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 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 218 btstack_run_loop_set_timer_context(&conn->timeout, conn); 219 hci_connection_timestamp(conn); 220 #endif 221 conn->acl_recombination_length = 0; 222 conn->acl_recombination_pos = 0; 223 conn->num_packets_sent = 0; 224 225 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 226 #ifdef ENABLE_BLE 227 conn->le_phy_update_all_phys = 0xff; 228 #endif 229 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 230 conn->le_max_tx_octets = 27; 231 #endif 232 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 233 return conn; 234 } 235 236 237 /** 238 * get le connection parameter range 239 * 240 * @return le connection parameter range struct 241 */ 242 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 243 *range = hci_stack->le_connection_parameter_range; 244 } 245 246 /** 247 * set le connection parameter range 248 * 249 */ 250 251 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 252 hci_stack->le_connection_parameter_range = *range; 253 } 254 255 /** 256 * @brief Test if connection parameters are inside in existing rage 257 * @param conn_interval_min (unit: 1.25ms) 258 * @param conn_interval_max (unit: 1.25ms) 259 * @param conn_latency 260 * @param supervision_timeout (unit: 10ms) 261 * @returns 1 if included 262 */ 263 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){ 264 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 265 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 266 267 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 268 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 269 270 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 271 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 272 273 return 1; 274 } 275 276 /** 277 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 278 * @note: default: 1 279 * @param max_peripheral_connections 280 */ 281 #ifdef ENABLE_LE_PERIPHERAL 282 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 283 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 284 } 285 #endif 286 287 /** 288 * get hci connections iterator 289 * 290 * @return hci connections iterator 291 */ 292 293 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 294 btstack_linked_list_iterator_init(it, &hci_stack->connections); 295 } 296 297 /** 298 * get connection for a given handle 299 * 300 * @return connection OR NULL, if not found 301 */ 302 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 303 btstack_linked_list_iterator_t it; 304 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 305 while (btstack_linked_list_iterator_has_next(&it)){ 306 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 307 if ( item->con_handle == con_handle ) { 308 return item; 309 } 310 } 311 return NULL; 312 } 313 314 /** 315 * get connection for given address 316 * 317 * @return connection OR NULL, if not found 318 */ 319 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 320 btstack_linked_list_iterator_t it; 321 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 322 while (btstack_linked_list_iterator_has_next(&it)){ 323 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 324 if (connection->address_type != addr_type) continue; 325 if (memcmp(addr, connection->address, 6) != 0) continue; 326 return connection; 327 } 328 return NULL; 329 } 330 331 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 332 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 333 } 334 335 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 336 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 337 } 338 339 #ifdef ENABLE_CLASSIC 340 341 #ifdef ENABLE_SCO_OVER_HCI 342 static int hci_number_sco_connections(void){ 343 int connections = 0; 344 btstack_linked_list_iterator_t it; 345 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 346 while (btstack_linked_list_iterator_has_next(&it)){ 347 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 348 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 349 connections++; 350 } 351 return connections; 352 } 353 #endif 354 355 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 356 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 357 #ifdef HAVE_EMBEDDED_TICK 358 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 359 // connections might be timed out 360 hci_emit_l2cap_check_timeout(connection); 361 } 362 #else 363 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 364 // connections might be timed out 365 hci_emit_l2cap_check_timeout(connection); 366 } 367 #endif 368 } 369 370 static void hci_connection_timestamp(hci_connection_t *connection){ 371 #ifdef HAVE_EMBEDDED_TICK 372 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 373 #else 374 connection->timestamp = btstack_run_loop_get_time_ms(); 375 #endif 376 } 377 378 /** 379 * add authentication flags and reset timer 380 * @note: assumes classic connection 381 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 382 */ 383 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 384 bd_addr_t addr; 385 reverse_bd_addr(bd_addr, addr); 386 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 387 if (conn) { 388 connectionSetAuthenticationFlags(conn, flags); 389 hci_connection_timestamp(conn); 390 } 391 } 392 393 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 394 hci_connection_t * conn = hci_connection_for_handle(handle); 395 if (!conn) return 0; 396 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 397 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 398 return 0; 399 } 400 401 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 402 if (!hci_stack->link_key_db) return; 403 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 404 hci_stack->link_key_db->delete_link_key(addr); 405 } 406 407 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 408 if (!hci_stack->link_key_db) return; 409 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 410 hci_stack->link_key_db->put_link_key(addr, link_key, type); 411 } 412 413 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 414 if (!hci_stack->link_key_db) return false; 415 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 416 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 417 return result; 418 } 419 420 void gap_delete_all_link_keys(void){ 421 bd_addr_t addr; 422 link_key_t link_key; 423 link_key_type_t type; 424 btstack_link_key_iterator_t it; 425 int ok = gap_link_key_iterator_init(&it); 426 if (!ok) { 427 log_error("could not initialize iterator"); 428 return; 429 } 430 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 431 gap_drop_link_key_for_bd_addr(addr); 432 } 433 gap_link_key_iterator_done(&it); 434 } 435 436 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 437 if (!hci_stack->link_key_db) return 0; 438 if (!hci_stack->link_key_db->iterator_init) return 0; 439 return hci_stack->link_key_db->iterator_init(it); 440 } 441 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){ 442 if (!hci_stack->link_key_db) return 0; 443 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 444 } 445 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 446 if (!hci_stack->link_key_db) return; 447 hci_stack->link_key_db->iterator_done(it); 448 } 449 #endif 450 451 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 452 switch (address_type){ 453 case BD_ADDR_TYPE_LE_PUBLIC: 454 case BD_ADDR_TYPE_LE_RANDOM: 455 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 456 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 457 return true; 458 default: 459 return false; 460 } 461 } 462 463 static int hci_is_le_connection(hci_connection_t * connection){ 464 return hci_is_le_connection_type(connection->address_type); 465 } 466 467 /** 468 * count connections 469 */ 470 static int nr_hci_connections(void){ 471 int count = 0; 472 btstack_linked_item_t *it; 473 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 474 count++; 475 } 476 return count; 477 } 478 479 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 480 481 unsigned int num_packets_sent_classic = 0; 482 unsigned int num_packets_sent_le = 0; 483 484 btstack_linked_item_t *it; 485 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 486 hci_connection_t * connection = (hci_connection_t *) it; 487 if (hci_is_le_connection(connection)){ 488 num_packets_sent_le += connection->num_packets_sent; 489 } 490 if (connection->address_type == BD_ADDR_TYPE_ACL){ 491 num_packets_sent_classic += connection->num_packets_sent; 492 } 493 } 494 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 495 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 496 int free_slots_le = 0; 497 498 if (free_slots_classic < 0){ 499 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); 500 return 0; 501 } 502 503 if (hci_stack->le_acl_packets_total_num){ 504 // if we have LE slots, they are used 505 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 506 if (free_slots_le < 0){ 507 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); 508 return 0; 509 } 510 } else { 511 // otherwise, classic slots are used for LE, too 512 free_slots_classic -= num_packets_sent_le; 513 if (free_slots_classic < 0){ 514 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); 515 return 0; 516 } 517 } 518 519 switch (address_type){ 520 case BD_ADDR_TYPE_UNKNOWN: 521 log_error("hci_number_free_acl_slots: unknown address type"); 522 return 0; 523 524 case BD_ADDR_TYPE_ACL: 525 return free_slots_classic; 526 527 default: 528 if (hci_stack->le_acl_packets_total_num){ 529 return free_slots_le; 530 } 531 return free_slots_classic; 532 } 533 } 534 535 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 536 // get connection type 537 hci_connection_t * connection = hci_connection_for_handle(con_handle); 538 if (!connection){ 539 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 540 return 0; 541 } 542 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 543 } 544 545 #ifdef ENABLE_CLASSIC 546 static int hci_number_free_sco_slots(void){ 547 unsigned int num_sco_packets_sent = 0; 548 btstack_linked_item_t *it; 549 if (hci_stack->synchronous_flow_control_enabled){ 550 // explicit flow control 551 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 552 hci_connection_t * connection = (hci_connection_t *) it; 553 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 554 num_sco_packets_sent += connection->num_packets_sent; 555 } 556 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 557 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 558 return 0; 559 } 560 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 561 } else { 562 // implicit flow control -- TODO 563 int num_ready = 0; 564 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 565 hci_connection_t * connection = (hci_connection_t *) it; 566 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 567 if (connection->sco_tx_ready == 0) continue; 568 num_ready++; 569 } 570 return num_ready; 571 } 572 } 573 #endif 574 575 // only used to send HCI Host Number Completed Packets 576 static int hci_can_send_comand_packet_transport(void){ 577 if (hci_stack->hci_packet_buffer_reserved) return 0; 578 579 // check for async hci transport implementations 580 if (hci_stack->hci_transport->can_send_packet_now){ 581 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 582 return 0; 583 } 584 } 585 return 1; 586 } 587 588 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 589 int hci_can_send_command_packet_now(void){ 590 if (hci_can_send_comand_packet_transport() == 0) return 0; 591 return hci_stack->num_cmd_packets > 0u; 592 } 593 594 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 595 // check for async hci transport implementations 596 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 597 return hci_stack->hci_transport->can_send_packet_now(packet_type); 598 } 599 600 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 601 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 602 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 603 } 604 605 int hci_can_send_acl_le_packet_now(void){ 606 if (hci_stack->hci_packet_buffer_reserved) return 0; 607 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 608 } 609 610 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 611 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 612 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 613 } 614 615 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 616 if (hci_stack->hci_packet_buffer_reserved) return 0; 617 return hci_can_send_prepared_acl_packet_now(con_handle); 618 } 619 620 #ifdef ENABLE_CLASSIC 621 int hci_can_send_acl_classic_packet_now(void){ 622 if (hci_stack->hci_packet_buffer_reserved) return 0; 623 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 624 } 625 626 int hci_can_send_prepared_sco_packet_now(void){ 627 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 628 if (hci_have_usb_transport()){ 629 return hci_stack->sco_can_send_now; 630 } else { 631 return hci_number_free_sco_slots() > 0; 632 } 633 } 634 635 int hci_can_send_sco_packet_now(void){ 636 if (hci_stack->hci_packet_buffer_reserved) return 0; 637 return hci_can_send_prepared_sco_packet_now(); 638 } 639 640 void hci_request_sco_can_send_now_event(void){ 641 hci_stack->sco_waiting_for_can_send_now = 1; 642 hci_notify_if_sco_can_send_now(); 643 } 644 #endif 645 646 // used for internal checks in l2cap.c 647 int hci_is_packet_buffer_reserved(void){ 648 return hci_stack->hci_packet_buffer_reserved; 649 } 650 651 // reserves outgoing packet buffer. @returns 1 if successful 652 int hci_reserve_packet_buffer(void){ 653 if (hci_stack->hci_packet_buffer_reserved) { 654 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 655 return 0; 656 } 657 hci_stack->hci_packet_buffer_reserved = 1; 658 return 1; 659 } 660 661 void hci_release_packet_buffer(void){ 662 hci_stack->hci_packet_buffer_reserved = 0; 663 } 664 665 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 666 static int hci_transport_synchronous(void){ 667 return hci_stack->hci_transport->can_send_packet_now == NULL; 668 } 669 670 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 671 672 // 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); 673 674 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 675 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 676 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 677 max_acl_data_packet_length = hci_stack->le_data_packets_length; 678 } 679 680 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 681 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 682 max_acl_data_packet_length = connection->le_max_tx_octets; 683 } 684 #endif 685 686 log_debug("hci_send_acl_packet_fragments entered"); 687 688 int err; 689 // multiple packets could be send on a synchronous HCI transport 690 while (true){ 691 692 log_debug("hci_send_acl_packet_fragments loop entered"); 693 694 // get current data 695 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 696 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 697 bool more_fragments = false; 698 699 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 700 if (current_acl_data_packet_length > max_acl_data_packet_length){ 701 more_fragments = true; 702 current_acl_data_packet_length = max_acl_data_packet_length; 703 } 704 705 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 706 if (acl_header_pos > 0u){ 707 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 708 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 709 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 710 } 711 712 // update header len 713 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 714 715 // count packet 716 connection->num_packets_sent++; 717 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 718 719 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 720 if (more_fragments){ 721 // update start of next fragment to send 722 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 723 } else { 724 // done 725 hci_stack->acl_fragmentation_pos = 0; 726 hci_stack->acl_fragmentation_total_size = 0; 727 } 728 729 // send packet 730 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 731 const int size = current_acl_data_packet_length + 4; 732 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 733 hci_stack->acl_fragmentation_tx_active = 1; 734 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 735 736 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 737 738 // done yet? 739 if (!more_fragments) break; 740 741 // can send more? 742 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 743 } 744 745 log_debug("hci_send_acl_packet_fragments loop over"); 746 747 // release buffer now for synchronous transport 748 if (hci_transport_synchronous()){ 749 hci_stack->acl_fragmentation_tx_active = 0; 750 hci_release_packet_buffer(); 751 hci_emit_transport_packet_sent(); 752 } 753 754 return err; 755 } 756 757 // pre: caller has reserved the packet buffer 758 int hci_send_acl_packet_buffer(int size){ 759 760 // log_info("hci_send_acl_packet_buffer size %u", size); 761 762 if (!hci_stack->hci_packet_buffer_reserved) { 763 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 764 return 0; 765 } 766 767 uint8_t * packet = hci_stack->hci_packet_buffer; 768 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 769 770 // check for free places on Bluetooth module 771 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 772 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 773 hci_release_packet_buffer(); 774 hci_emit_transport_packet_sent(); 775 return BTSTACK_ACL_BUFFERS_FULL; 776 } 777 778 hci_connection_t *connection = hci_connection_for_handle( con_handle); 779 if (!connection) { 780 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 781 hci_release_packet_buffer(); 782 hci_emit_transport_packet_sent(); 783 return 0; 784 } 785 786 #ifdef ENABLE_CLASSIC 787 hci_connection_timestamp(connection); 788 #endif 789 790 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 791 792 // setup data 793 hci_stack->acl_fragmentation_total_size = size; 794 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 795 796 return hci_send_acl_packet_fragments(connection); 797 } 798 799 #ifdef ENABLE_CLASSIC 800 // pre: caller has reserved the packet buffer 801 int hci_send_sco_packet_buffer(int size){ 802 803 // log_info("hci_send_acl_packet_buffer size %u", size); 804 805 if (!hci_stack->hci_packet_buffer_reserved) { 806 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 807 return 0; 808 } 809 810 uint8_t * packet = hci_stack->hci_packet_buffer; 811 812 // skip checks in loopback mode 813 if (!hci_stack->loopback_mode){ 814 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 815 816 // check for free places on Bluetooth module 817 if (!hci_can_send_prepared_sco_packet_now()) { 818 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 819 hci_release_packet_buffer(); 820 hci_emit_transport_packet_sent(); 821 return BTSTACK_ACL_BUFFERS_FULL; 822 } 823 824 // track send packet in connection struct 825 hci_connection_t *connection = hci_connection_for_handle( con_handle); 826 if (!connection) { 827 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 828 hci_release_packet_buffer(); 829 hci_emit_transport_packet_sent(); 830 return 0; 831 } 832 833 if (hci_have_usb_transport()){ 834 // token used 835 hci_stack->sco_can_send_now = 0; 836 } else { 837 if (hci_stack->synchronous_flow_control_enabled){ 838 connection->num_packets_sent++; 839 } else { 840 connection->sco_tx_ready--; 841 } 842 } 843 } 844 845 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 846 847 #ifdef HAVE_SCO_TRANSPORT 848 hci_stack->sco_transport->send_packet(packet, size); 849 hci_release_packet_buffer(); 850 hci_emit_transport_packet_sent(); 851 852 return 0; 853 #else 854 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 855 if (hci_transport_synchronous()){ 856 hci_release_packet_buffer(); 857 hci_emit_transport_packet_sent(); 858 } 859 860 return err; 861 #endif 862 } 863 #endif 864 865 static void acl_handler(uint8_t *packet, uint16_t size){ 866 867 // get info 868 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 869 hci_connection_t *conn = hci_connection_for_handle(con_handle); 870 uint8_t acl_flags = READ_ACL_FLAGS(packet); 871 uint16_t acl_length = READ_ACL_LENGTH(packet); 872 873 // ignore non-registered handle 874 if (!conn){ 875 log_error("acl_handler called with non-registered handle %u!" , con_handle); 876 return; 877 } 878 879 // assert packet is complete 880 if ((acl_length + 4u) != size){ 881 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 882 return; 883 } 884 885 #ifdef ENABLE_CLASSIC 886 // update idle timestamp 887 hci_connection_timestamp(conn); 888 #endif 889 890 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 891 hci_stack->host_completed_packets = 1; 892 conn->num_packets_completed++; 893 #endif 894 895 // handle different packet types 896 switch (acl_flags & 0x03u) { 897 898 case 0x01: // continuation fragment 899 900 // sanity checks 901 if (conn->acl_recombination_pos == 0u) { 902 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 903 return; 904 } 905 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 906 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 907 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 908 conn->acl_recombination_pos = 0; 909 return; 910 } 911 912 // append fragment payload (header already stored) 913 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 914 &packet[4], acl_length); 915 conn->acl_recombination_pos += acl_length; 916 917 // forward complete L2CAP packet if complete. 918 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 919 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 920 // reset recombination buffer 921 conn->acl_recombination_length = 0; 922 conn->acl_recombination_pos = 0; 923 } 924 break; 925 926 case 0x02: { // first fragment 927 928 // sanity check 929 if (conn->acl_recombination_pos) { 930 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 931 conn->acl_recombination_pos = 0; 932 } 933 934 // peek into L2CAP packet! 935 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 936 937 // compare fragment size to L2CAP packet size 938 if (acl_length >= (l2cap_length + 4u)){ 939 // forward fragment as L2CAP packet 940 hci_emit_acl_packet(packet, acl_length + 4u); 941 } else { 942 943 if (acl_length > HCI_ACL_BUFFER_SIZE){ 944 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 945 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 946 return; 947 } 948 949 // store first fragment and tweak acl length for complete package 950 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 951 packet, acl_length + 4u); 952 conn->acl_recombination_pos = acl_length + 4u; 953 conn->acl_recombination_length = l2cap_length; 954 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 955 } 956 break; 957 958 } 959 default: 960 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 961 return; 962 } 963 964 // execute main loop 965 hci_run(); 966 } 967 968 static void hci_shutdown_connection(hci_connection_t *conn){ 969 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 970 971 #ifdef ENABLE_CLASSIC 972 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 973 bd_addr_type_t addr_type = conn->address_type; 974 #endif 975 #ifdef HAVE_SCO_TRANSPORT 976 hci_con_handle_t con_handle = conn->con_handle; 977 #endif 978 #endif 979 980 btstack_run_loop_remove_timer(&conn->timeout); 981 982 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 983 btstack_memory_hci_connection_free( conn ); 984 985 // now it's gone 986 hci_emit_nr_connections_changed(); 987 988 #ifdef ENABLE_CLASSIC 989 #ifdef ENABLE_SCO_OVER_HCI 990 // update SCO 991 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 992 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 993 } 994 #endif 995 #ifdef HAVE_SCO_TRANSPORT 996 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 997 hci_stack->sco_transport->close(con_handle); 998 } 999 #endif 1000 #endif 1001 } 1002 1003 #ifdef ENABLE_CLASSIC 1004 1005 static const uint16_t packet_type_sizes[] = { 1006 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1007 HCI_ACL_DH1_SIZE, 0, 0, 0, 1008 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1009 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1010 }; 1011 static const uint8_t packet_type_feature_requirement_bit[] = { 1012 0, // 3 slot packets 1013 1, // 5 slot packets 1014 25, // EDR 2 mpbs 1015 26, // EDR 3 mbps 1016 39, // 3 slot EDR packts 1017 40, // 5 slot EDR packet 1018 }; 1019 static const uint16_t packet_type_feature_packet_mask[] = { 1020 0x0f00, // 3 slot packets 1021 0xf000, // 5 slot packets 1022 0x1102, // EDR 2 mpbs 1023 0x2204, // EDR 3 mbps 1024 0x0300, // 3 slot EDR packts 1025 0x3000, // 5 slot EDR packet 1026 }; 1027 1028 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1029 // enable packet types based on size 1030 uint16_t packet_types = 0; 1031 unsigned int i; 1032 for (i=0;i<16;i++){ 1033 if (packet_type_sizes[i] == 0) continue; 1034 if (packet_type_sizes[i] <= buffer_size){ 1035 packet_types |= 1 << i; 1036 } 1037 } 1038 // disable packet types due to missing local supported features 1039 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1040 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1041 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1042 if (feature_set) continue; 1043 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1044 packet_types &= ~packet_type_feature_packet_mask[i]; 1045 } 1046 // flip bits for "may not be used" 1047 packet_types ^= 0x3306; 1048 return packet_types; 1049 } 1050 1051 uint16_t hci_usable_acl_packet_types(void){ 1052 return hci_stack->packet_types; 1053 } 1054 #endif 1055 1056 uint8_t* hci_get_outgoing_packet_buffer(void){ 1057 // hci packet buffer is >= acl data packet length 1058 return hci_stack->hci_packet_buffer; 1059 } 1060 1061 uint16_t hci_max_acl_data_packet_length(void){ 1062 return hci_stack->acl_data_packet_length; 1063 } 1064 1065 #ifdef ENABLE_CLASSIC 1066 int hci_extended_sco_link_supported(void){ 1067 // No. 31, byte 3, bit 7 1068 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1069 } 1070 #endif 1071 1072 int hci_non_flushable_packet_boundary_flag_supported(void){ 