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 #endif 2439 2440 static void event_handler(uint8_t *packet, uint16_t size){ 2441 2442 uint16_t event_length = packet[1]; 2443 2444 // assert packet is complete 2445 if (size != (event_length + 2u)){ 2446 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2447 return; 2448 } 2449 2450 bd_addr_type_t addr_type; 2451 hci_con_handle_t handle; 2452 hci_connection_t * conn; 2453 int i; 2454 int create_connection_cmd; 2455 2456 #ifdef ENABLE_CLASSIC 2457 hci_link_type_t link_type; 2458 bd_addr_t addr; 2459 #endif 2460 2461 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2462 2463 switch (hci_event_packet_get_type(packet)) { 2464 2465 case HCI_EVENT_COMMAND_COMPLETE: 2466 handle_command_complete_event(packet, size); 2467 break; 2468 2469 case HCI_EVENT_COMMAND_STATUS: 2470 // get num cmd packets - limit to 1 to reduce complexity 2471 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2472 2473 // check command status to detected failed outgoing connections 2474 create_connection_cmd = 0; 2475 #ifdef ENABLE_CLASSIC 2476 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2477 create_connection_cmd = 1; 2478 } 2479 #endif 2480 #ifdef ENABLE_LE_CENTRAL 2481 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2482 create_connection_cmd = 1; 2483 } 2484 #endif 2485 if (create_connection_cmd) { 2486 uint8_t status = hci_event_command_status_get_status(packet); 2487 addr_type = hci_stack->outgoing_addr_type; 2488 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2489 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); 2490 2491 // reset outgoing address info 2492 memset(hci_stack->outgoing_addr, 0, 6); 2493 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2494 2495 // on error 2496 if (status != ERROR_CODE_SUCCESS){ 2497 #ifdef ENABLE_LE_CENTRAL 2498 if (hci_is_le_connection_type(addr_type)){ 2499 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2500 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2501 } 2502 #endif 2503 // error => outgoing connection failed 2504 if (conn != NULL){ 2505 hci_handle_connection_failed(conn, status); 2506 } 2507 } 2508 } 2509 2510 #ifdef ENABLE_CLASSIC 2511 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2512 uint8_t status = hci_event_command_status_get_status(packet); 2513 log_info("command status (inquiry), status %x", status); 2514 if (status == ERROR_CODE_SUCCESS) { 2515 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2516 } else { 2517 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2518 } 2519 } 2520 #endif 2521 break; 2522 2523 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2524 if (size < 3) return; 2525 uint16_t num_handles = packet[2]; 2526 if (size != (3u + num_handles * 4u)) return; 2527 uint16_t offset = 3; 2528 for (i=0; i<num_handles;i++){ 2529 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2530 offset += 2u; 2531 uint16_t num_packets = little_endian_read_16(packet, offset); 2532 offset += 2u; 2533 2534 conn = hci_connection_for_handle(handle); 2535 if (!conn){ 2536 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2537 continue; 2538 } 2539 2540 if (conn->num_packets_sent >= num_packets){ 2541 conn->num_packets_sent -= num_packets; 2542 } else { 2543 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2544 conn->num_packets_sent = 0; 2545 } 2546 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2547 2548 #ifdef ENABLE_CLASSIC 2549 // For SCO, we do the can_send_now_check here 2550 hci_notify_if_sco_can_send_now(); 2551 #endif 2552 } 2553 break; 2554 } 2555 2556 #ifdef ENABLE_CLASSIC 2557 case HCI_EVENT_INQUIRY_COMPLETE: 2558 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2559 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2560 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2561 hci_emit_event(event, sizeof(event), 1); 2562 } 2563 break; 2564 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2565 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2566 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2567 } 2568 break; 2569 case HCI_EVENT_CONNECTION_REQUEST: 2570 reverse_bd_addr(&packet[2], addr); 2571 link_type = (hci_link_type_t) packet[11]; 2572 2573 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2574 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2575 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2576 bd_addr_copy(hci_stack->decline_addr, addr); 2577 break; 2578 } 2579 2580 if (hci_stack->gap_classic_accept_callback != NULL){ 2581 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2582 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2583 bd_addr_copy(hci_stack->decline_addr, addr); 2584 break; 2585 } 2586 } 2587 2588 // TODO: eval COD 8-10 2589 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2590 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2591 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2592 if (!conn) { 2593 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2594 } 2595 if (!conn) { 2596 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2597 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2598 bd_addr_copy(hci_stack->decline_addr, addr); 2599 break; 2600 } 2601 conn->role = HCI_ROLE_SLAVE; 2602 conn->state = RECEIVED_CONNECTION_REQUEST; 2603 // store info about eSCO 2604 if (link_type == HCI_LINK_TYPE_ESCO){ 2605 conn->remote_supported_features[0] |= 1; 2606 } 2607 hci_run(); 2608 break; 2609 2610 case HCI_EVENT_CONNECTION_COMPLETE: 2611 // Connection management 2612 reverse_bd_addr(&packet[5], addr); 2613 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2614 addr_type = BD_ADDR_TYPE_ACL; 2615 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2616 if (conn) { 2617 if (!packet[2]){ 2618 conn->state = OPEN; 2619 conn->con_handle = little_endian_read_16(packet, 3); 2620 2621 // queue get remote feature 2622 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2623 2624 // queue set supervision timeout if we're master 2625 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2626 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2627 } 2628 2629 // restart timer 2630 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2631 btstack_run_loop_add_timer(&conn->timeout); 2632 2633 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2634 2635 hci_emit_nr_connections_changed(); 2636 } else { 2637 // connection failed 2638 hci_handle_connection_failed(conn, packet[2]); 2639 } 2640 } 2641 break; 2642 2643 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2644 reverse_bd_addr(&packet[5], addr); 2645 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2646 if (packet[2]){ 2647 // connection failed 2648 break; 2649 } 2650 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2651 if (!conn) { 2652 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2653 } 2654 if (!conn) { 2655 break; 2656 } 2657 conn->state = OPEN; 2658 conn->con_handle = little_endian_read_16(packet, 3); 2659 2660 #ifdef ENABLE_SCO_OVER_HCI 2661 // update SCO 2662 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2663 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2664 } 2665 // trigger can send now 2666 if (hci_have_usb_transport()){ 2667 hci_stack->sco_can_send_now = true; 2668 } 2669 #endif 2670 #ifdef HAVE_SCO_TRANSPORT 2671 // configure sco transport 2672 if (hci_stack->sco_transport != NULL){ 2673 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2674 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2675 } 2676 #endif 2677 break; 2678 2679 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2680 handle = little_endian_read_16(packet, 3); 2681 conn = hci_connection_for_handle(handle); 2682 if (!conn) break; 2683 if (!packet[2]){ 2684 const uint8_t * features = &packet[5]; 2685 hci_handle_remote_features_page_0(conn, features); 2686 2687 // read extended features if possible 2688 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2689 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2690 break; 2691 } 2692 } 2693 hci_handle_remote_features_received(conn); 2694 break; 2695 2696 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2697 handle = little_endian_read_16(packet, 3); 2698 conn = hci_connection_for_handle(handle); 2699 if (!conn) break; 2700 // status = ok, page = 1 2701 if (!packet[2]) { 2702 uint8_t page_number = packet[5]; 2703 uint8_t maximum_page_number = packet[6]; 2704 const uint8_t * features = &packet[7]; 2705 bool done = false; 2706 switch (page_number){ 2707 case 1: 2708 hci_handle_remote_features_page_1(conn, features); 2709 if (maximum_page_number >= 2){ 2710 // get Secure Connections (Controller) from Page 2 if available 2711 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2712 } else { 2713 // otherwise, assume SC (Controller) == SC (Host) 2714 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2715 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2716 } 2717 done = true; 2718 } 2719 break; 2720 case 2: 2721 hci_handle_remote_features_page_2(conn, features); 2722 done = true; 2723 break; 2724 default: 2725 break; 2726 } 2727 if (!done) break; 2728 } 2729 hci_handle_remote_features_received(conn); 2730 break; 2731 2732 case HCI_EVENT_LINK_KEY_REQUEST: 2733 // request handled by hci_run() 2734 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 2735 break; 2736 2737 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2738 hci_event_link_key_request_get_bd_addr(packet, addr); 2739 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2740 if (!conn) break; 2741 2742 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2743 2744 // CVE-2020-26555: ignore NULL link key 2745 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2746 if (btstack_is_null(&packet[8], 16)) break; 2747 2748 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2749 // Change Connection Encryption keeps link key type 2750 if (link_key_type != CHANGED_COMBINATION_KEY){ 2751 conn->link_key_type = link_key_type; 2752 } 2753 2754 // cache link key. link keys stored in little-endian format for legacy reasons 2755 memcpy(&conn->link_key, &packet[8], 16); 2756 2757 // only store link key: 2758 // - if bondable enabled 2759 if (hci_stack->bondable == false) break; 2760 // - if security level sufficient 2761 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2762 // - for SSP, also check if remote side requested bonding as well 2763 if (conn->link_key_type != COMBINATION_KEY){ 2764 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2765 if (!remote_bonding){ 2766 break; 2767 } 2768 } 2769 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2770 break; 2771 } 2772 2773 case HCI_EVENT_PIN_CODE_REQUEST: 2774 hci_event_pin_code_request_get_bd_addr(packet, addr); 2775 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2776 if (!conn) break; 2777 2778 hci_pairing_started(conn, false); 2779 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2780 if (!hci_stack->bondable ){ 2781 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2782 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2783 hci_run(); 2784 return; 2785 } 2786 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2787 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2788 log_info("Level 4 required, but SC not supported -> abort"); 2789 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2790 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2791 hci_run(); 2792 return; 2793 } 2794 break; 2795 2796 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2797 hci_event_io_capability_response_get_bd_addr(packet, addr); 2798 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2799 if (!conn) break; 2800 2801 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2802 hci_pairing_started(conn, true); 2803 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2804 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2805 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2806 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2807 #endif 2808 break; 2809 2810 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2811 hci_event_io_capability_response_get_bd_addr(packet, addr); 2812 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2813 if (!conn) break; 2814 2815 hci_connection_timestamp(conn); 2816 2817 hci_pairing_started(conn, true); 2818 2819 // assess security: LEVEL 4 requires SC 2820 if ((hci_stack->gap_secure_connections_only_mode || (conn->requested_security_level == LEVEL_4)) && !hci_remote_sc_enabled(conn)){ 2821 log_info("Level 4 required, but SC not supported -> abort"); 2822 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2823 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2824 break; 2825 } 2826 2827 // assess security based on io capabilities 2828 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2829 // get requested security level 2830 gap_security_level_t requested_security_level = conn->requested_security_level; 2831 if (hci_stack->gap_secure_connections_only_mode){ 2832 requested_security_level = LEVEL_4; 2833 } 2834 2835 // responder: fully validate io caps of both sides as well as OOB data 2836 bool security_possible = false; 2837 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2838 2839 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2840 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2841 // so we merge the OOB data availability 2842 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2843 if (conn->classic_oob_c_192 != NULL){ 2844 have_oob_data |= 1; 2845 } 2846 if (conn->classic_oob_c_256 != NULL){ 2847 have_oob_data |= 2; 2848 } 2849 // for up to Level 3, either P-192 as well as P-256 will do 2850 // 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 2851 // if remote does not SC, we should not receive P-256 data either 2852 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2853 security_possible = true; 2854 } 2855 // for Level 4, P-256 is needed 2856 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2857 security_possible = true; 2858 } 2859 #endif 2860 2861 if (security_possible == false){ 2862 log_info("IOCap/OOB insufficient for level %u -> abort", conn->requested_security_level); 2863 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2864 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2865 break; 2866 } 2867 } else { 2868 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2869 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2870 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2871 log_info("Level 3+ required, but no input/output -> abort"); 2872 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2873 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2874 break; 2875 } 2876 #endif 2877 } 2878 2879 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2880 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2881 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2882 } else { 2883 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2884 } 2885 #endif 2886 break; 2887 2888 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2889 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2890 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2891 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2892 if (!conn) break; 2893 2894 hci_connection_timestamp(conn); 2895 2896 hci_pairing_started(conn, true); 2897 2898 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2899 break; 2900 #endif 2901 2902 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2903 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2904 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2905 if (!conn) break; 2906 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2907 if (hci_stack->ssp_auto_accept){ 2908 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2909 }; 2910 } else { 2911 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2912 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2913 // don't forward event to app 2914 hci_run(); 2915 return; 2916 } 2917 break; 2918 2919 case HCI_EVENT_USER_PASSKEY_REQUEST: 2920 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2921 if (hci_stack->ssp_auto_accept){ 2922 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2923 }; 2924 break; 2925 2926 case HCI_EVENT_MODE_CHANGE: 2927 handle = hci_event_mode_change_get_handle(packet); 2928 conn = hci_connection_for_handle(handle); 2929 if (!conn) break; 2930 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2931 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2932 break; 2933 #endif 2934 2935 case HCI_EVENT_ENCRYPTION_CHANGE: 2936 handle = hci_event_encryption_change_get_connection_handle(packet); 2937 conn = hci_connection_for_handle(handle); 2938 if (!conn) break; 2939 if (hci_event_encryption_change_get_status(packet) == 0u) { 2940 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2941 if (encryption_enabled){ 2942 if (hci_is_le_connection(conn)){ 2943 // For LE, we accept connection as encrypted 2944 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2945 } 2946 #ifdef ENABLE_CLASSIC 2947 else { 2948 2949 // dedicated bonding: send result and disconnect 2950 if (conn->bonding_flags & BONDING_DEDICATED){ 2951 conn->bonding_flags &= ~BONDING_DEDICATED; 2952 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2953 conn->bonding_status = packet[2]; 2954 break; 2955 } 2956 2957 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2958 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2959 bool connected_uses_aes_ccm = encryption_enabled == 2; 2960 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2961 log_info("SC during pairing, but only E0 now -> abort"); 2962 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2963 break; 2964 } 2965 2966 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2967 if (connected_uses_aes_ccm){ 2968 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2969 } 2970 2971 #ifdef ENABLE_TESTING_SUPPORT 2972 // work around for issue with PTS dongle 2973 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2974 #endif 2975 2976 