1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #include "ble/le_device_db.h" 63 #endif 64 65 #include <stdarg.h> 66 #include <string.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 98 #endif 99 100 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 101 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 102 #endif 103 104 #define HCI_CONNECTION_TIMEOUT_MS 10000 105 106 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 107 #define HCI_RESET_RESEND_TIMEOUT_MS 200 108 #endif 109 110 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 111 #ifndef GAP_INQUIRY_MAX_NAME_LEN 112 #define GAP_INQUIRY_MAX_NAME_LEN 32 113 #endif 114 115 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 116 #define GAP_INQUIRY_DURATION_MIN 0x01 117 #define GAP_INQUIRY_DURATION_MAX 0x30 118 #define GAP_INQUIRY_STATE_IDLE 0x00 119 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 120 #define GAP_INQUIRY_STATE_ACTIVE 0x81 121 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 122 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 123 124 // GAP Remote Name Request 125 #define GAP_REMOTE_NAME_STATE_IDLE 0 126 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 127 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 128 129 // GAP Pairing 130 #define GAP_PAIRING_STATE_IDLE 0 131 #define GAP_PAIRING_STATE_SEND_PIN 1 132 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 133 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 134 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 135 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 136 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 137 138 139 // prototypes 140 #ifdef ENABLE_CLASSIC 141 static void hci_update_scan_enable(void); 142 static void hci_emit_discoverable_enabled(uint8_t enabled); 143 static int hci_local_ssp_activated(void); 144 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 145 static bool hci_ssp_supported(hci_connection_t * connection); 146 static void hci_notify_if_sco_can_send_now(void); 147 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 148 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 149 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 150 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 151 static void hci_connection_timestamp(hci_connection_t *connection); 152 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 153 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 154 #endif 155 156 static int hci_power_control_on(void); 157 static void hci_power_control_off(void); 158 static void hci_state_reset(void); 159 static void hci_emit_transport_packet_sent(void); 160 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 161 static void hci_emit_nr_connections_changed(void); 162 static void hci_emit_hci_open_failed(void); 163 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 164 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 165 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 166 static void hci_run(void); 167 static int hci_is_le_connection(hci_connection_t * connection); 168 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 169 170 #ifdef ENABLE_CLASSIC 171 static int hci_have_usb_transport(void); 172 #endif 173 174 #ifdef ENABLE_BLE 175 #ifdef ENABLE_LE_CENTRAL 176 // called from test/ble_client/advertising_data_parser.c 177 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 178 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 179 static hci_connection_t * gap_get_outgoing_connection(void); 180 #endif 181 #endif 182 183 // the STACK is here 184 #ifndef HAVE_MALLOC 185 static hci_stack_t hci_stack_static; 186 #endif 187 static hci_stack_t * hci_stack = NULL; 188 189 #ifdef ENABLE_CLASSIC 190 // default name 191 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 192 193 // test helper 194 static uint8_t disable_l2cap_timeouts = 0; 195 #endif 196 197 /** 198 * create connection for given address 199 * 200 * @return connection OR NULL, if no memory left 201 */ 202 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 203 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 204 hci_connection_t * conn = btstack_memory_hci_connection_get(); 205 if (!conn) return NULL; 206 bd_addr_copy(conn->address, addr); 207 conn->role = HCI_ROLE_INVALID; 208 conn->address_type = addr_type; 209 conn->con_handle = 0xffff; 210 conn->authentication_flags = AUTH_FLAGS_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 & 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 |= SSP_PAIRING_ACTIVE; 402 } else { 403 hci_connection->authentication_flags |= 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 log_info("pairing started, ssp %u, initiator %u", (int) ssp, (int) initiator); 409 } 410 411 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 412 if (!hci_pairing_active(hci_connection)) return; 413 hci_connection->authentication_flags &= ~PAIRING_ACTIVE_MASK; 414 log_info("pairing complete, status %02x", status); 415 } 416 417 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 418 hci_connection_t * conn = hci_connection_for_handle(handle); 419 if (!conn) return 0; 420 return (int) hci_pairing_active(conn); 421 } 422 423 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 424 if (!hci_stack->link_key_db) return; 425 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 426 hci_stack->link_key_db->delete_link_key(addr); 427 } 428 429 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 430 if (!hci_stack->link_key_db) return; 431 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 432 hci_stack->link_key_db->put_link_key(addr, link_key, type); 433 } 434 435 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 436 if (!hci_stack->link_key_db) return false; 437 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 438 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 439 return result; 440 } 441 442 void gap_delete_all_link_keys(void){ 443 bd_addr_t addr; 444 link_key_t link_key; 445 link_key_type_t type; 446 btstack_link_key_iterator_t it; 447 int ok = gap_link_key_iterator_init(&it); 448 if (!ok) { 449 log_error("could not initialize iterator"); 450 return; 451 } 452 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 453 gap_drop_link_key_for_bd_addr(addr); 454 } 455 gap_link_key_iterator_done(&it); 456 } 457 458 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 459 if (!hci_stack->link_key_db) return 0; 460 if (!hci_stack->link_key_db->iterator_init) return 0; 461 return hci_stack->link_key_db->iterator_init(it); 462 } 463 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){ 464 if (!hci_stack->link_key_db) return 0; 465 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 466 } 467 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 468 if (!hci_stack->link_key_db) return; 469 hci_stack->link_key_db->iterator_done(it); 470 } 471 #endif 472 473 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 474 switch (address_type){ 475 case BD_ADDR_TYPE_LE_PUBLIC: 476 case BD_ADDR_TYPE_LE_RANDOM: 477 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 478 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 479 return true; 480 default: 481 return false; 482 } 483 } 484 485 static int hci_is_le_connection(hci_connection_t * connection){ 486 return hci_is_le_connection_type(connection->address_type); 487 } 488 489 /** 490 * count connections 491 */ 492 static int nr_hci_connections(void){ 493 int count = 0; 494 btstack_linked_item_t *it; 495 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 496 count++; 497 } 498 return count; 499 } 500 501 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 502 503 unsigned int num_packets_sent_classic = 0; 504 unsigned int num_packets_sent_le = 0; 505 506 btstack_linked_item_t *it; 507 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 508 hci_connection_t * connection = (hci_connection_t *) it; 509 if (hci_is_le_connection(connection)){ 510 num_packets_sent_le += connection->num_packets_sent; 511 } 512 if (connection->address_type == BD_ADDR_TYPE_ACL){ 513 num_packets_sent_classic += connection->num_packets_sent; 514 } 515 } 516 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 517 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 518 int free_slots_le = 0; 519 520 if (free_slots_classic < 0){ 521 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); 522 return 0; 523 } 524 525 if (hci_stack->le_acl_packets_total_num){ 526 // if we have LE slots, they are used 527 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 528 if (free_slots_le < 0){ 529 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); 530 return 0; 531 } 532 } else { 533 // otherwise, classic slots are used for LE, too 534 free_slots_classic -= num_packets_sent_le; 535 if (free_slots_classic < 0){ 536 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); 537 return 0; 538 } 539 } 540 541 switch (address_type){ 542 case BD_ADDR_TYPE_UNKNOWN: 543 log_error("hci_number_free_acl_slots: unknown address type"); 544 return 0; 545 546 case BD_ADDR_TYPE_ACL: 547 return free_slots_classic; 548 549 default: 550 if (hci_stack->le_acl_packets_total_num){ 551 return free_slots_le; 552 } 553 return free_slots_classic; 554 } 555 } 556 557 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 558 // get connection type 559 hci_connection_t * connection = hci_connection_for_handle(con_handle); 560 if (!connection){ 561 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 562 return 0; 563 } 564 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 565 } 566 567 #ifdef ENABLE_CLASSIC 568 static int hci_number_free_sco_slots(void){ 569 unsigned int num_sco_packets_sent = 0; 570 btstack_linked_item_t *it; 571 if (hci_stack->synchronous_flow_control_enabled){ 572 // explicit flow control 573 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 574 hci_connection_t * connection = (hci_connection_t *) it; 575 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 576 num_sco_packets_sent += connection->num_packets_sent; 577 } 578 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 579 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 580 return 0; 581 } 582 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 583 } else { 584 // implicit flow control -- TODO 585 int num_ready = 0; 586 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 587 hci_connection_t * connection = (hci_connection_t *) it; 588 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 589 if (connection->sco_tx_ready == 0) continue; 590 num_ready++; 591 } 592 return num_ready; 593 } 594 } 595 #endif 596 597 // only used to send HCI Host Number Completed Packets 598 static int hci_can_send_comand_packet_transport(void){ 599 if (hci_stack->hci_packet_buffer_reserved) return 0; 600 601 // check for async hci transport implementations 602 if (hci_stack->hci_transport->can_send_packet_now){ 603 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 604 return 0; 605 } 606 } 607 return 1; 608 } 609 610 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 611 int hci_can_send_command_packet_now(void){ 612 if (hci_can_send_comand_packet_transport() == 0) return 0; 613 return hci_stack->num_cmd_packets > 0u; 614 } 615 616 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 617 // check for async hci transport implementations 618 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 619 return hci_stack->hci_transport->can_send_packet_now(packet_type); 620 } 621 622 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 623 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 624 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 625 } 626 627 int hci_can_send_acl_le_packet_now(void){ 628 if (hci_stack->hci_packet_buffer_reserved) return 0; 629 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 630 } 631 632 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 633 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 634 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 635 } 636 637 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 638 if (hci_stack->hci_packet_buffer_reserved) return 0; 639 return hci_can_send_prepared_acl_packet_now(con_handle); 640 } 641 642 #ifdef ENABLE_CLASSIC 643 int hci_can_send_acl_classic_packet_now(void){ 644 if (hci_stack->hci_packet_buffer_reserved) return 0; 645 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 646 } 647 648 int hci_can_send_prepared_sco_packet_now(void){ 649 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 650 if (hci_have_usb_transport()){ 651 return hci_stack->sco_can_send_now; 652 } else { 653 return hci_number_free_sco_slots() > 0; 654 } 655 } 656 657 int hci_can_send_sco_packet_now(void){ 658 if (hci_stack->hci_packet_buffer_reserved) return 0; 659 return hci_can_send_prepared_sco_packet_now(); 660 } 661 662 void hci_request_sco_can_send_now_event(void){ 663 hci_stack->sco_waiting_for_can_send_now = 1; 664 hci_notify_if_sco_can_send_now(); 665 } 666 #endif 667 668 // used for internal checks in l2cap.c 669 int hci_is_packet_buffer_reserved(void){ 670 return hci_stack->hci_packet_buffer_reserved; 671 } 672 673 // reserves outgoing packet buffer. @returns 1 if successful 674 int hci_reserve_packet_buffer(void){ 675 if (hci_stack->hci_packet_buffer_reserved) { 676 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 677 return 0; 678 } 679 hci_stack->hci_packet_buffer_reserved = 1; 680 return 1; 681 } 682 683 void hci_release_packet_buffer(void){ 684 hci_stack->hci_packet_buffer_reserved = 0; 685 } 686 687 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 688 static int hci_transport_synchronous(void){ 689 return hci_stack->hci_transport->can_send_packet_now == NULL; 690 } 691 692 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 693 694 // 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); 695 696 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 697 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 698 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 699 max_acl_data_packet_length = hci_stack->le_data_packets_length; 700 } 701 702 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 703 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 704 max_acl_data_packet_length = connection->le_max_tx_octets; 705 } 706 #endif 707 708 log_debug("hci_send_acl_packet_fragments entered"); 709 710 int err; 711 // multiple packets could be send on a synchronous HCI transport 712 while (true){ 713 714 log_debug("hci_send_acl_packet_fragments loop entered"); 715 716 // get current data 717 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 718 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 719 bool more_fragments = false; 720 721 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 722 if (current_acl_data_packet_length > max_acl_data_packet_length){ 723 more_fragments = true; 724 current_acl_data_packet_length = max_acl_data_packet_length; 725 } 726 727 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 728 if (acl_header_pos > 0u){ 729 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 730 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 731 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 732 } 733 734 // update header len 735 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 736 737 // count packet 738 connection->num_packets_sent++; 739 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 740 741 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 742 if (more_fragments){ 743 // update start of next fragment to send 744 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 745 } else { 746 // done 747 hci_stack->acl_fragmentation_pos = 0; 748 hci_stack->acl_fragmentation_total_size = 0; 749 } 750 751 // send packet 752 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 753 const int size = current_acl_data_packet_length + 4; 754 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 755 hci_stack->acl_fragmentation_tx_active = 1; 756 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 757 758 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 759 760 // done yet? 761 if (!more_fragments) break; 762 763 // can send more? 764 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 765 } 766 767 log_debug("hci_send_acl_packet_fragments loop over"); 768 769 // release buffer now for synchronous transport 770 if (hci_transport_synchronous()){ 771 hci_stack->acl_fragmentation_tx_active = 0; 772 hci_release_packet_buffer(); 773 hci_emit_transport_packet_sent(); 774 } 775 776 return err; 777 } 778 779 // pre: caller has reserved the packet buffer 780 int hci_send_acl_packet_buffer(int size){ 781 782 // log_info("hci_send_acl_packet_buffer size %u", size); 783 784 if (!hci_stack->hci_packet_buffer_reserved) { 785 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 786 return 0; 787 } 788 789 uint8_t * packet = hci_stack->hci_packet_buffer; 790 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 791 792 // check for free places on Bluetooth module 793 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 794 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 795 hci_release_packet_buffer(); 796 hci_emit_transport_packet_sent(); 797 return BTSTACK_ACL_BUFFERS_FULL; 798 } 799 800 hci_connection_t *connection = hci_connection_for_handle( con_handle); 801 if (!connection) { 802 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 803 hci_release_packet_buffer(); 804 hci_emit_transport_packet_sent(); 805 return 0; 806 } 807 808 #ifdef ENABLE_CLASSIC 809 hci_connection_timestamp(connection); 810 #endif 811 812 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 813 814 // setup data 815 hci_stack->acl_fragmentation_total_size = size; 816 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 817 818 return hci_send_acl_packet_fragments(connection); 819 } 820 821 #ifdef ENABLE_CLASSIC 822 // pre: caller has reserved the packet buffer 823 int hci_send_sco_packet_buffer(int size){ 824 825 // log_info("hci_send_acl_packet_buffer size %u", size); 826 827 if (!hci_stack->hci_packet_buffer_reserved) { 828 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 829 return 0; 830 } 831 832 uint8_t * packet = hci_stack->hci_packet_buffer; 833 834 // skip checks in loopback mode 835 if (!hci_stack->loopback_mode){ 836 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 837 838 // check for free places on Bluetooth module 839 if (!hci_can_send_prepared_sco_packet_now()) { 840 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 841 hci_release_packet_buffer(); 842 hci_emit_transport_packet_sent(); 843 return BTSTACK_ACL_BUFFERS_FULL; 844 } 845 846 // track send packet in connection struct 847 hci_connection_t *connection = hci_connection_for_handle( con_handle); 848 if (!connection) { 849 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 850 hci_release_packet_buffer(); 851 hci_emit_transport_packet_sent(); 852 return 0; 853 } 854 855 if (hci_have_usb_transport()){ 856 // token used 857 hci_stack->sco_can_send_now = 0; 858 } else { 859 if (hci_stack->synchronous_flow_control_enabled){ 860 connection->num_packets_sent++; 861 } else { 862 connection->sco_tx_ready--; 863 } 864 } 865 } 866 867 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 868 869 #ifdef HAVE_SCO_TRANSPORT 870 hci_stack->sco_transport->send_packet(packet, size); 871 hci_release_packet_buffer(); 872 hci_emit_transport_packet_sent(); 873 874 return 0; 875 #else 876 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 877 if (hci_transport_synchronous()){ 878 hci_release_packet_buffer(); 879 hci_emit_transport_packet_sent(); 880 } 881 882 return err; 883 #endif 884 } 885 #endif 886 887 static void acl_handler(uint8_t *packet, uint16_t size){ 888 889 // get info 890 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 891 hci_connection_t *conn = hci_connection_for_handle(con_handle); 892 uint8_t acl_flags = READ_ACL_FLAGS(packet); 893 uint16_t acl_length = READ_ACL_LENGTH(packet); 894 895 // ignore non-registered handle 896 if (!conn){ 897 log_error("acl_handler called with non-registered handle %u!" , con_handle); 898 return; 899 } 900 901 // assert packet is complete 902 if ((acl_length + 4u) != size){ 903 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 904 return; 905 } 906 907 #ifdef ENABLE_CLASSIC 908 // update idle timestamp 909 hci_connection_timestamp(conn); 910 #endif 911 912 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 913 hci_stack->host_completed_packets = 1; 914 conn->num_packets_completed++; 915 #endif 916 917 // handle different packet types 918 switch (acl_flags & 0x03u) { 919 920 case 0x01: // continuation fragment 921 922 // sanity checks 923 if (conn->acl_recombination_pos == 0u) { 924 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 925 return; 926 } 927 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 928 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 929 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 930 conn->acl_recombination_pos = 0; 931 return; 932 } 933 934 // append fragment payload (header already stored) 935 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 936 &packet[4], acl_length); 937 conn->acl_recombination_pos += acl_length; 938 939 // forward complete L2CAP packet if complete. 940 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 941 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 942 // reset recombination buffer 943 conn->acl_recombination_length = 0; 944 conn->acl_recombination_pos = 0; 945 } 946 break; 947 948 case 0x02: { // first fragment 949 950 // sanity check 951 if (conn->acl_recombination_pos) { 952 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 953 conn->acl_recombination_pos = 0; 954 } 955 956 // peek into L2CAP packet! 957 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 958 959 // compare fragment size to L2CAP packet size 960 if (acl_length >= (l2cap_length + 4u)){ 961 // forward fragment as L2CAP packet 962 hci_emit_acl_packet(packet, acl_length + 4u); 963 } else { 964 965 if (acl_length > HCI_ACL_BUFFER_SIZE){ 966 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 967 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 968 return; 969 } 970 971 // store first fragment and tweak acl length for complete package 972 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 973 packet, acl_length + 4u); 974 conn->acl_recombination_pos = acl_length + 4u; 975 conn->acl_recombination_length = l2cap_length; 976 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 977 } 978 break; 979 980 } 981 default: 982 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 983 return; 984 } 985 986 // execute main loop 987 hci_run(); 988 } 989 990 static void hci_shutdown_connection(hci_connection_t *conn){ 991 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 992 993 #ifdef ENABLE_CLASSIC 994 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 995 bd_addr_type_t addr_type = conn->address_type; 996 #endif 997 #ifdef HAVE_SCO_TRANSPORT 998 hci_con_handle_t con_handle = conn->con_handle; 999 #endif 1000 #endif 1001 1002 btstack_run_loop_remove_timer(&conn->timeout); 1003 1004 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1005 btstack_memory_hci_connection_free( conn ); 1006 1007 // now it's gone 1008 hci_emit_nr_connections_changed(); 1009 1010 #ifdef ENABLE_CLASSIC 1011 #ifdef ENABLE_SCO_OVER_HCI 1012 // update SCO 1013 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1014 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1015 } 1016 #endif 1017 #ifdef HAVE_SCO_TRANSPORT 1018 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1019 hci_stack->sco_transport->close(con_handle); 1020 } 1021 #endif 1022 #endif 1023 } 1024 1025 #ifdef ENABLE_CLASSIC 1026 1027 static const uint16_t packet_type_sizes[] = { 1028 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1029 HCI_ACL_DH1_SIZE, 0, 0, 0, 1030 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1031 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1032 }; 1033 static const uint8_t packet_type_feature_requirement_bit[] = { 1034 0, // 3 slot packets 1035 1, // 5 slot packets 1036 25, // EDR 2 mpbs 1037 26, // EDR 3 mbps 1038 39, // 3 slot EDR packts 1039 40, // 5 slot EDR packet 1040 }; 1041 static const uint16_t packet_type_feature_packet_mask[] = { 1042 0x0f00, // 3 slot packets 1043 0xf000, // 5 slot packets 1044 0x1102, // EDR 2 mpbs 1045 0x2204, // EDR 3 mbps 1046 0x0300, // 3 slot EDR packts 1047 0x3000, // 5 slot EDR packet 1048 }; 1049 1050 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1051 // enable packet types based on size 1052 uint16_t packet_types = 0; 1053 unsigned int i; 1054 for (i=0;i<16;i++){ 1055 if (packet_type_sizes[i] == 0) continue; 1056 if (packet_type_sizes[i] <= buffer_size){ 1057 packet_types |= 1 << i; 1058 } 1059 } 1060 // disable packet types due to missing local supported features 1061 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1062 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1063 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1064 if (feature_set) continue; 1065 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1066 packet_types &= ~packet_type_feature_packet_mask[i]; 1067 } 1068 // flip bits for "may not be used" 1069 packet_types ^= 0x3306; 1070 return packet_types; 1071 } 1072 1073 uint16_t hci_usable_acl_packet_types(void){ 1074 return hci_stack->packet_types; 1075 } 1076 #endif 1077 1078 uint8_t* hci_get_outgoing_packet_buffer(void){ 1079 // hci packet buffer is >= acl data packet length 1080 return hci_stack->hci_packet_buffer; 1081 } 1082 1083 uint16_t hci_max_acl_data_packet_length(void){ 1084 return hci_stack->acl_data_packet_length; 1085 } 1086 1087 #ifdef ENABLE_CLASSIC 1088 int hci_extended_sco_link_supported(void){ 1089 // No. 31, byte 3, bit 7 1090 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1091 } 1092 #endif 1093 1094 int hci_non_flushable_packet_boundary_flag_supported(void){ 1095 // No. 54, byte 6, bit 6 1096 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1097 } 1098 1099 static int gap_ssp_supported(void){ 1100 // No. 51, byte 6, bit 3 1101 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1102 } 1103 1104 static int hci_classic_supported(void){ 1105 #ifdef ENABLE_CLASSIC 1106 // No. 37, byte 4, bit 5, = No BR/EDR Support 1107 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1108 #else 1109 return 0; 1110 #endif 1111 } 1112 1113 static int hci_le_supported(void){ 