1073 // No. 54, byte 6, bit 6 1074 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1075 } 1076 1077 static int gap_ssp_supported(void){ 1078 // No. 51, byte 6, bit 3 1079 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1080 } 1081 1082 static int hci_classic_supported(void){ 1083 #ifdef ENABLE_CLASSIC 1084 // No. 37, byte 4, bit 5, = No BR/EDR Support 1085 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1086 #else 1087 return 0; 1088 #endif 1089 } 1090 1091 static int hci_le_supported(void){ 1092 #ifdef ENABLE_BLE 1093 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1094 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1095 #else 1096 return 0; 1097 #endif 1098 } 1099 1100 #ifdef ENABLE_BLE 1101 1102 /** 1103 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1104 */ 1105 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1106 *addr_type = hci_stack->le_own_addr_type; 1107 if (hci_stack->le_own_addr_type){ 1108 (void)memcpy(addr, hci_stack->le_random_address, 6); 1109 } else { 1110 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1111 } 1112 } 1113 1114 #ifdef ENABLE_LE_CENTRAL 1115 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1116 1117 int offset = 3; 1118 int num_reports = packet[offset]; 1119 offset += 1; 1120 1121 int i; 1122 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1123 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1124 for (i=0; (i<num_reports) && (offset < size);i++){ 1125 // sanity checks on data_length: 1126 uint8_t data_length = packet[offset + 8]; 1127 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1128 if ((offset + 9u + data_length + 1u) > size) return; 1129 // setup event 1130 uint8_t event_size = 10u + data_length; 1131 int pos = 0; 1132 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1133 event[pos++] = event_size; 1134 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1135 offset += 8; 1136 pos += 8; 1137 event[pos++] = packet[offset + 1 + data_length]; // rssi 1138 event[pos++] = data_length; 1139 offset++; 1140 (void)memcpy(&event[pos], &packet[offset], data_length); 1141 pos += data_length; 1142 offset += data_length + 1u; // rssi 1143 hci_emit_event(event, pos, 1); 1144 } 1145 } 1146 #endif 1147 #endif 1148 1149 #ifdef ENABLE_BLE 1150 #ifdef ENABLE_LE_PERIPHERAL 1151 static void hci_update_advertisements_enabled_for_current_roles(void){ 1152 if (hci_stack->le_advertisements_enabled){ 1153 // get number of active le slave connections 1154 int num_slave_connections = 0; 1155 btstack_linked_list_iterator_t it; 1156 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1157 while (btstack_linked_list_iterator_has_next(&it)){ 1158 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1159 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1160 if (con->state != OPEN) continue; 1161 if (con->role != HCI_ROLE_SLAVE) continue; 1162 if (!hci_is_le_connection(con)) continue; 1163 num_slave_connections++; 1164 } 1165 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1166 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1167 } else { 1168 hci_stack->le_advertisements_enabled_for_current_roles = false; 1169 } 1170 } 1171 #endif 1172 #endif 1173 1174 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1175 1176 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1177 if (!hci_stack->config) return 0; 1178 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1179 // Limit baud rate for Broadcom chipsets to 3 mbps 1180 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1181 baud_rate = 3000000; 1182 } 1183 return baud_rate; 1184 } 1185 1186 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1187 UNUSED(ds); 1188 1189 switch (hci_stack->substate){ 1190 case HCI_INIT_W4_SEND_RESET: 1191 log_info("Resend HCI Reset"); 1192 hci_stack->substate = HCI_INIT_SEND_RESET; 1193 hci_stack->num_cmd_packets = 1; 1194 hci_run(); 1195 break; 1196 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1197 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1198 if (hci_stack->hci_transport->reset_link){ 1199 hci_stack->hci_transport->reset_link(); 1200 } 1201 1202 /* fall through */ 1203 1204 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1205 log_info("Resend HCI Reset - CSR Warm Boot"); 1206 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1207 hci_stack->num_cmd_packets = 1; 1208 hci_run(); 1209 break; 1210 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1211 if (hci_stack->hci_transport->set_baudrate){ 1212 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1213 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1214 hci_stack->hci_transport->set_baudrate(baud_rate); 1215 } 1216 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1217 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1218 if (hci_stack->hci_transport->reset_link){ 1219 log_info("Link Reset"); 1220 hci_stack->hci_transport->reset_link(); 1221 } 1222 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1223 hci_run(); 1224 } 1225 break; 1226 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1227 // otherwise continue 1228 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1229 hci_send_cmd(&hci_read_local_supported_commands); 1230 break; 1231 default: 1232 break; 1233 } 1234 } 1235 #endif 1236 1237 static void hci_initializing_next_state(void){ 1238 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1239 } 1240 1241 // assumption: hci_can_send_command_packet_now() == true 1242 static void hci_initializing_run(void){ 1243 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1244 switch (hci_stack->substate){ 1245 case HCI_INIT_SEND_RESET: 1246 hci_state_reset(); 1247 1248 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1249 // prepare reset if command complete not received in 100ms 1250 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1251 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1252 btstack_run_loop_add_timer(&hci_stack->timeout); 1253 #endif 1254 // send command 1255 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1256 hci_send_cmd(&hci_reset); 1257 break; 1258 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1259 hci_send_cmd(&hci_read_local_version_information); 1260 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1261 break; 1262 case HCI_INIT_SEND_READ_LOCAL_NAME: 1263 hci_send_cmd(&hci_read_local_name); 1264 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1265 break; 1266 1267 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1268 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1269 hci_state_reset(); 1270 // prepare reset if command complete not received in 100ms 1271 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1272 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1273 btstack_run_loop_add_timer(&hci_stack->timeout); 1274 // send command 1275 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1276 hci_send_cmd(&hci_reset); 1277 break; 1278 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1279 hci_state_reset(); 1280 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1281 hci_send_cmd(&hci_reset); 1282 break; 1283 case HCI_INIT_SEND_BAUD_CHANGE: { 1284 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1285 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1286 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1287 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1288 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1289 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1290 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1291 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1292 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1293 btstack_run_loop_add_timer(&hci_stack->timeout); 1294 } 1295 break; 1296 } 1297 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1298 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1299 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1300 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1301 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1302 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1303 break; 1304 } 1305 case HCI_INIT_CUSTOM_INIT: 1306 // Custom initialization 1307 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1308 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1309 bool send_cmd = false; 1310 switch (hci_stack->chipset_result){ 1311 case BTSTACK_CHIPSET_VALID_COMMAND: 1312 send_cmd = true; 1313 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1314 break; 1315 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1316 send_cmd = true; 1317 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1318 log_info("CSR Warm Boot"); 1319 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1320 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1321 btstack_run_loop_add_timer(&hci_stack->timeout); 1322 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1323 && hci_stack->config 1324 && hci_stack->chipset 1325 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1326 && hci_stack->hci_transport->set_baudrate 1327 && hci_transport_uart_get_main_baud_rate()){ 1328 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1329 } else { 1330 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1331 } 1332 break; 1333 default: 1334 break; 1335 } 1336 1337 if (send_cmd){ 1338 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1339 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1340 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1341 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1342 break; 1343 } 1344 log_info("Init script done"); 1345 1346 // Init script download on Broadcom chipsets causes: 1347 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1348 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1349 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1350 1351 // - baud rate to reset, restore UART baud rate if needed 1352 int need_baud_change = hci_stack->config 1353 && hci_stack->chipset 1354 && hci_stack->chipset->set_baudrate_command 1355 && hci_stack->hci_transport->set_baudrate 1356 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1357 if (need_baud_change) { 1358 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1359 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1360 hci_stack->hci_transport->set_baudrate(baud_rate); 1361 } 1362 1363 uint16_t bcm_delay_ms = 300; 1364 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1365 // -> Work around: wait here. 1366 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1367 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1368 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1369 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1370 btstack_run_loop_add_timer(&hci_stack->timeout); 1371 break; 1372 } 1373 } 1374 // otherwise continue 1375 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1376 hci_send_cmd(&hci_read_local_supported_commands); 1377 break; 1378 case HCI_INIT_SET_BD_ADDR: 1379 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1380 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1381 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1382 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1383 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1384 break; 1385 #endif 1386 1387 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1388 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1389 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1390 hci_send_cmd(&hci_read_local_supported_commands); 1391 break; 1392 case HCI_INIT_READ_BD_ADDR: 1393 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1394 hci_send_cmd(&hci_read_bd_addr); 1395 break; 1396 case HCI_INIT_READ_BUFFER_SIZE: 1397 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1398 hci_send_cmd(&hci_read_buffer_size); 1399 break; 1400 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1401 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1402 hci_send_cmd(&hci_read_local_supported_features); 1403 break; 1404 1405 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1406 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1407 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1408 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1409 break; 1410 case HCI_INIT_HOST_BUFFER_SIZE: 1411 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1412 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1413 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1414 break; 1415 #endif 1416 1417 case HCI_INIT_SET_EVENT_MASK: 1418 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1419 if (hci_le_supported()){ 1420 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1421 } else { 1422 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1423 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1424 } 1425 break; 1426 1427 #ifdef ENABLE_CLASSIC 1428 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1429 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1430 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1431 break; 1432 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1433 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1434 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1435 break; 1436 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1437 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1438 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1439 break; 1440 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1441 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1442 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1443 break; 1444 case HCI_INIT_WRITE_LOCAL_NAME: { 1445 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1446 hci_reserve_packet_buffer(); 1447 uint8_t * packet = hci_stack->hci_packet_buffer; 1448 // construct HCI Command and send 1449 uint16_t opcode = hci_write_local_name.opcode; 1450 hci_stack->last_cmd_opcode = opcode; 1451 packet[0] = opcode & 0xff; 1452 packet[1] = opcode >> 8; 1453 packet[2] = DEVICE_NAME_LEN; 1454 memset(&packet[3], 0, DEVICE_NAME_LEN); 1455 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1456 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1457 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1458 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1459 // expand '00:00:00:00:00:00' in name with bd_addr 1460 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1461 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1462 break; 1463 } 1464 case HCI_INIT_WRITE_EIR_DATA: { 1465 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1466 hci_reserve_packet_buffer(); 1467 uint8_t * packet = hci_stack->hci_packet_buffer; 1468 // construct HCI Command in-place and send 1469 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1470 hci_stack->last_cmd_opcode = opcode; 1471 uint16_t offset = 0; 1472 packet[offset++] = opcode & 0xff; 1473 packet[offset++] = opcode >> 8; 1474 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1475 packet[offset++] = 0; // FEC not required 1476 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1477 if (hci_stack->eir_data){ 1478 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1479 ad_context_t context; 1480 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1481 uint8_t data_type = ad_iterator_get_data_type(&context); 1482 uint8_t size = ad_iterator_get_data_len(&context); 1483 const uint8_t *data = ad_iterator_get_data(&context); 1484 // copy item 1485 packet[offset++] = size + 1; 1486 packet[offset++] = data_type; 1487 memcpy(&packet[offset], data, size); 1488 // update name item 1489 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1490 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1491 } 1492 offset += size; 1493 } 1494 } else { 1495 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1496 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1497 packet[offset++] = bytes_to_copy + 1; 1498 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1499 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1500 // expand '00:00:00:00:00:00' in name with bd_addr 1501 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1502 } 1503 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1504 break; 1505 } 1506 case HCI_INIT_WRITE_INQUIRY_MODE: 1507 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1508 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1509 break; 1510 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1511 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1512 hci_stack->secure_connections_active = true; 1513 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1514 break; 1515 case HCI_INIT_WRITE_SCAN_ENABLE: 1516 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1517 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1518 break; 1519 // only sent if ENABLE_SCO_OVER_HCI is defined 1520 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1521 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1522 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1523 break; 1524 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1525 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1526 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1527 break; 1528 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1529 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1530 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1531 #ifdef ENABLE_SCO_OVER_HCI 1532 log_info("BCM: Route SCO data via HCI transport"); 1533 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1534 #endif 1535 #ifdef ENABLE_SCO_OVER_PCM 1536 log_info("BCM: Route SCO data via PCM interface"); 1537 #ifdef ENABLE_BCM_PCM_WBS 1538 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1539 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1540 #else 1541 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1542 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1543 #endif 1544 #endif 1545 break; 1546 #ifdef ENABLE_SCO_OVER_PCM 1547 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1548 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1549 log_info("BCM: Config PCM interface for I2S"); 1550 #ifdef ENABLE_BCM_PCM_WBS 1551 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1552 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1553 #else 1554 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1555 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1556 #endif 1557 break; 1558 #endif 1559 #endif 1560 1561 #ifdef ENABLE_BLE 1562 // LE INIT 1563 case HCI_INIT_LE_READ_BUFFER_SIZE: 1564 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1565 hci_send_cmd(&hci_le_read_buffer_size); 1566 break; 1567 case HCI_INIT_LE_SET_EVENT_MASK: 1568 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1569 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1570 break; 1571 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1572 // LE Supported Host = 1, Simultaneous Host = 0 1573 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1574 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1575 break; 1576 #endif 1577 1578 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1579 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1580 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1581 hci_send_cmd(&hci_le_read_maximum_data_length); 1582 break; 1583 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1584 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1585 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1586 break; 1587 #endif 1588 1589 #ifdef ENABLE_LE_CENTRAL 1590 case HCI_INIT_READ_WHITE_LIST_SIZE: 1591 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1592 hci_send_cmd(&hci_le_read_white_list_size); 1593 break; 1594 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1595 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1596 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); 1597 break; 1598 #endif 1599 default: 1600 return; 1601 } 1602 } 1603 1604 static void hci_init_done(void){ 1605 // done. tell the app 1606 log_info("hci_init_done -> HCI_STATE_WORKING"); 1607 hci_stack->state = HCI_STATE_WORKING; 1608 hci_emit_state(); 1609 hci_run(); 1610 } 1611 1612 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1613 bool command_completed = false; 1614 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1615 uint16_t opcode = little_endian_read_16(packet,3); 1616 if (opcode == hci_stack->last_cmd_opcode){ 1617 command_completed = true; 1618 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1619 } else { 1620 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1621 } 1622 } 1623 1624 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1625 uint8_t status = packet[2]; 1626 uint16_t opcode = little_endian_read_16(packet,4); 1627 if (opcode == hci_stack->last_cmd_opcode){ 1628 if (status){ 1629 command_completed = true; 1630 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1631 } else { 1632 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1633 } 1634 } else { 1635 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1636 } 1637 } 1638 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1639 // Vendor == CSR 1640 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1641 // TODO: track actual command 1642 command_completed = true; 1643 } 1644 1645 // Vendor == Toshiba 1646 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1647 // TODO: track actual command 1648 command_completed = true; 1649 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1650 hci_stack->num_cmd_packets = 1; 1651 } 1652 #endif 1653 1654 return command_completed; 1655 } 1656 1657 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1658 1659 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1660 1661 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1662 1663 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1664 1665 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1666 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1667 // 1668 // HCI Reset 1669 // Timeout 100 ms 1670 // HCI Reset 1671 // Command Complete Reset 1672 // HCI Read Local Version Information 1673 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1674 // hang... 1675 // 1676 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1677 if (!command_completed 1678 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1679 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1680 1681 uint16_t opcode = little_endian_read_16(packet,3); 1682 if (opcode == hci_reset.opcode){ 1683 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1684 return; 1685 } 1686 } 1687 1688 // CSR & H5 1689 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1690 if (!command_completed 1691 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1692 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1693 1694 uint16_t opcode = little_endian_read_16(packet,3); 1695 if (opcode == hci_reset.opcode){ 1696 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1697 return; 1698 } 1699 } 1700 1701 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1702 // fix: Correct substate and behave as command below 1703 if (command_completed){ 1704 switch (hci_stack->substate){ 1705 case HCI_INIT_SEND_RESET: 1706 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1707 break; 1708 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1709 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1710 break; 1711 default: 1712 break; 1713 } 1714 } 1715 1716 #endif 1717 1718 if (!command_completed) return; 1719 1720 bool need_baud_change = false; 1721 bool need_addr_change = false; 1722 1723 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1724 need_baud_change = hci_stack->config 1725 && hci_stack->chipset 1726 && hci_stack->chipset->set_baudrate_command 1727 && hci_stack->hci_transport->set_baudrate 1728 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1729 1730 need_addr_change = hci_stack->custom_bd_addr_set 1731 && hci_stack->chipset 1732 && hci_stack->chipset->set_bd_addr_command; 1733 #endif 1734 1735 switch(hci_stack->substate){ 1736 1737 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1738 case HCI_INIT_SEND_RESET: 1739 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1740 // fix: just correct substate and behave as command below 1741 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1742 btstack_run_loop_remove_timer(&hci_stack->timeout); 1743 break; 1744 case HCI_INIT_W4_SEND_RESET: 1745 btstack_run_loop_remove_timer(&hci_stack->timeout); 1746 break; 1747 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1748 log_info("Received local name, need baud change %d", (int) need_baud_change); 1749 if (need_baud_change){ 1750 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1751 return; 1752 } 1753 // skip baud change 1754 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1755 return; 1756 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1757 // for STLC2500D, baud rate change already happened. 