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 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2043 return; 2044 } 2045 2046 // Request Authentication if not already done 2047 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2048 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2049 } 2050 #endif 2051 2052 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2053 UNUSED(size); 2054 2055 uint16_t manufacturer; 2056 #ifdef ENABLE_CLASSIC 2057 hci_con_handle_t handle; 2058 hci_connection_t * conn; 2059 uint8_t status; 2060 #endif 2061 // get num cmd packets - limit to 1 to reduce complexity 2062 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2063 2064 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2065 switch (opcode){ 2066 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2067 if (packet[5]) break; 2068 // terminate, name 248 chars 2069 packet[6+248] = 0; 2070 log_info("local name: %s", &packet[6]); 2071 break; 2072 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2073 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2074 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2075 uint16_t acl_len = little_endian_read_16(packet, 6); 2076 uint16_t sco_len = packet[8]; 2077 2078 // determine usable ACL/SCO payload size 2079 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2080 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2081 2082 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2083 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2084 2085 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2086 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2087 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2088 } 2089 break; 2090 case HCI_OPCODE_HCI_READ_RSSI: 2091 if (packet[5] == ERROR_CODE_SUCCESS){ 2092 uint8_t event[5]; 2093 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2094 event[1] = 3; 2095 (void)memcpy(&event[2], &packet[6], 3); 2096 hci_emit_event(event, sizeof(event), 1); 2097 } 2098 break; 2099 #ifdef ENABLE_BLE 2100 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2101 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2102 hci_stack->le_acl_packets_total_num = packet[8]; 2103 // determine usable ACL payload size 2104 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2105 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2106 } 2107 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2108 break; 2109 #endif 2110 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2111 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2112 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2113 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2114 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); 2115 break; 2116 #endif 2117 #ifdef ENABLE_LE_CENTRAL 2118 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2119 hci_stack->le_whitelist_capacity = packet[6]; 2120 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2121 break; 2122 #endif 2123 case HCI_OPCODE_HCI_READ_BD_ADDR: 2124 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2125 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)); 2126 #ifdef ENABLE_CLASSIC 2127 if (hci_stack->link_key_db){ 2128 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2129 } 2130 #endif 2131 break; 2132 #ifdef ENABLE_CLASSIC 2133 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2134 hci_emit_discoverable_enabled(hci_stack->discoverable); 2135 break; 2136 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2137 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2138 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2139 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2140 hci_emit_event(event, sizeof(event), 1); 2141 } 2142 break; 2143 #endif 2144 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2145 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2146 2147 #ifdef ENABLE_CLASSIC 2148 // determine usable ACL packet types based on host buffer size and supported features 2149 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2150 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2151 #endif 2152 // Classic/LE 2153 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2154 break; 2155 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2156 manufacturer = little_endian_read_16(packet, 10); 2157 // map Cypress to Broadcom 2158 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2159 log_info("Treat Cypress as Broadcom"); 2160 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2161 little_endian_store_16(packet, 10, manufacturer); 2162 } 2163 hci_stack->manufacturer = manufacturer; 2164 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2165 break; 2166 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2167 hci_stack->local_supported_commands[0] = 2168 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2169 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2170 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2171 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2172 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2173 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2174 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2175 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2176 hci_stack->local_supported_commands[1] = 2177 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2178 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2179 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2180 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2181 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2182 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2183 break; 2184 #ifdef ENABLE_CLASSIC 2185 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2186 if (packet[5]) return; 2187 hci_stack->synchronous_flow_control_enabled = 1; 2188 break; 2189 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2190 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2191 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2192 conn = hci_connection_for_handle(handle); 2193 if (conn != NULL) { 2194 uint8_t key_size = 0; 2195 if (status == 0){ 2196 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2197 log_info("Handle %04x key Size: %u", handle, key_size); 2198 } else { 2199 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2200 } 2201 hci_handle_read_encryption_key_size_complete(conn, key_size); 2202 } 2203 break; 2204 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2205 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2206 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2207 uint8_t event[67]; 2208 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2209 event[1] = 65; 2210 (void)memset(&event[2], 0, 65); 2211 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2212 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2213 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2214 event[2] = 3; 2215 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2216 } else { 2217 event[2] = 1; 2218 } 2219 } 2220 hci_emit_event(event, sizeof(event), 0); 2221 break; 2222 } 2223 #endif 2224 #endif 2225 default: 2226 break; 2227 } 2228 } 2229 2230 #ifdef ENABLE_BLE 2231 static void event_handle_le_connection_complete(const uint8_t * packet){ 2232 bd_addr_t addr; 2233 bd_addr_type_t addr_type; 2234 hci_connection_t * conn; 2235 2236 // Connection management 2237 reverse_bd_addr(&packet[8], addr); 2238 addr_type = (bd_addr_type_t)packet[7]; 2239 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2240 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2241 2242 #ifdef ENABLE_LE_CENTRAL 2243 // handle error: error is reported only to the initiator -> outgoing connection 2244 if (packet[3]){ 2245 2246 // handle cancelled outgoing connection 2247 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2248 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2249 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2250 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2251 // reset state 2252 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2253 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2254 // get outgoing connection conn struct for direct connect 2255 conn = gap_get_outgoing_connection(); 2256 } 2257 2258 // outgoing le connection establishment is done 2259 if (conn){ 2260 // remove entry 2261 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2262 btstack_memory_hci_connection_free( conn ); 2263 } 2264 return; 2265 } 2266 #endif 2267 2268 // on success, both hosts receive connection complete event 2269 if (packet[6] == HCI_ROLE_MASTER){ 2270 #ifdef ENABLE_LE_CENTRAL 2271 // if we're master on an le connection, it was an outgoing connection and we're done with it 2272 // note: no hci_connection_t object exists yet for connect with whitelist 2273 if (hci_is_le_connection_type(addr_type)){ 2274 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2275 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2276 } 2277 #endif 2278 } else { 2279 #ifdef ENABLE_LE_PERIPHERAL 2280 // if we're slave, it was an incoming connection, advertisements have stopped 2281 hci_stack->le_advertisements_active = false; 2282 #endif 2283 } 2284 2285 // LE connections are auto-accepted, so just create a connection if there isn't one already 2286 if (!conn){ 2287 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2288 } 2289 2290 // no memory, sorry. 2291 if (!conn){ 2292 return; 2293 } 2294 2295 conn->state = OPEN; 2296 conn->role = packet[6]; 2297 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2298 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2299 2300 #ifdef ENABLE_LE_PERIPHERAL 2301 if (packet[6] == HCI_ROLE_SLAVE){ 2302 hci_update_advertisements_enabled_for_current_roles(); 2303 } 2304 #endif 2305 2306 // init unenhanced att bearer mtu 2307 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2308 conn->att_connection.mtu_exchanged = false; 2309 2310 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2311 2312 // restart timer 2313 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2314 // btstack_run_loop_add_timer(&conn->timeout); 2315 2316 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2317 2318 hci_emit_nr_connections_changed(); 2319 } 2320 #endif 2321 2322 static void event_handler(uint8_t *packet, uint16_t size){ 2323 2324 uint16_t event_length = packet[1]; 2325 2326 // assert packet is complete 2327 if (size != (event_length + 2u)){ 2328 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2329 return; 2330 } 2331 2332 bd_addr_type_t addr_type; 2333 hci_con_handle_t handle; 2334 hci_connection_t * conn; 2335 int i; 2336 int create_connection_cmd; 2337 2338 #ifdef ENABLE_CLASSIC 2339 hci_link_type_t link_type; 2340 bd_addr_t addr; 2341 #endif 2342 2343 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2344 2345 switch (hci_event_packet_get_type(packet)) { 2346 2347 case HCI_EVENT_COMMAND_COMPLETE: 2348 handle_command_complete_event(packet, size); 2349 break; 2350 2351 case HCI_EVENT_COMMAND_STATUS: 2352 // get num cmd packets - limit to 1 to reduce complexity 2353 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2354 2355 // check command status to detected failed outgoing connections 2356 create_connection_cmd = 0; 2357 #ifdef ENABLE_CLASSIC 2358 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2359 create_connection_cmd = 1; 2360 } 2361 #endif 2362 #ifdef ENABLE_LE_CENTRAL 2363 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2364 create_connection_cmd = 1; 2365 } 2366 #endif 2367 if (create_connection_cmd) { 2368 uint8_t status = hci_event_command_status_get_status(packet); 2369 addr_type = hci_stack->outgoing_addr_type; 2370 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2371 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); 2372 2373 // reset outgoing address info 2374 memset(hci_stack->outgoing_addr, 0, 6); 2375 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2376 2377 // on error 2378 if (status != ERROR_CODE_SUCCESS){ 2379 #ifdef ENABLE_LE_CENTRAL 2380 if (hci_is_le_connection_type(addr_type)){ 2381 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2382 } 2383 #endif 2384 // error => outgoing connection failed 2385 if (conn != NULL){ 2386 hci_handle_connection_failed(conn, status); 2387 } 2388 } 2389 } 2390 2391 #ifdef ENABLE_CLASSIC 2392 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2393 uint8_t status = hci_event_command_status_get_status(packet); 2394 log_info("command status (inquiry), status %x", status); 2395 if (status == ERROR_CODE_SUCCESS) { 2396 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2397 } else { 2398 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2399 } 2400 } 2401 #endif 2402 break; 2403 2404 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2405 if (size < 3) return; 2406 uint16_t num_handles = packet[2]; 2407 if (size != (3u + num_handles * 4u)) return; 2408 uint16_t offset = 3; 2409 for (i=0; i<num_handles;i++){ 2410 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2411 offset += 2u; 2412 uint16_t num_packets = little_endian_read_16(packet, offset); 2413 offset += 2u; 2414 2415 conn = hci_connection_for_handle(handle); 2416 if (!conn){ 2417 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2418 continue; 2419 } 2420 2421 if (conn->num_packets_sent >= num_packets){ 2422 conn->num_packets_sent -= num_packets; 2423 } else { 2424 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2425 conn->num_packets_sent = 0; 2426 } 2427 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2428 2429 #ifdef ENABLE_CLASSIC 2430 // For SCO, we do the can_send_now_check here 2431 hci_notify_if_sco_can_send_now(); 2432 #endif 2433 } 2434 break; 2435 } 2436 2437 #ifdef ENABLE_CLASSIC 2438 case HCI_EVENT_INQUIRY_COMPLETE: 2439 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2440 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2441 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2442 hci_emit_event(event, sizeof(event), 1); 2443 } 2444 break; 2445 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2446 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2447 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2448 } 2449 break; 2450 case HCI_EVENT_CONNECTION_REQUEST: 2451 reverse_bd_addr(&packet[2], addr); 2452 link_type = (hci_link_type_t) packet[11]; 2453 if (hci_stack->gap_classic_accept_callback != NULL){ 2454 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2455 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2456 bd_addr_copy(hci_stack->decline_addr, addr); 2457 break; 2458 } 2459 } 2460 2461 // TODO: eval COD 8-10 2462 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2463 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2464 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2465 if (!conn) { 2466 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2467 } 2468 if (!conn) { 2469 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2470 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2471 bd_addr_copy(hci_stack->decline_addr, addr); 2472 break; 2473 } 2474 conn->role = HCI_ROLE_SLAVE; 2475 conn->state = RECEIVED_CONNECTION_REQUEST; 2476 // store info about eSCO 2477 if (link_type == HCI_LINK_TYPE_ESCO){ 2478 conn->remote_supported_features[0] |= 1; 2479 } 2480 hci_run(); 2481 break; 2482 2483 case HCI_EVENT_CONNECTION_COMPLETE: 2484 // Connection management 2485 reverse_bd_addr(&packet[5], addr); 2486 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2487 addr_type = BD_ADDR_TYPE_ACL; 2488 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2489 if (conn) { 2490 if (!packet[2]){ 2491 conn->state = OPEN; 2492 conn->con_handle = little_endian_read_16(packet, 3); 2493 2494 // queue get remote feature 2495 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2496 2497 // queue set supervision timeout if we're master 2498 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2499 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2500 } 2501 2502 // restart timer 2503 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2504 btstack_run_loop_add_timer(&conn->timeout); 2505 2506 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2507 2508 hci_emit_nr_connections_changed(); 2509 } else { 2510 // connection failed 2511 hci_handle_connection_failed(conn, packet[2]); 2512 } 2513 } 2514 break; 2515 2516 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2517 reverse_bd_addr(&packet[5], addr); 2518 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2519 if (packet[2]){ 2520 // connection failed 2521 break; 2522 } 2523 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2524 if (!conn) { 2525 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2526 } 2527 if (!conn) { 2528 break; 2529 } 2530 conn->state = OPEN; 2531 conn->con_handle = little_endian_read_16(packet, 3); 2532 2533 #ifdef ENABLE_SCO_OVER_HCI 2534 // update SCO 2535 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2536 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2537 } 2538 // trigger can send now 2539 if (hci_have_usb_transport()){ 2540 hci_stack->sco_can_send_now = 1; 2541 } 2542 #endif 2543 #ifdef HAVE_SCO_TRANSPORT 2544 // configure sco transport 2545 if (hci_stack->sco_transport != NULL){ 2546 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2547 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2548 } 2549 #endif 2550 break; 2551 2552 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2553 handle = little_endian_read_16(packet, 3); 2554 conn = hci_connection_for_handle(handle); 2555 if (!conn) break; 2556 if (!packet[2]){ 2557 const uint8_t * features = &packet[5]; 2558 hci_handle_remote_features_page_0(conn, features); 2559 2560 // read extended features if possible 2561 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2562 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2563 break; 2564 } 2565 } 2566 hci_handle_remote_features_received(conn); 2567 break; 2568 2569 