529 packet[offset++] = opcode & 0xff; 1530 packet[offset++] = opcode >> 8; 1531 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1532 packet[offset++] = 0; // FEC not required 1533 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1534 if (hci_stack->eir_data){ 1535 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1536 ad_context_t context; 1537 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1538 uint8_t data_type = ad_iterator_get_data_type(&context); 1539 uint8_t size = ad_iterator_get_data_len(&context); 1540 const uint8_t *data = ad_iterator_get_data(&context); 1541 // copy item 1542 packet[offset++] = size + 1; 1543 packet[offset++] = data_type; 1544 memcpy(&packet[offset], data, size); 1545 // update name item 1546 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1547 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1548 } 1549 offset += size; 1550 } 1551 } else { 1552 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1553 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1554 packet[offset++] = bytes_to_copy + 1; 1555 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1556 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1557 // expand '00:00:00:00:00:00' in name with bd_addr 1558 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1559 } 1560 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1561 break; 1562 } 1563 case HCI_INIT_WRITE_INQUIRY_MODE: 1564 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1565 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1566 break; 1567 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1568 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1569 hci_stack->secure_connections_active = true; 1570 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1571 break; 1572 case HCI_INIT_WRITE_SCAN_ENABLE: 1573 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1574 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1575 break; 1576 // only sent if ENABLE_SCO_OVER_HCI is defined 1577 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1578 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1579 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1580 break; 1581 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1582 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1583 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1584 break; 1585 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1586 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1587 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1588 #ifdef ENABLE_SCO_OVER_HCI 1589 log_info("BCM: Route SCO data via HCI transport"); 1590 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1591 #endif 1592 #ifdef ENABLE_SCO_OVER_PCM 1593 log_info("BCM: Route SCO data via PCM interface"); 1594 #ifdef ENABLE_BCM_PCM_WBS 1595 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1596 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1597 #else 1598 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1599 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1600 #endif 1601 #endif 1602 break; 1603 #ifdef ENABLE_SCO_OVER_PCM 1604 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1605 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1606 log_info("BCM: Config PCM interface for I2S"); 1607 #ifdef ENABLE_BCM_PCM_WBS 1608 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1609 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1610 #else 1611 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1612 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1613 #endif 1614 break; 1615 #endif 1616 #endif 1617 1618 #ifdef ENABLE_BLE 1619 // LE INIT 1620 case HCI_INIT_LE_READ_BUFFER_SIZE: 1621 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1622 hci_send_cmd(&hci_le_read_buffer_size); 1623 break; 1624 case HCI_INIT_LE_SET_EVENT_MASK: 1625 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1626 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1627 break; 1628 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1629 // LE Supported Host = 1, Simultaneous Host = 0 1630 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1631 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1632 break; 1633 #endif 1634 1635 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1636 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1637 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1638 hci_send_cmd(&hci_le_read_maximum_data_length); 1639 break; 1640 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1641 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1642 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1643 break; 1644 #endif 1645 1646 #ifdef ENABLE_LE_CENTRAL 1647 case HCI_INIT_READ_WHITE_LIST_SIZE: 1648 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1649 hci_send_cmd(&hci_le_read_white_list_size); 1650 break; 1651 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1652 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1653 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); 1654 break; 1655 #endif 1656 default: 1657 return; 1658 } 1659 } 1660 1661 static void hci_init_done(void){ 1662 // done. tell the app 1663 log_info("hci_init_done -> HCI_STATE_WORKING"); 1664 hci_stack->state = HCI_STATE_WORKING; 1665 hci_emit_state(); 1666 hci_run(); 1667 } 1668 1669 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1670 bool command_completed = false; 1671 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1672 uint16_t opcode = little_endian_read_16(packet,3); 1673 if (opcode == hci_stack->last_cmd_opcode){ 1674 command_completed = true; 1675 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1676 } else { 1677 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1678 } 1679 } 1680 1681 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1682 uint8_t status = packet[2]; 1683 uint16_t opcode = little_endian_read_16(packet,4); 1684 if (opcode == hci_stack->last_cmd_opcode){ 1685 if (status){ 1686 command_completed = true; 1687 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1688 } else { 1689 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1690 } 1691 } else { 1692 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1693 } 1694 } 1695 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1696 // Vendor == CSR 1697 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1698 // TODO: track actual command 1699 command_completed = true; 1700 } 1701 1702 // Vendor == Toshiba 1703 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1704 // TODO: track actual command 1705 command_completed = true; 1706 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1707 hci_stack->num_cmd_packets = 1; 1708 } 1709 #endif 1710 1711 return command_completed; 1712 } 1713 1714 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1715 1716 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1717 1718 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1719 1720 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1721 1722 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1723 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1724 // 1725 // HCI Reset 1726 // Timeout 100 ms 1727 // HCI Reset 1728 // Command Complete Reset 1729 // HCI Read Local Version Information 1730 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1731 // hang... 1732 // 1733 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1734 if (!command_completed 1735 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1736 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1737 1738 uint16_t opcode = little_endian_read_16(packet,3); 1739 if (opcode == hci_reset.opcode){ 1740 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1741 return; 1742 } 1743 } 1744 1745 // CSR & H5 1746 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1747 if (!command_completed 1748 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1749 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1750 1751 uint16_t opcode = little_endian_read_16(packet,3); 1752 if (opcode == hci_reset.opcode){ 1753 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1754 return; 1755 } 1756 } 1757 1758 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1759 // fix: Correct substate and behave as command below 1760 if (command_completed){ 1761 switch (hci_stack->substate){ 1762 case HCI_INIT_SEND_RESET: 1763 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1764 break; 1765 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1766 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1767 break; 1768 default: 1769 break; 1770 } 1771 } 1772 1773 #endif 1774 1775 if (!command_completed) return; 1776 1777 bool need_baud_change = false; 1778 bool need_addr_change = false; 1779 1780 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1781 need_baud_change = hci_stack->config 1782 && hci_stack->chipset 1783 && hci_stack->chipset->set_baudrate_command 1784 && hci_stack->hci_transport->set_baudrate 1785 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1786 1787 need_addr_change = hci_stack->custom_bd_addr_set 1788 && hci_stack->chipset 1789 && hci_stack->chipset->set_bd_addr_command; 1790 #endif 1791 1792 switch(hci_stack->substate){ 1793 1794 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1795 case HCI_INIT_SEND_RESET: 1796 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1797 // fix: just correct substate and behave as command below 1798 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1799 btstack_run_loop_remove_timer(&hci_stack->timeout); 1800 break; 1801 case HCI_INIT_W4_SEND_RESET: 1802 btstack_run_loop_remove_timer(&hci_stack->timeout); 1803 break; 1804 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1805 log_info("Received local name, need baud change %d", (int) need_baud_change); 1806 if (need_baud_change){ 1807 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1808 return; 1809 } 1810 // skip baud change 1811 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1812 return; 1813 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1814 // for STLC2500D, baud rate change already happened. 1815 // for others, baud rate gets changed now 1816 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1817 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1818 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1819 hci_stack->hci_transport->set_baudrate(baud_rate); 1820 } 1821 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1822 return; 1823 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1824 btstack_run_loop_remove_timer(&hci_stack->timeout); 1825 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1826 return; 1827 case HCI_INIT_W4_CUSTOM_INIT: 1828 // repeat custom init 1829 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1830 return; 1831 #else 1832 case HCI_INIT_W4_SEND_RESET: 1833 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1834 return ; 1835 #endif 1836 1837 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1838 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1839 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1840 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1841 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1842 return; 1843 } 1844 if (need_addr_change){ 1845 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1846 return; 1847 } 1848 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1849 return; 1850 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1851 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1852 if (need_baud_change){ 1853 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1854 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1855 hci_stack->hci_transport->set_baudrate(baud_rate); 1856 } 1857 if (need_addr_change){ 1858 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1859 return; 1860 } 1861 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1862 return; 1863 case HCI_INIT_W4_SET_BD_ADDR: 1864 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1865 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1866 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1867 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1868 return; 1869 } 1870 // skipping st warm boot 1871 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1872 return; 1873 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1874 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1875 return; 1876 #endif 1877 case HCI_INIT_W4_READ_BD_ADDR: 1878 // only read buffer size if supported 1879 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1880 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1881 return; 1882 } 1883 // skipping read buffer size 1884 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1885 return; 1886 case HCI_INIT_W4_SET_EVENT_MASK: 1887 // skip Classic init commands for LE only chipsets 1888 if (!hci_classic_supported()){ 1889 #ifdef ENABLE_BLE 1890 if (hci_le_supported()){ 1891 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1892 return; 1893 } 1894 #endif 1895 log_error("Neither BR/EDR nor LE supported"); 1896 hci_init_done(); 1897 return; 1898 } 1899 if (!gap_ssp_supported()){ 1900 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1901 return; 1902 } 1903 break; 1904 #ifdef ENABLE_BLE 1905 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1906 // skip write le host if not supported (e.g. on LE only EM9301) 1907 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1908 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1909 return; 1910 1911 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1912 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1913 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1914 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1915 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1916 return; 1917 } 1918 // explicit fall through to reduce repetitions 1919 1920 #ifdef ENABLE_LE_CENTRAL 1921 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1922 #else 1923 hci_init_done(); 1924 #endif 1925 return; 1926 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1927 1928 #endif /* ENABLE_BLE */ 1929 1930 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1931 // skip write secure connections host support if not supported or disabled 1932 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1933 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1934 return; 1935 } 1936 break; 1937 1938 #ifdef ENABLE_SCO_OVER_HCI 1939 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1940 // skip write synchronous flow control if not supported 1941 if (hci_stack->local_supported_commands[0] & 0x04) break; 1942 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1943 1944 /* fall through */ 1945 1946 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1947 // skip write default erroneous data reporting if not supported 1948 if (hci_stack->local_supported_commands[0] & 0x08) break; 1949 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1950 1951 /* fall through */ 1952 1953 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1954 // skip bcm set sco pcm config on non-Broadcom chipsets 1955 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1956 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1957 1958 /* fall through */ 1959 1960 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1961 if (!hci_le_supported()){ 1962 // SKIP LE init for Classic only configuration 1963 hci_init_done(); 1964 return; 1965 } 1966 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1967 break; 1968 1969 #else /* !ENABLE_SCO_OVER_HCI */ 1970 1971 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1972 #ifdef ENABLE_SCO_OVER_PCM 1973 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1974 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1975 return; 1976 } 1977 #endif 1978 /* fall through */ 1979 1980 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1981 #ifdef ENABLE_BLE 1982 if (hci_le_supported()){ 1983 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1984 return; 1985 } 1986 #endif 1987 // SKIP LE init for Classic only configuration 1988 hci_init_done(); 1989 return; 1990 #endif /* ENABLE_SCO_OVER_HCI */ 1991 1992 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1993 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1994 // Response to command before init done state -> init done 1995 case (HCI_INIT_DONE-1): 1996 hci_init_done(); 1997 return; 1998 #endif 1999 2000 default: 2001 break; 2002 } 2003 hci_initializing_next_state(); 2004 } 2005 2006 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2007 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2008 bd_addr_t bd_address; 2009 (void)memcpy(&bd_address, conn->address, 6); 2010 2011 #ifdef ENABLE_CLASSIC 2012 // cache needed data 2013 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2014 #endif 2015 2016 // connection failed, remove entry 2017 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2018 btstack_memory_hci_connection_free( conn ); 2019 2020 #ifdef ENABLE_CLASSIC 2021 // notify client if dedicated bonding 2022 if (notify_dedicated_bonding_failed){ 2023 log_info("hci notify_dedicated_bonding_failed"); 2024 hci_emit_dedicated_bonding_result(bd_address, status); 2025 } 2026 2027 // if authentication error, also delete link key 2028 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2029 gap_drop_link_key_for_bd_addr(bd_address); 2030 } 2031 #else 2032 UNUSED(status); 2033 #endif 2034 } 2035 2036 #ifdef ENABLE_CLASSIC 2037 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2038 // SSP Controller 2039 if (features[6] & (1 << 3)){ 2040 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2041 } 2042 // eSCO 2043 if (features[3] & (1<<7)){ 2044 conn->remote_supported_features[0] |= 1; 2045 } 2046 // Extended features 2047 if (features[7] & (1<<7)){ 2048 conn->remote_supported_features[0] |= 2; 2049 } 2050 } 2051 2052 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2053 // SSP Host 2054 if (features[0] & (1 << 0)){ 2055 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2056 } 2057 // SC Host 2058 if (features[0] & (1 << 3)){ 2059 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2060 } 2061 } 2062 2063 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2064 // SC Controller 2065 if (features[1] & (1 << 0)){ 2066 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2067 } 2068 } 2069 2070 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2071 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2072 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2073 if (conn->bonding_flags & BONDING_DEDICATED){ 2074 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2075 } 2076 } 2077 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2078 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2079 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2080 } 2081 2082 #endif 2083 2084 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2085 // handle BT initialization 2086 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2087 hci_initializing_event_handler(packet, size); 2088 } 2089 2090 // help with BT sleep 2091 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2092 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2093 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2094 hci_initializing_next_state(); 2095 } 2096 } 2097 2098 #ifdef ENABLE_CLASSIC 2099 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2100 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2101 conn->encryption_key_size = encryption_key_size; 2102 2103 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2104 conn->requested_security_level = LEVEL_0; 2105 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2106 return; 2107 } 2108 2109 // Request Authentication if not already done 2110 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2111 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2112 } 2113 #endif 2114 2115 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2116 UNUSED(size); 2117 2118 uint16_t manufacturer; 2119 #ifdef ENABLE_CLASSIC 2120 hci_con_handle_t handle; 2121 hci_connection_t * conn; 2122 uint8_t status; 2123 #endif 2124 // get num cmd packets - limit to 1 to reduce complexity 2125 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2126 2127 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2128 switch (opcode){ 2129 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2130 if (packet[5]) break; 2131 // terminate, name 248 chars 2132 packet[6+248] = 0; 2133 log_info("local name: %s", &packet[6]); 2134 break; 2135 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2136 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2137 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2138 uint16_t acl_len = little_endian_read_16(packet, 6); 2139 uint16_t sco_len = packet[8]; 2140 2141 // determine usable ACL/SCO payload size 2142 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2143 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2144 2145 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2146 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2147 2148 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2149 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2150 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2151 } 2152 break; 2153 case HCI_OPCODE_HCI_READ_RSSI: 2154 if (packet[5] == ERROR_CODE_SUCCESS){ 2155 uint8_t event[5]; 2156 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2157 event[1] = 3; 2158 (void)memcpy(&event[2], &packet[6], 3); 2159 hci_emit_event(event, sizeof(event), 1); 2160 } 2161 break; 2162 #ifdef ENABLE_BLE 2163 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2164 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2165 hci_stack->le_acl_packets_total_num = packet[8]; 2166 // determine usable ACL payload size 2167 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2168 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2169 } 2170 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2171 break; 2172 #endif 2173 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2174 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2175 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2176 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2177 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); 2178 break; 2179 #endif 2180 #ifdef ENABLE_LE_CENTRAL 2181 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2182 hci_stack->le_whitelist_capacity = packet[6]; 2183 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2184 break; 2185 #endif 2186 case HCI_OPCODE_HCI_READ_BD_ADDR: 2187 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2188 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)); 2189 #ifdef ENABLE_CLASSIC 2190 if (hci_stack->link_key_db){ 2191 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2192 } 2193 #endif 2194 break; 2195 #ifdef ENABLE_CLASSIC 2196 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2197 hci_emit_discoverable_enabled(hci_stack->discoverable); 2198 break; 2199 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2200 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2201 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2202 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2203 hci_emit_event(event, sizeof(event), 1); 2204 } 2205 break; 2206 #endif 2207 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2208 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2209 2210 #ifdef ENABLE_CLASSIC 2211 // determine usable ACL packet types based on host buffer size and supported features 2212 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2213 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2214 #endif 2215 // Classic/LE 2216 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2217 break; 2218 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2219 manufacturer = little_endian_read_16(packet, 10); 2220 // map Cypress to Broadcom 2221 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2222 log_info("Treat Cypress as Broadcom"); 2223 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2224 little_endian_store_16(packet, 10, manufacturer); 2225 } 2226 hci_stack->manufacturer = manufacturer; 2227 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2228 break; 2229 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2230 hci_stack->local_supported_commands[0] = 2231 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2232 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2233 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2234 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2235 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2236 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2237 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2238 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2239 hci_stack->local_supported_commands[1] = 2240 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2241 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2242 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2243 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2244 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2245 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2246 break; 2247 #ifdef ENABLE_CLASSIC 2248 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2249 if (packet[5]) return; 2250 hci_stack->synchronous_flow_control_enabled = 1; 2251 break; 2252 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2253 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2254 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2255 conn = hci_connection_for_handle(handle); 2256 if (conn != NULL) { 2257 uint8_t key_size = 0; 2258 if (status == 0){ 2259 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2260 log_info("Handle %04x key Size: %u", handle, key_size); 2261 } else { 2262 key_size = 1; 2263 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2264 } 2265 hci_handle_read_encryption_key_size_complete(conn, key_size); 2266 } 2267 break; 2268 // assert pairing complete event is emitted. 2269 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2270 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2271 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2272 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2273 // lookup connection by gap pairing addr 2274 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2275 if (conn == NULL) break; 2276 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2277 break; 2278 2279 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2280 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2281 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2282 uint8_t event[67]; 2283 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2284 event[1] = 65; 2285 (void)memset(&event[2], 0, 65); 2286 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2287 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2288 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2289 event[2] = 3; 2290 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2291 } else { 2292 event[2] = 1; 2293 } 2294 } 2295 hci_emit_event(event, sizeof(event), 0); 2296 break; 2297 } 2298 2299 // note: only needed if user does not provide OOB data 2300 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2301 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2302 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2303 if (conn == NULL) break; 2304 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2305 break; 2306 #endif 2307 #endif 2308 default: 2309 break; 2310 } 2311 } 2312 2313 #ifdef ENABLE_BLE 2314 static void event_handle_le_connection_complete(const uint8_t * packet){ 2315 bd_addr_t addr; 2316 bd_addr_type_t addr_type; 2317 hci_connection_t * conn; 2318 2319 // Connection management 2320 reverse_bd_addr(&packet[8], addr); 2321 addr_type = (bd_addr_type_t)packet[7]; 2322 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2323 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2324 2325 #ifdef ENABLE_LE_CENTRAL 2326 // handle error: error is reported only to the initiator -> outgoing connection 2327 if (packet[3]){ 2328 2329 // handle cancelled outgoing connection 2330 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2331 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2332 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2333 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2334 // reset state 2335 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2336 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2337 // get outgoing connection conn struct for direct connect 2338 conn = gap_get_outgoing_connection(); 2339 } 2340 2341 // outgoing le connection establishment is done 2342 if (conn){ 2343 // remove entry 2344 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2345 btstack_memory_hci_connection_free( conn ); 2346 } 2347 return; 2348 } 2349 #endif 2350 2351 // on success, both hosts receive connection complete event 2352 if (packet[6] == HCI_ROLE_MASTER){ 2353 #ifdef ENABLE_LE_CENTRAL 2354 // if we're master on an le connection, it was an outgoing connection and we're done with it 2355 // note: no hci_connection_t object exists yet for connect with whitelist 2356 if (hci_is_le_connection_type(addr_type)){ 2357 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2358 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2359 } 2360 #endif 2361 } else { 2362 #ifdef ENABLE_LE_PERIPHERAL 2363 // if we're slave, it was an incoming connection, advertisements have stopped 2364 hci_stack->le_advertisements_active = false; 2365 #endif 2366 } 2367 2368 // LE connections are auto-accepted, so just create a connection if there isn't one already 2369 if (!conn){ 2370 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2371 } 2372 2373 // no memory, sorry. 2374 if (!conn){ 2375 return; 2376 } 2377 2378 conn->state = OPEN; 2379 conn->role = packet[6]; 2380 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2381 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2382 2383 #ifdef ENABLE_LE_PERIPHERAL 2384 if (packet[6] == HCI_ROLE_SLAVE){ 2385 hci_update_advertisements_enabled_for_current_roles(); 2386 } 2387 #endif 2388 2389 // init unenhanced att bearer mtu 2390 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2391 conn->att_connection.mtu_exchanged = false; 2392 2393 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2394 2395 // restart timer 2396 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2397 // btstack_run_loop_add_timer(&conn->timeout); 2398 2399 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2400 2401 hci_emit_nr_connections_changed(); 2402 } 2403 #endif 2404 2405 #ifdef ENABLE_CLASSIC 2406 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){ 2407 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2408 // LEVEL_4 is tested by l2cap 2409 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2410 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2411 if (level >= LEVEL_3){ 2412 // MITM not possible without keyboard or display 2413 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2414 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2415 2416 // MITM possible if one side has keyboard and the other has keyboard or display 2417 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2418 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2419 2420 // MITM not possible if one side has only display and other side has no keyboard 2421 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2422 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2423 } 2424 // LEVEL 2 requires SSP, which is a given 2425 return true; 2426 } 2427 2428 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2429 uint16_t i; 2430 for (i=0; i < size ; i++){ 2431 if (data[i] != 0) { 2432 return false; 2433 } 2434 } 2435 return true; 2436 } 2437 2438 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2439 // assess security: LEVEL 4 requires SC 2440 if ((hci_stack->gap_secure_connections_only_mode || (conn->requested_security_level == LEVEL_4)) && !hci_remote_sc_enabled(conn)){ 2441 log_info("Level 4 required, but SC not supported -> abort"); 2442 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2443 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2444 return; 2445 } 2446 2447 // assess security based on io capabilities 2448 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2449 // get requested security level 2450 gap_security_level_t requested_security_level = conn->requested_security_level; 2451 if (hci_stack->gap_secure_connections_only_mode){ 2452 requested_security_level = LEVEL_4; 2453 } 2454 2455 // responder: fully validate io caps of both sides as well as OOB data 2456 bool security_possible = false; 2457 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2458 2459 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2460 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2461 // so we merge the OOB data availability 2462 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2463 if (conn->classic_oob_c_192 != NULL){ 2464 have_oob_data |= 1; 2465 } 2466 if (conn->classic_oob_c_256 != NULL){ 2467 have_oob_data |= 2; 2468 } 2469 // for up to Level 3, either P-192 as well as P-256 will do 2470 // if we don't support SC, then a) conn->classic_oob_c_256 will be NULL and b) remote should not report P-256 available 2471 // if remote does not SC, we should not receive P-256 data either 2472 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2473 security_possible = true; 2474 } 2475 // for Level 4, P-256 is needed 2476 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2477 security_possible = true; 2478 } 2479 #endif 2480 2481 if (security_possible == false){ 2482 log_info("IOCap/OOB insufficient for level %u -> abort", conn->requested_security_level); 2483 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2484 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2485 return; 2486 } 2487 } else { 2488 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2489 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2490 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2491 log_info("Level 3+ required, but no input/output -> abort"); 2492 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2493 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2494 return; 2495 } 2496 #endif 2497 } 2498 2499 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2500 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2501 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2502 } else { 2503 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2504 } 2505 #endif 2506 } 2507 2508 #endif 2509 2510 static void event_handler(uint8_t *packet, uint16_t size){ 2511 2512 uint16_t event_length = packet[1]; 2513 2514 // assert packet is complete 2515 if (size != (event_length + 2u)){ 2516 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2517 return; 2518 } 2519 2520 bd_addr_type_t addr_type; 2521 hci_con_handle_t handle; 2522 hci_connection_t * conn; 2523 int i; 2524 int create_connection_cmd; 2525 2526 #ifdef ENABLE_CLASSIC 2527 hci_link_type_t link_type; 2528 bd_addr_t addr; 2529 #endif 2530 2531 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2532 2533 switch (hci_event_packet_get_type(packet)) { 2534 2535 case HCI_EVENT_COMMAND_COMPLETE: 2536 handle_command_complete_event(packet, size); 2537 break; 2538 2539 case HCI_EVENT_COMMAND_STATUS: 2540 // get num cmd packets - limit to 1 to reduce complexity 2541 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2542 2543 // check command status to detected failed outgoing connections 2544 create_connection_cmd = 0; 2545 #ifdef ENABLE_CLASSIC 2546 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2547 create_connection_cmd = 1; 2548 } 2549 #endif 2550 #ifdef ENABLE_LE_CENTRAL 2551 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2552 create_connection_cmd = 1; 2553 } 2554 #endif 2555 if (create_connection_cmd) { 2556 uint8_t status = hci_event_command_status_get_status(packet); 2557 addr_type = hci_stack->outgoing_addr_type; 2558 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2559 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); 2560 2561 // reset outgoing address info 2562 memset(hci_stack->outgoing_addr, 0, 6); 2563 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2564 2565 // on error 2566 if (status != ERROR_CODE_SUCCESS){ 2567 #ifdef ENABLE_LE_CENTRAL 2568 if (hci_is_le_connection_type(addr_type)){ 2569 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2570 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2571 } 2572 #endif 2573 // error => outgoing connection failed 2574 if (conn != NULL){ 2575 hci_handle_connection_failed(conn, status); 2576 } 2577 } 2578 } 2579 2580 #ifdef ENABLE_CLASSIC 2581 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2582 uint8_t status = hci_event_command_status_get_status(packet); 2583 log_info("command status (inquiry), status %x", status); 2584 if (status == ERROR_CODE_SUCCESS) { 2585 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2586 } else { 2587 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2588 } 2589 } 2590 #endif 2591 break; 2592 2593 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2594 if (size < 3) return; 2595 uint16_t num_handles = packet[2]; 2596 if (size != (3u + num_handles * 4u)) return; 2597 uint16_t offset = 3; 2598 for (i=0; i<num_handles;i++){ 2599 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2600 offset += 2u; 2601 uint16_t num_packets = little_endian_read_16(packet, offset); 2602 offset += 2u; 2603 2604 conn = hci_connection_for_handle(handle); 2605 if (!conn){ 2606 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2607 continue; 2608 } 2609 2610 if (conn->num_packets_sent >= num_packets){ 2611 conn->num_packets_sent -= num_packets; 2612 } else { 2613 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2614 conn->num_packets_sent = 0; 2615 } 2616 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2617 2618 #ifdef ENABLE_CLASSIC 2619 // For SCO, we do the can_send_now_check here 2620 hci_notify_if_sco_can_send_now(); 2621 #endif 2622 } 2623 break; 2624 } 2625 2626 #ifdef ENABLE_CLASSIC 2627 case HCI_EVENT_INQUIRY_COMPLETE: 2628 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2629 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2630 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2631 hci_emit_event(event, sizeof(event), 1); 2632 } 2633 break; 2634 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2635 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2636 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2637 } 2638 break; 2639 case HCI_EVENT_CONNECTION_REQUEST: 2640 reverse_bd_addr(&packet[2], addr); 2641 link_type = (hci_link_type_t) packet[11]; 2642 2643 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2644 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2645 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2646 bd_addr_copy(hci_stack->decline_addr, addr); 2647 break; 2648 } 2649 2650 if (hci_stack->gap_classic_accept_callback != NULL){ 2651 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2652 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2653 bd_addr_copy(hci_stack->decline_addr, addr); 2654 break; 2655 } 2656 } 2657 2658 // TODO: eval COD 8-10 2659 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2660 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2661 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2662 if (!conn) { 2663 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2664 } 2665 if (!conn) { 2666 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2667 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2668 bd_addr_copy(hci_stack->decline_addr, addr); 2669 break; 2670 } 2671 conn->role = HCI_ROLE_SLAVE; 2672 conn->state = RECEIVED_CONNECTION_REQUEST; 2673 // store info about eSCO 2674 if (link_type == HCI_LINK_TYPE_ESCO){ 2675 conn->remote_supported_features[0] |= 1; 2676 } 2677 hci_run(); 2678 break; 2679 2680 case HCI_EVENT_CONNECTION_COMPLETE: 2681 // Connection management 2682 reverse_bd_addr(&packet[5], addr); 2683 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2684 addr_type = BD_ADDR_TYPE_ACL; 2685 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2686 if (conn) { 2687 if (!packet[2]){ 2688 conn->state = OPEN; 2689 conn->con_handle = little_endian_read_16(packet, 3); 2690 2691 // queue get remote feature 2692 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2693 2694 // queue set supervision timeout if we're master 2695 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2696 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2697 } 2698 2699 // restart timer 2700 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2701 btstack_run_loop_add_timer(&conn->timeout); 2702 2703 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2704 2705 hci_emit_nr_connections_changed(); 2706 } else { 2707 // connection failed 2708 hci_handle_connection_failed(conn, packet[2]); 2709 } 2710 } 2711 break; 2712 2713 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2714 reverse_bd_addr(&packet[5], addr); 2715 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2716 if (packet[2]){ 2717 // connection failed 2718 break; 2719 } 2720 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2721 if (!conn) { 2722 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2723 } 2724 if (!conn) { 2725 break; 2726 } 2727 conn->state = OPEN; 2728 conn->con_handle = little_endian_read_16(packet, 3); 2729 2730 #ifdef ENABLE_SCO_OVER_HCI 2731 // update SCO 2732 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2733 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2734 } 2735 // trigger can send now 2736 if (hci_have_usb_transport()){ 2737 hci_stack->sco_can_send_now = true; 2738 } 2739 #endif 2740 #ifdef HAVE_SCO_TRANSPORT 2741 // configure sco transport 2742 if (hci_stack->sco_transport != NULL){ 2743 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2744 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2745 } 2746 #endif 2747 break; 2748 2749 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2750 handle = little_endian_read_16(packet, 3); 2751 conn = hci_connection_for_handle(handle); 2752 if (!conn) break; 2753 if (!packet[2]){ 2754 const uint8_t * features = &packet[5]; 2755 hci_handle_remote_features_page_0(conn, features); 2756 2757 // read extended features if possible 2758 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2759 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2760 break; 2761 } 2762 } 2763 hci_handle_remote_features_received(conn); 2764 break; 2765 2766 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2767 handle = little_endian_read_16(packet, 3); 2768 conn = hci_connection_for_handle(handle); 2769 if (!conn) break; 2770 // status = ok, page = 1 2771 if (!packet[2]) { 2772 uint8_t page_number = packet[5]; 2773 uint8_t maximum_page_number = packet[6]; 2774 const uint8_t * features = &packet[7]; 2775 bool done = false; 2776 switch (page_number){ 2777 case 1: 2778 hci_handle_remote_features_page_1(conn, features); 2779 if (maximum_page_number >= 2){ 2780 // get Secure Connections (Controller) from Page 2 if available 2781 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2782 } else { 2783 // otherwise, assume SC (Controller) == SC (Host) 2784 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2785 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2786 } 2787 done = true; 2788 } 2789 break; 2790 case 2: 2791 hci_handle_remote_features_page_2(conn, features); 2792 done = true; 2793 break; 2794 default: 2795 break; 2796 } 2797 if (!done) break; 2798 } 2799 hci_handle_remote_features_received(conn); 2800 break; 2801 2802 case HCI_EVENT_LINK_KEY_REQUEST: 2803 // request handled by hci_run() 2804 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 