1758 // for others, baud rate gets changed now 1759 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1760 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1761 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1762 hci_stack->hci_transport->set_baudrate(baud_rate); 1763 } 1764 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1765 return; 1766 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1767 btstack_run_loop_remove_timer(&hci_stack->timeout); 1768 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1769 return; 1770 case HCI_INIT_W4_CUSTOM_INIT: 1771 // repeat custom init 1772 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1773 return; 1774 #else 1775 case HCI_INIT_W4_SEND_RESET: 1776 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1777 return ; 1778 #endif 1779 1780 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1781 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1782 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1783 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1784 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1785 return; 1786 } 1787 if (need_addr_change){ 1788 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1789 return; 1790 } 1791 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1792 return; 1793 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1794 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1795 if (need_baud_change){ 1796 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1797 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1798 hci_stack->hci_transport->set_baudrate(baud_rate); 1799 } 1800 if (need_addr_change){ 1801 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1802 return; 1803 } 1804 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1805 return; 1806 case HCI_INIT_W4_SET_BD_ADDR: 1807 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1808 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1809 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1810 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1811 return; 1812 } 1813 // skipping st warm boot 1814 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1815 return; 1816 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1817 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1818 return; 1819 #endif 1820 case HCI_INIT_W4_READ_BD_ADDR: 1821 // only read buffer size if supported 1822 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1823 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1824 return; 1825 } 1826 // skipping read buffer size 1827 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1828 return; 1829 case HCI_INIT_W4_SET_EVENT_MASK: 1830 // skip Classic init commands for LE only chipsets 1831 if (!hci_classic_supported()){ 1832 #ifdef ENABLE_BLE 1833 if (hci_le_supported()){ 1834 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1835 return; 1836 } 1837 #endif 1838 log_error("Neither BR/EDR nor LE supported"); 1839 hci_init_done(); 1840 return; 1841 } 1842 if (!gap_ssp_supported()){ 1843 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1844 return; 1845 } 1846 break; 1847 #ifdef ENABLE_BLE 1848 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1849 // skip write le host if not supported (e.g. on LE only EM9301) 1850 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1851 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1852 return; 1853 1854 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1855 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1856 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1857 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1858 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1859 return; 1860 } 1861 // explicit fall through to reduce repetitions 1862 1863 #ifdef ENABLE_LE_CENTRAL 1864 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1865 #else 1866 hci_init_done(); 1867 #endif 1868 return; 1869 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1870 1871 #endif /* ENABLE_BLE */ 1872 1873 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1874 // skip write secure connections host support if not supported or disabled 1875 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1876 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1877 return; 1878 } 1879 break; 1880 1881 #ifdef ENABLE_SCO_OVER_HCI 1882 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1883 // skip write synchronous flow control if not supported 1884 if (hci_stack->local_supported_commands[0] & 0x04) break; 1885 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1886 1887 /* fall through */ 1888 1889 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1890 // skip write default erroneous data reporting if not supported 1891 if (hci_stack->local_supported_commands[0] & 0x08) break; 1892 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1893 1894 /* fall through */ 1895 1896 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1897 // skip bcm set sco pcm config on non-Broadcom chipsets 1898 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1899 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1900 1901 /* fall through */ 1902 1903 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1904 if (!hci_le_supported()){ 1905 // SKIP LE init for Classic only configuration 1906 hci_init_done(); 1907 return; 1908 } 1909 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1910 break; 1911 1912 #else /* !ENABLE_SCO_OVER_HCI */ 1913 1914 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1915 #ifdef ENABLE_SCO_OVER_PCM 1916 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1917 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1918 return; 1919 } 1920 #endif 1921 /* fall through */ 1922 1923 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1924 #ifdef ENABLE_BLE 1925 if (hci_le_supported()){ 1926 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1927 return; 1928 } 1929 #endif 1930 // SKIP LE init for Classic only configuration 1931 hci_init_done(); 1932 return; 1933 #endif /* ENABLE_SCO_OVER_HCI */ 1934 1935 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1936 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1937 // Response to command before init done state -> init done 1938 case (HCI_INIT_DONE-1): 1939 hci_init_done(); 1940 return; 1941 #endif 1942 1943 default: 1944 break; 1945 } 1946 hci_initializing_next_state(); 1947 } 1948 1949 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1950 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1951 bd_addr_t bd_address; 1952 (void)memcpy(&bd_address, conn->address, 6); 1953 1954 #ifdef ENABLE_CLASSIC 1955 // cache needed data 1956 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1957 #endif 1958 1959 // connection failed, remove entry 1960 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1961 btstack_memory_hci_connection_free( conn ); 1962 1963 #ifdef ENABLE_CLASSIC 1964 // notify client if dedicated bonding 1965 if (notify_dedicated_bonding_failed){ 1966 log_info("hci notify_dedicated_bonding_failed"); 1967 hci_emit_dedicated_bonding_result(bd_address, status); 1968 } 1969 1970 // if authentication error, also delete link key 1971 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1972 gap_drop_link_key_for_bd_addr(bd_address); 1973 } 1974 #else 1975 UNUSED(status); 1976 #endif 1977 } 1978 1979 #ifdef ENABLE_CLASSIC 1980 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1981 // SSP Controller 1982 if (features[6] & (1 << 3)){ 1983 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1984 } 1985 // eSCO 1986 if (features[3] & (1<<7)){ 1987 conn->remote_supported_features[0] |= 1; 1988 } 1989 // Extended features 1990 if (features[7] & (1<<7)){ 1991 conn->remote_supported_features[0] |= 2; 1992 } 1993 } 1994 1995 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1996 // SSP Host 1997 if (features[0] & (1 << 0)){ 1998 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1999 } 2000 // SC Host 2001 if (features[0] & (1 << 3)){ 2002 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2003 } 2004 } 2005 2006 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2007 // SC Controller 2008 if (features[1] & (1 << 0)){ 2009 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2010 } 2011 } 2012 2013 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2014 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2015 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2016 if (conn->bonding_flags & BONDING_DEDICATED){ 2017 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2018 } 2019 } 2020 #endif 2021 2022 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2023 // handle BT initialization 2024 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2025 hci_initializing_event_handler(packet, size); 2026 } 2027 2028 // help with BT sleep 2029 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2030 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2031 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2032 hci_initializing_next_state(); 2033 } 2034 } 2035 2036 #ifdef ENABLE_CLASSIC 2037 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2038 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2039 conn->encryption_key_size = encryption_key_size; 2040 2041 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 2042 conn->requested_security_level = LEVEL_0; 2043 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2044 return; 2045 } 2046 2047 // Request Authentication if not already done 2048 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2049 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2050 } 2051 #endif 2052 2053 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2054 UNUSED(size); 2055 2056 uint16_t manufacturer; 2057 #ifdef ENABLE_CLASSIC 2058 hci_con_handle_t handle; 2059 hci_connection_t * conn; 2060 uint8_t status; 2061 #endif 2062 // get num cmd packets - limit to 1 to reduce complexity 2063 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2064 2065 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2066 switch (opcode){ 2067 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2068 if (packet[5]) break; 2069 // terminate, name 248 chars 2070 packet[6+248] = 0; 2071 log_info("local name: %s", &packet[6]); 2072 break; 2073 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2074 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2075 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2076 uint16_t acl_len = little_endian_read_16(packet, 6); 2077 uint16_t sco_len = packet[8]; 2078 2079 // determine usable ACL/SCO payload size 2080 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2081 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2082 2083 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2084 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2085 2086 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2087 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2088 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2089 } 2090 break; 2091 case HCI_OPCODE_HCI_READ_RSSI: 2092 if (packet[5] == ERROR_CODE_SUCCESS){ 2093 uint8_t event[5]; 2094 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2095 event[1] = 3; 2096 (void)memcpy(&event[2], &packet[6], 3); 2097 hci_emit_event(event, sizeof(event), 1); 2098 } 2099 break; 2100 #ifdef ENABLE_BLE 2101 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2102 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2103 hci_stack->le_acl_packets_total_num = packet[8]; 2104 // determine usable ACL payload size 2105 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2106 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2107 } 2108 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2109 break; 2110 #endif 2111 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2112 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2113 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2114 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2115 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); 2116 break; 2117 #endif 2118 #ifdef ENABLE_LE_CENTRAL 2119 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2120 hci_stack->le_whitelist_capacity = packet[6]; 2121 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2122 break; 2123 #endif 2124 case HCI_OPCODE_HCI_READ_BD_ADDR: 2125 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2126 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)); 2127 #ifdef ENABLE_CLASSIC 2128 if (hci_stack->link_key_db){ 2129 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2130 } 2131 #endif 2132 break; 2133 #ifdef ENABLE_CLASSIC 2134 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2135 hci_emit_discoverable_enabled(hci_stack->discoverable); 2136 break; 2137 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2138 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2139 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2140 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2141 hci_emit_event(event, sizeof(event), 1); 2142 } 2143 break; 2144 #endif 2145 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2146 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2147 2148 #ifdef ENABLE_CLASSIC 2149 // determine usable ACL packet types based on host buffer size and supported features 2150 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2151 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2152 #endif 2153 // Classic/LE 2154 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2155 break; 2156 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2157 manufacturer = little_endian_read_16(packet, 10); 2158 // map Cypress to Broadcom 2159 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2160 log_info("Treat Cypress as Broadcom"); 2161 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2162 little_endian_store_16(packet, 10, manufacturer); 2163 } 2164 hci_stack->manufacturer = manufacturer; 2165 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2166 break; 2167 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2168 hci_stack->local_supported_commands[0] = 2169 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2170 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2171 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2172 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2173 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2174 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2175 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2176 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2177 hci_stack->local_supported_commands[1] = 2178 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2179 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2180 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2181 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2182 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2183 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2184 break; 2185 #ifdef ENABLE_CLASSIC 2186 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2187 if (packet[5]) return; 2188 hci_stack->synchronous_flow_control_enabled = 1; 2189 break; 2190 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2191 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2192 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2193 conn = hci_connection_for_handle(handle); 2194 if (conn != NULL) { 2195 uint8_t key_size = 0; 2196 if (status == 0){ 2197 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2198 log_info("Handle %04x key Size: %u", handle, key_size); 2199 } else { 2200 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2201 } 2202 hci_handle_read_encryption_key_size_complete(conn, key_size); 2203 } 2204 break; 2205 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2206 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2207 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2208 uint8_t event[67]; 2209 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2210 event[1] = 65; 2211 (void)memset(&event[2], 0, 65); 2212 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2213 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2214 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2215 event[2] = 3; 2216 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2217 } else { 2218 event[2] = 1; 2219 } 2220 } 2221 hci_emit_event(event, sizeof(event), 0); 2222 break; 2223 } 2224 #endif 2225 #endif 2226 default: 2227 break; 2228 } 2229 } 2230 2231 #ifdef ENABLE_BLE 2232 static void event_handle_le_connection_complete(const uint8_t * packet){ 2233 bd_addr_t addr; 2234 bd_addr_type_t addr_type; 2235 hci_connection_t * conn; 2236 2237 // Connection management 2238 reverse_bd_addr(&packet[8], addr); 2239 addr_type = (bd_addr_type_t)packet[7]; 2240 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2241 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2242 2243 #ifdef ENABLE_LE_CENTRAL 2244 // handle error: error is reported only to the initiator -> outgoing connection 2245 if (packet[3]){ 2246 2247 // handle cancelled outgoing connection 2248 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2249 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2250 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2251 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2252 // reset state 2253 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2254 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2255 // get outgoing connection conn struct for direct connect 2256 conn = gap_get_outgoing_connection(); 2257 } 2258 2259 // outgoing le connection establishment is done 2260 if (conn){ 2261 // remove entry 2262 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2263 btstack_memory_hci_connection_free( conn ); 2264 } 2265 return; 2266 } 2267 #endif 2268 2269 // on success, both hosts receive connection complete event 2270 if (packet[6] == HCI_ROLE_MASTER){ 2271 #ifdef ENABLE_LE_CENTRAL 2272 // if we're master on an le connection, it was an outgoing connection and we're done with it 2273 // note: no hci_connection_t object exists yet for connect with whitelist 2274 if (hci_is_le_connection_type(addr_type)){ 2275 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2276 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2277 } 2278 #endif 2279 } else { 2280 #ifdef ENABLE_LE_PERIPHERAL 2281 // if we're slave, it was an incoming connection, advertisements have stopped 2282 hci_stack->le_advertisements_active = false; 2283 #endif 2284 } 2285 2286 // LE connections are auto-accepted, so just create a connection if there isn't one already 2287 if (!conn){ 2288 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2289 } 2290 2291 // no memory, sorry. 2292 if (!conn){ 2293 return; 2294 } 2295 2296 conn->state = OPEN; 2297 conn->role = packet[6]; 2298 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2299 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2300 2301 #ifdef ENABLE_LE_PERIPHERAL 2302 if (packet[6] == HCI_ROLE_SLAVE){ 2303 hci_update_advertisements_enabled_for_current_roles(); 2304 } 2305 #endif 2306 2307 // init unenhanced att bearer mtu 2308 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2309 conn->att_connection.mtu_exchanged = false; 2310 2311 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2312 2313 // restart timer 2314 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2315 // btstack_run_loop_add_timer(&conn->timeout); 2316 2317 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2318 2319 hci_emit_nr_connections_changed(); 2320 } 2321 #endif 2322 2323 #ifdef ENABLE_CLASSIC 2324 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){ 2325 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2326 // LEVEL_4 is tested by l2cap 2327 // LEVEL 3 requires MITM protection -> check io capabilities 2328 if (level >= LEVEL_3){ 2329 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2330 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2331 if ((io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) && (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY)) return false; 2332 } 2333 // LEVEL 2 requires SSP, which is a given 2334 return true; 2335 } 2336 2337 static bool hci_ssp_validate_possible_security_level(bd_addr_t addr){ 2338 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2339 if (!conn) return false; 2340 // abort pairing, if requested security level cannot be met 2341 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2342 // inlined hci_add_connection_flags_for_flipped_bd_addr 2343 connectionSetAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 2344 hci_connection_timestamp(conn); 2345 return true; 2346 } else { 2347 log_info("Level %u cannot be reached", conn->requested_security_level); 2348 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2349 return false; 2350 }; 2351 } 2352 2353 #endif 2354 2355 static void event_handler(uint8_t *packet, uint16_t size){ 2356 2357 uint16_t event_length = packet[1]; 2358 2359 // assert packet is complete 2360 if (size != (event_length + 2u)){ 2361 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2362 return; 2363 } 2364 2365 bd_addr_type_t addr_type; 2366 hci_con_handle_t handle; 2367 hci_connection_t * conn; 2368 int i; 2369 int create_connection_cmd; 2370 2371 #ifdef ENABLE_CLASSIC 2372 hci_link_type_t link_type; 2373 bd_addr_t addr; 2374 #endif 2375 2376 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2377 2378 switch (hci_event_packet_get_type(packet)) { 2379 2380 case HCI_EVENT_COMMAND_COMPLETE: 2381 handle_command_complete_event(packet, size); 2382 break; 2383 2384 case HCI_EVENT_COMMAND_STATUS: 2385 // get num cmd packets - limit to 1 to reduce complexity 2386 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2387 2388 // check command status to detected failed outgoing connections 2389 create_connection_cmd = 0; 2390 #ifdef ENABLE_CLASSIC 2391 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2392 create_connection_cmd = 1; 2393 } 2394 #endif 2395 #ifdef ENABLE_LE_CENTRAL 2396 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2397 create_connection_cmd = 1; 2398 } 2399 #endif 2400 if (create_connection_cmd) { 2401 uint8_t status = hci_event_command_status_get_status(packet); 2402 addr_type = hci_stack->outgoing_addr_type; 2403 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2404 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); 2405 2406 // reset outgoing address info 2407 memset(hci_stack->outgoing_addr, 0, 6); 2408 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2409 2410 // on error 2411 if (status != ERROR_CODE_SUCCESS){ 2412 #ifdef ENABLE_LE_CENTRAL 2413 if (hci_is_le_connection_type(addr_type)){ 2414 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2415 } 2416 #endif 2417 // error => outgoing connection failed 2418 if (conn != NULL){ 2419 hci_handle_connection_failed(conn, status); 2420 } 2421 } 2422 } 2423 2424 #ifdef ENABLE_CLASSIC 2425 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2426 uint8_t status = hci_event_command_status_get_status(packet); 2427 log_info("command status (inquiry), status %x", status); 2428 if (status == ERROR_CODE_SUCCESS) { 2429 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2430 } else { 2431 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2432 } 2433 } 2434 #endif 2435 break; 2436 2437 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2438 if (size < 3) return; 2439 uint16_t num_handles = packet[2]; 2440 if (size != (3u + num_handles * 4u)) return; 2441 uint16_t offset = 3; 2442 for (i=0; i<num_handles;i++){ 2443 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2444 offset += 2u; 2445 uint16_t num_packets = little_endian_read_16(packet, offset); 2446 offset += 2u; 2447 2448 conn = hci_connection_for_handle(handle); 2449 if (!conn){ 2450 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2451 continue; 2452 } 2453 2454 if (conn->num_packets_sent >= num_packets){ 2455 conn->num_packets_sent -= num_packets; 2456 } else { 2457 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2458 conn->num_packets_sent = 0; 2459 } 2460 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2461 2462 #ifdef ENABLE_CLASSIC 2463 // For SCO, we do the can_send_now_check here 2464 hci_notify_if_sco_can_send_now(); 2465 #endif 2466 } 2467 break; 2468 } 2469 2470 #ifdef ENABLE_CLASSIC 2471 case HCI_EVENT_INQUIRY_COMPLETE: 2472 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2473 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2474 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2475 hci_emit_event(event, sizeof(event), 1); 2476 } 2477 break; 2478 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2479 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2480 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2481 } 2482 break; 2483 case HCI_EVENT_CONNECTION_REQUEST: 2484 reverse_bd_addr(&packet[2], addr); 2485 link_type = (hci_link_type_t) packet[11]; 2486 if (hci_stack->gap_classic_accept_callback != NULL){ 2487 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2488 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2489 bd_addr_copy(hci_stack->decline_addr, addr); 2490 break; 2491 } 2492 } 2493 2494 // TODO: eval COD 8-10 2495 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2496 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2497 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2498 if (!conn) { 2499 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2500 } 2501 if (!conn) { 2502 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2503 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2504 bd_addr_copy(hci_stack->decline_addr, addr); 2505 break; 2506 } 2507 conn->role = HCI_ROLE_SLAVE; 2508 conn->state = RECEIVED_CONNECTION_REQUEST; 2509 // store info about eSCO 2510 if (link_type == HCI_LINK_TYPE_ESCO){ 2511 conn->remote_supported_features[0] |= 1; 2512 } 2513 hci_run(); 2514 break; 2515 2516 case HCI_EVENT_CONNECTION_COMPLETE: 2517 // Connection management 2518 reverse_bd_addr(&packet[5], addr); 2519 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2520 addr_type = BD_ADDR_TYPE_ACL; 2521 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2522 if (conn) { 2523 if (!packet[2]){ 2524 conn->state = OPEN; 2525 conn->con_handle = little_endian_read_16(packet, 3); 2526 2527 // queue get remote feature 2528 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2529 2530 // queue set supervision timeout if we're master 2531 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2532 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2533 } 2534 2535 // restart timer 2536 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2537 btstack_run_loop_add_timer(&conn->timeout); 2538 2539 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2540 2541 hci_emit_nr_connections_changed(); 2542 } else { 2543 // connection failed 2544 hci_handle_connection_failed(conn, packet[2]); 2545 } 2546 } 2547 break; 2548 2549 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2550 reverse_bd_addr(&packet[5], addr); 2551 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2552 if (packet[2]){ 2553 // connection failed 2554 break; 2555 } 2556 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2557 if (!conn) { 2558 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2559 } 2560 if (!conn) { 2561 break; 2562 } 2563 conn->state = OPEN; 2564 conn->con_handle = little_endian_read_16(packet, 3); 2565 2566 #ifdef ENABLE_SCO_OVER_HCI 2567 // update SCO 2568 