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2570 handle = little_endian_read_16(packet, 3); 2571 conn = hci_connection_for_handle(handle); 2572 if (!conn) break; 2573 // status = ok, page = 1 2574 if (!packet[2]) { 2575 uint8_t page_number = packet[5]; 2576 uint8_t maximum_page_number = packet[6]; 2577 const uint8_t * features = &packet[7]; 2578 bool done = false; 2579 switch (page_number){ 2580 case 1: 2581 hci_handle_remote_features_page_1(conn, features); 2582 if (maximum_page_number >= 2){ 2583 // get Secure Connections (Controller) from Page 2 if available 2584 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2585 } else { 2586 // otherwise, assume SC (Controller) == SC (Host) 2587 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2588 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2589 } 2590 done = true; 2591 } 2592 break; 2593 case 2: 2594 hci_handle_remote_features_page_2(conn, features); 2595 done = true; 2596 break; 2597 default: 2598 break; 2599 } 2600 if (!done) break; 2601 } 2602 hci_handle_remote_features_received(conn); 2603 break; 2604 2605 case HCI_EVENT_LINK_KEY_REQUEST: 2606 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2607 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2608 // request handled by hci_run() 2609 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2610 break; 2611 2612 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2613 reverse_bd_addr(&packet[2], addr); 2614 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2615 if (!conn) break; 2616 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2617 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2618 // Change Connection Encryption keeps link key type 2619 if (link_key_type != CHANGED_COMBINATION_KEY){ 2620 conn->link_key_type = link_key_type; 2621 } 2622 // only store link key: 2623 // - if bondable enabled 2624 if (hci_stack->bondable == false) break; 2625 // - for SSP, also check if remote side requested bonding as well 2626 if (conn->link_key_type != COMBINATION_KEY){ 2627 uint8_t auth_req_ignoring_mitm = conn->io_cap_response_auth_req & 0xfe; 2628 if (auth_req_ignoring_mitm == SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_NO_BONDING){ 2629 break; 2630 } 2631 } 2632 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2633 // still forward event to allow dismiss of pairing dialog 2634 break; 2635 } 2636 2637 case HCI_EVENT_PIN_CODE_REQUEST: 2638 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2639 // non-bondable mode: pin code negative reply will be sent 2640 if (!hci_stack->bondable){ 2641 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2642 hci_run(); 2643 return; 2644 } 2645 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2646 if (!hci_stack->link_key_db) break; 2647 hci_event_pin_code_request_get_bd_addr(packet, addr); 2648 hci_stack->link_key_db->delete_link_key(addr); 2649 break; 2650 2651 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2652 hci_event_io_capability_response_get_bd_addr(packet, addr); 2653 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2654 if (!conn) break; 2655 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2656 break; 2657 2658 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2659 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2660 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2661 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2662 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2663 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2664 } else { 2665 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2666 } 2667 #endif 2668 break; 2669 2670 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2671 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2672 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2673 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_REMOTE_OOB_DATA_REPLY); 2674 break; 2675 #endif 2676 2677 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2678 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2679 if (!hci_stack->ssp_auto_accept) break; 2680 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2681 break; 2682 2683 case HCI_EVENT_USER_PASSKEY_REQUEST: 2684 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2685 if (!hci_stack->ssp_auto_accept) break; 2686 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2687 break; 2688 2689 case HCI_EVENT_MODE_CHANGE: 2690 handle = hci_event_mode_change_get_handle(packet); 2691 conn = hci_connection_for_handle(handle); 2692 if (!conn) break; 2693 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2694 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2695 break; 2696 #endif 2697 2698 case HCI_EVENT_ENCRYPTION_CHANGE: 2699 handle = hci_event_encryption_change_get_connection_handle(packet); 2700 conn = hci_connection_for_handle(handle); 2701 if (!conn) break; 2702 if (hci_event_encryption_change_get_status(packet) == 0u) { 2703 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2704 if (encryption_enabled){ 2705 if (hci_is_le_connection(conn)){ 2706 // For LE, we accept connection as encrypted 2707 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2708 } 2709 #ifdef ENABLE_CLASSIC 2710 else { 2711 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2712 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2713 bool connected_uses_aes_ccm = encryption_enabled == 2; 2714 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2715 log_info("SC during pairing, but only E0 now -> abort"); 2716 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2717 break; 2718 } 2719 2720 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2721 if (connected_uses_aes_ccm){ 2722 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2723 } 2724 2725 #ifdef ENABLE_TESTING_SUPPORT 2726 // work around for issue with PTS dongle 2727 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2728 #endif 2729 2730 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2731 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2732 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2733 } else { 2734 // if not, pretend everything is perfect 2735 hci_handle_read_encryption_key_size_complete(conn, 16); 2736 } 2737 } 2738 #endif 2739 } else { 2740 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2741 } 2742 } 2743 2744 break; 2745 2746 #ifdef ENABLE_CLASSIC 2747 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2748 handle = hci_event_authentication_complete_get_connection_handle(packet); 2749 conn = hci_connection_for_handle(handle); 2750 if (!conn) break; 2751 2752 // ignore authentication event if we didn't request it 2753 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2754 2755 // dedicated bonding: send result and disconnect 2756 if (conn->bonding_flags & BONDING_DEDICATED){ 2757 conn->bonding_flags &= ~BONDING_DEDICATED; 2758 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2759 conn->bonding_status = packet[2]; 2760 break; 2761 } 2762 2763 // authenticated only if auth status == 0 2764 if (hci_event_authentication_complete_get_status(packet) == 0){ 2765 // authenticated 2766 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2767 2768 // If link key sufficient for requested security and not already encrypted, start encryption 2769 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2770 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2771 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2772 break; 2773 } 2774 } 2775 2776 // emit updated security level 2777 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2778 break; 2779 #endif 2780 2781 // HCI_EVENT_DISCONNECTION_COMPLETE 2782 // has been split, to first notify stack before shutting connection down 2783 // see end of function, too. 2784 case HCI_EVENT_DISCONNECTION_COMPLETE: 2785 if (packet[2]) break; // status != 0 2786 handle = little_endian_read_16(packet, 3); 2787 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2788 if (hci_stack->acl_fragmentation_total_size > 0u) { 2789 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2790 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2791 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2792 hci_stack->acl_fragmentation_total_size = 0; 2793 hci_stack->acl_fragmentation_pos = 0; 2794 if (release_buffer){ 2795 hci_release_packet_buffer(); 2796 } 2797 } 2798 } 2799 2800 conn = hci_connection_for_handle(handle); 2801 if (!conn) break; 2802 // mark connection for shutdown 2803 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2804 2805 // emit dedicatd bonding event 2806 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2807 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2808 } 2809 2810 #ifdef ENABLE_BLE 2811 #ifdef ENABLE_LE_PERIPHERAL 2812 // re-enable advertisements for le connections if active 2813 if (hci_is_le_connection(conn)){ 2814 hci_update_advertisements_enabled_for_current_roles(); 2815 } 2816 #endif 2817 #endif 2818 break; 2819 2820 case HCI_EVENT_HARDWARE_ERROR: 2821 log_error("Hardware Error: 0x%02x", packet[2]); 2822 if (hci_stack->hardware_error_callback){ 2823 (*hci_stack->hardware_error_callback)(packet[2]); 2824 } else { 2825 // if no special requests, just reboot stack 2826 hci_power_control_off(); 2827 hci_power_control_on(); 2828 } 2829 break; 2830 2831 #ifdef ENABLE_CLASSIC 2832 case HCI_EVENT_ROLE_CHANGE: 2833 if (packet[2]) break; // status != 0 2834 reverse_bd_addr(&packet[3], addr); 2835 addr_type = BD_ADDR_TYPE_ACL; 2836 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2837 if (!conn) break; 2838 conn->role = packet[9]; 2839 break; 2840 #endif 2841 2842 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2843 // release packet buffer only for asynchronous transport and if there are not further fragements 2844 if (hci_transport_synchronous()) { 2845 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2846 return; // instead of break: to avoid re-entering hci_run() 2847 } 2848 hci_stack->acl_fragmentation_tx_active = 0; 2849 if (hci_stack->acl_fragmentation_total_size) break; 2850 hci_release_packet_buffer(); 2851 2852 // L2CAP receives this event via the hci_emit_event below 2853 2854 #ifdef ENABLE_CLASSIC 2855 // For SCO, we do the can_send_now_check here 2856 hci_notify_if_sco_can_send_now(); 2857 #endif 2858 break; 2859 2860 #ifdef ENABLE_CLASSIC 2861 case HCI_EVENT_SCO_CAN_SEND_NOW: 2862 // For SCO, we do the can_send_now_check here 2863 hci_stack->sco_can_send_now = 1; 2864 hci_notify_if_sco_can_send_now(); 2865 return; 2866 2867 // explode inquriy results for easier consumption 2868 case HCI_EVENT_INQUIRY_RESULT: 2869 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2870 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2871 gap_inquiry_explode(packet, size); 2872 break; 2873 #endif 2874 2875 #ifdef ENABLE_BLE 2876 case HCI_EVENT_LE_META: 2877 switch (packet[2]){ 2878 #ifdef ENABLE_LE_CENTRAL 2879 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2880 // log_info("advertising report received"); 2881 if (!hci_stack->le_scanning_enabled) break; 2882 le_handle_advertisement_report(packet, size); 2883 break; 2884 #endif 2885 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2886 event_handle_le_connection_complete(packet); 2887 break; 2888 2889 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2890 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2891 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2892 conn = hci_connection_for_handle(handle); 2893 if (!conn) break; 2894 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2895 break; 2896 2897 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2898 // connection 2899 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2900 conn = hci_connection_for_handle(handle); 2901 if (conn) { 2902 // read arguments 2903 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2904 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2905 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2906 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2907 2908 // validate against current connection parameter range 2909 le_connection_parameter_range_t existing_range; 2910 gap_get_connection_parameter_range(&existing_range); 2911 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2912 if (update_parameter){ 2913 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2914 conn->le_conn_interval_min = le_conn_interval_min; 2915 conn->le_conn_interval_max = le_conn_interval_max; 2916 conn->le_conn_latency = le_conn_latency; 2917 conn->le_supervision_timeout = le_supervision_timeout; 2918 } else { 2919 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 2920 } 2921 } 2922 break; 2923 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2924 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2925 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2926 conn = hci_connection_for_handle(handle); 2927 if (conn) { 2928 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2929 } 2930 break; 2931 #endif 2932 default: 2933 break; 2934 } 2935 break; 2936 #endif 2937 case HCI_EVENT_VENDOR_SPECIFIC: 2938 // Vendor specific commands often create vendor specific event instead of num completed packets 2939 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2940 switch (hci_stack->manufacturer){ 2941 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2942 hci_stack->num_cmd_packets = 1; 2943 break; 2944 default: 2945 break; 2946 } 2947 break; 2948 default: 2949 break; 2950 } 2951 2952 handle_event_for_current_stack_state(packet, size); 2953 2954 // notify upper stack 2955 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2956 2957 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2958 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 2959 handle = little_endian_read_16(packet, 3); 2960 hci_connection_t * aConn = hci_connection_for_handle(handle); 2961 // discard connection if app did not trigger a reconnect in the event handler 2962 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2963 hci_shutdown_connection(aConn); 2964 } 2965 } 2966 2967 // execute main loop 2968 hci_run(); 2969 } 2970 2971 #ifdef ENABLE_CLASSIC 2972 2973 #ifdef ENABLE_SCO_OVER_HCI 2974 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2975 static void sco_schedule_tx(hci_connection_t * conn); 2976 2977 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2978 log_debug("SCO TX Timeout"); 2979 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2980 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2981 if (!conn) return; 2982 2983 // trigger send 2984 conn->sco_tx_ready = 1; 2985 // extra packet if CVSD but SCO buffer is too short 2986 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2987 conn->sco_tx_ready++; 2988 } 2989 hci_notify_if_sco_can_send_now(); 2990 } 2991 2992 2993 #define SCO_TX_AFTER_RX_MS (6) 2994 2995 static void sco_schedule_tx(hci_connection_t * conn){ 2996 2997 uint32_t now = btstack_run_loop_get_time_ms(); 2998 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2999 int time_delta_ms = sco_tx_ms - now; 3000 3001 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3002 3003 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3004 btstack_run_loop_set_timer(timer, time_delta_ms); 3005 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3006 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3007 btstack_run_loop_add_timer(timer); 3008 } 3009 #endif 3010 3011 static void sco_handler(uint8_t * packet, uint16_t size){ 3012 // lookup connection struct 3013 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3014 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3015 if (!conn) return; 3016 3017 #ifdef ENABLE_SCO_OVER_HCI 3018 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3019 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3020 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3021 packet[2] = 0x3c; 3022 memmove(&packet[3], &packet[23], 63); 3023 size = 63; 3024 } 3025 } 3026 3027 if (hci_have_usb_transport()){ 3028 // Nothing to do 3029 } else { 3030 // 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); 3031 if (hci_stack->synchronous_flow_control_enabled == 0){ 3032 uint32_t now = btstack_run_loop_get_time_ms(); 3033 3034 if (!conn->sco_rx_valid){ 3035 // ignore first 10 packets 3036 conn->sco_rx_count++; 3037 // log_debug("sco rx count %u", conn->sco_rx_count); 3038 if (conn->sco_rx_count == 10) { 3039 // use first timestamp as is and pretent it just started 3040 conn->sco_rx_ms = now; 3041 conn->sco_rx_valid = 1; 3042 conn->sco_rx_count = 0; 3043 sco_schedule_tx(conn); 3044 } 3045 } else { 3046 // track expected arrival timme 3047 conn->sco_rx_count++; 3048 conn->sco_rx_ms += 7; 3049 int delta = (int32_t) (now - conn->sco_rx_ms); 3050 if (delta > 0){ 3051 conn->sco_rx_ms++; 3052 } 3053 // log_debug("sco rx %u", conn->sco_rx_ms); 3054 sco_schedule_tx(conn); 3055 } 3056 } 3057 } 3058 #endif 3059 3060 // deliver to app 3061 if (hci_stack->sco_packet_handler) { 3062 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3063 } 3064 3065 #ifdef HAVE_SCO_TRANSPORT 3066 // We can send one packet for each received packet 3067 conn->sco_tx_ready++; 3068 hci_notify_if_sco_can_send_now(); 3069 #endif 3070 3071 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3072 conn->num_packets_completed++; 3073 hci_stack->host_completed_packets = 1; 3074 hci_run(); 3075 #endif 3076 } 3077 #endif 3078 3079 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3080 hci_dump_packet(packet_type, 1, packet, size); 3081 switch (packet_type) { 3082 case HCI_EVENT_PACKET: 3083 event_handler(packet, size); 3084 break; 3085 case HCI_ACL_DATA_PACKET: 3086 acl_handler(packet, size); 3087 break; 3088 #ifdef ENABLE_CLASSIC 3089 case HCI_SCO_DATA_PACKET: 3090 sco_handler(packet, size); 3091 break; 3092 #endif 3093 default: 3094 break; 3095 } 3096 } 3097 3098 /** 3099 * @brief Add event packet handler. 