2805 break; 2806 2807 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2808 hci_event_link_key_request_get_bd_addr(packet, addr); 2809 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2810 if (!conn) break; 2811 2812 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2813 2814 // CVE-2020-26555: ignore NULL link key 2815 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2816 if (btstack_is_null(&packet[8], 16)) break; 2817 2818 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2819 // Change Connection Encryption keeps link key type 2820 if (link_key_type != CHANGED_COMBINATION_KEY){ 2821 conn->link_key_type = link_key_type; 2822 } 2823 2824 // cache link key. link keys stored in little-endian format for legacy reasons 2825 memcpy(&conn->link_key, &packet[8], 16); 2826 2827 // only store link key: 2828 // - if bondable enabled 2829 if (hci_stack->bondable == false) break; 2830 // - if security level sufficient 2831 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2832 // - for SSP, also check if remote side requested bonding as well 2833 if (conn->link_key_type != COMBINATION_KEY){ 2834 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2835 if (!remote_bonding){ 2836 break; 2837 } 2838 } 2839 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2840 break; 2841 } 2842 2843 case HCI_EVENT_PIN_CODE_REQUEST: 2844 hci_event_pin_code_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 2848 hci_pairing_started(conn, false); 2849 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2850 if (!hci_stack->bondable ){ 2851 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2852 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2853 hci_run(); 2854 return; 2855 } 2856 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2857 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2858 log_info("Level 4 required, but SC not supported -> abort"); 2859 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2860 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2861 hci_run(); 2862 return; 2863 } 2864 break; 2865 2866 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2867 hci_event_io_capability_response_get_bd_addr(packet, addr); 2868 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2869 if (!conn) break; 2870 2871 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2872 hci_pairing_started(conn, true); 2873 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2874 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2875 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2876 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2877 #endif 2878 break; 2879 2880 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2881 hci_event_io_capability_response_get_bd_addr(packet, addr); 2882 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2883 if (!conn) break; 2884 2885 hci_connection_timestamp(conn); 2886 hci_pairing_started(conn, true); 2887 hci_ssp_assess_security_on_io_cap_request(conn); 2888 break; 2889 2890 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2891 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2892 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2893 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2894 if (!conn) break; 2895 2896 hci_connection_timestamp(conn); 2897 2898 hci_pairing_started(conn, true); 2899 2900 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2901 break; 2902 #endif 2903 2904 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2905 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2906 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2907 if (!conn) break; 2908 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2909 if (hci_stack->ssp_auto_accept){ 2910 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2911 }; 2912 } else { 2913 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2914 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2915 // don't forward event to app 2916 hci_run(); 2917 return; 2918 } 2919 break; 2920 2921 case HCI_EVENT_USER_PASSKEY_REQUEST: 2922 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2923 if (hci_stack->ssp_auto_accept){ 2924 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2925 }; 2926 break; 2927 2928 case HCI_EVENT_MODE_CHANGE: 2929 handle = hci_event_mode_change_get_handle(packet); 2930 conn = hci_connection_for_handle(handle); 2931 if (!conn) break; 2932 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2933 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2934 break; 2935 #endif 2936 2937 case HCI_EVENT_ENCRYPTION_CHANGE: 2938 handle = hci_event_encryption_change_get_connection_handle(packet); 2939 conn = hci_connection_for_handle(handle); 2940 if (!conn) break; 2941 if (hci_event_encryption_change_get_status(packet) == 0u) { 2942 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2943 if (encryption_enabled){ 2944 if (hci_is_le_connection(conn)){ 2945 // For LE, we accept connection as encrypted 2946 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2947 } 2948 #ifdef ENABLE_CLASSIC 2949 else { 2950 2951 // dedicated bonding: send result and disconnect 2952 if (conn->bonding_flags & BONDING_DEDICATED){ 2953 conn->bonding_flags &= ~BONDING_DEDICATED; 2954 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2955 conn->bonding_status = packet[2]; 2956 break; 2957 } 2958 2959 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2960 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2961 bool connected_uses_aes_ccm = encryption_enabled == 2; 2962 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2963 log_info("SC during pairing, but only E0 now -> abort"); 2964 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2965 break; 2966 } 2967 2968 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2969 if (connected_uses_aes_ccm){ 2970 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2971 } 2972 2973 #ifdef ENABLE_TESTING_SUPPORT 2974 // work around for issue with PTS dongle 2975 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2976 #endif 2977 2978 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2979 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2980 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2981 } else { 2982 // if not, pretend everything is perfect 2983 hci_handle_read_encryption_key_size_complete(conn, 16); 2984 } 2985 } 2986 #endif 2987 } else { 2988 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 2989 } 2990 } 2991 2992 break; 2993 2994 #ifdef ENABLE_CLASSIC 2995 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2996 handle = hci_event_authentication_complete_get_connection_handle(packet); 2997 conn = hci_connection_for_handle(handle); 2998 if (!conn) break; 2999 3000 // clear authentication active flag 3001 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3002 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3003 3004 // authenticated only if auth status == 0 3005 if (hci_event_authentication_complete_get_status(packet) == 0){ 3006 // authenticated 3007 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3008 3009 // If not already encrypted, start encryption 3010 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3011 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3012 break; 3013 } 3014 } 3015 3016 // emit updated security level 3017 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3018 break; 3019 3020 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3021 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3022 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3023 if (!conn) break; 3024 3025 // treat successfully paired connection as authenticated 3026 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3027 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3028 } 3029 3030 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3031 break; 3032 #endif 3033 3034 // HCI_EVENT_DISCONNECTION_COMPLETE 3035 // has been split, to first notify stack before shutting connection down 3036 // see end of function, too. 3037 case HCI_EVENT_DISCONNECTION_COMPLETE: 3038 if (packet[2]) break; // status != 0 3039 handle = little_endian_read_16(packet, 3); 3040 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3041 if (hci_stack->acl_fragmentation_total_size > 0u) { 3042 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3043 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3044 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3045 hci_stack->acl_fragmentation_total_size = 0; 3046 hci_stack->acl_fragmentation_pos = 0; 3047 if (release_buffer){ 3048 hci_release_packet_buffer(); 3049 } 3050 } 3051 } 3052 3053 conn = hci_connection_for_handle(handle); 3054 if (!conn) break; 3055 #ifdef ENABLE_CLASSIC 3056 // pairing failed if it was ongoing 3057 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3058 #endif 3059 // mark connection for shutdown 3060 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3061 3062 // emit dedicatd bonding event 3063 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3064 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3065 } 3066 3067 #ifdef ENABLE_BLE 3068 #ifdef ENABLE_LE_PERIPHERAL 3069 // re-enable advertisements for le connections if active 3070 if (hci_is_le_connection(conn)){ 3071 hci_update_advertisements_enabled_for_current_roles(); 3072 } 3073 #endif 3074 #endif 3075 break; 3076 3077 case HCI_EVENT_HARDWARE_ERROR: 3078 log_error("Hardware Error: 0x%02x", packet[2]); 3079 if (hci_stack->hardware_error_callback){ 3080 (*hci_stack->hardware_error_callback)(packet[2]); 3081 } else { 3082 // if no special requests, just reboot stack 3083 hci_power_control_off(); 3084 hci_power_control_on(); 3085 } 3086 break; 3087 3088 #ifdef ENABLE_CLASSIC 3089 case HCI_EVENT_ROLE_CHANGE: 3090 if (packet[2]) break; // status != 0 3091 reverse_bd_addr(&packet[3], addr); 3092 addr_type = BD_ADDR_TYPE_ACL; 3093 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3094 if (!conn) break; 3095 conn->role = packet[9]; 3096 break; 3097 #endif 3098 3099 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3100 // release packet buffer only for asynchronous transport and if there are not further fragements 3101 if (hci_transport_synchronous()) { 3102 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3103 return; // instead of break: to avoid re-entering hci_run() 3104 } 3105 hci_stack->acl_fragmentation_tx_active = 0; 3106 if (hci_stack->acl_fragmentation_total_size) break; 3107 hci_release_packet_buffer(); 3108 3109 // L2CAP receives this event via the hci_emit_event below 3110 3111 #ifdef ENABLE_CLASSIC 3112 // For SCO, we do the can_send_now_check here 3113 hci_notify_if_sco_can_send_now(); 3114 #endif 3115 break; 3116 3117 #ifdef ENABLE_CLASSIC 3118 case HCI_EVENT_SCO_CAN_SEND_NOW: 3119 // For SCO, we do the can_send_now_check here 3120 hci_stack->sco_can_send_now = true; 3121 hci_notify_if_sco_can_send_now(); 3122 return; 3123 3124 // explode inquriy results for easier consumption 3125 case HCI_EVENT_INQUIRY_RESULT: 3126 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3127 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3128 gap_inquiry_explode(packet, size); 3129 break; 3130 #endif 3131 3132 #ifdef ENABLE_BLE 3133 case HCI_EVENT_LE_META: 3134 switch (packet[2]){ 3135 #ifdef ENABLE_LE_CENTRAL 3136 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3137 // log_info("advertising report received"); 3138 if (!hci_stack->le_scanning_enabled) break; 3139 le_handle_advertisement_report(packet, size); 3140 break; 3141 #endif 3142 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3143 event_handle_le_connection_complete(packet); 3144 break; 3145 3146 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3147 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3148 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3149 conn = hci_connection_for_handle(handle); 3150 if (!conn) break; 3151 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3152 break; 3153 3154 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3155 // connection 3156 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3157 conn = hci_connection_for_handle(handle); 3158 if (conn) { 3159 // read arguments 3160 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3161 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3162 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3163 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3164 3165 // validate against current connection parameter range 3166 le_connection_parameter_range_t existing_range; 3167 gap_get_connection_parameter_range(&existing_range); 3168 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3169 if (update_parameter){ 3170 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3171 conn->le_conn_interval_min = le_conn_interval_min; 3172 conn->le_conn_interval_max = le_conn_interval_max; 3173 conn->le_conn_latency = le_conn_latency; 3174 conn->le_supervision_timeout = le_supervision_timeout; 3175 } else { 3176 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3177 } 3178 } 3179 break; 3180 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3181 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3182 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3183 conn = hci_connection_for_handle(handle); 3184 if (conn) { 3185 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3186 } 3187 break; 3188 #endif 3189 default: 3190 break; 3191 } 3192 break; 3193 #endif 3194 case HCI_EVENT_VENDOR_SPECIFIC: 3195 // Vendor specific commands often create vendor specific event instead of num completed packets 3196 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3197 switch (hci_stack->manufacturer){ 3198 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3199 hci_stack->num_cmd_packets = 1; 3200 break; 3201 default: 3202 break; 3203 } 3204 break; 3205 default: 3206 break; 3207 } 3208 3209 handle_event_for_current_stack_state(packet, size); 3210 3211 // notify upper stack 3212 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3213 3214 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3215 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3216 handle = little_endian_read_16(packet, 3); 3217 hci_connection_t * aConn = hci_connection_for_handle(handle); 3218 // discard connection if app did not trigger a reconnect in the event handler 3219 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3220 hci_shutdown_connection(aConn); 3221 } 3222 } 3223 3224 // execute main loop 3225 hci_run(); 3226 } 3227 3228 #ifdef ENABLE_CLASSIC 3229 3230 #ifdef ENABLE_SCO_OVER_HCI 3231 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3232 static void sco_schedule_tx(hci_connection_t * conn); 3233 3234 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3235 log_debug("SCO TX Timeout"); 3236 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3237 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3238 if (!conn) return; 3239 3240 // trigger send 3241 conn->sco_tx_ready = 1; 3242 // extra packet if CVSD but SCO buffer is too short 3243 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3244 conn->sco_tx_ready++; 3245 } 3246 hci_notify_if_sco_can_send_now(); 3247 } 3248 3249 3250 #define SCO_TX_AFTER_RX_MS (6) 3251 3252 static void sco_schedule_tx(hci_connection_t * conn){ 3253 3254 uint32_t now = btstack_run_loop_get_time_ms(); 3255 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3256 int time_delta_ms = sco_tx_ms - now; 3257 3258 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3259 3260 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3261 btstack_run_loop_remove_timer(timer); 3262 btstack_run_loop_set_timer(timer, time_delta_ms); 3263 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3264 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3265 btstack_run_loop_add_timer(timer); 3266 } 3267 #endif 3268 3269 static void sco_handler(uint8_t * packet, uint16_t size){ 3270 // lookup connection struct 3271 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3272 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3273 if (!conn) return; 3274 3275 #ifdef ENABLE_SCO_OVER_HCI 3276 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3277 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3278 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3279 packet[2] = 0x3c; 3280 memmove(&packet[3], &packet[23], 63); 3281 size = 63; 3282 } 3283 } 3284 3285 if (hci_have_usb_transport()){ 3286 // Nothing to do 3287 } else { 3288 // 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); 3289 if (hci_stack->synchronous_flow_control_enabled == 0){ 3290 uint32_t now = btstack_run_loop_get_time_ms(); 3291 3292 if (!conn->sco_rx_valid){ 3293 // ignore first 10 packets 3294 conn->sco_rx_count++; 3295 // log_debug("sco rx count %u", conn->sco_rx_count); 3296 if (conn->sco_rx_count == 10) { 3297 // use first timestamp as is and pretent it just started 3298 conn->sco_rx_ms = now; 3299 conn->sco_rx_valid = 1; 3300 conn->sco_rx_count = 0; 3301 sco_schedule_tx(conn); 3302 } 3303 } else { 3304 // track expected arrival timme 3305 conn->sco_rx_count++; 3306 conn->sco_rx_ms += 7; 3307 int delta = (int32_t) (now - conn->sco_rx_ms); 3308 if (delta > 0){ 3309 conn->sco_rx_ms++; 3310 } 3311 // log_debug("sco rx %u", conn->sco_rx_ms); 3312 sco_schedule_tx(conn); 3313 } 3314 } 3315 } 3316 #endif 3317 3318 // deliver to app 3319 if (hci_stack->sco_packet_handler) { 3320 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3321 } 3322 3323 #ifdef HAVE_SCO_TRANSPORT 3324 // We can send one packet for each received packet 3325 conn->sco_tx_ready++; 3326 hci_notify_if_sco_can_send_now(); 3327 #endif 3328 3329 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3330 conn->num_packets_completed++; 3331 hci_stack->host_completed_packets = 1; 3332 hci_run(); 3333 #endif 3334 } 3335 #endif 3336 3337 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3338 hci_dump_packet(packet_type, 1, packet, size); 3339 switch (packet_type) { 3340 case HCI_EVENT_PACKET: 3341 event_handler(packet, size); 3342 break; 3343 case HCI_ACL_DATA_PACKET: 3344 acl_handler(packet, size); 3345 break; 3346 #ifdef ENABLE_CLASSIC 3347 case HCI_SCO_DATA_PACKET: 3348 sco_handler(packet, size); 3349 break; 3350 #endif 3351 default: 3352 break; 3353 } 3354 } 3355 3356 /** 3357 * @brief Add event packet handler. 3358 */ 3359 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3360 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3361 } 3362 3363 3364 /** Register HCI packet handlers */ 3365 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3366 hci_stack->acl_packet_handler = handler; 3367 } 3368 3369 #ifdef ENABLE_CLASSIC 3370 /** 3371 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3372 */ 3373 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3374 hci_stack->sco_packet_handler = handler; 3375 } 3376 #endif 3377 3378 static void hci_state_reset(void){ 3379 // no connections yet 3380 hci_stack->connections = NULL; 3381 3382 // keep discoverable/connectable as this has been requested by the client(s) 3383 // hci_stack->discoverable = 0; 3384 // hci_stack->connectable = 0; 3385 // hci_stack->bondable = 1; 3386 // hci_stack->own_addr_type = 0; 3387 3388 // buffer is free 3389 hci_stack->hci_packet_buffer_reserved = false; 3390 3391 // no pending cmds 3392 hci_stack->decline_reason = 0; 3393 hci_stack->new_scan_enable_value = 0xff; 3394 3395 hci_stack->secure_connections_active = false; 3396 3397 #ifdef ENABLE_CLASSIC 3398 hci_stack->new_page_scan_interval = 0xffff; 3399 hci_stack->new_page_scan_window = 0xffff; 3400 hci_stack->new_page_scan_type = 0xff; 3401 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3402 #endif 3403 3404 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3405 hci_stack->classic_read_local_oob_data = true; 3406 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3407 #endif 3408 3409 // LE 3410 #ifdef ENABLE_BLE 3411 memset(hci_stack->le_random_address, 0, 6); 3412 hci_stack->le_random_address_set = 0; 3413 #endif 3414 #ifdef ENABLE_LE_CENTRAL 3415 hci_stack->le_scanning_active = false; 3416 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3417 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3418 hci_stack->le_whitelist_capacity = 0; 3419 #endif 3420 #ifdef ENABLE_LE_PERIPHERAL 3421 hci_stack->le_advertisements_active = false; 3422 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3423 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3424 } 3425 if (hci_stack->le_advertisements_data != NULL){ 3426 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3427 } 3428 #endif 3429 } 3430 3431 #ifdef ENABLE_CLASSIC 3432 /** 3433 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3434 */ 3435 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3436 // store and open remote device db 3437 hci_stack->link_key_db = link_key_db; 3438 if (hci_stack->link_key_db) { 3439 hci_stack->link_key_db->open(); 3440 } 3441 } 3442 #endif 3443 3444 void hci_init(const hci_transport_t *transport, const void *config){ 3445 3446 #ifdef HAVE_MALLOC 3447 if (!hci_stack) { 3448 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3449 } 3450 #else 3451 hci_stack = &hci_stack_static; 3452 #endif 3453 memset(hci_stack, 0, sizeof(hci_stack_t)); 3454 3455 // reference to use transport layer implementation 3456 hci_stack->hci_transport = transport; 3457 3458 // reference to used config 3459 hci_stack->config = config; 3460 3461 // setup pointer for outgoing packet buffer 3462 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3463 3464 // max acl payload size defined in config.h 3465 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3466 3467 // register packet handlers with transport 3468 transport->register_packet_handler(&packet_handler); 3469 3470 hci_stack->state = HCI_STATE_OFF; 3471 3472 // class of device 3473 hci_stack->class_of_device = 0x007a020c; // Smartphone 3474 3475 // bondable by default 3476 hci_stack->bondable = 1; 3477 3478 #ifdef ENABLE_CLASSIC 3479 // classic