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2569 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2570 } 2571 // trigger can send now 2572 if (hci_have_usb_transport()){ 2573 hci_stack->sco_can_send_now = 1; 2574 } 2575 #endif 2576 #ifdef HAVE_SCO_TRANSPORT 2577 // configure sco transport 2578 if (hci_stack->sco_transport != NULL){ 2579 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2580 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2581 } 2582 #endif 2583 break; 2584 2585 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2586 handle = little_endian_read_16(packet, 3); 2587 conn = hci_connection_for_handle(handle); 2588 if (!conn) break; 2589 if (!packet[2]){ 2590 const uint8_t * features = &packet[5]; 2591 hci_handle_remote_features_page_0(conn, features); 2592 2593 // read extended features if possible 2594 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2595 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2596 break; 2597 } 2598 } 2599 hci_handle_remote_features_received(conn); 2600 break; 2601 2602 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2603 handle = little_endian_read_16(packet, 3); 2604 conn = hci_connection_for_handle(handle); 2605 if (!conn) break; 2606 // status = ok, page = 1 2607 if (!packet[2]) { 2608 uint8_t page_number = packet[5]; 2609 uint8_t maximum_page_number = packet[6]; 2610 const uint8_t * features = &packet[7]; 2611 bool done = false; 2612 switch (page_number){ 2613 case 1: 2614 hci_handle_remote_features_page_1(conn, features); 2615 if (maximum_page_number >= 2){ 2616 // get Secure Connections (Controller) from Page 2 if available 2617 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2618 } else { 2619 // otherwise, assume SC (Controller) == SC (Host) 2620 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2621 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2622 } 2623 done = true; 2624 } 2625 break; 2626 case 2: 2627 hci_handle_remote_features_page_2(conn, features); 2628 done = true; 2629 break; 2630 default: 2631 break; 2632 } 2633 if (!done) break; 2634 } 2635 hci_handle_remote_features_received(conn); 2636 break; 2637 2638 case HCI_EVENT_LINK_KEY_REQUEST: 2639 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2640 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2641 // request handled by hci_run() 2642 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2643 break; 2644 2645 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2646 reverse_bd_addr(&packet[2], addr); 2647 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2648 if (!conn) break; 2649 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2650 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2651 // Change Connection Encryption keeps link key type 2652 if (link_key_type != CHANGED_COMBINATION_KEY){ 2653 conn->link_key_type = link_key_type; 2654 } 2655 // only store link key: 2656 // - if bondable enabled 2657 if (hci_stack->bondable == false) break; 2658 // - if security level sufficient 2659 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2660 // - for SSP, also check if remote side requested bonding as well 2661 if (conn->link_key_type != COMBINATION_KEY){ 2662 uint8_t auth_req_ignoring_mitm = conn->io_cap_response_auth_req & 0xfe; 2663 if (auth_req_ignoring_mitm == SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_NO_BONDING){ 2664 break; 2665 } 2666 } 2667 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2668 // still forward event to allow dismiss of pairing dialog 2669 break; 2670 } 2671 2672 case HCI_EVENT_PIN_CODE_REQUEST: 2673 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2674 // non-bondable mode: pin code negative reply will be sent 2675 if (!hci_stack->bondable){ 2676 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2677 hci_run(); 2678 return; 2679 } 2680 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2681 if (!hci_stack->link_key_db) break; 2682 hci_event_pin_code_request_get_bd_addr(packet, addr); 2683 hci_stack->link_key_db->delete_link_key(addr); 2684 break; 2685 2686 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2687 hci_event_io_capability_response_get_bd_addr(packet, addr); 2688 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2689 if (!conn) break; 2690 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2691 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2692 break; 2693 2694 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2695 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2696 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2697 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2698 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2699 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2700 } else { 2701 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2702 } 2703 #endif 2704 break; 2705 2706 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2707 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2708 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2709 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_REMOTE_OOB_DATA_REPLY); 2710 break; 2711 #endif 2712 2713 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2714 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2715 if (hci_ssp_validate_possible_security_level(addr) == false) break; 2716 if (!hci_stack->ssp_auto_accept) break; 2717 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2718 break; 2719 2720 case HCI_EVENT_USER_PASSKEY_REQUEST: 2721 hci_event_user_passkey_request_get_bd_addr(packet, addr); 2722 if (hci_ssp_validate_possible_security_level(addr) == false) break; 2723 if (!hci_stack->ssp_auto_accept) break; 2724 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2725 break; 2726 2727 case HCI_EVENT_MODE_CHANGE: 2728 handle = hci_event_mode_change_get_handle(packet); 2729 conn = hci_connection_for_handle(handle); 2730 if (!conn) break; 2731 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2732 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2733 break; 2734 #endif 2735 2736 case HCI_EVENT_ENCRYPTION_CHANGE: 2737 handle = hci_event_encryption_change_get_connection_handle(packet); 2738 conn = hci_connection_for_handle(handle); 2739 if (!conn) break; 2740 if (hci_event_encryption_change_get_status(packet) == 0u) { 2741 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2742 if (encryption_enabled){ 2743 if (hci_is_le_connection(conn)){ 2744 // For LE, we accept connection as encrypted 2745 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2746 } 2747 #ifdef ENABLE_CLASSIC 2748 else { 2749 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2750 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2751 bool connected_uses_aes_ccm = encryption_enabled == 2; 2752 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2753 log_info("SC during pairing, but only E0 now -> abort"); 2754 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2755 break; 2756 } 2757 2758 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2759 if (connected_uses_aes_ccm){ 2760 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2761 } 2762 2763 #ifdef ENABLE_TESTING_SUPPORT 2764 // work around for issue with PTS dongle 2765 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2766 #endif 2767 2768 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2769 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2770 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2771 } else { 2772 // if not, pretend everything is perfect 2773 hci_handle_read_encryption_key_size_complete(conn, 16); 2774 } 2775 } 2776 #endif 2777 } else { 2778 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2779 } 2780 } 2781 2782 break; 2783 2784 #ifdef ENABLE_CLASSIC 2785 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2786 handle = hci_event_authentication_complete_get_connection_handle(packet); 2787 conn = hci_connection_for_handle(handle); 2788 if (!conn) break; 2789 2790 // ignore authentication event if we didn't request it 2791 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2792 2793 // dedicated bonding: send result and disconnect 2794 if (conn->bonding_flags & BONDING_DEDICATED){ 2795 conn->bonding_flags &= ~BONDING_DEDICATED; 2796 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2797 conn->bonding_status = packet[2]; 2798 break; 2799 } 2800 2801 // authenticated only if auth status == 0 2802 if (hci_event_authentication_complete_get_status(packet) == 0){ 2803 // authenticated 2804 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2805 2806 // If not already encrypted, start encryption 2807 if ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0){ 2808 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2809 break; 2810 } 2811 } 2812 2813 // emit updated security level 2814 conn->requested_security_level = LEVEL_0; 2815 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2816 break; 2817 #endif 2818 2819 // HCI_EVENT_DISCONNECTION_COMPLETE 2820 // has been split, to first notify stack before shutting connection down 2821 // see end of function, too. 2822 case HCI_EVENT_DISCONNECTION_COMPLETE: 2823 if (packet[2]) break; // status != 0 2824 handle = little_endian_read_16(packet, 3); 2825 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2826 if (hci_stack->acl_fragmentation_total_size > 0u) { 2827 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2828 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2829 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2830 hci_stack->acl_fragmentation_total_size = 0; 2831 hci_stack->acl_fragmentation_pos = 0; 2832 if (release_buffer){ 2833 hci_release_packet_buffer(); 2834 } 2835 } 2836 } 2837 2838 conn = hci_connection_for_handle(handle); 2839 if (!conn) break; 2840 // mark connection for shutdown 2841 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2842 2843 // emit dedicatd bonding event 2844 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2845 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2846 } 2847 2848 #ifdef ENABLE_BLE 2849 #ifdef ENABLE_LE_PERIPHERAL 2850 // re-enable advertisements for le connections if active 2851 if (hci_is_le_connection(conn)){ 2852 hci_update_advertisements_enabled_for_current_roles(); 2853 } 2854 #endif 2855 #endif 2856 break; 2857 2858 case HCI_EVENT_HARDWARE_ERROR: 2859 log_error("Hardware Error: 0x%02x", packet[2]); 2860 if (hci_stack->hardware_error_callback){ 2861 (*hci_stack->hardware_error_callback)(packet[2]); 2862 } else { 2863 // if no special requests, just reboot stack 2864 hci_power_control_off(); 2865 hci_power_control_on(); 2866 } 2867 break; 2868 2869 #ifdef ENABLE_CLASSIC 2870 case HCI_EVENT_ROLE_CHANGE: 2871 if (packet[2]) break; // status != 0 2872 reverse_bd_addr(&packet[3], addr); 2873 addr_type = BD_ADDR_TYPE_ACL; 2874 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2875 if (!conn) break; 2876 conn->role = packet[9]; 2877 break; 2878 #endif 2879 2880 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2881 // release packet buffer only for asynchronous transport and if there are not further fragements 2882 if (hci_transport_synchronous()) { 2883 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2884 return; // instead of break: to avoid re-entering hci_run() 2885 } 2886 hci_stack->acl_fragmentation_tx_active = 0; 2887 if (hci_stack->acl_fragmentation_total_size) break; 2888 hci_release_packet_buffer(); 2889 2890 // L2CAP receives this event via the hci_emit_event below 2891 2892 #ifdef ENABLE_CLASSIC 2893 // For SCO, we do the can_send_now_check here 2894 hci_notify_if_sco_can_send_now(); 2895 #endif 2896 break; 2897 2898 #ifdef ENABLE_CLASSIC 2899 case HCI_EVENT_SCO_CAN_SEND_NOW: 2900 // For SCO, we do the can_send_now_check here 2901 hci_stack->sco_can_send_now = 1; 2902 hci_notify_if_sco_can_send_now(); 2903 return; 2904 2905 // explode inquriy results for easier consumption 2906 case HCI_EVENT_INQUIRY_RESULT: 2907 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2908 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2909 gap_inquiry_explode(packet, size); 2910 break; 2911 #endif 2912 2913 #ifdef ENABLE_BLE 2914 case HCI_EVENT_LE_META: 2915 switch (packet[2]){ 2916 #ifdef ENABLE_LE_CENTRAL 2917 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2918 // log_info("advertising report received"); 2919 if (!hci_stack->le_scanning_enabled) break; 2920 le_handle_advertisement_report(packet, size); 2921 break; 2922 #endif 2923 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2924 event_handle_le_connection_complete(packet); 2925 break; 2926 2927 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2928 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2929 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2930 conn = hci_connection_for_handle(handle); 2931 if (!conn) break; 2932 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2933 break; 2934 2935 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2936 // connection 2937 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2938 conn = hci_connection_for_handle(handle); 2939 if (conn) { 2940 // read arguments 2941 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2942 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2943 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2944 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2945 2946 // validate against current connection parameter range 2947 le_connection_parameter_range_t existing_range; 2948 gap_get_connection_parameter_range(&existing_range); 2949 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2950 if (update_parameter){ 2951 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2952 conn->le_conn_interval_min = le_conn_interval_min; 2953 conn->le_conn_interval_max = le_conn_interval_max; 2954 conn->le_conn_latency = le_conn_latency; 2955 conn->le_supervision_timeout = le_supervision_timeout; 2956 } else { 2957 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 2958 } 2959 } 2960 break; 2961 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2962 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2963 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2964 conn = hci_connection_for_handle(handle); 2965 if (conn) { 2966 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2967 } 2968 break; 2969 #endif 2970 default: 2971 break; 2972 } 2973 break; 2974 #endif 2975 case HCI_EVENT_VENDOR_SPECIFIC: 2976 // Vendor specific commands often create vendor specific event instead of num completed packets 2977 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2978 switch (hci_stack->manufacturer){ 2979 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2980 hci_stack->num_cmd_packets = 1; 2981 break; 2982 default: 2983 break; 2984 } 2985 break; 2986 default: 2987 break; 2988 } 2989 2990 handle_event_for_current_stack_state(packet, size); 2991 2992 // notify upper stack 2993 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2994 2995 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2996 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 2997 handle = little_endian_read_16(packet, 3); 2998 hci_connection_t * aConn = hci_connection_for_handle(handle); 2999 // discard connection if app did not trigger a reconnect in the event handler 3000 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3001 hci_shutdown_connection(aConn); 3002 } 3003 } 3004 3005 // execute main loop 3006 hci_run(); 3007 } 3008 3009 #ifdef ENABLE_CLASSIC 3010 3011 #ifdef ENABLE_SCO_OVER_HCI 3012 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3013 static void sco_schedule_tx(hci_connection_t * conn); 3014 3015 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3016 log_debug("SCO TX Timeout"); 3017 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3018 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3019 if (!conn) return; 3020 3021 // trigger send 3022 conn->sco_tx_ready = 1; 3023 // extra packet if CVSD but SCO buffer is too short 3024 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3025 conn->sco_tx_ready++; 3026 } 3027 hci_notify_if_sco_can_send_now(); 3028 } 3029 3030 3031 #define SCO_TX_AFTER_RX_MS (6) 3032 3033 static void sco_schedule_tx(hci_connection_t * conn){ 3034 3035 uint32_t now = btstack_run_loop_get_time_ms(); 3036 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3037 int time_delta_ms = sco_tx_ms - now; 3038 3039 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3040 3041 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3042 btstack_run_loop_set_timer(timer, time_delta_ms); 3043 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3044 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3045 btstack_run_loop_add_timer(timer); 3046 } 3047 #endif 3048 3049 static void sco_handler(uint8_t * packet, uint16_t size){ 3050 // lookup connection struct 3051 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3052 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3053 if (!conn) return; 3054 3055 #ifdef ENABLE_SCO_OVER_HCI 3056 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3057 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3058 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3059 packet[2] = 0x3c; 3060 memmove(&packet[3], &packet[23], 63); 3061 size = 63; 3062 } 3063 } 3064 3065 if (hci_have_usb_transport()){ 3066 // Nothing to do 3067 } else { 3068 // 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); 3069 if (hci_stack->synchronous_flow_control_enabled == 0){ 3070 uint32_t now = btstack_run_loop_get_time_ms(); 3071 3072 if (!conn->sco_rx_valid){ 3073 // ignore first 10 packets 3074 conn->sco_rx_count++; 3075 // log_debug("sco rx count %u", conn->sco_rx_count); 3076 if (conn->sco_rx_count == 10) { 3077 // use first timestamp as is and pretent it just started 3078 conn->sco_rx_ms = now; 3079 conn->sco_rx_valid = 1; 3080 conn->sco_rx_count = 0; 3081 sco_schedule_tx(conn); 3082 } 3083 } else { 3084 // track expected arrival timme 3085 conn->sco_rx_count++; 3086 conn->sco_rx_ms += 7; 3087 int delta = (int32_t) (now - conn->sco_rx_ms); 3088 if (delta > 0){ 3089 conn->sco_rx_ms++; 3090 } 3091 // log_debug("sco rx %u", conn->sco_rx_ms); 3092 sco_schedule_tx(conn); 3093 } 3094 } 3095 } 3096 #endif 3097 3098 // deliver to app 3099 if (hci_stack->sco_packet_handler) { 3100 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3101 } 3102 3103 #ifdef HAVE_SCO_TRANSPORT 3104 // We can send one packet for each received packet 3105 conn->sco_tx_ready++; 3106 hci_notify_if_sco_can_send_now(); 3107 #endif 3108 3109 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3110 conn->num_packets_completed++; 3111 hci_stack->host_completed_packets = 1; 3112 hci_run(); 3113 #endif 3114 } 3115 #endif 3116 3117 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3118 hci_dump_packet(packet_type, 1, packet, size); 3119 switch (packet_type) { 3120 case HCI_EVENT_PACKET: 3121 event_handler(packet, size); 3122 break; 3123 case HCI_ACL_DATA_PACKET: 3124 acl_handler(packet, size); 3125 break; 3126 #ifdef ENABLE_CLASSIC 3127 case HCI_SCO_DATA_PACKET: 3128 sco_handler(packet, size); 3129 break; 3130 #endif 3131 default: 3132 break; 3133 } 3134 } 3135 3136 /** 3137 * @brief Add event packet handler. 3138 */ 3139 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3140 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3141 } 3142 3143 3144 /** Register HCI packet handlers */ 3145 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3146 hci_stack->acl_packet_handler = handler; 3147 } 3148 3149 #ifdef ENABLE_CLASSIC 3150 /** 3151 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3152 */ 3153 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3154 hci_stack->sco_packet_handler = handler; 3155 } 3156 #endif 3157 3158 static void hci_state_reset(void){ 3159 // no connections yet 3160 hci_stack->connections = NULL; 3161 3162 // keep discoverable/connectable as this has been requested by the client(s) 3163 // hci_stack->discoverable = 0; 3164 // hci_stack->connectable = 0; 3165 // hci_stack->bondable = 1; 3166 // hci_stack->own_addr_type = 0; 3167 3168 // buffer is free 3169 hci_stack->hci_packet_buffer_reserved = 0; 3170 3171 // no pending cmds 3172 hci_stack->decline_reason = 0; 3173 hci_stack->new_scan_enable_value = 0xff; 3174 3175 hci_stack->secure_connections_active = false; 3176 3177 #ifdef ENABLE_CLASSIC 3178 hci_stack->new_page_scan_interval = 0xffff; 3179 hci_stack->new_page_scan_window = 0xffff; 3180 hci_stack->new_page_scan_type = 0xff; 3181 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3182 #endif 3183 3184 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3185 hci_stack->classic_read_local_oob_data = true; 3186 #endif 3187 3188 // LE 3189 #ifdef ENABLE_BLE 3190 memset(hci_stack->le_random_address, 0, 6); 3191 hci_stack->le_random_address_set = 0; 3192 #endif 3193 #ifdef ENABLE_LE_CENTRAL 3194 hci_stack->le_scanning_active = false; 3195 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3196 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3197 hci_stack->le_whitelist_capacity = 0; 3198 #endif 3199 #ifdef ENABLE_LE_PERIPHERAL 3200 hci_stack->le_advertisements_active = false; 3201 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3202 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3203 } 3204 if (hci_stack->le_advertisements_data != NULL){ 3205 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3206 } 3207 #endif 3208 } 3209 3210 #ifdef ENABLE_CLASSIC 3211 /** 3212 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3213 */ 3214 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3215 // store and open remote device db 3216 hci_stack->link_key_db = link_key_db; 3217 if (hci_stack->link_key_db) { 3218 hci_stack->link_key_db->open(); 3219 } 3220 } 3221 #endif 3222 3223 void hci_init(const hci_transport_t *transport, const void *config){ 3224 3225 #ifdef HAVE_MALLOC 3226 if (!hci_stack) { 3227 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3228 } 3229 #else 3230 hci_stack = &hci_stack_static; 3231 #endif 3232 memset(hci_stack, 0, sizeof(hci_stack_t)); 3233 3234 // reference to use transport layer implementation 3235 hci_stack->hci_transport = transport; 3236 3237 // reference to used config 3238 hci_stack->config = config; 3239 3240 // setup pointer for outgoing packet buffer 3241 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3242 3243 // max acl payload size defined in config.h 3244 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3245 3246 // register packet handlers with transport 3247 transport->register_packet_handler(&packet_handler); 3248 3249 hci_stack->state = HCI_STATE_OFF; 3250 3251 // class of device 3252 hci_stack->class_of_device = 0x007a020c; // Smartphone 3253 3254 // bondable by default 3255 hci_stack->bondable = 1; 3256 3257 #ifdef ENABLE_CLASSIC 3258 // classic name 3259 hci_stack->local_name = default_classic_name; 3260 3261 // Master slave policy 3262 hci_stack->master_slave_policy = 1; 3263 3264 // Allow Role Switch 3265 hci_stack->allow_role_switch = 1; 3266 3267 // Default / minimum security level = 2 3268 hci_stack->gap_security_level = LEVEL_2; 3269 3270 // Default Security Mode 4 3271 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3272 3273 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3274 hci_stack->gap_required_encyrption_key_size = 7; 3275 3276 // Link Supervision Timeout 3277 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3278 3279 #endif 3280 3281 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3282 hci_stack->ssp_enable = 1; 3283 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3284 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3285 hci_stack->ssp_auto_accept = 1; 3286 3287 // Secure Connections: enable (requires support from Controller) 3288 hci_stack->secure_connections_enable = true; 3289 3290 // voice setting - signed 16 bit pcm data with CVSD over the air 3291 hci_stack->sco_voice_setting = 0x60; 3292 3293 #ifdef ENABLE_LE_CENTRAL 3294 // connection parameter to use for outgoing connections 3295 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3296 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3297 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3298 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3299 hci_stack->le_connection_latency = 4; // 4 3300 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3301 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3302 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3303 3304 // default LE Scanning 3305 hci_stack->le_scan_type = 0x1; // active 3306 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3307 hci_stack->le_scan_window = 0x30; // 30 ms 3308 #endif 3309 3310 #ifdef ENABLE_LE_PERIPHERAL 3311 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3312 #endif 3313 3314 // connection parameter range used to answer connection parameter update requests in l2cap 3315 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3316 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3317 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3318 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3319 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3320 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3321 3322 hci_state_reset(); 3323 } 3324 3325 void hci_deinit(void){ 3326 #ifdef HAVE_MALLOC 3327 if (hci_stack) { 3328 free(hci_stack); 3329 } 3330 #endif 3331 hci_stack = NULL; 3332 3333 #ifdef ENABLE_CLASSIC 3334 disable_l2cap_timeouts = 0; 3335 #endif 3336 } 3337 3338 /** 3339 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3340 */ 3341 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3342 hci_stack->chipset = chipset_driver; 3343 3344 // reset chipset driver - init is also called on power_up 3345 if (hci_stack->chipset && hci_stack->chipset->init){ 3346 hci_stack->chipset->init(hci_stack->config); 3347 } 3348 } 3349 3350 /** 3351 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3352 */ 3353 void hci_set_control(const btstack_control_t *hardware_control){ 3354 // references to used control implementation 3355 hci_stack->control = hardware_control; 3356 // init with transport config 3357 hardware_control->init(hci_stack->config); 3358 } 3359 3360 void hci_close(void){ 3361 3362 #ifdef ENABLE_CLASSIC 3363 // close remote device