3100 */ 3101 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3102 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3103 } 3104 3105 3106 /** Register HCI packet handlers */ 3107 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3108 hci_stack->acl_packet_handler = handler; 3109 } 3110 3111 #ifdef ENABLE_CLASSIC 3112 /** 3113 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3114 */ 3115 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3116 hci_stack->sco_packet_handler = handler; 3117 } 3118 #endif 3119 3120 static void hci_state_reset(void){ 3121 // no connections yet 3122 hci_stack->connections = NULL; 3123 3124 // keep discoverable/connectable as this has been requested by the client(s) 3125 // hci_stack->discoverable = 0; 3126 // hci_stack->connectable = 0; 3127 // hci_stack->bondable = 1; 3128 // hci_stack->own_addr_type = 0; 3129 3130 // buffer is free 3131 hci_stack->hci_packet_buffer_reserved = 0; 3132 3133 // no pending cmds 3134 hci_stack->decline_reason = 0; 3135 hci_stack->new_scan_enable_value = 0xff; 3136 3137 hci_stack->secure_connections_active = false; 3138 3139 #ifdef ENABLE_CLASSIC 3140 hci_stack->new_page_scan_interval = 0xffff; 3141 hci_stack->new_page_scan_window = 0xffff; 3142 hci_stack->new_page_scan_type = 0xff; 3143 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3144 #endif 3145 3146 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3147 hci_stack->classic_read_local_oob_data = true; 3148 #endif 3149 3150 // LE 3151 #ifdef ENABLE_BLE 3152 memset(hci_stack->le_random_address, 0, 6); 3153 hci_stack->le_random_address_set = 0; 3154 #endif 3155 #ifdef ENABLE_LE_CENTRAL 3156 hci_stack->le_scanning_active = 0; 3157 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3158 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3159 hci_stack->le_whitelist_capacity = 0; 3160 #endif 3161 } 3162 3163 #ifdef ENABLE_CLASSIC 3164 /** 3165 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3166 */ 3167 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3168 // store and open remote device db 3169 hci_stack->link_key_db = link_key_db; 3170 if (hci_stack->link_key_db) { 3171 hci_stack->link_key_db->open(); 3172 } 3173 } 3174 #endif 3175 3176 void hci_init(const hci_transport_t *transport, const void *config){ 3177 3178 #ifdef HAVE_MALLOC 3179 if (!hci_stack) { 3180 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3181 } 3182 #else 3183 hci_stack = &hci_stack_static; 3184 #endif 3185 memset(hci_stack, 0, sizeof(hci_stack_t)); 3186 3187 // reference to use transport layer implementation 3188 hci_stack->hci_transport = transport; 3189 3190 // reference to used config 3191 hci_stack->config = config; 3192 3193 // setup pointer for outgoing packet buffer 3194 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3195 3196 // max acl payload size defined in config.h 3197 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3198 3199 // register packet handlers with transport 3200 transport->register_packet_handler(&packet_handler); 3201 3202 hci_stack->state = HCI_STATE_OFF; 3203 3204 // class of device 3205 hci_stack->class_of_device = 0x007a020c; // Smartphone 3206 3207 // bondable by default 3208 hci_stack->bondable = 1; 3209 3210 #ifdef ENABLE_CLASSIC 3211 // classic name 3212 hci_stack->local_name = default_classic_name; 3213 3214 // Master slave policy 3215 hci_stack->master_slave_policy = 1; 3216 3217 // Allow Role Switch 3218 hci_stack->allow_role_switch = 1; 3219 3220 // Default / minimum security level = 2 3221 hci_stack->gap_security_level = LEVEL_2; 3222 3223 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3224 hci_stack->gap_required_encyrption_key_size = 7; 3225 3226 // Link Supervision Timeout 3227 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3228 3229 #endif 3230 3231 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3232 hci_stack->ssp_enable = 1; 3233 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3234 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3235 hci_stack->ssp_auto_accept = 1; 3236 3237 // Secure Connections: enable (requires support from Controller) 3238 hci_stack->secure_connections_enable = true; 3239 3240 // voice setting - signed 16 bit pcm data with CVSD over the air 3241 hci_stack->sco_voice_setting = 0x60; 3242 3243 #ifdef ENABLE_LE_CENTRAL 3244 // connection parameter to use for outgoing connections 3245 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3246 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3247 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3248 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3249 hci_stack->le_connection_latency = 4; // 4 3250 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3251 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3252 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3253 3254 // default LE Scanning 3255 hci_stack->le_scan_type = 0x1; // active 3256 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3257 hci_stack->le_scan_window = 0x30; // 30 ms 3258 #endif 3259 3260 #ifdef ENABLE_LE_PERIPHERAL 3261 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3262 #endif 3263 3264 // connection parameter range used to answer connection parameter update requests in l2cap 3265 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3266 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3267 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3268 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3269 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3270 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3271 3272 hci_state_reset(); 3273 } 3274 3275 void hci_deinit(void){ 3276 #ifdef HAVE_MALLOC 3277 if (hci_stack) { 3278 free(hci_stack); 3279 } 3280 #endif 3281 hci_stack = NULL; 3282 3283 #ifdef ENABLE_CLASSIC 3284 disable_l2cap_timeouts = 0; 3285 #endif 3286 } 3287 3288 /** 3289 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3290 */ 3291 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3292 hci_stack->chipset = chipset_driver; 3293 3294 // reset chipset driver - init is also called on power_up 3295 if (hci_stack->chipset && hci_stack->chipset->init){ 3296 hci_stack->chipset->init(hci_stack->config); 3297 } 3298 } 3299 3300 /** 3301 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3302 */ 3303 void hci_set_control(const btstack_control_t *hardware_control){ 3304 // references to used control implementation 3305 hci_stack->control = hardware_control; 3306 // init with transport config 3307 hardware_control->init(hci_stack->config); 3308 } 3309 3310 void hci_close(void){ 3311 3312 #ifdef ENABLE_CLASSIC 3313 // close remote device db 3314 if (hci_stack->link_key_db) { 3315 hci_stack->link_key_db->close(); 3316 } 3317 #endif 3318 3319 btstack_linked_list_iterator_t lit; 3320 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3321 while (btstack_linked_list_iterator_has_next(&lit)){ 3322 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3323 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3324 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3325 hci_shutdown_connection(connection); 3326 } 3327 3328 hci_power_control(HCI_POWER_OFF); 3329 3330 #ifdef HAVE_MALLOC 3331 free(hci_stack); 3332 #endif 3333 hci_stack = NULL; 3334 } 3335 3336 #ifdef HAVE_SCO_TRANSPORT 3337 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3338 hci_stack->sco_transport = sco_transport; 3339 sco_transport->register_packet_handler(&packet_handler); 3340 } 3341 #endif 3342 3343 #ifdef ENABLE_CLASSIC 3344 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3345 // validate ranage and set 3346 if (encryption_key_size < 7) return; 3347 if (encryption_key_size > 16) return; 3348 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3349 } 3350 3351 void gap_set_security_level(gap_security_level_t security_level){ 3352 hci_stack->gap_security_level = security_level; 3353 } 3354 3355 gap_security_level_t gap_get_security_level(void){ 3356 return hci_stack->gap_security_level; 3357 } 3358 #endif 3359 3360 #ifdef ENABLE_CLASSIC 3361 void gap_set_class_of_device(uint32_t class_of_device){ 3362 hci_stack->class_of_device = class_of_device; 3363 } 3364 3365 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3366 hci_stack->default_link_policy_settings = default_link_policy_settings; 3367 } 3368 3369 void gap_set_allow_role_switch(bool allow_role_switch){ 3370 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3371 } 3372 3373 uint8_t hci_get_allow_role_switch(void){ 3374 return hci_stack->allow_role_switch; 3375 } 3376 3377 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3378 hci_stack->link_supervision_timeout = link_supervision_timeout; 3379 } 3380 3381 void hci_disable_l2cap_timeout_check(void){ 3382 disable_l2cap_timeouts = 1; 3383 } 3384 #endif 3385 3386 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3387 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3388 void hci_set_bd_addr(bd_addr_t addr){ 3389 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3390 hci_stack->custom_bd_addr_set = 1; 3391 } 3392 #endif 3393 3394 // State-Module-Driver overview 3395 // state module low-level 3396 // HCI_STATE_OFF off close 3397 // HCI_STATE_INITIALIZING, on open 3398 // HCI_STATE_WORKING, on open 3399 // HCI_STATE_HALTING, on open 3400 // HCI_STATE_SLEEPING, off/sleep close 3401 // HCI_STATE_FALLING_ASLEEP on open 3402 3403 static int hci_power_control_on(void){ 3404 3405 // power on 3406 int err = 0; 3407 if (hci_stack->control && hci_stack->control->on){ 3408 err = (*hci_stack->control->on)(); 3409 } 3410 if (err){ 3411 log_error( "POWER_ON failed"); 3412 hci_emit_hci_open_failed(); 3413 return err; 3414 } 3415 3416 // int chipset driver 3417 if (hci_stack->chipset && hci_stack->chipset->init){ 3418 hci_stack->chipset->init(hci_stack->config); 3419 } 3420 3421 // init transport 3422 if (hci_stack->hci_transport->init){ 3423 hci_stack->hci_transport->init(hci_stack->config); 3424 } 3425 3426 // open transport 3427 err = hci_stack->hci_transport->open(); 3428 if (err){ 3429 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3430 if (hci_stack->control && hci_stack->control->off){ 3431 (*hci_stack->control->off)(); 3432 } 3433 hci_emit_hci_open_failed(); 3434 return err; 3435 } 3436 return 0; 3437 } 3438 3439 static void hci_power_control_off(void){ 3440 3441 log_info("hci_power_control_off"); 3442 3443 // close low-level device 3444 hci_stack->hci_transport->close(); 3445 3446 log_info("hci_power_control_off - hci_transport closed"); 3447 3448 // power off 3449 if (hci_stack->control && hci_stack->control->off){ 3450 (*hci_stack->control->off)(); 3451 } 3452 3453 log_info("hci_power_control_off - control closed"); 3454 3455 hci_stack->state = HCI_STATE_OFF; 3456 } 3457 3458 static void hci_power_control_sleep(void){ 3459 3460 log_info("hci_power_control_sleep"); 3461 3462 #if 0 3463 // don't close serial port during sleep 3464 3465 // close low-level device 3466 hci_stack->hci_transport->close(hci_stack->config); 3467 #endif 3468 3469 // sleep mode 3470 if (hci_stack->control && hci_stack->control->sleep){ 3471 (*hci_stack->control->sleep)(); 3472 } 3473 3474 hci_stack->state = HCI_STATE_SLEEPING; 3475 } 3476 3477 static int hci_power_control_wake(void){ 3478 3479 log_info("hci_power_control_wake"); 3480 3481 // wake on 3482 if (hci_stack->control && hci_stack->control->wake){ 3483 (*hci_stack->control->wake)(); 3484 } 3485 3486 #if 0 3487 // open low-level device 3488 int err = hci_stack->hci_transport->open(hci_stack->config); 3489 if (err){ 3490 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3491 if (hci_stack->control && hci_stack->control->off){ 3492 (*hci_stack->control->off)(); 3493 } 3494 hci_emit_hci_open_failed(); 3495 return err; 3496 } 3497 #endif 3498 3499 return 0; 3500 } 3501 3502 static void hci_power_transition_to_initializing(void){ 3503 // set up state machine 3504 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3505 hci_stack->hci_packet_buffer_reserved = 0; 3506 hci_stack->state = HCI_STATE_INITIALIZING; 3507 hci_stack->substate = HCI_INIT_SEND_RESET; 3508 } 3509 3510 // returns error 3511 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3512 int err; 3513 switch (power_mode){ 3514 case HCI_POWER_ON: 3515 err = hci_power_control_on(); 3516 if (err != 0) { 3517 log_error("hci_power_control_on() error %d", err); 3518 return err; 3519 } 3520 hci_power_transition_to_initializing(); 3521 break; 3522 case HCI_POWER_OFF: 3523 // do nothing 3524 break; 3525 case HCI_POWER_SLEEP: 3526 // do nothing (with SLEEP == OFF) 3527 break; 3528 default: 3529 btstack_assert(false); 3530 break; 3531 } 3532 return ERROR_CODE_SUCCESS; 3533 } 3534 3535 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3536 switch (power_mode){ 3537 case HCI_POWER_ON: 3538 // do nothing 3539 break; 3540 case HCI_POWER_OFF: 3541 // no connections yet, just turn it off 3542 hci_power_control_off(); 3543 break; 3544 case HCI_POWER_SLEEP: 3545 // no connections yet, just turn it off 3546 hci_power_control_sleep(); 3547 break; 3548 default: 3549 btstack_assert(false); 3550 break; 3551 } 3552 return ERROR_CODE_SUCCESS; 3553 } 3554 3555 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3556 switch (power_mode){ 3557 case HCI_POWER_ON: 3558 // do nothing 3559 break; 3560 case HCI_POWER_OFF: 3561 // see hci_run 3562 hci_stack->state = HCI_STATE_HALTING; 3563 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3564 break; 3565 case HCI_POWER_SLEEP: 3566 // see hci_run 3567 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3568 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3569 break; 3570 default: 3571 btstack_assert(false); 3572 break; 3573 } 3574 return ERROR_CODE_SUCCESS; 3575 } 3576 3577 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3578 switch (power_mode){ 3579 case HCI_POWER_ON: 3580 hci_power_transition_to_initializing(); 3581 break; 3582 case HCI_POWER_OFF: 3583 // do nothing 3584 break; 3585 case HCI_POWER_SLEEP: 3586 // see hci_run 3587 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3588 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3589 break; 3590 default: 3591 btstack_assert(false); 3592 break; 3593 } 3594 return ERROR_CODE_SUCCESS; 3595 } 3596 3597 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3598 switch (power_mode){ 3599 case HCI_POWER_ON: 3600 3601 #ifdef HAVE_PLATFORM_IPHONE_OS 3602 // nothing to do, if H4 supports power management 3603 if (btstack_control_iphone_power_management_enabled()){ 3604 hci_stack->state = HCI_STATE_INITIALIZING; 3605 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3606 break; 3607 } 3608 #endif 3609 hci_power_transition_to_initializing(); 3610 break; 3611 case HCI_POWER_OFF: 3612 // see hci_run 3613 hci_stack->state = HCI_STATE_HALTING; 3614 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3615 break; 3616 case HCI_POWER_SLEEP: 3617 // do nothing 3618 break; 3619 default: 3620 btstack_assert(false); 3621 break; 3622 } 3623 return ERROR_CODE_SUCCESS; 3624 } 3625 3626 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3627 int err; 3628 switch (power_mode){ 3629 case HCI_POWER_ON: 3630 #ifdef HAVE_PLATFORM_IPHONE_OS 3631 // nothing to do, if H4 supports power management 3632 if (btstack_control_iphone_power_management_enabled()){ 3633 hci_stack->state = HCI_STATE_INITIALIZING; 3634 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3635 hci_update_scan_enable(); 3636 break; 3637 } 3638 #endif 3639 err = hci_power_control_wake(); 3640 if (err) return err; 3641 hci_power_transition_to_initializing(); 3642 break; 3643 case HCI_POWER_OFF: 3644 hci_stack->state = HCI_STATE_HALTING; 3645 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3646 break; 3647 case HCI_POWER_SLEEP: 3648 // do nothing 3649 break; 3650 default: 3651 btstack_assert(false); 3652 break; 3653 } 3654 return ERROR_CODE_SUCCESS; 3655 } 3656 3657 int hci_power_control(HCI_POWER_MODE power_mode){ 3658 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3659 int err = 0; 3660 switch (hci_stack->state){ 3661 case HCI_STATE_OFF: 3662 err = hci_power_control_state_off(power_mode); 3663 break; 3664 case HCI_STATE_INITIALIZING: 3665 err = hci_power_control_state_initializing(power_mode); 3666 break; 3667 case HCI_STATE_WORKING: 3668 err = hci_power_control_state_working(power_mode); 3669 break; 3670 case HCI_STATE_HALTING: 3671 err = hci_power_control_state_halting(power_mode); 3672 break; 3673 case HCI_STATE_FALLING_ASLEEP: 3674 err = hci_power_control_state_falling_asleep(power_mode); 3675 break; 3676 case HCI_STATE_SLEEPING: 3677 err = hci_power_control_state_sleeping(power_mode); 3678 break; 3679 default: 3680 btstack_assert(false); 3681 break; 3682 } 3683 if (err != 0){ 3684 return err; 3685 } 3686 3687 // create internal event 3688 hci_emit_state(); 3689 3690 // trigger next/first action 3691 hci_run(); 3692 3693 return 0; 3694 } 3695 3696 3697 #ifdef ENABLE_CLASSIC 3698 3699 static void hci_update_scan_enable(void){ 3700 // 2 = page scan, 1 = inq scan 3701 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3702 hci_run(); 3703 } 3704 3705 void gap_discoverable_control(uint8_t enable){ 3706 if (enable) enable = 1; // normalize argument 3707 3708 if (hci_stack->discoverable == enable){ 3709 hci_emit_discoverable_enabled(hci_stack->discoverable); 3710 return; 3711 } 3712 3713 hci_stack->discoverable = enable; 3714 hci_update_scan_enable(); 3715 } 3716 3717 void gap_connectable_control(uint8_t enable){ 3718 if (enable) enable = 1; // normalize argument 3719 3720 // don't emit event 3721 if (hci_stack->connectable == enable) return; 3722 3723 hci_stack->connectable = enable; 3724 hci_update_scan_enable(); 3725 } 3726 #endif 3727 3728 void gap_local_bd_addr(bd_addr_t address_buffer){ 3729 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3730 } 3731 3732 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3733 static void hci_host_num_completed_packets(void){ 3734 3735 // create packet manually as arrays are not supported and num_commands should not get reduced 3736 hci_reserve_packet_buffer(); 3737 