name 3480 hci_stack->local_name = default_classic_name; 3481 3482 // Master slave policy 3483 hci_stack->master_slave_policy = 1; 3484 3485 // Allow Role Switch 3486 hci_stack->allow_role_switch = 1; 3487 3488 // Default / minimum security level = 2 3489 hci_stack->gap_security_level = LEVEL_2; 3490 3491 // Default Security Mode 4 3492 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3493 3494 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3495 hci_stack->gap_required_encyrption_key_size = 7; 3496 3497 // Link Supervision Timeout 3498 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3499 3500 #endif 3501 3502 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3503 hci_stack->ssp_enable = 1; 3504 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3505 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3506 hci_stack->ssp_auto_accept = 1; 3507 3508 // Secure Connections: enable (requires support from Controller) 3509 hci_stack->secure_connections_enable = true; 3510 3511 // voice setting - signed 16 bit pcm data with CVSD over the air 3512 hci_stack->sco_voice_setting = 0x60; 3513 3514 #ifdef ENABLE_LE_CENTRAL 3515 // connection parameter to use for outgoing connections 3516 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3517 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3518 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3519 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3520 hci_stack->le_connection_latency = 4; // 4 3521 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3522 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3523 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3524 3525 // default LE Scanning 3526 hci_stack->le_scan_type = 0x1; // active 3527 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3528 hci_stack->le_scan_window = 0x30; // 30 ms 3529 #endif 3530 3531 #ifdef ENABLE_LE_PERIPHERAL 3532 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3533 #endif 3534 3535 // connection parameter range used to answer connection parameter update requests in l2cap 3536 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3537 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3538 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3539 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3540 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3541 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3542 3543 hci_state_reset(); 3544 } 3545 3546 void hci_deinit(void){ 3547 #ifdef HAVE_MALLOC 3548 if (hci_stack) { 3549 free(hci_stack); 3550 } 3551 #endif 3552 hci_stack = NULL; 3553 3554 #ifdef ENABLE_CLASSIC 3555 disable_l2cap_timeouts = 0; 3556 #endif 3557 } 3558 3559 /** 3560 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3561 */ 3562 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3563 hci_stack->chipset = chipset_driver; 3564 3565 // reset chipset driver - init is also called on power_up 3566 if (hci_stack->chipset && hci_stack->chipset->init){ 3567 hci_stack->chipset->init(hci_stack->config); 3568 } 3569 } 3570 3571 /** 3572 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3573 */ 3574 void hci_set_control(const btstack_control_t *hardware_control){ 3575 // references to used control implementation 3576 hci_stack->control = hardware_control; 3577 // init with transport config 3578 hardware_control->init(hci_stack->config); 3579 } 3580 3581 void hci_close(void){ 3582 3583 #ifdef ENABLE_CLASSIC 3584 // close remote device db 3585 if (hci_stack->link_key_db) { 3586 hci_stack->link_key_db->close(); 3587 } 3588 #endif 3589 3590 btstack_linked_list_iterator_t lit; 3591 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3592 while (btstack_linked_list_iterator_has_next(&lit)){ 3593 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3594 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3595 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3596 hci_shutdown_connection(connection); 3597 } 3598 3599 hci_power_control(HCI_POWER_OFF); 3600 3601 #ifdef HAVE_MALLOC 3602 free(hci_stack); 3603 #endif 3604 hci_stack = NULL; 3605 } 3606 3607 #ifdef HAVE_SCO_TRANSPORT 3608 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3609 hci_stack->sco_transport = sco_transport; 3610 sco_transport->register_packet_handler(&packet_handler); 3611 } 3612 #endif 3613 3614 #ifdef ENABLE_CLASSIC 3615 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3616 // validate ranage and set 3617 if (encryption_key_size < 7) return; 3618 if (encryption_key_size > 16) return; 3619 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3620 } 3621 3622 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3623 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3624 hci_stack->gap_security_mode = security_mode; 3625 return ERROR_CODE_SUCCESS; 3626 } else { 3627 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3628 } 3629 } 3630 3631 gap_security_mode_t gap_get_security_mode(void){ 3632 return hci_stack->gap_security_mode; 3633 } 3634 3635 void gap_set_security_level(gap_security_level_t security_level){ 3636 hci_stack->gap_security_level = security_level; 3637 } 3638 3639 gap_security_level_t gap_get_security_level(void){ 3640 if (hci_stack->gap_secure_connections_only_mode){ 3641 return LEVEL_4; 3642 } 3643 return hci_stack->gap_security_level; 3644 } 3645 3646 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3647 hci_stack->gap_minimal_service_security_level = security_level; 3648 } 3649 3650 void gap_set_secure_connections_only_mode(bool enable){ 3651 hci_stack->gap_secure_connections_only_mode = enable; 3652 } 3653 3654 bool gap_get_secure_connections_only_mode(void){ 3655 return hci_stack->gap_secure_connections_only_mode; 3656 } 3657 #endif 3658 3659 #ifdef ENABLE_CLASSIC 3660 void gap_set_class_of_device(uint32_t class_of_device){ 3661 hci_stack->class_of_device = class_of_device; 3662 } 3663 3664 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3665 hci_stack->default_link_policy_settings = default_link_policy_settings; 3666 } 3667 3668 void gap_set_allow_role_switch(bool allow_role_switch){ 3669 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3670 } 3671 3672 uint8_t hci_get_allow_role_switch(void){ 3673 return hci_stack->allow_role_switch; 3674 } 3675 3676 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3677 hci_stack->link_supervision_timeout = link_supervision_timeout; 3678 } 3679 3680 void hci_disable_l2cap_timeout_check(void){ 3681 disable_l2cap_timeouts = 1; 3682 } 3683 #endif 3684 3685 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3686 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3687 void hci_set_bd_addr(bd_addr_t addr){ 3688 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3689 hci_stack->custom_bd_addr_set = 1; 3690 } 3691 #endif 3692 3693 // State-Module-Driver overview 3694 // state module low-level 3695 // HCI_STATE_OFF off close 3696 // HCI_STATE_INITIALIZING, on open 3697 // HCI_STATE_WORKING, on open 3698 // HCI_STATE_HALTING, on open 3699 // HCI_STATE_SLEEPING, off/sleep close 3700 // HCI_STATE_FALLING_ASLEEP on open 3701 3702 static int hci_power_control_on(void){ 3703 3704 // power on 3705 int err = 0; 3706 if (hci_stack->control && hci_stack->control->on){ 3707 err = (*hci_stack->control->on)(); 3708 } 3709 if (err){ 3710 log_error( "POWER_ON failed"); 3711 hci_emit_hci_open_failed(); 3712 return err; 3713 } 3714 3715 // int chipset driver 3716 if (hci_stack->chipset && hci_stack->chipset->init){ 3717 hci_stack->chipset->init(hci_stack->config); 3718 } 3719 3720 // init transport 3721 if (hci_stack->hci_transport->init){ 3722 hci_stack->hci_transport->init(hci_stack->config); 3723 } 3724 3725 // open transport 3726 err = hci_stack->hci_transport->open(); 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 return 0; 3736 } 3737 3738 static void hci_power_control_off(void){ 3739 3740 log_info("hci_power_control_off"); 3741 3742 // close low-level device 3743 hci_stack->hci_transport->close(); 3744 3745 log_info("hci_power_control_off - hci_transport closed"); 3746 3747 // power off 3748 if (hci_stack->control && hci_stack->control->off){ 3749 (*hci_stack->control->off)(); 3750 } 3751 3752 log_info("hci_power_control_off - control closed"); 3753 3754 hci_stack->state = HCI_STATE_OFF; 3755 } 3756 3757 static void hci_power_control_sleep(void){ 3758 3759 log_info("hci_power_control_sleep"); 3760 3761 #if 0 3762 // don't close serial port during sleep 3763 3764 // close low-level device 3765 hci_stack->hci_transport->close(hci_stack->config); 3766 #endif 3767 3768 // sleep mode 3769 if (hci_stack->control && hci_stack->control->sleep){ 3770 (*hci_stack->control->sleep)(); 3771 } 3772 3773 hci_stack->state = HCI_STATE_SLEEPING; 3774 } 3775 3776 static int hci_power_control_wake(void){ 3777 3778 log_info("hci_power_control_wake"); 3779 3780 // wake on 3781 if (hci_stack->control && hci_stack->control->wake){ 3782 (*hci_stack->control->wake)(); 3783 } 3784 3785 #if 0 3786 // open low-level device 3787 int err = hci_stack->hci_transport->open(hci_stack->config); 3788 if (err){ 3789 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3790 if (hci_stack->control && hci_stack->control->off){ 3791 (*hci_stack->control->off)(); 3792 } 3793 hci_emit_hci_open_failed(); 3794 return err; 3795 } 3796 #endif 3797 3798 return 0; 3799 } 3800 3801 static void hci_power_transition_to_initializing(void){ 3802 // set up state machine 3803 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3804 hci_stack->hci_packet_buffer_reserved = false; 3805 hci_stack->state = HCI_STATE_INITIALIZING; 3806 hci_stack->substate = HCI_INIT_SEND_RESET; 3807 } 3808 3809 // returns error 3810 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3811 int err; 3812 switch (power_mode){ 3813 case HCI_POWER_ON: 3814 err = hci_power_control_on(); 3815 if (err != 0) { 3816 log_error("hci_power_control_on() error %d", err); 3817 return err; 3818 } 3819 hci_power_transition_to_initializing(); 3820 break; 3821 case HCI_POWER_OFF: 3822 // do nothing 3823 break; 3824 case HCI_POWER_SLEEP: 3825 // do nothing (with SLEEP == OFF) 3826 break; 3827 default: 3828 btstack_assert(false); 3829 break; 3830 } 3831 return ERROR_CODE_SUCCESS; 3832 } 3833 3834 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3835 switch (power_mode){ 3836 case HCI_POWER_ON: 3837 // do nothing 3838 break; 3839 case HCI_POWER_OFF: 3840 // no connections yet, just turn it off 3841 hci_power_control_off(); 3842 break; 3843 case HCI_POWER_SLEEP: 3844 // no connections yet, just turn it off 3845 hci_power_control_sleep(); 3846 break; 3847 default: 3848 btstack_assert(false); 3849 break; 3850 } 3851 return ERROR_CODE_SUCCESS; 3852 } 3853 3854 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3855 switch (power_mode){ 3856 case HCI_POWER_ON: 3857 // do nothing 3858 break; 3859 case HCI_POWER_OFF: 3860 // see hci_run 3861 hci_stack->state = HCI_STATE_HALTING; 3862 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3863 break; 3864 case HCI_POWER_SLEEP: 3865 // see hci_run 3866 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3867 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3868 break; 3869 default: 3870 btstack_assert(false); 3871 break; 3872 } 3873 return ERROR_CODE_SUCCESS; 3874 } 3875 3876 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3877 switch (power_mode){ 3878 case HCI_POWER_ON: 3879 hci_power_transition_to_initializing(); 3880 break; 3881 case HCI_POWER_OFF: 3882 // do nothing 3883 break; 3884 case HCI_POWER_SLEEP: 3885 // see hci_run 3886 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3887 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3888 break; 3889 default: 3890 btstack_assert(false); 3891 break; 3892 } 3893 return ERROR_CODE_SUCCESS; 3894 } 3895 3896 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3897 switch (power_mode){ 3898 case HCI_POWER_ON: 3899 3900 #ifdef HAVE_PLATFORM_IPHONE_OS 3901 // nothing to do, if H4 supports power management 3902 if (btstack_control_iphone_power_management_enabled()){ 3903 hci_stack->state = HCI_STATE_INITIALIZING; 3904 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3905 break; 3906 } 3907 #endif 3908 hci_power_transition_to_initializing(); 3909 break; 3910 case HCI_POWER_OFF: 3911 // see hci_run 3912 hci_stack->state = HCI_STATE_HALTING; 3913 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3914 break; 3915 case HCI_POWER_SLEEP: 3916 // do nothing 3917 break; 3918 default: 3919 btstack_assert(false); 3920 break; 3921 } 3922 return ERROR_CODE_SUCCESS; 3923 } 3924 3925 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3926 int err; 3927 switch (power_mode){ 3928 case HCI_POWER_ON: 3929 #ifdef HAVE_PLATFORM_IPHONE_OS 3930 // nothing to do, if H4 supports power management 3931 if (btstack_control_iphone_power_management_enabled()){ 3932 hci_stack->state = HCI_STATE_INITIALIZING; 3933 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3934 hci_update_scan_enable(); 3935 break; 3936 } 3937 #endif 3938 err = hci_power_control_wake(); 3939 if (err) return err; 3940 hci_power_transition_to_initializing(); 3941 break; 3942 case HCI_POWER_OFF: 3943 hci_stack->state = HCI_STATE_HALTING; 3944 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3945 break; 3946 case HCI_POWER_SLEEP: 3947 // do nothing 3948 break; 3949 default: 3950 btstack_assert(false); 3951 break; 3952 } 3953 return ERROR_CODE_SUCCESS; 3954 } 3955 3956 int hci_power_control(HCI_POWER_MODE power_mode){ 3957 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3958 int err = 0; 3959 switch (hci_stack->state){ 3960 case HCI_STATE_OFF: 3961 err = hci_power_control_state_off(power_mode); 3962 break; 3963 case HCI_STATE_INITIALIZING: 3964 err = hci_power_control_state_initializing(power_mode); 3965 break; 3966 case HCI_STATE_WORKING: 3967 err = hci_power_control_state_working(power_mode); 3968 break; 3969 case HCI_STATE_HALTING: 3970 err = hci_power_control_state_halting(power_mode); 3971 break; 3972 case HCI_STATE_FALLING_ASLEEP: 3973 err = hci_power_control_state_falling_asleep(power_mode); 3974 break; 3975 case HCI_STATE_SLEEPING: 3976 err = hci_power_control_state_sleeping(power_mode); 3977 break; 3978 default: 3979 btstack_assert(false); 3980 break; 3981 } 3982 if (err != 0){ 3983 return err; 3984 } 3985 3986 // create internal event 3987 hci_emit_state(); 3988 3989 // trigger next/first action 3990 hci_run(); 3991 3992 return 0; 3993 } 3994 3995 3996 #ifdef ENABLE_CLASSIC 3997 3998 static void hci_update_scan_enable(void){ 3999 // 2 = page scan, 1 = inq scan 4000 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4001 hci_run(); 4002 } 4003 4004 void gap_discoverable_control(uint8_t enable){ 4005 if (enable) enable = 1; // normalize argument 4006 4007 if (hci_stack->discoverable == enable){ 4008 hci_emit_discoverable_enabled(hci_stack->discoverable); 4009 return; 4010 } 4011 4012 hci_stack->discoverable = enable; 4013 hci_update_scan_enable(); 4014 } 4015 4016 void gap_connectable_control(uint8_t enable){ 4017 if (enable) enable = 1; // normalize argument 4018 4019 // don't emit event 4020 if (hci_stack->connectable == enable) return; 4021 4022 hci_stack->connectable = enable; 4023 hci_update_scan_enable(); 4024 } 4025 #endif 4026 4027 void gap_local_bd_addr(bd_addr_t address_buffer){ 4028 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4029 } 4030 4031 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4032 static void hci_host_num_completed_packets(void){ 4033 4034 // create packet manually as arrays are not supported and num_commands should not get reduced 4035 hci_reserve_packet_buffer(); 4036 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4037 4038 uint16_t size = 0; 4039 uint16_t num_handles = 0; 4040 packet[size++] = 0x35; 4041 packet[size++] = 0x0c; 4042 size++; // skip param len 4043 size++; // skip num handles 4044 4045 // add { handle, packets } entries 4046 btstack_linked_item_t * it; 4047 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4048 hci_connection_t * connection = (hci_connection_t *) it; 4049 if (connection->num_packets_completed){ 4050 little_endian_store_16(packet, size, connection->con_handle); 4051 size += 2; 4052 little_endian_store_16(packet, size, connection->num_packets_completed); 4053 size += 2; 4054 // 4055 num_handles++; 4056 connection->num_packets_completed = 0; 4057 } 4058 } 4059 4060 packet[2] = size - 3; 4061 packet[3] = num_handles; 4062 4063 hci_stack->host_completed_packets = 0; 4064 4065 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4066 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4067 4068 // release packet buffer for synchronous transport implementations 4069 if (hci_transport_synchronous()){ 4070 hci_release_packet_buffer(); 4071 hci_emit_transport_packet_sent(); 4072 } 4073 } 4074 #endif 4075 4076 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4077 UNUSED(ds); 4078 hci_stack->substate = HCI_HALTING_CLOSE; 4079 // allow packet handlers to defer final shutdown 4080 hci_emit_state(); 4081 hci_run(); 4082 } 4083 4084 static bool hci_run_acl_fragments(void){ 4085 if (hci_stack->acl_fragmentation_total_size > 0u) { 4086 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4087 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4088 if (connection) { 4089 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4090 hci_send_acl_packet_fragments(connection); 4091 return true; 4092 } 4093 } else { 4094 // connection gone -> discard further fragments 4095 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4096 hci_stack->acl_fragmentation_total_size = 0; 4097 hci_stack->acl_fragmentation_pos = 0; 4098 } 4099 } 4100 return false; 4101 } 4102 4103 #ifdef ENABLE_CLASSIC 4104 static bool hci_run_general_gap_classic(void){ 4105 4106 // decline incoming connections 4107 if (hci_stack->decline_reason){ 4108 uint8_t reason = hci_stack->decline_reason; 4109 hci_stack->decline_reason = 0; 4110 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4111 return true; 4112 } 4113 // write page scan activity 4114 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_interval != 0xffff) && hci_classic_supported()){ 4115 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 4116 hci_stack->new_page_scan_interval = 0xffff; 4117 hci_stack->new_page_scan_window = 0xffff; 4118 return true; 4119 } 4120 // write page scan type 4121 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_type != 0xff) && hci_classic_supported()){ 4122 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 4123 hci_stack->new_page_scan_type = 0xff; 4124 return true; 4125 } 4126 // send scan enable 4127 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 4128 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 4129 hci_stack->new_scan_enable_value = 0xff; 4130 return true; 4131 } 4132 // start/stop inquiry 4133 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4134 uint8_t duration = hci_stack->inquiry_state; 4135 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4136 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4137 return true; 4138 } 4139 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4140 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4141 hci_send_cmd(&hci_inquiry_cancel); 4142 return true; 4143 } 4144 // remote name request 4145 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4146 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4147 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4148 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4149 return true; 4150 } 4151 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4152 // Local OOB data 4153 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 4154 hci_stack->classic_read_local_oob_data = false; 4155 if (hci_stack->local_supported_commands[1] & 0x10u){ 4156 hci_send_cmd(&hci_read_local_extended_oob_data); 4157 } else { 4158 hci_send_cmd(&hci_read_local_oob_data); 4159 } 4160 } 4161 #endif 4162 // pairing 4163 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4164 uint8_t state = hci_stack->gap_pairing_state; 4165 uint8_t pin_code[16]; 4166 switch (state){ 4167 case GAP_PAIRING_STATE_SEND_PIN: 4168 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4169 memset(pin_code, 0, 16); 4170 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4171 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4172 break; 4173 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4174 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4175 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4176 break; 4177 case GAP_PAIRING_STATE_SEND_PASSKEY: 4178 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4179 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4180 break; 4181 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4182 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4183 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4184 break; 4185 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4186 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4187 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4188 break; 4189 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4190 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4191 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4192 break; 4193 default: 4194 break; 4195 } 4196 return true; 4197 } 4198 return false; 4199 } 4200 #endif 4201 4202 #ifdef ENABLE_BLE 4203 static bool hci_run_general_gap_le(void){ 4204 4205 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4206 4207 if (hci_stack->state != HCI_STATE_WORKING) return false; 4208 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4209 4210 4211 // Phase 1: collect what to stop 4212 4213 bool scanning_stop = false; 4214 bool connecting_stop = false; 4215 bool advertising_stop = false; 4216 4217 #ifndef ENABLE_LE_CENTRAL 4218 UNUSED(scanning_stop); 4219 UNUSED(connecting_stop); 4220 #endif 4221 #ifndef ENABLE_LE_PERIPHERAL 4222 UNUSED(advertising_stop); 4223 #endif 4224 4225 // check if