db 3364 if (hci_stack->link_key_db) { 3365 hci_stack->link_key_db->close(); 3366 } 3367 #endif 3368 3369 btstack_linked_list_iterator_t lit; 3370 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3371 while (btstack_linked_list_iterator_has_next(&lit)){ 3372 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3373 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3374 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3375 hci_shutdown_connection(connection); 3376 } 3377 3378 hci_power_control(HCI_POWER_OFF); 3379 3380 #ifdef HAVE_MALLOC 3381 free(hci_stack); 3382 #endif 3383 hci_stack = NULL; 3384 } 3385 3386 #ifdef HAVE_SCO_TRANSPORT 3387 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3388 hci_stack->sco_transport = sco_transport; 3389 sco_transport->register_packet_handler(&packet_handler); 3390 } 3391 #endif 3392 3393 #ifdef ENABLE_CLASSIC 3394 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3395 // validate ranage and set 3396 if (encryption_key_size < 7) return; 3397 if (encryption_key_size > 16) return; 3398 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3399 } 3400 3401 void gap_set_security_mode(gap_security_mode_t security_mode){ 3402 btstack_assert((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)); 3403 hci_stack->gap_security_mode = security_mode; 3404 } 3405 3406 gap_security_mode_t gap_get_security_mode(void){ 3407 return hci_stack->gap_security_mode; 3408 } 3409 3410 void gap_set_security_level(gap_security_level_t security_level){ 3411 hci_stack->gap_security_level = security_level; 3412 } 3413 3414 gap_security_level_t gap_get_security_level(void){ 3415 return hci_stack->gap_security_level; 3416 } 3417 3418 void gap_set_secure_connections_only_mode(bool enable){ 3419 hci_stack->gap_secure_connections_only_mode = enable; 3420 } 3421 3422 bool gap_get_secure_connections_only_mode(void){ 3423 return hci_stack->gap_secure_connections_only_mode; 3424 } 3425 #endif 3426 3427 #ifdef ENABLE_CLASSIC 3428 void gap_set_class_of_device(uint32_t class_of_device){ 3429 hci_stack->class_of_device = class_of_device; 3430 } 3431 3432 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3433 hci_stack->default_link_policy_settings = default_link_policy_settings; 3434 } 3435 3436 void gap_set_allow_role_switch(bool allow_role_switch){ 3437 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3438 } 3439 3440 uint8_t hci_get_allow_role_switch(void){ 3441 return hci_stack->allow_role_switch; 3442 } 3443 3444 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3445 hci_stack->link_supervision_timeout = link_supervision_timeout; 3446 } 3447 3448 void hci_disable_l2cap_timeout_check(void){ 3449 disable_l2cap_timeouts = 1; 3450 } 3451 #endif 3452 3453 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3454 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3455 void hci_set_bd_addr(bd_addr_t addr){ 3456 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3457 hci_stack->custom_bd_addr_set = 1; 3458 } 3459 #endif 3460 3461 // State-Module-Driver overview 3462 // state module low-level 3463 // HCI_STATE_OFF off close 3464 // HCI_STATE_INITIALIZING, on open 3465 // HCI_STATE_WORKING, on open 3466 // HCI_STATE_HALTING, on open 3467 // HCI_STATE_SLEEPING, off/sleep close 3468 // HCI_STATE_FALLING_ASLEEP on open 3469 3470 static int hci_power_control_on(void){ 3471 3472 // power on 3473 int err = 0; 3474 if (hci_stack->control && hci_stack->control->on){ 3475 err = (*hci_stack->control->on)(); 3476 } 3477 if (err){ 3478 log_error( "POWER_ON failed"); 3479 hci_emit_hci_open_failed(); 3480 return err; 3481 } 3482 3483 // int chipset driver 3484 if (hci_stack->chipset && hci_stack->chipset->init){ 3485 hci_stack->chipset->init(hci_stack->config); 3486 } 3487 3488 // init transport 3489 if (hci_stack->hci_transport->init){ 3490 hci_stack->hci_transport->init(hci_stack->config); 3491 } 3492 3493 // open transport 3494 err = hci_stack->hci_transport->open(); 3495 if (err){ 3496 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3497 if (hci_stack->control && hci_stack->control->off){ 3498 (*hci_stack->control->off)(); 3499 } 3500 hci_emit_hci_open_failed(); 3501 return err; 3502 } 3503 return 0; 3504 } 3505 3506 static void hci_power_control_off(void){ 3507 3508 log_info("hci_power_control_off"); 3509 3510 // close low-level device 3511 hci_stack->hci_transport->close(); 3512 3513 log_info("hci_power_control_off - hci_transport closed"); 3514 3515 // power off 3516 if (hci_stack->control && hci_stack->control->off){ 3517 (*hci_stack->control->off)(); 3518 } 3519 3520 log_info("hci_power_control_off - control closed"); 3521 3522 hci_stack->state = HCI_STATE_OFF; 3523 } 3524 3525 static void hci_power_control_sleep(void){ 3526 3527 log_info("hci_power_control_sleep"); 3528 3529 #if 0 3530 // don't close serial port during sleep 3531 3532 // close low-level device 3533 hci_stack->hci_transport->close(hci_stack->config); 3534 #endif 3535 3536 // sleep mode 3537 if (hci_stack->control && hci_stack->control->sleep){ 3538 (*hci_stack->control->sleep)(); 3539 } 3540 3541 hci_stack->state = HCI_STATE_SLEEPING; 3542 } 3543 3544 static int hci_power_control_wake(void){ 3545 3546 log_info("hci_power_control_wake"); 3547 3548 // wake on 3549 if (hci_stack->control && hci_stack->control->wake){ 3550 (*hci_stack->control->wake)(); 3551 } 3552 3553 #if 0 3554 // open low-level device 3555 int err = hci_stack->hci_transport->open(hci_stack->config); 3556 if (err){ 3557 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3558 if (hci_stack->control && hci_stack->control->off){ 3559 (*hci_stack->control->off)(); 3560 } 3561 hci_emit_hci_open_failed(); 3562 return err; 3563 } 3564 #endif 3565 3566 return 0; 3567 } 3568 3569 static void hci_power_transition_to_initializing(void){ 3570 // set up state machine 3571 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3572 hci_stack->hci_packet_buffer_reserved = 0; 3573 hci_stack->state = HCI_STATE_INITIALIZING; 3574 hci_stack->substate = HCI_INIT_SEND_RESET; 3575 } 3576 3577 // returns error 3578 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3579 int err; 3580 switch (power_mode){ 3581 case HCI_POWER_ON: 3582 err = hci_power_control_on(); 3583 if (err != 0) { 3584 log_error("hci_power_control_on() error %d", err); 3585 return err; 3586 } 3587 hci_power_transition_to_initializing(); 3588 break; 3589 case HCI_POWER_OFF: 3590 // do nothing 3591 break; 3592 case HCI_POWER_SLEEP: 3593 // do nothing (with SLEEP == OFF) 3594 break; 3595 default: 3596 btstack_assert(false); 3597 break; 3598 } 3599 return ERROR_CODE_SUCCESS; 3600 } 3601 3602 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3603 switch (power_mode){ 3604 case HCI_POWER_ON: 3605 // do nothing 3606 break; 3607 case HCI_POWER_OFF: 3608 // no connections yet, just turn it off 3609 hci_power_control_off(); 3610 break; 3611 case HCI_POWER_SLEEP: 3612 // no connections yet, just turn it off 3613 hci_power_control_sleep(); 3614 break; 3615 default: 3616 btstack_assert(false); 3617 break; 3618 } 3619 return ERROR_CODE_SUCCESS; 3620 } 3621 3622 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3623 switch (power_mode){ 3624 case HCI_POWER_ON: 3625 // do nothing 3626 break; 3627 case HCI_POWER_OFF: 3628 // see hci_run 3629 hci_stack->state = HCI_STATE_HALTING; 3630 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3631 break; 3632 case HCI_POWER_SLEEP: 3633 // see hci_run 3634 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3635 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3636 break; 3637 default: 3638 btstack_assert(false); 3639 break; 3640 } 3641 return ERROR_CODE_SUCCESS; 3642 } 3643 3644 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3645 switch (power_mode){ 3646 case HCI_POWER_ON: 3647 hci_power_transition_to_initializing(); 3648 break; 3649 case HCI_POWER_OFF: 3650 // do nothing 3651 break; 3652 case HCI_POWER_SLEEP: 3653 // see hci_run 3654 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3655 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3656 break; 3657 default: 3658 btstack_assert(false); 3659 break; 3660 } 3661 return ERROR_CODE_SUCCESS; 3662 } 3663 3664 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3665 switch (power_mode){ 3666 case HCI_POWER_ON: 3667 3668 #ifdef HAVE_PLATFORM_IPHONE_OS 3669 // nothing to do, if H4 supports power management 3670 if (btstack_control_iphone_power_management_enabled()){ 3671 hci_stack->state = HCI_STATE_INITIALIZING; 3672 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3673 break; 3674 } 3675 #endif 3676 hci_power_transition_to_initializing(); 3677 break; 3678 case HCI_POWER_OFF: 3679 // see hci_run 3680 hci_stack->state = HCI_STATE_HALTING; 3681 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3682 break; 3683 case HCI_POWER_SLEEP: 3684 // do nothing 3685 break; 3686 default: 3687 btstack_assert(false); 3688 break; 3689 } 3690 return ERROR_CODE_SUCCESS; 3691 } 3692 3693 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3694 int err; 3695 switch (power_mode){ 3696 case HCI_POWER_ON: 3697 #ifdef HAVE_PLATFORM_IPHONE_OS 3698 // nothing to do, if H4 supports power management 3699 if (btstack_control_iphone_power_management_enabled()){ 3700 hci_stack->state = HCI_STATE_INITIALIZING; 3701 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3702 hci_update_scan_enable(); 3703 break; 3704 } 3705 #endif 3706 err = hci_power_control_wake(); 3707 if (err) return err; 3708 hci_power_transition_to_initializing(); 3709 break; 3710 case HCI_POWER_OFF: 3711 hci_stack->state = HCI_STATE_HALTING; 3712 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3713 break; 3714 case HCI_POWER_SLEEP: 3715 // do nothing 3716 break; 3717 default: 3718 btstack_assert(false); 3719 break; 3720 } 3721 return ERROR_CODE_SUCCESS; 3722 } 3723 3724 int hci_power_control(HCI_POWER_MODE power_mode){ 3725 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3726 int err = 0; 3727 switch (hci_stack->state){ 3728 case HCI_STATE_OFF: 3729 err = hci_power_control_state_off(power_mode); 3730 break; 3731 case HCI_STATE_INITIALIZING: 3732 err = hci_power_control_state_initializing(power_mode); 3733 break; 3734 case HCI_STATE_WORKING: 3735 err = hci_power_control_state_working(power_mode); 3736 break; 3737 case HCI_STATE_HALTING: 3738 err = hci_power_control_state_halting(power_mode); 3739 break; 3740 case HCI_STATE_FALLING_ASLEEP: 3741 err = hci_power_control_state_falling_asleep(power_mode); 3742 break; 3743 case HCI_STATE_SLEEPING: 3744 err = hci_power_control_state_sleeping(power_mode); 3745 break; 3746 default: 3747 btstack_assert(false); 3748 break; 3749 } 3750 if (err != 0){ 3751 return err; 3752 } 3753 3754 // create internal event 3755 hci_emit_state(); 3756 3757 // trigger next/first action 3758 hci_run(); 3759 3760 return 0; 3761 } 3762 3763 3764 #ifdef ENABLE_CLASSIC 3765 3766 static void hci_update_scan_enable(void){ 3767 // 2 = page scan, 1 = inq scan 3768 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3769 hci_run(); 3770 } 3771 3772 void gap_discoverable_control(uint8_t enable){ 3773 if (enable) enable = 1; // normalize argument 3774 3775 if (hci_stack->discoverable == enable){ 3776 hci_emit_discoverable_enabled(hci_stack->discoverable); 3777 return; 3778 } 3779 3780 hci_stack->discoverable = enable; 3781 hci_update_scan_enable(); 3782 } 3783 3784 void gap_connectable_control(uint8_t enable){ 3785 if (enable) enable = 1; // normalize argument 3786 3787 // don't emit event 3788 if (hci_stack->connectable == enable) return; 3789 3790 hci_stack->connectable = enable; 3791 hci_update_scan_enable(); 3792 } 3793 #endif 3794 3795 void gap_local_bd_addr(bd_addr_t address_buffer){ 3796 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3797 } 3798 3799 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3800 static void hci_host_num_completed_packets(void){ 3801 3802 // create packet manually as arrays are not supported and num_commands should not get reduced 3803 hci_reserve_packet_buffer(); 3804 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3805 3806 uint16_t size = 0; 3807 uint16_t num_handles = 0; 3808 packet[size++] = 0x35; 3809 packet[size++] = 0x0c; 3810 size++; // skip param len 3811 size++; // skip num handles 3812 3813 // add { handle, packets } entries 3814 btstack_linked_item_t * it; 3815 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3816 hci_connection_t * connection = (hci_connection_t *) it; 3817 if (connection->num_packets_completed){ 3818 little_endian_store_16(packet, size, connection->con_handle); 3819 size += 2; 3820 little_endian_store_16(packet, size, connection->num_packets_completed); 3821 size += 2; 3822 // 3823 num_handles++; 3824 connection->num_packets_completed = 0; 3825 } 3826 } 3827 3828 packet[2] = size - 3; 3829 packet[3] = num_handles; 3830 3831 hci_stack->host_completed_packets = 0; 3832 3833 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3834 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3835 3836 // release packet buffer for synchronous transport implementations 3837 if (hci_transport_synchronous()){ 3838 hci_release_packet_buffer(); 3839 hci_emit_transport_packet_sent(); 3840 } 3841 } 3842 #endif 3843 3844 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3845 UNUSED(ds); 3846 hci_stack->substate = HCI_HALTING_CLOSE; 3847 // allow packet handlers to defer final shutdown 3848 hci_emit_state(); 3849 hci_run(); 3850 } 3851 3852 static bool hci_run_acl_fragments(void){ 3853 if (hci_stack->acl_fragmentation_total_size > 0u) { 3854 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3855 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3856 if (connection) { 3857 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3858 hci_send_acl_packet_fragments(connection); 3859 return true; 3860 } 3861 } else { 3862 // connection gone -> discard further fragments 3863 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3864 hci_stack->acl_fragmentation_total_size = 0; 3865 hci_stack->acl_fragmentation_pos = 0; 3866 } 3867 } 3868 return false; 3869 } 3870 3871 #ifdef ENABLE_CLASSIC 3872 static bool hci_run_general_gap_classic(void){ 3873 3874 // decline incoming connections 3875 if (hci_stack->decline_reason){ 3876 uint8_t reason = hci_stack->decline_reason; 3877 hci_stack->decline_reason = 0; 3878 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3879 return true; 3880 } 3881 // write page scan activity 3882 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_interval != 0xffff) && hci_classic_supported()){ 3883 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 3884 hci_stack->new_page_scan_interval = 0xffff; 3885 hci_stack->new_page_scan_window = 0xffff; 3886 return true; 3887 } 3888 // write page scan type 3889 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_type != 0xff) && hci_classic_supported()){ 3890 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 3891 hci_stack->new_page_scan_type = 0xff; 3892 return true; 3893 } 3894 // send scan enable 3895 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3896 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3897 hci_stack->new_scan_enable_value = 0xff; 3898 return true; 3899 } 3900 // start/stop inquiry 3901 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3902 uint8_t duration = hci_stack->inquiry_state; 3903 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 3904 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 3905 return true; 3906 } 3907 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3908 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3909 hci_send_cmd(&hci_inquiry_cancel); 3910 return true; 3911 } 3912 // remote name request 3913 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3914 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3915 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3916 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3917 return true; 3918 } 3919 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3920 // Local OOB data 3921 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 3922 hci_stack->classic_read_local_oob_data = false; 3923 if (hci_stack->local_supported_commands[1] & 0x10u){ 3924 hci_send_cmd(&hci_read_local_extended_oob_data); 3925 } else { 3926 hci_send_cmd(&hci_read_local_oob_data); 3927 } 3928 } 3929 #endif 3930 // pairing 3931 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3932 uint8_t state = hci_stack->gap_pairing_state; 3933 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3934 uint8_t pin_code[16]; 3935 switch (state){ 3936 case GAP_PAIRING_STATE_SEND_PIN: 3937 memset(pin_code, 0, 16); 3938 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 3939 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 3940 break; 3941 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3942 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3943 break; 3944 case GAP_PAIRING_STATE_SEND_PASSKEY: 3945 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3946 break; 3947 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3948 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3949 break; 3950 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3951 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3952 break; 3953 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3954 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3955 break; 3956 default: 3957 break; 3958 } 3959 return true; 3960 } 3961 return false; 3962 } 3963 #endif 3964 3965 #ifdef ENABLE_BLE 3966 static bool hci_run_general_gap_le(void){ 3967 3968 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3969 3970 if (hci_stack->state != HCI_STATE_WORKING) return false; 3971 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3972 3973 3974 // Phase 1: collect what to stop 3975 3976 bool scanning_stop = false; 3977 bool connecting_stop = false; 3978 bool advertising_stop = false; 3979 3980 #ifndef ENABLE_LE_CENTRAL 3981 UNUSED(scanning_stop); 3982 UNUSED(connecting_stop); 3983 #endif 3984 #ifndef ENABLE_LE_PERIPHERAL 3985 UNUSED(advertising_stop); 3986 #endif 3987 3988 // check if whitelist needs modification 3989 bool whitelist_modification_pending = false; 3990 btstack_linked_list_iterator_t lit; 3991 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3992 while (btstack_linked_list_iterator_has_next(&lit)){ 3993 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3994 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3995 whitelist_modification_pending = true; 3996 break; 3997 } 3998 } 3999 // check if resolving list needs modification 4000 bool resolving_list_modification_pending = false; 4001 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4002 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4003 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4004 resolving_list_modification_pending = true; 4005 } 4006 #endif 4007 4008 #ifdef ENABLE_LE_CENTRAL 4009 // scanning control 4010 if (hci_stack->le_scanning_active) { 4011 // stop if: 4012 // - parameter change required 4013 // - it's disabled 4014 // - whitelist change required but used for scanning 4015 // - resolving list modified 4016 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4017 if ((hci_stack->le_scanning_param_update) || 4018 !hci_stack->le_scanning_enabled || 4019 scanning_uses_whitelist || 4020 resolving_list_modification_pending){ 4021 4022 scanning_stop = true; 4023 } 4024 } 4025 #endif 4026 4027 #ifdef ENABLE_LE_CENTRAL 4028 // connecting control 4029 bool connecting_with_whitelist; 4030 switch (hci_stack->le_connecting_state){ 4031 case LE_CONNECTING_DIRECT: 4032 case LE_CONNECTING_WHITELIST: 4033 // stop connecting if: 4034 // - connecting uses white and whitelist modification pending 4035 // - if it got disabled 4036 // - resolving list modified 4037 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4038 if ((connecting_with_whitelist && whitelist_modification_pending) || 4039 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4040 resolving_list_modification_pending) { 4041 4042 connecting_stop = true; 4043 } 4044 break; 4045 default: 4046 break; 4047 } 4048 #endif 4049 4050 #ifdef ENABLE_LE_PERIPHERAL 4051 // le advertisement control 4052 if (hci_stack->le_advertisements_active){ 4053 // stop if: 4054 // - parameter change required 4055 // - it's disabled 4056 // - whitelist change required but used for advertisement filter policy 4057 // - resolving list modified 4058 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4059 bool advertising_change = (hci_stack->le_advertisements_todo & (LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_SET_ADV_DATA)) != 0; 4060 if (advertising_change || 4061 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4062 (advertising_uses_whitelist & whitelist_modification_pending) || 4063 resolving_list_modification_pending) { 4064 4065 advertising_stop = true; 4066 } 4067 } 4068 #endif 4069 4070 4071 // Phase 2: stop everything that should be off during modifications 4072 4073 #ifdef ENABLE_LE_CENTRAL 4074 if (scanning_stop){ 4075 hci_stack->le_scanning_active = false; 4076 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4077 return true; 4078 } 4079 #endif 4080 4081 #ifdef ENABLE_LE_CENTRAL 4082 if (connecting_stop){ 4083 hci_send_cmd(&hci_le_create_connection_cancel); 4084 return true; 4085 } 4086 #endif 4087 4088 #ifdef ENABLE_LE_PERIPHERAL 4089 if (advertising_stop){ 4090 hci_stack->le_advertisements_active = false; 4091 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4092 return true; 4093 } 4094 #endif 4095 4096 // Phase 3: modify 4097 4098 #ifdef ENABLE_LE_CENTRAL 4099 if (hci_stack->le_scanning_param_update){ 4100 hci_stack->le_scanning_param_update = false; 4101 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4102 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4103 return true; 4104 } 4105 #endif 4106 4107 #ifdef ENABLE_LE_PERIPHERAL 4108 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4109 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4110 hci_send_cmd(&hci_le_set_advertising_parameters, 4111 hci_stack->le_advertisements_interval_min, 4112 hci_stack->le_advertisements_interval_max, 4113 hci_stack->le_advertisements_type, 4114 hci_stack->le_own_addr_type, 4115 hci_stack->le_advertisements_direct_address_type, 4116 hci_stack->le_advertisements_direct_address, 4117 hci_stack->le_advertisements_channel_map, 4118 hci_stack->le_advertisements_filter_policy); 4119 return true; 4120 } 4121 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4122 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4123 uint8_t adv_data_clean[31]; 4124 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4125 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4126 hci_stack->le_advertisements_data_len); 4127 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4128 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4129 return true; 4130 } 4131 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4132 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4133 uint8_t scan_data_clean[31]; 4134 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4135 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4136 hci_stack->le_scan_response_data_len); 4137 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4138 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4139 return true; 4140 } 4141 #endif 4142 4143 4144 #ifdef ENABLE_LE_CENTRAL 4145 // if connect with whitelist was active and is not cancelled yet, wait until next time 4146 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4147 #endif 4148 4149 // LE Whitelist Management 4150 if (whitelist_modification_pending){ 4151 // add/remove entries 4152 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4153 while (btstack_linked_list_iterator_has_next(&lit)){ 4154 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4155 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4156 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4157 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4158 return true; 4159 } 4160 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4161 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4162 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4163 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4164 return true; 4165 } 4166 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4167 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4168 btstack_memory_whitelist_entry_free(entry); 4169 } 4170 } 4171 } 4172 4173 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4174 // LE Resolving List Management 4175 if (resolving_list_supported) { 4176 uint16_t i; 4177 switch (hci_stack->le_resolving_list_state) { 4178 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4179 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4180 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4181 return true; 4182 case LE_RESOLVING_LIST_READ_SIZE: 4183 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4184 hci_send_cmd(&hci_le_read_resolving_list_size); 4185 return true; 4186 case LE_RESOLVING_LIST_SEND_CLEAR: 4187 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4188 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4189 sizeof(hci_stack->le_resolving_list_add_entries)); 4190 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4191 sizeof(hci_stack->le_resolving_list_remove_entries)); 4192 hci_send_cmd(&hci_le_clear_resolving_list); 4193 return true; 4194 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4195 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4196 uint8_t offset = i >> 3; 4197 uint8_t mask = 1 << (i & 7); 4198 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4199 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4200 bd_addr_t peer_identity_addreses; 4201 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4202 sm_key_t peer_irk; 4203 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4204 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4205 4206 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4207 // trigger whitelist entry 'update' (work around for controller bug) 4208 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4209 while (btstack_linked_list_iterator_has_next(&lit)) { 4210 