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3738 3739 uint16_t size = 0; 3740 uint16_t num_handles = 0; 3741 packet[size++] = 0x35; 3742 packet[size++] = 0x0c; 3743 size++; // skip param len 3744 size++; // skip num handles 3745 3746 // add { handle, packets } entries 3747 btstack_linked_item_t * it; 3748 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3749 hci_connection_t * connection = (hci_connection_t *) it; 3750 if (connection->num_packets_completed){ 3751 little_endian_store_16(packet, size, connection->con_handle); 3752 size += 2; 3753 little_endian_store_16(packet, size, connection->num_packets_completed); 3754 size += 2; 3755 // 3756 num_handles++; 3757 connection->num_packets_completed = 0; 3758 } 3759 } 3760 3761 packet[2] = size - 3; 3762 packet[3] = num_handles; 3763 3764 hci_stack->host_completed_packets = 0; 3765 3766 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3767 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3768 3769 // release packet buffer for synchronous transport implementations 3770 if (hci_transport_synchronous()){ 3771 hci_release_packet_buffer(); 3772 hci_emit_transport_packet_sent(); 3773 } 3774 } 3775 #endif 3776 3777 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3778 UNUSED(ds); 3779 hci_stack->substate = HCI_HALTING_CLOSE; 3780 // allow packet handlers to defer final shutdown 3781 hci_emit_state(); 3782 hci_run(); 3783 } 3784 3785 static bool hci_run_acl_fragments(void){ 3786 if (hci_stack->acl_fragmentation_total_size > 0u) { 3787 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3788 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3789 if (connection) { 3790 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3791 hci_send_acl_packet_fragments(connection); 3792 return true; 3793 } 3794 } else { 3795 // connection gone -> discard further fragments 3796 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3797 hci_stack->acl_fragmentation_total_size = 0; 3798 hci_stack->acl_fragmentation_pos = 0; 3799 } 3800 } 3801 return false; 3802 } 3803 3804 #ifdef ENABLE_CLASSIC 3805 static bool hci_run_general_gap_classic(void){ 3806 3807 // decline incoming connections 3808 if (hci_stack->decline_reason){ 3809 uint8_t reason = hci_stack->decline_reason; 3810 hci_stack->decline_reason = 0; 3811 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3812 return true; 3813 } 3814 // write page scan activity 3815 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_interval != 0xffff) && hci_classic_supported()){ 3816 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 3817 hci_stack->new_page_scan_interval = 0xffff; 3818 hci_stack->new_page_scan_window = 0xffff; 3819 return true; 3820 } 3821 // write page scan type 3822 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_type != 0xff) && hci_classic_supported()){ 3823 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 3824 hci_stack->new_page_scan_type = 0xff; 3825 return true; 3826 } 3827 // send scan enable 3828 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3829 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3830 hci_stack->new_scan_enable_value = 0xff; 3831 return true; 3832 } 3833 // start/stop inquiry 3834 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3835 uint8_t duration = hci_stack->inquiry_state; 3836 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 3837 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 3838 return true; 3839 } 3840 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3841 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3842 hci_send_cmd(&hci_inquiry_cancel); 3843 return true; 3844 } 3845 // remote name request 3846 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3847 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3848 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3849 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3850 return true; 3851 } 3852 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3853 // Local OOB data 3854 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 3855 hci_stack->classic_read_local_oob_data = false; 3856 if (hci_stack->local_supported_commands[1] & 0x10u){ 3857 hci_send_cmd(&hci_read_local_extended_oob_data); 3858 } else { 3859 hci_send_cmd(&hci_read_local_oob_data); 3860 } 3861 } 3862 #endif 3863 // pairing 3864 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3865 uint8_t state = hci_stack->gap_pairing_state; 3866 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3867 uint8_t pin_code[16]; 3868 switch (state){ 3869 case GAP_PAIRING_STATE_SEND_PIN: 3870 memset(pin_code, 0, 16); 3871 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 3872 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 3873 break; 3874 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3875 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3876 break; 3877 case GAP_PAIRING_STATE_SEND_PASSKEY: 3878 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3879 break; 3880 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3881 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3882 break; 3883 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3884 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3885 break; 3886 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3887 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3888 break; 3889 default: 3890 break; 3891 } 3892 return true; 3893 } 3894 return false; 3895 } 3896 #endif 3897 3898 #ifdef ENABLE_BLE 3899 static bool hci_run_general_gap_le(void){ 3900 3901 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3902 3903 if (hci_stack->state != HCI_STATE_WORKING) return false; 3904 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3905 3906 3907 // Phase 1: collect what to stop 3908 3909 bool scanning_stop = false; 3910 bool connecting_stop = false; 3911 bool advertising_stop = false; 3912 3913 #ifndef ENABLE_LE_CENTRAL 3914 UNUSED(scanning_stop); 3915 UNUSED(connecting_stop); 3916 #endif 3917 #ifndef ENABLE_LE_PERIPHERAL 3918 UNUSED(advertising_stop); 3919 #endif 3920 3921 // check if whitelist needs modification 3922 bool whitelist_modification_pending = false; 3923 btstack_linked_list_iterator_t lit; 3924 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3925 while (btstack_linked_list_iterator_has_next(&lit)){ 3926 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3927 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3928 whitelist_modification_pending = true; 3929 break; 3930 } 3931 } 3932 // check if resolving list needs modification 3933 bool resolving_list_modification_pending = false; 3934 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3935 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 3936 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 3937 resolving_list_modification_pending = true; 3938 } 3939 #endif 3940 3941 #ifdef ENABLE_LE_CENTRAL 3942 // scanning control 3943 if (hci_stack->le_scanning_active) { 3944 // stop if: 3945 // - parameter change required 3946 // - it's disabled 3947 // - whitelist change required but used for scanning 3948 // - resolving list modified 3949 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 3950 if ((hci_stack->le_scanning_param_update) || 3951 !hci_stack->le_scanning_enabled || 3952 scanning_uses_whitelist || 3953 resolving_list_modification_pending){ 3954 3955 scanning_stop = true; 3956 } 3957 } 3958 #endif 3959 3960 #ifdef ENABLE_LE_CENTRAL 3961 // connecting control 3962 bool connecting_with_whitelist; 3963 switch (hci_stack->le_connecting_state){ 3964 case LE_CONNECTING_DIRECT: 3965 case LE_CONNECTING_WHITELIST: 3966 // stop connecting if: 3967 // - connecting uses white and whitelist modification pending 3968 // - if it got disabled 3969 // - resolving list modified 3970 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 3971 if ((connecting_with_whitelist && whitelist_modification_pending) || 3972 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 3973 resolving_list_modification_pending) { 3974 3975 connecting_stop = true; 3976 } 3977 break; 3978 default: 3979 break; 3980 } 3981 #endif 3982 3983 #ifdef ENABLE_LE_PERIPHERAL 3984 // le advertisement control 3985 if (hci_stack->le_advertisements_active){ 3986 // stop if: 3987 // - parameter change required 3988 // - it's disabled 3989 // - whitelist change required but used for advertisement filter policy 3990 // - resolving list modified 3991 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy > 0; 3992 if ((hci_stack->le_advertisements_todo != 0) || 3993 !hci_stack->le_advertisements_enabled_for_current_roles || 3994 (advertising_uses_whitelist & whitelist_modification_pending) || 3995 resolving_list_modification_pending) { 3996 3997 advertising_stop = true; 3998 } 3999 } 4000 #endif 4001 4002 4003 // Phase 2: stop everything that should be off during modifications 4004 4005 #ifdef ENABLE_LE_CENTRAL 4006 if (scanning_stop){ 4007 hci_stack->le_scanning_active = false; 4008 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4009 return true; 4010 } 4011 #endif 4012 4013 #ifdef ENABLE_LE_CENTRAL 4014 if (connecting_stop){ 4015 hci_send_cmd(&hci_le_create_connection_cancel); 4016 return true; 4017 } 4018 #endif 4019 4020 #ifdef ENABLE_LE_PERIPHERAL 4021 if (advertising_stop){ 4022 hci_stack->le_advertisements_active = false; 4023 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4024 return true; 4025 } 4026 #endif 4027 4028 // Phase 3: modify 4029 4030 #ifdef ENABLE_LE_CENTRAL 4031 if (hci_stack->le_scanning_param_update){ 4032 hci_stack->le_scanning_param_update = false; 4033 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4034 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4035 return true; 4036 } 4037 #endif 4038 4039 #ifdef ENABLE_LE_PERIPHERAL 4040 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4041 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4042 hci_send_cmd(&hci_le_set_advertising_parameters, 4043 hci_stack->le_advertisements_interval_min, 4044 hci_stack->le_advertisements_interval_max, 4045 hci_stack->le_advertisements_type, 4046 hci_stack->le_own_addr_type, 4047 hci_stack->le_advertisements_direct_address_type, 4048 hci_stack->le_advertisements_direct_address, 4049 hci_stack->le_advertisements_channel_map, 4050 hci_stack->le_advertisements_filter_policy); 4051 return true; 4052 } 4053 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4054 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4055 uint8_t adv_data_clean[31]; 4056 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4057 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4058 hci_stack->le_advertisements_data_len); 4059 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4060 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4061 return true; 4062 } 4063 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4064 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4065 uint8_t scan_data_clean[31]; 4066 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4067 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4068 hci_stack->le_scan_response_data_len); 4069 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4070 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4071 return true; 4072 } 4073 #endif 4074 4075 4076 #ifdef ENABLE_LE_CENTRAL 4077 // if connect with whitelist was active and is not cancelled yet, wait until next time 4078 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4079 #endif 4080 4081 // LE Whitelist Management 4082 if (whitelist_modification_pending){ 4083 // add/remove entries 4084 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4085 while (btstack_linked_list_iterator_has_next(&lit)){ 4086 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4087 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4088 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4089 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4090 return true; 4091 } 4092 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4093 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4094 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4095 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4096 return true; 4097 } 4098 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4099 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4100 btstack_memory_whitelist_entry_free(entry); 4101 } 4102 } 4103 } 4104 4105 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4106 // LE Resolving List Management 4107 if (resolving_list_supported) { 4108 uint16_t i; 4109 switch (hci_stack->le_resolving_list_state) { 4110 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4111 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4112 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4113 return true; 4114 case LE_RESOLVING_LIST_READ_SIZE: 4115 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4116 hci_send_cmd(&hci_le_read_resolving_list_size); 4117 return true; 4118 case LE_RESOLVING_LIST_SEND_CLEAR: 4119 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4120 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4121 sizeof(hci_stack->le_resolving_list_add_entries)); 4122 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4123 sizeof(hci_stack->le_resolving_list_remove_entries)); 4124 hci_send_cmd(&hci_le_clear_resolving_list); 4125 return true; 4126 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4127 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4128 uint8_t offset = i >> 3; 4129 uint8_t mask = 1 << (i & 7); 4130 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4131 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4132 bd_addr_t peer_identity_addreses; 4133 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4134 sm_key_t peer_irk; 4135 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4136 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4137 4138 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4139 // trigger whitelist entry 'update' (work around for controller bug) 4140 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4141 while (btstack_linked_list_iterator_has_next(&lit)) { 4142 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4143 if (entry->address_type != peer_identity_addr_type) continue; 4144 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4145 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4146 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4147 } 4148 #endif 4149 4150 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4151 peer_identity_addreses); 4152 return true; 4153 } 4154 4155 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4156 4157 /* fall through */ 4158 4159 case LE_RESOLVING_LIST_ADD_ENTRIES: 4160 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4161 uint8_t offset = i >> 3; 4162 uint8_t mask = 1 << (i & 7); 4163 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4164 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4165 bd_addr_t peer_identity_addreses; 4166 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4167 sm_key_t peer_irk; 4168 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4169 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4170 const uint8_t *local_irk = gap_get_persistent_irk(); 4171 // command uses format specifier 'P' that stores 16-byte value without flip 4172 uint8_t local_irk_flipped[16]; 4173 uint8_t peer_irk_flipped[16]; 4174 reverse_128(local_irk, local_irk_flipped); 4175 reverse_128(peer_irk, peer_irk_flipped); 4176 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4177 peer_irk_flipped, local_irk_flipped); 4178 return true; 4179 } 4180 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4181 break; 4182 4183 default: 4184 break; 4185 } 4186 } 4187 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4188 #endif 4189 4190 // Phase 4: restore state 4191 4192 #ifdef ENABLE_LE_CENTRAL 4193 // re-start scanning 4194 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4195 hci_stack->le_scanning_active = true; 4196 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4197 return true; 4198 } 4199 #endif 4200 4201 #ifdef ENABLE_LE_CENTRAL 4202 // re-start connecting 4203 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4204 bd_addr_t null_addr; 4205 memset(null_addr, 0, 6); 4206 hci_send_cmd(&hci_le_create_connection, 4207 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4208 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4209 1, // use whitelist 4210 0, // peer address type 4211 null_addr, // peer bd addr 4212 hci_stack->le_own_addr_type, // our addr type: 4213 hci_stack->le_connection_interval_min, // conn interval min 4214 hci_stack->le_connection_interval_max, // conn interval max 4215 hci_stack->le_connection_latency, // conn latency 4216 hci_stack->le_supervision_timeout, // conn latency 4217 hci_stack->le_minimum_ce_length, // min ce length 4218 hci_stack->le_maximum_ce_length // max ce length 4219 ); 4220 return true; 4221 } 4222 #endif 4223 4224 #ifdef ENABLE_LE_PERIPHERAL 4225 // re-start advertising 4226 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4227 // check if advertisements should be enabled given 4228 hci_stack->le_advertisements_active = true; 4229 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4230 return true; 4231 } 4232 #endif 4233 4234 return false; 4235 } 4236 #endif 4237 4238 static bool hci_run_general_pending_commands(void){ 4239 btstack_linked_item_t * it; 4240 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4241 hci_connection_t * connection = (hci_connection_t *) it; 4242 4243 switch(connection->state){ 4244 case SEND_CREATE_CONNECTION: 4245 switch(connection->address_type){ 4246 #ifdef ENABLE_CLASSIC 4247 case BD_ADDR_TYPE_ACL: 4248 log_info("sending hci_create_connection"); 4249 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4250 break; 4251 #endif 4252 default: 4253 #ifdef ENABLE_BLE 4254 #ifdef ENABLE_LE_CENTRAL 4255 log_info("sending hci_le_create_connection"); 4256 hci_send_cmd(&hci_le_create_connection, 