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2977 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2978 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2979 } else { 2980 // if not, pretend everything is perfect 2981 hci_handle_read_encryption_key_size_complete(conn, 16); 2982 } 2983 } 2984 #endif 2985 } else { 2986 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 2987 } 2988 } 2989 2990 break; 2991 2992 #ifdef ENABLE_CLASSIC 2993 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2994 handle = hci_event_authentication_complete_get_connection_handle(packet); 2995 conn = hci_connection_for_handle(handle); 2996 if (!conn) break; 2997 2998 // clear authentication active flag 2999 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3000 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3001 3002 // authenticated only if auth status == 0 3003 if (hci_event_authentication_complete_get_status(packet) == 0){ 3004 // authenticated 3005 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3006 3007 // If not already encrypted, start encryption 3008 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3009 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3010 break; 3011 } 3012 } 3013 3014 // emit updated security level 3015 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3016 break; 3017 3018 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3019 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3020 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3021 if (!conn) break; 3022 3023 // treat successfully paired connection as authenticated 3024 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3025 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3026 } 3027 3028 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3029 break; 3030 #endif 3031 3032 // HCI_EVENT_DISCONNECTION_COMPLETE 3033 // has been split, to first notify stack before shutting connection down 3034 // see end of function, too. 3035 case HCI_EVENT_DISCONNECTION_COMPLETE: 3036 if (packet[2]) break; // status != 0 3037 handle = little_endian_read_16(packet, 3); 3038 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3039 if (hci_stack->acl_fragmentation_total_size > 0u) { 3040 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3041 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3042 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3043 hci_stack->acl_fragmentation_total_size = 0; 3044 hci_stack->acl_fragmentation_pos = 0; 3045 if (release_buffer){ 3046 hci_release_packet_buffer(); 3047 } 3048 } 3049 } 3050 3051 conn = hci_connection_for_handle(handle); 3052 if (!conn) break; 3053 #ifdef ENABLE_CLASSIC 3054 // pairing failed if it was ongoing 3055 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3056 #endif 3057 // mark connection for shutdown 3058 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3059 3060 // emit dedicatd bonding event 3061 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3062 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3063 } 3064 3065 #ifdef ENABLE_BLE 3066 #ifdef ENABLE_LE_PERIPHERAL 3067 // re-enable advertisements for le connections if active 3068 if (hci_is_le_connection(conn)){ 3069 hci_update_advertisements_enabled_for_current_roles(); 3070 } 3071 #endif 3072 #endif 3073 break; 3074 3075 case HCI_EVENT_HARDWARE_ERROR: 3076 log_error("Hardware Error: 0x%02x", packet[2]); 3077 if (hci_stack->hardware_error_callback){ 3078 (*hci_stack->hardware_error_callback)(packet[2]); 3079 } else { 3080 // if no special requests, just reboot stack 3081 hci_power_control_off(); 3082 hci_power_control_on(); 3083 } 3084 break; 3085 3086 #ifdef ENABLE_CLASSIC 3087 case HCI_EVENT_ROLE_CHANGE: 3088 if (packet[2]) break; // status != 0 3089 reverse_bd_addr(&packet[3], addr); 3090 addr_type = BD_ADDR_TYPE_ACL; 3091 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3092 if (!conn) break; 3093 conn->role = packet[9]; 3094 break; 3095 #endif 3096 3097 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3098 // release packet buffer only for asynchronous transport and if there are not further fragements 3099 if (hci_transport_synchronous()) { 3100 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3101 return; // instead of break: to avoid re-entering hci_run() 3102 } 3103 hci_stack->acl_fragmentation_tx_active = 0; 3104 if (hci_stack->acl_fragmentation_total_size) break; 3105 hci_release_packet_buffer(); 3106 3107 // L2CAP receives this event via the hci_emit_event below 3108 3109 #ifdef ENABLE_CLASSIC 3110 // For SCO, we do the can_send_now_check here 3111 hci_notify_if_sco_can_send_now(); 3112 #endif 3113 break; 3114 3115 #ifdef ENABLE_CLASSIC 3116 case HCI_EVENT_SCO_CAN_SEND_NOW: 3117 // For SCO, we do the can_send_now_check here 3118 hci_stack->sco_can_send_now = true; 3119 hci_notify_if_sco_can_send_now(); 3120 return; 3121 3122 // explode inquriy results for easier consumption 3123 case HCI_EVENT_INQUIRY_RESULT: 3124 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3125 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3126 gap_inquiry_explode(packet, size); 3127 break; 3128 #endif 3129 3130 #ifdef ENABLE_BLE 3131 case HCI_EVENT_LE_META: 3132 switch (packet[2]){ 3133 #ifdef ENABLE_LE_CENTRAL 3134 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3135 // log_info("advertising report received"); 3136 if (!hci_stack->le_scanning_enabled) break; 3137 le_handle_advertisement_report(packet, size); 3138 break; 3139 #endif 3140 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3141 event_handle_le_connection_complete(packet); 3142 break; 3143 3144 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3145 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3146 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3147 conn = hci_connection_for_handle(handle); 3148 if (!conn) break; 3149 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3150 break; 3151 3152 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3153 // connection 3154 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3155 conn = hci_connection_for_handle(handle); 3156 if (conn) { 3157 // read arguments 3158 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3159 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3160 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3161 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3162 3163 // validate against current connection parameter range 3164 le_connection_parameter_range_t existing_range; 3165 gap_get_connection_parameter_range(&existing_range); 3166 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3167 if (update_parameter){ 3168 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3169 conn->le_conn_interval_min = le_conn_interval_min; 3170 conn->le_conn_interval_max = le_conn_interval_max; 3171 conn->le_conn_latency = le_conn_latency; 3172 conn->le_supervision_timeout = le_supervision_timeout; 3173 } else { 3174 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3175 } 3176 } 3177 break; 3178 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3179 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3180 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3181 conn = hci_connection_for_handle(handle); 3182 if (conn) { 3183 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3184 } 3185 break; 3186 #endif 3187 default: 3188 break; 3189 } 3190 break; 3191 #endif 3192 case HCI_EVENT_VENDOR_SPECIFIC: 3193 // Vendor specific commands often create vendor specific event instead of num completed packets 3194 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3195 switch (hci_stack->manufacturer){ 3196 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3197 hci_stack->num_cmd_packets = 1; 3198 break; 3199 default: 3200 break; 3201 } 3202 break; 3203 default: 3204 break; 3205 } 3206 3207 handle_event_for_current_stack_state(packet, size); 3208 3209 // notify upper stack 3210 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3211 3212 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3213 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3214 handle = little_endian_read_16(packet, 3); 3215 hci_connection_t * aConn = hci_connection_for_handle(handle); 3216 // discard connection if app did not trigger a reconnect in the event handler 3217 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3218 hci_shutdown_connection(aConn); 3219 } 3220 } 3221 3222 // execute main loop 3223 hci_run(); 3224 } 3225 3226 #ifdef ENABLE_CLASSIC 3227 3228 #ifdef ENABLE_SCO_OVER_HCI 3229 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3230 static void sco_schedule_tx(hci_connection_t * conn); 3231 3232 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3233 log_debug("SCO TX Timeout"); 3234 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3235 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3236 if (!conn) return; 3237 3238 // trigger send 3239 conn->sco_tx_ready = 1; 3240 // extra packet if CVSD but SCO buffer is too short 3241 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3242 conn->sco_tx_ready++; 3243 } 3244 hci_notify_if_sco_can_send_now(); 3245 } 3246 3247 3248 #define SCO_TX_AFTER_RX_MS (6) 3249 3250 static void sco_schedule_tx(hci_connection_t * conn){ 3251 3252 uint32_t now = btstack_run_loop_get_time_ms(); 3253 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3254 int time_delta_ms = sco_tx_ms - now; 3255 3256 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3257 3258 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3259 btstack_run_loop_remove_timer(timer); 3260 btstack_run_loop_set_timer(timer, time_delta_ms); 3261 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3262 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3263 btstack_run_loop_add_timer(timer); 3264 } 3265 #endif 3266 3267 static void sco_handler(uint8_t * packet, uint16_t size){ 3268 // lookup connection struct 3269 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3270 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3271 if (!conn) return; 3272 3273 #ifdef ENABLE_SCO_OVER_HCI 3274 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3275 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3276 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3277 packet[2] = 0x3c; 3278 memmove(&packet[3], &packet[23], 63); 3279 size = 63; 3280 } 3281 } 3282 3283 if (hci_have_usb_transport()){ 3284 // Nothing to do 3285 } else { 3286 // 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); 3287 if (hci_stack->synchronous_flow_control_enabled == 0){ 3288 uint32_t now = btstack_run_loop_get_time_ms(); 3289 3290 if (!conn->sco_rx_valid){ 3291 // ignore first 10 packets 3292 conn->sco_rx_count++; 3293 // log_debug("sco rx count %u", conn->sco_rx_count); 3294 if (conn->sco_rx_count == 10) { 3295 // use first timestamp as is and pretent it just started 3296 conn->sco_rx_ms = now; 3297 conn->sco_rx_valid = 1; 3298 conn->sco_rx_count = 0; 3299 sco_schedule_tx(conn); 3300 } 3301 } else { 3302 // track expected arrival timme 3303 conn->sco_rx_count++; 3304 conn->sco_rx_ms += 7; 3305 int delta = (int32_t) (now - conn->sco_rx_ms); 3306 if (delta > 0){ 3307 conn->sco_rx_ms++; 3308 } 3309 // log_debug("sco rx %u", conn->sco_rx_ms); 3310 sco_schedule_tx(conn); 3311 } 3312 } 3313 } 3314 #endif 3315 3316 // deliver to app 3317 if (hci_stack->sco_packet_handler) { 3318 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3319 } 3320 3321 #ifdef HAVE_SCO_TRANSPORT 3322 // We can send one packet for each received packet 3323 conn->sco_tx_ready++; 3324 hci_notify_if_sco_can_send_now(); 3325 #endif 3326 3327 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3328 conn->num_packets_completed++; 3329 hci_stack->host_completed_packets = 1; 3330 hci_run(); 3331 #endif 3332 } 3333 #endif 3334 3335 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3336 hci_dump_packet(packet_type, 1, packet, size); 3337 switch (packet_type) { 3338 case HCI_EVENT_PACKET: 3339 event_handler(packet, size); 3340 break; 3341 case HCI_ACL_DATA_PACKET: 3342 acl_handler(packet, size); 3343 break; 3344 #ifdef ENABLE_CLASSIC 3345 case HCI_SCO_DATA_PACKET: 3346 sco_handler(packet, size); 3347 break; 3348 #endif 3349 default: 3350 break; 3351 } 3352 } 3353 3354 /** 3355 * @brief Add event packet handler. 3356 */ 3357 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3358 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3359 } 3360 3361 3362 /** Register HCI packet handlers */ 3363 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3364 hci_stack->acl_packet_handler = handler; 3365 } 3366 3367 #ifdef ENABLE_CLASSIC 3368 /** 3369 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3370 */ 3371 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3372 hci_stack->sco_packet_handler = handler; 3373 } 3374 #endif 3375 3376 static void hci_state_reset(void){ 3377 // no connections yet 3378 hci_stack->connections = NULL; 3379 3380 // keep discoverable/connectable as this has been requested by the client(s) 3381 // hci_stack->discoverable = 0; 3382 // hci_stack->connectable = 0; 3383 // hci_stack->bondable = 1; 3384 // hci_stack->own_addr_type = 0; 3385 3386 // buffer is free 3387 hci_stack->hci_packet_buffer_reserved = false; 3388 3389 // no pending cmds 3390 hci_stack->decline_reason = 0; 3391 hci_stack->new_scan_enable_value = 0xff; 3392 3393 hci_stack->secure_connections_active = false; 3394 3395 #ifdef ENABLE_CLASSIC 3396 hci_stack->new_page_scan_interval = 0xffff; 3397 hci_stack->new_page_scan_window = 0xffff; 3398 hci_stack->new_page_scan_type = 0xff; 3399 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3400 #endif 3401 3402 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3403 hci_stack->classic_read_local_oob_data = true; 3404 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3405 #endif 3406 3407 // LE 3408 #ifdef ENABLE_BLE 3409 memset(hci_stack->le_random_address, 0, 6); 3410 hci_stack->le_random_address_set = 0; 3411 #endif 3412 #ifdef ENABLE_LE_CENTRAL 3413 hci_stack->le_scanning_active = false; 3414 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3415 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3416 hci_stack->le_whitelist_capacity = 0; 3417 #endif 3418 #ifdef ENABLE_LE_PERIPHERAL 3419 hci_stack->le_advertisements_active = false; 3420 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3421 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3422 } 3423 if (hci_stack->le_advertisements_data != NULL){ 3424 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3425 } 3426 #endif 3427 } 3428 3429 #ifdef ENABLE_CLASSIC 3430 /** 3431 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3432 */ 3433 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3434 // store and open remote device db 3435 hci_stack->link_key_db = link_key_db; 3436 if (hci_stack->link_key_db) { 3437 hci_stack->link_key_db->open(); 3438 } 3439 } 3440 #endif 3441 3442 void hci_init(const hci_transport_t *transport, const void *config){ 3443 3444 #ifdef HAVE_MALLOC 3445 if (!hci_stack) { 3446 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3447 } 3448 #else 3449 hci_stack = &hci_stack_static; 3450 #endif 3451 memset(hci_stack, 0, sizeof(hci_stack_t)); 3452 3453 // reference to use transport layer implementation 3454 hci_stack->hci_transport = transport; 3455 3456 // reference to used config 3457 hci_stack->config = config; 3458 3459 // setup pointer for outgoing packet buffer 3460 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3461 3462 // max acl payload size defined in config.h 3463 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3464 3465 // register packet handlers with transport 3466 transport->register_packet_handler(&packet_handler); 3467 3468 hci_stack->state = HCI_STATE_OFF; 3469 3470 // class of device 3471 hci_stack->class_of_device = 0x007a020c; // Smartphone 3472 3473 // bondable by default 3474 hci_stack->bondable = 1; 3475 3476 #ifdef ENABLE_CLASSIC 3477 // classic name 3478 hci_stack->local_name = default_classic_name; 3479 3480 // Master slave policy 3481 hci_stack->master_slave_policy = 1; 3482 3483 // Allow Role Switch 3484 hci_stack->allow_role_switch = 1; 3485 3486 // Default / minimum security level = 2 3487 hci_stack->gap_security_level = LEVEL_2; 3488 3489 // Default Security Mode 4 3490 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3491 3492 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3493 hci_stack->gap_required_encyrption_key_size = 7; 3494 3495 // Link Supervision Timeout 3496 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3497 3498 #endif 3499 3500 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3501 hci_stack->ssp_enable = 1; 3502 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3503 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3504 hci_stack->ssp_auto_accept = 1; 3505 3506 // Secure Connections: enable (requires support from Controller) 3507 hci_stack->secure_connections_enable = true; 3508 3509 // voice setting - signed 16 bit pcm data with CVSD over the air 3510 hci_stack->sco_voice_setting = 0x60; 3511 3512 #ifdef ENABLE_LE_CENTRAL 3513 // connection parameter to use for outgoing connections 3514 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3515 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3516 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3517 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3518 hci_stack->le_connection_latency = 4; // 4 3519 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3520 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3521 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3522 3523 // default LE Scanning 3524 hci_stack->le_scan_type = 0x1; // active 3525 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3526 hci_stack->le_scan_window = 0x30; // 30 ms 3527 #endif 3528 3529 #ifdef ENABLE_LE_PERIPHERAL 3530 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3531 #endif 3532 3533 // connection parameter range used to answer connection parameter update requests in