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4211 if (entry->address_type != peer_identity_addr_type) continue; 4212 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4213 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4214 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4215 } 4216 #endif 4217 4218 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4219 peer_identity_addreses); 4220 return true; 4221 } 4222 4223 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4224 4225 /* fall through */ 4226 4227 case LE_RESOLVING_LIST_ADD_ENTRIES: 4228 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4229 uint8_t offset = i >> 3; 4230 uint8_t mask = 1 << (i & 7); 4231 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4232 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4233 bd_addr_t peer_identity_addreses; 4234 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4235 sm_key_t peer_irk; 4236 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4237 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4238 const uint8_t *local_irk = gap_get_persistent_irk(); 4239 // command uses format specifier 'P' that stores 16-byte value without flip 4240 uint8_t local_irk_flipped[16]; 4241 uint8_t peer_irk_flipped[16]; 4242 reverse_128(local_irk, local_irk_flipped); 4243 reverse_128(peer_irk, peer_irk_flipped); 4244 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4245 peer_irk_flipped, local_irk_flipped); 4246 return true; 4247 } 4248 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4249 break; 4250 4251 default: 4252 break; 4253 } 4254 } 4255 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4256 #endif 4257 4258 // Phase 4: restore state 4259 4260 #ifdef ENABLE_LE_CENTRAL 4261 // re-start scanning 4262 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4263 hci_stack->le_scanning_active = true; 4264 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4265 return true; 4266 } 4267 #endif 4268 4269 #ifdef ENABLE_LE_CENTRAL 4270 // re-start connecting 4271 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4272 bd_addr_t null_addr; 4273 memset(null_addr, 0, 6); 4274 hci_send_cmd(&hci_le_create_connection, 4275 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4276 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4277 1, // use whitelist 4278 0, // peer address type 4279 null_addr, // peer bd addr 4280 hci_stack->le_own_addr_type, // our addr type: 4281 hci_stack->le_connection_interval_min, // conn interval min 4282 hci_stack->le_connection_interval_max, // conn interval max 4283 hci_stack->le_connection_latency, // conn latency 4284 hci_stack->le_supervision_timeout, // conn latency 4285 hci_stack->le_minimum_ce_length, // min ce length 4286 hci_stack->le_maximum_ce_length // max ce length 4287 ); 4288 return true; 4289 } 4290 #endif 4291 4292 #ifdef ENABLE_LE_PERIPHERAL 4293 // re-start advertising 4294 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4295 // check if advertisements should be enabled given 4296 hci_stack->le_advertisements_active = true; 4297 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4298 return true; 4299 } 4300 #endif 4301 4302 return false; 4303 } 4304 #endif 4305 4306 static bool hci_run_general_pending_commands(void){ 4307 btstack_linked_item_t * it; 4308 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4309 hci_connection_t * connection = (hci_connection_t *) it; 4310 4311 switch(connection->state){ 4312 case SEND_CREATE_CONNECTION: 4313 switch(connection->address_type){ 4314 #ifdef ENABLE_CLASSIC 4315 case BD_ADDR_TYPE_ACL: 4316 log_info("sending hci_create_connection"); 4317 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4318 break; 4319 #endif 4320 default: 4321 #ifdef ENABLE_BLE 4322 #ifdef ENABLE_LE_CENTRAL 4323 log_info("sending hci_le_create_connection"); 4324 hci_send_cmd(&hci_le_create_connection, 4325 hci_stack->le_connection_scan_interval, // conn scan interval 4326 hci_stack->le_connection_scan_window, // conn scan windows 4327 0, // don't use whitelist 4328 connection->address_type, // peer address type 4329 connection->address, // peer bd addr 4330 hci_stack->le_own_addr_type, // our addr type: 4331 hci_stack->le_connection_interval_min, // conn interval min 4332 hci_stack->le_connection_interval_max, // conn interval max 4333 hci_stack->le_connection_latency, // conn latency 4334 hci_stack->le_supervision_timeout, // conn latency 4335 hci_stack->le_minimum_ce_length, // min ce length 4336 hci_stack->le_maximum_ce_length // max ce length 4337 ); 4338 connection->state = SENT_CREATE_CONNECTION; 4339 #endif 4340 #endif 4341 break; 4342 } 4343 return true; 4344 4345 #ifdef ENABLE_CLASSIC 4346 case RECEIVED_CONNECTION_REQUEST: 4347 connection->role = HCI_ROLE_SLAVE; 4348 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4349 log_info("sending hci_accept_connection_request"); 4350 connection->state = ACCEPTED_CONNECTION_REQUEST; 4351 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4352 } 4353 return true; 4354 #endif 4355 4356 #ifdef ENABLE_BLE 4357 #ifdef ENABLE_LE_CENTRAL 4358 case SEND_CANCEL_CONNECTION: 4359 connection->state = SENT_CANCEL_CONNECTION; 4360 hci_send_cmd(&hci_le_create_connection_cancel); 4361 return true; 4362 #endif 4363 #endif 4364 case SEND_DISCONNECT: 4365 connection->state = SENT_DISCONNECT; 4366 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4367 return true; 4368 4369 default: 4370 break; 4371 } 4372 4373 // no further commands if connection is about to get shut down 4374 if (connection->state == SENT_DISCONNECT) continue; 4375 4376 if (connection->authentication_flags & READ_RSSI){ 4377 connectionClearAuthenticationFlags(connection, READ_RSSI); 4378 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4379 return true; 4380 } 4381 4382 #ifdef ENABLE_CLASSIC 4383 4384 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4385 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4386 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4387 return true; 4388 } 4389 4390 // Handling link key request requires remote supported features 4391 if ( ((connection->authentication_flags & HANDLE_LINK_KEY_REQUEST) != 0) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4392 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4393 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4394 4395 link_key_t link_key; 4396 link_key_type_t link_key_type; 4397 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 4398 4399 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4400 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4401 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 4402 if (sc_downgrade){ 4403 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4404 connection->state = SENT_DISCONNECT; 4405 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4406 return true; 4407 } 4408 4409 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 4410 if (have_link_key && security_level_sufficient){ 4411 connection->link_key_type = link_key_type; 4412 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 4413 } else { 4414 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4415 } 4416 return true; 4417 } 4418 4419 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4420 log_info("denying to pin request"); 4421 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4422 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4423 return true; 4424 } 4425 4426 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4427 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4428 // set authentication requirements: 4429 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4430 // - BONDING MODE: Dedicated if requested, otherwise bondable flag 4431 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4432 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4433 authreq |= 1; 4434 } 4435 if (connection->bonding_flags & BONDING_DEDICATED){ 4436 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4437 } else if (hci_stack->bondable){ 4438 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4439 } 4440 uint8_t have_oob_data = 0; 4441 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4442 if (connection->classic_oob_c_192 != NULL){ 4443 have_oob_data |= 1; 4444 } 4445 if (connection->classic_oob_c_256 != NULL){ 4446 have_oob_data |= 2; 4447 } 4448 #endif 4449 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4450 return true; 4451 } 4452 4453 if (connection->authentication_flags & SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4454 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4455 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4456 return true; 4457 } 4458 4459 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4460 if (connection->authentication_flags & SEND_REMOTE_OOB_DATA_REPLY){ 4461 connectionClearAuthenticationFlags(connection, SEND_REMOTE_OOB_DATA_REPLY); 4462 const uint8_t zero[16] = { 0 }; 4463 const uint8_t * r_192 = zero; 4464 const uint8_t * c_192 = zero; 4465 const uint8_t * r_256 = zero; 4466 const uint8_t * c_256 = zero; 4467 // verify P-256 OOB 4468 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4469 c_256 = connection->classic_oob_c_256; 4470 if (connection->classic_oob_r_256 != NULL) { 4471 r_256 = connection->classic_oob_r_256; 4472 } 4473 } 4474 // verify P-192 OOB 4475 if ((connection->classic_oob_c_192 != NULL)) { 4476 c_192 = connection->classic_oob_c_192; 4477 if (connection->classic_oob_r_192 != NULL) { 4478 r_192 = connection->classic_oob_r_192; 4479 } 4480 } 4481 // Reply 4482 if (c_256 != zero) { 4483 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4484 } else if (c_192 != zero){ 4485 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4486 } else { 4487 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4488 } 4489 return true; 4490 } 4491 #endif 4492 4493 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4494 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4495 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4496 return true; 4497 } 4498 4499 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4500 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4501 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4502 return true; 4503 } 4504 4505 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4506 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4507 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4508 return true; 4509 } 4510 4511 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4512 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4513 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4514 return true; 4515 } 4516 4517 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4518 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4519 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4520 return true; 4521 } 4522 4523 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4524 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4525 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4526 connection->state = SENT_DISCONNECT; 4527 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4528 return true; 4529 } 4530 4531 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4532 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4533 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4534 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4535 return true; 4536 } 4537 4538 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4539 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4540 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4541 return true; 4542 } 4543 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4544 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4545 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4546 return true; 4547 } 4548 #endif 4549 4550 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4551 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4552 if (connection->state != SENT_DISCONNECT){ 4553 connection->state = SENT_DISCONNECT; 4554 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4555 return true; 4556 } 4557 } 4558 4559 #ifdef ENABLE_CLASSIC 4560 uint16_t sniff_min_interval; 4561 switch (connection->sniff_min_interval){ 4562 case 0: 4563 break; 4564 case 0xffff: 4565 connection->sniff_min_interval = 0; 4566 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4567 return true; 4568 default: 4569 sniff_min_interval = connection->sniff_min_interval; 4570 connection->sniff_min_interval = 0; 4571 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4572 return true; 4573 } 4574 4575 if (connection->sniff_subrating_max_latency != 0xffff){ 4576 uint16_t max_latency = connection->sniff_subrating_max_latency; 4577 connection->sniff_subrating_max_latency = 0; 4578 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4579 return true; 4580 } 4581 4582 if (connection->qos_service_type != HCI_SERVICE_TyPE_INVALID){ 4583 uint8_t service_type = (uint8_t) connection->qos_service_type; 4584 connection->qos_service_type = HCI_SERVICE_TyPE_INVALID; 4585 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); 4586 return true; 4587 } 4588 4589 if (connection->request_role != HCI_ROLE_INVALID){ 4590 hci_role_t role = connection->request_role; 4591 connection->request_role = HCI_ROLE_INVALID; 4592 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4593 return true; 4594 } 4595 #endif 4596 4597 #ifdef ENABLE_BLE 4598 switch (connection->le_con_parameter_update_state){ 4599 // response to L2CAP CON PARAMETER UPDATE REQUEST 4600 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4601 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4602 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4603 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4604 0x0000, 0xffff); 4605 return true; 4606 case CON_PARAMETER_UPDATE_REPLY: 4607 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4608 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4609 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4610 0x0000, 0xffff); 4611 return true; 4612 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4613 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4614 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4615 return true; 4616 default: 4617 break; 4618 } 4619 if (connection->le_phy_update_all_phys != 0xffu){ 4620 uint8_t all_phys = connection->le_phy_update_all_phys; 4621 connection->le_phy_update_all_phys = 0xff; 4622 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); 4623 return true; 4624 } 4625 #endif 4626 } 4627 return false; 4628 } 4629 4630 static void hci_run(void){ 4631 4632 bool done; 4633 4634 // send continuation fragments first, as they block the prepared packet buffer 4635 done = hci_run_acl_fragments(); 4636 if (done) return; 4637 4638 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4639 // send host num completed packets next as they don't require num_cmd_packets > 0 4640 if (!hci_can_send_comand_packet_transport()) return; 4641 if (hci_stack->host_completed_packets){ 4642 hci_host_num_completed_packets(); 4643 return; 4644 } 4645 #endif 4646 4647 if (!hci_can_send_command_packet_now()) return; 4648 4649 // global/non-connection oriented commands 4650 4651 4652 #ifdef ENABLE_CLASSIC 4653 // general gap classic 4654 done = hci_run_general_gap_classic(); 4655 if (done) return; 4656 #endif 4657 4658 #ifdef ENABLE_BLE 4659 // general gap le 4660 done = hci_run_general_gap_le(); 4661 if (done) return; 4662 #endif 4663 4664 // send pending HCI commands 4665 done = hci_run_general_pending_commands(); 4666 if (done) return; 4667 4668 // stack state sub statemachines 4669 hci_connection_t * connection; 4670 switch (hci_stack->state){ 4671 case HCI_STATE_INITIALIZING: 4672 hci_initializing_run(); 4673 break; 4674 4675 case HCI_STATE_HALTING: 4676 4677 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4678 switch (hci_stack->substate){ 4679 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4680 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4681 4682 #ifdef ENABLE_BLE 4683 #ifdef ENABLE_LE_CENTRAL 4684 // free whitelist entries 4685 { 4686 btstack_linked_list_iterator_t lit; 4687 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4688 while (btstack_linked_list_iterator_has_next(&lit)){ 4689 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4690 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4691 btstack_memory_whitelist_entry_free(entry); 4692 } 4693 } 4694 #endif 4695 #endif 4696 // close all open connections 4697 connection = (hci_connection_t *) hci_stack->connections; 4698 if (connection){ 4699 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4700 if (!hci_can_send_command_packet_now()) return; 4701 4702 // check state 4703 if (connection->state == SENT_DISCONNECT) return; 4704 connection->state = SENT_DISCONNECT; 4705 4706 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4707 4708 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4709 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4710 4711 // ... which would be ignored anyway as we shutdown (free) the connection now 4712 hci_shutdown_connection(connection); 4713 4714 // finally, send the disconnect command 4715 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4716 return; 4717 } 4718 4719 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4720 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4721 log_info("HCI_STATE_HALTING: wait 50 ms"); 4722 hci_stack->substate = HCI_HALTING_W4_TIMER; 4723 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4724 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4725 btstack_run_loop_add_timer(&hci_stack->timeout); 4726 break; 4727 } 4728 4729 /* fall through */ 4730 4731 case HCI_HALTING_CLOSE: 4732 log_info("HCI_STATE_HALTING, calling off"); 4733 4734 // switch mode 4735 hci_power_control_off(); 4736 4737 log_info("HCI_STATE_HALTING, emitting state"); 4738 hci_emit_state(); 4739 log_info("HCI_STATE_HALTING, done"); 4740 break; 4741 4742 case HCI_HALTING_W4_TIMER: 4743 // keep waiting 4744 4745 break; 4746 default: 4747 break; 4748 } 4749 4750 break; 4751 4752 case HCI_STATE_FALLING_ASLEEP: 4753 switch(hci_stack->substate) { 4754 case HCI_FALLING_ASLEEP_DISCONNECT: 4755 log_info("HCI_STATE_FALLING_ASLEEP"); 4756 // close all open connections 4757 connection = (hci_connection_t *) hci_stack->connections; 4758 4759 #ifdef HAVE_PLATFORM_IPHONE_OS 4760 // don't close connections, if H4 supports power management 4761 if (btstack_control_iphone_power_management_enabled()){ 4762 connection = NULL; 4763 } 4764 #endif 4765 if (connection){ 4766 4767 // send disconnect 4768 if (!hci_can_send_command_packet_now()) return; 4769 4770 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4771 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4772 4773 // send disconnected event right away - causes higher layer connections to get closed, too. 4774 hci_shutdown_connection(connection); 4775 return; 4776 } 4777 4778 if (hci_classic_supported()){ 4779 // disable page and inquiry scan 4780 if (!hci_can_send_command_packet_now()) return; 4781 4782 log_info("HCI_STATE_HALTING, disabling inq scans"); 4783 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4784 4785 // continue in next sub state 4786 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4787 break; 4788 } 4789 4790 /* fall through */ 4791 4792 case HCI_FALLING_ASLEEP_COMPLETE: 4793 log_info("HCI_STATE_HALTING, calling sleep"); 4794 #ifdef HAVE_PLATFORM_IPHONE_OS 4795 // don't actually go to sleep, if H4 supports power management 4796 if (btstack_control_iphone_power_management_enabled()){ 4797 // SLEEP MODE reached 4798 hci_stack->state = HCI_STATE_SLEEPING; 4799 hci_emit_state(); 4800 break; 4801 } 4802 #endif 4803 // switch mode 4804 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4805 hci_emit_state(); 4806 break; 4807 4808 default: 4809 break; 4810 } 4811 break; 4812 4813 default: 4814 break; 4815 } 4816 } 4817 4818 int hci_send_cmd_packet(uint8_t *packet, int size){ 4819 // house-keeping 4820 4821 #ifdef ENABLE_CLASSIC 4822 bd_addr_t addr; 4823 hci_connection_t * conn; 4824 #endif 4825 #ifdef ENABLE_LE_CENTRAL 4826 uint8_t initiator_filter_policy; 4827 #endif 4828 4829 uint16_t opcode = little_endian_read_16(packet, 0); 4830 switch (opcode) { 4831 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4832 hci_stack->loopback_mode = packet[3]; 4833 break; 4834 4835 #ifdef ENABLE_CLASSIC 4836 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4837 reverse_bd_addr(&packet[3], addr); 4838 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4839 4840 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4841 if (!conn) { 4842 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4843 if (!conn) { 4844 // notify client that alloc failed 4845 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4846 return -1; // packet not sent to controller 4847 } 4848 conn->state = SEND_CREATE_CONNECTION; 4849 conn->role = HCI_ROLE_MASTER; 4850 } 4851 log_info("conn state %u", conn->state); 4852 switch (conn->state) { 4853 // if connection active exists 4854 case OPEN: 4855 // and OPEN, emit connection complete command 4856 hci_emit_connection_complete(addr, conn->con_handle, 0); 4857 return -1; // packet not sent to controller 4858 case RECEIVED_DISCONNECTION_COMPLETE: 4859 // create connection triggered in disconnect complete event, let's do it now 4860 break; 4861 case SEND_CREATE_CONNECTION: 4862 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4863 break; 4864 default: 4865 // otherwise, just ignore as it is already in the open process 4866 return -1; // packet not sent to controller 4867 } 4868 conn->state = SENT_CREATE_CONNECTION; 4869 4870 // track outgoing connection 4871 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4872 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4873 break; 4874 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4875 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4876 break; 4877 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4878 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4879 break; 4880 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4881 if (hci_stack->link_key_db) { 4882 reverse_bd_addr(&packet[3], addr); 4883 hci_stack->link_key_db->delete_link_key(addr); 4884 } 4885 break; 4886 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4887 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4888 reverse_bd_addr(&packet[3], addr); 4889 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4890 if (conn) { 4891 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4892 } 4893 break; 4894 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4895 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4896 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4897 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4898 reverse_bd_addr(&packet[3], addr); 4899 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4900 if (conn) { 4901 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4902 } 4903 break; 4904 4905 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 4906 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4907 // setup_synchronous_connection? Voice setting at offset 22 4908 // TODO: compare to current setting if sco connection already active 4909 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4910 break; 4911 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4912 // accept_synchronus_connection? Voice setting at offset 18 4913 // TODO: compare to current setting if sco connection already active 4914 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4915 break; 4916 #endif 4917 #endif 4918 4919 #ifdef ENABLE_BLE 4920 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4921 hci_stack->le_random_address_set = 1; 4922 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4923 break; 4924 #ifdef ENABLE_LE_PERIPHERAL 4925 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4926 hci_stack->le_advertisements_active = packet[3] != 0; 4927 break; 4928 #endif 4929 #ifdef ENABLE_LE_CENTRAL 4930 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4931 // white list used? 4932 initiator_filter_policy = packet[7]; 4933 switch (initiator_filter_policy) { 4934 case 0: 4935 // whitelist not used 4936 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4937 break; 4938 case 1: 4939 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4940 break; 4941 default: 4942 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4943 break; 4944 } 4945 // track outgoing connection 4946 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 4947 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 4948 break; 4949 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4950 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 4951 break; 4952 #endif 4953 #endif 4954 default: 4955 break; 4956 } 4957 4958 hci_stack->num_cmd_packets--; 4959 4960 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4961 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4962 } 4963 4964 // disconnect because of security block 4965 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4966 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4967 if (!connection) return; 4968 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4969 } 4970 4971 4972 // Configure Secure Simple Pairing 4973 4974 #ifdef ENABLE_CLASSIC 4975 4976 // enable will enable SSP during init 4977 void gap_ssp_set_enable(int enable){ 4978 hci_stack->ssp_enable = enable; 4979 } 4980 4981 static int hci_local_ssp_activated(void){ 4982 return gap_ssp_supported() && hci_stack->ssp_enable; 4983 } 4984 4985 // if set, BTstack will respond to io capability request using authentication requirement 4986 void gap_ssp_set_io_capability(int io_capability){ 4987 hci_stack->ssp_io_capability = io_capability; 4988 } 4989 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4990 hci_stack->ssp_authentication_requirement = authentication_requirement; 4991 } 4992 4993 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4994 void gap_ssp_set_auto_accept(int auto_accept){ 4995 hci_stack->ssp_auto_accept = auto_accept; 4996 } 4997 4998 void gap_secure_connections_enable(bool enable){ 4999 hci_stack->secure_connections_enable = enable; 5000 } 5001 5002 #endif 5003 5004 // va_list part of hci_send_cmd 5005 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 5006 if (!hci_can_send_command_packet_now()){ 5007 log_error("hci_send_cmd called but cannot send packet now"); 5008 return 0; 5009 } 5010 5011 // for HCI INITIALIZATION 5012 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5013 hci_stack->last_cmd_opcode = cmd->opcode; 5014 5015 hci_reserve_packet_buffer(); 5016 uint8_t * packet = hci_stack->hci_packet_buffer; 5017 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5018 int err = hci_send_cmd_packet(packet, size); 5019 5020 // release packet buffer on error or for synchronous transport implementations 5021 if ((err < 0) || hci_transport_synchronous()){ 5022 hci_release_packet_buffer(); 5023 hci_emit_transport_packet_sent(); 5024 } 5025 5026 return err; 5027 } 5028 5029 /** 5030 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5031 */ 5032 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 5033 va_list argptr; 5034 va_start(argptr, cmd); 5035 int res = hci_send_cmd_va_arg(cmd, argptr); 5036 va_end(argptr); 5037 return res; 5038 } 5039 5040 // Create various non-HCI events. 