4257 hci_stack->le_connection_scan_interval, // conn scan interval 4258 hci_stack->le_connection_scan_window, // conn scan windows 4259 0, // don't use whitelist 4260 connection->address_type, // peer address type 4261 connection->address, // peer bd addr 4262 hci_stack->le_own_addr_type, // our addr type: 4263 hci_stack->le_connection_interval_min, // conn interval min 4264 hci_stack->le_connection_interval_max, // conn interval max 4265 hci_stack->le_connection_latency, // conn latency 4266 hci_stack->le_supervision_timeout, // conn latency 4267 hci_stack->le_minimum_ce_length, // min ce length 4268 hci_stack->le_maximum_ce_length // max ce length 4269 ); 4270 connection->state = SENT_CREATE_CONNECTION; 4271 #endif 4272 #endif 4273 break; 4274 } 4275 return true; 4276 4277 #ifdef ENABLE_CLASSIC 4278 case RECEIVED_CONNECTION_REQUEST: 4279 connection->role = HCI_ROLE_SLAVE; 4280 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4281 log_info("sending hci_accept_connection_request"); 4282 connection->state = ACCEPTED_CONNECTION_REQUEST; 4283 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4284 } 4285 return true; 4286 #endif 4287 4288 #ifdef ENABLE_BLE 4289 #ifdef ENABLE_LE_CENTRAL 4290 case SEND_CANCEL_CONNECTION: 4291 connection->state = SENT_CANCEL_CONNECTION; 4292 hci_send_cmd(&hci_le_create_connection_cancel); 4293 return true; 4294 #endif 4295 #endif 4296 case SEND_DISCONNECT: 4297 connection->state = SENT_DISCONNECT; 4298 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4299 return true; 4300 4301 default: 4302 break; 4303 } 4304 4305 // no further commands if connection is about to get shut down 4306 if (connection->state == SENT_DISCONNECT) continue; 4307 4308 if (connection->authentication_flags & READ_RSSI){ 4309 connectionClearAuthenticationFlags(connection, READ_RSSI); 4310 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4311 return true; 4312 } 4313 4314 #ifdef ENABLE_CLASSIC 4315 4316 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4317 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4318 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4319 return true; 4320 } 4321 4322 // Handling link key request requires remote supported features 4323 if ( ((connection->authentication_flags & HANDLE_LINK_KEY_REQUEST) != 0) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4324 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4325 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4326 4327 link_key_t link_key; 4328 link_key_type_t link_key_type; 4329 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 4330 4331 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4332 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4333 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 4334 if (sc_downgrade){ 4335 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4336 connection->state = SENT_DISCONNECT; 4337 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4338 return true; 4339 } 4340 4341 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 4342 if (have_link_key && security_level_sufficient){ 4343 connection->link_key_type = link_key_type; 4344 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 4345 } else { 4346 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4347 } 4348 return true; 4349 } 4350 4351 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4352 log_info("denying to pin request"); 4353 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4354 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4355 return true; 4356 } 4357 4358 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4359 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4360 // set authentication requirements: 4361 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4362 // - BONDING MODE: Dedicated if requested, otherwise bondable flag 4363 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4364 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4365 authreq |= 1; 4366 } 4367 if (connection->bonding_flags & BONDING_DEDICATED){ 4368 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4369 } else if (hci_stack->bondable){ 4370 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4371 } 4372 uint8_t have_oob_data = 0; 4373 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4374 if (connection->classic_oob_c_192 != NULL){ 4375 have_oob_data |= 1; 4376 } 4377 if (connection->classic_oob_c_256 != NULL){ 4378 have_oob_data |= 2; 4379 } 4380 #endif 4381 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4382 return true; 4383 } 4384 4385 if (connection->authentication_flags & SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4386 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4387 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4388 return true; 4389 } 4390 4391 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4392 if (connection->authentication_flags & SEND_REMOTE_OOB_DATA_REPLY){ 4393 connectionClearAuthenticationFlags(connection, SEND_REMOTE_OOB_DATA_REPLY); 4394 const uint8_t zero[16] = { 0 }; 4395 const uint8_t * r_192 = zero; 4396 const uint8_t * c_192 = zero; 4397 const uint8_t * r_256 = zero; 4398 const uint8_t * c_256 = zero; 4399 // verify P-256 OOB 4400 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4401 c_256 = connection->classic_oob_c_256; 4402 if (connection->classic_oob_r_256 != NULL) { 4403 r_256 = connection->classic_oob_r_256; 4404 } 4405 } 4406 // verify P-192 OOB 4407 if ((connection->classic_oob_c_192 != NULL)) { 4408 c_192 = connection->classic_oob_c_192; 4409 if (connection->classic_oob_r_192 != NULL) { 4410 r_192 = connection->classic_oob_r_192; 4411 } 4412 } 4413 // Reply 4414 if (c_256 != zero) { 4415 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4416 } else if (c_192 != zero){ 4417 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4418 } else { 4419 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4420 } 4421 return true; 4422 } 4423 #endif 4424 4425 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4426 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4427 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4428 return true; 4429 } 4430 4431 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4432 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4433 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4434 return true; 4435 } 4436 4437 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4438 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4439 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4440 return true; 4441 } 4442 4443 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4444 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4445 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4446 return true; 4447 } 4448 4449 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4450 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4451 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4452 return true; 4453 } 4454 4455 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4456 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4457 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4458 connection->state = SENT_DISCONNECT; 4459 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4460 return true; 4461 } 4462 4463 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4464 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4465 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4466 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4467 return true; 4468 } 4469 4470 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4471 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4472 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4473 return true; 4474 } 4475 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4476 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4477 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4478 return true; 4479 } 4480 #endif 4481 4482 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4483 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4484 if (connection->state != SENT_DISCONNECT){ 4485 connection->state = SENT_DISCONNECT; 4486 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4487 return true; 4488 } 4489 } 4490 4491 #ifdef ENABLE_CLASSIC 4492 uint16_t sniff_min_interval; 4493 switch (connection->sniff_min_interval){ 4494 case 0: 4495 break; 4496 case 0xffff: 4497 connection->sniff_min_interval = 0; 4498 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4499 return true; 4500 default: 4501 sniff_min_interval = connection->sniff_min_interval; 4502 connection->sniff_min_interval = 0; 4503 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4504 return true; 4505 } 4506 4507 if (connection->sniff_subrating_max_latency != 0xffff){ 4508 uint16_t max_latency = connection->sniff_subrating_max_latency; 4509 connection->sniff_subrating_max_latency = 0; 4510 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4511 return true; 4512 } 4513 4514 if (connection->qos_service_type != HCI_SERVICE_TyPE_INVALID){ 4515 uint8_t service_type = (uint8_t) connection->qos_service_type; 4516 connection->qos_service_type = HCI_SERVICE_TyPE_INVALID; 4517 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); 4518 return true; 4519 } 4520 4521 if (connection->request_role != HCI_ROLE_INVALID){ 4522 hci_role_t role = connection->request_role; 4523 connection->request_role = HCI_ROLE_INVALID; 4524 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4525 return true; 4526 } 4527 #endif 4528 4529 #ifdef ENABLE_BLE 4530 switch (connection->le_con_parameter_update_state){ 4531 // response to L2CAP CON PARAMETER UPDATE REQUEST 4532 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4533 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4534 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4535 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4536 0x0000, 0xffff); 4537 return true; 4538 case CON_PARAMETER_UPDATE_REPLY: 4539 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4540 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4541 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4542 0x0000, 0xffff); 4543 return true; 4544 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4545 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4546 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4547 return true; 4548 default: 4549 break; 4550 } 4551 if (connection->le_phy_update_all_phys != 0xffu){ 4552 uint8_t all_phys = connection->le_phy_update_all_phys; 4553 connection->le_phy_update_all_phys = 0xff; 4554 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); 4555 return true; 4556 } 4557 #endif 4558 } 4559 return false; 4560 } 4561 4562 static void hci_run(void){ 4563 4564 bool done; 4565 4566 // send continuation fragments first, as they block the prepared packet buffer 4567 done = hci_run_acl_fragments(); 4568 if (done) return; 4569 4570 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4571 // send host num completed packets next as they don't require num_cmd_packets > 0 4572 if (!hci_can_send_comand_packet_transport()) return; 4573 if (hci_stack->host_completed_packets){ 4574 hci_host_num_completed_packets(); 4575 return; 4576 } 4577 #endif 4578 4579 if (!hci_can_send_command_packet_now()) return; 4580 4581 // global/non-connection oriented commands 4582 4583 4584 #ifdef ENABLE_CLASSIC 4585 // general gap classic 4586 done = hci_run_general_gap_classic(); 4587 if (done) return; 4588 #endif 4589 4590 #ifdef ENABLE_BLE 4591 // general gap le 4592 done = hci_run_general_gap_le(); 4593 if (done) return; 4594 #endif 4595 4596 // send pending HCI commands 4597 done = hci_run_general_pending_commands(); 4598 if (done) return; 4599 4600 // stack state sub statemachines 4601 hci_connection_t * connection; 4602 switch (hci_stack->state){ 4603 case HCI_STATE_INITIALIZING: 4604 hci_initializing_run(); 4605 break; 4606 4607 case HCI_STATE_HALTING: 4608 4609 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4610 switch (hci_stack->substate){ 4611 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4612 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4613 4614 #ifdef ENABLE_BLE 4615 #ifdef ENABLE_LE_CENTRAL 4616 // free whitelist entries 4617 { 4618 btstack_linked_list_iterator_t lit; 4619 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4620 while (btstack_linked_list_iterator_has_next(&lit)){ 4621 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4622 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4623 btstack_memory_whitelist_entry_free(entry); 4624 } 4625 } 4626 #endif 4627 #endif 4628 // close all open connections 4629 connection = (hci_connection_t *) hci_stack->connections; 4630 if (connection){ 4631 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4632 if (!hci_can_send_command_packet_now()) return; 4633 4634 // check state 4635 if (connection->state == SENT_DISCONNECT) return; 4636 connection->state = SENT_DISCONNECT; 4637 4638 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4639 4640 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4641 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4642 4643 // ... which would be ignored anyway as we shutdown (free) the connection now 4644 hci_shutdown_connection(connection); 4645 4646 // finally, send the disconnect command 4647 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4648 return; 4649 } 4650 4651 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4652 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4653 log_info("HCI_STATE_HALTING: wait 50 ms"); 4654 hci_stack->substate = HCI_HALTING_W4_TIMER; 4655 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4656 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4657 btstack_run_loop_add_timer(&hci_stack->timeout); 4658 break; 4659 } 4660 4661 /* fall through */ 4662 4663 case HCI_HALTING_CLOSE: 4664 log_info("HCI_STATE_HALTING, calling off"); 4665 4666 // switch mode 4667 hci_power_control_off(); 4668 4669 log_info("HCI_STATE_HALTING, emitting state"); 4670 hci_emit_state(); 4671 log_info("HCI_STATE_HALTING, done"); 4672 break; 4673 4674 case HCI_HALTING_W4_TIMER: 4675 // keep waiting 4676 4677 break; 4678 default: 4679 break; 4680 } 4681 4682 break; 4683 4684 case HCI_STATE_FALLING_ASLEEP: 4685 switch(hci_stack->substate) { 4686 case HCI_FALLING_ASLEEP_DISCONNECT: 4687 log_info("HCI_STATE_FALLING_ASLEEP"); 4688 // close all open connections 4689 connection = (hci_connection_t *) hci_stack->connections; 4690 4691 #ifdef HAVE_PLATFORM_IPHONE_OS 4692 // don't close connections, if H4 supports power management 4693 if (btstack_control_iphone_power_management_enabled()){ 4694 connection = NULL; 4695 } 4696 #endif 4697 if (connection){ 4698 4699 // send disconnect 4700 if (!hci_can_send_command_packet_now()) return; 4701 4702 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4703 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4704 4705 // send disconnected event right away - causes higher layer connections to get closed, too. 4706 hci_shutdown_connection(connection); 4707 return; 4708 } 4709 4710 if (hci_classic_supported()){ 4711 // disable page and inquiry scan 4712 if (!hci_can_send_command_packet_now()) return; 4713 4714 log_info("HCI_STATE_HALTING, disabling inq scans"); 4715 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4716 4717 // continue in next sub state 4718 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4719 break; 4720 } 4721 4722 /* fall through */ 4723 4724 case HCI_FALLING_ASLEEP_COMPLETE: 4725 log_info("HCI_STATE_HALTING, calling sleep"); 4726 #ifdef HAVE_PLATFORM_IPHONE_OS 4727 // don't actually go to sleep, if H4 supports power management 4728 if (btstack_control_iphone_power_management_enabled()){ 4729 // SLEEP MODE reached 4730 hci_stack->state = HCI_STATE_SLEEPING; 4731 hci_emit_state(); 4732 break; 4733 } 4734 #endif 4735 // switch mode 4736 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4737 hci_emit_state(); 4738 break; 4739 4740 default: 4741 break; 4742 } 4743 break; 4744 4745 default: 4746 break; 4747 } 4748 } 4749 4750 int hci_send_cmd_packet(uint8_t *packet, int size){ 4751 // house-keeping 4752 4753 #ifdef ENABLE_CLASSIC 4754 bd_addr_t addr; 4755 hci_connection_t * conn; 4756 #endif 4757 #ifdef ENABLE_LE_CENTRAL 4758 uint8_t initiator_filter_policy; 4759 #endif 4760 4761 uint16_t opcode = little_endian_read_16(packet, 0); 4762 switch (opcode) { 4763 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4764 hci_stack->loopback_mode = packet[3]; 4765 break; 4766 4767 #ifdef ENABLE_CLASSIC 4768 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4769 reverse_bd_addr(&packet[3], addr); 4770 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4771 4772 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4773 if (!conn) { 4774 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4775 if (!conn) { 4776 // notify client that alloc failed 4777 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4778 return -1; // packet not sent to controller 4779 } 4780 conn->state = SEND_CREATE_CONNECTION; 4781 conn->role = HCI_ROLE_MASTER; 4782 } 4783 log_info("conn state %u", conn->state); 4784 switch (conn->state) { 4785 // if connection active exists 4786 case OPEN: 4787 // and OPEN, emit connection complete command 4788 hci_emit_connection_complete(addr, conn->con_handle, 0); 4789 return -1; // packet not sent to controller 4790 case RECEIVED_DISCONNECTION_COMPLETE: 4791 // create connection triggered in disconnect complete event, let's do it now 4792 break; 4793 case SEND_CREATE_CONNECTION: 4794 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4795 break; 4796 default: 4797 // otherwise, just ignore as it is already in the open process 4798 return -1; // packet not sent to controller 4799 } 4800 conn->state = SENT_CREATE_CONNECTION; 4801 4802 // track outgoing connection 4803 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4804 