1114 #ifdef ENABLE_BLE 1115 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1116 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1117 #else 1118 return 0; 1119 #endif 1120 } 1121 1122 #ifdef ENABLE_BLE 1123 1124 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1125 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1126 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1127 } else { 1128 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1129 } 1130 } 1131 1132 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1133 *addr_type = hci_stack->le_own_addr_type; 1134 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1135 } 1136 1137 #ifdef ENABLE_LE_PERIPHERAL 1138 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1139 *addr_type = hci_stack->le_advertisements_own_addr_type; 1140 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1141 }; 1142 #endif 1143 1144 #ifdef ENABLE_LE_CENTRAL 1145 1146 /** 1147 * @brief Get own addr type and address used for LE connections (Central) 1148 */ 1149 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1150 *addr_type = hci_stack->le_connection_own_addr_type; 1151 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1152 } 1153 1154 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1155 1156 int offset = 3; 1157 int num_reports = packet[offset]; 1158 offset += 1; 1159 1160 int i; 1161 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1162 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1163 for (i=0; (i<num_reports) && (offset < size);i++){ 1164 // sanity checks on data_length: 1165 uint8_t data_length = packet[offset + 8]; 1166 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1167 if ((offset + 9u + data_length + 1u) > size) return; 1168 // setup event 1169 uint8_t event_size = 10u + data_length; 1170 int pos = 0; 1171 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1172 event[pos++] = event_size; 1173 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1174 offset += 8; 1175 pos += 8; 1176 event[pos++] = packet[offset + 1 + data_length]; // rssi 1177 event[pos++] = data_length; 1178 offset++; 1179 (void)memcpy(&event[pos], &packet[offset], data_length); 1180 pos += data_length; 1181 offset += data_length + 1u; // rssi 1182 hci_emit_event(event, pos, 1); 1183 } 1184 } 1185 #endif 1186 #endif 1187 1188 #ifdef ENABLE_BLE 1189 #ifdef ENABLE_LE_PERIPHERAL 1190 static void hci_update_advertisements_enabled_for_current_roles(void){ 1191 if (hci_stack->le_advertisements_enabled){ 1192 // get number of active le slave connections 1193 int num_slave_connections = 0; 1194 btstack_linked_list_iterator_t it; 1195 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1196 while (btstack_linked_list_iterator_has_next(&it)){ 1197 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1198 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1199 if (con->state != OPEN) continue; 1200 if (con->role != HCI_ROLE_SLAVE) continue; 1201 if (!hci_is_le_connection(con)) continue; 1202 num_slave_connections++; 1203 } 1204 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1205 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1206 } else { 1207 hci_stack->le_advertisements_enabled_for_current_roles = false; 1208 } 1209 } 1210 #endif 1211 #endif 1212 1213 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1214 1215 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1216 if (!hci_stack->config) return 0; 1217 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1218 // Limit baud rate for Broadcom chipsets to 3 mbps 1219 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1220 baud_rate = 3000000; 1221 } 1222 return baud_rate; 1223 } 1224 1225 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1226 UNUSED(ds); 1227 1228 switch (hci_stack->substate){ 1229 case HCI_INIT_W4_SEND_RESET: 1230 log_info("Resend HCI Reset"); 1231 hci_stack->substate = HCI_INIT_SEND_RESET; 1232 hci_stack->num_cmd_packets = 1; 1233 hci_run(); 1234 break; 1235 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1236 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1237 if (hci_stack->hci_transport->reset_link){ 1238 hci_stack->hci_transport->reset_link(); 1239 } 1240 1241 /* fall through */ 1242 1243 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1244 log_info("Resend HCI Reset - CSR Warm Boot"); 1245 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1246 hci_stack->num_cmd_packets = 1; 1247 hci_run(); 1248 break; 1249 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1250 if (hci_stack->hci_transport->set_baudrate){ 1251 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1252 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1253 hci_stack->hci_transport->set_baudrate(baud_rate); 1254 } 1255 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1256 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1257 if (hci_stack->hci_transport->reset_link){ 1258 log_info("Link Reset"); 1259 hci_stack->hci_transport->reset_link(); 1260 } 1261 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1262 hci_run(); 1263 } 1264 break; 1265 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1266 // otherwise continue 1267 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1268 hci_send_cmd(&hci_read_local_supported_commands); 1269 break; 1270 default: 1271 break; 1272 } 1273 } 1274 #endif 1275 1276 static void hci_initializing_next_state(void){ 1277 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1278 } 1279 1280 // assumption: hci_can_send_command_packet_now() == true 1281 static void hci_initializing_run(void){ 1282 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1283 switch (hci_stack->substate){ 1284 case HCI_INIT_SEND_RESET: 1285 hci_state_reset(); 1286 1287 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1288 // prepare reset if command complete not received in 100ms 1289 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1290 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1291 btstack_run_loop_add_timer(&hci_stack->timeout); 1292 #endif 1293 // send command 1294 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1295 hci_send_cmd(&hci_reset); 1296 break; 1297 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1298 hci_send_cmd(&hci_read_local_version_information); 1299 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1300 break; 1301 case HCI_INIT_SEND_READ_LOCAL_NAME: 1302 hci_send_cmd(&hci_read_local_name); 1303 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1304 break; 1305 1306 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1307 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1308 hci_state_reset(); 1309 // prepare reset if command complete not received in 100ms 1310 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1311 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1312 btstack_run_loop_add_timer(&hci_stack->timeout); 1313 // send command 1314 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1315 hci_send_cmd(&hci_reset); 1316 break; 1317 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1318 hci_state_reset(); 1319 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1320 hci_send_cmd(&hci_reset); 1321 break; 1322 case HCI_INIT_SEND_BAUD_CHANGE: { 1323 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1324 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1325 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1326 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1327 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1328 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1329 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1330 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1331 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1332 btstack_run_loop_add_timer(&hci_stack->timeout); 1333 } 1334 break; 1335 } 1336 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1337 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1338 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1339 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1340 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1341 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1342 break; 1343 } 1344 case HCI_INIT_CUSTOM_INIT: 1345 // Custom initialization 1346 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1347 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1348 bool send_cmd = false; 1349 switch (hci_stack->chipset_result){ 1350 case BTSTACK_CHIPSET_VALID_COMMAND: 1351 send_cmd = true; 1352 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1353 break; 1354 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1355 send_cmd = true; 1356 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1357 log_info("CSR Warm Boot"); 1358 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1359 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1360 btstack_run_loop_add_timer(&hci_stack->timeout); 1361 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1362 && hci_stack->config 1363 && hci_stack->chipset 1364 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1365 && hci_stack->hci_transport->set_baudrate 1366 && hci_transport_uart_get_main_baud_rate()){ 1367 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1368 } else { 1369 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1370 } 1371 break; 1372 default: 1373 break; 1374 } 1375 1376 if (send_cmd){ 1377 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1378 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1379 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1380 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1381 break; 1382 } 1383 log_info("Init script done"); 1384 1385 // Init script download on Broadcom chipsets causes: 1386 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1387 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1388 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1389 1390 // - baud rate to reset, restore UART baud rate if needed 1391 int need_baud_change = hci_stack->config 1392 && hci_stack->chipset 1393 && hci_stack->chipset->set_baudrate_command 1394 && hci_stack->hci_transport->set_baudrate 1395 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1396 if (need_baud_change) { 1397 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1398 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1399 hci_stack->hci_transport->set_baudrate(baud_rate); 1400 } 1401 1402 uint16_t bcm_delay_ms = 300; 1403 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1404 // -> Work around: wait here. 1405 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1406 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1407 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1408 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1409 btstack_run_loop_add_timer(&hci_stack->timeout); 1410 break; 1411 } 1412 } 1413 // otherwise continue 1414 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1415 hci_send_cmd(&hci_read_local_supported_commands); 1416 break; 1417 case HCI_INIT_SET_BD_ADDR: 1418 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1419 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1420 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1421 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1422 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1423 break; 1424 #endif 1425 1426 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1427 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1428 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1429 hci_send_cmd(&hci_read_local_supported_commands); 1430 break; 1431 case HCI_INIT_READ_BD_ADDR: 1432 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1433 hci_send_cmd(&hci_read_bd_addr); 1434 break; 1435 case HCI_INIT_READ_BUFFER_SIZE: 1436 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1437 hci_send_cmd(&hci_read_buffer_size); 1438 break; 1439 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1440 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1441 hci_send_cmd(&hci_read_local_supported_features); 1442 break; 1443 1444 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1445 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1446 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1447 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1448 break; 1449 case HCI_INIT_HOST_BUFFER_SIZE: 1450 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1451 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1452 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1453 break; 1454 #endif 1455 1456 case HCI_INIT_SET_EVENT_MASK: 1457 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1458 if (hci_le_supported()){ 1459 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1460 } else { 1461 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1462 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1463 } 1464 break; 1465 1466 #ifdef ENABLE_CLASSIC 1467 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1468 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1469 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1470 break; 1471 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1472 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1473 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1474 break; 1475 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1476 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1477 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1478 break; 1479 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1480 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1481 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1482 break; 1483 case HCI_INIT_WRITE_LOCAL_NAME: { 1484 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1485 hci_reserve_packet_buffer(); 1486 uint8_t * packet = hci_stack->hci_packet_buffer; 1487 // construct HCI Command and send 1488 uint16_t opcode = hci_write_local_name.opcode; 1489 hci_stack->last_cmd_opcode = opcode; 1490 packet[0] = opcode & 0xff; 1491 packet[1] = opcode >> 8; 1492 packet[2] = DEVICE_NAME_LEN; 1493 memset(&packet[3], 0, DEVICE_NAME_LEN); 1494 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1495 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1496 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1497 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1498 // expand '00:00:00:00:00:00' in name with bd_addr 1499 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1500 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1501 break; 1502 } 1503 case HCI_INIT_WRITE_EIR_DATA: { 1504 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1505 hci_reserve_packet_buffer(); 1506 uint8_t * packet = hci_stack->hci_packet_buffer; 1507 // construct HCI Command in-place and send 1508 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1509 hci_stack->last_cmd_opcode = opcode; 1510 uint16_t offset = 0; 1511 packet[offset++] = opcode & 0xff; 1512 packet[offset++] = opcode >> 8; 1513 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1514 packet[offset++] = 0; // FEC not required 1515 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1516 if (hci_stack->eir_data){ 1517 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1518 ad_context_t context; 1519 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1520 uint8_t data_type = ad_iterator_get_data_type(&context); 1521 uint8_t size = ad_iterator_get_data_len(&context); 1522 const uint8_t *data = ad_iterator_get_data(&context); 1523 // copy item 1524 packet[offset++] = size + 1; 1525 packet[offset++] = data_type; 1526 memcpy(&packet[offset], data, size); 1527 // update name item 1528 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1529 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1530 } 1531 offset += size; 1532 } 1533 } else { 1534 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1535 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1536 packet[offset++] = bytes_to_copy + 1; 1537 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1538 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1539 // expand '00:00:00:00:00:00' in name with bd_addr 1540 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1541 } 1542 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1543 break; 1544 } 1545 case HCI_INIT_WRITE_INQUIRY_MODE: 1546 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1547 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1548 break; 1549 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1550 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1551 hci_stack->secure_connections_active = true; 1552 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1553 break; 1554 case HCI_INIT_WRITE_SCAN_ENABLE: 1555 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1556 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1557 break; 1558 // only sent if ENABLE_SCO_OVER_HCI is defined 1559 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1560 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1561 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1562 break; 1563 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1564 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1565 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1566 break; 1567 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1568 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1569 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1570 #ifdef ENABLE_SCO_OVER_HCI 1571 log_info("BCM: Route SCO data via HCI transport"); 1572 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1573 #endif 1574 #ifdef ENABLE_SCO_OVER_PCM 1575 log_info("BCM: Route SCO data via PCM interface"); 1576 #ifdef ENABLE_BCM_PCM_WBS 1577 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1578 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1579 #else 1580 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1581 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1582 #endif 1583 #endif 1584 break; 1585 #ifdef ENABLE_SCO_OVER_PCM 1586 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1587 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1588 log_info("BCM: Config PCM interface for I2S"); 1589 #ifdef ENABLE_BCM_PCM_WBS 1590 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1591 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1592 #else 1593 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1594 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1595 #endif 1596 break; 1597 #endif 1598 #endif 1599 1600 #ifdef ENABLE_BLE 1601 // LE INIT 1602 case HCI_INIT_LE_READ_BUFFER_SIZE: 1603 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1604 hci_send_cmd(&hci_le_read_buffer_size); 1605 break; 1606 case HCI_INIT_LE_SET_EVENT_MASK: 1607 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1608 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1609 break; 1610 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1611 // LE Supported Host = 1, Simultaneous Host = 0 1612 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1613 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1614 break; 1615 #endif 1616 1617 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1618 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1619 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1620 hci_send_cmd(&hci_le_read_maximum_data_length); 1621 break; 1622 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1623 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1624 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1625 break; 1626 #endif 1627 1628 #ifdef ENABLE_LE_CENTRAL 1629 case HCI_INIT_READ_WHITE_LIST_SIZE: 1630 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1631 hci_send_cmd(&hci_le_read_white_list_size); 1632 break; 1633 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1634 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1635 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); 1636 break; 1637 #endif 1638 default: 1639 return; 1640 } 1641 } 1642 1643 static void hci_init_done(void){ 1644 // done. tell the app 1645 log_info("hci_init_done -> HCI_STATE_WORKING"); 1646 hci_stack->state = HCI_STATE_WORKING; 1647 hci_emit_state(); 1648 hci_run(); 1649 } 1650 1651 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1652 bool command_completed = false; 1653 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1654 uint16_t opcode = little_endian_read_16(packet,3); 1655 if (opcode == hci_stack->last_cmd_opcode){ 1656 command_completed = true; 1657 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1658 } else { 1659 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1660 } 1661 } 1662 1663 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1664 uint8_t status = packet[2]; 1665 uint16_t opcode = little_endian_read_16(packet,4); 1666 if (opcode == hci_stack->last_cmd_opcode){ 1667 if (status){ 1668 command_completed = true; 1669 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1670 } else { 1671 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1672 } 1673 } else { 1674 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1675 } 1676 } 1677 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1678 // Vendor == CSR 1679 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1680 // TODO: track actual command 1681 command_completed = true; 1682 } 1683 1684 // Vendor == Toshiba 1685 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1686 // TODO: track actual command 1687 command_completed = true; 1688 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1689 hci_stack->num_cmd_packets = 1; 1690 } 1691 #endif 1692 1693 return command_completed; 1694 } 1695 1696 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1697 1698 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1699 1700 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1701 1702 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1703 1704 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1705 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1706 // 1707 // HCI Reset 1708 // Timeout 100 ms 1709 // HCI Reset 1710 // Command Complete Reset 1711 // HCI Read Local Version Information 1712 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1713 // hang... 1714 // 1715 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1716 if (!command_completed 1717 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1718 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1719 1720 uint16_t opcode = little_endian_read_16(packet,3); 1721 if (opcode == hci_reset.opcode){ 1722 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1723 return; 1724 } 1725 } 1726 1727 // CSR & H5 1728 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1729 if (!command_completed 1730 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1731 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1732 1733 uint16_t opcode = little_endian_read_16(packet,3); 1734 if (opcode == hci_reset.opcode){ 1735 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1736 return; 1737 } 1738 } 1739 1740 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1741 // fix: Correct substate and behave as command below 1742 if (command_completed){ 1743 switch (hci_stack->substate){ 1744 case HCI_INIT_SEND_RESET: 1745 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1746 break; 1747 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1748 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1749 break; 1750 default: 1751 break; 1752 } 1753 } 1754 1755 #endif 1756 1757 if (!command_completed) return; 1758 1759 bool need_baud_change = false; 1760 bool need_addr_change = false; 1761 1762 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1763 need_baud_change = hci_stack->config 1764 && hci_stack->chipset 1765 && hci_stack->chipset->set_baudrate_command 1766 && hci_stack->hci_transport->set_baudrate 1767 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1768 1769 need_addr_change = hci_stack->custom_bd_addr_set 1770 && hci_stack->chipset 1771 && hci_stack->chipset->set_bd_addr_command; 1772 #endif 1773 1774 switch(hci_stack->substate){ 1775 1776 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1777 case HCI_INIT_SEND_RESET: 1778 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1779 // fix: just correct substate and behave as command below 1780 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1781 btstack_run_loop_remove_timer(&hci_stack->timeout); 1782 break; 1783 case HCI_INIT_W4_SEND_RESET: 1784 btstack_run_loop_remove_timer(&hci_stack->timeout); 1785 break; 1786 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1787 log_info("Received local name, need baud change %d", (int) need_baud_change); 1788 if (need_baud_change){ 1789 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1790 return; 1791 } 1792 // skip baud change 1793 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1794 return; 1795 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1796 // for STLC2500D, baud rate change already happened. 