5041 // TODO: generalize, use table similar to hci_create_command 5042 5043 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5044 // dump packet 5045 if (dump) { 5046 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5047 } 5048 5049 // dispatch to all event handlers 5050 btstack_linked_list_iterator_t it; 5051 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5052 while (btstack_linked_list_iterator_has_next(&it)){ 5053 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5054 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5055 } 5056 } 5057 5058 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5059 if (!hci_stack->acl_packet_handler) return; 5060 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5061 } 5062 5063 #ifdef ENABLE_CLASSIC 5064 static void hci_notify_if_sco_can_send_now(void){ 5065 // notify SCO sender if waiting 5066 if (!hci_stack->sco_waiting_for_can_send_now) return; 5067 if (hci_can_send_sco_packet_now()){ 5068 hci_stack->sco_waiting_for_can_send_now = 0; 5069 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5070 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5071 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5072 } 5073 } 5074 5075 // parsing end emitting has been merged to reduce code size 5076 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5077 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5078 5079 uint8_t * eir_data; 5080 ad_context_t context; 5081 const uint8_t * name; 5082 uint8_t name_len; 5083 5084 if (size < 3) return; 5085 5086 int event_type = hci_event_packet_get_type(packet); 5087 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5088 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5089 5090 switch (event_type){ 5091 case HCI_EVENT_INQUIRY_RESULT: 5092 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5093 if (size != (3 + (num_responses * 14))) return; 5094 break; 5095 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5096 if (size != 257) return; 5097 if (num_responses != 1) return; 5098 break; 5099 default: 5100 return; 5101 } 5102 5103 // event[1] is set at the end 5104 int i; 5105 for (i=0; i<num_responses;i++){ 5106 memset(event, 0, sizeof(event)); 5107 event[0] = GAP_EVENT_INQUIRY_RESULT; 5108 uint8_t event_size = 18; // if name is not set by EIR 5109 5110 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5111 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5112 (void)memcpy(&event[9], 5113 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5114 3); // class of device 5115 (void)memcpy(&event[12], 5116 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5117 2); // clock offset 5118 5119 switch (event_type){ 5120 case HCI_EVENT_INQUIRY_RESULT: 5121 // 14,15,16,17 = 0, size 18 5122 break; 5123 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5124 event[14] = 1; 5125 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5126 // 16,17 = 0, size 18 5127 break; 5128 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5129 event[14] = 1; 5130 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5131 // EIR packets only contain a single inquiry response 5132 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5133 name = NULL; 5134 // Iterate over EIR data 5135 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5136 uint8_t data_type = ad_iterator_get_data_type(&context); 5137 uint8_t data_size = ad_iterator_get_data_len(&context); 5138 const uint8_t * data = ad_iterator_get_data(&context); 5139 // Prefer Complete Local Name over Shortened Local Name 5140 switch (data_type){ 5141 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5142 if (name) continue; 5143 /* fall through */ 5144 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5145 name = data; 5146 name_len = data_size; 5147 break; 5148 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5149 if (data_size != 8) break; 5150 event[16] = 1; 5151 memcpy(&event[17], data, 8); 5152 break; 5153 default: 5154 break; 5155 } 5156 } 5157 if (name){ 5158 event[25] = 1; 5159 // truncate name if needed 5160 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5161 event[26] = len; 5162 (void)memcpy(&event[27], name, len); 5163 event_size += len; 5164 } 5165 break; 5166 default: 5167 return; 5168 } 5169 event[1] = event_size - 2; 5170 hci_emit_event(event, event_size, 1); 5171 } 5172 } 5173 #endif 5174 5175 void hci_emit_state(void){ 5176 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5177 uint8_t event[3]; 5178 event[0] = BTSTACK_EVENT_STATE; 5179 event[1] = sizeof(event) - 2u; 5180 event[2] = hci_stack->state; 5181 hci_emit_event(event, sizeof(event), 1); 5182 } 5183 5184 #ifdef ENABLE_CLASSIC 5185 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5186 uint8_t event[13]; 5187 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5188 event[1] = sizeof(event) - 2; 5189 event[2] = status; 5190 little_endian_store_16(event, 3, con_handle); 5191 reverse_bd_addr(address, &event[5]); 5192 event[11] = 1; // ACL connection 5193 event[12] = 0; // encryption disabled 5194 hci_emit_event(event, sizeof(event), 1); 5195 } 5196 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5197 if (disable_l2cap_timeouts) return; 5198 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5199 uint8_t event[4]; 5200 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5201 event[1] = sizeof(event) - 2; 5202 little_endian_store_16(event, 2, conn->con_handle); 5203 hci_emit_event(event, sizeof(event), 1); 5204 } 5205 #endif 5206 5207 #ifdef ENABLE_BLE 5208 #ifdef ENABLE_LE_CENTRAL 5209 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){ 5210 uint8_t event[21]; 5211 event[0] = HCI_EVENT_LE_META; 5212 event[1] = sizeof(event) - 2u; 5213 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5214 event[3] = status; 5215 little_endian_store_16(event, 4, con_handle); 5216 event[6] = 0; // TODO: role 5217 event[7] = address_type; 5218 reverse_bd_addr(address, &event[8]); 5219 little_endian_store_16(event, 14, 0); // interval 5220 little_endian_store_16(event, 16, 0); // latency 5221 little_endian_store_16(event, 18, 0); // supervision timeout 5222 event[20] = 0; // master clock accuracy 5223 hci_emit_event(event, sizeof(event), 1); 5224 } 5225 #endif 5226 #endif 5227 5228 static void hci_emit_transport_packet_sent(void){ 5229 // notify upper stack that it might be possible to send again 5230 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5231 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5232 } 5233 5234 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5235 uint8_t event[6]; 5236 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5237 event[1] = sizeof(event) - 2u; 5238 event[2] = 0; // status = OK 5239 little_endian_store_16(event, 3, con_handle); 5240 event[5] = reason; 5241 hci_emit_event(event, sizeof(event), 1); 5242 } 5243 5244 static void hci_emit_nr_connections_changed(void){ 5245 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5246 uint8_t event[3]; 5247 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5248 event[1] = sizeof(event) - 2u; 5249 event[2] = nr_hci_connections(); 5250 hci_emit_event(event, sizeof(event), 1); 5251 } 5252 5253 static void hci_emit_hci_open_failed(void){ 5254 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5255 uint8_t event[2]; 5256 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5257 event[1] = sizeof(event) - 2u; 5258 hci_emit_event(event, sizeof(event), 1); 5259 } 5260 5261 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5262 log_info("hci_emit_dedicated_bonding_result %u ", status); 5263 uint8_t event[9]; 5264 int pos = 0; 5265 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5266 event[pos++] = sizeof(event) - 2u; 5267 event[pos++] = status; 5268 reverse_bd_addr(address, &event[pos]); 5269 hci_emit_event(event, sizeof(event), 1); 5270 } 5271 5272 5273 #ifdef ENABLE_CLASSIC 5274 5275 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5276 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5277 uint8_t event[5]; 5278 int pos = 0; 5279 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5280 event[pos++] = sizeof(event) - 2; 5281 little_endian_store_16(event, 2, con_handle); 5282 pos += 2; 5283 event[pos++] = level; 5284 hci_emit_event(event, sizeof(event), 1); 5285 } 5286 5287 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5288 if (!connection) return LEVEL_0; 5289 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5290 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5291 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5292 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5293 // LEVEL 4 always requires 128 bit encrytion key size 5294 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5295 security_level = LEVEL_3; 5296 } 5297 return security_level; 5298 } 5299 5300 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5301 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5302 uint8_t event[3]; 5303 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5304 event[1] = sizeof(event) - 2; 5305 event[2] = enabled; 5306 hci_emit_event(event, sizeof(event), 1); 5307 } 5308 5309 // query if remote side supports eSCO 5310 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5311 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5312 if (!connection) return 0; 5313 return (connection->remote_supported_features[0] & 1) != 0; 5314 } 5315 5316 static bool hci_ssp_supported(hci_connection_t * connection){ 5317 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5318 return (connection->bonding_flags & mask) == mask; 5319 } 5320 5321 // query if remote side supports SSP 5322 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5323 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5324 if (!connection) return 0; 5325 return hci_ssp_supported(connection) ? 1 : 0; 5326 } 5327 5328 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5329 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5330 } 5331 5332 // GAP API 5333 /** 5334 * @bbrief enable/disable bonding. default is enabled 5335 * @praram enabled 5336 */ 5337 void gap_set_bondable_mode(int enable){ 5338 hci_stack->bondable = enable ? 1 : 0; 5339 } 5340 /** 5341 * @brief Get bondable mode. 5342 * @return 1 if bondable 5343 */ 5344 int gap_get_bondable_mode(void){ 5345 return hci_stack->bondable; 5346 } 5347 5348 /** 5349 * @brief map link keys to security levels 5350 */ 5351 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5352 switch (link_key_type){ 5353 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5354 return LEVEL_4; 5355 case COMBINATION_KEY: 5356 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5357 return LEVEL_3; 5358 default: 5359 return LEVEL_2; 5360 } 5361 } 5362 5363 /** 5364 * @brief map link keys to secure connection yes/no 5365 */ 5366 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5367 switch (link_key_type){ 5368 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5369 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5370 return 1; 5371 default: 5372 return 0; 5373 } 5374 } 5375 5376 /** 5377 * @brief map link keys to authenticated 5378 */ 5379 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5380 switch (link_key_type){ 5381 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5382 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5383 return 1; 5384 default: 5385 return 0; 5386 } 5387 } 5388 5389 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5390 log_info("gap_mitm_protection_required_for_security_level %u", level); 5391 return level > LEVEL_2; 5392 } 5393 5394 /** 5395 * @brief get current security level 5396 */ 5397 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5398 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5399 if (!connection) return LEVEL_0; 5400 return gap_security_level_for_connection(connection); 5401 } 5402 5403 /** 5404 * @brief request connection to device to 5405 * @result GAP_AUTHENTICATION_RESULT 5406 */ 5407 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5408 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5409 if (!connection){ 5410 hci_emit_security_level(con_handle, LEVEL_0); 5411 return; 5412 } 5413 5414 btstack_assert(hci_is_le_connection(connection) == false); 5415 5416 gap_security_level_t current_level = gap_security_level(con_handle); 5417 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5418 requested_level, connection->requested_security_level, current_level); 5419 5420 // authentication already active if planned level > 0 5421 if (connection->requested_security_level > LEVEL_0){ 5422 // authentication already active 5423 if (connection->requested_security_level < requested_level){ 5424 // increase requested level as new level is higher 5425 // TODO: handle re-authentication when done 5426 connection->requested_security_level = requested_level; 5427 } 5428 } else { 5429 // no request active, notify if security sufficient 5430 if (requested_level <= current_level){ 5431 hci_emit_security_level(con_handle, current_level); 5432 return; 5433 } 5434 5435 // store request 5436 connection->requested_security_level = requested_level; 5437 5438 // start to authenticate connection 5439 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5440 hci_run(); 5441 } 5442 } 5443 5444 /** 5445 * @brief start dedicated bonding with device. disconnect after bonding 5446 * @param device 5447 * @param request MITM protection 5448 * @result GAP_DEDICATED_BONDING_COMPLETE 5449 */ 5450 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5451 5452 // create connection state machine 5453 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5454 5455 if (!connection){ 5456 return BTSTACK_MEMORY_ALLOC_FAILED; 5457 } 5458 5459 // delete linkn key 5460 gap_drop_link_key_for_bd_addr(device); 5461 5462 // configure LEVEL_2/3, dedicated bonding 5463 connection->state = SEND_CREATE_CONNECTION; 5464 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5465 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5466 connection->bonding_flags = BONDING_DEDICATED; 5467 5468 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5469 5470 // handle: connnection failure (connection complete != ok) 5471 // handle: authentication failure 5472 // handle: disconnect on done 5473 5474 hci_run(); 5475 5476 return 0; 5477 } 5478 #endif 5479 5480 void gap_set_local_name(const char * local_name){ 5481 hci_stack->local_name = local_name; 5482 } 5483 5484 5485 #ifdef ENABLE_BLE 5486 5487 #ifdef ENABLE_LE_CENTRAL 5488 void gap_start_scan(void){ 5489 hci_stack->le_scanning_enabled = true; 5490 hci_run(); 5491 } 5492 5493 void gap_stop_scan(void){ 5494 hci_stack->le_scanning_enabled = false; 5495 hci_run(); 5496 } 5497 5498 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5499 hci_stack->le_scan_type = scan_type; 5500 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5501 hci_stack->le_scan_interval = scan_interval; 5502 hci_stack->le_scan_window = scan_window; 5503 hci_stack->le_scanning_param_update = true; 5504 hci_run(); 5505 } 5506 5507 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5508 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5509 } 5510 5511 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5512 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5513 if (!conn){ 5514 // disallow if le connection is already outgoing 5515 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5516 log_error("le connection already active"); 5517 return ERROR_CODE_COMMAND_DISALLOWED; 5518 } 5519 5520 log_info("gap_connect: no connection exists yet, creating context"); 5521 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5522 if (!conn){ 5523 // notify client that alloc failed 5524 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5525 log_info("gap_connect: failed to alloc hci_connection_t"); 5526 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5527 } 5528 5529 // set le connecting state 5530 if (hci_is_le_connection_type(addr_type)){ 5531 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5532 } 5533 5534 conn->state = SEND_CREATE_CONNECTION; 5535 log_info("gap_connect: send create connection next"); 5536 hci_run(); 5537 return ERROR_CODE_SUCCESS; 5538 } 5539 5540 if (!hci_is_le_connection(conn) || 5541 (conn->state == SEND_CREATE_CONNECTION) || 5542 (conn->state == SENT_CREATE_CONNECTION)) { 5543 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5544 log_error("gap_connect: classic connection or connect is already being created"); 5545 return GATT_CLIENT_IN_WRONG_STATE; 5546 } 5547 5548 // check if connection was just disconnected 5549 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5550 log_info("gap_connect: send create connection (again)"); 5551 conn->state = SEND_CREATE_CONNECTION; 5552 hci_run(); 5553 return ERROR_CODE_SUCCESS; 5554 } 5555 5556 log_info("gap_connect: context exists with state %u", conn->state); 5557 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5558 hci_run(); 5559 return ERROR_CODE_SUCCESS; 5560 } 5561 5562 // @assumption: only a single outgoing LE Connection exists 5563 static hci_connection_t * gap_get_outgoing_connection(void){ 5564 btstack_linked_item_t *it; 5565 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5566 hci_connection_t * conn = (hci_connection_t *) it; 5567 if (!hci_is_le_connection(conn)) continue; 5568 switch (conn->state){ 5569 case SEND_CREATE_CONNECTION: 5570 case SENT_CREATE_CONNECTION: 5571 case SENT_CANCEL_CONNECTION: 5572 return conn; 5573 default: 5574 break; 5575 }; 5576 } 5577 return NULL; 5578 } 5579 5580 uint8_t gap_connect_cancel(void){ 5581 hci_connection_t * conn = gap_get_outgoing_connection(); 5582 if (!conn) return 0; 5583 switch (conn->state){ 5584 case SEND_CREATE_CONNECTION: 5585 // skip sending create connection and emit event instead 5586 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5587 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5588 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5589 btstack_memory_hci_connection_free( conn ); 5590 break; 5591 case SENT_CREATE_CONNECTION: 5592 // request to send cancel connection 5593 conn->state = SEND_CANCEL_CONNECTION; 5594 hci_run(); 5595 break; 5596 default: 5597 break; 5598 } 5599 return 0; 5600 } 5601 #endif 5602 5603 #ifdef ENABLE_LE_CENTRAL 5604 /** 5605 * @brief Set connection parameters for outgoing connections 5606 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5607 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5608 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5609 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5610 * @param conn_latency, default: 4 5611 * @param supervision_timeout (unit: 10ms), default: 720 ms 5612 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5613 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5614 */ 5615 5616 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5617 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5618 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5619 hci_stack->le_connection_scan_interval = conn_scan_interval; 5620 hci_stack->le_connection_scan_window = conn_scan_window; 5621 hci_stack->le_connection_interval_min = conn_interval_min; 5622 hci_stack->le_connection_interval_max = conn_interval_max; 5623 hci_stack->le_connection_latency = conn_latency; 5624 hci_stack->le_supervision_timeout = supervision_timeout; 5625 hci_stack->le_minimum_ce_length = min_ce_length; 5626 hci_stack->le_maximum_ce_length = max_ce_length; 5627 } 5628 #endif 5629 5630 /** 5631 * @brief Updates the connection parameters for a given LE connection 5632 * @param handle 5633 * @param conn_interval_min (unit: 1.25ms) 5634 * @param conn_interval_max (unit: 1.25ms) 5635 * @param conn_latency 5636 * @param supervision_timeout (unit: 10ms) 5637 * @returns 0 if ok 5638 */ 5639 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5640 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5641 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5642 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5643 connection->le_conn_interval_min = conn_interval_min; 5644 connection->le_conn_interval_max = conn_interval_max; 5645 connection->le_conn_latency = conn_latency; 5646 connection->le_supervision_timeout = supervision_timeout; 5647 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5648 hci_run(); 5649 return 0; 5650 } 5651 5652 /** 5653 * @brief Request an update of the connection parameter for a given LE connection 5654 * @param handle 5655 * @param conn_interval_min (unit: 1.25ms) 5656 * @param conn_interval_max (unit: 1.25ms) 5657 * @param conn_latency 5658 * @param supervision_timeout (unit: 10ms) 5659 * @returns 0 if ok 5660 */ 5661 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5662 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5663 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5664 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5665 connection->le_conn_interval_min = conn_interval_min; 5666 connection->le_conn_interval_max = conn_interval_max; 5667 connection->le_conn_latency = conn_latency; 5668 connection->le_supervision_timeout = supervision_timeout; 5669 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5670 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5671 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5672 return 0; 5673 } 5674 5675 #ifdef ENABLE_LE_PERIPHERAL 5676 5677 /** 5678 * @brief Set Advertisement Data 5679 * @param advertising_data_length 5680 * @param advertising_data (max 31 octets) 5681 * @note data is not copied, pointer has to stay valid 5682 */ 5683 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5684 hci_stack->le_advertisements_data_len = advertising_data_length; 5685 hci_stack->le_advertisements_data = advertising_data; 5686 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5687 hci_run(); 5688 } 5689 5690 /** 5691 * @brief Set Scan Response Data 5692 * @param advertising_data_length 5693 * @param advertising_data (max 31 octets) 5694 * @note data is not copied, pointer has to stay valid 5695 */ 5696 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5697 hci_stack->le_scan_response_data_len = scan_response_data_length; 5698 hci_stack->le_scan_response_data = scan_response_data; 5699 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5700 hci_run(); 5701 } 5702 5703 /** 5704 * @brief Set Advertisement Parameters 5705 * @param adv_int_min 5706 * @param adv_int_max 5707 * @param adv_type 5708 * @param direct_address_type 5709 * @param direct_address 5710 * @param channel_map 5711 * @param filter_policy 5712 * 5713 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5714 */ 5715 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5716 uint8_t direct_address_typ, bd_addr_t direct_address, 5717 uint8_t channel_map, uint8_t filter_policy) { 5718 5719 hci_stack->le_advertisements_interval_min = adv_int_min; 5720 hci_stack->le_advertisements_interval_max = adv_int_max; 5721 hci_stack->le_advertisements_type = adv_type; 5722 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5723 hci_stack->le_advertisements_channel_map = channel_map; 5724 hci_stack->le_advertisements_filter_policy = filter_policy; 5725 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5726 6); 5727 5728 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 5729 hci_run(); 5730 } 5731 5732 /** 5733 * @brief Enable/Disable Advertisements 5734 * @param enabled 5735 */ 5736 void gap_advertisements_enable(int enabled){ 5737 hci_stack->le_advertisements_enabled = enabled != 0; 5738 hci_update_advertisements_enabled_for_current_roles(); 5739 hci_run(); 5740 } 5741 5742 #endif 5743 5744 void hci_le_set_own_address_type(uint8_t own_address_type){ 5745 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5746 if (own_address_type == hci_stack->le_own_addr_type) return; 5747 hci_stack->le_own_addr_type = own_address_type; 5748 5749 #ifdef ENABLE_LE_PERIPHERAL 5750 // update advertisement parameters, too 5751 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5752 hci_run(); 5753 #endif 5754 #ifdef ENABLE_LE_CENTRAL 5755 // note: we don't update scan parameters or modify ongoing connection attempts 5756 #endif 5757 } 5758 5759 #endif 5760 5761 uint8_t gap_disconnect(hci_con_handle_t handle){ 5762 hci_connection_t * conn = hci_connection_for_handle(handle); 5763 if (!conn){ 5764 hci_emit_disconnection_complete(handle, 0); 5765 return 0; 5766 } 5767 // ignore if already disconnected 5768 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5769 return 0; 5770 } 5771 conn->state = SEND_DISCONNECT; 5772 hci_run(); 5773 return 0; 5774 } 5775 5776 int gap_read_rssi(hci_con_handle_t con_handle){ 5777 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5778 if (hci_connection == NULL) return 0; 5779 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5780 hci_run(); 5781 return 1; 5782 } 5783 5784 /** 5785 * @brief Get connection type 5786 * @param con_handle 5787 * @result connection_type 5788 */ 5789 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5790 