l2cap 3534 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3535 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3536 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3537 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3538 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3539 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3540 3541 hci_state_reset(); 3542 } 3543 3544 void hci_deinit(void){ 3545 #ifdef HAVE_MALLOC 3546 if (hci_stack) { 3547 free(hci_stack); 3548 } 3549 #endif 3550 hci_stack = NULL; 3551 3552 #ifdef ENABLE_CLASSIC 3553 disable_l2cap_timeouts = 0; 3554 #endif 3555 } 3556 3557 /** 3558 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3559 */ 3560 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3561 hci_stack->chipset = chipset_driver; 3562 3563 // reset chipset driver - init is also called on power_up 3564 if (hci_stack->chipset && hci_stack->chipset->init){ 3565 hci_stack->chipset->init(hci_stack->config); 3566 } 3567 } 3568 3569 /** 3570 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3571 */ 3572 void hci_set_control(const btstack_control_t *hardware_control){ 3573 // references to used control implementation 3574 hci_stack->control = hardware_control; 3575 // init with transport config 3576 hardware_control->init(hci_stack->config); 3577 } 3578 3579 void hci_close(void){ 3580 3581 #ifdef ENABLE_CLASSIC 3582 // close remote device db 3583 if (hci_stack->link_key_db) { 3584 hci_stack->link_key_db->close(); 3585 } 3586 #endif 3587 3588 btstack_linked_list_iterator_t lit; 3589 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3590 while (btstack_linked_list_iterator_has_next(&lit)){ 3591 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3592 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3593 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3594 hci_shutdown_connection(connection); 3595 } 3596 3597 hci_power_control(HCI_POWER_OFF); 3598 3599 #ifdef HAVE_MALLOC 3600 free(hci_stack); 3601 #endif 3602 hci_stack = NULL; 3603 } 3604 3605 #ifdef HAVE_SCO_TRANSPORT 3606 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3607 hci_stack->sco_transport = sco_transport; 3608 sco_transport->register_packet_handler(&packet_handler); 3609 } 3610 #endif 3611 3612 #ifdef ENABLE_CLASSIC 3613 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3614 // validate ranage and set 3615 if (encryption_key_size < 7) return; 3616 if (encryption_key_size > 16) return; 3617 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3618 } 3619 3620 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3621 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3622 hci_stack->gap_security_mode = security_mode; 3623 return ERROR_CODE_SUCCESS; 3624 } else { 3625 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3626 } 3627 } 3628 3629 gap_security_mode_t gap_get_security_mode(void){ 3630 return hci_stack->gap_security_mode; 3631 } 3632 3633 void gap_set_security_level(gap_security_level_t security_level){ 3634 hci_stack->gap_security_level = security_level; 3635 } 3636 3637 gap_security_level_t gap_get_security_level(void){ 3638 if (hci_stack->gap_secure_connections_only_mode){ 3639 return LEVEL_4; 3640 } 3641 return hci_stack->gap_security_level; 3642 } 3643 3644 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3645 hci_stack->gap_minimal_service_security_level = security_level; 3646 } 3647 3648 void gap_set_secure_connections_only_mode(bool enable){ 3649 hci_stack->gap_secure_connections_only_mode = enable; 3650 } 3651 3652 bool gap_get_secure_connections_only_mode(void){ 3653 return hci_stack->gap_secure_connections_only_mode; 3654 } 3655 #endif 3656 3657 #ifdef ENABLE_CLASSIC 3658 void gap_set_class_of_device(uint32_t class_of_device){ 3659 hci_stack->class_of_device = class_of_device; 3660 } 3661 3662 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3663 hci_stack->default_link_policy_settings = default_link_policy_settings; 3664 } 3665 3666 void gap_set_allow_role_switch(bool allow_role_switch){ 3667 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3668 } 3669 3670 uint8_t hci_get_allow_role_switch(void){ 3671 return hci_stack->allow_role_switch; 3672 } 3673 3674 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3675 hci_stack->link_supervision_timeout = link_supervision_timeout; 3676 } 3677 3678 void hci_disable_l2cap_timeout_check(void){ 3679 disable_l2cap_timeouts = 1; 3680 } 3681 #endif 3682 3683 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3684 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3685 void hci_set_bd_addr(bd_addr_t addr){ 3686 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3687 hci_stack->custom_bd_addr_set = 1; 3688 } 3689 #endif 3690 3691 // State-Module-Driver overview 3692 // state module low-level 3693 // HCI_STATE_OFF off close 3694 // HCI_STATE_INITIALIZING, on open 3695 // HCI_STATE_WORKING, on open 3696 // HCI_STATE_HALTING, on open 3697 // HCI_STATE_SLEEPING, off/sleep close 3698 // HCI_STATE_FALLING_ASLEEP on open 3699 3700 static int hci_power_control_on(void){ 3701 3702 // power on 3703 int err = 0; 3704 if (hci_stack->control && hci_stack->control->on){ 3705 err = (*hci_stack->control->on)(); 3706 } 3707 if (err){ 3708 log_error( "POWER_ON failed"); 3709 hci_emit_hci_open_failed(); 3710 return err; 3711 } 3712 3713 // int chipset driver 3714 if (hci_stack->chipset && hci_stack->chipset->init){ 3715 hci_stack->chipset->init(hci_stack->config); 3716 } 3717 3718 // init transport 3719 if (hci_stack->hci_transport->init){ 3720 hci_stack->hci_transport->init(hci_stack->config); 3721 } 3722 3723 // open transport 3724 err = hci_stack->hci_transport->open(); 3725 if (err){ 3726 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3727 if (hci_stack->control && hci_stack->control->off){ 3728 (*hci_stack->control->off)(); 3729 } 3730 hci_emit_hci_open_failed(); 3731 return err; 3732 } 3733 return 0; 3734 } 3735 3736 static void hci_power_control_off(void){ 3737 3738 log_info("hci_power_control_off"); 3739 3740 // close low-level device 3741 hci_stack->hci_transport->close(); 3742 3743 log_info("hci_power_control_off - hci_transport closed"); 3744 3745 // power off 3746 if (hci_stack->control && hci_stack->control->off){ 3747 (*hci_stack->control->off)(); 3748 } 3749 3750 log_info("hci_power_control_off - control closed"); 3751 3752 hci_stack->state = HCI_STATE_OFF; 3753 } 3754 3755 static void hci_power_control_sleep(void){ 3756 3757 log_info("hci_power_control_sleep"); 3758 3759 #if 0 3760 // don't close serial port during sleep 3761 3762 // close low-level device 3763 hci_stack->hci_transport->close(hci_stack->config); 3764 #endif 3765 3766 // sleep mode 3767 if (hci_stack->control && hci_stack->control->sleep){ 3768 (*hci_stack->control->sleep)(); 3769 } 3770 3771 hci_stack->state = HCI_STATE_SLEEPING; 3772 } 3773 3774 static int hci_power_control_wake(void){ 3775 3776 log_info("hci_power_control_wake"); 3777 3778 // wake on 3779 if (hci_stack->control && hci_stack->control->wake){ 3780 (*hci_stack->control->wake)(); 3781 } 3782 3783 #if 0 3784 // open low-level device 3785 int err = hci_stack->hci_transport->open(hci_stack->config); 3786 if (err){ 3787 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3788 if (hci_stack->control && hci_stack->control->off){ 3789 (*hci_stack->control->off)(); 3790 } 3791 hci_emit_hci_open_failed(); 3792 return err; 3793 } 3794 #endif 3795 3796 return 0; 3797 } 3798 3799 static void hci_power_transition_to_initializing(void){ 3800 // set up state machine 3801 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3802 hci_stack->hci_packet_buffer_reserved = false; 3803 hci_stack->state = HCI_STATE_INITIALIZING; 3804 hci_stack->substate = HCI_INIT_SEND_RESET; 3805 } 3806 3807 // returns error 3808 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3809 int err; 3810 switch (power_mode){ 3811 case HCI_POWER_ON: 3812 err = hci_power_control_on(); 3813 if (err != 0) { 3814 log_error("hci_power_control_on() error %d", err); 3815 return err; 3816 } 3817 hci_power_transition_to_initializing(); 3818 break; 3819 case HCI_POWER_OFF: 3820 // do nothing 3821 break; 3822 case HCI_POWER_SLEEP: 3823 // do nothing (with SLEEP == OFF) 3824 break; 3825 default: 3826 btstack_assert(false); 3827 break; 3828 } 3829 return ERROR_CODE_SUCCESS; 3830 } 3831 3832 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3833 switch (power_mode){ 3834 case HCI_POWER_ON: 3835 // do nothing 3836 break; 3837 case HCI_POWER_OFF: 3838 // no connections yet, just turn it off 3839 hci_power_control_off(); 3840 break; 3841 case HCI_POWER_SLEEP: 3842 // no connections yet, just turn it off 3843 hci_power_control_sleep(); 3844 break; 3845 default: 3846 btstack_assert(false); 3847 break; 3848 } 3849 return ERROR_CODE_SUCCESS; 3850 } 3851 3852 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3853 switch (power_mode){ 3854 case HCI_POWER_ON: 3855 // do nothing 3856 break; 3857 case HCI_POWER_OFF: 3858 // see hci_run 3859 hci_stack->state = HCI_STATE_HALTING; 3860 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3861 break; 3862 case HCI_POWER_SLEEP: 3863 // see hci_run 3864 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3865 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3866 break; 3867 default: 3868 btstack_assert(false); 3869 break; 3870 } 3871 return ERROR_CODE_SUCCESS; 3872 } 3873 3874 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3875 switch (power_mode){ 3876 case HCI_POWER_ON: 3877 hci_power_transition_to_initializing(); 3878 break; 3879 case HCI_POWER_OFF: 3880 // do nothing 3881 break; 3882 case HCI_POWER_SLEEP: 3883 // see hci_run 3884 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3885 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3886 break; 3887 default: 3888 btstack_assert(false); 3889 break; 3890 } 3891 return ERROR_CODE_SUCCESS; 3892 } 3893 3894 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3895 switch (power_mode){ 3896 case HCI_POWER_ON: 3897 3898 #ifdef HAVE_PLATFORM_IPHONE_OS 3899 // nothing to do, if H4 supports power management 3900 if (btstack_control_iphone_power_management_enabled()){ 3901 hci_stack->state = HCI_STATE_INITIALIZING; 3902 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3903 break; 3904 } 3905 #endif 3906 hci_power_transition_to_initializing(); 3907 break; 3908 case HCI_POWER_OFF: 3909 // see hci_run 3910 hci_stack->state = HCI_STATE_HALTING; 3911 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3912 break; 3913 case HCI_POWER_SLEEP: 3914 // do nothing 3915 break; 3916 default: 3917 btstack_assert(false); 3918 break; 3919 } 3920 return ERROR_CODE_SUCCESS; 3921 } 3922 3923 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3924 int err; 3925 switch (power_mode){ 3926 case HCI_POWER_ON: 3927 #ifdef HAVE_PLATFORM_IPHONE_OS 3928 // nothing to do, if H4 supports power management 3929 if (btstack_control_iphone_power_management_enabled()){ 3930 hci_stack->state = HCI_STATE_INITIALIZING; 3931 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3932 hci_update_scan_enable(); 3933 break; 3934 } 3935 #endif 3936 err = hci_power_control_wake(); 3937 if (err) return err; 3938 hci_power_transition_to_initializing(); 3939 break; 3940 case HCI_POWER_OFF: 3941 hci_stack->state = HCI_STATE_HALTING; 3942 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3943 break; 3944 case HCI_POWER_SLEEP: 3945 // do nothing 3946 break; 3947 default: 3948 btstack_assert(false); 3949 break; 3950 } 3951 return ERROR_CODE_SUCCESS; 3952 } 3953 3954 int hci_power_control(HCI_POWER_MODE power_mode){ 3955 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3956 int err = 0; 3957 switch (hci_stack->state){ 3958 case HCI_STATE_OFF: 3959 err = hci_power_control_state_off(power_mode); 3960 break; 3961 case HCI_STATE_INITIALIZING: 3962 err = hci_power_control_state_initializing(power_mode); 3963 break; 3964 case HCI_STATE_WORKING: 3965 err = hci_power_control_state_working(power_mode); 3966 break; 3967 case HCI_STATE_HALTING: 3968 err = hci_power_control_state_halting(power_mode); 3969 break; 3970 case HCI_STATE_FALLING_ASLEEP: 3971 err = hci_power_control_state_falling_asleep(power_mode); 3972 break; 3973 case HCI_STATE_SLEEPING: 3974 err = hci_power_control_state_sleeping(power_mode); 3975 break; 3976 default: 3977 btstack_assert(false); 3978 break; 3979 } 3980 if (err != 0){ 3981 return err; 3982 } 3983 3984 // create internal event 3985 hci_emit_state(); 3986 3987 // trigger next/first action 3988 hci_run(); 3989 3990 return 0; 3991 } 3992 3993 3994 #ifdef ENABLE_CLASSIC 3995 3996 static void hci_update_scan_enable(void){ 3997 // 2 = page scan, 1 = inq scan 3998 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3999 hci_run(); 4000 } 4001 4002 void gap_discoverable_control(uint8_t enable){ 4003 if (enable) enable = 1; // normalize argument 4004 4005 if (hci_stack->discoverable == enable){ 4006 hci_emit_discoverable_enabled(hci_stack->discoverable); 4007 return; 4008 } 4009 4010 hci_stack->discoverable = enable; 4011 hci_update_scan_enable(); 4012 } 4013 4014 void gap_connectable_control(uint8_t enable){ 4015 if (enable) enable = 1; // normalize argument 4016 4017 // don't emit event 4018 if (hci_stack->connectable == enable) return; 4019 4020 hci_stack->connectable = enable; 4021 hci_update_scan_enable(); 4022 } 4023 #endif 4024 4025 void gap_local_bd_addr(bd_addr_t address_buffer){ 4026 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4027 } 4028 4029 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4030 static void hci_host_num_completed_packets(void){ 4031 4032 // create packet manually as arrays are not supported and num_commands should not get reduced 4033 hci_reserve_packet_buffer(); 4034 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4035 4036 uint16_t size = 0; 4037 uint16_t num_handles = 0; 4038 packet[size++] = 0x35; 4039 packet[size++] = 0x0c; 4040 size++; // skip param len 4041 size++; // skip num handles 4042 4043 // add { handle, packets } entries 4044 btstack_linked_item_t * it; 4045 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4046 hci_connection_t * connection = (hci_connection_t *) it; 4047 if (connection->num_packets_completed){ 4048 little_endian_store_16(packet, size, connection->con_handle); 4049 size += 2; 4050 little_endian_store_16(packet, size, connection->num_packets_completed); 4051 size += 2; 4052 // 4053 num_handles++; 4054 connection->num_packets_completed = 0; 4055 } 4056 } 4057 4058 packet[2] = size - 3; 4059 packet[3] = num_handles; 4060 4061 hci_stack->host_completed_packets = 0; 4062 4063 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4064 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4065 4066 // release packet buffer for synchronous transport implementations 4067 if (hci_transport_synchronous()){ 4068 hci_release_packet_buffer(); 4069 hci_emit_transport_packet_sent(); 4070 } 4071 } 4072 #endif 4073 4074 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4075 UNUSED(ds); 4076 hci_stack->substate = HCI_HALTING_CLOSE; 4077 // allow packet handlers to defer final shutdown 4078 hci_emit_state(); 4079 hci_run(); 4080 } 4081 4082 static bool hci_run_acl_fragments(void){ 4083 if (hci_stack->acl_fragmentation_total_size > 0u) { 4084 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4085 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4086 if (connection) { 4087 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4088 hci_send_acl_packet_fragments(connection); 4089 return true; 4090 } 4091 } else { 4092 // connection gone -> discard further fragments 4093 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4094 hci_stack->acl_fragmentation_total_size = 0; 4095 hci_stack->acl_fragmentation_pos = 0; 4096 } 4097 } 4098 return false; 4099 } 4100 4101 #ifdef ENABLE_CLASSIC 4102 static bool hci_run_general_gap_classic(void){ 4103 4104 // decline incoming connections 4105 if (hci_stack->decline_reason){ 4106 uint8_t reason = hci_stack->decline_reason; 4107 hci_stack->decline_reason = 0; 4108 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4109 return true; 4110 } 4111 // write page scan activity 4112 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_interval != 0xffff) && hci_classic_supported()){ 4113 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 4114 hci_stack->new_page_scan_interval = 0xffff; 4115 hci_stack->new_page_scan_window = 0xffff; 4116 return true; 4117 } 4118 // write page scan type 4119 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_type != 0xff) && hci_classic_supported()){ 4120 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 4121 hci_stack->new_page_scan_type = 0xff; 4122 return true; 4123 } 4124 // send scan enable 4125 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 4126 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 4127 hci_stack->new_scan_enable_value = 0xff; 4128 return true; 4129 } 4130 // start/stop inquiry 4131 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4132 uint8_t duration = hci_stack->inquiry_state; 4133 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4134 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4135 return true; 4136 } 4137 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4138 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4139 hci_send_cmd(&hci_inquiry_cancel); 4140 return true; 4141 } 4142 // remote name request 4143 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4144 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4145 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4146 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4147 return true; 4148 } 4149 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4150 // Local OOB data 4151 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 4152 hci_stack->classic_read_local_oob_data = false; 4153 if (hci_stack->local_supported_commands[1] & 0x10u){ 4154 hci_send_cmd(&hci_read_local_extended_oob_data); 4155 } else { 4156 hci_send_cmd(&hci_read_local_oob_data); 