1797 // for others, baud rate gets changed now 1798 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1799 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1800 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1801 hci_stack->hci_transport->set_baudrate(baud_rate); 1802 } 1803 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1804 return; 1805 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1806 btstack_run_loop_remove_timer(&hci_stack->timeout); 1807 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1808 return; 1809 case HCI_INIT_W4_CUSTOM_INIT: 1810 // repeat custom init 1811 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1812 return; 1813 #else 1814 case HCI_INIT_W4_SEND_RESET: 1815 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1816 return ; 1817 #endif 1818 1819 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1820 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1821 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1822 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1823 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1824 return; 1825 } 1826 if (need_addr_change){ 1827 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1828 return; 1829 } 1830 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1831 return; 1832 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1833 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1834 if (need_baud_change){ 1835 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1836 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1837 hci_stack->hci_transport->set_baudrate(baud_rate); 1838 } 1839 if (need_addr_change){ 1840 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1841 return; 1842 } 1843 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1844 return; 1845 case HCI_INIT_W4_SET_BD_ADDR: 1846 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1847 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1848 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1849 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1850 return; 1851 } 1852 // skipping st warm boot 1853 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1854 return; 1855 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1856 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1857 return; 1858 #endif 1859 case HCI_INIT_W4_READ_BD_ADDR: 1860 // only read buffer size if supported 1861 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1862 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1863 return; 1864 } 1865 // skipping read buffer size 1866 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1867 return; 1868 case HCI_INIT_W4_SET_EVENT_MASK: 1869 // skip Classic init commands for LE only chipsets 1870 if (!hci_classic_supported()){ 1871 #ifdef ENABLE_BLE 1872 if (hci_le_supported()){ 1873 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1874 return; 1875 } 1876 #endif 1877 log_error("Neither BR/EDR nor LE supported"); 1878 hci_init_done(); 1879 return; 1880 } 1881 if (!gap_ssp_supported()){ 1882 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1883 return; 1884 } 1885 break; 1886 #ifdef ENABLE_BLE 1887 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1888 // skip write le host if not supported (e.g. on LE only EM9301) 1889 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1890 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1891 return; 1892 1893 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1894 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1895 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1896 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1897 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1898 return; 1899 } 1900 // explicit fall through to reduce repetitions 1901 1902 #ifdef ENABLE_LE_CENTRAL 1903 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1904 #else 1905 hci_init_done(); 1906 #endif 1907 return; 1908 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1909 1910 #endif /* ENABLE_BLE */ 1911 1912 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1913 // skip write secure connections host support if not supported or disabled 1914 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1915 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1916 return; 1917 } 1918 break; 1919 1920 #ifdef ENABLE_SCO_OVER_HCI 1921 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1922 // skip write synchronous flow control if not supported 1923 if (hci_stack->local_supported_commands[0] & 0x04) break; 1924 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1925 1926 /* fall through */ 1927 1928 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1929 // skip write default erroneous data reporting if not supported 1930 if (hci_stack->local_supported_commands[0] & 0x08) break; 1931 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1932 1933 /* fall through */ 1934 1935 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1936 // skip bcm set sco pcm config on non-Broadcom chipsets 1937 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1938 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1939 1940 /* fall through */ 1941 1942 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1943 if (!hci_le_supported()){ 1944 // SKIP LE init for Classic only configuration 1945 hci_init_done(); 1946 return; 1947 } 1948 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1949 break; 1950 1951 #else /* !ENABLE_SCO_OVER_HCI */ 1952 1953 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1954 #ifdef ENABLE_SCO_OVER_PCM 1955 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1956 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1957 return; 1958 } 1959 #endif 1960 /* fall through */ 1961 1962 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1963 #ifdef ENABLE_BLE 1964 if (hci_le_supported()){ 1965 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1966 return; 1967 } 1968 #endif 1969 // SKIP LE init for Classic only configuration 1970 hci_init_done(); 1971 return; 1972 #endif /* ENABLE_SCO_OVER_HCI */ 1973 1974 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1975 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1976 // Response to command before init done state -> init done 1977 case (HCI_INIT_DONE-1): 1978 hci_init_done(); 1979 return; 1980 #endif 1981 1982 default: 1983 break; 1984 } 1985 hci_initializing_next_state(); 1986 } 1987 1988 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1989 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1990 bd_addr_t bd_address; 1991 (void)memcpy(&bd_address, conn->address, 6); 1992 1993 #ifdef ENABLE_CLASSIC 1994 // cache needed data 1995 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1996 #endif 1997 1998 // connection failed, remove entry 1999 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2000 btstack_memory_hci_connection_free( conn ); 2001 2002 #ifdef ENABLE_CLASSIC 2003 // notify client if dedicated bonding 2004 if (notify_dedicated_bonding_failed){ 2005 log_info("hci notify_dedicated_bonding_failed"); 2006 hci_emit_dedicated_bonding_result(bd_address, status); 2007 } 2008 2009 // if authentication error, also delete link key 2010 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2011 gap_drop_link_key_for_bd_addr(bd_address); 2012 } 2013 #else 2014 UNUSED(status); 2015 #endif 2016 } 2017 2018 #ifdef ENABLE_CLASSIC 2019 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2020 // SSP Controller 2021 if (features[6] & (1 << 3)){ 2022 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2023 } 2024 // eSCO 2025 if (features[3] & (1<<7)){ 2026 conn->remote_supported_features[0] |= 1; 2027 } 2028 // Extended features 2029 if (features[7] & (1<<7)){ 2030 conn->remote_supported_features[0] |= 2; 2031 } 2032 } 2033 2034 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2035 // SSP Host 2036 if (features[0] & (1 << 0)){ 2037 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2038 } 2039 // SC Host 2040 if (features[0] & (1 << 3)){ 2041 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2042 } 2043 } 2044 2045 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2046 // SC Controller 2047 if (features[1] & (1 << 0)){ 2048 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2049 } 2050 } 2051 2052 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2053 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2054 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2055 if (conn->bonding_flags & BONDING_DEDICATED){ 2056 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2057 } 2058 } 2059 #endif 2060 2061 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2062 // handle BT initialization 2063 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2064 hci_initializing_event_handler(packet, size); 2065 } 2066 2067 // help with BT sleep 2068 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2069 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2070 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2071 hci_initializing_next_state(); 2072 } 2073 } 2074 2075 #ifdef ENABLE_CLASSIC 2076 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2077 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2078 conn->encryption_key_size = encryption_key_size; 2079 2080 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 2081 conn->requested_security_level = LEVEL_0; 2082 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2083 return; 2084 } 2085 2086 // Request Authentication if not already done 2087 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2088 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2089 } 2090 #endif 2091 2092 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2093 UNUSED(size); 2094 2095 uint16_t manufacturer; 2096 #ifdef ENABLE_CLASSIC 2097 hci_con_handle_t handle; 2098 hci_connection_t * conn; 2099 uint8_t status; 2100 #endif 2101 // get num cmd packets - limit to 1 to reduce complexity 2102 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2103 2104 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2105 switch (opcode){ 2106 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2107 if (packet[5]) break; 2108 // terminate, name 248 chars 2109 packet[6+248] = 0; 2110 log_info("local name: %s", &packet[6]); 2111 break; 2112 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2113 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2114 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2115 uint16_t acl_len = little_endian_read_16(packet, 6); 2116 uint16_t sco_len = packet[8]; 2117 2118 // determine usable ACL/SCO payload size 2119 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2120 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2121 2122 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2123 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2124 2125 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2126 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2127 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2128 } 2129 break; 2130 case HCI_OPCODE_HCI_READ_RSSI: 2131 if (packet[5] == ERROR_CODE_SUCCESS){ 2132 uint8_t event[5]; 2133 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2134 event[1] = 3; 2135 (void)memcpy(&event[2], &packet[6], 3); 2136 hci_emit_event(event, sizeof(event), 1); 2137 } 2138 break; 2139 #ifdef ENABLE_BLE 2140 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2141 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2142 hci_stack->le_acl_packets_total_num = packet[8]; 2143 // determine usable ACL payload size 2144 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2145 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2146 } 2147 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2148 break; 2149 #endif 2150 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2151 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2152 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2153 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2154 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); 2155 break; 2156 #endif 2157 #ifdef ENABLE_LE_CENTRAL 2158 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2159 hci_stack->le_whitelist_capacity = packet[6]; 2160 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2161 break; 2162 #endif 2163 case HCI_OPCODE_HCI_READ_BD_ADDR: 2164 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2165 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)); 2166 #ifdef ENABLE_CLASSIC 2167 if (hci_stack->link_key_db){ 2168 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2169 } 2170 #endif 2171 break; 2172 #ifdef ENABLE_CLASSIC 2173 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2174 hci_emit_discoverable_enabled(hci_stack->discoverable); 2175 break; 2176 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2177 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2178 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2179 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2180 hci_emit_event(event, sizeof(event), 1); 2181 } 2182 break; 2183 #endif 2184 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2185 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2186 2187 #ifdef ENABLE_CLASSIC 2188 // determine usable ACL packet types based on host buffer size and supported features 2189 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2190 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2191 #endif 2192 // Classic/LE 2193 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2194 break; 2195 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2196 manufacturer = little_endian_read_16(packet, 10); 2197 // map Cypress to Broadcom 2198 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2199 log_info("Treat Cypress as Broadcom"); 2200 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2201 little_endian_store_16(packet, 10, manufacturer); 2202 } 2203 hci_stack->manufacturer = manufacturer; 2204 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2205 break; 2206 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2207 hci_stack->local_supported_commands[0] = 2208 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2209 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2210 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2211 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2212 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2213 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2214 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2215 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2216 hci_stack->local_supported_commands[1] = 2217 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2218 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2219 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2220 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2221 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2222 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2223 break; 2224 #ifdef ENABLE_CLASSIC 2225 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2226 if (packet[5]) return; 2227 hci_stack->synchronous_flow_control_enabled = 1; 2228 break; 2229 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2230 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2231 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2232 conn = hci_connection_for_handle(handle); 2233 if (conn != NULL) { 2234 uint8_t key_size = 0; 2235 if (status == 0){ 2236 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2237 log_info("Handle %04x key Size: %u", handle, key_size); 2238 } else { 2239 key_size = 1; 2240 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2241 } 2242 hci_handle_read_encryption_key_size_complete(conn, key_size); 2243 } 2244 break; 2245 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2246 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2247 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2248 uint8_t event[67]; 2249 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2250 event[1] = 65; 2251 (void)memset(&event[2], 0, 65); 2252 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2253 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2254 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2255 event[2] = 3; 2256 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2257 } else { 2258 event[2] = 1; 2259 } 2260 } 2261 hci_emit_event(event, sizeof(event), 0); 2262 break; 2263 } 2264 #endif 2265 #endif 2266 default: 2267 break; 2268 } 2269 } 2270 2271 #ifdef ENABLE_BLE 2272 static void event_handle_le_connection_complete(const uint8_t * packet){ 2273 bd_addr_t addr; 2274 bd_addr_type_t addr_type; 2275 hci_connection_t * conn; 2276 2277 // Connection management 2278 reverse_bd_addr(&packet[8], addr); 2279 addr_type = (bd_addr_type_t)packet[7]; 2280 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2281 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2282 2283 #ifdef ENABLE_LE_CENTRAL 2284 // handle error: error is reported only to the initiator -> outgoing connection 2285 if (packet[3]){ 2286 2287 // handle cancelled outgoing connection 2288 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2289 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2290 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2291 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2292 // reset state 2293 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2294 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2295 // get outgoing connection conn struct for direct connect 2296 conn = gap_get_outgoing_connection(); 2297 } 2298 2299 // outgoing le connection establishment is done 2300 if (conn){ 2301 // remove entry 2302 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2303 btstack_memory_hci_connection_free( conn ); 2304 } 2305 return; 2306 } 2307 #endif 2308 2309 // on success, both hosts receive connection complete event 2310 if (packet[6] == HCI_ROLE_MASTER){ 2311 #ifdef ENABLE_LE_CENTRAL 2312 // if we're master on an le connection, it was an outgoing connection and we're done with it 2313 // note: no hci_connection_t object exists yet for connect with whitelist 2314 if (hci_is_le_connection_type(addr_type)){ 2315 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2316 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2317 } 2318 #endif 2319 } else { 2320 #ifdef ENABLE_LE_PERIPHERAL 2321 // if we're slave, it was an incoming connection, advertisements have stopped 2322 hci_stack->le_advertisements_active = false; 2323 #endif 2324 } 2325 2326 // LE connections are auto-accepted, so just create a connection if there isn't one already 2327 if (!conn){ 2328 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2329 } 2330 2331 // no memory, sorry. 2332 if (!conn){ 2333 return; 2334 } 2335 2336 conn->state = OPEN; 2337 conn->role = packet[6]; 2338 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2339 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2340 2341 #ifdef ENABLE_LE_PERIPHERAL 2342 if (packet[6] == HCI_ROLE_SLAVE){ 2343 hci_update_advertisements_enabled_for_current_roles(); 2344 } 2345 #endif 2346 2347 // init unenhanced att bearer mtu 2348 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2349 conn->att_connection.mtu_exchanged = false; 2350 2351 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2352 2353 // restart timer 2354 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2355 // btstack_run_loop_add_timer(&conn->timeout); 2356 2357 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2358 2359 hci_emit_nr_connections_changed(); 2360 } 2361 #endif 2362 2363 #ifdef ENABLE_CLASSIC 2364 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){ 2365 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2366 // LEVEL_4 is tested by l2cap 2367 // LEVEL 3 requires MITM protection -> check io capabilities 2368 if (level >= LEVEL_3){ 2369 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2370 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2371 if ((io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) && (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY)) return false; 2372 } 2373 // LEVEL 2 requires SSP, which is a given 2374 return true; 2375 } 2376 2377 static bool hci_ssp_validate_possible_security_level(bd_addr_t addr){ 2378 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2379 if (!conn) return false; 2380 // abort pairing, if requested security level cannot be met 2381 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2382 // inlined hci_add_connection_flags_for_flipped_bd_addr 2383 hci_connection_timestamp(conn); 2384 return true; 2385 } else { 2386 log_info("Level %u cannot be reached", conn->requested_security_level); 2387 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2388 return false; 2389 }; 2390 } 2391 2392 #endif 2393 2394 static void event_handler(uint8_t *packet, uint16_t size){ 2395 2396 uint16_t event_length = packet[1]; 2397 2398 // assert packet is complete 2399 if (size != (event_length + 2u)){ 2400 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2401 return; 2402 } 2403 2404 bd_addr_type_t addr_type; 2405 hci_con_handle_t handle; 2406 hci_connection_t * conn; 2407 int i; 2408 int create_connection_cmd; 2409 2410 #ifdef ENABLE_CLASSIC 2411 hci_link_type_t link_type; 2412 bd_addr_t addr; 2413 #endif 2414 2415 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2416 2417 switch (hci_event_packet_get_type(packet)) { 2418 2419 case HCI_EVENT_COMMAND_COMPLETE: 2420 handle_command_complete_event(packet, size); 2421 break; 2422 2423 case HCI_EVENT_COMMAND_STATUS: 2424 // get num cmd packets - limit to 1 to reduce complexity 2425 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2426 2427 // check command status to detected failed outgoing connections 2428 create_connection_cmd = 0; 2429 #ifdef ENABLE_CLASSIC 2430 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2431 create_connection_cmd = 1; 2432 } 2433 #endif 2434 #ifdef ENABLE_LE_CENTRAL 2435 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2436 create_connection_cmd = 1; 2437 } 2438 #endif 2439 if (create_connection_cmd) { 2440 uint8_t status = hci_event_command_status_get_status(packet); 2441 addr_type = hci_stack->outgoing_addr_type; 2442 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2443 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); 2444 2445 // reset outgoing address info 2446 memset(hci_stack->outgoing_addr, 0, 6); 2447 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2448 2449 // on error 2450 if (status != ERROR_CODE_SUCCESS){ 2451 #ifdef ENABLE_LE_CENTRAL 2452 if (hci_is_le_connection_type(addr_type)){ 2453 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2454 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2455 } 2456 #endif 2457 // error => outgoing connection failed 2458 if (conn != NULL){ 2459 hci_handle_connection_failed(conn, status); 2460 } 2461 } 2462 } 2463 2464 #ifdef ENABLE_CLASSIC 2465 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2466 uint8_t status = hci_event_command_status_get_status(packet); 2467 log_info("command status (inquiry), status %x", status); 2468 if (status == ERROR_CODE_SUCCESS) { 2469 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2470 } else { 2471 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2472 } 2473 } 2474 #endif 2475 break; 2476 2477 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2478 if (size < 3) return; 2479 uint16_t num_handles = packet[2]; 2480 if (size != (3u + num_handles * 4u)) return; 2481 uint16_t offset = 3; 2482 for (i=0; i<num_handles;i++){ 2483 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2484 offset += 2u; 2485 uint16_t num_packets = little_endian_read_16(packet, offset); 2486 offset += 2u; 2487 2488 conn = hci_connection_for_handle(handle); 2489 if (!conn){ 2490 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2491 continue; 2492 } 2493 2494 if (conn->num_packets_sent >= num_packets){ 2495 conn->num_packets_sent -= num_packets; 2496 } else { 2497 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2498 conn->num_packets_sent = 0; 2499 } 2500 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2501 2502 #ifdef ENABLE_CLASSIC 2503 // For SCO, we do the can_send_now_check here 2504 hci_notify_if_sco_can_send_now(); 2505 #endif 2506 } 2507 break; 2508 } 2509 2510 #ifdef ENABLE_CLASSIC 2511 case HCI_EVENT_INQUIRY_COMPLETE: 2512 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2513 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2514 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2515 hci_emit_event(event, sizeof(event), 1); 2516 } 2517 break; 2518 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2519 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2520 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2521 } 2522 break; 2523 case HCI_EVENT_CONNECTION_REQUEST: 2524 reverse_bd_addr(&packet[2], addr); 2525 link_type = (hci_link_type_t) packet[11]; 2526 if (hci_stack->gap_classic_accept_callback != NULL){ 2527 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2528 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2529 bd_addr_copy(hci_stack->decline_addr, addr); 2530 break; 2531 } 2532 } 2533 2534 // TODO: eval COD 8-10 2535 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2536 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2537 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2538 if (!conn) { 2539 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2540 } 2541 if (!conn) { 2542 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2543 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2544 bd_addr_copy(hci_stack->decline_addr, addr); 2545 break; 2546 } 2547 conn->role = HCI_ROLE_SLAVE; 2548 conn->state = RECEIVED_CONNECTION_REQUEST; 2549 // store info about eSCO 2550 if (link_type == HCI_LINK_TYPE_ESCO){ 2551 conn->remote_supported_features[0] |= 1; 2552 } 2553 hci_run(); 2554 break; 2555 2556 case HCI_EVENT_CONNECTION_COMPLETE: 2557 // Connection management 2558 reverse_bd_addr(&packet[5], addr); 2559 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2560 addr_type = BD_ADDR_TYPE_ACL; 2561 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2562 if (conn) { 2563 if (!packet[2]){ 2564 conn->state = OPEN; 2565 conn->con_handle = little_endian_read_16(packet, 3); 2566 2567 // queue get remote feature 2568 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2569 2570 // queue set supervision timeout if we're master 2571 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2572 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2573 } 2574 2575 // restart timer 2576 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2577 btstack_run_loop_add_timer(&conn->timeout); 2578 2579 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2580 2581 hci_emit_nr_connections_changed(); 2582 } else { 2583 // connection failed 2584 hci_handle_connection_failed(conn, packet[2]); 2585 } 2586 } 2587 break; 2588 2589 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2590 reverse_bd_addr(&packet[5], addr); 2591 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2592 if (packet[2]){ 2593 // connection failed 2594 break; 2595 } 2596 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2597 if (!conn) { 2598 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2599 } 2600 if (!conn) { 2601 break; 2602 } 2603 conn->state = OPEN; 2604 conn->con_handle = little_endian_read_16(packet, 3); 2605 2606 #ifdef ENABLE_SCO_OVER_HCI 2607 // update SCO 2608 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2609 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2610 } 2611 // trigger can send now 2612 if (hci_have_usb_transport()){ 2613 hci_stack->sco_can_send_now = 1; 2614 } 2615 #endif 2616 #ifdef HAVE_SCO_TRANSPORT 2617 // configure sco transport 2618 if (hci_stack->sco_transport != NULL){ 2619 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2620 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2621 } 2622 #endif 2623 break; 2624 2625 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2626 handle = little_endian_read_16(packet, 3); 2627 conn = hci_connection_for_handle(handle); 2628 if (!conn) break; 2629 if (!packet[2]){ 2630 const uint8_t * features = &packet[5]; 2631 hci_handle_remote_features_page_0(conn, features); 2632 2633 // read extended features if possible 2634 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2635 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2636 break; 2637 } 2638 } 2639 hci_handle_remote_features_received(conn); 2640 break; 2641 2642 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2643 handle = little_endian_read_16(packet, 3); 2644 conn = hci_connection_for_handle(handle); 2645 if (!conn) break; 2646 // status = ok, page = 1 2647 if (!packet[2]) { 2648 uint8_t page_number = packet[5]; 2649 uint8_t maximum_page_number = packet[6]; 2650 const uint8_t * features = &packet[7]; 2651 bool done = false; 2652 switch (page_number){ 2653 case 1: 2654 hci_handle_remote_features_page_1(conn, features); 2655 if (maximum_page_number >= 2){ 2656 // get Secure Connections (Controller) from Page 2 if available 2657 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2658 } else { 2659 // otherwise, assume SC (Controller) == SC (Host) 2660 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2661 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2662 } 2663 done = true; 2664 } 2665 break; 2666 case 2: 2667 hci_handle_remote_features_page_2(conn, features); 2668 done = true; 2669 break; 2670 default: 2671 break; 2672 } 2673 if (!done) break; 2674 } 2675 hci_handle_remote_features_received(conn); 2676 break; 2677 2678 case HCI_EVENT_LINK_KEY_REQUEST: 2679 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2680 // request handled by hci_run() 2681 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2682 break; 2683 2684 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2685 hci_event_link_key_request_get_bd_addr(packet, addr); 2686 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2687 if (!conn) break; 2688 2689 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2690 2691 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2692 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2693 // Change Connection Encryption keeps link key type 2694 if (link_key_type != CHANGED_COMBINATION_KEY){ 2695 conn->link_key_type = link_key_type; 2696 } 2697 // cache link key. link keys stored in little-endian format for legacy reasons 2698 memcpy(&conn->link_key, &packet[8], 16); 2699 2700 // only store link key: 2701 // - if bondable enabled 2702 if (hci_stack->bondable == false) break; 2703 // - if security level sufficient 2704 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2705 // - for SSP, also check if remote side requested bonding as well 2706 if (conn->link_key_type != COMBINATION_KEY){ 2707 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2708 if (!remote_bonding){ 2709 break; 2710 } 2711 } 2712 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2713 break; 2714 } 2715 2716 case HCI_EVENT_PIN_CODE_REQUEST: 2717 hci_event_pin_code_request_get_bd_addr(packet, addr); 2718 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2719 if (!conn) break; 2720 2721 hci_pairing_started(conn, false); 2722 // non-bondable mode: pin code negative reply will be sent (event is not forwarded to app) 2723 if (!hci_stack->bondable){ 2724 conn->authentication_flags |= DENY_PIN_CODE_REQUEST; 2725 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2726 hci_run(); 2727 return; 2728 } 2729 break; 2730 2731 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2732 hci_event_io_capability_response_get_bd_addr(packet, addr); 2733 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2734 if (!conn) break; 2735 2736 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_RESPONSE); 2737 hci_pairing_started(conn, true); 2738 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2739 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2740 break; 2741 2742 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2743 hci_event_io_capability_response_get_bd_addr(packet, addr); 2744 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2745 if (!conn) break; 2746 2747 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2748 hci_pairing_started(conn, true); 2749 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2750 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2751 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2752 } else { 2753 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2754 } 2755 #endif 2756 break; 2757 2758 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2759 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2760 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2761 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_REMOTE_OOB_DATA_REPLY); 2762 break; 2763 #endif 2764 2765 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2766 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2767 if (hci_ssp_validate_possible_security_level(addr) == false) break; 2768 if (!hci_stack->ssp_auto_accept) break; 2769 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2770 break; 2771 2772 case HCI_EVENT_USER_PASSKEY_REQUEST: 2773 hci_event_user_passkey_request_get_bd_addr(packet, addr); 2774 if (hci_ssp_validate_possible_security_level(addr) == false) break; 2775 if (!hci_stack->ssp_auto_accept) break; 2776 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2777 break; 2778 2779 case HCI_EVENT_MODE_CHANGE: 2780 handle = hci_event_mode_change_get_handle(packet); 2781 conn = hci_connection_for_handle(handle); 2782 if (!conn) break; 2783 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2784 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2785 break; 2786 #endif 2787 2788 case HCI_EVENT_ENCRYPTION_CHANGE: 2789 handle = hci_event_encryption_change_get_connection_handle(packet); 2790 conn = hci_connection_for_handle(handle); 2791 if (!conn) break; 2792 if (hci_event_encryption_change_get_status(packet) == 0u) { 2793 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2794 if (encryption_enabled){ 2795 if (hci_is_le_connection(conn)){ 2796 // For LE, we accept connection as encrypted 2797 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2798 } 2799 #ifdef ENABLE_CLASSIC 2800 else { 2801 2802 // dedicated bonding: send result and disconnect 2803 if (conn->bonding_flags & BONDING_DEDICATED){ 2804 conn->bonding_flags &= ~BONDING_DEDICATED; 2805 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2806 conn->bonding_status = packet[2]; 2807 break; 2808 } 2809 2810 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2811 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2812 bool connected_uses_aes_ccm = encryption_enabled == 2; 2813 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2814 log_info("SC during pairing, but only E0 now -> abort"); 2815 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2816 break; 2817 } 2818 2819 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2820 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2821 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2822 } else { 2823 // if not, pretend everything is perfect 2824 hci_handle_read_encryption_key_size_complete(conn, 16); 2825 } 2826 } 2827 #endif 2828 } else { 2829 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2830 } 2831 } 2832 2833 break; 2834 2835 #ifdef ENABLE_CLASSIC 2836 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2837 handle = hci_event_authentication_complete_get_connection_handle(packet); 2838 conn = hci_connection_for_handle(handle); 2839 if (!conn) break; 2840 2841 // clear authentication active flag 2842 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 2843 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 2844 2845 // authenticated only if auth status == 0 2846 if (hci_event_authentication_complete_get_status(packet) == 0){ 2847 // authenticated 2848 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2849 2850 // If not already encrypted, start encryption 2851 if ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0){ 2852 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2853 break; 2854 } 2855 } 2856 2857 // emit updated security level 2858 conn->requested_security_level = LEVEL_0; 2859 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2860 break; 2861 2862 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 2863 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 2864 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2865 if (!conn) break; 2866 2867 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 2868 break; 2869 #endif 2870 2871 // HCI_EVENT_DISCONNECTION_COMPLETE 2872 // has been split, to first notify stack before shutting connection down 2873 // see end of function, too. 2874 case HCI_EVENT_DISCONNECTION_COMPLETE: 2875 if (packet[2]) break; // status != 0 2876 handle = little_endian_read_16(packet, 3); 2877 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2878 if (hci_stack->acl_fragmentation_total_size > 0u) { 2879 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2880 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2881 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2882 hci_stack->acl_fragmentation_total_size = 0; 2883 hci_stack->acl_fragmentation_pos = 0; 2884 if (release_buffer){ 2885 hci_release_packet_buffer(); 2886 } 2887 } 2888 } 2889 2890 conn = hci_connection_for_handle(handle); 2891 if (!conn) break; 2892 #ifdef ENABLE_CLASSIC 2893 // pairing failed if it was ongoing 2894 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 2895 #endif 2896 // mark connection for shutdown 2897 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2898 2899 // emit dedicatd bonding event 2900 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2901 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2902 } 2903 2904 #ifdef ENABLE_BLE 2905 #ifdef ENABLE_LE_PERIPHERAL 2906 // re-enable advertisements for le connections if active 2907 if (hci_is_le_connection(conn)){ 2908 hci_update_advertisements_enabled_for_current_roles(); 2909 } 2910 #endif 2911 #endif 2912 break; 2913 2914 case HCI_EVENT_HARDWARE_ERROR: 2915 log_error("Hardware Error: 0x%02x", packet[2]); 2916 if (hci_stack->hardware_error_callback){ 2917 (*hci_stack->hardware_error_callback)(packet[2]); 2918 } else { 2919 // if no special requests, just reboot stack 2920 hci_power_control_off(); 2921 hci_power_control_on(); 2922 } 2923 break; 2924 2925 #ifdef ENABLE_CLASSIC 2926 case HCI_EVENT_ROLE_CHANGE: 2927 if (packet[2]) break; // status != 0 2928 reverse_bd_addr(&packet[3], addr); 2929 addr_type = BD_ADDR_TYPE_ACL; 2930 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2931 if (!conn) break; 2932 conn->role = packet[9]; 2933 break; 2934 #endif 2935 2936 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2937 // release packet buffer only for asynchronous transport and if there are not further fragements 2938 if (hci_transport_synchronous()) { 2939 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2940 return; // instead of break: to avoid re-entering hci_run() 2941 } 2942 hci_stack->acl_fragmentation_tx_active = 0; 2943 if (hci_stack->acl_fragmentation_total_size) break; 2944 hci_release_packet_buffer(); 2945 2946 // L2CAP receives this event via the hci_emit_event below 2947 2948 #ifdef ENABLE_CLASSIC 2949 // For SCO, we do the can_send_now_check here 2950 hci_notify_if_sco_can_send_now(); 2951 #endif 2952 break; 2953 2954 #ifdef ENABLE_CLASSIC 2955 case HCI_EVENT_SCO_CAN_SEND_NOW: 2956 // For SCO, we do the can_send_now_check here 2957 hci_stack->sco_can_send_now = 1; 2958 hci_notify_if_sco_can_send_now(); 2959 return; 2960 2961 // explode inquriy results for easier consumption 2962 case HCI_EVENT_INQUIRY_RESULT: 2963 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2964 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2965 gap_inquiry_explode(packet, size); 2966 break; 2967 #endif 2968 2969 #ifdef ENABLE_BLE 2970 case HCI_EVENT_LE_META: 2971 switch (packet[2]){ 2972 #ifdef ENABLE_LE_CENTRAL 2973 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2974 // log_info("advertising report received"); 2975 if (!hci_stack->le_scanning_enabled) break; 2976 le_handle_advertisement_report(packet, size); 2977 break; 2978 #endif 2979 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2980 event_handle_le_connection_complete(packet); 2981 break; 2982 2983 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2984 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2985 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2986 conn = hci_connection_for_handle(handle); 2987 if (!conn) break; 2988 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2989 break; 2990 2991 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2992 // connection 2993 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2994 conn = hci_connection_for_handle(handle); 2995 if (conn) { 2996 // read arguments 2997 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2998 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2999 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3000 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3001 3002 // validate against current connection parameter range 3003 le_connection_parameter_range_t existing_range; 3004 gap_get_connection_parameter_range(&existing_range); 3005 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3006 if (update_parameter){ 3007 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3008 conn->le_conn_interval_min = le_conn_interval_min; 3009 conn->le_conn_interval_max = le_conn_interval_max; 3010 conn->le_conn_latency = le_conn_latency; 3011 conn->le_supervision_timeout = le_supervision_timeout; 3012 } else { 3013 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3014 } 3015 } 3016 break; 3017 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3018 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3019 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3020 conn = hci_connection_for_handle(handle); 3021 if (conn) { 3022 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3023 } 3024 break; 3025 #endif 3026 default: 3027 break; 3028 } 3029 break; 3030 #endif 3031 case HCI_EVENT_VENDOR_SPECIFIC: 3032 // Vendor specific commands often create vendor specific event instead of num completed packets 3033 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3034 switch (hci_stack->manufacturer){ 3035 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3036 hci_stack->num_cmd_packets = 1; 3037 break; 3038 default: 3039 break; 3040 } 3041 break; 3042 default: 3043 break; 3044 } 3045 3046 handle_event_for_current_stack_state(packet, size); 3047 3048 // notify upper stack 3049 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3050 3051 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3052 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3053 handle = little_endian_read_16(packet, 3); 3054 hci_connection_t * aConn = hci_connection_for_handle(handle); 3055 // discard connection if app did not trigger a reconnect in the event handler 3056 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3057 hci_shutdown_connection(aConn); 3058 } 3059 } 3060 3061 // execute main loop 3062 hci_run(); 3063 } 3064 3065 #ifdef ENABLE_CLASSIC 3066 3067 #ifdef ENABLE_SCO_OVER_HCI 3068 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3069 static void sco_schedule_tx(hci_connection_t * conn); 3070 3071 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3072 log_debug("SCO TX Timeout"); 3073 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3074 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3075 if (!conn) return; 3076 3077 // trigger send 3078 conn->sco_tx_ready = 1; 3079 // extra packet if CVSD but SCO buffer is too short 3080 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3081 conn->sco_tx_ready++; 3082 } 3083 hci_notify_if_sco_can_send_now(); 3084 } 3085 3086 3087 #define SCO_TX_AFTER_RX_MS (6) 3088 3089 static void sco_schedule_tx(hci_connection_t * conn){ 3090 3091 uint32_t now = btstack_run_loop_get_time_ms(); 3092 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3093 int time_delta_ms = sco_tx_ms - now; 3094 3095 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3096 3097 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3098 btstack_run_loop_set_timer(timer, time_delta_ms); 3099 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3100 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3101 btstack_run_loop_add_timer(timer); 3102 } 3103 #endif 3104 3105 static void sco_handler(uint8_t * packet, uint16_t size){ 3106 // lookup connection struct 3107 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3108 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3109 if (!conn) return; 3110 3111 #ifdef ENABLE_SCO_OVER_HCI 3112 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3113 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3114 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3115 packet[2] = 0x3c; 3116 memmove(&packet[3], &packet[23], 63); 3117 size = 63; 3118 } 3119 } 3120 3121 if (hci_have_usb_transport()){ 3122 // Nothing to do 3123 } else { 3124 // 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); 3125 if (hci_stack->synchronous_flow_control_enabled == 0){ 3126 uint32_t now = btstack_run_loop_get_time_ms(); 3127 3128 if (!conn->sco_rx_valid){ 3129 // ignore first 10 packets 3130 conn->sco_rx_count++; 3131 // log_debug("sco rx count %u", conn->sco_rx_count); 3132 if (conn->sco_rx_count == 10) { 3133 // use first timestamp as is and pretent it just started 3134 conn->sco_rx_ms = now; 3135 conn->sco_rx_valid = 1; 3136 conn->sco_rx_count = 0; 3137 sco_schedule_tx(conn); 3138 } 3139 } else { 3140 // track expected arrival timme 3141 conn->sco_rx_count++; 3142 conn->sco_rx_ms += 7; 3143 int delta = (int32_t) (now - conn->sco_rx_ms); 3144 if (delta > 0){ 3145 conn->sco_rx_ms++; 3146 } 3147 // log_debug("sco rx %u", conn->sco_rx_ms); 3148 sco_schedule_tx(conn); 3149 } 3150 } 3151 } 3152 #endif 3153 3154 // deliver to app 3155 if (hci_stack->sco_packet_handler) { 3156 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3157 } 3158 3159 #ifdef HAVE_SCO_TRANSPORT 3160 // We can send one packet for each received packet 3161 conn->sco_tx_ready++; 3162 hci_notify_if_sco_can_send_now(); 3163 #endif 3164 3165 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3166 conn->num_packets_completed++; 3167 hci_stack->host_completed_packets = 1; 3168 hci_run(); 3169 #endif 3170 } 3171 #endif 3172 3173 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3174 hci_dump_packet(packet_type, 1, packet, size); 3175 switch (packet_type) { 3176 case HCI_EVENT_PACKET: 3177 event_handler(packet, size); 3178 break; 3179 case HCI_ACL_DATA_PACKET: 3180 acl_handler(packet, size); 3181 break; 3182 #ifdef ENABLE_CLASSIC 3183 case HCI_SCO_DATA_PACKET: 3184 sco_handler(packet, size); 3185 break; 3186 #endif 3187 default: 3188 break; 3189 } 3190 } 3191 3192 /** 3193 * @brief Add event packet handler. 3194 */ 3195 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3196 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3197 } 3198 3199 3200 /** Register HCI packet handlers */ 3201 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3202 hci_stack->acl_packet_handler = handler; 3203 } 3204 3205 #ifdef ENABLE_CLASSIC 3206 /** 3207 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3208 */ 3209 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3210 hci_stack->sco_packet_handler = handler; 3211 } 3212 #endif 3213 3214 static void hci_state_reset(void){ 3215 // no connections yet 3216 hci_stack->connections = NULL; 3217 3218 // keep discoverable/connectable as this has been requested by the client(s) 3219 // hci_stack->discoverable = 0; 3220 // hci_stack->connectable = 0; 3221 // hci_stack->bondable = 1; 3222 // hci_stack->own_addr_type = 0; 3223 3224 // buffer is free 3225 hci_stack->hci_packet_buffer_reserved = 0; 3226 3227 // no pending cmds 3228 hci_stack->decline_reason = 0; 3229 hci_stack->new_scan_enable_value = 0xff; 3230 3231 hci_stack->secure_connections_active = false; 3232 3233 #ifdef ENABLE_CLASSIC 3234 hci_stack->new_page_scan_interval = 0xffff; 3235 hci_stack->new_page_scan_window = 0xffff; 3236 hci_stack->new_page_scan_type = 0xff; 3237 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3238 #endif 3239 3240 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3241 hci_stack->classic_read_local_oob_data = true; 3242 #endif 3243 3244 // LE 3245 #ifdef ENABLE_BLE 3246 memset(hci_stack->le_random_address, 0, 6); 3247 hci_stack->le_random_address_set = 0; 3248 #endif 3249 #ifdef ENABLE_LE_CENTRAL 3250 hci_stack->le_scanning_active = false; 3251 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3252 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3253 hci_stack->le_whitelist_capacity = 0; 3254 #endif 3255 #ifdef ENABLE_LE_PERIPHERAL 3256 hci_stack->le_advertisements_active = false; 3257 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3258 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3259 } 3260 if (hci_stack->le_advertisements_data != NULL){ 3261 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3262 } 3263 #endif 3264 } 3265 3266 #ifdef ENABLE_CLASSIC 3267 /** 3268 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3269 */ 3270 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3271 // store and open remote device db 3272 hci_stack->link_key_db = link_key_db; 3273 if (hci_stack->link_key_db) { 3274 hci_stack->link_key_db->open(); 3275 } 3276 } 3277 #endif 3278 3279 void hci_init(const hci_transport_t *transport, const void *config){ 3280 3281 #ifdef HAVE_MALLOC 3282 if (!hci_stack) { 3283 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3284 } 3285 #else 3286 hci_stack = &hci_stack_static; 3287 #endif 3288 memset(hci_stack, 0, sizeof(hci_stack_t)); 3289 3290 // reference to use transport layer implementation 3291 hci_stack->hci_transport = transport; 3292 3293 // reference to used config 3294 hci_stack->config = config; 3295 3296 // setup pointer for outgoing packet buffer 3297 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3298 3299 // max acl payload size defined in config.h 3300 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3301 3302 // register packet handlers with transport 3303 transport->register_packet_handler(&packet_handler); 3304 3305 hci_stack->state = HCI_STATE_OFF; 3306 3307 // class of device 3308 hci_stack->class_of_device = 0x007a020c; // Smartphone 3309 3310 // bondable by default 3311 hci_stack->bondable = 1; 3312 3313 #ifdef ENABLE_CLASSIC 3314 // classic name 3315 hci_stack->local_name = default_classic_name; 3316 3317 // Master slave policy 3318 hci_stack->master_slave_policy = 1; 3319 3320 // Allow Role Switch 3321 hci_stack->allow_role_switch = 1; 3322 3323 // Default / minimum security level = 2 3324 hci_stack->gap_security_level = LEVEL_2; 3325 3326 // Default Security Mode 4 3327 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3328 3329 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3330 hci_stack->gap_required_encyrption_key_size = 7; 3331 3332 // Link Supervision Timeout 3333 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3334 3335 #endif 3336 3337 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3338 hci_stack->ssp_enable = 1; 3339 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3340 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3341 hci_stack->ssp_auto_accept = 1; 3342 3343 // Secure Connections: enable (requires support from Controller) 3344 hci_stack->secure_connections_enable = true; 3345 3346 // voice setting - signed 16 bit pcm data with CVSD over the air 3347 hci_stack->sco_voice_setting = 0x60; 3348 3349 #ifdef ENABLE_LE_CENTRAL 3350 // connection parameter to use for outgoing connections 3351 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3352 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3353 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3354 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3355 hci_stack->le_connection_latency = 4; // 4 3356 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3357 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3358 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3359 3360 // default LE Scanning 3361 hci_stack->le_scan_type = 0x1; // active 3362 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3363 hci_stack->le_scan_window = 0x30; // 30 ms 3364 #endif 3365 3366 #ifdef ENABLE_LE_PERIPHERAL 3367 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3368 #endif 3369 3370 // connection parameter range used to answer connection parameter update requests in l2cap 3371 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3372 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3373 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3374 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3375 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3376 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3377 3378 hci_state_reset(); 3379 } 3380 3381 void hci_deinit(void){ 3382 #ifdef HAVE_MALLOC 3383 if (hci_stack) { 3384 free(hci_stack); 3385 } 3386 #endif 3387 hci_stack = NULL; 3388 3389 #ifdef ENABLE_CLASSIC 3390 disable_l2cap_timeouts = 0; 3391 #endif 3392 } 3393 3394 /** 3395 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3396 */ 3397 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3398 hci_stack->chipset = chipset_driver; 3399 3400 // reset chipset driver - init is also called on power_up 3401 if (hci_stack->chipset && hci_stack->chipset->init){ 3402 hci_stack->chipset->init(hci_stack->config); 3403 } 3404 } 3405 3406 /** 3407 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3408 */ 3409 void hci_set_control(const btstack_control_t *hardware_control){ 3410 // references to used control implementation 3411 hci_stack->control = hardware_control; 3412 // init with transport config 3413 hardware_control->init(hci_stack->config); 3414 } 3415 3416 void hci_close(void){ 3417 3418 #ifdef ENABLE_CLASSIC 3419 // close remote device db 3420 if (hci_stack->link_key_db) { 3421 hci_stack->link_key_db->close(); 3422 } 3423 #endif 3424 3425 btstack_linked_list_iterator_t lit; 3426 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3427 while (btstack_linked_list_iterator_has_next(&lit)){ 3428 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3429 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3430 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3431 hci_shutdown_connection(connection); 3432 } 3433 3434 hci_power_control(HCI_POWER_OFF); 3435 3436 #ifdef HAVE_MALLOC 3437 free(hci_stack); 3438 #endif 3439 hci_stack = NULL; 3440 } 3441 3442 #ifdef HAVE_SCO_TRANSPORT 3443 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3444 hci_stack->sco_transport = sco_transport; 3445 sco_transport->register_packet_handler(&packet_handler); 3446 } 3447 #endif 3448 3449 #ifdef ENABLE_CLASSIC 3450 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3451 // validate ranage and set 3452 if (encryption_key_size < 7) return; 3453 if (encryption_key_size > 16) return; 3454 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3455 } 3456 3457 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3458 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3459 hci_stack->gap_security_mode = security_mode; 3460 return ERROR_CODE_SUCCESS; 3461 } else { 3462 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3463 } 3464 } 3465 3466 gap_security_mode_t gap_get_security_mode(void){ 3467 return hci_stack->gap_security_mode; 3468 } 3469 3470 void gap_set_security_level(gap_security_level_t security_level){ 3471 hci_stack->gap_security_level = security_level; 3472 } 3473 3474 gap_security_level_t gap_get_security_level(void){ 3475 return hci_stack->gap_security_level; 3476 } 3477 3478 void gap_set_secure_connections_only_mode(bool enable){ 3479 hci_stack->gap_secure_connections_only_mode = enable; 3480 } 3481 3482 bool gap_get_secure_connections_only_mode(void){ 3483 return hci_stack->gap_secure_connections_only_mode; 3484 } 3485 #endif 3486 3487 #ifdef ENABLE_CLASSIC 3488 void gap_set_class_of_device(uint32_t class_of_device){ 3489 hci_stack->class_of_device = class_of_device; 3490 } 3491 3492 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3493 hci_stack->default_link_policy_settings = default_link_policy_settings; 3494 } 3495 3496 void gap_set_allow_role_switch(bool allow_role_switch){ 3497 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3498 } 3499 3500 uint8_t hci_get_allow_role_switch(void){ 3501 return hci_stack->allow_role_switch; 3502 } 3503 3504 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3505 hci_stack->link_supervision_timeout = link_supervision_timeout; 3506 } 3507 3508 void hci_disable_l2cap_timeout_check(void){ 3509 disable_l2cap_timeouts = 1; 3510 } 3511 #endif 3512 3513 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3514 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3515 void hci_set_bd_addr(bd_addr_t addr){ 3516 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3517 hci_stack->custom_bd_addr_set = 1; 3518 } 3519 #endif 3520 3521 // State-Module-Driver overview 3522 // state module low-level 3523 // HCI_STATE_OFF off close 3524 // HCI_STATE_INITIALIZING, on open 3525 // HCI_STATE_WORKING, on open 3526 // HCI_STATE_HALTING, on open 3527 // HCI_STATE_SLEEPING, off/sleep close 3528 // HCI_STATE_FALLING_ASLEEP on open 3529 3530 static int hci_power_control_on(void){ 3531 3532 // power on 3533 int err = 0; 3534 if (hci_stack->control && hci_stack->control->on){ 3535 err = (*hci_stack->control->on)(); 3536 } 3537 if (err){ 3538 log_error( "POWER_ON failed"); 3539 hci_emit_hci_open_failed(); 3540 return err; 3541 } 3542 3543 // int chipset driver 3544 if (hci_stack->chipset && hci_stack->chipset->init){ 3545 hci_stack->chipset->init(hci_stack->config); 3546 } 3547 3548 // init transport 3549 if (hci_stack->hci_transport->init){ 3550 hci_stack->hci_transport->init(hci_stack->config); 3551 } 3552 3553 // open transport 3554 err = hci_stack->hci_transport->open(); 3555 if (err){ 3556 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3557 if (hci_stack->control && hci_stack->control->off){ 3558 (*hci_stack->control->off)(); 3559 } 3560 hci_emit_hci_open_failed(); 3561 return err; 3562 } 3563 return 0; 3564 } 3565 3566 static void hci_power_control_off(void){ 3567 3568 log_info("hci_power_control_off"); 3569 3570 // close low-level device 3571 hci_stack->hci_transport->close(); 3572 3573 log_info("hci_power_control_off - hci_transport closed"); 3574 3575 // power off 3576 if (hci_stack->control && hci_stack->control->off){ 3577 (*hci_stack->control->off)(); 3578 } 3579 3580 log_info("hci_power_control_off - control closed"); 3581 3582 hci_stack->state = HCI_STATE_OFF; 3583 } 3584 3585 static void hci_power_control_sleep(void){ 3586 3587 log_info("hci_power_control_sleep"); 3588 3589 #if 0 3590 // don't close serial port during sleep 3591 3592 // close low-level device 3593 hci_stack->hci_transport->close(hci_stack->config); 3594 #endif 3595 3596 // sleep mode 3597 if (hci_stack->control && hci_stack->control->sleep){ 3598 (*hci_stack->control->sleep)(); 3599 } 3600 3601 hci_stack->state = HCI_STATE_SLEEPING; 3602 } 3603 3604 static int hci_power_control_wake(void){ 3605 3606 log_info("hci_power_control_wake"); 3607 3608 // wake on 3609 if (hci_stack->control && hci_stack->control->wake){ 3610 (*hci_stack->control->wake)(); 3611 } 3612 3613 #if 0 3614 // open low-level device 3615 int err = hci_stack->hci_transport->open(hci_stack->config); 3616 if (err){ 3617 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3618 if (hci_stack->control && hci_stack->control->off){ 3619 (*hci_stack->control->off)(); 3620 } 3621 hci_emit_hci_open_failed(); 3622 return err; 3623 } 3624 #endif 3625 3626 return 0; 3627 } 3628 3629 static void hci_power_transition_to_initializing(void){ 3630 // set up state machine 3631 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3632 hci_stack->hci_packet_buffer_reserved = 0; 3633 hci_stack->state = HCI_STATE_INITIALIZING; 3634 hci_stack->substate = HCI_INIT_SEND_RESET; 3635 } 3636 3637 // returns error 3638 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3639 int err; 3640 switch (power_mode){ 3641 case HCI_POWER_ON: 3642 err = hci_power_control_on(); 3643 if (err != 0) { 3644 log_error("hci_power_control_on() error %d", err); 3645 return err; 3646 } 3647 hci_power_transition_to_initializing(); 3648 break; 3649 case HCI_POWER_OFF: 3650 // do nothing 3651 break; 3652 case HCI_POWER_SLEEP: 3653 // do nothing (with SLEEP == OFF) 3654 break; 3655 default: 3656 btstack_assert(false); 3657 break; 3658 } 3659 return ERROR_CODE_SUCCESS; 3660 } 3661 3662 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3663 switch (power_mode){ 3664 case HCI_POWER_ON: 3665 // do nothing 3666 break; 3667 case HCI_POWER_OFF: 3668 // no connections yet, just turn it off 3669 hci_power_control_off(); 3670 break; 3671 case HCI_POWER_SLEEP: 3672 // no connections yet, just turn it off 3673 hci_power_control_sleep(); 3674 break; 3675 default: 3676 btstack_assert(false); 3677 break; 3678 } 3679 return ERROR_CODE_SUCCESS; 3680 } 3681 3682 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3683 switch (power_mode){ 3684 case HCI_POWER_ON: 3685 // do nothing 3686 break; 3687 case HCI_POWER_OFF: 3688 // see hci_run 3689 hci_stack->state = HCI_STATE_HALTING; 3690 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3691 break; 3692 case HCI_POWER_SLEEP: 3693 // see hci_run 3694 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3695 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3696 break; 3697 default: 3698 btstack_assert(false); 3699 break; 3700 } 3701 return ERROR_CODE_SUCCESS; 3702 } 3703 3704 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3705 switch (power_mode){ 3706 case HCI_POWER_ON: 3707 hci_power_transition_to_initializing(); 3708 break; 3709 case HCI_POWER_OFF: 3710 // do nothing 3711 break; 3712 case HCI_POWER_SLEEP: 3713 // see hci_run 3714 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3715 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3716 break; 3717 default: 3718 btstack_assert(false); 3719 break; 3720 } 3721 return ERROR_CODE_SUCCESS; 3722 } 3723 3724 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3725 switch (power_mode){ 3726 case HCI_POWER_ON: 3727 3728 #ifdef HAVE_PLATFORM_IPHONE_OS 3729 // nothing to do, if H4 supports power management 3730 if (btstack_control_iphone_power_management_enabled()){ 3731 hci_stack->state = HCI_STATE_INITIALIZING; 3732 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3733 break; 3734 } 3735 #endif 3736 hci_power_transition_to_initializing(); 3737 break; 3738 case HCI_POWER_OFF: 3739 // see hci_run 3740 hci_stack->state = HCI_STATE_HALTING; 3741 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3742 break; 3743 case HCI_POWER_SLEEP: 3744 // do nothing 3745 break; 3746 default: 3747 btstack_assert(false); 3748 break; 3749 } 3750 return ERROR_CODE_SUCCESS; 3751 } 3752 3753 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3754 int err; 3755 switch (power_mode){ 3756 case HCI_POWER_ON: 3757 #ifdef HAVE_PLATFORM_IPHONE_OS 3758 // nothing to do, if H4 supports power management 3759 if (btstack_control_iphone_power_management_enabled()){ 3760 hci_stack->state = HCI_STATE_INITIALIZING; 3761 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3762 hci_update_scan_enable(); 3763 break; 3764 } 3765 #endif 3766 err = hci_power_control_wake(); 3767 if (err) return err; 3768 hci_power_transition_to_initializing(); 3769 break; 3770 case HCI_POWER_OFF: 3771 hci_stack->state = HCI_STATE_HALTING; 3772 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3773 break; 3774 case HCI_POWER_SLEEP: 3775 // do nothing 3776 break; 3777 default: 3778 btstack_assert(false); 3779 break; 3780 } 3781 return ERROR_CODE_SUCCESS; 3782 } 3783 3784 int hci_power_control(HCI_POWER_MODE power_mode){ 3785 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3786 int err = 0; 3787 switch (hci_stack->state){ 3788 case HCI_STATE_OFF: 3789 err = hci_power_control_state_off(power_mode); 3790 break; 3791 case HCI_STATE_INITIALIZING: 3792 err = hci_power_control_state_initializing(power_mode); 3793 break; 3794 case HCI_STATE_WORKING: 3795 err = hci_power_control_state_working(power_mode); 3796 break; 3797 case HCI_STATE_HALTING: 3798 err = hci_power_control_state_halting(power_mode); 3799 break; 3800 case HCI_STATE_FALLING_ASLEEP: 3801 err = hci_power_control_state_falling_asleep(power_mode); 3802 break; 3803 case HCI_STATE_SLEEPING: 3804 err = hci_power_control_state_sleeping(power_mode); 3805 break; 3806 default: 3807 btstack_assert(false); 3808 break; 3809 } 3810 if (err != 0){ 3811 return err; 3812 } 3813 3814 // create internal event 3815 hci_emit_state(); 3816 3817 // trigger next/first action 3818 hci_run(); 3819 3820 return 0; 3821 } 3822 3823 3824 #ifdef ENABLE_CLASSIC 3825 3826 static void hci_update_scan_enable(void){ 3827 // 2 = page scan, 1 = inq scan 3828 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3829 hci_run(); 3830 } 3831 3832 void gap_discoverable_control(uint8_t enable){ 3833 if (enable) enable = 1; // normalize argument 3834 3835 if (hci_stack->discoverable == enable){ 3836 hci_emit_discoverable_enabled(hci_stack->discoverable); 3837 return; 3838 } 3839 3840 hci_stack->discoverable = enable; 3841 hci_update_scan_enable(); 3842 } 3843 3844 void gap_connectable_control(uint8_t enable){ 3845 if (enable) enable = 1; // normalize argument 3846 3847 // don't emit event 3848 if (hci_stack->connectable == enable) return; 3849 3850 hci_stack->connectable = enable; 3851 hci_update_scan_enable(); 3852 } 3853 #endif 3854 3855 void gap_local_bd_addr(bd_addr_t address_buffer){ 3856 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3857 } 3858 3859 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3860 static void hci_host_num_completed_packets(void){ 3861 3862 // create packet manually as arrays are not supported and num_commands should not get reduced 3863 hci_reserve_packet_buffer(); 3864 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3865 3866 uint16_t size = 0; 3867 uint16_t num_handles = 0; 3868 packet[size++] = 0x35; 3869 packet[size++] = 0x0c; 3870 size++; // skip param len 3871 size++; // skip num handles 3872 3873 // add { handle, packets } entries 3874 btstack_linked_item_t * it; 3875 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3876 hci_connection_t * connection = (hci_connection_t *) it; 3877 if (connection->num_packets_completed){ 3878 little_endian_store_16(packet, size, connection->con_handle); 3879 size += 2; 3880 little_endian_store_16(packet, size, connection->num_packets_completed); 3881 size += 2; 3882 // 3883 num_handles++; 3884 connection->num_packets_completed = 0; 3885 } 3886 } 3887 3888 packet[2] = size - 3; 3889 packet[3] = num_handles; 3890 3891 hci_stack->host_completed_packets = 0; 3892 3893 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3894 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3895 3896 // release packet buffer for synchronous transport implementations 3897 if (hci_transport_synchronous()){ 3898 hci_release_packet_buffer(); 3899 hci_emit_transport_packet_sent(); 3900 } 3901 } 3902 #endif 3903 3904 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3905 UNUSED(ds); 3906 hci_stack->substate = HCI_HALTING_CLOSE; 3907 // allow packet handlers to defer final shutdown 3908 hci_emit_state(); 3909 hci_run(); 3910 } 3911 3912 static bool hci_run_acl_fragments(void){ 3913 if (hci_stack->acl_fragmentation_total_size > 0u) { 3914 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3915 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3916 if (connection) { 3917 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3918 hci_send_acl_packet_fragments(connection); 3919 return true; 3920 } 3921 } else { 3922 // connection gone -> discard further fragments 3923 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3924 hci_stack->acl_fragmentation_total_size = 0; 3925 hci_stack->acl_fragmentation_pos = 0; 3926 } 3927 } 3928 return false; 3929 } 3930 3931 #ifdef ENABLE_CLASSIC 3932 static bool hci_run_general_gap_classic(void){ 3933 3934 // decline incoming connections 3935 if (hci_stack->decline_reason){ 3936 uint8_t reason = hci_stack->decline_reason; 3937 hci_stack->decline_reason = 0; 3938 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3939 return true; 3940 } 3941 // write page scan activity 3942 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_interval != 0xffff) && hci_classic_supported()){ 3943 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 3944 hci_stack->new_page_scan_interval = 0xffff; 3945 hci_stack->new_page_scan_window = 0xffff; 3946 return true; 3947 } 3948 // write page scan type 3949 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_type != 0xff) && hci_classic_supported()){ 3950 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 3951 hci_stack->new_page_scan_type = 0xff; 3952 return true; 3953 } 3954 // send scan enable 3955 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3956 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3957 hci_stack->new_scan_enable_value = 0xff; 3958 return true; 3959 } 3960 // start/stop inquiry 3961 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3962 uint8_t duration = hci_stack->inquiry_state; 3963 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 3964 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 3965 return true; 3966 } 3967 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3968 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3969 hci_send_cmd(&hci_inquiry_cancel); 3970 return true; 3971 } 3972 // remote name request 3973 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3974 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3975 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3976 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3977 return true; 3978 } 3979 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3980 // Local OOB data 3981 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 3982 hci_stack->classic_read_local_oob_data = false; 3983 if (hci_stack->local_supported_commands[1] & 0x10u){ 3984 hci_send_cmd(&hci_read_local_extended_oob_data); 3985 } else { 3986 hci_send_cmd(&hci_read_local_oob_data); 3987 } 3988 } 3989 #endif 3990 // pairing 3991 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3992 uint8_t state = hci_stack->gap_pairing_state; 3993 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3994 uint8_t pin_code[16]; 3995 switch (state){ 3996 case GAP_PAIRING_STATE_SEND_PIN: 3997 memset(pin_code, 0, 16); 3998 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 3999 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4000 break; 4001 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4002 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4003 break; 4004 case GAP_PAIRING_STATE_SEND_PASSKEY: 4005 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4006 break; 4007 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4008 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4009 break; 4010 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4011 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4012 break; 4013 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4014 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4015 break; 4016 default: 4017 break; 4018 } 4019 return true; 4020 } 4021 return false; 4022 } 4023 #endif 4024 4025 #ifdef ENABLE_BLE 4026 static bool hci_run_general_gap_le(void){ 4027 4028 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4029 4030 if (hci_stack->state != HCI_STATE_WORKING) return false; 4031 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4032 4033 4034 // Phase 1: collect what to stop 4035 4036 bool scanning_stop = false; 4037 bool connecting_stop = false; 4038 bool advertising_stop = false; 4039 4040 #ifndef ENABLE_LE_CENTRAL 4041 UNUSED(scanning_stop); 4042 UNUSED(connecting_stop); 4043 #endif 4044 #ifndef ENABLE_LE_PERIPHERAL 4045 UNUSED(advertising_stop); 4046 #endif 4047 4048 // check if whitelist needs modification 4049 bool whitelist_modification_pending = false; 4050 btstack_linked_list_iterator_t lit; 4051 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4052 while (btstack_linked_list_iterator_has_next(&lit)){ 4053 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4054 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4055 whitelist_modification_pending = true; 4056 break; 4057 } 4058 } 4059 // check if resolving list needs modification 4060 bool resolving_list_modification_pending = false; 4061 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4062 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4063 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4064 resolving_list_modification_pending = true; 4065 } 4066 #endif 4067 4068 #ifdef ENABLE_LE_CENTRAL 4069 // scanning control 4070 if (hci_stack->le_scanning_active) { 4071 // stop if: 4072 // - parameter change required 4073 // - it's disabled 4074 // - whitelist change required but used for scanning 4075 // - resolving list modified 4076 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4077 if ((hci_stack->le_scanning_param_update) || 4078 !hci_stack->le_scanning_enabled || 4079 scanning_uses_whitelist || 4080 resolving_list_modification_pending){ 4081 4082 scanning_stop = true; 4083 } 4084 } 4085 #endif 4086 4087 #ifdef ENABLE_LE_CENTRAL 4088 // connecting control 4089 bool connecting_with_whitelist; 4090 switch (hci_stack->le_connecting_state){ 4091 case LE_CONNECTING_DIRECT: 4092 case LE_CONNECTING_WHITELIST: 4093 // stop connecting if: 4094 // - connecting uses white and whitelist modification pending 4095 // - if it got disabled 4096 // - resolving list modified 4097 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4098 if ((connecting_with_whitelist && whitelist_modification_pending) || 4099 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4100 resolving_list_modification_pending) { 4101 4102 connecting_stop = true; 4103 } 4104 break; 4105 default: 4106 break; 4107 } 4108 #endif 4109 4110 #ifdef ENABLE_LE_PERIPHERAL 4111 // le advertisement control 4112 if (hci_stack->le_advertisements_active){ 4113 // stop if: 4114 // - parameter change required 4115 // - it's disabled 4116 // - whitelist change required but used for advertisement filter policy 4117 // - resolving list modified 4118 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4119 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4120 if (advertising_change || 4121 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4122 (advertising_uses_whitelist & whitelist_modification_pending) || 4123 resolving_list_modification_pending) { 4124 4125 advertising_stop = true; 4126 } 4127 } 4128 #endif 4129 4130 4131 // Phase 2: stop everything that should be off during modifications 4132 4133 #ifdef ENABLE_LE_CENTRAL 4134 if (scanning_stop){ 4135 hci_stack->le_scanning_active = false; 4136 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4137 return true; 4138 } 4139 #endif 4140 4141 #ifdef ENABLE_LE_CENTRAL 4142 if (connecting_stop){ 4143 hci_send_cmd(&hci_le_create_connection_cancel); 4144 return true; 4145 } 4146 #endif 4147 4148 #ifdef ENABLE_LE_PERIPHERAL 4149 if (advertising_stop){ 4150 hci_stack->le_advertisements_active = false; 4151 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4152 return true; 4153 } 4154 #endif 4155 4156 // Phase 3: modify 4157 4158 #ifdef ENABLE_LE_CENTRAL 4159 if (hci_stack->le_scanning_param_update){ 4160 hci_stack->le_scanning_param_update = false; 4161 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4162 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4163 return true; 4164 } 4165 #endif 4166 4167 #ifdef ENABLE_LE_PERIPHERAL 4168 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4169 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4170 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4171 hci_send_cmd(&hci_le_set_advertising_parameters, 4172 hci_stack->le_advertisements_interval_min, 4173 hci_stack->le_advertisements_interval_max, 4174 hci_stack->le_advertisements_type, 4175 hci_stack->le_advertisements_own_addr_type, 4176 hci_stack->le_advertisements_direct_address_type, 4177 hci_stack->le_advertisements_direct_address, 4178 hci_stack->le_advertisements_channel_map, 4179 hci_stack->le_advertisements_filter_policy); 4180 return true; 4181 } 4182 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4183 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4184 uint8_t adv_data_clean[31]; 4185 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4186 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4187 hci_stack->le_advertisements_data_len); 4188 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4189 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4190 return true; 4191 } 4192 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4193 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4194 uint8_t scan_data_clean[31]; 4195 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4196 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4197 hci_stack->le_scan_response_data_len); 4198 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4199 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4200 return true; 4201 } 4202 #endif 4203 4204 4205 #ifdef ENABLE_LE_CENTRAL 4206 // if connect with whitelist was active and is not cancelled yet, wait until next time 4207 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4208 #endif 4209 4210 // LE Whitelist Management 4211 if (whitelist_modification_pending){ 4212 // add/remove entries 4213 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4214 while (btstack_linked_list_iterator_has_next(&lit)){ 4215 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4216 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4217 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4218 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4219 return true; 4220 } 4221 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4222 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4223 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4224 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4225 return true; 4226 } 4227 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4228 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4229 btstack_memory_whitelist_entry_free(entry); 4230 } 4231 } 4232 } 4233 4234 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4235 // LE Resolving List Management 4236 if (resolving_list_supported) { 4237 uint16_t i; 4238 switch (hci_stack->le_resolving_list_state) { 4239 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4240 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4241 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4242 return true; 4243 case LE_RESOLVING_LIST_READ_SIZE: 4244 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4245 hci_send_cmd(&hci_le_read_resolving_list_size); 4246 return true; 4247 case LE_RESOLVING_LIST_SEND_CLEAR: 4248 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4249 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4250 sizeof(hci_stack->le_resolving_list_add_entries)); 4251 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4252 sizeof(hci_stack->le_resolving_list_remove_entries)); 4253 hci_send_cmd(&hci_le_clear_resolving_list); 4254 return true; 4255 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4256 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4257 uint8_t offset = i >> 3; 4258 uint8_t mask = 1 << (i & 7); 4259 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4260 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4261 bd_addr_t peer_identity_addreses; 4262 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4263 sm_key_t peer_irk; 4264 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4265 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4266 4267 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4268 // trigger whitelist entry 'update' (work around for controller bug) 4269 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4270 while (btstack_linked_list_iterator_has_next(&lit)) { 