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5791 if (!conn) return GAP_CONNECTION_INVALID; 5792 switch (conn->address_type){ 5793 case BD_ADDR_TYPE_LE_PUBLIC: 5794 case BD_ADDR_TYPE_LE_RANDOM: 5795 return GAP_CONNECTION_LE; 5796 case BD_ADDR_TYPE_SCO: 5797 return GAP_CONNECTION_SCO; 5798 case BD_ADDR_TYPE_ACL: 5799 return GAP_CONNECTION_ACL; 5800 default: 5801 return GAP_CONNECTION_INVALID; 5802 } 5803 } 5804 5805 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5806 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5807 if (!conn) return HCI_ROLE_INVALID; 5808 return (hci_role_t) conn->role; 5809 } 5810 5811 5812 #ifdef ENABLE_CLASSIC 5813 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5814 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5815 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5816 conn->request_role = role; 5817 hci_run(); 5818 return ERROR_CODE_SUCCESS; 5819 } 5820 #endif 5821 5822 #ifdef ENABLE_BLE 5823 5824 uint8_t gap_le_set_phy(hci_con_handle_t connection_handle, uint8_t all_phys, uint8_t tx_phys, uint8_t rx_phys, uint8_t phy_options){ 5825 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5826 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5827 5828 conn->le_phy_update_all_phys = all_phys; 5829 conn->le_phy_update_tx_phys = tx_phys; 5830 conn->le_phy_update_rx_phys = rx_phys; 5831 conn->le_phy_update_phy_options = phy_options; 5832 5833 hci_run(); 5834 5835 return 0; 5836 } 5837 5838 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5839 // check if already in list 5840 btstack_linked_list_iterator_t it; 5841 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5842 while (btstack_linked_list_iterator_has_next(&it)) { 5843 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5844 if (entry->address_type != address_type) { 5845 continue; 5846 } 5847 if (memcmp(entry->address, address, 6) != 0) { 5848 continue; 5849 } 5850 // disallow if already scheduled to add 5851 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5852 return ERROR_CODE_COMMAND_DISALLOWED; 5853 } 5854 // still on controller, but scheduled to remove -> re-add 5855 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5856 return ERROR_CODE_SUCCESS; 5857 } 5858 // alloc and add to list 5859 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5860 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5861 entry->address_type = address_type; 5862 (void)memcpy(entry->address, address, 6); 5863 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5864 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5865 return ERROR_CODE_SUCCESS; 5866 } 5867 5868 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5869 btstack_linked_list_iterator_t it; 5870 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5871 while (btstack_linked_list_iterator_has_next(&it)){ 5872 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5873 if (entry->address_type != address_type) { 5874 continue; 5875 } 5876 if (memcmp(entry->address, address, 6) != 0) { 5877 continue; 5878 } 5879 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5880 // remove from controller if already present 5881 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5882 } else { 5883 // directly remove entry from whitelist 5884 btstack_linked_list_iterator_remove(&it); 5885 btstack_memory_whitelist_entry_free(entry); 5886 } 5887 return ERROR_CODE_SUCCESS; 5888 } 5889 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5890 } 5891 5892 static void hci_whitelist_clear(void){ 5893 btstack_linked_list_iterator_t it; 5894 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5895 while (btstack_linked_list_iterator_has_next(&it)){ 5896 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5897 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5898 // remove from controller if already present 5899 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5900 continue; 5901 } 5902 // directly remove entry from whitelist 5903 btstack_linked_list_iterator_remove(&it); 5904 btstack_memory_whitelist_entry_free(entry); 5905 } 5906 } 5907 5908 /** 5909 * @brief Clear Whitelist 5910 * @returns 0 if ok 5911 */ 5912 uint8_t gap_whitelist_clear(void){ 5913 hci_whitelist_clear(); 5914 hci_run(); 5915 return ERROR_CODE_SUCCESS; 5916 } 5917 5918 /** 5919 * @brief Add Device to Whitelist 5920 * @param address_typ 5921 * @param address 5922 * @returns 0 if ok 5923 */ 5924 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5925 uint8_t status = hci_whitelist_add(address_type, address); 5926 if (status){ 5927 return status; 5928 } 5929 hci_run(); 5930 return ERROR_CODE_SUCCESS; 5931 } 5932 5933 /** 5934 * @brief Remove Device from Whitelist 5935 * @param address_typ 5936 * @param address 5937 * @returns 0 if ok 5938 */ 5939 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5940 uint8_t status = hci_whitelist_remove(address_type, address); 5941 if (status){ 5942 return status; 5943 } 5944 hci_run(); 5945 return ERROR_CODE_SUCCESS; 5946 } 5947 5948 #ifdef ENABLE_LE_CENTRAL 5949 /** 5950 * @brief Connect with Whitelist 5951 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 5952 * @returns - if ok 5953 */ 5954 uint8_t gap_connect_with_whitelist(void){ 5955 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5956 return ERROR_CODE_COMMAND_DISALLOWED; 5957 } 5958 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5959 hci_run(); 5960 return ERROR_CODE_SUCCESS; 5961 } 5962 5963 /** 5964 * @brief Auto Connection Establishment - Start Connecting to device 5965 * @param address_typ 5966 * @param address 5967 * @returns 0 if ok 5968 */ 5969 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 5970 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5971 return ERROR_CODE_COMMAND_DISALLOWED; 5972 } 5973 5974 uint8_t status = hci_whitelist_add(address_type, address); 5975 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 5976 return status; 5977 } 5978 5979 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5980 5981 hci_run(); 5982 return ERROR_CODE_SUCCESS; 5983 } 5984 5985 /** 5986 * @brief Auto Connection Establishment - Stop Connecting to device 5987 * @param address_typ 5988 * @param address 5989 * @returns 0 if ok 5990 */ 5991 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 5992 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5993 return ERROR_CODE_COMMAND_DISALLOWED; 5994 } 5995 5996 hci_whitelist_remove(address_type, address); 5997 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 5998 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5999 } 6000 hci_run(); 6001 return 0; 6002 } 6003 6004 /** 6005 * @brief Auto Connection Establishment - Stop everything 6006 * @note Convenience function to stop all active auto connection attempts 6007 */ 6008 uint8_t gap_auto_connection_stop_all(void){ 6009 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6010 return ERROR_CODE_COMMAND_DISALLOWED; 6011 } 6012 hci_whitelist_clear(); 6013 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6014 hci_run(); 6015 return ERROR_CODE_SUCCESS; 6016 } 6017 6018 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 6019 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6020 if (!conn) return 0; 6021 return conn->le_connection_interval; 6022 } 6023 #endif 6024 #endif 6025 6026 #ifdef ENABLE_CLASSIC 6027 /** 6028 * @brief Set Extended Inquiry Response data 6029 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6030 * @note has to be done before stack starts up 6031 */ 6032 void gap_set_extended_inquiry_response(const uint8_t * data){ 6033 hci_stack->eir_data = data; 6034 } 6035 6036 /** 6037 * @brief Start GAP Classic Inquiry 6038 * @param duration in 1.28s units 6039 * @return 0 if ok 6040 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6041 */ 6042 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6043 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6044 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6045 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6046 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6047 } 6048 hci_stack->inquiry_state = duration_in_1280ms_units; 6049 hci_run(); 6050 return 0; 6051 } 6052 6053 /** 6054 * @brief Stop GAP Classic Inquiry 6055 * @returns 0 if ok 6056 */ 6057 int gap_inquiry_stop(void){ 6058 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6059 // emit inquiry complete event, before it even started 6060 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6061 hci_emit_event(event, sizeof(event), 1); 6062 return 0; 6063 } 6064 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6065 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6066 hci_run(); 6067 return 0; 6068 } 6069 6070 void gap_inquiry_set_lap(uint32_t lap){ 6071 hci_stack->inquiry_lap = lap; 6072 } 6073 6074 6075 /** 6076 * @brief Remote Name Request 6077 * @param addr 6078 * @param page_scan_repetition_mode 6079 * @param clock_offset only used when bit 15 is set 6080 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6081 */ 6082 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6083 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6084 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6085 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6086 hci_stack->remote_name_clock_offset = clock_offset; 6087 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6088 hci_run(); 6089 return 0; 6090 } 6091 6092 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6093 hci_stack->gap_pairing_state = state; 6094 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6095 hci_run(); 6096 return 0; 6097 } 6098 6099 /** 6100 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6101 * @param addr 6102 * @param pin_data 6103 * @param pin_len 6104 * @return 0 if ok 6105 */ 6106 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6107 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6108 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6109 hci_stack->gap_pairing_pin_len = pin_len; 6110 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6111 } 6112 6113 /** 6114 * @brief Legacy Pairing Pin Code Response 6115 * @param addr 6116 * @param pin 6117 * @return 0 if ok 6118 */ 6119 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6120 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6121 } 6122 6123 /** 6124 * @brief Abort Legacy Pairing 6125 * @param addr 6126 * @param pin 6127 * @return 0 if ok 6128 */ 6129 int gap_pin_code_negative(bd_addr_t addr){ 6130 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6131 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6132 } 6133 6134 /** 6135 * @brief SSP Passkey Response 6136 * @param addr 6137 * @param passkey 6138 * @return 0 if ok 6139 */ 6140 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6141 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6142 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6143 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6144 } 6145 6146 /** 6147 * @brief Abort SSP Passkey Entry/Pairing 6148 * @param addr 6149 * @param pin 6150 * @return 0 if ok 6151 */ 6152 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6153 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6154 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6155 } 6156 6157 /** 6158 * @brief Accept SSP Numeric Comparison 6159 * @param addr 6160 * @param passkey 6161 * @return 0 if ok 6162 */ 6163 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6164 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6165 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6166 } 6167 6168 /** 6169 * @brief Abort SSP Numeric Comparison/Pairing 6170 * @param addr 6171 * @param pin 6172 * @return 0 if ok 6173 */ 6174 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6175 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6176 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6177 } 6178 6179 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6180 6181 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6182 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6183 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6184 connectionSetAuthenticationFlags(conn, flag); 6185 hci_run(); 6186 return ERROR_CODE_SUCCESS; 6187 } 6188 6189 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6190 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_REPLY); 6191 } 6192 6193 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6194 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6195 } 6196 #endif 6197 6198 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6199 /** 6200 * @brief Report Remote OOB Data 6201 * @param bd_addr 6202 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6203 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6204 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6205 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6206 */ 6207 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){ 6208 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6209 if (connection == NULL) { 6210 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6211 } 6212 connection->classic_oob_c_192 = c_192; 6213 connection->classic_oob_r_192 = r_192; 6214 connection->classic_oob_c_256 = c_256; 6215 connection->classic_oob_r_256 = r_256; 6216 return ERROR_CODE_SUCCESS; 6217 } 6218 /** 6219 * @brief Generate new OOB data 6220 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6221 */ 6222 void gap_ssp_generate_oob_data(void){ 6223 hci_stack->classic_read_local_oob_data = true; 6224 hci_run(); 6225 } 6226 6227 #endif 6228 6229 /** 6230 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6231 * @param inquiry_mode see bluetooth_defines.h 6232 */ 6233 void hci_set_inquiry_mode(inquiry_mode_t mode){ 6234 hci_stack->inquiry_mode = mode; 6235 } 6236 6237 /** 6238 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6239 */ 6240 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6241 hci_stack->sco_voice_setting = voice_setting; 6242 } 6243 6244 /** 6245 * @brief Get SCO Voice Setting 6246 * @return current voice setting 6247 */ 6248 uint16_t hci_get_sco_voice_setting(void){ 6249 return hci_stack->sco_voice_setting; 6250 } 6251 6252 static int hci_have_usb_transport(void){ 6253 if (!hci_stack->hci_transport) return 0; 6254 const char * transport_name = hci_stack->hci_transport->name; 6255 if (!transport_name) return 0; 6256 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6257 } 6258 6259 /** @brief Get SCO packet length for current SCO Voice setting 6260 * @note Using SCO packets of the exact length is required for USB transfer 6261 * @return Length of SCO packets in bytes (not audio frames) 6262 */ 6263 int hci_get_sco_packet_length(void){ 6264 int sco_packet_length = 0; 6265 6266 #ifdef ENABLE_SCO_OVER_HCI 6267 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6268 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6269 6270 if (hci_have_usb_transport()){ 6271 // see Core Spec for H2 USB Transfer. 6272 // 3 byte SCO header + 24 bytes per connection 6273 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6274 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6275 } else { 6276 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6277 sco_packet_length = 3 + 60 * multiplier; 6278 // assert that it still fits inside an SCO buffer 6279 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6280 sco_packet_length = 3 + 60; 6281 } 6282 } 6283 #endif 6284 6285 #ifdef HAVE_SCO_TRANSPORT 6286 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6287 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6288 sco_packet_length = 3 + 60 * multiplier; 6289 #endif 6290 return sco_packet_length; 6291 } 6292 6293 /** 6294 * @brief Sets the master/slave policy 6295 * @param policy (0: attempt to become master, 1: let connecting device decide) 6296 */ 6297 void hci_set_master_slave_policy(uint8_t policy){ 6298 hci_stack->master_slave_policy = policy; 6299 } 6300 6301 #endif 6302 6303 HCI_STATE hci_get_state(void){ 6304 return hci_stack->state; 6305 } 6306 6307 #ifdef ENABLE_CLASSIC 6308 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6309 hci_stack->gap_classic_accept_callback = accept_callback; 6310 } 6311 #endif 6312 6313 /** 6314 * @brief Set callback for Bluetooth Hardware Error 6315 */ 6316 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6317 hci_stack->hardware_error_callback = fn; 6318 } 6319 6320 void hci_disconnect_all(void){ 6321 btstack_linked_list_iterator_t it; 6322 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6323 while (btstack_linked_list_iterator_has_next(&it)){ 6324 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6325 if (con->state == SENT_DISCONNECT) continue; 6326 con->state = SEND_DISCONNECT; 6327 } 6328 hci_run(); 6329 } 6330 6331 uint16_t hci_get_manufacturer(void){ 6332 return hci_stack->manufacturer; 6333 } 6334 6335 #ifdef ENABLE_BLE 6336 6337 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6338 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6339 if (!hci_con) return NULL; 6340 return &hci_con->sm_connection; 6341 } 6342 6343 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6344 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6345 6346 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6347 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6348 if (hci_connection == NULL) return 0; 6349 if (hci_is_le_connection(hci_connection)){ 6350 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6351 if (sm_conn->sm_connection_encrypted) { 6352 return sm_conn->sm_actual_encryption_key_size; 6353 } 6354 } 6355 #ifdef ENABLE_CLASSIC 6356 else { 6357 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 6358 return hci_connection->encryption_key_size; 6359 } 6360 } 6361 #endif 6362 return 0; 6363 } 6364 6365 int gap_authenticated(hci_con_handle_t con_handle){ 6366 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6367 if (hci_connection == NULL) return 0; 6368 6369 switch (hci_connection->address_type){ 6370 case BD_ADDR_TYPE_LE_PUBLIC: 6371 case BD_ADDR_TYPE_LE_RANDOM: 6372 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6373 return hci_connection->sm_connection.sm_connection_authenticated; 6374 #ifdef ENABLE_CLASSIC 6375 case BD_ADDR_TYPE_SCO: 6376 case BD_ADDR_TYPE_ACL: 6377 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6378 #endif 6379 default: 6380 return 0; 6381 } 6382 } 6383 6384 int gap_secure_connection(hci_con_handle_t con_handle){ 6385 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6386 if (hci_connection == NULL) return 0; 6387 6388 switch (hci_connection->address_type){ 6389 case BD_ADDR_TYPE_LE_PUBLIC: 6390 case BD_ADDR_TYPE_LE_RANDOM: 6391 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6392 return hci_connection->sm_connection.sm_connection_sc; 6393 #ifdef ENABLE_CLASSIC 6394 case BD_ADDR_TYPE_SCO: 6395 case BD_ADDR_TYPE_ACL: 6396 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6397 #endif 6398 default: 6399 return 0; 6400 } 6401 } 6402 6403 bool gap_bonded(hci_con_handle_t con_handle){ 6404 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6405 if (hci_connection == NULL) return 0; 6406 6407 #ifdef ENABLE_CLASSIC 6408 link_key_t link_key; 6409 link_key_type_t link_key_type; 6410 #endif 6411 switch (hci_connection->address_type){ 6412 case BD_ADDR_TYPE_LE_PUBLIC: 6413 case BD_ADDR_TYPE_LE_RANDOM: 6414 return hci_connection->sm_connection.sm_le_db_index >= 0; 6415 #ifdef ENABLE_CLASSIC 6416 case BD_ADDR_TYPE_SCO: 6417 case BD_ADDR_TYPE_ACL: 6418 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6419 #endif 6420 default: 6421 return false; 6422 } 6423 } 6424 6425 6426 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6427 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6428 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6429 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6430 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6431 return sm_conn->sm_connection_authorization_state; 6432 } 6433 #endif 6434 6435 #ifdef ENABLE_CLASSIC 6436 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){ 6437 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6438 if (!conn) return GAP_CONNECTION_INVALID; 6439 conn->sniff_min_interval = sniff_min_interval; 6440 conn->sniff_max_interval = sniff_max_interval; 6441 conn->sniff_attempt = sniff_attempt; 6442 conn->sniff_timeout = sniff_timeout; 6443 hci_run(); 6444 return 0; 6445 } 6446 6447 /** 6448 * @brief Exit Sniff mode 6449 * @param con_handle 6450 @ @return 0 if ok 6451 */ 6452 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6453 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6454 if (!conn) return GAP_CONNECTION_INVALID; 6455 conn->sniff_min_interval = 0xffff; 6456 hci_run(); 6457 return 0; 6458 } 6459 6460 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){ 6461 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6462 if (!conn) return GAP_CONNECTION_INVALID; 6463 conn->sniff_subrating_max_latency = max_latency; 6464 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6465 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6466 hci_run(); 6467 return ERROR_CODE_SUCCESS; 6468 } 6469 6470 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){ 6471 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6472 if (!conn) return GAP_CONNECTION_INVALID; 6473 conn->qos_service_type = service_type; 6474 conn->qos_token_rate = token_rate; 6475 conn->qos_peak_bandwidth = peak_bandwidth; 6476 conn->qos_latency = latency; 6477 conn->qos_delay_variation = delay_variation; 6478 hci_run(); 6479 return ERROR_CODE_SUCCESS; 6480 } 6481 6482 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6483 hci_stack->new_page_scan_interval = page_scan_interval; 6484 hci_stack->new_page_scan_window = page_scan_window; 6485 hci_run(); 6486 } 6487 6488 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6489 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6490 hci_run(); 6491 } 6492 6493 #endif 6494 6495 void hci_halting_defer(void){ 6496 if (hci_stack->state != HCI_STATE_HALTING) return; 6497 switch (hci_stack->substate){ 6498 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6499 case HCI_HALTING_CLOSE: 6500 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6501 break; 6502 default: 6503 break; 6504 } 6505 } 6506 6507 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6508 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6509 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6510 if (le_device_db_index >= le_device_db_max_count()) return; 6511 uint8_t offset = le_device_db_index >> 3; 6512 uint8_t mask = 1 << (le_device_db_index & 7); 6513 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6514 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6515 // note: go back to remove entries, otherwise, a remove + add will skip the add 6516 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6517 } 6518 } 6519 6520 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6521 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6522 if (le_device_db_index >= le_device_db_max_count()) return; 6523 uint8_t offset = le_device_db_index >> 3; 6524 uint8_t mask = 1 << (le_device_db_index & 7); 6525 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6526 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6527 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6528 } 6529 } 6530 6531 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6532 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6533 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6534 } 6535 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6536 // restart le resolving list update 6537 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6538 } 6539 return ERROR_CODE_SUCCESS; 6540 } 6541 #endif 6542 6543 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6544 void hci_setup_test_connections_fuzz(void){ 6545 hci_connection_t * conn; 6546 6547 // default address: 66:55:44:33:00:01 6548 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6549 6550 // setup Controller info 6551 hci_stack->num_cmd_packets = 255; 6552 hci_stack->acl_packets_total_num = 255; 6553 6554 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6555 addr[5] = 0x01; 6556 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6557 conn->con_handle = addr[5]; 6558 conn->role = HCI_ROLE_SLAVE; 6559 conn->state = RECEIVED_CONNECTION_REQUEST; 6560 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6561 6562 // setup incoming Classic SCO connection with con handle 0x0002 6563 addr[5] = 0x02; 6564 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6565 conn->con_handle = addr[5]; 6566 conn->role = HCI_ROLE_SLAVE; 6567 conn->state = RECEIVED_CONNECTION_REQUEST; 6568 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6569 6570 // setup ready Classic ACL connection with con handle 0x0003 6571 addr[5] = 0x03; 6572 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6573 conn->con_handle = addr[5]; 6574 conn->role = HCI_ROLE_SLAVE; 6575 conn->state = OPEN; 6576 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6577 6578 // setup ready Classic SCO connection with con handle 0x0004 6579 addr[5] = 0x04; 6580 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6581 conn->con_handle = addr[5]; 6582 conn->role = HCI_ROLE_SLAVE; 6583 conn->state = OPEN; 6584 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6585 6586 // setup ready LE ACL connection with con handle 0x005 and public address 6587 addr[5] = 0x05; 6588 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6589 conn->con_handle = addr[5]; 6590 conn->role = HCI_ROLE_SLAVE; 6591 conn->state = OPEN; 6592 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6593 conn->sm_connection.sm_connection_encrypted = 1; 6594 } 6595 6596 void hci_free_connections_fuzz(void){ 6597 btstack_linked_list_iterator_t it; 6598 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6599 while (btstack_linked_list_iterator_has_next(&it)){ 6600 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6601 btstack_linked_list_iterator_remove(&it); 6602 btstack_memory_hci_connection_free(con); 6603 } 6604 } 6605 void hci_simulate_working_fuzz(void){ 6606 hci_init_done(); 6607 hci_stack->num_cmd_packets = 255; 6608 } 6609 #endif 6610