4157 } 4158 } 4159 #endif 4160 // pairing 4161 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4162 uint8_t state = hci_stack->gap_pairing_state; 4163 uint8_t pin_code[16]; 4164 switch (state){ 4165 case GAP_PAIRING_STATE_SEND_PIN: 4166 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4167 memset(pin_code, 0, 16); 4168 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4169 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4170 break; 4171 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4172 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4173 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4174 break; 4175 case GAP_PAIRING_STATE_SEND_PASSKEY: 4176 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4177 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4178 break; 4179 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4180 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4181 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4182 break; 4183 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4184 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4185 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4186 break; 4187 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4188 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4189 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4190 break; 4191 default: 4192 break; 4193 } 4194 return true; 4195 } 4196 return false; 4197 } 4198 #endif 4199 4200 #ifdef ENABLE_BLE 4201 static bool hci_run_general_gap_le(void){ 4202 4203 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4204 4205 if (hci_stack->state != HCI_STATE_WORKING) return false; 4206 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4207 4208 4209 // Phase 1: collect what to stop 4210 4211 bool scanning_stop = false; 4212 bool connecting_stop = false; 4213 bool advertising_stop = false; 4214 4215 #ifndef ENABLE_LE_CENTRAL 4216 UNUSED(scanning_stop); 4217 UNUSED(connecting_stop); 4218 #endif 4219 #ifndef ENABLE_LE_PERIPHERAL 4220 UNUSED(advertising_stop); 4221 #endif 4222 4223 // check if whitelist needs modification 4224 bool whitelist_modification_pending = false; 4225 btstack_linked_list_iterator_t lit; 4226 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4227 while (btstack_linked_list_iterator_has_next(&lit)){ 4228 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4229 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4230 whitelist_modification_pending = true; 4231 break; 4232 } 4233 } 4234 // check if resolving list needs modification 4235 bool resolving_list_modification_pending = false; 4236 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4237 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4238 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4239 resolving_list_modification_pending = true; 4240 } 4241 #endif 4242 4243 #ifdef ENABLE_LE_CENTRAL 4244 // scanning control 4245 if (hci_stack->le_scanning_active) { 4246 // stop if: 4247 // - parameter change required 4248 // - it's disabled 4249 // - whitelist change required but used for scanning 4250 // - resolving list modified 4251 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4252 if ((hci_stack->le_scanning_param_update) || 4253 !hci_stack->le_scanning_enabled || 4254 scanning_uses_whitelist || 4255 resolving_list_modification_pending){ 4256 4257 scanning_stop = true; 4258 } 4259 } 4260 #endif 4261 4262 #ifdef ENABLE_LE_CENTRAL 4263 // connecting control 4264 bool connecting_with_whitelist; 4265 switch (hci_stack->le_connecting_state){ 4266 case LE_CONNECTING_DIRECT: 4267 case LE_CONNECTING_WHITELIST: 4268 // stop connecting if: 4269 // - connecting uses white and whitelist modification pending 4270 // - if it got disabled 4271 // - resolving list modified 4272 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4273 if ((connecting_with_whitelist && whitelist_modification_pending) || 4274 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4275 resolving_list_modification_pending) { 4276 4277 connecting_stop = true; 4278 } 4279 break; 4280 default: 4281 break; 4282 } 4283 #endif 4284 4285 #ifdef ENABLE_LE_PERIPHERAL 4286 // le advertisement control 4287 if (hci_stack->le_advertisements_active){ 4288 // stop if: 4289 // - parameter change required 4290 // - it's disabled 4291 // - whitelist change required but used for advertisement filter policy 4292 // - resolving list modified 4293 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4294 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4295 if (advertising_change || 4296 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4297 (advertising_uses_whitelist & whitelist_modification_pending) || 4298 resolving_list_modification_pending) { 4299 4300 advertising_stop = true; 4301 } 4302 } 4303 #endif 4304 4305 4306 // Phase 2: stop everything that should be off during modifications 4307 4308 #ifdef ENABLE_LE_CENTRAL 4309 if (scanning_stop){ 4310 hci_stack->le_scanning_active = false; 4311 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4312 return true; 4313 } 4314 #endif 4315 4316 #ifdef ENABLE_LE_CENTRAL 4317 if (connecting_stop){ 4318 hci_send_cmd(&hci_le_create_connection_cancel); 4319 return true; 4320 } 4321 #endif 4322 4323 #ifdef ENABLE_LE_PERIPHERAL 4324 if (advertising_stop){ 4325 hci_stack->le_advertisements_active = false; 4326 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4327 return true; 4328 } 4329 #endif 4330 4331 // Phase 3: modify 4332 4333 #ifdef ENABLE_LE_CENTRAL 4334 if (hci_stack->le_scanning_param_update){ 4335 hci_stack->le_scanning_param_update = false; 4336 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4337 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4338 return true; 4339 } 4340 #endif 4341 4342 #ifdef ENABLE_LE_PERIPHERAL 4343 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4344 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4345 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4346 hci_send_cmd(&hci_le_set_advertising_parameters, 4347 hci_stack->le_advertisements_interval_min, 4348 hci_stack->le_advertisements_interval_max, 4349 hci_stack->le_advertisements_type, 4350 hci_stack->le_advertisements_own_addr_type, 4351 hci_stack->le_advertisements_direct_address_type, 4352 hci_stack->le_advertisements_direct_address, 4353 hci_stack->le_advertisements_channel_map, 4354 hci_stack->le_advertisements_filter_policy); 4355 return true; 4356 } 4357 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4358 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4359 uint8_t adv_data_clean[31]; 4360 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4361 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4362 hci_stack->le_advertisements_data_len); 4363 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4364 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4365 return true; 4366 } 4367 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4368 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4369 uint8_t scan_data_clean[31]; 4370 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4371 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4372 hci_stack->le_scan_response_data_len); 4373 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4374 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4375 return true; 4376 } 4377 #endif 4378 4379 4380 #ifdef ENABLE_LE_CENTRAL 4381 // if connect with whitelist was active and is not cancelled yet, wait until next time 4382 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4383 #endif 4384 4385 // LE Whitelist Management 4386 if (whitelist_modification_pending){ 4387 // add/remove entries 4388 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4389 while (btstack_linked_list_iterator_has_next(&lit)){ 4390 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4391 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4392 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4393 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4394 return true; 4395 } 4396 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4397 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4398 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4399 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4400 return true; 4401 } 4402 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4403 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4404 btstack_memory_whitelist_entry_free(entry); 4405 } 4406 } 4407 } 4408 4409 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4410 // LE Resolving List Management 4411 if (resolving_list_supported) { 4412 uint16_t i; 4413 switch (hci_stack->le_resolving_list_state) { 4414 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4415 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4416 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4417 return true; 4418 case LE_RESOLVING_LIST_READ_SIZE: 4419 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4420 hci_send_cmd(&hci_le_read_resolving_list_size); 4421 return true; 4422 case LE_RESOLVING_LIST_SEND_CLEAR: 4423 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4424 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4425 sizeof(hci_stack->le_resolving_list_add_entries)); 4426 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4427 sizeof(hci_stack->le_resolving_list_remove_entries)); 4428 hci_send_cmd(&hci_le_clear_resolving_list); 4429 return true; 4430 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4431 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4432 uint8_t offset = i >> 3; 4433 uint8_t mask = 1 << (i & 7); 4434 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4435 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4436 bd_addr_t peer_identity_addreses; 4437 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4438 sm_key_t peer_irk; 4439 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4440 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4441 4442 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4443 // trigger whitelist entry 'update' (work around for controller bug) 4444 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4445 while (btstack_linked_list_iterator_has_next(&lit)) { 4446 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4447 if (entry->address_type != peer_identity_addr_type) continue; 4448 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4449 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4450 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4451 } 4452 #endif 4453 4454 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4455 peer_identity_addreses); 4456 return true; 4457 } 4458 4459 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4460 4461 /* fall through */ 4462 4463 case LE_RESOLVING_LIST_ADD_ENTRIES: 4464 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4465 uint8_t offset = i >> 3; 4466 uint8_t mask = 1 << (i & 7); 4467 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4468 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4469 bd_addr_t peer_identity_addreses; 4470 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4471 sm_key_t peer_irk; 4472 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4473 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4474 const uint8_t *local_irk = gap_get_persistent_irk(); 4475 // command uses format specifier 'P' that stores 16-byte value without flip 4476 uint8_t local_irk_flipped[16]; 4477 uint8_t peer_irk_flipped[16]; 4478 reverse_128(local_irk, local_irk_flipped); 4479 reverse_128(peer_irk, peer_irk_flipped); 4480 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4481 peer_irk_flipped, local_irk_flipped); 4482 return true; 4483 } 4484 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4485 break; 4486 4487 default: 4488 break; 4489 } 4490 } 4491 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4492 #endif 4493 4494 // Phase 4: restore state 4495 4496 #ifdef ENABLE_LE_CENTRAL 4497 // re-start scanning 4498 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4499 hci_stack->le_scanning_active = true; 4500 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4501 return true; 4502 } 4503 #endif 4504 4505 #ifdef ENABLE_LE_CENTRAL 4506 // re-start connecting 4507 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4508 bd_addr_t null_addr; 4509 memset(null_addr, 0, 6); 4510 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4511 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4512 hci_send_cmd(&hci_le_create_connection, 4513 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4514 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4515 1, // use whitelist 4516 0, // peer address type 4517 null_addr, // peer bd addr 4518 hci_stack->le_connection_own_addr_type, // our addr type: 4519 hci_stack->le_connection_interval_min, // conn interval min 4520 hci_stack->le_connection_interval_max, // conn interval max 4521 hci_stack->le_connection_latency, // conn latency 4522 hci_stack->le_supervision_timeout, // conn latency 4523 hci_stack->le_minimum_ce_length, // min ce length 4524 hci_stack->le_maximum_ce_length // max ce length 4525 ); 4526 return true; 4527 } 4528 #endif 4529 4530 #ifdef ENABLE_LE_PERIPHERAL 4531 // re-start advertising 4532 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4533 // check if advertisements should be enabled given 4534 hci_stack->le_advertisements_active = true; 4535 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_advertisements_own_address); 4536 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4537 return true; 4538 } 4539 #endif 4540 4541 return false; 4542 } 4543 #endif 4544 4545 static bool hci_run_general_pending_commands(void){ 4546 btstack_linked_item_t * it; 4547 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4548 hci_connection_t * connection = (hci_connection_t *) it; 4549 4550 switch(connection->state){ 4551 case SEND_CREATE_CONNECTION: 4552 switch(connection->address_type){ 4553 #ifdef ENABLE_CLASSIC 4554 case BD_ADDR_TYPE_ACL: 4555 log_info("sending hci_create_connection"); 4556 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4557 break; 4558 #endif 4559 default: 4560 #ifdef ENABLE_BLE 4561 #ifdef ENABLE_LE_CENTRAL 4562 log_info("sending hci_le_create_connection"); 4563 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4564 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4565 hci_send_cmd(&hci_le_create_connection, 4566 hci_stack->le_connection_scan_interval, // conn scan interval 4567 hci_stack->le_connection_scan_window, // conn scan windows 4568 0, // don't use whitelist 4569 connection->address_type, // peer address type 4570 connection->address, // peer bd addr 4571 hci_stack->le_connection_own_addr_type, // our addr type: 4572 hci_stack->le_connection_interval_min, // conn interval min 4573 hci_stack->le_connection_interval_max, // conn interval max 4574 hci_stack->le_connection_latency, // conn latency 4575 hci_stack->le_supervision_timeout, // conn latency 4576 hci_stack->le_minimum_ce_length, // min ce length 4577 hci_stack->le_maximum_ce_length // max ce length 4578 ); 4579 connection->state = SENT_CREATE_CONNECTION; 4580 #endif 4581 #endif 4582 break; 4583 } 4584 return true; 4585 4586 #ifdef ENABLE_CLASSIC 4587 case RECEIVED_CONNECTION_REQUEST: 4588 connection->role = HCI_ROLE_SLAVE; 4589 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4590 log_info("sending hci_accept_connection_request"); 4591 connection->state = ACCEPTED_CONNECTION_REQUEST; 4592 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4593 } 4594 return true; 4595 #endif 4596 4597 #ifdef ENABLE_BLE 4598 #ifdef ENABLE_LE_CENTRAL 4599 case SEND_CANCEL_CONNECTION: 4600 connection->state = SENT_CANCEL_CONNECTION; 4601 hci_send_cmd(&hci_le_create_connection_cancel); 4602 return true; 4603 #endif 4604 #endif 4605 case SEND_DISCONNECT: 4606 connection->state = SENT_DISCONNECT; 4607 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4608 return true; 4609 4610 default: 4611 break; 4612 } 4613 4614 // no further commands if connection is about to get shut down 4615 if (connection->state == SENT_DISCONNECT) continue; 4616 4617 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4618 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4619 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4620 return true; 4621 } 4622 4623 #ifdef ENABLE_CLASSIC 4624 4625 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4626 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4627 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4628 return true; 4629 } 4630 4631 // Handling link key request requires remote supported features 4632 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4633 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4634 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4635 4636 // lookup link key using cached key first 4637 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4638 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4639 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4640 } 4641 4642 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4643 if (have_link_key && security_level_sufficient){ 4644 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4645 } else { 4646 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4647 } 4648 return true; 4649 } 4650 4651 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4652 log_info("denying to pin request"); 4653 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4654 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4655 return true; 4656 } 4657 4658 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4659 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4660 // set authentication requirements: 4661 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4662 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4663 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4664 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4665 authreq |= 1; 4666 } 4667 bool bonding = hci_stack->bondable; 4668 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4669 // if we have received IO Cap Response, we're in responder role 4670 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4671 if (bonding && !remote_bonding){ 4672 log_info("Remote not bonding, dropping local flag"); 4673 bonding = false; 4674 } 4675 } 4676 if (bonding){ 4677 if (connection->bonding_flags & BONDING_DEDICATED){ 4678 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4679 } else { 4680 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4681 } 4682 } 4683 uint8_t have_oob_data = 0; 4684 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4685 if (connection->classic_oob_c_192 != NULL){ 4686 have_oob_data |= 1; 4687 } 4688 if (connection->classic_oob_c_256 != NULL){ 4689 have_oob_data |= 2; 4690 } 4691 #endif 4692 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4693 return true; 4694 } 4695 4696 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4697 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4698 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4699 return true; 4700 } 4701 4702 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4703 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4704 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4705 const uint8_t zero[16] = { 0 }; 4706 const uint8_t * r_192 = zero; 4707 const uint8_t * c_192 = zero; 4708 const uint8_t * r_256 = zero; 4709 const uint8_t * c_256 = zero; 4710 // verify P-256 OOB 4711 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4712 c_256 = connection->classic_oob_c_256; 4713 if (connection->classic_oob_r_256 != NULL) { 4714 r_256 = connection->classic_oob_r_256; 4715 } 4716 } 4717 // verify P-192 OOB 4718 if ((connection->classic_oob_c_192 != NULL)) { 4719 c_192 = connection->classic_oob_c_192; 4720 if (connection->classic_oob_r_192 != NULL) { 4721 r_192 = connection->classic_oob_r_192; 4722 } 4723 } 4724 4725 // assess security 4726 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4727 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4728 if (need_level_4 && !can_reach_level_4){ 4729 log_info("Level 4 required, but not possible -> abort"); 4730 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4731 // send oob negative reply 4732 c_256 = NULL; 4733 c_192 = NULL; 4734 } 4735 4736 // Reply 4737 if (c_256 != zero) { 4738 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4739 } else if (c_192 != zero){ 4740 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4741 } else { 4742 hci_stack->classic_oob_con_handle = connection->con_handle; 4743 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4744 } 4745 return true; 4746 } 4747 #endif 4748 4749 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4750 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4751 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4752 return true; 4753 } 4754 4755 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4756 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4757 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4758 return true; 4759 } 4760 4761 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4762 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4763 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4764 return true; 4765 } 4766 4767 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4768 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4769 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4770 return true; 4771 } 4772 4773 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4774 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4775 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4776 return true; 4777 } 4778 4779 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4780 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4781 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4782 return true; 4783 } 4784 4785 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4786 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4787 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4788 connection->state = SENT_DISCONNECT; 4789 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4790 return true; 4791 } 4792 4793 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4794 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4795 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4796 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4797 return true; 4798 } 4799 4800 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4801 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4802 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4803 return true; 4804 } 4805 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4806 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4807 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4808 return true; 4809 } 4810 #endif 4811 4812 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4813 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4814 #ifdef ENABLE_CLASSIC 4815 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4816 #endif 4817 if (connection->state != SENT_DISCONNECT){ 4818 connection->state = SENT_DISCONNECT; 4819 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4820 return true; 4821 } 4822 } 4823 4824 #ifdef ENABLE_CLASSIC 4825 uint16_t sniff_min_interval; 4826 switch (connection->sniff_min_interval){ 4827 case 0: 4828 break; 4829 case 0xffff: 4830 connection->sniff_min_interval = 0; 4831 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4832 return true; 4833 default: 4834 sniff_min_interval = connection->sniff_min_interval; 4835 connection->sniff_min_interval = 0; 4836 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4837 return true; 4838 } 4839 4840 if (connection->sniff_subrating_max_latency != 0xffff){ 4841 uint16_t max_latency = connection->sniff_subrating_max_latency; 4842 connection->sniff_subrating_max_latency = 0; 4843 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4844 return true; 4845 } 4846 4847 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4848 uint8_t service_type = (uint8_t) connection->qos_service_type; 4849 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4850 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); 4851 return true; 4852 } 4853 4854 if (connection->request_role != HCI_ROLE_INVALID){ 4855 hci_role_t role = connection->request_role; 4856 connection->request_role = HCI_ROLE_INVALID; 4857 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4858 return true; 4859 } 4860 #endif 4861 4862 #ifdef ENABLE_BLE 4863 switch (connection->le_con_parameter_update_state){ 4864 // response to L2CAP CON PARAMETER UPDATE REQUEST 4865 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4866 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4867 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4868 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4869 0x0000, 0xffff); 4870 return true; 4871 case CON_PARAMETER_UPDATE_REPLY: 4872 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4873 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4874 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4875 0x0000, 0xffff); 4876 return true; 4877 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4878 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4879 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4880 return true; 4881 default: 4882 break; 4883 } 4884 if (connection->le_phy_update_all_phys != 0xffu){ 4885 uint8_t all_phys = connection->le_phy_update_all_phys; 4886 connection->le_phy_update_all_phys = 0xff; 4887 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); 4888 return true; 4889 } 4890 #endif 4891 } 4892 return false; 4893 } 4894 4895 static void hci_run(void){ 4896 4897 bool done; 4898 4899 // send continuation fragments first, as they block the prepared packet buffer 4900 done = hci_run_acl_fragments(); 4901 if (done) return; 4902 4903 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4904 // send host num completed packets next as they don't require num_cmd_packets > 0 4905 if (!hci_can_send_comand_packet_transport()) return; 4906 if (hci_stack->host_completed_packets){ 4907 hci_host_num_completed_packets(); 4908 return; 4909 } 4910 #endif 4911 4912 if (!hci_can_send_command_packet_now()) return; 4913 4914 // global/non-connection oriented commands 4915 4916 4917 #ifdef ENABLE_CLASSIC 4918 // general gap classic 4919 done = hci_run_general_gap_classic(); 4920 if (done) return; 4921 #endif 4922 4923 #ifdef ENABLE_BLE 4924 // general gap le 4925 done = hci_run_general_gap_le(); 4926 if (done) return; 4927 #endif 4928 4929 // send pending HCI commands 4930 done = hci_run_general_pending_commands(); 4931 if (done) return; 4932 4933 // stack state sub statemachines 4934 hci_connection_t * connection; 4935 switch (hci_stack->state){ 4936 case HCI_STATE_INITIALIZING: 4937 hci_initializing_run(); 4938 break; 4939 4940 case HCI_STATE_HALTING: 4941 4942 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4943 switch (hci_stack->substate){ 4944 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4945 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4946 4947 #ifdef ENABLE_BLE 4948 #ifdef ENABLE_LE_CENTRAL 4949 // free whitelist entries 4950 { 4951 btstack_linked_list_iterator_t lit; 4952 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4953 while (btstack_linked_list_iterator_has_next(&lit)){ 4954 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4955 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4956 btstack_memory_whitelist_entry_free(entry); 4957 } 4958 } 4959 #endif 4960 #endif 4961 // close all open connections 4962 connection = (hci_connection_t *) hci_stack->connections; 4963 if (connection){ 4964 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4965 if (!hci_can_send_command_packet_now()) return; 4966 4967 // check state 4968 if (connection->state == SENT_DISCONNECT) return; 4969 connection->state = SENT_DISCONNECT; 4970 4971 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4972 4973 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4974 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4975 4976 // ... which would be ignored anyway as we shutdown (free) the connection now 4977 hci_shutdown_connection(connection); 4978 4979 // finally, send the disconnect command 4980 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4981 return; 4982 } 4983 4984 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4985 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4986 log_info("HCI_STATE_HALTING: wait 50 ms"); 4987 hci_stack->substate = HCI_HALTING_W4_TIMER; 4988 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4989 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4990 btstack_run_loop_add_timer(&hci_stack->timeout); 4991 break; 4992 } 4993 4994 /* fall through */ 4995 4996 case HCI_HALTING_CLOSE: 4997 log_info("HCI_STATE_HALTING, calling off"); 4998 4999 // switch mode 5000 hci_power_control_off(); 5001 5002 log_info("HCI_STATE_HALTING, emitting state"); 5003 hci_emit_state(); 5004 log_info("HCI_STATE_HALTING, done"); 5005 break; 5006 5007 case HCI_HALTING_W4_TIMER: 5008 // keep waiting 5009 5010 break; 5011 default: 5012 break; 5013 } 5014 5015 break; 5016 5017 case HCI_STATE_FALLING_ASLEEP: 5018 switch(hci_stack->substate) { 5019 case HCI_FALLING_ASLEEP_DISCONNECT: 5020 log_info("HCI_STATE_FALLING_ASLEEP"); 5021 // close all open connections 5022 connection = (hci_connection_t *) hci_stack->connections; 5023 5024 #ifdef HAVE_PLATFORM_IPHONE_OS 5025 // don't close connections, if H4 supports power management 5026 if (btstack_control_iphone_power_management_enabled()){ 5027 connection = NULL; 5028 } 5029 #endif 5030 if (connection){ 5031 5032 // send disconnect 5033 if (!hci_can_send_command_packet_now()) return; 5034 5035 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5036 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5037 5038 // send disconnected event right away - causes higher layer connections to get closed, too. 5039 hci_shutdown_connection(connection); 5040 return; 5041 } 5042 5043 if (hci_classic_supported()){ 5044 // disable page and inquiry scan 5045 if (!hci_can_send_command_packet_now()) return; 5046 5047 log_info("HCI_STATE_HALTING, disabling inq scans"); 5048 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5049 5050 // continue in next sub state 5051 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5052 break; 5053 } 5054 5055 /* fall through */ 5056 5057 case HCI_FALLING_ASLEEP_COMPLETE: 5058 log_info("HCI_STATE_HALTING, calling sleep"); 5059 #ifdef HAVE_PLATFORM_IPHONE_OS 5060 // don't actually go to sleep, if H4 supports power management 5061 if (btstack_control_iphone_power_management_enabled()){ 5062 // SLEEP MODE reached 5063 hci_stack->state = HCI_STATE_SLEEPING; 5064 hci_emit_state(); 5065 break; 5066 } 5067 #endif 5068 // switch mode 5069 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5070 hci_emit_state(); 5071 break; 5072 5073 default: 5074 break; 5075 } 5076 break; 5077 5078 default: 5079 break; 5080 } 5081 } 5082 5083 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5084 // house-keeping 5085 5086 #ifdef ENABLE_CLASSIC 5087 bd_addr_t addr; 5088 hci_connection_t * conn; 5089 #endif 5090 #ifdef ENABLE_LE_CENTRAL 5091 uint8_t initiator_filter_policy; 5092 #endif 5093 5094 uint16_t opcode = little_endian_read_16(packet, 0); 5095 switch (opcode) { 5096 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5097 hci_stack->loopback_mode = packet[3]; 5098 break; 5099 5100 #ifdef ENABLE_CLASSIC 5101 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5102 reverse_bd_addr(&packet[3], addr); 5103 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5104 5105 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5106 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5107 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5108 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5109 } 5110 5111 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5112 if (!conn) { 5113 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5114 if (!conn) { 5115 // notify client that alloc failed 5116 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5117 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5118 } 5119 conn->state = SEND_CREATE_CONNECTION; 5120 conn->role = HCI_ROLE_MASTER; 5121 } 5122 log_info("conn state %u", conn->state); 5123 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5124 switch (conn->state) { 5125 // if connection active exists 5126 case OPEN: 5127 // and OPEN, emit connection complete command 5128 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5129 // packet not sent to controller 5130 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5131 case RECEIVED_DISCONNECTION_COMPLETE: 5132 // create connection triggered in disconnect complete event, let's do it now 5133 break; 5134 case SEND_CREATE_CONNECTION: 5135 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5136 break; 5137 default: 5138 // otherwise, just ignore as it is already in the open process 5139 // packet not sent to controller 5140 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5141 } 5142 conn->state = SENT_CREATE_CONNECTION; 5143 5144 // track outgoing connection 5145 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5146 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5147 break; 5148 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5149 if (hci_stack->link_key_db) { 5150 reverse_bd_addr(&packet[3], addr); 5151 hci_stack->link_key_db->delete_link_key(addr); 5152 } 5153 break; 5154 5155 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5156 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5157 // setup_synchronous_connection? Voice setting at offset 22 5158 // TODO: compare to current setting if sco connection already active 5159 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5160 break; 5161 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5162 // accept_synchronus_connection? Voice setting at offset 18 5163 // TODO: compare to current setting if sco connection already active 5164 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5165 break; 5166 #endif 5167 #endif 5168 5169 #ifdef ENABLE_BLE 5170 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5171 hci_stack->le_random_address_set = 1; 5172 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5173 break; 5174 #ifdef ENABLE_LE_PERIPHERAL 5175 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5176 hci_stack->le_advertisements_active = packet[3] != 0; 5177 break; 5178 #endif 5179 #ifdef ENABLE_LE_CENTRAL 5180 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5181 // white list used? 5182 initiator_filter_policy = packet[7]; 5183 switch (initiator_filter_policy) { 5184 case 0: 5185 // whitelist not used 5186 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5187 break; 5188 case 1: 5189 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5190 break; 5191 default: 5192 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5193 break; 5194 } 5195 // track outgoing connection 5196 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5197 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5198 break; 5199 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5200 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5201 break; 5202 #endif 5203 #endif 5204 default: 5205 break; 5206 } 5207 5208 hci_stack->num_cmd_packets--; 5209 5210 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5211 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5212 if (err != 0){ 5213 return ERROR_CODE_HARDWARE_FAILURE; 5214 } 5215 return ERROR_CODE_SUCCESS; 5216 } 5217 5218 // disconnect because of security block 5219 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5220 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5221 if (!connection) return; 5222 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5223 } 5224 5225 5226 // Configure Secure Simple Pairing 5227 5228 #ifdef ENABLE_CLASSIC 5229 5230 // enable will enable SSP during init 5231 void gap_ssp_set_enable(int enable){ 5232 hci_stack->ssp_enable = enable; 5233 } 5234 5235 static int hci_local_ssp_activated(void){ 5236 return gap_ssp_supported() && hci_stack->ssp_enable; 5237 } 5238 5239 // if set, BTstack will respond to io capability request using authentication requirement 5240 void gap_ssp_set_io_capability(int io_capability){ 5241 hci_stack->ssp_io_capability = io_capability; 5242 } 5243 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5244 hci_stack->ssp_authentication_requirement = authentication_requirement; 5245 } 5246 5247 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5248 void gap_ssp_set_auto_accept(int auto_accept){ 5249 hci_stack->ssp_auto_accept = auto_accept; 5250 } 5251 5252 void gap_secure_connections_enable(bool enable){ 5253 hci_stack->secure_connections_enable = enable; 5254 } 5255 5256 #endif 5257 5258 // va_list part of hci_send_cmd 5259 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5260 if (!hci_can_send_command_packet_now()){ 5261 log_error("hci_send_cmd called but cannot send packet now"); 5262 return ERROR_CODE_COMMAND_DISALLOWED; 5263 } 5264 5265 // for HCI INITIALIZATION 5266 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5267 hci_stack->last_cmd_opcode = cmd->opcode; 5268 5269 hci_reserve_packet_buffer(); 5270 uint8_t * packet = hci_stack->hci_packet_buffer; 5271 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5272 uint8_t status = hci_send_cmd_packet(packet, size); 5273 5274 // release packet buffer on error or for synchronous transport implementations 5275 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5276 hci_release_packet_buffer(); 5277 hci_emit_transport_packet_sent(); 5278 } 5279 5280 return status; 5281 } 5282 5283 /** 5284 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5285 */ 5286 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5287 va_list argptr; 5288 va_start(argptr, cmd); 5289 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5290 va_end(argptr); 5291 return status; 5292 } 5293 5294 // Create various non-HCI events. 