4271 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4272 if (entry->address_type != peer_identity_addr_type) continue; 4273 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4274 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4275 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4276 } 4277 #endif 4278 4279 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4280 peer_identity_addreses); 4281 return true; 4282 } 4283 4284 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4285 4286 /* fall through */ 4287 4288 case LE_RESOLVING_LIST_ADD_ENTRIES: 4289 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4290 uint8_t offset = i >> 3; 4291 uint8_t mask = 1 << (i & 7); 4292 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4293 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4294 bd_addr_t peer_identity_addreses; 4295 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4296 sm_key_t peer_irk; 4297 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4298 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4299 const uint8_t *local_irk = gap_get_persistent_irk(); 4300 // command uses format specifier 'P' that stores 16-byte value without flip 4301 uint8_t local_irk_flipped[16]; 4302 uint8_t peer_irk_flipped[16]; 4303 reverse_128(local_irk, local_irk_flipped); 4304 reverse_128(peer_irk, peer_irk_flipped); 4305 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4306 peer_irk_flipped, local_irk_flipped); 4307 return true; 4308 } 4309 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4310 break; 4311 4312 default: 4313 break; 4314 } 4315 } 4316 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4317 #endif 4318 4319 // Phase 4: restore state 4320 4321 #ifdef ENABLE_LE_CENTRAL 4322 // re-start scanning 4323 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4324 hci_stack->le_scanning_active = true; 4325 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4326 return true; 4327 } 4328 #endif 4329 4330 #ifdef ENABLE_LE_CENTRAL 4331 // re-start connecting 4332 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4333 bd_addr_t null_addr; 4334 memset(null_addr, 0, 6); 4335 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4336 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4337 hci_send_cmd(&hci_le_create_connection, 4338 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4339 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4340 1, // use whitelist 4341 0, // peer address type 4342 null_addr, // peer bd addr 4343 hci_stack->le_connection_own_addr_type, // our addr type: 4344 hci_stack->le_connection_interval_min, // conn interval min 4345 hci_stack->le_connection_interval_max, // conn interval max 4346 hci_stack->le_connection_latency, // conn latency 4347 hci_stack->le_supervision_timeout, // conn latency 4348 hci_stack->le_minimum_ce_length, // min ce length 4349 hci_stack->le_maximum_ce_length // max ce length 4350 ); 4351 return true; 4352 } 4353 #endif 4354 4355 #ifdef ENABLE_LE_PERIPHERAL 4356 // re-start advertising 4357 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4358 // check if advertisements should be enabled given 4359 hci_stack->le_advertisements_active = true; 4360 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_advertisements_own_address); 4361 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4362 return true; 4363 } 4364 #endif 4365 4366 return false; 4367 } 4368 #endif 4369 4370 static bool hci_run_general_pending_commands(void){ 4371 btstack_linked_item_t * it; 4372 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4373 hci_connection_t * connection = (hci_connection_t *) it; 4374 4375 switch(connection->state){ 4376 case SEND_CREATE_CONNECTION: 4377 switch(connection->address_type){ 4378 #ifdef ENABLE_CLASSIC 4379 case BD_ADDR_TYPE_ACL: 4380 log_info("sending hci_create_connection"); 4381 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4382 break; 4383 #endif 4384 default: 4385 #ifdef ENABLE_BLE 4386 #ifdef ENABLE_LE_CENTRAL 4387 log_info("sending hci_le_create_connection"); 4388 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4389 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4390 hci_send_cmd(&hci_le_create_connection, 4391 hci_stack->le_connection_scan_interval, // conn scan interval 4392 hci_stack->le_connection_scan_window, // conn scan windows 4393 0, // don't use whitelist 4394 connection->address_type, // peer address type 4395 connection->address, // peer bd addr 4396 hci_stack->le_connection_own_addr_type, // our addr type: 4397 hci_stack->le_connection_interval_min, // conn interval min 4398 hci_stack->le_connection_interval_max, // conn interval max 4399 hci_stack->le_connection_latency, // conn latency 4400 hci_stack->le_supervision_timeout, // conn latency 4401 hci_stack->le_minimum_ce_length, // min ce length 4402 hci_stack->le_maximum_ce_length // max ce length 4403 ); 4404 connection->state = SENT_CREATE_CONNECTION; 4405 #endif 4406 #endif 4407 break; 4408 } 4409 return true; 4410 4411 #ifdef ENABLE_CLASSIC 4412 case RECEIVED_CONNECTION_REQUEST: 4413 connection->role = HCI_ROLE_SLAVE; 4414 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4415 log_info("sending hci_accept_connection_request"); 4416 connection->state = ACCEPTED_CONNECTION_REQUEST; 4417 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4418 } 4419 return true; 4420 #endif 4421 4422 #ifdef ENABLE_BLE 4423 #ifdef ENABLE_LE_CENTRAL 4424 case SEND_CANCEL_CONNECTION: 4425 connection->state = SENT_CANCEL_CONNECTION; 4426 hci_send_cmd(&hci_le_create_connection_cancel); 4427 return true; 4428 #endif 4429 #endif 4430 case SEND_DISCONNECT: 4431 connection->state = SENT_DISCONNECT; 4432 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4433 return true; 4434 4435 default: 4436 break; 4437 } 4438 4439 // no further commands if connection is about to get shut down 4440 if (connection->state == SENT_DISCONNECT) continue; 4441 4442 if (connection->authentication_flags & READ_RSSI){ 4443 connectionClearAuthenticationFlags(connection, READ_RSSI); 4444 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4445 return true; 4446 } 4447 4448 #ifdef ENABLE_CLASSIC 4449 4450 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4451 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4452 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4453 return true; 4454 } 4455 4456 // Handling link key request requires remote supported features 4457 if ( ((connection->authentication_flags & HANDLE_LINK_KEY_REQUEST) != 0) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4458 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4459 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4460 4461 // lookup link key using cached key first 4462 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4463 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4464 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4465 } 4466 4467 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4468 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4469 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(connection->link_key_type) == 1) && !sc_enabled_remote; 4470 if (sc_downgrade){ 4471 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4472 connection->state = SENT_DISCONNECT; 4473 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4474 return true; 4475 } 4476 4477 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4478 if (have_link_key && security_level_sufficient){ 4479 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4480 } else { 4481 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4482 } 4483 return true; 4484 } 4485 4486 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4487 log_info("denying to pin request"); 4488 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4489 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4490 return true; 4491 } 4492 4493 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4494 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4495 // set authentication requirements: 4496 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4497 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4498 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4499 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4500 authreq |= 1; 4501 } 4502 bool bonding = hci_stack->bondable; 4503 if (connection->authentication_flags & RECV_IO_CAPABILITIES_RESPONSE){ 4504 // if we have received IO Cap Response, we're in responder role 4505 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4506 if (bonding && !remote_bonding){ 4507 log_info("Remote not bonding, dropping local flag"); 4508 bonding = false; 4509 } 4510 } 4511 if (bonding){ 4512 if (connection->bonding_flags & BONDING_DEDICATED){ 4513 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4514 } else { 4515 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4516 } 4517 } 4518 uint8_t have_oob_data = 0; 4519 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4520 if (connection->classic_oob_c_192 != NULL){ 4521 have_oob_data |= 1; 4522 } 4523 if (connection->classic_oob_c_256 != NULL){ 4524 have_oob_data |= 2; 4525 } 4526 #endif 4527 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4528 return true; 4529 } 4530 4531 if (connection->authentication_flags & SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4532 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4533 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4534 return true; 4535 } 4536 4537 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4538 if (connection->authentication_flags & SEND_REMOTE_OOB_DATA_REPLY){ 4539 connectionClearAuthenticationFlags(connection, SEND_REMOTE_OOB_DATA_REPLY); 4540 const uint8_t zero[16] = { 0 }; 4541 const uint8_t * r_192 = zero; 4542 const uint8_t * c_192 = zero; 4543 const uint8_t * r_256 = zero; 4544 const uint8_t * c_256 = zero; 4545 // verify P-256 OOB 4546 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4547 c_256 = connection->classic_oob_c_256; 4548 if (connection->classic_oob_r_256 != NULL) { 4549 r_256 = connection->classic_oob_r_256; 4550 } 4551 } 4552 // verify P-192 OOB 4553 if ((connection->classic_oob_c_192 != NULL)) { 4554 c_192 = connection->classic_oob_c_192; 4555 if (connection->classic_oob_r_192 != NULL) { 4556 r_192 = connection->classic_oob_r_192; 4557 } 4558 } 4559 // Reply 4560 if (c_256 != zero) { 4561 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4562 } else if (c_192 != zero){ 4563 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4564 } else { 4565 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4566 } 4567 return true; 4568 } 4569 #endif 4570 4571 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4572 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4573 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4574 return true; 4575 } 4576 4577 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4578 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4579 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4580 return true; 4581 } 4582 4583 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4584 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4585 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4586 return true; 4587 } 4588 4589 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4590 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4591 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4592 return true; 4593 } 4594 4595 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4596 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4597 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4598 return true; 4599 } 4600 4601 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4602 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4603 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4604 connection->state = SENT_DISCONNECT; 4605 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4606 return true; 4607 } 4608 4609 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4610 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4611 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4612 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4613 return true; 4614 } 4615 4616 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4617 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4618 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4619 return true; 4620 } 4621 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4622 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4623 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4624 return true; 4625 } 4626 #endif 4627 4628 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4629 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4630 #ifdef ENABLE_CLASSIC 4631 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4632 #endif 4633 if (connection->state != SENT_DISCONNECT){ 4634 connection->state = SENT_DISCONNECT; 4635 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4636 return true; 4637 } 4638 } 4639 4640 #ifdef ENABLE_CLASSIC 4641 uint16_t sniff_min_interval; 4642 switch (connection->sniff_min_interval){ 4643 case 0: 4644 break; 4645 case 0xffff: 4646 connection->sniff_min_interval = 0; 4647 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4648 return true; 4649 default: 4650 sniff_min_interval = connection->sniff_min_interval; 4651 connection->sniff_min_interval = 0; 4652 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4653 return true; 4654 } 4655 4656 if (connection->sniff_subrating_max_latency != 0xffff){ 4657 uint16_t max_latency = connection->sniff_subrating_max_latency; 4658 connection->sniff_subrating_max_latency = 0; 4659 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4660 return true; 4661 } 4662 4663 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4664 uint8_t service_type = (uint8_t) connection->qos_service_type; 4665 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4666 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); 4667 return true; 4668 } 4669 4670 if (connection->request_role != HCI_ROLE_INVALID){ 4671 hci_role_t role = connection->request_role; 4672 connection->request_role = HCI_ROLE_INVALID; 4673 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4674 return true; 4675 } 4676 #endif 4677 4678 #ifdef ENABLE_BLE 4679 switch (connection->le_con_parameter_update_state){ 4680 // response to L2CAP CON PARAMETER UPDATE REQUEST 4681 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4682 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4683 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4684 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4685 0x0000, 0xffff); 4686 return true; 4687 case CON_PARAMETER_UPDATE_REPLY: 4688 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4689 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4690 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4691 0x0000, 0xffff); 4692 return true; 4693 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4694 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4695 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4696 return true; 4697 default: 4698 break; 4699 } 4700 if (connection->le_phy_update_all_phys != 0xffu){ 4701 uint8_t all_phys = connection->le_phy_update_all_phys; 4702 connection->le_phy_update_all_phys = 0xff; 4703 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); 4704 return true; 4705 } 4706 #endif 4707 } 4708 return false; 4709 } 4710 4711 static void hci_run(void){ 4712 4713 bool done; 4714 4715 // send continuation fragments first, as they block the prepared packet buffer 4716 done = hci_run_acl_fragments(); 4717 if (done) return; 4718 4719 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4720 // send host num completed packets next as they don't require num_cmd_packets > 0 4721 if (!hci_can_send_comand_packet_transport()) return; 4722 if (hci_stack->host_completed_packets){ 4723 hci_host_num_completed_packets(); 4724 return; 4725 } 4726 #endif 4727 4728 if (!hci_can_send_command_packet_now()) return; 4729 4730 // global/non-connection oriented commands 4731 4732 4733 #ifdef ENABLE_CLASSIC 4734 // general gap classic 4735 done = hci_run_general_gap_classic(); 4736 if (done) return; 4737 #endif 4738 4739 #ifdef ENABLE_BLE 4740 // general gap le 4741 done = hci_run_general_gap_le(); 4742 if (done) return; 4743 #endif 4744 4745 // send pending HCI commands 4746 done = hci_run_general_pending_commands(); 4747 if (done) return; 4748 4749 // stack state sub statemachines 4750 hci_connection_t * connection; 4751 switch (hci_stack->state){ 4752 case HCI_STATE_INITIALIZING: 4753 hci_initializing_run(); 4754 break; 4755 4756 case HCI_STATE_HALTING: 4757 4758 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4759 switch (hci_stack->substate){ 4760 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4761 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4762 4763 #ifdef ENABLE_BLE 4764 #ifdef ENABLE_LE_CENTRAL 4765 // free whitelist entries 4766 { 4767 btstack_linked_list_iterator_t lit; 4768 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4769 while (btstack_linked_list_iterator_has_next(&lit)){ 4770 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4771 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4772 btstack_memory_whitelist_entry_free(entry); 4773 } 4774 } 4775 #endif 4776 #endif 4777 // close all open connections 4778 connection = (hci_connection_t *) hci_stack->connections; 4779 if (connection){ 4780 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4781 if (!hci_can_send_command_packet_now()) return; 4782 4783 // check state 4784 if (connection->state == SENT_DISCONNECT) return; 4785 connection->state = SENT_DISCONNECT; 4786 4787 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4788 4789 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4790 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4791 4792 // ... which would be ignored anyway as we shutdown (free) the connection now 4793 hci_shutdown_connection(connection); 4794 4795 // finally, send the disconnect command 4796 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4797 return; 4798 } 4799 4800 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4801 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4802 log_info("HCI_STATE_HALTING: wait 50 ms"); 4803 hci_stack->substate = HCI_HALTING_W4_TIMER; 4804 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4805 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4806 btstack_run_loop_add_timer(&hci_stack->timeout); 4807 break; 4808 } 4809 4810 /* fall through */ 4811 4812 case HCI_HALTING_CLOSE: 4813 log_info("HCI_STATE_HALTING, calling off"); 4814 4815 // switch mode 4816 hci_power_control_off(); 4817 4818 log_info("HCI_STATE_HALTING, emitting state"); 4819 hci_emit_state(); 4820 log_info("HCI_STATE_HALTING, done"); 4821 break; 4822 4823 case HCI_HALTING_W4_TIMER: 4824 // keep waiting 4825 4826 break; 4827 default: 4828 break; 4829 } 4830 4831 break; 4832 4833 case HCI_STATE_FALLING_ASLEEP: 4834 switch(hci_stack->substate) { 4835 case HCI_FALLING_ASLEEP_DISCONNECT: 4836 log_info("HCI_STATE_FALLING_ASLEEP"); 4837 // close all open connections 4838 connection = (hci_connection_t *) hci_stack->connections; 4839 4840 #ifdef HAVE_PLATFORM_IPHONE_OS 4841 // don't close connections, if H4 supports power management 4842 if (btstack_control_iphone_power_management_enabled()){ 4843 connection = NULL; 4844 } 4845 #endif 4846 if (connection){ 4847 4848 // send disconnect 4849 if (!hci_can_send_command_packet_now()) return; 4850 4851 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4852 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4853 4854 // send disconnected event right away - causes higher layer connections to get closed, too. 4855 hci_shutdown_connection(connection); 4856 return; 4857 } 4858 4859 if (hci_classic_supported()){ 4860 // disable page and inquiry scan 4861 if (!hci_can_send_command_packet_now()) return; 4862 4863 log_info("HCI_STATE_HALTING, disabling inq scans"); 4864 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4865 4866 // continue in next sub state 4867 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4868 break; 4869 } 4870 4871 /* fall through */ 4872 4873 case HCI_FALLING_ASLEEP_COMPLETE: 4874 log_info("HCI_STATE_HALTING, calling sleep"); 4875 #ifdef HAVE_PLATFORM_IPHONE_OS 4876 // don't actually go to sleep, if H4 supports power management 4877 if (btstack_control_iphone_power_management_enabled()){ 4878 // SLEEP MODE reached 4879 hci_stack->state = HCI_STATE_SLEEPING; 4880 hci_emit_state(); 4881 break; 4882 } 4883 #endif 4884 // switch mode 4885 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4886 hci_emit_state(); 4887 break; 4888 4889 default: 4890 break; 4891 } 4892 break; 4893 4894 default: 4895 break; 4896 } 4897 } 4898 4899 int hci_send_cmd_packet(uint8_t *packet, int size){ 4900 // house-keeping 4901 4902 #ifdef ENABLE_CLASSIC 4903 bd_addr_t addr; 4904 hci_connection_t * conn; 4905 #endif 4906 #ifdef ENABLE_LE_CENTRAL 4907 uint8_t initiator_filter_policy; 4908 #endif 4909 4910 uint16_t opcode = little_endian_read_16(packet, 0); 4911 switch (opcode) { 4912 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4913 hci_stack->loopback_mode = packet[3]; 4914 break; 4915 4916 #ifdef ENABLE_CLASSIC 4917 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4918 reverse_bd_addr(&packet[3], addr); 4919 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4920 4921 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4922 if (!conn) { 4923 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4924 if (!conn) { 4925 // notify client that alloc failed 4926 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4927 return -1; // packet not sent to controller 4928 } 4929 conn->state = SEND_CREATE_CONNECTION; 4930 conn->role = HCI_ROLE_MASTER; 4931 } 4932 log_info("conn state %u", conn->state); 4933 switch (conn->state) { 4934 // if connection active exists 4935 case OPEN: 4936 // and OPEN, emit connection complete command 4937 hci_emit_connection_complete(addr, conn->con_handle, 0); 4938 return -1; // packet not sent to controller 4939 case RECEIVED_DISCONNECTION_COMPLETE: 4940 // create connection triggered in disconnect complete event, let's do it now 4941 break; 4942 case SEND_CREATE_CONNECTION: 4943 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4944 break; 4945 default: 4946 // otherwise, just ignore as it is already in the open process 4947 return -1; // packet not sent to controller 4948 } 4949 conn->state = SENT_CREATE_CONNECTION; 4950 4951 // track outgoing connection 4952 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4953 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4954 break; 4955 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4956 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4957 break; 4958 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4959 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4960 break; 4961 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4962 if (hci_stack->link_key_db) { 4963 reverse_bd_addr(&packet[3], addr); 4964 hci_stack->link_key_db->delete_link_key(addr); 4965 } 4966 break; 4967 4968 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 4969 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4970 // setup_synchronous_connection? Voice setting at offset 22 4971 // TODO: compare to current setting if sco connection already active 4972 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4973 break; 4974 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4975 // accept_synchronus_connection? Voice setting at offset 18 4976 // TODO: compare to current setting if sco connection already active 4977 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4978 break; 4979 #endif 4980 #endif 4981 4982 #ifdef ENABLE_BLE 4983 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4984 hci_stack->le_random_address_set = 1; 4985 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4986 break; 4987 #ifdef ENABLE_LE_PERIPHERAL 4988 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4989 hci_stack->le_advertisements_active = packet[3] != 0; 4990 break; 4991 #endif 4992 #ifdef ENABLE_LE_CENTRAL 4993 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4994 // white list used? 4995 initiator_filter_policy = packet[7]; 4996 switch (initiator_filter_policy) { 4997 case 0: 4998 // whitelist not used 4999 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5000 break; 5001 case 1: 5002 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5003 break; 5004 default: 5005 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5006 break; 5007 } 5008 // track outgoing connection 5009 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5010 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5011 break; 5012 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5013 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5014 break; 5015 #endif 5016 #endif 5017 default: 5018 break; 5019 } 5020 5021 hci_stack->num_cmd_packets--; 5022 5023 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5024 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5025 } 5026 5027 // disconnect because of security block 5028 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5029 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5030 if (!connection) return; 5031 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5032 } 5033 5034 5035 // Configure Secure Simple Pairing 5036 5037 #ifdef ENABLE_CLASSIC 5038 5039 // enable will enable SSP during init 5040 void gap_ssp_set_enable(int enable){ 5041 hci_stack->ssp_enable = enable; 5042 } 5043 5044 static int hci_local_ssp_activated(void){ 5045 return gap_ssp_supported() && hci_stack->ssp_enable; 5046 } 5047 5048 // if set, BTstack will respond to io capability request using authentication requirement 5049 void gap_ssp_set_io_capability(int io_capability){ 5050 hci_stack->ssp_io_capability = io_capability; 5051 } 5052 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5053 hci_stack->ssp_authentication_requirement = authentication_requirement; 5054 } 5055 5056 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5057 void gap_ssp_set_auto_accept(int auto_accept){ 5058 hci_stack->ssp_auto_accept = auto_accept; 5059 } 5060 5061 void gap_secure_connections_enable(bool enable){ 5062 hci_stack->secure_connections_enable = enable; 5063 } 5064 5065 #endif 5066 5067 // va_list part of hci_send_cmd 5068 int hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5069 if (!hci_can_send_command_packet_now()){ 5070 log_error("hci_send_cmd called but cannot send packet now"); 5071 return 0; 5072 } 5073 5074 // for HCI INITIALIZATION 5075 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5076 hci_stack->last_cmd_opcode = cmd->opcode; 5077 5078 hci_reserve_packet_buffer(); 5079 uint8_t * packet = hci_stack->hci_packet_buffer; 5080 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5081 int err = hci_send_cmd_packet(packet, size); 5082 5083 // release packet buffer on error or for synchronous transport implementations 5084 if ((err < 0) || hci_transport_synchronous()){ 5085 hci_release_packet_buffer(); 5086 hci_emit_transport_packet_sent(); 5087 } 5088 5089 return err; 5090 } 5091 5092 /** 5093 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5094 */ 5095 int hci_send_cmd(const hci_cmd_t * cmd, ...){ 5096 va_list argptr; 5097 va_start(argptr, cmd); 5098 int res = hci_send_cmd_va_arg(cmd, argptr); 5099 va_end(argptr); 5100 return res; 5101 } 5102 5103 // Create various non-HCI events. 