whitelist needs modification 4226 bool whitelist_modification_pending = false; 4227 btstack_linked_list_iterator_t lit; 4228 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4229 while (btstack_linked_list_iterator_has_next(&lit)){ 4230 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4231 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4232 whitelist_modification_pending = true; 4233 break; 4234 } 4235 } 4236 // check if resolving list needs modification 4237 bool resolving_list_modification_pending = false; 4238 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4239 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4240 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4241 resolving_list_modification_pending = true; 4242 } 4243 #endif 4244 4245 #ifdef ENABLE_LE_CENTRAL 4246 // scanning control 4247 if (hci_stack->le_scanning_active) { 4248 // stop if: 4249 // - parameter change required 4250 // - it's disabled 4251 // - whitelist change required but used for scanning 4252 // - resolving list modified 4253 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4254 if ((hci_stack->le_scanning_param_update) || 4255 !hci_stack->le_scanning_enabled || 4256 scanning_uses_whitelist || 4257 resolving_list_modification_pending){ 4258 4259 scanning_stop = true; 4260 } 4261 } 4262 #endif 4263 4264 #ifdef ENABLE_LE_CENTRAL 4265 // connecting control 4266 bool connecting_with_whitelist; 4267 switch (hci_stack->le_connecting_state){ 4268 case LE_CONNECTING_DIRECT: 4269 case LE_CONNECTING_WHITELIST: 4270 // stop connecting if: 4271 // - connecting uses white and whitelist modification pending 4272 // - if it got disabled 4273 // - resolving list modified 4274 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4275 if ((connecting_with_whitelist && whitelist_modification_pending) || 4276 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4277 resolving_list_modification_pending) { 4278 4279 connecting_stop = true; 4280 } 4281 break; 4282 default: 4283 break; 4284 } 4285 #endif 4286 4287 #ifdef ENABLE_LE_PERIPHERAL 4288 // le advertisement control 4289 if (hci_stack->le_advertisements_active){ 4290 // stop if: 4291 // - parameter change required 4292 // - it's disabled 4293 // - whitelist change required but used for advertisement filter policy 4294 // - resolving list modified 4295 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4296 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4297 if (advertising_change || 4298 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4299 (advertising_uses_whitelist & whitelist_modification_pending) || 4300 resolving_list_modification_pending) { 4301 4302 advertising_stop = true; 4303 } 4304 } 4305 #endif 4306 4307 4308 // Phase 2: stop everything that should be off during modifications 4309 4310 #ifdef ENABLE_LE_CENTRAL 4311 if (scanning_stop){ 4312 hci_stack->le_scanning_active = false; 4313 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4314 return true; 4315 } 4316 #endif 4317 4318 #ifdef ENABLE_LE_CENTRAL 4319 if (connecting_stop){ 4320 hci_send_cmd(&hci_le_create_connection_cancel); 4321 return true; 4322 } 4323 #endif 4324 4325 #ifdef ENABLE_LE_PERIPHERAL 4326 if (advertising_stop){ 4327 hci_stack->le_advertisements_active = false; 4328 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4329 return true; 4330 } 4331 #endif 4332 4333 // Phase 3: modify 4334 4335 #ifdef ENABLE_LE_CENTRAL 4336 if (hci_stack->le_scanning_param_update){ 4337 hci_stack->le_scanning_param_update = false; 4338 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4339 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4340 return true; 4341 } 4342 #endif 4343 4344 #ifdef ENABLE_LE_PERIPHERAL 4345 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4346 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4347 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4348 hci_send_cmd(&hci_le_set_advertising_parameters, 4349 hci_stack->le_advertisements_interval_min, 4350 hci_stack->le_advertisements_interval_max, 4351 hci_stack->le_advertisements_type, 4352 hci_stack->le_advertisements_own_addr_type, 4353 hci_stack->le_advertisements_direct_address_type, 4354 hci_stack->le_advertisements_direct_address, 4355 hci_stack->le_advertisements_channel_map, 4356 hci_stack->le_advertisements_filter_policy); 4357 return true; 4358 } 4359 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4360 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4361 uint8_t adv_data_clean[31]; 4362 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4363 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4364 hci_stack->le_advertisements_data_len); 4365 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4366 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4367 return true; 4368 } 4369 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4370 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4371 uint8_t scan_data_clean[31]; 4372 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4373 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4374 hci_stack->le_scan_response_data_len); 4375 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4376 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4377 return true; 4378 } 4379 #endif 4380 4381 4382 #ifdef ENABLE_LE_CENTRAL 4383 // if connect with whitelist was active and is not cancelled yet, wait until next time 4384 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4385 #endif 4386 4387 // LE Whitelist Management 4388 if (whitelist_modification_pending){ 4389 // add/remove entries 4390 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4391 while (btstack_linked_list_iterator_has_next(&lit)){ 4392 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4393 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4394 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4395 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4396 return true; 4397 } 4398 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4399 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4400 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4401 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4402 return true; 4403 } 4404 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4405 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4406 btstack_memory_whitelist_entry_free(entry); 4407 } 4408 } 4409 } 4410 4411 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4412 // LE Resolving List Management 4413 if (resolving_list_supported) { 4414 uint16_t i; 4415 switch (hci_stack->le_resolving_list_state) { 4416 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4417 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4418 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4419 return true; 4420 case LE_RESOLVING_LIST_READ_SIZE: 4421 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4422 hci_send_cmd(&hci_le_read_resolving_list_size); 4423 return true; 4424 case LE_RESOLVING_LIST_SEND_CLEAR: 4425 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4426 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4427 sizeof(hci_stack->le_resolving_list_add_entries)); 4428 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4429 sizeof(hci_stack->le_resolving_list_remove_entries)); 4430 hci_send_cmd(&hci_le_clear_resolving_list); 4431 return true; 4432 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4433 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4434 uint8_t offset = i >> 3; 4435 uint8_t mask = 1 << (i & 7); 4436 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4437 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4438 bd_addr_t peer_identity_addreses; 4439 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4440 sm_key_t peer_irk; 4441 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4442 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4443 4444 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4445 // trigger whitelist entry 'update' (work around for controller bug) 4446 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4447 while (btstack_linked_list_iterator_has_next(&lit)) { 4448 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4449 if (entry->address_type != peer_identity_addr_type) continue; 4450 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4451 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4452 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4453 } 4454 #endif 4455 4456 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4457 peer_identity_addreses); 4458 return true; 4459 } 4460 4461 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4462 4463 /* fall through */ 4464 4465 case LE_RESOLVING_LIST_ADD_ENTRIES: 4466 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4467 uint8_t offset = i >> 3; 4468 uint8_t mask = 1 << (i & 7); 4469 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4470 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4471 bd_addr_t peer_identity_addreses; 4472 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4473 sm_key_t peer_irk; 4474 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4475 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4476 const uint8_t *local_irk = gap_get_persistent_irk(); 4477 // command uses format specifier 'P' that stores 16-byte value without flip 4478 uint8_t local_irk_flipped[16]; 4479 uint8_t peer_irk_flipped[16]; 4480 reverse_128(local_irk, local_irk_flipped); 4481 reverse_128(peer_irk, peer_irk_flipped); 4482 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4483 peer_irk_flipped, local_irk_flipped); 4484 return true; 4485 } 4486 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4487 break; 4488 4489 default: 4490 break; 4491 } 4492 } 4493 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4494 #endif 4495 4496 // Phase 4: restore state 4497 4498 #ifdef ENABLE_LE_CENTRAL 4499 // re-start scanning 4500 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4501 hci_stack->le_scanning_active = true; 4502 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4503 return true; 4504 } 4505 #endif 4506 4507 #ifdef ENABLE_LE_CENTRAL 4508 // re-start connecting 4509 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4510 bd_addr_t null_addr; 4511 memset(null_addr, 0, 6); 4512 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4513 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4514 hci_send_cmd(&hci_le_create_connection, 4515 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4516 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4517 1, // use whitelist 4518 0, // peer address type 4519 null_addr, // peer bd addr 4520 hci_stack->le_connection_own_addr_type, // our addr type: 4521 hci_stack->le_connection_interval_min, // conn interval min 4522 hci_stack->le_connection_interval_max, // conn interval max 4523 hci_stack->le_connection_latency, // conn latency 4524 hci_stack->le_supervision_timeout, // conn latency 4525 hci_stack->le_minimum_ce_length, // min ce length 4526 hci_stack->le_maximum_ce_length // max ce length 4527 ); 4528 return true; 4529 } 4530 #endif 4531 4532 #ifdef ENABLE_LE_PERIPHERAL 4533 // re-start advertising 4534 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4535 // check if advertisements should be enabled given 4536 hci_stack->le_advertisements_active = true; 4537 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_advertisements_own_address); 4538 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4539 return true; 4540 } 4541 #endif 4542 4543 return false; 4544 } 4545 #endif 4546 4547 static bool hci_run_general_pending_commands(void){ 4548 btstack_linked_item_t * it; 4549 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4550 hci_connection_t * connection = (hci_connection_t *) it; 4551 4552 switch(connection->state){ 4553 case SEND_CREATE_CONNECTION: 4554 switch(connection->address_type){ 4555 #ifdef ENABLE_CLASSIC 4556 case BD_ADDR_TYPE_ACL: 4557 log_info("sending hci_create_connection"); 4558 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4559 break; 4560 #endif 4561 default: 4562 #ifdef ENABLE_BLE 4563 #ifdef ENABLE_LE_CENTRAL 4564 log_info("sending hci_le_create_connection"); 4565 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4566 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4567 hci_send_cmd(&hci_le_create_connection, 4568 hci_stack->le_connection_scan_interval, // conn scan interval 4569 hci_stack->le_connection_scan_window, // conn scan windows 4570 0, // don't use whitelist 4571 connection->address_type, // peer address type 4572 connection->address, // peer bd addr 4573 hci_stack->le_connection_own_addr_type, // our addr type: 4574 hci_stack->le_connection_interval_min, // conn interval min 4575 hci_stack->le_connection_interval_max, // conn interval max 4576 hci_stack->le_connection_latency, // conn latency 4577 hci_stack->le_supervision_timeout, // conn latency 4578 hci_stack->le_minimum_ce_length, // min ce length 4579 hci_stack->le_maximum_ce_length // max ce length 4580 ); 4581 connection->state = SENT_CREATE_CONNECTION; 4582 #endif 4583 #endif 4584 break; 4585 } 4586 return true; 4587 4588 #ifdef ENABLE_CLASSIC 4589 case RECEIVED_CONNECTION_REQUEST: 4590 connection->role = HCI_ROLE_SLAVE; 4591 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4592 log_info("sending hci_accept_connection_request"); 4593 connection->state = ACCEPTED_CONNECTION_REQUEST; 4594 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4595 } 4596 return true; 4597 #endif 4598 4599 #ifdef ENABLE_BLE 4600 #ifdef ENABLE_LE_CENTRAL 4601 case SEND_CANCEL_CONNECTION: 4602 connection->state = SENT_CANCEL_CONNECTION; 4603 hci_send_cmd(&hci_le_create_connection_cancel); 4604 return true; 4605 #endif 4606 #endif 4607 case SEND_DISCONNECT: 4608 connection->state = SENT_DISCONNECT; 4609 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4610 return true; 4611 4612 default: 4613 break; 4614 } 4615 4616 // no further commands if connection is about to get shut down 4617 if (connection->state == SENT_DISCONNECT) continue; 4618 4619 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4620 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4621 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4622 return true; 4623 } 4624 4625 #ifdef ENABLE_CLASSIC 4626 4627 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4628 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4629 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4630 return true; 4631 } 4632 4633 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4634 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4635 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4636 return true; 4637 } 4638 4639 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4640 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4641 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4642 return true; 4643 } 4644 4645 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4646 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4647 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4648 return true; 4649 } 4650 4651 // Handling link key request requires remote supported features 4652 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4653 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4654 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4655 4656 // lookup link key using cached key first 4657 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4658 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4659 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4660 } 4661 4662 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4663 if (have_link_key && security_level_sufficient){ 4664 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4665 } else { 4666 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4667 } 4668 return true; 4669 } 4670 4671 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4672 log_info("denying to pin request"); 4673 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4674 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4675 return true; 4676 } 4677 4678 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4679 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4680 // set authentication requirements: 4681 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4682 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4683 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4684 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4685 authreq |= 1; 4686 } 4687 bool bonding = hci_stack->bondable; 4688 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4689 // if we have received IO Cap Response, we're in responder role 4690 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4691 if (bonding && !remote_bonding){ 4692 log_info("Remote not bonding, dropping local flag"); 4693 bonding = false; 4694 } 4695 } 4696 if (bonding){ 4697 if (connection->bonding_flags & BONDING_DEDICATED){ 4698 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4699 } else { 4700 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4701 } 4702 } 4703 uint8_t have_oob_data = 0; 4704 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4705 if (connection->classic_oob_c_192 != NULL){ 4706 have_oob_data |= 1; 4707 } 4708 if (connection->classic_oob_c_256 != NULL){ 4709 have_oob_data |= 2; 4710 } 4711 #endif 4712 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4713 return true; 4714 } 4715 4716 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4717 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4718 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4719 return true; 4720 } 4721 4722 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4723 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4724 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4725 const uint8_t zero[16] = { 0 }; 4726 const uint8_t * r_192 = zero; 4727 const uint8_t * c_192 = zero; 4728 const uint8_t * r_256 = zero; 4729 const uint8_t * c_256 = zero; 4730 // verify P-256 OOB 4731 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4732 c_256 = connection->classic_oob_c_256; 4733 if (connection->classic_oob_r_256 != NULL) { 4734 r_256 = connection->classic_oob_r_256; 4735 } 4736 } 4737 // verify P-192 OOB 4738 if ((connection->classic_oob_c_192 != NULL)) { 4739 c_192 = connection->classic_oob_c_192; 4740 if (connection->classic_oob_r_192 != NULL) { 4741 r_192 = connection->classic_oob_r_192; 4742 } 4743 } 4744 4745 // assess security 4746 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4747 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4748 if (need_level_4 && !can_reach_level_4){ 4749 log_info("Level 4 required, but not possible -> abort"); 4750 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4751 // send oob negative reply 4752 c_256 = NULL; 4753 c_192 = NULL; 4754 } 4755 4756 // Reply 4757 if (c_256 != zero) { 4758 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4759 } else if (c_192 != zero){ 4760 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4761 } else { 4762 hci_stack->classic_oob_con_handle = connection->con_handle; 4763 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4764 } 4765 return true; 4766 } 4767 #endif 4768 4769 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4770 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4771 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4772 return true; 4773 } 4774 4775 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4776 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4777 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4778 return true; 4779 } 4780 4781 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4782 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4783 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4784 return true; 4785 } 4786 4787 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4788 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4789 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4790 connection->state = SENT_DISCONNECT; 4791 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4792 return true; 4793 } 4794 4795 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4796 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4797 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4798 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4799 return true; 4800 } 4801 4802 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4803 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4804 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4805 return true; 4806 } 4807 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4808 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4809 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4810 return true; 4811 } 4812 #endif 4813 4814 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4815 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4816 #ifdef ENABLE_CLASSIC 4817 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4818 #endif 4819 if (connection->state != SENT_DISCONNECT){ 4820 connection->state = SENT_DISCONNECT; 4821 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4822 return true; 4823 } 4824 } 4825 4826 #ifdef ENABLE_CLASSIC 4827 uint16_t sniff_min_interval; 4828 switch (connection->sniff_min_interval){ 4829 case 0: 4830 break; 4831 case 0xffff: 4832 connection->sniff_min_interval = 0; 4833 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4834 return true; 4835 default: 4836 sniff_min_interval = connection->sniff_min_interval; 4837 connection->sniff_min_interval = 0; 4838 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4839 return true; 4840 } 4841 4842 if (connection->sniff_subrating_max_latency != 0xffff){ 4843 uint16_t max_latency = connection->sniff_subrating_max_latency; 4844 connection->sniff_subrating_max_latency = 0; 4845 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4846 return true; 4847 } 4848 4849 