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4805 break; 4806 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4807 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4808 break; 4809 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4810 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4811 break; 4812 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4813 if (hci_stack->link_key_db) { 4814 reverse_bd_addr(&packet[3], addr); 4815 hci_stack->link_key_db->delete_link_key(addr); 4816 } 4817 break; 4818 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4819 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4820 reverse_bd_addr(&packet[3], addr); 4821 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4822 if (conn) { 4823 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4824 } 4825 break; 4826 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4827 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4828 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4829 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4830 reverse_bd_addr(&packet[3], addr); 4831 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4832 if (conn) { 4833 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4834 } 4835 break; 4836 4837 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 4838 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4839 // setup_synchronous_connection? Voice setting at offset 22 4840 // TODO: compare to current setting if sco connection already active 4841 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4842 break; 4843 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4844 // accept_synchronus_connection? Voice setting at offset 18 4845 // TODO: compare to current setting if sco connection already active 4846 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4847 break; 4848 #endif 4849 #endif 4850 4851 #ifdef ENABLE_BLE 4852 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4853 hci_stack->le_random_address_set = 1; 4854 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4855 break; 4856 #ifdef ENABLE_LE_PERIPHERAL 4857 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4858 hci_stack->le_advertisements_active = packet[3] != 0; 4859 break; 4860 #endif 4861 #ifdef ENABLE_LE_CENTRAL 4862 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4863 // white list used? 4864 initiator_filter_policy = packet[7]; 4865 switch (initiator_filter_policy) { 4866 case 0: 4867 // whitelist not used 4868 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4869 break; 4870 case 1: 4871 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4872 break; 4873 default: 4874 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4875 break; 4876 } 4877 // track outgoing connection 4878 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 4879 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 4880 break; 4881 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4882 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 4883 break; 4884 #endif 4885 #endif 4886 default: 4887 break; 4888 } 4889 4890 hci_stack->num_cmd_packets--; 4891 4892 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4893 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4894 } 4895 4896 // disconnect because of security block 4897 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4898 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4899 if (!connection) return; 4900 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4901 } 4902 4903 4904 // Configure Secure Simple Pairing 4905 4906 #ifdef ENABLE_CLASSIC 4907 4908 // enable will enable SSP during init 4909 void gap_ssp_set_enable(int enable){ 4910 hci_stack->ssp_enable = enable; 4911 } 4912 4913 static int hci_local_ssp_activated(void){ 4914 return gap_ssp_supported() && hci_stack->ssp_enable; 4915 } 4916 4917 // if set, BTstack will respond to io capability request using authentication requirement 4918 void gap_ssp_set_io_capability(int io_capability){ 4919 hci_stack->ssp_io_capability = io_capability; 4920 } 4921 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4922 hci_stack->ssp_authentication_requirement = authentication_requirement; 4923 } 4924 4925 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4926 void gap_ssp_set_auto_accept(int auto_accept){ 4927 hci_stack->ssp_auto_accept = auto_accept; 4928 } 4929 4930 void gap_secure_connections_enable(bool enable){ 4931 hci_stack->secure_connections_enable = enable; 4932 } 4933 4934 #endif 4935 4936 // va_list part of hci_send_cmd 4937 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4938 if (!hci_can_send_command_packet_now()){ 4939 log_error("hci_send_cmd called but cannot send packet now"); 4940 return 0; 4941 } 4942 4943 // for HCI INITIALIZATION 4944 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4945 hci_stack->last_cmd_opcode = cmd->opcode; 4946 4947 hci_reserve_packet_buffer(); 4948 uint8_t * packet = hci_stack->hci_packet_buffer; 4949 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4950 int err = hci_send_cmd_packet(packet, size); 4951 4952 // release packet buffer on error or for synchronous transport implementations 4953 if ((err < 0) || hci_transport_synchronous()){ 4954 hci_release_packet_buffer(); 4955 hci_emit_transport_packet_sent(); 4956 } 4957 4958 return err; 4959 } 4960 4961 /** 4962 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4963 */ 4964 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4965 va_list argptr; 4966 va_start(argptr, cmd); 4967 int res = hci_send_cmd_va_arg(cmd, argptr); 4968 va_end(argptr); 4969 return res; 4970 } 4971 4972 // Create various non-HCI events. 4973 // TODO: generalize, use table similar to hci_create_command 4974 4975 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4976 // dump packet 4977 if (dump) { 4978 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4979 } 4980 4981 // dispatch to all event handlers 4982 btstack_linked_list_iterator_t it; 4983 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4984 while (btstack_linked_list_iterator_has_next(&it)){ 4985 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4986 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4987 } 4988 } 4989 4990 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4991 if (!hci_stack->acl_packet_handler) return; 4992 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4993 } 4994 4995 #ifdef ENABLE_CLASSIC 4996 static void hci_notify_if_sco_can_send_now(void){ 4997 // notify SCO sender if waiting 4998 if (!hci_stack->sco_waiting_for_can_send_now) return; 4999 if (hci_can_send_sco_packet_now()){ 5000 hci_stack->sco_waiting_for_can_send_now = 0; 5001 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5002 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5003 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5004 } 5005 } 5006 5007 // parsing end emitting has been merged to reduce code size 5008 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5009 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 5010 5011 uint8_t * eir_data; 5012 ad_context_t context; 5013 const uint8_t * name; 5014 uint8_t name_len; 5015 5016 if (size < 3) return; 5017 5018 int event_type = hci_event_packet_get_type(packet); 5019 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5020 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5021 5022 switch (event_type){ 5023 case HCI_EVENT_INQUIRY_RESULT: 5024 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5025 if (size != (3 + (num_responses * 14))) return; 5026 break; 5027 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5028 if (size != 257) return; 5029 if (num_responses != 1) return; 5030 break; 5031 default: 5032 return; 5033 } 5034 5035 // event[1] is set at the end 5036 int i; 5037 for (i=0; i<num_responses;i++){ 5038 memset(event, 0, sizeof(event)); 5039 event[0] = GAP_EVENT_INQUIRY_RESULT; 5040 uint8_t event_size = 18; // if name is not set by EIR 5041 5042 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5043 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5044 (void)memcpy(&event[9], 5045 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5046 3); // class of device 5047 (void)memcpy(&event[12], 5048 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5049 2); // clock offset 5050 5051 switch (event_type){ 5052 case HCI_EVENT_INQUIRY_RESULT: 5053 // 14,15,16,17 = 0, size 18 5054 break; 5055 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5056 event[14] = 1; 5057 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5058 // 16,17 = 0, size 18 5059 break; 5060 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5061 event[14] = 1; 5062 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5063 // EIR packets only contain a single inquiry response 5064 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5065 name = NULL; 5066 // Iterate over EIR data 5067 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5068 uint8_t data_type = ad_iterator_get_data_type(&context); 5069 uint8_t data_size = ad_iterator_get_data_len(&context); 5070 const uint8_t * data = ad_iterator_get_data(&context); 5071 // Prefer Complete Local Name over Shortend Local Name 5072 switch (data_type){ 5073 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5074 if (name) continue; 5075 /* fall through */ 5076 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5077 name = data; 5078 name_len = data_size; 5079 break; 5080 default: 5081 break; 5082 } 5083 } 5084 if (name){ 5085 event[16] = 1; 5086 // truncate name if needed 5087 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5088 event[17] = len; 5089 (void)memcpy(&event[18], name, len); 5090 event_size += len; 5091 } 5092 break; 5093 default: 5094 return; 5095 } 5096 event[1] = event_size - 2; 5097 hci_emit_event(event, event_size, 1); 5098 } 5099 } 5100 #endif 5101 5102 void hci_emit_state(void){ 5103 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5104 uint8_t event[3]; 5105 event[0] = BTSTACK_EVENT_STATE; 5106 event[1] = sizeof(event) - 2u; 5107 event[2] = hci_stack->state; 5108 hci_emit_event(event, sizeof(event), 1); 5109 } 5110 5111 #ifdef ENABLE_CLASSIC 5112 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5113 uint8_t event[13]; 5114 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5115 event[1] = sizeof(event) - 2; 5116 event[2] = status; 5117 little_endian_store_16(event, 3, con_handle); 5118 reverse_bd_addr(address, &event[5]); 5119 event[11] = 1; // ACL connection 5120 event[12] = 0; // encryption disabled 5121 hci_emit_event(event, sizeof(event), 1); 5122 } 5123 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5124 if (disable_l2cap_timeouts) return; 5125 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5126 uint8_t event[4]; 5127 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5128 event[1] = sizeof(event) - 2; 5129 little_endian_store_16(event, 2, conn->con_handle); 5130 hci_emit_event(event, sizeof(event), 1); 5131 } 5132 #endif 5133 5134 #ifdef ENABLE_BLE 5135 #ifdef ENABLE_LE_CENTRAL 5136 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){ 5137 uint8_t event[21]; 5138 event[0] = HCI_EVENT_LE_META; 5139 event[1] = sizeof(event) - 2u; 5140 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5141 event[3] = status; 5142 little_endian_store_16(event, 4, con_handle); 5143 event[6] = 0; // TODO: role 5144 event[7] = address_type; 5145 reverse_bd_addr(address, &event[8]); 5146 little_endian_store_16(event, 14, 0); // interval 5147 little_endian_store_16(event, 16, 0); // latency 5148 little_endian_store_16(event, 18, 0); // supervision timeout 5149 event[20] = 0; // master clock accuracy 5150 hci_emit_event(event, sizeof(event), 1); 5151 } 5152 #endif 5153 #endif 5154 5155 static void hci_emit_transport_packet_sent(void){ 5156 // notify upper stack that it might be possible to send again 5157 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5158 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5159 } 5160 5161 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5162 uint8_t event[6]; 5163 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5164 event[1] = sizeof(event) - 2u; 5165 event[2] = 0; // status = OK 5166 little_endian_store_16(event, 3, con_handle); 5167 event[5] = reason; 5168 hci_emit_event(event, sizeof(event), 1); 5169 } 5170 5171 static void hci_emit_nr_connections_changed(void){ 5172 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5173 uint8_t event[3]; 5174 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5175 event[1] = sizeof(event) - 2u; 5176 event[2] = nr_hci_connections(); 5177 hci_emit_event(event, sizeof(event), 1); 5178 } 5179 5180 static void hci_emit_hci_open_failed(void){ 5181 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5182 uint8_t event[2]; 5183 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5184 event[1] = sizeof(event) - 2u; 5185 hci_emit_event(event, sizeof(event), 1); 5186 } 5187 5188 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5189 log_info("hci_emit_dedicated_bonding_result %u ", status); 5190 uint8_t event[9]; 5191 int pos = 0; 5192 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5193 event[pos++] = sizeof(event) - 2u; 5194 event[pos++] = status; 5195 reverse_bd_addr(address, &event[pos]); 5196 hci_emit_event(event, sizeof(event), 1); 5197 } 5198 5199 5200 #ifdef ENABLE_CLASSIC 5201 5202 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5203 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5204 uint8_t event[5]; 5205 int pos = 0; 5206 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5207 event[pos++] = sizeof(event) - 2; 5208 little_endian_store_16(event, 2, con_handle); 5209 pos += 2; 5210 event[pos++] = level; 5211 hci_emit_event(event, sizeof(event), 1); 5212 } 5213 5214 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5215 if (!connection) return LEVEL_0; 5216 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5217 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5218 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5219 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5220 // LEVEL 4 always requires 128 bit encrytion key size 5221 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5222 security_level = LEVEL_3; 5223 } 5224 return security_level; 5225 } 5226 5227 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5228 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5229 uint8_t event[3]; 5230 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5231 event[1] = sizeof(event) - 2; 5232 event[2] = enabled; 5233 hci_emit_event(event, sizeof(event), 1); 5234 } 5235 5236 // query if remote side supports eSCO 5237 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5238 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5239 if (!connection) return 0; 5240 return (connection->remote_supported_features[0] & 1) != 0; 5241 } 5242 5243 static bool hci_ssp_supported(hci_connection_t * connection){ 5244 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5245 return (connection->bonding_flags & mask) == mask; 5246 } 5247 5248 // query if remote side supports SSP 5249 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5250 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5251 if (!connection) return 0; 5252 return hci_ssp_supported(connection) ? 1 : 0; 5253 } 5254 5255 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5256 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5257 } 5258 5259 // GAP API 5260 /** 5261 * @bbrief enable/disable bonding. default is enabled 5262 * @praram enabled 5263 */ 5264 void gap_set_bondable_mode(int enable){ 5265 hci_stack->bondable = enable ? 