5104 // TODO: generalize, use table similar to hci_create_command 5105 5106 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5107 // dump packet 5108 if (dump) { 5109 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5110 } 5111 5112 // dispatch to all event handlers 5113 btstack_linked_list_iterator_t it; 5114 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5115 while (btstack_linked_list_iterator_has_next(&it)){ 5116 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5117 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5118 } 5119 } 5120 5121 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5122 if (!hci_stack->acl_packet_handler) return; 5123 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5124 } 5125 5126 #ifdef ENABLE_CLASSIC 5127 static void hci_notify_if_sco_can_send_now(void){ 5128 // notify SCO sender if waiting 5129 if (!hci_stack->sco_waiting_for_can_send_now) return; 5130 if (hci_can_send_sco_packet_now()){ 5131 hci_stack->sco_waiting_for_can_send_now = 0; 5132 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5133 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5134 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5135 } 5136 } 5137 5138 // parsing end emitting has been merged to reduce code size 5139 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5140 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5141 5142 uint8_t * eir_data; 5143 ad_context_t context; 5144 const uint8_t * name; 5145 uint8_t name_len; 5146 5147 if (size < 3) return; 5148 5149 int event_type = hci_event_packet_get_type(packet); 5150 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5151 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5152 5153 switch (event_type){ 5154 case HCI_EVENT_INQUIRY_RESULT: 5155 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5156 if (size != (3 + (num_responses * 14))) return; 5157 break; 5158 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5159 if (size != 257) return; 5160 if (num_responses != 1) return; 5161 break; 5162 default: 5163 return; 5164 } 5165 5166 // event[1] is set at the end 5167 int i; 5168 for (i=0; i<num_responses;i++){ 5169 memset(event, 0, sizeof(event)); 5170 event[0] = GAP_EVENT_INQUIRY_RESULT; 5171 uint8_t event_size = 18; // if name is not set by EIR 5172 5173 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5174 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5175 (void)memcpy(&event[9], 5176 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5177 3); // class of device 5178 (void)memcpy(&event[12], 5179 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5180 2); // clock offset 5181 5182 switch (event_type){ 5183 case HCI_EVENT_INQUIRY_RESULT: 5184 // 14,15,16,17 = 0, size 18 5185 break; 5186 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5187 event[14] = 1; 5188 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5189 // 16,17 = 0, size 18 5190 break; 5191 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5192 event[14] = 1; 5193 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5194 // EIR packets only contain a single inquiry response 5195 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5196 name = NULL; 5197 // Iterate over EIR data 5198 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5199 uint8_t data_type = ad_iterator_get_data_type(&context); 5200 uint8_t data_size = ad_iterator_get_data_len(&context); 5201 const uint8_t * data = ad_iterator_get_data(&context); 5202 // Prefer Complete Local Name over Shortened Local Name 5203 switch (data_type){ 5204 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5205 if (name) continue; 5206 /* fall through */ 5207 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5208 name = data; 5209 name_len = data_size; 5210 break; 5211 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5212 if (data_size != 8) break; 5213 event[16] = 1; 5214 memcpy(&event[17], data, 8); 5215 break; 5216 default: 5217 break; 5218 } 5219 } 5220 if (name){ 5221 event[25] = 1; 5222 // truncate name if needed 5223 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5224 event[26] = len; 5225 (void)memcpy(&event[27], name, len); 5226 event_size += len; 5227 } 5228 break; 5229 default: 5230 return; 5231 } 5232 event[1] = event_size - 2; 5233 hci_emit_event(event, event_size, 1); 5234 } 5235 } 5236 #endif 5237 5238 void hci_emit_state(void){ 5239 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5240 uint8_t event[3]; 5241 event[0] = BTSTACK_EVENT_STATE; 5242 event[1] = sizeof(event) - 2u; 5243 event[2] = hci_stack->state; 5244 hci_emit_event(event, sizeof(event), 1); 5245 } 5246 5247 #ifdef ENABLE_CLASSIC 5248 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5249 uint8_t event[13]; 5250 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5251 event[1] = sizeof(event) - 2; 5252 event[2] = status; 5253 little_endian_store_16(event, 3, con_handle); 5254 reverse_bd_addr(address, &event[5]); 5255 event[11] = 1; // ACL connection 5256 event[12] = 0; // encryption disabled 5257 hci_emit_event(event, sizeof(event), 1); 5258 } 5259 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5260 if (disable_l2cap_timeouts) return; 5261 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5262 uint8_t event[4]; 5263 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5264 event[1] = sizeof(event) - 2; 5265 little_endian_store_16(event, 2, conn->con_handle); 5266 hci_emit_event(event, sizeof(event), 1); 5267 } 5268 #endif 5269 5270 #ifdef ENABLE_BLE 5271 #ifdef ENABLE_LE_CENTRAL 5272 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){ 5273 uint8_t event[21]; 5274 event[0] = HCI_EVENT_LE_META; 5275 event[1] = sizeof(event) - 2u; 5276 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5277 event[3] = status; 5278 little_endian_store_16(event, 4, con_handle); 5279 event[6] = 0; // TODO: role 5280 event[7] = address_type; 5281 reverse_bd_addr(address, &event[8]); 5282 little_endian_store_16(event, 14, 0); // interval 5283 little_endian_store_16(event, 16, 0); // latency 5284 little_endian_store_16(event, 18, 0); // supervision timeout 5285 event[20] = 0; // master clock accuracy 5286 hci_emit_event(event, sizeof(event), 1); 5287 } 5288 #endif 5289 #endif 5290 5291 static void hci_emit_transport_packet_sent(void){ 5292 // notify upper stack that it might be possible to send again 5293 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5294 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5295 } 5296 5297 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5298 uint8_t event[6]; 5299 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5300 event[1] = sizeof(event) - 2u; 5301 event[2] = 0; // status = OK 5302 little_endian_store_16(event, 3, con_handle); 5303 event[5] = reason; 5304 hci_emit_event(event, sizeof(event), 1); 5305 } 5306 5307 static void hci_emit_nr_connections_changed(void){ 5308 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5309 uint8_t event[3]; 5310 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5311 event[1] = sizeof(event) - 2u; 5312 event[2] = nr_hci_connections(); 5313 hci_emit_event(event, sizeof(event), 1); 5314 } 5315 5316 static void hci_emit_hci_open_failed(void){ 5317 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5318 uint8_t event[2]; 5319 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5320 event[1] = sizeof(event) - 2u; 5321 hci_emit_event(event, sizeof(event), 1); 5322 } 5323 5324 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5325 log_info("hci_emit_dedicated_bonding_result %u ", status); 5326 uint8_t event[9]; 5327 int pos = 0; 5328 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5329 event[pos++] = sizeof(event) - 2u; 5330 event[pos++] = status; 5331 reverse_bd_addr(address, &event[pos]); 5332 hci_emit_event(event, sizeof(event), 1); 5333 } 5334 5335 5336 #ifdef ENABLE_CLASSIC 5337 5338 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5339 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5340 uint8_t event[5]; 5341 int pos = 0; 5342 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5343 event[pos++] = sizeof(event) - 2; 5344 little_endian_store_16(event, 2, con_handle); 5345 pos += 2; 5346 event[pos++] = level; 5347 hci_emit_event(event, sizeof(event), 1); 5348 } 5349 5350 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5351 if (!connection) return LEVEL_0; 5352 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5353 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5354 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5355 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5356 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5357 // LEVEL 4 always requires 128 bit encrytion key size 5358 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5359 security_level = LEVEL_3; 5360 } 5361 return security_level; 5362 } 5363 5364 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5365 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5366 uint8_t event[3]; 5367 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5368 event[1] = sizeof(event) - 2; 5369 event[2] = enabled; 5370 hci_emit_event(event, sizeof(event), 1); 5371 } 5372 5373 // query if remote side supports eSCO 5374 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5375 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5376 if (!connection) return 0; 5377 return (connection->remote_supported_features[0] & 1) != 0; 5378 } 5379 5380 static bool hci_ssp_supported(hci_connection_t * connection){ 5381 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5382 return (connection->bonding_flags & mask) == mask; 5383 } 5384 5385 // query if remote side supports SSP 5386 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5387 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5388 if (!connection) return 0; 5389 return hci_ssp_supported(connection) ? 1 : 0; 5390 } 5391 5392 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5393 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5394 } 5395 5396 // GAP API 5397 /** 5398 * @bbrief enable/disable bonding. default is enabled 5399 * @praram enabled 5400 */ 5401 void gap_set_bondable_mode(int enable){ 5402 hci_stack->bondable = enable ? 1 : 0; 5403 } 5404 /** 5405 * @brief Get bondable mode. 5406 * @return 1 if bondable 5407 */ 5408 int gap_get_bondable_mode(void){ 5409 return hci_stack->bondable; 5410 } 5411 5412 /** 5413 * @brief map link keys to security levels 5414 */ 5415 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5416 switch (link_key_type){ 5417 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5418 return LEVEL_4; 5419 case COMBINATION_KEY: 5420 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5421 return LEVEL_3; 5422 default: 5423 return LEVEL_2; 5424 } 5425 } 5426 5427 /** 5428 * @brief map link keys to secure connection yes/no 5429 */ 5430 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5431 switch (link_key_type){ 5432 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5433 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5434 return 1; 5435 default: 5436 return 0; 5437 } 5438 } 5439 5440 /** 5441 * @brief map link keys to authenticated 5442 */ 5443 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5444 switch (link_key_type){ 5445 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5446 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5447 return 1; 5448 default: 5449 return 0; 5450 } 5451 } 5452 5453 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5454 log_info("gap_mitm_protection_required_for_security_level %u", level); 5455 return level > LEVEL_2; 5456 } 5457 5458 /** 5459 * @brief get current security level 5460 */ 5461 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5462 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5463 if (!connection) return LEVEL_0; 5464 return gap_security_level_for_connection(connection); 5465 } 5466 5467 /** 5468 * @brief request connection to device to 5469 * @result GAP_AUTHENTICATION_RESULT 5470 */ 5471 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5472 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5473 if (!connection){ 5474 hci_emit_security_level(con_handle, LEVEL_0); 5475 return; 5476 } 5477 5478 btstack_assert(hci_is_le_connection(connection) == false); 5479 5480 gap_security_level_t current_level = gap_security_level(con_handle); 5481 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5482 requested_level, connection->requested_security_level, current_level); 5483 5484 // authentication active if authentication request was sent or planned level > 0 5485 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5486 if (authentication_active){ 5487 // authentication already active 5488 if (connection->requested_security_level < requested_level){ 5489 // increase requested level as new level is higher 5490 // TODO: handle re-authentication when done 5491 connection->requested_security_level = requested_level; 5492 } 5493 } else { 5494 // no request active, notify if security sufficient 5495 if (requested_level <= current_level){ 5496 hci_emit_security_level(con_handle, current_level); 5497 return; 5498 } 5499 5500 // store request 5501 connection->requested_security_level = requested_level; 5502 5503 // start to authenticate connection 5504 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5505 hci_run(); 5506 } 5507 } 5508 5509 /** 5510 * @brief start dedicated bonding with device. disconnect after bonding 5511 * @param device 5512 * @param request MITM protection 5513 * @result GAP_DEDICATED_BONDING_COMPLETE 5514 */ 5515 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5516 5517 // create connection state machine 5518 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5519 5520 if (!connection){ 5521 return BTSTACK_MEMORY_ALLOC_FAILED; 5522 } 5523 5524 // delete linkn key 5525 gap_drop_link_key_for_bd_addr(device); 5526 5527 // configure LEVEL_2/3, dedicated bonding 5528 connection->state = SEND_CREATE_CONNECTION; 5529 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5530 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5531 connection->bonding_flags = BONDING_DEDICATED; 5532 5533 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5534 5535 // handle: connnection failure (connection complete != ok) 5536 // handle: authentication failure 5537 // handle: disconnect on done 5538 5539 hci_run(); 5540 5541 return 0; 5542 } 5543 #endif 5544 5545 void gap_set_local_name(const char * local_name){ 5546 hci_stack->local_name = local_name; 5547 } 5548 5549 5550 #ifdef ENABLE_BLE 5551 5552 #ifdef ENABLE_LE_CENTRAL 5553 void gap_start_scan(void){ 5554 hci_stack->le_scanning_enabled = true; 5555 hci_run(); 5556 } 5557 5558 void gap_stop_scan(void){ 5559 hci_stack->le_scanning_enabled = false; 5560 hci_run(); 5561 } 5562 5563 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5564 hci_stack->le_scan_type = scan_type; 5565 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5566 hci_stack->le_scan_interval = scan_interval; 5567 hci_stack->le_scan_window = scan_window; 5568 hci_stack->le_scanning_param_update = true; 5569 hci_run(); 5570 } 5571 5572 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5573 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5574 } 5575 5576 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5577 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5578 if (!conn){ 5579 // disallow if le connection is already outgoing 5580 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5581 log_error("le connection already active"); 5582 return ERROR_CODE_COMMAND_DISALLOWED; 5583 } 5584 5585 log_info("gap_connect: no connection exists yet, creating context"); 5586 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5587 if (!conn){ 5588 // notify client that alloc failed 5589 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5590 log_info("gap_connect: failed to alloc hci_connection_t"); 5591 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5592 } 5593 5594 // set le connecting state 5595 if (hci_is_le_connection_type(addr_type)){ 5596 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5597 } 5598 5599 conn->state = SEND_CREATE_CONNECTION; 5600 log_info("gap_connect: send create connection next"); 5601 hci_run(); 5602 return ERROR_CODE_SUCCESS; 5603 } 5604 5605 if (!hci_is_le_connection(conn) || 5606 (conn->state == SEND_CREATE_CONNECTION) || 5607 (conn->state == SENT_CREATE_CONNECTION)) { 5608 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5609 log_error("gap_connect: classic connection or connect is already being created"); 5610 return GATT_CLIENT_IN_WRONG_STATE; 5611 } 5612 5613 // check if connection was just disconnected 5614 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5615 log_info("gap_connect: send create connection (again)"); 5616 conn->state = SEND_CREATE_CONNECTION; 5617 hci_run(); 5618 return ERROR_CODE_SUCCESS; 5619 } 5620 5621 log_info("gap_connect: context exists with state %u", conn->state); 5622 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5623 hci_run(); 5624 return ERROR_CODE_SUCCESS; 5625 } 5626 5627 // @assumption: only a single outgoing LE Connection exists 5628 static hci_connection_t * gap_get_outgoing_connection(void){ 5629 btstack_linked_item_t *it; 5630 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5631 hci_connection_t * conn = (hci_connection_t *) it; 5632 if (!hci_is_le_connection(conn)) continue; 5633 switch (conn->state){ 5634 case SEND_CREATE_CONNECTION: 5635 case SENT_CREATE_CONNECTION: 5636 case SENT_CANCEL_CONNECTION: 5637 return conn; 5638 default: 5639 break; 5640 }; 5641 } 5642 return NULL; 5643 } 5644 5645 uint8_t gap_connect_cancel(void){ 5646 hci_connection_t * conn = gap_get_outgoing_connection(); 5647 if (!conn) return 0; 5648 switch (conn->state){ 5649 case SEND_CREATE_CONNECTION: 5650 // skip sending create connection and emit event instead 5651 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5652 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5653 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5654 btstack_memory_hci_connection_free( conn ); 5655 break; 5656 case SENT_CREATE_CONNECTION: 5657 // request to send cancel connection 5658 conn->state = SEND_CANCEL_CONNECTION; 5659 hci_run(); 5660 break; 5661 default: 5662 break; 5663 } 5664 return 0; 5665 } 5666 #endif 5667 5668 #ifdef ENABLE_LE_CENTRAL 5669 /** 5670 * @brief Set connection parameters for outgoing connections 5671 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5672 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5673 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5674 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5675 * @param conn_latency, default: 4 5676 * @param supervision_timeout (unit: 10ms), default: 720 ms 5677 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5678 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5679 */ 5680 5681 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5682 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5683 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5684 hci_stack->le_connection_scan_interval = conn_scan_interval; 5685 hci_stack->le_connection_scan_window = conn_scan_window; 5686 hci_stack->le_connection_interval_min = conn_interval_min; 5687 hci_stack->le_connection_interval_max = conn_interval_max; 5688 hci_stack->le_connection_latency = conn_latency; 5689 hci_stack->le_supervision_timeout = supervision_timeout; 5690 hci_stack->le_minimum_ce_length = min_ce_length; 5691 hci_stack->le_maximum_ce_length = max_ce_length; 5692 } 5693 #endif 5694 5695 /** 5696 * @brief Updates the connection parameters for a given LE connection 5697 * @param handle 5698 * @param conn_interval_min (unit: 1.25ms) 5699 * @param conn_interval_max (unit: 1.25ms) 5700 * @param conn_latency 5701 * @param supervision_timeout (unit: 10ms) 5702 * @returns 0 if ok 5703 */ 5704 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5705 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5706 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5707 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5708 connection->le_conn_interval_min = conn_interval_min; 5709 connection->le_conn_interval_max = conn_interval_max; 5710 connection->le_conn_latency = conn_latency; 5711 connection->le_supervision_timeout = supervision_timeout; 5712 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5713 hci_run(); 5714 return 0; 5715 } 5716 5717 /** 5718 * @brief Request an update of the connection parameter for a given LE connection 5719 * @param handle 5720 * @param conn_interval_min (unit: 1.25ms) 5721 * @param conn_interval_max (unit: 1.25ms) 5722 * @param conn_latency 5723 * @param supervision_timeout (unit: 10ms) 5724 * @returns 0 if ok 5725 */ 5726 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5727 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5728 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5729 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5730 connection->le_conn_interval_min = conn_interval_min; 5731 connection->le_conn_interval_max = conn_interval_max; 5732 connection->le_conn_latency = conn_latency; 5733 connection->le_supervision_timeout = supervision_timeout; 5734 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5735 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5736 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5737 return 0; 5738 } 5739 5740 #ifdef ENABLE_LE_PERIPHERAL 5741 5742 /** 5743 * @brief Set Advertisement Data 5744 * @param advertising_data_length 5745 * @param advertising_data (max 31 octets) 5746 * @note data is not copied, pointer has to stay valid 5747 */ 5748 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5749 hci_stack->le_advertisements_data_len = advertising_data_length; 5750 hci_stack->le_advertisements_data = advertising_data; 5751 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5752 hci_run(); 5753 } 5754 5755 /** 5756 * @brief Set Scan Response Data 5757 * @param advertising_data_length 5758 * @param advertising_data (max 31 octets) 5759 * @note data is not copied, pointer has to stay valid 5760 */ 5761 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5762 hci_stack->le_scan_response_data_len = scan_response_data_length; 5763 hci_stack->le_scan_response_data = scan_response_data; 5764 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5765 hci_run(); 5766 } 5767 5768 /** 5769 * @brief Set Advertisement Parameters 5770 * @param adv_int_min 5771 * @param adv_int_max 5772 * @param adv_type 5773 * @param direct_address_type 5774 * @param direct_address 5775 * @param channel_map 5776 * @param filter_policy 5777 * 5778 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5779 */ 5780 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5781 uint8_t direct_address_typ, bd_addr_t direct_address, 5782 uint8_t channel_map, uint8_t filter_policy) { 5783 5784 hci_stack->le_advertisements_interval_min = adv_int_min; 5785 hci_stack->le_advertisements_interval_max = adv_int_max; 5786 hci_stack->le_advertisements_type = adv_type; 5787 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5788 hci_stack->le_advertisements_channel_map = channel_map; 5789 hci_stack->le_advertisements_filter_policy = filter_policy; 5790 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5791 6); 5792 5793 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 5794 hci_run(); 5795 } 5796 5797 /** 5798 * @brief Enable/Disable Advertisements 5799 * @param enabled 5800 */ 5801 void gap_advertisements_enable(int enabled){ 5802 hci_stack->le_advertisements_enabled = enabled != 0; 5803 hci_update_advertisements_enabled_for_current_roles(); 5804 hci_run(); 5805 } 5806 5807 #endif 5808 5809 void hci_le_set_own_address_type(uint8_t own_address_type){ 5810 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5811 if (own_address_type == hci_stack->le_own_addr_type) return; 5812 hci_stack->le_own_addr_type = own_address_type; 5813 5814 #ifdef ENABLE_LE_PERIPHERAL 5815 // update advertisement parameters, too 5816 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5817 hci_run(); 5818 #endif 5819 #ifdef ENABLE_LE_CENTRAL 5820 // note: we don't update scan parameters or modify ongoing connection attempts 5821 #endif 5822 } 5823 5824 #endif 5825 5826 uint8_t gap_disconnect(hci_con_handle_t handle){ 5827 hci_connection_t * conn = hci_connection_for_handle(handle); 5828 if (!conn){ 5829 hci_emit_disconnection_complete(handle, 0); 5830 return 0; 5831 } 5832 // ignore if already disconnected 5833 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5834 return 0; 5835 } 5836 conn->state = SEND_DISCONNECT; 5837 hci_run(); 5838 return 0; 5839 } 5840 5841 int gap_read_rssi(hci_con_handle_t con_handle){ 5842 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5843 if (hci_connection == NULL) return 0; 5844 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5845 hci_run(); 5846 return 1; 5847 } 5848 5849 /** 5850 * @brief Get connection type 5851 * @param con_handle 5852 * @result connection_type 5853 */ 5854 