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4850 uint8_t service_type = (uint8_t) connection->qos_service_type; 4851 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4852 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); 4853 return true; 4854 } 4855 4856 if (connection->request_role != HCI_ROLE_INVALID){ 4857 hci_role_t role = connection->request_role; 4858 connection->request_role = HCI_ROLE_INVALID; 4859 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4860 return true; 4861 } 4862 #endif 4863 4864 #ifdef ENABLE_BLE 4865 switch (connection->le_con_parameter_update_state){ 4866 // response to L2CAP CON PARAMETER UPDATE REQUEST 4867 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4868 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4869 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4870 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4871 0x0000, 0xffff); 4872 return true; 4873 case CON_PARAMETER_UPDATE_REPLY: 4874 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4875 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4876 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4877 0x0000, 0xffff); 4878 return true; 4879 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4880 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4881 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4882 return true; 4883 default: 4884 break; 4885 } 4886 if (connection->le_phy_update_all_phys != 0xffu){ 4887 uint8_t all_phys = connection->le_phy_update_all_phys; 4888 connection->le_phy_update_all_phys = 0xff; 4889 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); 4890 return true; 4891 } 4892 #endif 4893 } 4894 return false; 4895 } 4896 4897 static void hci_run(void){ 4898 4899 bool done; 4900 4901 // send continuation fragments first, as they block the prepared packet buffer 4902 done = hci_run_acl_fragments(); 4903 if (done) return; 4904 4905 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4906 // send host num completed packets next as they don't require num_cmd_packets > 0 4907 if (!hci_can_send_comand_packet_transport()) return; 4908 if (hci_stack->host_completed_packets){ 4909 hci_host_num_completed_packets(); 4910 return; 4911 } 4912 #endif 4913 4914 if (!hci_can_send_command_packet_now()) return; 4915 4916 // global/non-connection oriented commands 4917 4918 4919 #ifdef ENABLE_CLASSIC 4920 // general gap classic 4921 done = hci_run_general_gap_classic(); 4922 if (done) return; 4923 #endif 4924 4925 #ifdef ENABLE_BLE 4926 // general gap le 4927 done = hci_run_general_gap_le(); 4928 if (done) return; 4929 #endif 4930 4931 // send pending HCI commands 4932 done = hci_run_general_pending_commands(); 4933 if (done) return; 4934 4935 // stack state sub statemachines 4936 hci_connection_t * connection; 4937 switch (hci_stack->state){ 4938 case HCI_STATE_INITIALIZING: 4939 hci_initializing_run(); 4940 break; 4941 4942 case HCI_STATE_HALTING: 4943 4944 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4945 switch (hci_stack->substate){ 4946 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4947 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4948 4949 #ifdef ENABLE_BLE 4950 #ifdef ENABLE_LE_CENTRAL 4951 // free whitelist entries 4952 { 4953 btstack_linked_list_iterator_t lit; 4954 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4955 while (btstack_linked_list_iterator_has_next(&lit)){ 4956 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4957 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4958 btstack_memory_whitelist_entry_free(entry); 4959 } 4960 } 4961 #endif 4962 #endif 4963 // close all open connections 4964 connection = (hci_connection_t *) hci_stack->connections; 4965 if (connection){ 4966 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4967 if (!hci_can_send_command_packet_now()) return; 4968 4969 // check state 4970 if (connection->state == SENT_DISCONNECT) return; 4971 connection->state = SENT_DISCONNECT; 4972 4973 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4974 4975 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4976 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4977 4978 // ... which would be ignored anyway as we shutdown (free) the connection now 4979 hci_shutdown_connection(connection); 4980 4981 // finally, send the disconnect command 4982 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4983 return; 4984 } 4985 4986 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4987 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4988 log_info("HCI_STATE_HALTING: wait 50 ms"); 4989 hci_stack->substate = HCI_HALTING_W4_TIMER; 4990 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4991 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4992 btstack_run_loop_add_timer(&hci_stack->timeout); 4993 break; 4994 } 4995 4996 /* fall through */ 4997 4998 case HCI_HALTING_CLOSE: 4999 log_info("HCI_STATE_HALTING, calling off"); 5000 5001 // switch mode 5002 hci_power_control_off(); 5003 5004 log_info("HCI_STATE_HALTING, emitting state"); 5005 hci_emit_state(); 5006 log_info("HCI_STATE_HALTING, done"); 5007 break; 5008 5009 case HCI_HALTING_W4_TIMER: 5010 // keep waiting 5011 5012 break; 5013 default: 5014 break; 5015 } 5016 5017 break; 5018 5019 case HCI_STATE_FALLING_ASLEEP: 5020 switch(hci_stack->substate) { 5021 case HCI_FALLING_ASLEEP_DISCONNECT: 5022 log_info("HCI_STATE_FALLING_ASLEEP"); 5023 // close all open connections 5024 connection = (hci_connection_t *) hci_stack->connections; 5025 5026 #ifdef HAVE_PLATFORM_IPHONE_OS 5027 // don't close connections, if H4 supports power management 5028 if (btstack_control_iphone_power_management_enabled()){ 5029 connection = NULL; 5030 } 5031 #endif 5032 if (connection){ 5033 5034 // send disconnect 5035 if (!hci_can_send_command_packet_now()) return; 5036 5037 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5038 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5039 5040 // send disconnected event right away - causes higher layer connections to get closed, too. 5041 hci_shutdown_connection(connection); 5042 return; 5043 } 5044 5045 if (hci_classic_supported()){ 5046 // disable page and inquiry scan 5047 if (!hci_can_send_command_packet_now()) return; 5048 5049 log_info("HCI_STATE_HALTING, disabling inq scans"); 5050 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5051 5052 // continue in next sub state 5053 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5054 break; 5055 } 5056 5057 /* fall through */ 5058 5059 case HCI_FALLING_ASLEEP_COMPLETE: 5060 log_info("HCI_STATE_HALTING, calling sleep"); 5061 #ifdef HAVE_PLATFORM_IPHONE_OS 5062 // don't actually go to sleep, if H4 supports power management 5063 if (btstack_control_iphone_power_management_enabled()){ 5064 // SLEEP MODE reached 5065 hci_stack->state = HCI_STATE_SLEEPING; 5066 hci_emit_state(); 5067 break; 5068 } 5069 #endif 5070 // switch mode 5071 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5072 hci_emit_state(); 5073 break; 5074 5075 default: 5076 break; 5077 } 5078 break; 5079 5080 default: 5081 break; 5082 } 5083 } 5084 5085 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5086 // house-keeping 5087 5088 #ifdef ENABLE_CLASSIC 5089 bd_addr_t addr; 5090 hci_connection_t * conn; 5091 #endif 5092 #ifdef ENABLE_LE_CENTRAL 5093 uint8_t initiator_filter_policy; 5094 #endif 5095 5096 uint16_t opcode = little_endian_read_16(packet, 0); 5097 switch (opcode) { 5098 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5099 hci_stack->loopback_mode = packet[3]; 5100 break; 5101 5102 #ifdef ENABLE_CLASSIC 5103 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5104 reverse_bd_addr(&packet[3], addr); 5105 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5106 5107 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5108 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5109 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5110 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5111 } 5112 5113 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5114 if (!conn) { 5115 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5116 if (!conn) { 5117 // notify client that alloc failed 5118 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5119 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5120 } 5121 conn->state = SEND_CREATE_CONNECTION; 5122 conn->role = HCI_ROLE_MASTER; 5123 } 5124 log_info("conn state %u", conn->state); 5125 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5126 switch (conn->state) { 5127 // if connection active exists 5128 case OPEN: 5129 // and OPEN, emit connection complete command 5130 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5131 // packet not sent to controller 5132 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5133 case RECEIVED_DISCONNECTION_COMPLETE: 5134 // create connection triggered in disconnect complete event, let's do it now 5135 break; 5136 case SEND_CREATE_CONNECTION: 5137 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5138 break; 5139 default: 5140 // otherwise, just ignore as it is already in the open process 5141 // packet not sent to controller 5142 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5143 } 5144 conn->state = SENT_CREATE_CONNECTION; 5145 5146 // track outgoing connection 5147 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5148 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5149 break; 5150 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5151 if (hci_stack->link_key_db) { 5152 reverse_bd_addr(&packet[3], addr); 5153 hci_stack->link_key_db->delete_link_key(addr); 5154 } 5155 break; 5156 5157 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5158 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5159 // setup_synchronous_connection? Voice setting at offset 22 5160 // TODO: compare to current setting if sco connection already active 5161 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5162 break; 5163 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5164 // accept_synchronus_connection? Voice setting at offset 18 5165 // TODO: compare to current setting if sco connection already active 5166 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5167 break; 5168 #endif 5169 #endif 5170 5171 #ifdef ENABLE_BLE 5172 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5173 hci_stack->le_random_address_set = 1; 5174 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5175 break; 5176 #ifdef ENABLE_LE_PERIPHERAL 5177 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5178 hci_stack->le_advertisements_active = packet[3] != 0; 5179 break; 5180 #endif 5181 #ifdef ENABLE_LE_CENTRAL 5182 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5183 // white list used? 5184 initiator_filter_policy = packet[7]; 5185 switch (initiator_filter_policy) { 5186 case 0: 5187 // whitelist not used 5188 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5189 break; 5190 case 1: 5191 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5192 break; 5193 default: 5194 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5195 break; 5196 } 5197 // track outgoing connection 5198 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5199 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5200 break; 5201 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5202 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5203 break; 5204 #endif 5205 #endif 5206 default: 5207 break; 5208 } 5209 5210 hci_stack->num_cmd_packets--; 5211 5212 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5213 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5214 if (err != 0){ 5215 return ERROR_CODE_HARDWARE_FAILURE; 5216 } 5217 return ERROR_CODE_SUCCESS; 5218 } 5219 5220 // disconnect because of security block 5221 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5222 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5223 if (!connection) return; 5224 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5225 } 5226 5227 5228 // Configure Secure Simple Pairing 5229 5230 #ifdef ENABLE_CLASSIC 5231 5232 // enable will enable SSP during init 5233 void gap_ssp_set_enable(int enable){ 5234 hci_stack->ssp_enable = enable; 5235 } 5236 5237 static int hci_local_ssp_activated(void){ 5238 return gap_ssp_supported() && hci_stack->ssp_enable; 5239 } 5240 5241 // if set, BTstack will respond to io capability request using authentication requirement 5242 void gap_ssp_set_io_capability(int io_capability){ 5243 hci_stack->ssp_io_capability = io_capability; 5244 } 5245 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5246 hci_stack->ssp_authentication_requirement = authentication_requirement; 5247 } 5248 5249 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5250 void gap_ssp_set_auto_accept(int auto_accept){ 5251 hci_stack->ssp_auto_accept = auto_accept; 5252 } 5253 5254 void gap_secure_connections_enable(bool enable){ 5255 hci_stack->secure_connections_enable = enable; 5256 } 5257 5258 #endif 5259 5260 // va_list part of hci_send_cmd 5261 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5262 if (!hci_can_send_command_packet_now()){ 5263 log_error("hci_send_cmd called but cannot send packet now"); 5264 return ERROR_CODE_COMMAND_DISALLOWED; 5265 } 5266 5267 // for HCI INITIALIZATION 5268 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5269 hci_stack->last_cmd_opcode = cmd->opcode; 5270 5271 hci_reserve_packet_buffer(); 5272 uint8_t * packet = hci_stack->hci_packet_buffer; 5273 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5274 uint8_t status = hci_send_cmd_packet(packet, size); 5275 5276 // release packet buffer on error or for synchronous transport implementations 5277 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5278 hci_release_packet_buffer(); 5279 hci_emit_transport_packet_sent(); 5280 } 5281 5282 return status; 5283 } 5284 5285 /** 5286 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5287 */ 5288 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5289 va_list argptr; 5290 va_start(argptr, cmd); 5291 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5292 va_end(argptr); 5293 return status; 5294 } 5295 5296 // Create various non-HCI events. 5297 // TODO: generalize, use table similar to hci_create_command 5298 5299 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5300 // dump packet 5301 if (dump) { 5302 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5303 } 5304 5305 // dispatch to all event handlers 5306 btstack_linked_list_iterator_t it; 5307 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5308 while (btstack_linked_list_iterator_has_next(&it)){ 5309 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5310 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5311 } 5312 } 5313 5314 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5315 if (!hci_stack->acl_packet_handler) return; 5316 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5317 } 5318 5319 #ifdef ENABLE_CLASSIC 5320 static void hci_notify_if_sco_can_send_now(void){ 5321 // notify SCO sender if waiting 5322 if (!hci_stack->sco_waiting_for_can_send_now) return; 5323 if (hci_can_send_sco_packet_now()){ 5324 hci_stack->sco_waiting_for_can_send_now = 0; 5325 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5326 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5327 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5328 } 5329 } 5330 5331 // parsing end emitting has been merged to reduce code size 5332 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5333 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5334 5335 uint8_t * eir_data; 5336 ad_context_t context; 5337 const uint8_t * name; 5338 uint8_t name_len; 5339 5340 if (size < 3) return; 5341 5342 int event_type = hci_event_packet_get_type(packet); 5343 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5344 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5345 5346 switch (event_type){ 5347 case HCI_EVENT_INQUIRY_RESULT: 5348 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5349 if (size != (3 + (num_responses * 14))) return; 5350 break; 5351 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5352 if (size != 257) return; 5353 if (num_responses != 1) return; 5354 break; 5355 default: 5356 return; 5357 } 5358 5359 // event[1] is set at the end 5360 int i; 5361 for (i=0; i<num_responses;i++){ 5362 memset(event, 0, sizeof(event)); 5363 event[0] = GAP_EVENT_INQUIRY_RESULT; 5364 uint8_t event_size = 27; // if name is not set by EIR 5365 5366 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5367 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5368 (void)memcpy(&event[9], 5369 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5370 3); // class of device 5371 (void)memcpy(&event[12], 5372 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5373 2); // clock offset 5374 5375 switch (event_type){ 5376 case HCI_EVENT_INQUIRY_RESULT: 5377 // 14,15,16,17 = 0, size 18 5378 break; 5379 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5380 event[14] = 1; 5381 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5382 // 16,17 = 0, size 18 5383 break; 5384 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5385 event[14] = 1; 5386 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5387 // EIR packets only contain a single inquiry response 5388 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5389 name = NULL; 5390 // Iterate over EIR data 5391 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5392 uint8_t data_type = ad_iterator_get_data_type(&context); 5393 uint8_t data_size = ad_iterator_get_data_len(&context); 5394 const uint8_t * data = ad_iterator_get_data(&context); 5395 // Prefer Complete Local Name over Shortened Local Name 5396 switch (data_type){ 5397 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5398 if (name) continue; 5399 /* fall through */ 5400 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5401 name = data; 5402 name_len = data_size; 5403 break; 5404 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5405 if (data_size != 8) break; 5406 event[16] = 1; 5407 memcpy(&event[17], data, 8); 5408 break; 5409 default: 5410 break; 5411 } 5412 } 5413 if (name){ 5414 event[25] = 1; 5415 // truncate name if needed 5416 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5417 event[26] = len; 5418 (void)memcpy(&event[27], name, len); 5419 event_size += len; 5420 } 5421 break; 5422 default: 5423 return; 5424 } 5425 event[1] = event_size - 2; 5426 hci_emit_event(event, event_size, 1); 5427 } 5428 } 5429 #endif 5430 5431 void hci_emit_state(void){ 5432 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5433 uint8_t event[3]; 5434 event[0] = BTSTACK_EVENT_STATE; 5435 event[1] = sizeof(event) - 2u; 5436 event[2] = hci_stack->state; 5437 hci_emit_event(event, sizeof(event), 1); 5438 } 5439 5440 #ifdef ENABLE_CLASSIC 5441 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5442 uint8_t event[13]; 5443 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5444 event[1] = sizeof(event) - 2; 5445 event[2] = status; 5446 little_endian_store_16(event, 3, con_handle); 5447 reverse_bd_addr(address, &event[5]); 5448 event[11] = 1; // ACL connection 5449 event[12] = 0; // encryption disabled 5450 hci_emit_event(event, sizeof(event), 1); 5451 } 5452 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5453 if (disable_l2cap_timeouts) return; 5454 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5455 uint8_t event[4]; 5456 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5457 event[1] = sizeof(event) - 2; 5458 little_endian_store_16(event, 2, conn->con_handle); 5459 hci_emit_event(event, sizeof(event), 1); 5460 } 5461 #endif 5462 5463 #ifdef ENABLE_BLE 5464 #ifdef ENABLE_LE_CENTRAL 5465 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){ 5466 uint8_t event[21]; 5467 event[0] = HCI_EVENT_LE_META; 5468 event[1] = sizeof(event) - 2u; 5469 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5470 event[3] = status; 5471 little_endian_store_16(event, 4, con_handle); 5472 event[6] = 0; // TODO: role 5473 event[7] = address_type; 5474 reverse_bd_addr(address, &event[8]); 5475 little_endian_store_16(event, 14, 0); // interval 5476 little_endian_store_16(event, 16, 0); // latency 5477 little_endian_store_16(event, 18, 0); // supervision timeout 5478 event[20] = 0; // master clock accuracy 5479 hci_emit_event(event, sizeof(event), 1); 5480 } 5481 #endif 5482 #endif 5483 5484 static void hci_emit_transport_packet_sent(void){ 5485 // notify upper stack that it might be possible to send again 5486 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5487 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5488 } 5489 5490 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5491 uint8_t event[6]; 5492 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5493 event[1] = sizeof(event) - 2u; 5494 event[2] = 0; // status = OK 5495 little_endian_store_16(event, 3, con_handle); 5496 event[5] = reason; 5497 hci_emit_event(event, sizeof(event), 1); 5498 } 5499 5500 static void hci_emit_nr_connections_changed(void){ 5501 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5502 uint8_t event[3]; 5503 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5504 event[1] = sizeof(event) - 2u; 5505 event[2] = nr_hci_connections(); 5506 hci_emit_event(event, sizeof(event), 1); 5507 } 5508 5509 static void hci_emit_hci_open_failed(void){ 5510 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5511 uint8_t event[2]; 5512 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5513 event[1] = sizeof(event) - 2u; 5514 hci_emit_event(event, sizeof(event), 1); 5515 } 5516 5517 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5518 log_info("hci_emit_dedicated_bonding_result %u ", status); 5519 uint8_t event[9]; 5520 int pos = 0; 5521 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5522 event[pos++] = sizeof(event) - 2u; 5523 event[pos++] = status; 5524 reverse_bd_addr(address, &event[pos]); 5525 hci_emit_event(event, sizeof(event), 1); 5526 } 5527 5528 5529 #ifdef ENABLE_CLASSIC 5530 5531 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5532 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5533 uint8_t event[5]; 5534 int pos = 0; 5535 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5536 event[pos++] = sizeof(event) - 2; 5537 little_endian_store_16(event, 2, con_handle); 5538 pos += 2; 5539 event[pos++] = level; 5540 hci_emit_event(event, sizeof(event), 1); 5541 } 5542 5543 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5544 if (!connection) return LEVEL_0; 5545 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5546 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5547 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5548 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5549 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5550 // LEVEL 4 always requires 128 bit encrytion key size 5551 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5552 security_level = LEVEL_3; 5553 } 5554 return security_level; 5555 } 5556 5557 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5558 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5559 uint8_t event[3]; 5560 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5561 event[1] = sizeof(event) - 2; 5562 event[2] = enabled; 5563 hci_emit_event(event, sizeof(event), 1); 5564 } 5565 5566 // query if remote side supports eSCO 5567 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5568 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5569 if (!connection) return false; 5570 return (connection->remote_supported_features[0] & 1) != 0; 5571 } 5572 5573 static bool hci_ssp_supported(hci_connection_t * connection){ 5574 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5575 return (connection->bonding_flags & mask) == mask; 5576 } 5577 5578 // query if remote side supports SSP 5579 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5580 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5581 if (!connection) return false; 5582 return hci_ssp_supported(connection) ? 