1 : 0; 5266 } 5267 /** 5268 * @brief Get bondable mode. 5269 * @return 1 if bondable 5270 */ 5271 int gap_get_bondable_mode(void){ 5272 return hci_stack->bondable; 5273 } 5274 5275 /** 5276 * @brief map link keys to security levels 5277 */ 5278 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5279 switch (link_key_type){ 5280 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5281 return LEVEL_4; 5282 case COMBINATION_KEY: 5283 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5284 return LEVEL_3; 5285 default: 5286 return LEVEL_2; 5287 } 5288 } 5289 5290 /** 5291 * @brief map link keys to secure connection yes/no 5292 */ 5293 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5294 switch (link_key_type){ 5295 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5296 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5297 return 1; 5298 default: 5299 return 0; 5300 } 5301 } 5302 5303 /** 5304 * @brief map link keys to authenticated 5305 */ 5306 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5307 switch (link_key_type){ 5308 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5309 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5310 return 1; 5311 default: 5312 return 0; 5313 } 5314 } 5315 5316 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5317 log_info("gap_mitm_protection_required_for_security_level %u", level); 5318 return level > LEVEL_2; 5319 } 5320 5321 /** 5322 * @brief get current security level 5323 */ 5324 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5325 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5326 if (!connection) return LEVEL_0; 5327 return gap_security_level_for_connection(connection); 5328 } 5329 5330 /** 5331 * @brief request connection to device to 5332 * @result GAP_AUTHENTICATION_RESULT 5333 */ 5334 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5335 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5336 if (!connection){ 5337 hci_emit_security_level(con_handle, LEVEL_0); 5338 return; 5339 } 5340 5341 btstack_assert(hci_is_le_connection(connection) == false); 5342 5343 gap_security_level_t current_level = gap_security_level(con_handle); 5344 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5345 requested_level, connection->requested_security_level, current_level); 5346 5347 // assumption: earlier requested security higher than current level => security request is active 5348 if (current_level < connection->requested_security_level){ 5349 if (connection->requested_security_level < requested_level){ 5350 // increase requested level as new level is higher 5351 5352 // TODO: handle re-authentication when done 5353 5354 connection->requested_security_level = requested_level; 5355 } 5356 return; 5357 } 5358 5359 // no request active, notify if security sufficient 5360 if (requested_level <= current_level){ 5361 hci_emit_security_level(con_handle, current_level); 5362 return; 5363 } 5364 5365 // store request 5366 connection->requested_security_level = requested_level; 5367 5368 // start to authenticate connection if authentication not already active 5369 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 5370 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5371 hci_run(); 5372 } 5373 5374 /** 5375 * @brief start dedicated bonding with device. disconnect after bonding 5376 * @param device 5377 * @param request MITM protection 5378 * @result GAP_DEDICATED_BONDING_COMPLETE 5379 */ 5380 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5381 5382 // create connection state machine 5383 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5384 5385 if (!connection){ 5386 return BTSTACK_MEMORY_ALLOC_FAILED; 5387 } 5388 5389 // delete linkn key 5390 gap_drop_link_key_for_bd_addr(device); 5391 5392 // configure LEVEL_2/3, dedicated bonding 5393 connection->state = SEND_CREATE_CONNECTION; 5394 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5395 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5396 connection->bonding_flags = BONDING_DEDICATED; 5397 5398 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5399 5400 // handle: connnection failure (connection complete != ok) 5401 // handle: authentication failure 5402 // handle: disconnect on done 5403 5404 hci_run(); 5405 5406 return 0; 5407 } 5408 #endif 5409 5410 void gap_set_local_name(const char * local_name){ 5411 hci_stack->local_name = local_name; 5412 } 5413 5414 5415 #ifdef ENABLE_BLE 5416 5417 #ifdef ENABLE_LE_CENTRAL 5418 void gap_start_scan(void){ 5419 hci_stack->le_scanning_enabled = true; 5420 hci_run(); 5421 } 5422 5423 void gap_stop_scan(void){ 5424 hci_stack->le_scanning_enabled = false; 5425 hci_run(); 5426 } 5427 5428 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5429 hci_stack->le_scan_type = scan_type; 5430 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5431 hci_stack->le_scan_interval = scan_interval; 5432 hci_stack->le_scan_window = scan_window; 5433 hci_stack->le_scanning_param_update = true; 5434 hci_run(); 5435 } 5436 5437 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5438 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5439 } 5440 5441 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5442 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5443 if (!conn){ 5444 // disallow if le connection is already outgoing 5445 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5446 log_error("le connection already active"); 5447 return ERROR_CODE_COMMAND_DISALLOWED; 5448 } 5449 5450 log_info("gap_connect: no connection exists yet, creating context"); 5451 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5452 if (!conn){ 5453 // notify client that alloc failed 5454 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5455 log_info("gap_connect: failed to alloc hci_connection_t"); 5456 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5457 } 5458 5459 // set le connecting state 5460 if (hci_is_le_connection_type(addr_type)){ 5461 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5462 } 5463 5464 conn->state = SEND_CREATE_CONNECTION; 5465 log_info("gap_connect: send create connection next"); 5466 hci_run(); 5467 return ERROR_CODE_SUCCESS; 5468 } 5469 5470 if (!hci_is_le_connection(conn) || 5471 (conn->state == SEND_CREATE_CONNECTION) || 5472 (conn->state == SENT_CREATE_CONNECTION)) { 5473 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5474 log_error("gap_connect: classic connection or connect is already being created"); 5475 return GATT_CLIENT_IN_WRONG_STATE; 5476 } 5477 5478 // check if connection was just disconnected 5479 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5480 log_info("gap_connect: send create connection (again)"); 5481 conn->state = SEND_CREATE_CONNECTION; 5482 hci_run(); 5483 return ERROR_CODE_SUCCESS; 5484 } 5485 5486 log_info("gap_connect: context exists with state %u", conn->state); 5487 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5488 hci_run(); 5489 return ERROR_CODE_SUCCESS; 5490 } 5491 5492 // @assumption: only a single outgoing LE Connection exists 5493 static hci_connection_t * gap_get_outgoing_connection(void){ 5494 btstack_linked_item_t *it; 5495 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5496 hci_connection_t * conn = (hci_connection_t *) it; 5497 if (!hci_is_le_connection(conn)) continue; 5498 switch (conn->state){ 5499 case SEND_CREATE_CONNECTION: 5500 case SENT_CREATE_CONNECTION: 5501 case SENT_CANCEL_CONNECTION: 5502 return conn; 5503 default: 5504 break; 5505 }; 5506 } 5507 return NULL; 5508 } 5509 5510 uint8_t gap_connect_cancel(void){ 5511 hci_connection_t * conn = gap_get_outgoing_connection(); 5512 if (!conn) return 0; 5513 switch (conn->state){ 5514 case SEND_CREATE_CONNECTION: 5515 // skip sending create connection and emit event instead 5516 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5517 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5518 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5519 btstack_memory_hci_connection_free( conn ); 5520 break; 5521 case SENT_CREATE_CONNECTION: 5522 // request to send cancel connection 5523 conn->state = SEND_CANCEL_CONNECTION; 5524 hci_run(); 5525 break; 5526 default: 5527 break; 5528 } 5529 return 0; 5530 } 5531 #endif 5532 5533 #ifdef ENABLE_LE_CENTRAL 5534 /** 5535 * @brief Set connection parameters for outgoing connections 5536 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5537 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5538 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5539 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5540 * @param conn_latency, default: 4 5541 * @param supervision_timeout (unit: 10ms), default: 720 ms 5542 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5543 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5544 */ 5545 5546 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5547 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5548 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5549 hci_stack->le_connection_scan_interval = conn_scan_interval; 5550 hci_stack->le_connection_scan_window = conn_scan_window; 5551 hci_stack->le_connection_interval_min = conn_interval_min; 5552 hci_stack->le_connection_interval_max = conn_interval_max; 5553 hci_stack->le_connection_latency = conn_latency; 5554 hci_stack->le_supervision_timeout = supervision_timeout; 5555 hci_stack->le_minimum_ce_length = min_ce_length; 5556 hci_stack->le_maximum_ce_length = max_ce_length; 5557 } 5558 #endif 5559 5560 /** 5561 * @brief Updates the connection parameters for a given LE connection 5562 * @param handle 5563 * @param conn_interval_min (unit: 1.25ms) 5564 * @param conn_interval_max (unit: 1.25ms) 5565 * @param conn_latency 5566 * @param supervision_timeout (unit: 10ms) 5567 * @returns 0 if ok 5568 */ 5569 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5570 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5571 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5572 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5573 connection->le_conn_interval_min = conn_interval_min; 5574 connection->le_conn_interval_max = conn_interval_max; 5575 connection->le_conn_latency = conn_latency; 5576 connection->le_supervision_timeout = supervision_timeout; 5577 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5578 hci_run(); 5579 return 0; 5580 } 5581 5582 /** 5583 * @brief Request an update of the connection parameter for a given LE connection 5584 * @param handle 5585 * @param conn_interval_min (unit: 1.25ms) 5586 * @param conn_interval_max (unit: 1.25ms) 5587 * @param conn_latency 5588 * @param supervision_timeout (unit: 10ms) 5589 * @returns 0 if ok 5590 */ 5591 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5592 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5593 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5594 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5595 connection->le_conn_interval_min = conn_interval_min; 5596 connection->le_conn_interval_max = conn_interval_max; 5597 connection->le_conn_latency = conn_latency; 5598 connection->le_supervision_timeout = supervision_timeout; 5599 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5600 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5601 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5602 return 0; 5603 } 5604 5605 #ifdef ENABLE_LE_PERIPHERAL 5606 5607 /** 5608 * @brief Set Advertisement Data 5609 * @param advertising_data_length 5610 * @param advertising_data (max 31 octets) 5611 * @note data is not copied, pointer has to stay valid 5612 */ 5613 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5614 hci_stack->le_advertisements_data_len = advertising_data_length; 5615 hci_stack->le_advertisements_data = advertising_data; 5616 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5617 hci_run(); 5618 } 5619 5620 /** 5621 * @brief Set Scan Response Data 5622 * @param advertising_data_length 5623 * @param advertising_data (max 31 octets) 5624 * @note data is not copied, pointer has to stay valid 5625 */ 5626 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5627 hci_stack->le_scan_response_data_len = scan_response_data_length; 5628 hci_stack->le_scan_response_data = scan_response_data; 5629 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5630 hci_run(); 5631 } 5632 5633 /** 5634 * @brief Set Advertisement Parameters 5635 * @param adv_int_min 5636 * @param adv_int_max 5637 * @param adv_type 5638 * @param direct_address_type 5639 * @param direct_address 5640 * @param channel_map 5641 * @param filter_policy 5642 * 5643 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5644 */ 5645 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5646 uint8_t direct_address_typ, bd_addr_t direct_address, 5647 uint8_t channel_map, uint8_t filter_policy) { 5648 5649 hci_stack->le_advertisements_interval_min = adv_int_min; 5650 hci_stack->le_advertisements_interval_max = adv_int_max; 5651 hci_stack->le_advertisements_type = adv_type; 5652 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5653 hci_stack->le_advertisements_channel_map = channel_map; 5654 hci_stack->le_advertisements_filter_policy = filter_policy; 5655 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5656 6); 5657 5658 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5659 hci_run(); 5660 } 5661 5662 /** 5663 * @brief Enable/Disable Advertisements 5664 * @param enabled 5665 */ 5666 void gap_advertisements_enable(int enabled){ 5667 hci_stack->le_advertisements_enabled = enabled != 0; 5668 hci_update_advertisements_enabled_for_current_roles(); 5669 hci_run(); 5670 } 5671 5672 #endif 5673 5674 void hci_le_set_own_address_type(uint8_t own_address_type){ 5675 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5676 if (own_address_type == hci_stack->le_own_addr_type) return; 5677 hci_stack->le_own_addr_type = own_address_type; 5678 5679 #ifdef ENABLE_LE_PERIPHERAL 5680 // update advertisement parameters, too 5681 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5682 hci_run(); 5683 #endif 5684 #ifdef ENABLE_LE_CENTRAL 5685 // note: we don't update scan parameters or modify ongoing connection attempts 5686 #endif 5687 } 5688 5689 #endif 5690 5691 uint8_t gap_disconnect(hci_con_handle_t handle){ 5692 hci_connection_t * conn = hci_connection_for_handle(handle); 5693 if (!conn){ 5694 hci_emit_disconnection_complete(handle, 0); 5695 return 0; 5696 } 5697 // ignore if already disconnected 5698 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5699 return 0; 5700 } 5701 conn->state = SEND_DISCONNECT; 5702 hci_run(); 5703 return 0; 5704 } 5705 5706 int gap_read_rssi(hci_con_handle_t con_handle){ 5707 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5708 if (hci_connection == NULL) return 0; 5709 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5710 hci_run(); 5711 return 1; 5712 } 5713 5714 /** 5715 * @brief Get connection type 5716 * @param con_handle 5717 * @result connection_type 5718 */ 5719 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5720 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5721 if (!conn) return GAP_CONNECTION_INVALID; 5722 switch (conn->address_type){ 5723 case BD_ADDR_TYPE_LE_PUBLIC: 5724 case BD_ADDR_TYPE_LE_RANDOM: 5725 return GAP_CONNECTION_LE; 5726 case BD_ADDR_TYPE_SCO: 5727 return GAP_CONNECTION_SCO; 5728 case BD_ADDR_TYPE_ACL: 5729 return GAP_CONNECTION_ACL; 5730 default: 5731 return GAP_CONNECTION_INVALID; 5732 } 5733 } 5734 5735 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5736 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5737 if (!conn) return HCI_ROLE_INVALID; 5738 return (hci_role_t) conn->role; 5739 } 5740 5741 5742 #ifdef ENABLE_CLASSIC 5743 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5744 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5745 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5746 conn->request_role = role; 5747 hci_run(); 5748 return ERROR_CODE_SUCCESS; 5749 } 5750 #endif 5751 5752 #ifdef ENABLE_BLE 5753 5754 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){ 5755 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5756 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5757 5758 conn->le_phy_update_all_phys = all_phys; 5759 conn->le_phy_update_tx_phys = tx_phys; 5760 conn->le_phy_update_rx_phys = rx_phys; 5761 conn->le_phy_update_phy_options = phy_options; 5762 5763 hci_run(); 5764 5765 return 0; 5766 } 5767 5768 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5769 // check if already in list 5770 btstack_linked_list_iterator_t it; 5771 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5772 while (btstack_linked_list_iterator_has_next(&it)) { 5773 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5774 if (entry->address_type != address_type) { 5775 continue; 5776 } 5777 if (memcmp(entry->address, address, 6) != 0) { 5778 continue; 5779 } 5780 // disallow if already scheduled to add 5781 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5782 return ERROR_CODE_COMMAND_DISALLOWED; 5783 } 5784 // still on controller, but scheduled to remove -> re-add 5785 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5786 return ERROR_CODE_SUCCESS; 5787 } 5788 // alloc and add to list 5789 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5790 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5791 entry->address_type = address_type; 5792 (void)memcpy(entry->address, address, 6); 5793 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5794 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5795 return ERROR_CODE_SUCCESS; 5796 } 5797 5798 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5799 btstack_linked_list_iterator_t it; 5800 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5801 while (btstack_linked_list_iterator_has_next(&it)){ 5802 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5803 if (entry->address_type != address_type) { 5804 continue; 5805 } 5806 if (memcmp(entry->address, address, 6) != 0) { 5807 continue; 5808 } 5809 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5810 // remove from controller if already present 5811 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5812 } else { 5813 // directly remove entry from whitelist 5814 btstack_linked_list_iterator_remove(&it); 5815 btstack_memory_whitelist_entry_free(entry); 5816 } 5817 return ERROR_CODE_SUCCESS; 5818 } 5819 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5820 } 5821 5822 static void hci_whitelist_clear(void){ 5823 btstack_linked_list_iterator_t it; 5824 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5825 while (btstack_linked_list_iterator_has_next(&it)){ 5826 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5827 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5828 // remove from controller if already present 5829 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5830 continue; 5831 } 5832 // directly remove entry from whitelist 5833 btstack_linked_list_iterator_remove(&it); 5834 btstack_memory_whitelist_entry_free(entry); 5835 } 5836 } 5837 5838 /** 5839 * @brief Clear Whitelist 5840 * @returns 0 if ok 5841 */ 5842 uint8_t gap_whitelist_clear(void){ 5843 hci_whitelist_clear(); 5844 hci_run(); 5845 return ERROR_CODE_SUCCESS; 5846 } 5847 5848 /** 5849 * @brief Add Device to Whitelist 5850 * @param address_typ 5851 * @param address 5852 * @returns 0 if ok 5853 */ 5854 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5855 uint8_t status = hci_whitelist_add(address_type, address); 5856 if (status){ 5857 return status; 5858 } 5859 hci_run(); 5860 return ERROR_CODE_SUCCESS; 5861 } 5862 5863 /** 5864 * @brief Remove Device from Whitelist 5865 * @param address_typ 5866 * @param address 5867 * @returns 0 if ok 5868 */ 5869 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5870 uint8_t status = hci_whitelist_remove(address_type, address); 5871 if (status){ 5872 return status; 5873 } 5874 hci_run(); 5875 return ERROR_CODE_SUCCESS; 5876 } 5877 5878 #ifdef ENABLE_LE_CENTRAL 5879 /** 5880 * @brief Connect with Whitelist 5881 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 5882 * @returns - if ok 5883 */ 5884 uint8_t gap_connect_with_whitelist(void){ 5885 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5886 return ERROR_CODE_COMMAND_DISALLOWED; 5887 } 5888 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5889 hci_run(); 5890 return