5295 // TODO: generalize, use table similar to hci_create_command 5296 5297 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5298 // dump packet 5299 if (dump) { 5300 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5301 } 5302 5303 // dispatch to all event handlers 5304 btstack_linked_list_iterator_t it; 5305 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5306 while (btstack_linked_list_iterator_has_next(&it)){ 5307 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5308 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5309 } 5310 } 5311 5312 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5313 if (!hci_stack->acl_packet_handler) return; 5314 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5315 } 5316 5317 #ifdef ENABLE_CLASSIC 5318 static void hci_notify_if_sco_can_send_now(void){ 5319 // notify SCO sender if waiting 5320 if (!hci_stack->sco_waiting_for_can_send_now) return; 5321 if (hci_can_send_sco_packet_now()){ 5322 hci_stack->sco_waiting_for_can_send_now = 0; 5323 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5324 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5325 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5326 } 5327 } 5328 5329 // parsing end emitting has been merged to reduce code size 5330 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5331 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5332 5333 uint8_t * eir_data; 5334 ad_context_t context; 5335 const uint8_t * name; 5336 uint8_t name_len; 5337 5338 if (size < 3) return; 5339 5340 int event_type = hci_event_packet_get_type(packet); 5341 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5342 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5343 5344 switch (event_type){ 5345 case HCI_EVENT_INQUIRY_RESULT: 5346 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5347 if (size != (3 + (num_responses * 14))) return; 5348 break; 5349 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5350 if (size != 257) return; 5351 if (num_responses != 1) return; 5352 break; 5353 default: 5354 return; 5355 } 5356 5357 // event[1] is set at the end 5358 int i; 5359 for (i=0; i<num_responses;i++){ 5360 memset(event, 0, sizeof(event)); 5361 event[0] = GAP_EVENT_INQUIRY_RESULT; 5362 uint8_t event_size = 27; // if name is not set by EIR 5363 5364 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5365 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5366 (void)memcpy(&event[9], 5367 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5368 3); // class of device 5369 (void)memcpy(&event[12], 5370 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5371 2); // clock offset 5372 5373 switch (event_type){ 5374 case HCI_EVENT_INQUIRY_RESULT: 5375 // 14,15,16,17 = 0, size 18 5376 break; 5377 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5378 event[14] = 1; 5379 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5380 // 16,17 = 0, size 18 5381 break; 5382 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5383 event[14] = 1; 5384 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5385 // EIR packets only contain a single inquiry response 5386 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5387 name = NULL; 5388 // Iterate over EIR data 5389 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5390 uint8_t data_type = ad_iterator_get_data_type(&context); 5391 uint8_t data_size = ad_iterator_get_data_len(&context); 5392 const uint8_t * data = ad_iterator_get_data(&context); 5393 // Prefer Complete Local Name over Shortened Local Name 5394 switch (data_type){ 5395 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5396 if (name) continue; 5397 /* fall through */ 5398 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5399 name = data; 5400 name_len = data_size; 5401 break; 5402 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5403 if (data_size != 8) break; 5404 event[16] = 1; 5405 memcpy(&event[17], data, 8); 5406 break; 5407 default: 5408 break; 5409 } 5410 } 5411 if (name){ 5412 event[25] = 1; 5413 // truncate name if needed 5414 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5415 event[26] = len; 5416 (void)memcpy(&event[27], name, len); 5417 event_size += len; 5418 } 5419 break; 5420 default: 5421 return; 5422 } 5423 event[1] = event_size - 2; 5424 hci_emit_event(event, event_size, 1); 5425 } 5426 } 5427 #endif 5428 5429 void hci_emit_state(void){ 5430 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5431 uint8_t event[3]; 5432 event[0] = BTSTACK_EVENT_STATE; 5433 event[1] = sizeof(event) - 2u; 5434 event[2] = hci_stack->state; 5435 hci_emit_event(event, sizeof(event), 1); 5436 } 5437 5438 #ifdef ENABLE_CLASSIC 5439 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5440 uint8_t event[13]; 5441 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5442 event[1] = sizeof(event) - 2; 5443 event[2] = status; 5444 little_endian_store_16(event, 3, con_handle); 5445 reverse_bd_addr(address, &event[5]); 5446 event[11] = 1; // ACL connection 5447 event[12] = 0; // encryption disabled 5448 hci_emit_event(event, sizeof(event), 1); 5449 } 5450 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5451 if (disable_l2cap_timeouts) return; 5452 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5453 uint8_t event[4]; 5454 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5455 event[1] = sizeof(event) - 2; 5456 little_endian_store_16(event, 2, conn->con_handle); 5457 hci_emit_event(event, sizeof(event), 1); 5458 } 5459 #endif 5460 5461 #ifdef ENABLE_BLE 5462 #ifdef ENABLE_LE_CENTRAL 5463 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){ 5464 uint8_t event[21]; 5465 event[0] = HCI_EVENT_LE_META; 5466 event[1] = sizeof(event) - 2u; 5467 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5468 event[3] = status; 5469 little_endian_store_16(event, 4, con_handle); 5470 event[6] = 0; // TODO: role 5471 event[7] = address_type; 5472 reverse_bd_addr(address, &event[8]); 5473 little_endian_store_16(event, 14, 0); // interval 5474 little_endian_store_16(event, 16, 0); // latency 5475 little_endian_store_16(event, 18, 0); // supervision timeout 5476 event[20] = 0; // master clock accuracy 5477 hci_emit_event(event, sizeof(event), 1); 5478 } 5479 #endif 5480 #endif 5481 5482 static void hci_emit_transport_packet_sent(void){ 5483 // notify upper stack that it might be possible to send again 5484 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5485 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5486 } 5487 5488 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5489 uint8_t event[6]; 5490 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5491 event[1] = sizeof(event) - 2u; 5492 event[2] = 0; // status = OK 5493 little_endian_store_16(event, 3, con_handle); 5494 event[5] = reason; 5495 hci_emit_event(event, sizeof(event), 1); 5496 } 5497 5498 static void hci_emit_nr_connections_changed(void){ 5499 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5500 uint8_t event[3]; 5501 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5502 event[1] = sizeof(event) - 2u; 5503 event[2] = nr_hci_connections(); 5504 hci_emit_event(event, sizeof(event), 1); 5505 } 5506 5507 static void hci_emit_hci_open_failed(void){ 5508 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5509 uint8_t event[2]; 5510 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5511 event[1] = sizeof(event) - 2u; 5512 hci_emit_event(event, sizeof(event), 1); 5513 } 5514 5515 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5516 log_info("hci_emit_dedicated_bonding_result %u ", status); 5517 uint8_t event[9]; 5518 int pos = 0; 5519 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5520 event[pos++] = sizeof(event) - 2u; 5521 event[pos++] = status; 5522 reverse_bd_addr(address, &event[pos]); 5523 hci_emit_event(event, sizeof(event), 1); 5524 } 5525 5526 5527 #ifdef ENABLE_CLASSIC 5528 5529 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5530 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5531 uint8_t event[5]; 5532 int pos = 0; 5533 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5534 event[pos++] = sizeof(event) - 2; 5535 little_endian_store_16(event, 2, con_handle); 5536 pos += 2; 5537 event[pos++] = level; 5538 hci_emit_event(event, sizeof(event), 1); 5539 } 5540 5541 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5542 if (!connection) return LEVEL_0; 5543 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5544 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5545 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5546 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5547 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5548 // LEVEL 4 always requires 128 bit encrytion key size 5549 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5550 security_level = LEVEL_3; 5551 } 5552 return security_level; 5553 } 5554 5555 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5556 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5557 uint8_t event[3]; 5558 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5559 event[1] = sizeof(event) - 2; 5560 event[2] = enabled; 5561 hci_emit_event(event, sizeof(event), 1); 5562 } 5563 5564 // query if remote side supports eSCO 5565 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5566 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5567 if (!connection) return false; 5568 return (connection->remote_supported_features[0] & 1) != 0; 5569 } 5570 5571 static bool hci_ssp_supported(hci_connection_t * connection){ 5572 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5573 return (connection->bonding_flags & mask) == mask; 5574 } 5575 5576 // query if remote side supports SSP 5577 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5578 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5579 if (!connection) return false; 5580 return hci_ssp_supported(connection) ? 1 : 0; 5581 } 5582 5583 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5584 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5585 } 5586 5587 // GAP API 5588 /** 5589 * @bbrief enable/disable bonding. default is enabled 5590 * @praram enabled 5591 */ 5592 void gap_set_bondable_mode(int enable){ 5593 hci_stack->bondable = enable ? 1 : 0; 5594 } 5595 /** 5596 * @brief Get bondable mode. 5597 * @return 1 if bondable 5598 */ 5599 int gap_get_bondable_mode(void){ 5600 return hci_stack->bondable; 5601 } 5602 5603 /** 5604 * @brief map link keys to security levels 5605 */ 5606 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5607 switch (link_key_type){ 5608 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5609 return LEVEL_4; 5610 case COMBINATION_KEY: 5611 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5612 return LEVEL_3; 5613 default: 5614 return LEVEL_2; 5615 } 5616 } 5617 5618 /** 5619 * @brief map link keys to secure connection yes/no 5620 */ 5621 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5622 switch (link_key_type){ 5623 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5624 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5625 return 1; 5626 default: 5627 return 0; 5628 } 5629 } 5630 5631 /** 5632 * @brief map link keys to authenticated 5633 */ 5634 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5635 switch (link_key_type){ 5636 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5637 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5638 return 1; 5639 default: 5640 return 0; 5641 } 5642 } 5643 5644 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5645 log_info("gap_mitm_protection_required_for_security_level %u", level); 5646 return level > LEVEL_2; 5647 } 5648 5649 /** 5650 * @brief get current security level 5651 */ 5652 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5653 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5654 if (!connection) return LEVEL_0; 5655 return gap_security_level_for_connection(connection); 5656 } 5657 5658 /** 5659 * @brief request connection to device to 5660 * @result GAP_AUTHENTICATION_RESULT 5661 */ 5662 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5663 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5664 if (!connection){ 5665 hci_emit_security_level(con_handle, LEVEL_0); 5666 return; 5667 } 5668 5669 btstack_assert(hci_is_le_connection(connection) == false); 5670 5671 // 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) 5672 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5673 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5674 requested_level = LEVEL_4; 5675 } 5676 5677 gap_security_level_t current_level = gap_security_level(con_handle); 5678 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5679 requested_level, connection->requested_security_level, current_level); 5680 5681 // authentication active if authentication request was sent or planned level > 0 5682 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5683 if (authentication_active){ 5684 // authentication already active 5685 if (connection->requested_security_level < requested_level){ 5686 // increase requested level as new level is higher 5687 // TODO: handle re-authentication when done 5688 connection->requested_security_level = requested_level; 5689 } 5690 } else { 5691 // no request active, notify if security sufficient 5692 if (requested_level <= current_level){ 5693 hci_emit_security_level(con_handle, current_level); 5694 return; 5695 } 5696 5697 // store request 5698 connection->requested_security_level = requested_level; 5699 5700 // start to authenticate connection 5701 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5702 hci_run(); 5703 } 5704 } 5705 5706 /** 5707 * @brief start dedicated bonding with device. disconnect after bonding 5708 * @param device 5709 * @param request MITM protection 5710 * @result GAP_DEDICATED_BONDING_COMPLETE 5711 */ 5712 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5713 5714 // create connection state machine 5715 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5716 5717 if (!connection){ 5718 return BTSTACK_MEMORY_ALLOC_FAILED; 5719 } 5720 5721 // delete linkn key 5722 gap_drop_link_key_for_bd_addr(device); 5723 5724 // configure LEVEL_2/3, dedicated bonding 5725 connection->state = SEND_CREATE_CONNECTION; 5726 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5727 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5728 connection->bonding_flags = BONDING_DEDICATED; 5729 5730 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5731 5732 // handle: connnection failure (connection complete != ok) 5733 // handle: authentication failure 5734 // handle: disconnect on done 5735 5736 hci_run(); 5737 5738 return 0; 5739 } 5740 #endif 5741 5742 void gap_set_local_name(const char * local_name){ 5743 hci_stack->local_name = local_name; 5744 } 5745 5746 5747 #ifdef ENABLE_BLE 5748 5749 #ifdef ENABLE_LE_CENTRAL 5750 void gap_start_scan(void){ 5751 hci_stack->le_scanning_enabled = true; 5752 hci_run(); 5753 } 5754 5755 void gap_stop_scan(void){ 5756 hci_stack->le_scanning_enabled = false; 5757 hci_run(); 5758 } 5759 5760 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5761 hci_stack->le_scan_type = scan_type; 5762 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5763 hci_stack->le_scan_interval = scan_interval; 5764 hci_stack->le_scan_window = scan_window; 5765 hci_stack->le_scanning_param_update = true; 5766 hci_run(); 5767 } 5768 5769 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5770 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5771 } 5772 5773 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5774 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5775 if (!conn){ 5776 // disallow if le connection is already outgoing 5777 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5778 log_error("le connection already active"); 5779 return