1 : 0; 5583 } 5584 5585 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5586 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5587 } 5588 5589 // GAP API 5590 /** 5591 * @bbrief enable/disable bonding. default is enabled 5592 * @praram enabled 5593 */ 5594 void gap_set_bondable_mode(int enable){ 5595 hci_stack->bondable = enable ? 1 : 0; 5596 } 5597 /** 5598 * @brief Get bondable mode. 5599 * @return 1 if bondable 5600 */ 5601 int gap_get_bondable_mode(void){ 5602 return hci_stack->bondable; 5603 } 5604 5605 /** 5606 * @brief map link keys to security levels 5607 */ 5608 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5609 switch (link_key_type){ 5610 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5611 return LEVEL_4; 5612 case COMBINATION_KEY: 5613 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5614 return LEVEL_3; 5615 default: 5616 return LEVEL_2; 5617 } 5618 } 5619 5620 /** 5621 * @brief map link keys to secure connection yes/no 5622 */ 5623 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5624 switch (link_key_type){ 5625 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5626 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5627 return 1; 5628 default: 5629 return 0; 5630 } 5631 } 5632 5633 /** 5634 * @brief map link keys to authenticated 5635 */ 5636 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5637 switch (link_key_type){ 5638 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5639 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5640 return 1; 5641 default: 5642 return 0; 5643 } 5644 } 5645 5646 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5647 log_info("gap_mitm_protection_required_for_security_level %u", level); 5648 return level > LEVEL_2; 5649 } 5650 5651 /** 5652 * @brief get current security level 5653 */ 5654 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5655 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5656 if (!connection) return LEVEL_0; 5657 return gap_security_level_for_connection(connection); 5658 } 5659 5660 /** 5661 * @brief request connection to device to 5662 * @result GAP_AUTHENTICATION_RESULT 5663 */ 5664 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5665 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5666 if (!connection){ 5667 hci_emit_security_level(con_handle, LEVEL_0); 5668 return; 5669 } 5670 5671 btstack_assert(hci_is_le_connection(connection) == false); 5672 5673 // 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) 5674 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5675 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5676 requested_level = LEVEL_4; 5677 } 5678 5679 gap_security_level_t current_level = gap_security_level(con_handle); 5680 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5681 requested_level, connection->requested_security_level, current_level); 5682 5683 // authentication active if authentication request was sent or planned level > 0 5684 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5685 if (authentication_active){ 5686 // authentication already active 5687 if (connection->requested_security_level < requested_level){ 5688 // increase requested level as new level is higher 5689 // TODO: handle re-authentication when done 5690 connection->requested_security_level = requested_level; 5691 } 5692 } else { 5693 // no request active, notify if security sufficient 5694 if (requested_level <= current_level){ 5695 hci_emit_security_level(con_handle, current_level); 5696 return; 5697 } 5698 5699 // store request 5700 connection->requested_security_level = requested_level; 5701 5702 // start to authenticate connection 5703 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5704 hci_run(); 5705 } 5706 } 5707 5708 /** 5709 * @brief start dedicated bonding with device. disconnect after bonding 5710 * @param device 5711 * @param request MITM protection 5712 * @result GAP_DEDICATED_BONDING_COMPLETE 5713 */ 5714 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5715 5716 // create connection state machine 5717 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5718 5719 if (!connection){ 5720 return BTSTACK_MEMORY_ALLOC_FAILED; 5721 } 5722 5723 // delete linkn key 5724 gap_drop_link_key_for_bd_addr(device); 5725 5726 // configure LEVEL_2/3, dedicated bonding 5727 connection->state = SEND_CREATE_CONNECTION; 5728 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5729 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5730 connection->bonding_flags = BONDING_DEDICATED; 5731 5732 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5733 5734 // handle: connnection failure (connection complete != ok) 5735 // handle: authentication failure 5736 // handle: disconnect on done 5737 5738 hci_run(); 5739 5740 return 0; 5741 } 5742 #endif 5743 5744 void gap_set_local_name(const char * local_name){ 5745 hci_stack->local_name = local_name; 5746 } 5747 5748 5749 #ifdef ENABLE_BLE 5750 5751 #ifdef ENABLE_LE_CENTRAL 5752 void gap_start_scan(void){ 5753 hci_stack->le_scanning_enabled = true; 5754 hci_run(); 5755 } 5756 5757 void gap_stop_scan(void){ 5758 hci_stack->le_scanning_enabled = false; 5759 hci_run(); 5760 } 5761 5762 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5763 hci_stack->le_scan_type = scan_type; 5764 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5765 hci_stack->le_scan_interval = scan_interval; 5766 hci_stack->le_scan_window = scan_window; 5767 hci_stack->le_scanning_param_update = true; 5768 hci_run(); 5769 } 5770 5771 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5772 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5773 } 5774 5775 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5776 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5777 if (!conn){ 5778 // disallow if le connection is already outgoing 5779 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5780 log_error("le connection already active"); 5781 return ERROR_CODE_COMMAND_DISALLOWED; 5782 } 5783 5784 log_info("gap_connect: no connection exists yet, creating context"); 5785 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5786 if (!conn){ 5787 // notify client that alloc failed 5788 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5789 log_info("gap_connect: failed to alloc hci_connection_t"); 5790 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5791 } 5792 5793 // set le connecting state 5794 if (hci_is_le_connection_type(addr_type)){ 5795 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5796 } 5797 5798 conn->state = SEND_CREATE_CONNECTION; 5799 log_info("gap_connect: send create connection next"); 5800 hci_run(); 5801 return ERROR_CODE_SUCCESS; 5802 } 5803 5804 if (!hci_is_le_connection(conn) || 5805 (conn->state == SEND_CREATE_CONNECTION) || 5806 (conn->state == SENT_CREATE_CONNECTION)) { 5807 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5808 log_error("gap_connect: classic connection or connect is already being created"); 5809 return GATT_CLIENT_IN_WRONG_STATE; 5810 } 5811 5812 // check if connection was just disconnected 5813 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5814 log_info("gap_connect: send create connection (again)"); 5815 conn->state = SEND_CREATE_CONNECTION; 5816 hci_run(); 5817 return ERROR_CODE_SUCCESS; 5818 } 5819 5820 log_info("gap_connect: context exists with state %u", conn->state); 5821 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5822 hci_run(); 5823 return ERROR_CODE_SUCCESS; 5824 } 5825 5826 // @assumption: only a single outgoing LE Connection exists 5827 static hci_connection_t * gap_get_outgoing_connection(void){ 5828 btstack_linked_item_t *it; 5829 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5830 hci_connection_t * conn = (hci_connection_t *) it; 5831 if (!hci_is_le_connection(conn)) continue; 5832 switch (conn->state){ 5833 case SEND_CREATE_CONNECTION: 5834 case SENT_CREATE_CONNECTION: 5835 case SENT_CANCEL_CONNECTION: 5836 return conn; 5837 default: 5838 break; 5839 }; 5840 } 5841 return NULL; 5842 } 5843 5844 uint8_t gap_connect_cancel(void){ 5845 hci_connection_t * conn = gap_get_outgoing_connection(); 5846 if (!conn) return 0; 5847 switch (conn->state){ 5848 case SEND_CREATE_CONNECTION: 5849 // skip sending create connection and emit event instead 5850 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5851 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5852 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5853 btstack_memory_hci_connection_free( conn ); 5854 break; 5855 case SENT_CREATE_CONNECTION: 5856 // request to send cancel connection 5857 conn->state = SEND_CANCEL_CONNECTION; 5858 hci_run(); 5859 break; 5860 default: 5861 break; 5862 } 5863 return 0; 5864 } 5865 #endif 5866 5867 #ifdef ENABLE_LE_CENTRAL 5868 /** 5869 * @brief Set connection parameters for outgoing connections 5870 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5871 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5872 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5873 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5874 * @param conn_latency, default: 4 5875 * @param supervision_timeout (unit: 10ms), default: 720 ms 5876 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5877 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5878 */ 5879 5880 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5881 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5882 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5883 hci_stack->le_connection_scan_interval = conn_scan_interval; 5884 hci_stack->le_connection_scan_window = conn_scan_window; 5885 hci_stack->le_connection_interval_min = conn_interval_min; 5886 hci_stack->le_connection_interval_max = conn_interval_max; 5887 hci_stack->le_connection_latency = conn_latency; 5888 hci_stack->le_supervision_timeout = supervision_timeout; 5889 hci_stack->le_minimum_ce_length = min_ce_length; 5890 hci_stack->le_maximum_ce_length = max_ce_length; 5891 } 5892 #endif 5893 5894 /** 5895 * @brief Updates the connection parameters for a given LE connection 5896 * @param handle 5897 * @param conn_interval_min (unit: 1.25ms) 5898 * @param conn_interval_max (unit: 1.25ms) 5899 * @param conn_latency 5900 * @param supervision_timeout (unit: 10ms) 5901 * @returns 0 if ok 5902 */ 5903 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5904 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5905 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5906 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5907 connection->le_conn_interval_min = conn_interval_min; 5908 connection->le_conn_interval_max = conn_interval_max; 5909 connection->le_conn_latency = conn_latency; 5910 connection->le_supervision_timeout = supervision_timeout; 5911 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5912 hci_run(); 5913 return 0; 5914 } 5915 5916 /** 5917 * @brief Request an update of the connection parameter for a given LE connection 5918 * @param handle 5919 * @param conn_interval_min (unit: 1.25ms) 5920 * @param conn_interval_max (unit: 1.25ms) 5921 * @param conn_latency 5922 * @param supervision_timeout (unit: 10ms) 5923 * @returns 0 if ok 5924 */ 5925 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5926 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5927 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5928 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5929 connection->le_conn_interval_min = conn_interval_min; 5930 connection->le_conn_interval_max = conn_interval_max; 5931 connection->le_conn_latency = conn_latency; 5932 connection->le_supervision_timeout = supervision_timeout; 5933 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5934 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5935 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5936 return 0; 5937 } 5938 5939 #ifdef ENABLE_LE_PERIPHERAL 5940 5941 /** 5942 * @brief Set Advertisement Data 5943 * @param advertising_data_length 5944 * @param advertising_data (max 31 octets) 5945 * @note data is not copied, pointer has to stay valid 5946 */ 5947 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5948 hci_stack->le_advertisements_data_len = advertising_data_length; 5949 hci_stack->le_advertisements_data = advertising_data; 5950 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5951 hci_run(); 5952 } 5953 5954 /** 5955 * @brief Set Scan Response Data 5956 * @param advertising_data_length 5957 * @param advertising_data (max 31 octets) 5958 * @note data is not copied, pointer has to stay valid 5959 */ 5960 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5961 hci_stack->le_scan_response_data_len = scan_response_data_length; 5962 hci_stack->le_scan_response_data = scan_response_data; 5963 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5964 hci_run(); 5965 } 5966 5967 /** 5968 * @brief Set Advertisement Parameters 5969 * @param adv_int_min 5970 * @param adv_int_max 5971 * @param adv_type 5972 * @param direct_address_type 5973 * @param direct_address 5974 * @param channel_map 5975 * @param filter_policy 5976 * 5977 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5978 */ 5979 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5980 uint8_t direct_address_typ, bd_addr_t direct_address, 5981 uint8_t channel_map, uint8_t filter_policy) { 5982 5983 hci_stack->le_advertisements_interval_min = adv_int_min; 5984 hci_stack->le_advertisements_interval_max = adv_int_max; 5985 hci_stack->le_advertisements_type = adv_type; 5986 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5987 hci_stack->le_advertisements_channel_map = channel_map; 5988 hci_stack->le_advertisements_filter_policy = filter_policy; 5989 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5990 6); 5991 5992 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 5993 hci_run(); 5994 } 5995 5996 /** 5997 * @brief Enable/Disable Advertisements 5998 * @param enabled 5999 */ 6000 void gap_advertisements_enable(int enabled){ 6001 hci_stack->le_advertisements_enabled = enabled != 0; 6002 hci_update_advertisements_enabled_for_current_roles(); 6003 hci_run(); 6004 } 6005 6006 #endif 6007 6008 void hci_le_set_own_address_type(uint8_t own_address_type){ 6009 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6010 if (own_address_type == hci_stack->le_own_addr_type) return; 6011 hci_stack->le_own_addr_type = own_address_type; 6012 6013 #ifdef ENABLE_LE_PERIPHERAL 6014 // update advertisement parameters, too 6015 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6016 hci_run(); 6017 #endif 6018 #ifdef ENABLE_LE_CENTRAL 6019 // note: we don't update scan parameters or modify ongoing connection attempts 6020 #endif 6021 } 6022 6023 #endif 6024 6025 uint8_t gap_disconnect(hci_con_handle_t handle){ 6026 hci_connection_t * conn = hci_connection_for_handle(handle); 6027 if (!conn){ 6028 hci_emit_disconnection_complete(handle, 0); 6029 return 0; 6030 } 6031 // ignore if already disconnected 6032 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6033 return 0; 6034 } 6035 conn->state = SEND_DISCONNECT; 6036 hci_run(); 6037 return 0; 6038 } 6039 6040 int gap_read_rssi(hci_con_handle_t con_handle){ 6041 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6042 if (hci_connection == NULL) return 0; 6043 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6044 hci_run(); 6045 return 1; 6046 } 6047 6048 /** 6049 * @brief Get connection type 6050 * @param con_handle 6051 * @result connection_type 6052 */ 6053 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6054 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6055 if (!conn) return GAP_CONNECTION_INVALID; 6056 switch (conn->address_type){ 6057 case BD_ADDR_TYPE_LE_PUBLIC: 6058 case BD_ADDR_TYPE_LE_RANDOM: 6059 return GAP_CONNECTION_LE; 6060 case BD_ADDR_TYPE_SCO: 6061 return GAP_CONNECTION_SCO; 6062 case BD_ADDR_TYPE_ACL: 6063 return GAP_CONNECTION_ACL; 6064 default: 6065 return GAP_CONNECTION_INVALID; 6066 } 6067 } 6068 6069 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6070 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6071 if (!conn) return HCI_ROLE_INVALID; 6072 return (hci_role_t) conn->role; 6073 } 6074 6075 6076 #ifdef ENABLE_CLASSIC 6077 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6078 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6079 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6080 conn->request_role = role; 6081 hci_run(); 6082 return ERROR_CODE_SUCCESS; 6083 } 6084 #endif 6085 6086 #ifdef ENABLE_BLE 6087 6088 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){ 6089 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6090 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6091 6092 conn->le_phy_update_all_phys = all_phys; 6093 conn->le_phy_update_tx_phys = tx_phys; 6094 conn->le_phy_update_rx_phys = rx_phys; 6095 conn->le_phy_update_phy_options = phy_options; 6096 6097 hci_run(); 6098 6099 return 0; 6100 } 6101 6102 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6103 // check if already in list 6104 btstack_linked_list_iterator_t it; 6105 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6106 while (btstack_linked_list_iterator_has_next(&it)) { 6107 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6108 if (entry->address_type != address_type) { 6109 continue; 6110 } 6111 if (memcmp(entry->address, address, 6) != 0) { 6112 continue; 6113 } 6114 // disallow if already scheduled to add 6115 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6116 return ERROR_CODE_COMMAND_DISALLOWED; 6117 } 6118 // still on controller, but scheduled to remove -> re-add 6119 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6120 return ERROR_CODE_SUCCESS; 6121 } 6122 // alloc and add to list 6123 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6124 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6125 entry->address_type = address_type; 6126 (void)memcpy(entry->address, address, 6); 6127 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6128 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6129 return ERROR_CODE_SUCCESS; 6130 } 6131 6132 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6133 btstack_linked_list_iterator_t it; 6134 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6135 while (btstack_linked_list_iterator_has_next(&it)){ 6136 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6137 if (entry->address_type != address_type) { 6138 continue; 6139 } 6140 if (memcmp(entry->address, address, 6) != 0) { 6141 continue; 6142 } 6143 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6144 // remove from controller if already present 6145 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6146 } else { 6147 // directly remove entry from whitelist 6148 btstack_linked_list_iterator_remove(&it); 6149 btstack_memory_whitelist_entry_free(entry); 6150 } 6151 return ERROR_CODE_SUCCESS; 6152 } 6153 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6154 } 6155 6156 static void hci_whitelist_clear(void){ 6157 btstack_linked_list_iterator_t it; 6158 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6159 while (btstack_linked_list_iterator_has_next(&it)){ 6160 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6161 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6162 // remove from controller if already present 6163 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6164 continue; 6165 } 6166 // directly remove entry from whitelist 6167 btstack_linked_list_iterator_remove(&it); 6168 btstack_memory_whitelist_entry_free(entry); 6169 } 6170 } 6171 6172 /** 6173 * @brief Clear Whitelist 6174 * @returns 0 if ok 6175 */ 6176 uint8_t gap_whitelist_clear(void){ 6177 hci_whitelist_clear(); 6178 hci_run(); 6179 return ERROR_CODE_SUCCESS; 6180 } 6181 6182 /** 6183 * @brief Add Device to Whitelist 6184 * @param address_typ 6185 * @param address 6186 * @returns 0 if ok 6187 */ 6188 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6189 uint8_t status = hci_whitelist_add(address_type, address); 6190 if (status){ 