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5855 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5856 if (!conn) return GAP_CONNECTION_INVALID; 5857 switch (conn->address_type){ 5858 case BD_ADDR_TYPE_LE_PUBLIC: 5859 case BD_ADDR_TYPE_LE_RANDOM: 5860 return GAP_CONNECTION_LE; 5861 case BD_ADDR_TYPE_SCO: 5862 return GAP_CONNECTION_SCO; 5863 case BD_ADDR_TYPE_ACL: 5864 return GAP_CONNECTION_ACL; 5865 default: 5866 return GAP_CONNECTION_INVALID; 5867 } 5868 } 5869 5870 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5871 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5872 if (!conn) return HCI_ROLE_INVALID; 5873 return (hci_role_t) conn->role; 5874 } 5875 5876 5877 #ifdef ENABLE_CLASSIC 5878 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5879 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5880 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5881 conn->request_role = role; 5882 hci_run(); 5883 return ERROR_CODE_SUCCESS; 5884 } 5885 #endif 5886 5887 #ifdef ENABLE_BLE 5888 5889 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){ 5890 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5891 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5892 5893 conn->le_phy_update_all_phys = all_phys; 5894 conn->le_phy_update_tx_phys = tx_phys; 5895 conn->le_phy_update_rx_phys = rx_phys; 5896 conn->le_phy_update_phy_options = phy_options; 5897 5898 hci_run(); 5899 5900 return 0; 5901 } 5902 5903 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5904 // check if already in list 5905 btstack_linked_list_iterator_t it; 5906 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5907 while (btstack_linked_list_iterator_has_next(&it)) { 5908 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5909 if (entry->address_type != address_type) { 5910 continue; 5911 } 5912 if (memcmp(entry->address, address, 6) != 0) { 5913 continue; 5914 } 5915 // disallow if already scheduled to add 5916 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5917 return ERROR_CODE_COMMAND_DISALLOWED; 5918 } 5919 // still on controller, but scheduled to remove -> re-add 5920 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5921 return ERROR_CODE_SUCCESS; 5922 } 5923 // alloc and add to list 5924 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5925 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5926 entry->address_type = address_type; 5927 (void)memcpy(entry->address, address, 6); 5928 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5929 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5930 return ERROR_CODE_SUCCESS; 5931 } 5932 5933 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5934 btstack_linked_list_iterator_t it; 5935 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5936 while (btstack_linked_list_iterator_has_next(&it)){ 5937 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5938 if (entry->address_type != address_type) { 5939 continue; 5940 } 5941 if (memcmp(entry->address, address, 6) != 0) { 5942 continue; 5943 } 5944 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5945 // remove from controller if already present 5946 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5947 } else { 5948 // directly remove entry from whitelist 5949 btstack_linked_list_iterator_remove(&it); 5950 btstack_memory_whitelist_entry_free(entry); 5951 } 5952 return ERROR_CODE_SUCCESS; 5953 } 5954 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5955 } 5956 5957 static void hci_whitelist_clear(void){ 5958 btstack_linked_list_iterator_t it; 5959 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5960 while (btstack_linked_list_iterator_has_next(&it)){ 5961 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5962 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5963 // remove from controller if already present 5964 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5965 continue; 5966 } 5967 // directly remove entry from whitelist 5968 btstack_linked_list_iterator_remove(&it); 5969 btstack_memory_whitelist_entry_free(entry); 5970 } 5971 } 5972 5973 /** 5974 * @brief Clear Whitelist 5975 * @returns 0 if ok 5976 */ 5977 uint8_t gap_whitelist_clear(void){ 5978 hci_whitelist_clear(); 5979 hci_run(); 5980 return ERROR_CODE_SUCCESS; 5981 } 5982 5983 /** 5984 * @brief Add Device to Whitelist 5985 * @param address_typ 5986 * @param address 5987 * @returns 0 if ok 5988 */ 5989 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5990 uint8_t status = hci_whitelist_add(address_type, address); 5991 if (status){ 5992 return status; 5993 } 5994 hci_run(); 5995 return ERROR_CODE_SUCCESS; 5996 } 5997 5998 /** 5999 * @brief Remove Device from Whitelist 6000 * @param address_typ 6001 * @param address 6002 * @returns 0 if ok 6003 */ 6004 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6005 uint8_t status = hci_whitelist_remove(address_type, address); 6006 if (status){ 6007 return status; 6008 } 6009 hci_run(); 6010 return ERROR_CODE_SUCCESS; 6011 } 6012 6013 #ifdef ENABLE_LE_CENTRAL 6014 /** 6015 * @brief Connect with Whitelist 6016 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6017 * @returns - if ok 6018 */ 6019 uint8_t gap_connect_with_whitelist(void){ 6020 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6021 return ERROR_CODE_COMMAND_DISALLOWED; 6022 } 6023 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6024 hci_run(); 6025 return ERROR_CODE_SUCCESS; 6026 } 6027 6028 /** 6029 * @brief Auto Connection Establishment - Start Connecting to device 6030 * @param address_typ 6031 * @param address 6032 * @returns 0 if ok 6033 */ 6034 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6035 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6036 return ERROR_CODE_COMMAND_DISALLOWED; 6037 } 6038 6039 uint8_t status = hci_whitelist_add(address_type, address); 6040 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6041 return status; 6042 } 6043 6044 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6045 6046 hci_run(); 6047 return ERROR_CODE_SUCCESS; 6048 } 6049 6050 /** 6051 * @brief Auto Connection Establishment - Stop Connecting to device 6052 * @param address_typ 6053 * @param address 6054 * @returns 0 if ok 6055 */ 6056 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6057 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6058 return ERROR_CODE_COMMAND_DISALLOWED; 6059 } 6060 6061 hci_whitelist_remove(address_type, address); 6062 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6063 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6064 } 6065 hci_run(); 6066 return 0; 6067 } 6068 6069 /** 6070 * @brief Auto Connection Establishment - Stop everything 6071 * @note Convenience function to stop all active auto connection attempts 6072 */ 6073 uint8_t gap_auto_connection_stop_all(void){ 6074 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6075 return ERROR_CODE_COMMAND_DISALLOWED; 6076 } 6077 hci_whitelist_clear(); 6078 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6079 hci_run(); 6080 return ERROR_CODE_SUCCESS; 6081 } 6082 6083 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6084 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6085 if (!conn) return 0; 6086 return conn->le_connection_interval; 6087 } 6088 #endif 6089 #endif 6090 6091 #ifdef ENABLE_CLASSIC 6092 /** 6093 * @brief Set Extended Inquiry Response data 6094 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6095 * @note has to be done before stack starts up 6096 */ 6097 void gap_set_extended_inquiry_response(const uint8_t * data){ 6098 hci_stack->eir_data = data; 6099 } 6100 6101 /** 6102 * @brief Start GAP Classic Inquiry 6103 * @param duration in 1.28s units 6104 * @return 0 if ok 6105 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6106 */ 6107 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6108 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6109 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6110 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6111 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6112 } 6113 hci_stack->inquiry_state = duration_in_1280ms_units; 6114 hci_run(); 6115 return 0; 6116 } 6117 6118 /** 6119 * @brief Stop GAP Classic Inquiry 6120 * @returns 0 if ok 6121 */ 6122 int gap_inquiry_stop(void){ 6123 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6124 // emit inquiry complete event, before it even started 6125 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6126 hci_emit_event(event, sizeof(event), 1); 6127 return 0; 6128 } 6129 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6130 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6131 hci_run(); 6132 return 0; 6133 } 6134 6135 void gap_inquiry_set_lap(uint32_t lap){ 6136 hci_stack->inquiry_lap = lap; 6137 } 6138 6139 6140 /** 6141 * @brief Remote Name Request 6142 * @param addr 6143 * @param page_scan_repetition_mode 6144 * @param clock_offset only used when bit 15 is set 6145 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6146 */ 6147 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6148 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6149 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6150 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6151 hci_stack->remote_name_clock_offset = clock_offset; 6152 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6153 hci_run(); 6154 return 0; 6155 } 6156 6157 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6158 hci_stack->gap_pairing_state = state; 6159 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6160 hci_run(); 6161 return 0; 6162 } 6163 6164 /** 6165 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6166 * @param addr 6167 * @param pin_data 6168 * @param pin_len 6169 * @return 0 if ok 6170 */ 6171 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6172 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6173 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6174 hci_stack->gap_pairing_pin_len = pin_len; 6175 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6176 } 6177 6178 /** 6179 * @brief Legacy Pairing Pin Code Response 6180 * @param addr 6181 * @param pin 6182 * @return 0 if ok 6183 */ 6184 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6185 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6186 } 6187 6188 /** 6189 * @brief Abort Legacy Pairing 6190 * @param addr 6191 * @param pin 6192 * @return 0 if ok 6193 */ 6194 int gap_pin_code_negative(bd_addr_t addr){ 6195 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6196 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6197 } 6198 6199 /** 6200 * @brief SSP Passkey Response 6201 * @param addr 6202 * @param passkey 6203 * @return 0 if ok 6204 */ 6205 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6206 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6207 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6208 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6209 } 6210 6211 /** 6212 * @brief Abort SSP Passkey Entry/Pairing 6213 * @param addr 6214 * @param pin 6215 * @return 0 if ok 6216 */ 6217 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6218 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6219 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6220 } 6221 6222 /** 6223 * @brief Accept SSP Numeric Comparison 6224 * @param addr 6225 * @param passkey 6226 * @return 0 if ok 6227 */ 6228 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6229 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6230 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6231 } 6232 6233 /** 6234 * @brief Abort SSP Numeric Comparison/Pairing 6235 * @param addr 6236 * @param pin 6237 * @return 0 if ok 6238 */ 6239 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6240 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6241 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6242 } 6243 6244 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6245 6246 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6247 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6248 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6249 connectionSetAuthenticationFlags(conn, flag); 6250 hci_run(); 6251 return ERROR_CODE_SUCCESS; 6252 } 6253 6254 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6255 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_REPLY); 6256 } 6257 6258 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6259 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6260 } 6261 #endif 6262 6263 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6264 /** 6265 * @brief Report Remote OOB Data 6266 * @param bd_addr 6267 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6268 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6269 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6270 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6271 */ 6272 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){ 6273 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6274 if (connection == NULL) { 6275 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6276 } 6277 connection->classic_oob_c_192 = c_192; 6278 connection->classic_oob_r_192 = r_192; 6279 connection->classic_oob_c_256 = c_256; 6280 connection->classic_oob_r_256 = r_256; 6281 return ERROR_CODE_SUCCESS; 6282 } 6283 /** 6284 * @brief Generate new OOB data 6285 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6286 */ 6287 void gap_ssp_generate_oob_data(void){ 6288 hci_stack->classic_read_local_oob_data = true; 6289 hci_run(); 6290 } 6291 6292 #endif 6293 6294 /** 6295 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6296 * @param inquiry_mode see bluetooth_defines.h 6297 */ 6298 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6299 hci_stack->inquiry_mode = inquiry_mode; 6300 } 6301 6302 /** 6303 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6304 */ 6305 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6306 hci_stack->sco_voice_setting = voice_setting; 6307 } 6308 6309 /** 6310 * @brief Get SCO Voice Setting 6311 * @return current voice setting 6312 */ 6313 uint16_t hci_get_sco_voice_setting(void){ 6314 return hci_stack->sco_voice_setting; 6315 } 6316 6317 static int hci_have_usb_transport(void){ 6318 if (!hci_stack->hci_transport) return 0; 6319 const char * transport_name = hci_stack->hci_transport->name; 6320 if (!transport_name) return 0; 6321 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6322 } 6323 6324 /** @brief Get SCO packet length for current SCO Voice setting 6325 * @note Using SCO packets of the exact length is required for USB transfer 6326 * @return Length of SCO packets in bytes (not audio frames) 6327 */ 6328 int hci_get_sco_packet_length(void){ 6329 int sco_packet_length = 0; 6330 6331 #ifdef ENABLE_SCO_OVER_HCI 6332 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6333 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6334 6335 if (hci_have_usb_transport()){ 6336 // see Core Spec for H2 USB Transfer. 6337 // 3 byte SCO header + 24 bytes per connection 6338 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6339 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6340 } else { 6341 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6342 sco_packet_length = 3 + 60 * multiplier; 6343 // assert that it still fits inside an SCO buffer 6344 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6345 sco_packet_length = 3 + 60; 6346 } 6347 } 6348 #endif 6349 6350 #ifdef HAVE_SCO_TRANSPORT 6351 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6352 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6353 sco_packet_length = 3 + 60 * multiplier; 6354 #endif 6355 return sco_packet_length; 6356 } 6357 6358 /** 6359 * @brief Sets the master/slave policy 6360 * @param policy (0: attempt to become master, 1: let connecting device decide) 6361 */ 6362 void hci_set_master_slave_policy(uint8_t policy){ 6363 hci_stack->master_slave_policy = policy; 6364 } 6365 6366 #endif 6367 6368 HCI_STATE hci_get_state(void){ 6369 return hci_stack->state; 6370 } 6371 6372 #ifdef ENABLE_CLASSIC 6373 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6374 hci_stack->gap_classic_accept_callback = accept_callback; 6375 } 6376 #endif 6377 6378 /** 6379 * @brief Set callback for Bluetooth Hardware Error 6380 */ 6381 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6382 hci_stack->hardware_error_callback = fn; 6383 } 6384 6385 void hci_disconnect_all(void){ 6386 btstack_linked_list_iterator_t it; 6387 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6388 while (btstack_linked_list_iterator_has_next(&it)){ 6389 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6390 if (con->state == SENT_DISCONNECT) continue; 6391 con->state = SEND_DISCONNECT; 6392 } 6393 hci_run(); 6394 } 6395 6396 uint16_t hci_get_manufacturer(void){ 6397 return hci_stack->manufacturer; 6398 } 6399 6400 #ifdef ENABLE_BLE 6401 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6402 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6403 if (!hci_con) return NULL; 6404 return &hci_con->sm_connection; 6405 } 6406 6407 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6408 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6409 #endif 6410 6411 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6412 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6413 if (hci_connection == NULL) return 0; 6414 if (hci_is_le_connection(hci_connection)){ 6415 #ifdef ENABLE_BLE 6416 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6417 if (sm_conn->sm_connection_encrypted) { 6418 return sm_conn->sm_actual_encryption_key_size; 6419 } 6420 #endif 6421 } else { 6422 #ifdef ENABLE_CLASSIC 6423 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 6424 return hci_connection->encryption_key_size; 6425 } 6426 #endif 6427 } 6428 return 0; 6429 } 6430 6431 int gap_authenticated(hci_con_handle_t con_handle){ 6432 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6433 if (hci_connection == NULL) return 0; 6434 6435 switch (hci_connection->address_type){ 6436 #ifdef ENABLE_BLE 6437 case BD_ADDR_TYPE_LE_PUBLIC: 6438 case BD_ADDR_TYPE_LE_RANDOM: 6439 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6440 return hci_connection->sm_connection.sm_connection_authenticated; 6441 #endif 6442 #ifdef ENABLE_CLASSIC 6443 case BD_ADDR_TYPE_SCO: 6444 case BD_ADDR_TYPE_ACL: 6445 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6446 #endif 6447 default: 6448 return 0; 6449 } 6450 } 6451 6452 int gap_secure_connection(hci_con_handle_t con_handle){ 6453 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6454 if (hci_connection == NULL) return 0; 6455 6456 switch (hci_connection->address_type){ 6457 #ifdef ENABLE_BLE 6458 case BD_ADDR_TYPE_LE_PUBLIC: 6459 case BD_ADDR_TYPE_LE_RANDOM: 6460 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6461 return hci_connection->sm_connection.sm_connection_sc; 6462 #endif 6463 #ifdef ENABLE_CLASSIC 6464 case BD_ADDR_TYPE_SCO: 6465 case BD_ADDR_TYPE_ACL: 6466 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6467 #endif 6468 default: 6469 return 0; 6470 } 6471 } 6472 6473 bool gap_bonded(hci_con_handle_t con_handle){ 6474 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6475 if (hci_connection == NULL) return 0; 6476 6477 #ifdef ENABLE_CLASSIC 6478 link_key_t link_key; 6479 link_key_type_t link_key_type; 6480 #endif 6481 switch (hci_connection->address_type){ 6482 #ifdef ENABLE_BLE 6483 case BD_ADDR_TYPE_LE_PUBLIC: 6484 case BD_ADDR_TYPE_LE_RANDOM: 6485 return hci_connection->sm_connection.sm_le_db_index >= 0; 6486 #endif 6487 #ifdef ENABLE_CLASSIC 6488 case BD_ADDR_TYPE_SCO: 6489 case BD_ADDR_TYPE_ACL: 6490 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6491 #endif 6492 default: 6493 return false; 6494 } 6495 } 6496 6497 #ifdef ENABLE_BLE 6498 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6499 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6500 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6501 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6502 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6503 return sm_conn->sm_connection_authorization_state; 6504 } 6505 #endif 6506 6507 #ifdef ENABLE_CLASSIC 6508 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){ 6509 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6510 if (!conn) return GAP_CONNECTION_INVALID; 6511 conn->sniff_min_interval = sniff_min_interval; 6512 conn->sniff_max_interval = sniff_max_interval; 6513 conn->sniff_attempt = sniff_attempt; 6514 conn->sniff_timeout = sniff_timeout; 6515 hci_run(); 6516 return 0; 6517 } 6518 6519 /** 6520 * @brief Exit Sniff mode 6521 * @param con_handle 6522 @ @return 0 if ok 6523 */ 6524 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6525 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6526 if (!conn) return GAP_CONNECTION_INVALID; 6527 conn->sniff_min_interval = 0xffff; 6528 hci_run(); 6529 return 0; 6530 } 6531 6532 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){ 6533 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6534 if (!conn) return GAP_CONNECTION_INVALID; 6535 conn->sniff_subrating_max_latency = max_latency; 6536 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6537 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6538 hci_run(); 6539 return ERROR_CODE_SUCCESS; 6540 } 6541 6542 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){ 6543 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6544 if (!conn) return GAP_CONNECTION_INVALID; 6545 conn->qos_service_type = service_type; 6546 conn->qos_token_rate = token_rate; 6547 conn->qos_peak_bandwidth = peak_bandwidth; 6548 conn->qos_latency = latency; 6549 conn->qos_delay_variation = delay_variation; 6550 hci_run(); 6551 return ERROR_CODE_SUCCESS; 6552 } 6553 6554 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6555 hci_stack->new_page_scan_interval = page_scan_interval; 6556 hci_stack->new_page_scan_window = page_scan_window; 6557 hci_run(); 6558 } 6559 6560 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6561 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6562 hci_run(); 6563 } 6564 6565 #endif 6566 6567 void hci_halting_defer(void){ 6568 if (hci_stack->state != HCI_STATE_HALTING) return; 6569 switch (hci_stack->substate){ 6570 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6571 case HCI_HALTING_CLOSE: 6572 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6573 break; 6574 default: 6575 break; 6576 } 6577 } 6578 6579 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6580 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6581 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6582 if (le_device_db_index >= le_device_db_max_count()) return; 6583 uint8_t offset = le_device_db_index >> 3; 6584 uint8_t mask = 1 << (le_device_db_index & 7); 6585 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6586 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6587 // note: go back to remove entries, otherwise, a remove + add will skip the add 6588 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6589 } 6590 } 6591 6592 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6593 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6594 if (le_device_db_index >= le_device_db_max_count()) return; 6595 uint8_t offset = le_device_db_index >> 3; 6596 uint8_t mask = 1 << (le_device_db_index & 7); 6597 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6598 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6599 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6600 } 6601 } 6602 6603 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6604 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6605 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6606 } 6607 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6608 // restart le resolving list update 6609 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6610 } 6611 return ERROR_CODE_SUCCESS; 6612 } 6613 #endif 6614 6615 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6616 void hci_setup_test_connections_fuzz(void){ 6617 hci_connection_t * conn; 6618 6619 // default address: 66:55:44:33:00:01 6620 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6621 6622 // setup Controller info 6623 hci_stack->num_cmd_packets = 255; 6624 hci_stack->acl_packets_total_num = 255; 6625 6626 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6627 addr[5] = 0x01; 6628 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6629 conn->con_handle = addr[5]; 6630 conn->role = HCI_ROLE_SLAVE; 6631 conn->state = RECEIVED_CONNECTION_REQUEST; 6632 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6633 6634 // setup incoming Classic SCO connection with con handle 0x0002 6635 addr[5] = 0x02; 6636 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6637 conn->con_handle = addr[5]; 6638 conn->role = HCI_ROLE_SLAVE; 6639 conn->state = RECEIVED_CONNECTION_REQUEST; 6640 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6641 6642 // setup ready Classic ACL connection with con handle 0x0003 6643 addr[5] = 0x03; 6644 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6645 conn->con_handle = addr[5]; 6646 conn->role = HCI_ROLE_SLAVE; 6647 conn->state = OPEN; 6648 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6649 6650 // setup ready Classic SCO connection with con handle 0x0004 6651 addr[5] = 0x04; 6652 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6653 conn->con_handle = addr[5]; 6654 conn->role = HCI_ROLE_SLAVE; 6655 conn->state = OPEN; 6656 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6657 6658 // setup ready LE ACL connection with con handle 0x005 and public address 6659 addr[5] = 0x05; 6660 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6661 conn->con_handle = addr[5]; 6662 conn->role = HCI_ROLE_SLAVE; 6663 conn->state = OPEN; 6664 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6665 conn->sm_connection.sm_connection_encrypted = 1; 6666 } 6667 6668 void hci_free_connections_fuzz(void){ 6669 btstack_linked_list_iterator_t it; 6670 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6671 while (btstack_linked_list_iterator_has_next(&it)){ 6672 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6673 btstack_linked_list_iterator_remove(&it); 6674 btstack_memory_hci_connection_free(con); 6675 } 6676 } 6677 void hci_simulate_working_fuzz(void){ 6678 hci_init_done(); 6679 hci_stack->num_cmd_packets = 255; 6680 } 6681 #endif 6682