ERROR_CODE_COMMAND_DISALLOWED; 5780 } 5781 5782 log_info("gap_connect: no connection exists yet, creating context"); 5783 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5784 if (!conn){ 5785 // notify client that alloc failed 5786 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5787 log_info("gap_connect: failed to alloc hci_connection_t"); 5788 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5789 } 5790 5791 // set le connecting state 5792 if (hci_is_le_connection_type(addr_type)){ 5793 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5794 } 5795 5796 conn->state = SEND_CREATE_CONNECTION; 5797 log_info("gap_connect: send create connection next"); 5798 hci_run(); 5799 return ERROR_CODE_SUCCESS; 5800 } 5801 5802 if (!hci_is_le_connection(conn) || 5803 (conn->state == SEND_CREATE_CONNECTION) || 5804 (conn->state == SENT_CREATE_CONNECTION)) { 5805 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5806 log_error("gap_connect: classic connection or connect is already being created"); 5807 return GATT_CLIENT_IN_WRONG_STATE; 5808 } 5809 5810 // check if connection was just disconnected 5811 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5812 log_info("gap_connect: send create connection (again)"); 5813 conn->state = SEND_CREATE_CONNECTION; 5814 hci_run(); 5815 return ERROR_CODE_SUCCESS; 5816 } 5817 5818 log_info("gap_connect: context exists with state %u", conn->state); 5819 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5820 hci_run(); 5821 return ERROR_CODE_SUCCESS; 5822 } 5823 5824 // @assumption: only a single outgoing LE Connection exists 5825 static hci_connection_t * gap_get_outgoing_connection(void){ 5826 btstack_linked_item_t *it; 5827 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5828 hci_connection_t * conn = (hci_connection_t *) it; 5829 if (!hci_is_le_connection(conn)) continue; 5830 switch (conn->state){ 5831 case SEND_CREATE_CONNECTION: 5832 case SENT_CREATE_CONNECTION: 5833 case SENT_CANCEL_CONNECTION: 5834 return conn; 5835 default: 5836 break; 5837 }; 5838 } 5839 return NULL; 5840 } 5841 5842 uint8_t gap_connect_cancel(void){ 5843 hci_connection_t * conn = gap_get_outgoing_connection(); 5844 if (!conn) return 0; 5845 switch (conn->state){ 5846 case SEND_CREATE_CONNECTION: 5847 // skip sending create connection and emit event instead 5848 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5849 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5850 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5851 btstack_memory_hci_connection_free( conn ); 5852 break; 5853 case SENT_CREATE_CONNECTION: 5854 // request to send cancel connection 5855 conn->state = SEND_CANCEL_CONNECTION; 5856 hci_run(); 5857 break; 5858 default: 5859 break; 5860 } 5861 return 0; 5862 } 5863 #endif 5864 5865 #ifdef ENABLE_LE_CENTRAL 5866 /** 5867 * @brief Set connection parameters for outgoing connections 5868 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5869 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5870 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5871 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5872 * @param conn_latency, default: 4 5873 * @param supervision_timeout (unit: 10ms), default: 720 ms 5874 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5875 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5876 */ 5877 5878 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5879 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5880 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5881 hci_stack->le_connection_scan_interval = conn_scan_interval; 5882 hci_stack->le_connection_scan_window = conn_scan_window; 5883 hci_stack->le_connection_interval_min = conn_interval_min; 5884 hci_stack->le_connection_interval_max = conn_interval_max; 5885 hci_stack->le_connection_latency = conn_latency; 5886 hci_stack->le_supervision_timeout = supervision_timeout; 5887 hci_stack->le_minimum_ce_length = min_ce_length; 5888 hci_stack->le_maximum_ce_length = max_ce_length; 5889 } 5890 #endif 5891 5892 /** 5893 * @brief Updates the connection parameters for a given LE connection 5894 * @param handle 5895 * @param conn_interval_min (unit: 1.25ms) 5896 * @param conn_interval_max (unit: 1.25ms) 5897 * @param conn_latency 5898 * @param supervision_timeout (unit: 10ms) 5899 * @returns 0 if ok 5900 */ 5901 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5902 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5903 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5904 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5905 connection->le_conn_interval_min = conn_interval_min; 5906 connection->le_conn_interval_max = conn_interval_max; 5907 connection->le_conn_latency = conn_latency; 5908 connection->le_supervision_timeout = supervision_timeout; 5909 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5910 hci_run(); 5911 return 0; 5912 } 5913 5914 /** 5915 * @brief Request an update of the connection parameter for a given LE connection 5916 * @param handle 5917 * @param conn_interval_min (unit: 1.25ms) 5918 * @param conn_interval_max (unit: 1.25ms) 5919 * @param conn_latency 5920 * @param supervision_timeout (unit: 10ms) 5921 * @returns 0 if ok 5922 */ 5923 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5924 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5925 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5926 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5927 connection->le_conn_interval_min = conn_interval_min; 5928 connection->le_conn_interval_max = conn_interval_max; 5929 connection->le_conn_latency = conn_latency; 5930 connection->le_supervision_timeout = supervision_timeout; 5931 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5932 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5933 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5934 return 0; 5935 } 5936 5937 #ifdef ENABLE_LE_PERIPHERAL 5938 5939 /** 5940 * @brief Set Advertisement Data 5941 * @param advertising_data_length 5942 * @param advertising_data (max 31 octets) 5943 * @note data is not copied, pointer has to stay valid 5944 */ 5945 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5946 hci_stack->le_advertisements_data_len = advertising_data_length; 5947 hci_stack->le_advertisements_data = advertising_data; 5948 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5949 hci_run(); 5950 } 5951 5952 /** 5953 * @brief Set Scan Response Data 5954 * @param advertising_data_length 5955 * @param advertising_data (max 31 octets) 5956 * @note data is not copied, pointer has to stay valid 5957 */ 5958 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5959 hci_stack->le_scan_response_data_len = scan_response_data_length; 5960 hci_stack->le_scan_response_data = scan_response_data; 5961 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5962 hci_run(); 5963 } 5964 5965 /** 5966 * @brief Set Advertisement Parameters 5967 * @param adv_int_min 5968 * @param adv_int_max 5969 * @param adv_type 5970 * @param direct_address_type 5971 * @param direct_address 5972 * @param channel_map 5973 * @param filter_policy 5974 * 5975 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5976 */ 5977 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5978 uint8_t direct_address_typ, bd_addr_t direct_address, 5979 uint8_t channel_map, uint8_t filter_policy) { 5980 5981 hci_stack->le_advertisements_interval_min = adv_int_min; 5982 hci_stack->le_advertisements_interval_max = adv_int_max; 5983 hci_stack->le_advertisements_type = adv_type; 5984 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5985 hci_stack->le_advertisements_channel_map = channel_map; 5986 hci_stack->le_advertisements_filter_policy = filter_policy; 5987 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5988 6); 5989 5990 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 5991 hci_run(); 5992 } 5993 5994 /** 5995 * @brief Enable/Disable Advertisements 5996 * @param enabled 5997 */ 5998 void gap_advertisements_enable(int enabled){ 5999 hci_stack->le_advertisements_enabled = enabled != 0; 6000 hci_update_advertisements_enabled_for_current_roles(); 6001 hci_run(); 6002 } 6003 6004 #endif 6005 6006 void hci_le_set_own_address_type(uint8_t own_address_type){ 6007 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6008 if (own_address_type == hci_stack->le_own_addr_type) return; 6009 hci_stack->le_own_addr_type = own_address_type; 6010 6011 #ifdef ENABLE_LE_PERIPHERAL 6012 // update advertisement parameters, too 6013 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6014 hci_run(); 6015 #endif 6016 #ifdef ENABLE_LE_CENTRAL 6017 // note: we don't update scan parameters or modify ongoing connection attempts 6018 #endif 6019 } 6020 6021 #endif 6022 6023 uint8_t gap_disconnect(hci_con_handle_t handle){ 6024 hci_connection_t * conn = hci_connection_for_handle(handle); 6025 if (!conn){ 6026 hci_emit_disconnection_complete(handle, 0); 6027 return 0; 6028 } 6029 // ignore if already disconnected 6030 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6031 return 0; 6032 } 6033 conn->state = SEND_DISCONNECT; 6034 hci_run(); 6035 return 0; 6036 } 6037 6038 int gap_read_rssi(hci_con_handle_t con_handle){ 6039 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6040 if (hci_connection == NULL) return 0; 6041 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6042 hci_run(); 6043 return 1; 6044 } 6045 6046 /** 6047 * @brief Get connection type 6048 * @param con_handle 6049 * @result connection_type 6050 */ 6051 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6052 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6053 if (!conn) return GAP_CONNECTION_INVALID; 6054 switch (conn->address_type){ 6055 case BD_ADDR_TYPE_LE_PUBLIC: 6056 case BD_ADDR_TYPE_LE_RANDOM: 6057 return GAP_CONNECTION_LE; 6058 case BD_ADDR_TYPE_SCO: 6059 return GAP_CONNECTION_SCO; 6060 case BD_ADDR_TYPE_ACL: 6061 return GAP_CONNECTION_ACL; 6062 default: 6063 return GAP_CONNECTION_INVALID; 6064 } 6065 } 6066 6067 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6068 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6069 if (!conn) return HCI_ROLE_INVALID; 6070 return (hci_role_t) conn->role; 6071 } 6072 6073 6074 #ifdef ENABLE_CLASSIC 6075 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6076 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6077 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6078 conn->request_role = role; 6079 hci_run(); 6080 return ERROR_CODE_SUCCESS; 6081 } 6082 #endif 6083 6084 #ifdef ENABLE_BLE 6085 6086 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){ 6087 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6088 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6089 6090 conn->le_phy_update_all_phys = all_phys; 6091 conn->le_phy_update_tx_phys = tx_phys; 6092 conn->le_phy_update_rx_phys = rx_phys; 6093 conn->le_phy_update_phy_options = phy_options; 6094 6095 hci_run(); 6096 6097 return 0; 6098 } 6099 6100 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6101 // check if already in list 6102 btstack_linked_list_iterator_t it; 6103 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6104 while (btstack_linked_list_iterator_has_next(&it)) { 6105 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6106 if (entry->address_type != address_type) { 6107 continue; 6108 } 6109 if (memcmp(entry->address, address, 6) != 0) { 6110 continue; 6111 } 6112 // disallow if already scheduled to add 6113 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6114 return ERROR_CODE_COMMAND_DISALLOWED; 6115 } 6116 // still on controller, but scheduled to remove -> re-add 6117 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6118 return ERROR_CODE_SUCCESS; 6119 } 6120 // alloc and add to list 6121 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6122 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6123 entry->address_type = address_type; 6124 (void)memcpy(entry->address, address, 6); 6125 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6126 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6127 return ERROR_CODE_SUCCESS; 6128 } 6129 6130 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6131 btstack_linked_list_iterator_t it; 6132 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6133 while (btstack_linked_list_iterator_has_next(&it)){ 6134 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6135 if (entry->address_type != address_type) { 6136 continue; 6137 } 6138 if (memcmp(entry->address, address, 6) != 0) { 6139 continue; 6140 } 6141 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6142 // remove from controller if already present 6143 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6144 } else { 6145 // directly remove entry from whitelist 6146 btstack_linked_list_iterator_remove(&it); 6147 btstack_memory_whitelist_entry_free(entry); 6148 } 6149 return ERROR_CODE_SUCCESS; 6150 } 6151 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6152 } 6153 6154 static void hci_whitelist_clear(void){ 6155 btstack_linked_list_iterator_t it; 6156 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6157 while (btstack_linked_list_iterator_has_next(&it)){ 6158 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6159 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6160 // remove from controller if already present 6161 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6162 continue; 6163 } 6164 // directly remove entry from whitelist 6165 btstack_linked_list_iterator_remove(&it); 6166 btstack_memory_whitelist_entry_free(entry); 6167 } 6168 } 6169 6170 /** 6171 * @brief Clear Whitelist 6172 * @returns 0 if ok 6173 */ 6174 uint8_t gap_whitelist_clear(void){ 6175 hci_whitelist_clear(); 6176 hci_run(); 6177 return ERROR_CODE_SUCCESS; 6178 } 6179 6180 /** 6181 * @brief Add Device to Whitelist 6182 * @param address_typ 6183 * @param address 6184 * @returns 0 if ok 6185 */ 6186 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6187 uint8_t status = hci_whitelist_add(address_type, address); 6188 if (status){ 6189 return status; 6190 } 6191 hci_run(); 6192 return ERROR_CODE_SUCCESS; 6193 } 6194 6195 /** 6196 * @brief Remove Device from Whitelist 6197 * @param address_typ 6198 * @param address 6199 * @returns 0 if ok 6200 */ 6201 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6202 uint8_t status = hci_whitelist_remove(address_type, address); 6203 if (status){ 6204 return status; 6205 } 6206 hci_run(); 6207 return ERROR_CODE_SUCCESS; 6208 } 6209 6210 #ifdef ENABLE_LE_CENTRAL 6211 /** 6212 * @brief Connect with Whitelist 6213 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6214 * @returns - if ok 6215 */ 6216 uint8_t gap_connect_with_whitelist(void){ 6217 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6218 return ERROR_CODE_COMMAND_DISALLOWED; 6219 } 6220 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6221 hci_run(); 6222 return ERROR_CODE_SUCCESS; 6223 } 6224 6225 /** 6226 * @brief Auto Connection Establishment - Start Connecting to device 6227 * @param address_typ 6228 * @param address 6229 * @returns 0 if ok 6230 */ 6231 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6232 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6233 return ERROR_CODE_COMMAND_DISALLOWED; 6234 } 6235 6236 uint8_t status = hci_whitelist_add(address_type, address); 6237 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6238 return status; 6239 } 6240 6241 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6242 6243 hci_run(); 6244 return ERROR_CODE_SUCCESS; 6245 } 6246 6247 /** 6248 * @brief Auto Connection Establishment - Stop Connecting to device 6249 * @param address_typ 6250 * @param address 6251 * @returns 0 if ok 6252 */ 6253 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6254 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6255 return ERROR_CODE_COMMAND_DISALLOWED; 6256 } 6257 6258 hci_whitelist_remove(address_type, address); 6259 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6260 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6261 } 6262 hci_run(); 6263 return 0; 6264 } 6265 6266 /** 6267 * @brief Auto Connection Establishment - Stop everything 6268 * @note Convenience function to stop all active auto connection attempts 6269 */ 6270 uint8_t gap_auto_connection_stop_all(void){ 6271 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6272 return ERROR_CODE_COMMAND_DISALLOWED; 6273 } 6274 hci_whitelist_clear(); 6275 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6276 hci_run(); 6277 return ERROR_CODE_SUCCESS; 6278 } 6279 6280 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6281 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6282 if (!conn) return 0; 6283 return conn->le_connection_interval; 6284 } 6285 #endif 6286 #endif 6287 6288 #ifdef ENABLE_CLASSIC 6289 /** 6290 * @brief Set Extended Inquiry Response data 6291 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6292 * @note has to be done before stack starts up 6293 */ 6294 void gap_set_extended_inquiry_response(const uint8_t * data){ 6295 hci_stack->eir_data = data; 6296 } 6297 6298 /** 6299 * @brief Start GAP Classic Inquiry 6300 * @param duration in 1.28s units 6301 * @return 0 if ok 6302 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6303 */ 6304 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6305 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6306 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6307 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6308 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6309 } 6310 hci_stack->inquiry_state = duration_in_1280ms_units; 6311 hci_run(); 6312 return 0; 6313 } 6314 6315 /** 6316 * @brief Stop GAP Classic Inquiry 6317 * @returns 0 if ok 6318 */ 6319 int gap_inquiry_stop(void){ 6320 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6321 // emit inquiry complete event, before it even started 6322 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6323 hci_emit_event(event, sizeof(event), 1); 6324 return 0; 6325 } 6326 