6191 return status; 6192 } 6193 hci_run(); 6194 return ERROR_CODE_SUCCESS; 6195 } 6196 6197 /** 6198 * @brief Remove Device from Whitelist 6199 * @param address_typ 6200 * @param address 6201 * @returns 0 if ok 6202 */ 6203 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6204 uint8_t status = hci_whitelist_remove(address_type, address); 6205 if (status){ 6206 return status; 6207 } 6208 hci_run(); 6209 return ERROR_CODE_SUCCESS; 6210 } 6211 6212 #ifdef ENABLE_LE_CENTRAL 6213 /** 6214 * @brief Connect with Whitelist 6215 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6216 * @returns - if ok 6217 */ 6218 uint8_t gap_connect_with_whitelist(void){ 6219 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6220 return ERROR_CODE_COMMAND_DISALLOWED; 6221 } 6222 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6223 hci_run(); 6224 return ERROR_CODE_SUCCESS; 6225 } 6226 6227 /** 6228 * @brief Auto Connection Establishment - Start Connecting to device 6229 * @param address_typ 6230 * @param address 6231 * @returns 0 if ok 6232 */ 6233 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6234 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6235 return ERROR_CODE_COMMAND_DISALLOWED; 6236 } 6237 6238 uint8_t status = hci_whitelist_add(address_type, address); 6239 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6240 return status; 6241 } 6242 6243 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6244 6245 hci_run(); 6246 return ERROR_CODE_SUCCESS; 6247 } 6248 6249 /** 6250 * @brief Auto Connection Establishment - Stop Connecting to device 6251 * @param address_typ 6252 * @param address 6253 * @returns 0 if ok 6254 */ 6255 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6256 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6257 return ERROR_CODE_COMMAND_DISALLOWED; 6258 } 6259 6260 hci_whitelist_remove(address_type, address); 6261 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6262 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6263 } 6264 hci_run(); 6265 return 0; 6266 } 6267 6268 /** 6269 * @brief Auto Connection Establishment - Stop everything 6270 * @note Convenience function to stop all active auto connection attempts 6271 */ 6272 uint8_t gap_auto_connection_stop_all(void){ 6273 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6274 return ERROR_CODE_COMMAND_DISALLOWED; 6275 } 6276 hci_whitelist_clear(); 6277 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6278 hci_run(); 6279 return ERROR_CODE_SUCCESS; 6280 } 6281 6282 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6283 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6284 if (!conn) return 0; 6285 return conn->le_connection_interval; 6286 } 6287 #endif 6288 #endif 6289 6290 #ifdef ENABLE_CLASSIC 6291 /** 6292 * @brief Set Extended Inquiry Response data 6293 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6294 * @note has to be done before stack starts up 6295 */ 6296 void gap_set_extended_inquiry_response(const uint8_t * data){ 6297 hci_stack->eir_data = data; 6298 } 6299 6300 /** 6301 * @brief Start GAP Classic Inquiry 6302 * @param duration in 1.28s units 6303 * @return 0 if ok 6304 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6305 */ 6306 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6307 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6308 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6309 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6310 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6311 } 6312 hci_stack->inquiry_state = duration_in_1280ms_units; 6313 hci_run(); 6314 return 0; 6315 } 6316 6317 /** 6318 * @brief Stop GAP Classic Inquiry 6319 * @returns 0 if ok 6320 */ 6321 int gap_inquiry_stop(void){ 6322 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6323 // emit inquiry complete event, before it even started 6324 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6325 hci_emit_event(event, sizeof(event), 1); 6326 return 0; 6327 } 6328 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6329 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6330 hci_run(); 6331 return 0; 6332 } 6333 6334 void gap_inquiry_set_lap(uint32_t lap){ 6335 hci_stack->inquiry_lap = lap; 6336 } 6337 6338 6339 /** 6340 * @brief Remote Name Request 6341 * @param addr 6342 * @param page_scan_repetition_mode 6343 * @param clock_offset only used when bit 15 is set 6344 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6345 */ 6346 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6347 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6348 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6349 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6350 hci_stack->remote_name_clock_offset = clock_offset; 6351 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6352 hci_run(); 6353 return 0; 6354 } 6355 6356 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6357 hci_stack->gap_pairing_state = state; 6358 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6359 hci_run(); 6360 return 0; 6361 } 6362 6363 /** 6364 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6365 * @param addr 6366 * @param pin_data 6367 * @param pin_len 6368 * @return 0 if ok 6369 */ 6370 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6371 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6372 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6373 hci_stack->gap_pairing_pin_len = pin_len; 6374 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6375 } 6376 6377 /** 6378 * @brief Legacy Pairing Pin Code Response 6379 * @param addr 6380 * @param pin 6381 * @return 0 if ok 6382 */ 6383 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6384 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6385 } 6386 6387 /** 6388 * @brief Abort Legacy Pairing 6389 * @param addr 6390 * @param pin 6391 * @return 0 if ok 6392 */ 6393 int gap_pin_code_negative(bd_addr_t addr){ 6394 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6395 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6396 } 6397 6398 /** 6399 * @brief SSP Passkey Response 6400 * @param addr 6401 * @param passkey 6402 * @return 0 if ok 6403 */ 6404 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6405 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6406 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6407 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6408 } 6409 6410 /** 6411 * @brief Abort SSP Passkey Entry/Pairing 6412 * @param addr 6413 * @param pin 6414 * @return 0 if ok 6415 */ 6416 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6417 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6418 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6419 } 6420 6421 /** 6422 * @brief Accept SSP Numeric Comparison 6423 * @param addr 6424 * @param passkey 6425 * @return 0 if ok 6426 */ 6427 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6428 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6429 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6430 } 6431 6432 /** 6433 * @brief Abort SSP Numeric Comparison/Pairing 6434 * @param addr 6435 * @param pin 6436 * @return 0 if ok 6437 */ 6438 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6439 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6440 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6441 } 6442 6443 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6444 6445 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6446 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6447 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6448 connectionSetAuthenticationFlags(conn, flag); 6449 hci_run(); 6450 return ERROR_CODE_SUCCESS; 6451 } 6452 6453 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6454 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6455 } 6456 6457 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6458 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6459 } 6460 #endif 6461 6462 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6463 /** 6464 * @brief Report Remote OOB Data 6465 * @param bd_addr 6466 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6467 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6468 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6469 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6470 */ 6471 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){ 6472 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6473 if (connection == NULL) { 6474 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6475 } 6476 connection->classic_oob_c_192 = c_192; 6477 connection->classic_oob_r_192 = r_192; 6478 6479 // ignore P-256 if not supported by us 6480 if (hci_stack->secure_connections_active){ 6481 connection->classic_oob_c_256 = c_256; 6482 connection->classic_oob_r_256 = r_256; 6483 } 6484 6485 return ERROR_CODE_SUCCESS; 6486 } 6487 /** 6488 * @brief Generate new OOB data 6489 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6490 */ 6491 void gap_ssp_generate_oob_data(void){ 6492 hci_stack->classic_read_local_oob_data = true; 6493 hci_run(); 6494 } 6495 6496 #endif 6497 6498 /** 6499 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6500 * @param inquiry_mode see bluetooth_defines.h 6501 */ 6502 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6503 hci_stack->inquiry_mode = inquiry_mode; 6504 } 6505 6506 /** 6507 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6508 */ 6509 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6510 hci_stack->sco_voice_setting = voice_setting; 6511 } 6512 6513 /** 6514 * @brief Get SCO Voice Setting 6515 * @return current voice setting 6516 */ 6517 uint16_t hci_get_sco_voice_setting(void){ 6518 return hci_stack->sco_voice_setting; 6519 } 6520 6521 static int hci_have_usb_transport(void){ 6522 if (!hci_stack->hci_transport) return 0; 6523 const char * transport_name = hci_stack->hci_transport->name; 6524 if (!transport_name) return 0; 6525 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6526 } 6527 6528 /** @brief Get SCO packet length for current SCO Voice setting 6529 * @note Using SCO packets of the exact length is required for USB transfer 6530 * @return Length of SCO packets in bytes (not audio frames) 6531 */ 6532 uint16_t hci_get_sco_packet_length(void){ 6533 uint16_t sco_packet_length = 0; 6534 6535 #ifdef ENABLE_SCO_OVER_HCI 6536 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6537 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6538 6539 if (hci_have_usb_transport()){ 6540 // see Core Spec for H2 USB Transfer. 6541 // 3 byte SCO header + 24 bytes per connection 6542 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6543 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6544 } else { 6545 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6546 sco_packet_length = 3 + 60 * multiplier; 6547 // assert that it still fits inside an SCO buffer 6548 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6549 sco_packet_length = 3 + 60; 6550 } 6551 } 6552 #endif 6553 6554 #ifdef HAVE_SCO_TRANSPORT 6555 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6556 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6557 sco_packet_length = 3 + 60 * multiplier; 6558 #endif 6559 return sco_packet_length; 6560 } 6561 6562 /** 6563 * @brief Sets the master/slave policy 6564 * @param policy (0: attempt to become master, 1: let connecting device decide) 6565 */ 6566 void hci_set_master_slave_policy(uint8_t policy){ 6567 hci_stack->master_slave_policy = policy; 6568 } 6569 6570 #endif 6571 6572 HCI_STATE hci_get_state(void){ 6573 return hci_stack->state; 6574 } 6575 6576 #ifdef ENABLE_CLASSIC 6577 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6578 hci_stack->gap_classic_accept_callback = accept_callback; 6579 } 6580 #endif 6581 6582 /** 6583 * @brief Set callback for Bluetooth Hardware Error 6584 */ 6585 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6586 hci_stack->hardware_error_callback = fn; 6587 } 6588 6589 void hci_disconnect_all(void){ 6590 btstack_linked_list_iterator_t it; 6591 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6592 while (btstack_linked_list_iterator_has_next(&it)){ 6593 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6594 if (con->state == SENT_DISCONNECT) continue; 6595 con->state = SEND_DISCONNECT; 6596 } 6597 hci_run(); 6598 } 6599 6600 uint16_t hci_get_manufacturer(void){ 6601 return hci_stack->manufacturer; 6602 } 6603 6604 #ifdef ENABLE_BLE 6605 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6606 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6607 if (!hci_con) return NULL; 6608 return &hci_con->sm_connection; 6609 } 6610 6611 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6612 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6613 #endif 6614 6615 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6616 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6617 if (hci_connection == NULL) return 0; 6618 if (hci_is_le_connection(hci_connection)){ 6619 #ifdef ENABLE_BLE 6620 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6621 if (sm_conn->sm_connection_encrypted) { 6622 return sm_conn->sm_actual_encryption_key_size; 6623 } 6624 #endif 6625 } else { 6626 #ifdef ENABLE_CLASSIC 6627 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6628 return hci_connection->encryption_key_size; 6629 } 6630 #endif 6631 } 6632 return 0; 6633 } 6634 6635 int gap_authenticated(hci_con_handle_t con_handle){ 6636 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6637 if (hci_connection == NULL) return 0; 6638 6639 switch (hci_connection->address_type){ 6640 #ifdef ENABLE_BLE 6641 case BD_ADDR_TYPE_LE_PUBLIC: 6642 case BD_ADDR_TYPE_LE_RANDOM: 6643 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6644 return hci_connection->sm_connection.sm_connection_authenticated; 6645 #endif 6646 #ifdef ENABLE_CLASSIC 6647 case BD_ADDR_TYPE_SCO: 6648 case BD_ADDR_TYPE_ACL: 6649 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6650 #endif 6651 default: 6652 return 0; 6653 } 6654 } 6655 6656 int gap_secure_connection(hci_con_handle_t con_handle){ 6657 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6658 if (hci_connection == NULL) return 0; 6659 6660 switch (hci_connection->address_type){ 6661 #ifdef ENABLE_BLE 6662 case BD_ADDR_TYPE_LE_PUBLIC: 6663 case BD_ADDR_TYPE_LE_RANDOM: 6664 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6665 return hci_connection->sm_connection.sm_connection_sc; 6666 #endif 6667 #ifdef ENABLE_CLASSIC 6668 case BD_ADDR_TYPE_SCO: 6669 case BD_ADDR_TYPE_ACL: 6670 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6671 #endif 6672 default: 6673 return 0; 6674 } 6675 } 6676 6677 bool gap_bonded(hci_con_handle_t con_handle){ 6678 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6679 if (hci_connection == NULL) return 0; 6680 6681 #ifdef ENABLE_CLASSIC 6682 link_key_t link_key; 6683 link_key_type_t link_key_type; 6684 #endif 6685 switch (hci_connection->address_type){ 6686 #ifdef ENABLE_BLE 6687 case BD_ADDR_TYPE_LE_PUBLIC: 6688 case BD_ADDR_TYPE_LE_RANDOM: 6689 return hci_connection->sm_connection.sm_le_db_index >= 0; 6690 #endif 6691 #ifdef ENABLE_CLASSIC 6692 case BD_ADDR_TYPE_SCO: 6693 case BD_ADDR_TYPE_ACL: 6694 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6695 #endif 6696 default: 6697 return false; 6698 } 6699 } 6700 6701 #ifdef ENABLE_BLE 6702 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6703 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6704 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6705 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6706 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6707 return sm_conn->sm_connection_authorization_state; 6708 } 6709 #endif 6710 6711 #ifdef ENABLE_CLASSIC 6712 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){ 6713 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6714 if (!conn) return GAP_CONNECTION_INVALID; 6715 conn->sniff_min_interval = sniff_min_interval; 6716 conn->sniff_max_interval = sniff_max_interval; 6717 conn->sniff_attempt = sniff_attempt; 6718 conn->sniff_timeout = sniff_timeout; 6719 hci_run(); 6720 return 0; 6721 } 6722 6723 /** 6724 * @brief Exit Sniff mode 6725 * @param con_handle 6726 @ @return 0 if ok 6727 */ 6728 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6729 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6730 if (!conn) return GAP_CONNECTION_INVALID; 6731 conn->sniff_min_interval = 0xffff; 6732 hci_run(); 6733 return 0; 6734 } 6735 6736 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){ 6737 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6738 if (!conn) return GAP_CONNECTION_INVALID; 6739 conn->sniff_subrating_max_latency = max_latency; 6740 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6741 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6742 hci_run(); 6743 return ERROR_CODE_SUCCESS; 6744 } 6745 6746 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){ 6747 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6748 if (!conn) return GAP_CONNECTION_INVALID; 6749 conn->qos_service_type = service_type; 6750 conn->qos_token_rate = token_rate; 6751 conn->qos_peak_bandwidth = peak_bandwidth; 6752 conn->qos_latency = latency; 6753 conn->qos_delay_variation = delay_variation; 6754 hci_run(); 6755 return ERROR_CODE_SUCCESS; 6756 } 6757 6758 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6759 hci_stack->new_page_scan_interval = page_scan_interval; 6760 hci_stack->new_page_scan_window = page_scan_window; 6761 hci_run(); 6762 } 6763 6764 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6765 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6766 hci_run(); 6767 } 6768 6769 #endif 6770 6771 void hci_halting_defer(void){ 6772 if (hci_stack->state != HCI_STATE_HALTING) return; 6773 switch (hci_stack->substate){ 6774 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6775 case HCI_HALTING_CLOSE: 6776 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6777 break; 6778 default: 6779 break; 6780 } 6781 } 6782 6783 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6784 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6785 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6786 if (le_device_db_index >= le_device_db_max_count()) return; 6787 uint8_t offset = le_device_db_index >> 3; 6788 uint8_t mask = 1 << (le_device_db_index & 7); 6789 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6790 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6791 // note: go back to remove entries, otherwise, a remove + add will skip the add 6792 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6793 } 6794 } 6795 6796 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6797 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6798 if (le_device_db_index >= le_device_db_max_count()) return; 6799 uint8_t offset = le_device_db_index >> 3; 6800 uint8_t mask = 1 << (le_device_db_index & 7); 6801 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6802 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6803 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6804 } 6805 } 6806 6807 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6808 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6809 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6810 } 6811 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6812 // restart le resolving list update 6813 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6814 } 6815 return ERROR_CODE_SUCCESS; 6816 } 6817 #endif 6818 6819 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6820 void hci_setup_test_connections_fuzz(void){ 6821 hci_connection_t * conn; 6822 6823 // default address: 66:55:44:33:00:01 6824 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6825 6826 // setup Controller info 6827 hci_stack->num_cmd_packets = 255; 6828 hci_stack->acl_packets_total_num = 255; 6829 6830 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6831 addr[5] = 0x01; 6832 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6833 conn->con_handle = addr[5]; 6834 conn->role = HCI_ROLE_SLAVE; 6835 conn->state = RECEIVED_CONNECTION_REQUEST; 6836 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6837 6838 // setup incoming Classic SCO connection with con handle 0x0002 6839 addr[5] = 0x02; 6840 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6841 conn->con_handle = addr[5]; 6842 conn->role = HCI_ROLE_SLAVE; 6843 conn->state = RECEIVED_CONNECTION_REQUEST; 6844 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6845 6846 // setup ready Classic ACL connection with con handle 0x0003 6847 addr[5] = 0x03; 6848 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6849 conn->con_handle = addr[5]; 6850 conn->role = HCI_ROLE_SLAVE; 6851 conn->state = OPEN; 6852 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6853 6854 // setup ready Classic SCO connection with con handle 0x0004 6855 addr[5] = 0x04; 6856 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6857 conn->con_handle = addr[5]; 6858 conn->role = HCI_ROLE_SLAVE; 6859 conn->state = OPEN; 6860 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6861 6862 // setup ready LE ACL connection with con handle 0x005 and public address 6863 addr[5] = 0x05; 6864 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6865 conn->con_handle = addr[5]; 6866 conn->role = HCI_ROLE_SLAVE; 6867 conn->state = OPEN; 6868 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6869 conn->sm_connection.sm_connection_encrypted = 1; 6870 } 6871 6872 void hci_free_connections_fuzz(void){ 6873 btstack_linked_list_iterator_t it; 6874 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6875 while (btstack_linked_list_iterator_has_next(&it)){ 6876 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6877 btstack_linked_list_iterator_remove(&it); 6878 btstack_memory_hci_connection_free(con); 6879 } 6880 } 6881 void hci_simulate_working_fuzz(void){ 6882 hci_init_done(); 6883 hci_stack->num_cmd_packets = 255; 6884 } 6885 #endif 6886