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6327 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6328 hci_run(); 6329 return 0; 6330 } 6331 6332 void gap_inquiry_set_lap(uint32_t lap){ 6333 hci_stack->inquiry_lap = lap; 6334 } 6335 6336 6337 /** 6338 * @brief Remote Name Request 6339 * @param addr 6340 * @param page_scan_repetition_mode 6341 * @param clock_offset only used when bit 15 is set 6342 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6343 */ 6344 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6345 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6346 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6347 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6348 hci_stack->remote_name_clock_offset = clock_offset; 6349 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6350 hci_run(); 6351 return 0; 6352 } 6353 6354 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6355 hci_stack->gap_pairing_state = state; 6356 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6357 hci_run(); 6358 return 0; 6359 } 6360 6361 /** 6362 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6363 * @param addr 6364 * @param pin_data 6365 * @param pin_len 6366 * @return 0 if ok 6367 */ 6368 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6369 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6370 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6371 hci_stack->gap_pairing_pin_len = pin_len; 6372 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6373 } 6374 6375 /** 6376 * @brief Legacy Pairing Pin Code Response 6377 * @param addr 6378 * @param pin 6379 * @return 0 if ok 6380 */ 6381 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6382 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6383 } 6384 6385 /** 6386 * @brief Abort Legacy Pairing 6387 * @param addr 6388 * @param pin 6389 * @return 0 if ok 6390 */ 6391 int gap_pin_code_negative(bd_addr_t addr){ 6392 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6393 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6394 } 6395 6396 /** 6397 * @brief SSP Passkey Response 6398 * @param addr 6399 * @param passkey 6400 * @return 0 if ok 6401 */ 6402 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6403 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6404 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6405 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6406 } 6407 6408 /** 6409 * @brief Abort SSP Passkey Entry/Pairing 6410 * @param addr 6411 * @param pin 6412 * @return 0 if ok 6413 */ 6414 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6415 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6416 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6417 } 6418 6419 /** 6420 * @brief Accept SSP Numeric Comparison 6421 * @param addr 6422 * @param passkey 6423 * @return 0 if ok 6424 */ 6425 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6426 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6427 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6428 } 6429 6430 /** 6431 * @brief Abort SSP Numeric Comparison/Pairing 6432 * @param addr 6433 * @param pin 6434 * @return 0 if ok 6435 */ 6436 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6437 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6438 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6439 } 6440 6441 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6442 6443 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6444 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6445 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6446 connectionSetAuthenticationFlags(conn, flag); 6447 hci_run(); 6448 return ERROR_CODE_SUCCESS; 6449 } 6450 6451 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6452 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6453 } 6454 6455 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6456 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6457 } 6458 #endif 6459 6460 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6461 /** 6462 * @brief Report Remote OOB Data 6463 * @param bd_addr 6464 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6465 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6466 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6467 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6468 */ 6469 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){ 6470 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6471 if (connection == NULL) { 6472 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6473 } 6474 connection->classic_oob_c_192 = c_192; 6475 connection->classic_oob_r_192 = r_192; 6476 6477 // ignore P-256 if not supported by us 6478 if (hci_stack->secure_connections_active){ 6479 connection->classic_oob_c_256 = c_256; 6480 connection->classic_oob_r_256 = r_256; 6481 } 6482 6483 return ERROR_CODE_SUCCESS; 6484 } 6485 /** 6486 * @brief Generate new OOB data 6487 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6488 */ 6489 void gap_ssp_generate_oob_data(void){ 6490 hci_stack->classic_read_local_oob_data = true; 6491 hci_run(); 6492 } 6493 6494 #endif 6495 6496 /** 6497 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6498 * @param inquiry_mode see bluetooth_defines.h 6499 */ 6500 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6501 hci_stack->inquiry_mode = inquiry_mode; 6502 } 6503 6504 /** 6505 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6506 */ 6507 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6508 hci_stack->sco_voice_setting = voice_setting; 6509 } 6510 6511 /** 6512 * @brief Get SCO Voice Setting 6513 * @return current voice setting 6514 */ 6515 uint16_t hci_get_sco_voice_setting(void){ 6516 return hci_stack->sco_voice_setting; 6517 } 6518 6519 static int hci_have_usb_transport(void){ 6520 if (!hci_stack->hci_transport) return 0; 6521 const char * transport_name = hci_stack->hci_transport->name; 6522 if (!transport_name) return 0; 6523 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6524 } 6525 6526 /** @brief Get SCO packet length for current SCO Voice setting 6527 * @note Using SCO packets of the exact length is required for USB transfer 6528 * @return Length of SCO packets in bytes (not audio frames) 6529 */ 6530 uint16_t hci_get_sco_packet_length(void){ 6531 uint16_t sco_packet_length = 0; 6532 6533 #ifdef ENABLE_SCO_OVER_HCI 6534 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6535 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6536 6537 if (hci_have_usb_transport()){ 6538 // see Core Spec for H2 USB Transfer. 6539 // 3 byte SCO header + 24 bytes per connection 6540 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6541 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6542 } else { 6543 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6544 sco_packet_length = 3 + 60 * multiplier; 6545 // assert that it still fits inside an SCO buffer 6546 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6547 sco_packet_length = 3 + 60; 6548 } 6549 } 6550 #endif 6551 6552 #ifdef HAVE_SCO_TRANSPORT 6553 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6554 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6555 sco_packet_length = 3 + 60 * multiplier; 6556 #endif 6557 return sco_packet_length; 6558 } 6559 6560 /** 6561 * @brief Sets the master/slave policy 6562 * @param policy (0: attempt to become master, 1: let connecting device decide) 6563 */ 6564 void hci_set_master_slave_policy(uint8_t policy){ 6565 hci_stack->master_slave_policy = policy; 6566 } 6567 6568 #endif 6569 6570 HCI_STATE hci_get_state(void){ 6571 return hci_stack->state; 6572 } 6573 6574 #ifdef ENABLE_CLASSIC 6575 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6576 hci_stack->gap_classic_accept_callback = accept_callback; 6577 } 6578 #endif 6579 6580 /** 6581 * @brief Set callback for Bluetooth Hardware Error 6582 */ 6583 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6584 hci_stack->hardware_error_callback = fn; 6585 } 6586 6587 void hci_disconnect_all(void){ 6588 btstack_linked_list_iterator_t it; 6589 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6590 while (btstack_linked_list_iterator_has_next(&it)){ 6591 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6592 if (con->state == SENT_DISCONNECT) continue; 6593 con->state = SEND_DISCONNECT; 6594 } 6595 hci_run(); 6596 } 6597 6598 uint16_t hci_get_manufacturer(void){ 6599 return hci_stack->manufacturer; 6600 } 6601 6602 #ifdef ENABLE_BLE 6603 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6604 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6605 if (!hci_con) return NULL; 6606 return &hci_con->sm_connection; 6607 } 6608 6609 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6610 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6611 #endif 6612 6613 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6614 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6615 if (hci_connection == NULL) return 0; 6616 if (hci_is_le_connection(hci_connection)){ 6617 #ifdef ENABLE_BLE 6618 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6619 if (sm_conn->sm_connection_encrypted) { 6620 return sm_conn->sm_actual_encryption_key_size; 6621 } 6622 #endif 6623 } else { 6624 #ifdef ENABLE_CLASSIC 6625 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6626 return hci_connection->encryption_key_size; 6627 } 6628 #endif 6629 } 6630 return 0; 6631 } 6632 6633 int gap_authenticated(hci_con_handle_t con_handle){ 6634 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6635 if (hci_connection == NULL) return 0; 6636 6637 switch (hci_connection->address_type){ 6638 #ifdef ENABLE_BLE 6639 case BD_ADDR_TYPE_LE_PUBLIC: 6640 case BD_ADDR_TYPE_LE_RANDOM: 6641 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6642 return hci_connection->sm_connection.sm_connection_authenticated; 6643 #endif 6644 #ifdef ENABLE_CLASSIC 6645 case BD_ADDR_TYPE_SCO: 6646 case BD_ADDR_TYPE_ACL: 6647 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6648 #endif 6649 default: 6650 return 0; 6651 } 6652 } 6653 6654 int gap_secure_connection(hci_con_handle_t con_handle){ 6655 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6656 if (hci_connection == NULL) return 0; 6657 6658 switch (hci_connection->address_type){ 6659 #ifdef ENABLE_BLE 6660 case BD_ADDR_TYPE_LE_PUBLIC: 6661 case BD_ADDR_TYPE_LE_RANDOM: 6662 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6663 return hci_connection->sm_connection.sm_connection_sc; 6664 #endif 6665 #ifdef ENABLE_CLASSIC 6666 case BD_ADDR_TYPE_SCO: 6667 case BD_ADDR_TYPE_ACL: 6668 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6669 #endif 6670 default: 6671 return 0; 6672 } 6673 } 6674 6675 bool gap_bonded(hci_con_handle_t con_handle){ 6676 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6677 if (hci_connection == NULL) return 0; 6678 6679 #ifdef ENABLE_CLASSIC 6680 link_key_t link_key; 6681 link_key_type_t link_key_type; 6682 #endif 6683 switch (hci_connection->address_type){ 6684 #ifdef ENABLE_BLE 6685 case BD_ADDR_TYPE_LE_PUBLIC: 6686 case BD_ADDR_TYPE_LE_RANDOM: 6687 return hci_connection->sm_connection.sm_le_db_index >= 0; 6688 #endif 6689 #ifdef ENABLE_CLASSIC 6690 case BD_ADDR_TYPE_SCO: 6691 case BD_ADDR_TYPE_ACL: 6692 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6693 #endif 6694 default: 6695 return false; 6696 } 6697 } 6698 6699 #ifdef ENABLE_BLE 6700 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6701 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6702 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6703 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6704 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6705 return sm_conn->sm_connection_authorization_state; 6706 } 6707 #endif 6708 6709 #ifdef ENABLE_CLASSIC 6710 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){ 6711 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6712 if (!conn) return GAP_CONNECTION_INVALID; 6713 conn->sniff_min_interval = sniff_min_interval; 6714 conn->sniff_max_interval = sniff_max_interval; 6715 conn->sniff_attempt = sniff_attempt; 6716 conn->sniff_timeout = sniff_timeout; 6717 hci_run(); 6718 return 0; 6719 } 6720 6721 /** 6722 * @brief Exit Sniff mode 6723 * @param con_handle 6724 @ @return 0 if ok 6725 */ 6726 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6727 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6728 if (!conn) return GAP_CONNECTION_INVALID; 6729 conn->sniff_min_interval = 0xffff; 6730 hci_run(); 6731 return 0; 6732 } 6733 6734 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){ 6735 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6736 if (!conn) return GAP_CONNECTION_INVALID; 6737 conn->sniff_subrating_max_latency = max_latency; 6738 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6739 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6740 hci_run(); 6741 return ERROR_CODE_SUCCESS; 6742 } 6743 6744 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){ 6745 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6746 if (!conn) return GAP_CONNECTION_INVALID; 6747 conn->qos_service_type = service_type; 6748 conn->qos_token_rate = token_rate; 6749 conn->qos_peak_bandwidth = peak_bandwidth; 6750 conn->qos_latency = latency; 6751 conn->qos_delay_variation = delay_variation; 6752 hci_run(); 6753 return ERROR_CODE_SUCCESS; 6754 } 6755 6756 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6757 hci_stack->new_page_scan_interval = page_scan_interval; 6758 hci_stack->new_page_scan_window = page_scan_window; 6759 hci_run(); 6760 } 6761 6762 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6763 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6764 hci_run(); 6765 } 6766 6767 #endif 6768 6769 void hci_halting_defer(void){ 6770 if (hci_stack->state != HCI_STATE_HALTING) return; 6771 switch (hci_stack->substate){ 6772 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6773 case HCI_HALTING_CLOSE: 6774 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6775 break; 6776 default: 6777 break; 6778 } 6779 } 6780 6781 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6782 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6783 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6784 if (le_device_db_index >= le_device_db_max_count()) return; 6785 uint8_t offset = le_device_db_index >> 3; 6786 uint8_t mask = 1 << (le_device_db_index & 7); 6787 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6788 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6789 // note: go back to remove entries, otherwise, a remove + add will skip the add 6790 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6791 } 6792 } 6793 6794 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6795 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6796 if (le_device_db_index >= le_device_db_max_count()) return; 6797 uint8_t offset = le_device_db_index >> 3; 6798 uint8_t mask = 1 << (le_device_db_index & 7); 6799 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6800 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6801 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6802 } 6803 } 6804 6805 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6806 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6807 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6808 } 6809 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6810 // restart le resolving list update 6811 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6812 } 6813 return ERROR_CODE_SUCCESS; 6814 } 6815 #endif 6816 6817 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6818 void hci_setup_test_connections_fuzz(void){ 6819 hci_connection_t * conn; 6820 6821 // default address: 66:55:44:33:00:01 6822 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6823 6824 // setup Controller info 6825 hci_stack->num_cmd_packets = 255; 6826 hci_stack->acl_packets_total_num = 255; 6827 6828 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6829 addr[5] = 0x01; 6830 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6831 conn->con_handle = addr[5]; 6832 conn->role = HCI_ROLE_SLAVE; 6833 conn->state = RECEIVED_CONNECTION_REQUEST; 6834 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6835 6836 // setup incoming Classic SCO connection with con handle 0x0002 6837 addr[5] = 0x02; 6838 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6839 conn->con_handle = addr[5]; 6840 conn->role = HCI_ROLE_SLAVE; 6841 conn->state = RECEIVED_CONNECTION_REQUEST; 6842 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6843 6844 // setup ready Classic ACL connection with con handle 0x0003 6845 addr[5] = 0x03; 6846 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6847 conn->con_handle = addr[5]; 6848 conn->role = HCI_ROLE_SLAVE; 6849 conn->state = OPEN; 6850 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6851 6852 // setup ready Classic SCO connection with con handle 0x0004 6853 addr[5] = 0x04; 6854 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6855 conn->con_handle = addr[5]; 6856 conn->role = HCI_ROLE_SLAVE; 6857 conn->state = OPEN; 6858 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6859 6860 // setup ready LE ACL connection with con handle 0x005 and public address 6861 addr[5] = 0x05; 6862 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6863 conn->con_handle = addr[5]; 6864 conn->role = HCI_ROLE_SLAVE; 6865 conn->state = OPEN; 6866 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6867 conn->sm_connection.sm_connection_encrypted = 1; 6868 } 6869 6870 void hci_free_connections_fuzz(void){ 6871 btstack_linked_list_iterator_t it; 6872 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6873 while (btstack_linked_list_iterator_has_next(&it)){ 6874 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6875 btstack_linked_list_iterator_remove(&it); 6876 btstack_memory_hci_connection_free(con); 6877 } 6878 } 6879 void hci_simulate_working_fuzz(void){ 6880 hci_init_done(); 6881 hci_stack->num_cmd_packets = 255; 6882 } 6883 #endif 6884