ERROR_CODE_SUCCESS; 5891 } 5892 5893 /** 5894 * @brief Auto Connection Establishment - Start Connecting to device 5895 * @param address_typ 5896 * @param address 5897 * @returns 0 if ok 5898 */ 5899 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 5900 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5901 return ERROR_CODE_COMMAND_DISALLOWED; 5902 } 5903 5904 uint8_t status = hci_whitelist_add(address_type, address); 5905 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 5906 return status; 5907 } 5908 5909 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5910 5911 hci_run(); 5912 return ERROR_CODE_SUCCESS; 5913 } 5914 5915 /** 5916 * @brief Auto Connection Establishment - Stop Connecting to device 5917 * @param address_typ 5918 * @param address 5919 * @returns 0 if ok 5920 */ 5921 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 5922 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5923 return ERROR_CODE_COMMAND_DISALLOWED; 5924 } 5925 5926 hci_whitelist_remove(address_type, address); 5927 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 5928 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5929 } 5930 hci_run(); 5931 return 0; 5932 } 5933 5934 /** 5935 * @brief Auto Connection Establishment - Stop everything 5936 * @note Convenience function to stop all active auto connection attempts 5937 */ 5938 uint8_t gap_auto_connection_stop_all(void){ 5939 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 5940 return ERROR_CODE_COMMAND_DISALLOWED; 5941 } 5942 hci_whitelist_clear(); 5943 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5944 hci_run(); 5945 return ERROR_CODE_SUCCESS; 5946 } 5947 5948 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5949 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5950 if (!conn) return 0; 5951 return conn->le_connection_interval; 5952 } 5953 #endif 5954 #endif 5955 5956 #ifdef ENABLE_CLASSIC 5957 /** 5958 * @brief Set Extended Inquiry Response data 5959 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5960 * @note has to be done before stack starts up 5961 */ 5962 void gap_set_extended_inquiry_response(const uint8_t * data){ 5963 hci_stack->eir_data = data; 5964 } 5965 5966 /** 5967 * @brief Start GAP Classic Inquiry 5968 * @param duration in 1.28s units 5969 * @return 0 if ok 5970 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5971 */ 5972 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5973 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5974 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5975 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5976 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5977 } 5978 hci_stack->inquiry_state = duration_in_1280ms_units; 5979 hci_run(); 5980 return 0; 5981 } 5982 5983 /** 5984 * @brief Stop GAP Classic Inquiry 5985 * @returns 0 if ok 5986 */ 5987 int gap_inquiry_stop(void){ 5988 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5989 // emit inquiry complete event, before it even started 5990 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5991 hci_emit_event(event, sizeof(event), 1); 5992 return 0; 5993 } 5994 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5995 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5996 hci_run(); 5997 return 0; 5998 } 5999 6000 void gap_inquiry_set_lap(uint32_t lap){ 6001 hci_stack->inquiry_lap = lap; 6002 } 6003 6004 6005 /** 6006 * @brief Remote Name Request 6007 * @param addr 6008 * @param page_scan_repetition_mode 6009 * @param clock_offset only used when bit 15 is set 6010 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6011 */ 6012 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6013 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6014 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6015 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6016 hci_stack->remote_name_clock_offset = clock_offset; 6017 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6018 hci_run(); 6019 return 0; 6020 } 6021 6022 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6023 hci_stack->gap_pairing_state = state; 6024 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6025 hci_run(); 6026 return 0; 6027 } 6028 6029 /** 6030 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6031 * @param addr 6032 * @param pin_data 6033 * @param pin_len 6034 * @return 0 if ok 6035 */ 6036 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6037 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6038 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6039 hci_stack->gap_pairing_pin_len = pin_len; 6040 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6041 } 6042 6043 /** 6044 * @brief Legacy Pairing Pin Code Response 6045 * @param addr 6046 * @param pin 6047 * @return 0 if ok 6048 */ 6049 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6050 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6051 } 6052 6053 /** 6054 * @brief Abort Legacy Pairing 6055 * @param addr 6056 * @param pin 6057 * @return 0 if ok 6058 */ 6059 int gap_pin_code_negative(bd_addr_t addr){ 6060 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6061 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6062 } 6063 6064 /** 6065 * @brief SSP Passkey Response 6066 * @param addr 6067 * @param passkey 6068 * @return 0 if ok 6069 */ 6070 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6071 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6072 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6073 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6074 } 6075 6076 /** 6077 * @brief Abort SSP Passkey Entry/Pairing 6078 * @param addr 6079 * @param pin 6080 * @return 0 if ok 6081 */ 6082 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6083 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6084 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6085 } 6086 6087 /** 6088 * @brief Accept SSP Numeric Comparison 6089 * @param addr 6090 * @param passkey 6091 * @return 0 if ok 6092 */ 6093 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6094 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6095 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6096 } 6097 6098 /** 6099 * @brief Abort SSP Numeric Comparison/Pairing 6100 * @param addr 6101 * @param pin 6102 * @return 0 if ok 6103 */ 6104 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6105 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6106 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6107 } 6108 6109 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6110 6111 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6112 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6113 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6114 connectionSetAuthenticationFlags(conn, flag); 6115 hci_run(); 6116 return ERROR_CODE_SUCCESS; 6117 } 6118 6119 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6120 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_REPLY); 6121 } 6122 6123 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6124 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6125 } 6126 #endif 6127 6128 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6129 /** 6130 * @brief Report Remote OOB Data 6131 * @param bd_addr 6132 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6133 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6134 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6135 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6136 */ 6137 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){ 6138 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6139 if (connection == NULL) { 6140 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6141 } 6142 connection->classic_oob_c_192 = c_192; 6143 connection->classic_oob_r_192 = r_192; 6144 connection->classic_oob_c_256 = c_256; 6145 connection->classic_oob_r_256 = r_256; 6146 return ERROR_CODE_SUCCESS; 6147 } 6148 /** 6149 * @brief Generate new OOB data 6150 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6151 */ 6152 void gap_ssp_generate_oob_data(void){ 6153 hci_stack->classic_read_local_oob_data = true; 6154 hci_run(); 6155 } 6156 6157 #endif 6158 6159 /** 6160 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6161 * @param inquiry_mode see bluetooth_defines.h 6162 */ 6163 void hci_set_inquiry_mode(inquiry_mode_t mode){ 6164 hci_stack->inquiry_mode = mode; 6165 } 6166 6167 /** 6168 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6169 */ 6170 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6171 hci_stack->sco_voice_setting = voice_setting; 6172 } 6173 6174 /** 6175 * @brief Get SCO Voice Setting 6176 * @return current voice setting 6177 */ 6178 uint16_t hci_get_sco_voice_setting(void){ 6179 return hci_stack->sco_voice_setting; 6180 } 6181 6182 static int hci_have_usb_transport(void){ 6183 if (!hci_stack->hci_transport) return 0; 6184 const char * transport_name = hci_stack->hci_transport->name; 6185 if (!transport_name) return 0; 6186 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6187 } 6188 6189 /** @brief Get SCO packet length for current SCO Voice setting 6190 * @note Using SCO packets of the exact length is required for USB transfer 6191 * @return Length of SCO packets in bytes (not audio frames) 6192 */ 6193 int hci_get_sco_packet_length(void){ 6194 int sco_packet_length = 0; 6195 6196 #ifdef ENABLE_SCO_OVER_HCI 6197 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6198 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6199 6200 if (hci_have_usb_transport()){ 6201 // see Core Spec for H2 USB Transfer. 6202 // 3 byte SCO header + 24 bytes per connection 6203 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6204 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6205 } else { 6206 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6207 sco_packet_length = 3 + 60 * multiplier; 6208 // assert that it still fits inside an SCO buffer 6209 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6210 sco_packet_length = 3 + 60; 6211 } 6212 } 6213 #endif 6214 6215 #ifdef HAVE_SCO_TRANSPORT 6216 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6217 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6218 sco_packet_length = 3 + 60 * multiplier; 6219 #endif 6220 return sco_packet_length; 6221 } 6222 6223 /** 6224 * @brief Sets the master/slave policy 6225 * @param policy (0: attempt to become master, 1: let connecting device decide) 6226 */ 6227 void hci_set_master_slave_policy(uint8_t policy){ 6228 hci_stack->master_slave_policy = policy; 6229 } 6230 6231 #endif 6232 6233 HCI_STATE hci_get_state(void){ 6234 return hci_stack->state; 6235 } 6236 6237 #ifdef ENABLE_CLASSIC 6238 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6239 hci_stack->gap_classic_accept_callback = accept_callback; 6240 } 6241 #endif 6242 6243 /** 6244 * @brief Set callback for Bluetooth Hardware Error 6245 */ 6246 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6247 hci_stack->hardware_error_callback = fn; 6248 } 6249 6250 void hci_disconnect_all(void){ 6251 btstack_linked_list_iterator_t it; 6252 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6253 while (btstack_linked_list_iterator_has_next(&it)){ 6254 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6255 if (con->state == SENT_DISCONNECT) continue; 6256 con->state = SEND_DISCONNECT; 6257 } 6258 hci_run(); 6259 } 6260 6261 uint16_t hci_get_manufacturer(void){ 6262 return hci_stack->manufacturer; 6263 } 6264 6265 #ifdef ENABLE_BLE 6266 6267 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6268 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6269 if (!hci_con) return NULL; 6270 return &hci_con->sm_connection; 6271 } 6272 6273 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6274 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6275 6276 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6277 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6278 if (hci_connection == NULL) return 0; 6279 if (hci_is_le_connection(hci_connection)){ 6280 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6281 if (sm_conn->sm_connection_encrypted) { 6282 return sm_conn->sm_actual_encryption_key_size; 6283 } 6284 } 6285 #ifdef ENABLE_CLASSIC 6286 else { 6287 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 6288 return hci_connection->encryption_key_size; 6289 } 6290 } 6291 #endif 6292 return 0; 6293 } 6294 6295 int gap_authenticated(hci_con_handle_t con_handle){ 6296 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6297 if (hci_connection == NULL) return 0; 6298 6299 switch (hci_connection->address_type){ 6300 case BD_ADDR_TYPE_LE_PUBLIC: 6301 case BD_ADDR_TYPE_LE_RANDOM: 6302 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6303 return hci_connection->sm_connection.sm_connection_authenticated; 6304 #ifdef ENABLE_CLASSIC 6305 case BD_ADDR_TYPE_SCO: 6306 case BD_ADDR_TYPE_ACL: 6307 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6308 #endif 6309 default: 6310 return 0; 6311 } 6312 } 6313 6314 int gap_secure_connection(hci_con_handle_t con_handle){ 6315 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6316 if (hci_connection == NULL) return 0; 6317 6318 switch (hci_connection->address_type){ 6319 case BD_ADDR_TYPE_LE_PUBLIC: 6320 case BD_ADDR_TYPE_LE_RANDOM: 6321 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6322 return hci_connection->sm_connection.sm_connection_sc; 6323 #ifdef ENABLE_CLASSIC 6324 case BD_ADDR_TYPE_SCO: 6325 case BD_ADDR_TYPE_ACL: 6326 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6327 #endif 6328 default: 6329 return 0; 6330 } 6331 } 6332 6333 bool gap_bonded(hci_con_handle_t con_handle){ 6334 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6335 if (hci_connection == NULL) return 0; 6336 6337 #ifdef ENABLE_CLASSIC 6338 link_key_t link_key; 6339 link_key_type_t link_key_type; 6340 #endif 6341 switch (hci_connection->address_type){ 6342 case BD_ADDR_TYPE_LE_PUBLIC: 6343 case BD_ADDR_TYPE_LE_RANDOM: 6344 return hci_connection->sm_connection.sm_le_db_index >= 0; 6345 #ifdef ENABLE_CLASSIC 6346 case BD_ADDR_TYPE_SCO: 6347 case BD_ADDR_TYPE_ACL: 6348 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6349 #endif 6350 default: 6351 return false; 6352 } 6353 } 6354 6355 6356 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6357 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6358 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6359 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6360 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6361 return sm_conn->sm_connection_authorization_state; 6362 } 6363 #endif 6364 6365 #ifdef ENABLE_CLASSIC 6366 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){ 6367 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6368 if (!conn) return GAP_CONNECTION_INVALID; 6369 conn->sniff_min_interval = sniff_min_interval; 6370 conn->sniff_max_interval = sniff_max_interval; 6371 conn->sniff_attempt = sniff_attempt; 6372 conn->sniff_timeout = sniff_timeout; 6373 hci_run(); 6374 return 0; 6375 } 6376 6377 /** 6378 * @brief Exit Sniff mode 6379 * @param con_handle 6380 @ @return 0 if ok 6381 */ 6382 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6383 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6384 if (!conn) return GAP_CONNECTION_INVALID; 6385 conn->sniff_min_interval = 0xffff; 6386 hci_run(); 6387 return 0; 6388 } 6389 6390 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){ 6391 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6392 if (!conn) return GAP_CONNECTION_INVALID; 6393 conn->sniff_subrating_max_latency = max_latency; 6394 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6395 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6396 hci_run(); 6397 return ERROR_CODE_SUCCESS; 6398 } 6399 6400 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){ 6401 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6402 if (!conn) return GAP_CONNECTION_INVALID; 6403 conn->qos_service_type = service_type; 6404 conn->qos_token_rate = token_rate; 6405 conn->qos_peak_bandwidth = peak_bandwidth; 6406 conn->qos_latency = latency; 6407 conn->qos_delay_variation = delay_variation; 6408 hci_run(); 6409 return ERROR_CODE_SUCCESS; 6410 } 6411 6412 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6413 hci_stack->new_page_scan_interval = page_scan_interval; 6414 hci_stack->new_page_scan_window = page_scan_window; 6415 hci_run(); 6416 } 6417 6418 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6419 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6420 hci_run(); 6421 } 6422 6423 #endif 6424 6425 void hci_halting_defer(void){ 6426 if (hci_stack->state != HCI_STATE_HALTING) return; 6427 switch (hci_stack->substate){ 6428 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6429 case HCI_HALTING_CLOSE: 6430 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6431 break; 6432 default: 6433 break; 6434 } 6435 } 6436 6437 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6438 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6439 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6440 if (le_device_db_index >= le_device_db_max_count()) return; 6441 uint8_t offset = le_device_db_index >> 3; 6442 uint8_t mask = 1 << (le_device_db_index & 7); 6443 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6444 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6445 // note: go back to remove entries, otherwise, a remove + add will skip the add 6446 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6447 } 6448 } 6449 6450 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6451 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6452 if (le_device_db_index >= le_device_db_max_count()) return; 6453 uint8_t offset = le_device_db_index >> 3; 6454 uint8_t mask = 1 << (le_device_db_index & 7); 6455 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6456 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6457 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6458 } 6459 } 6460 6461 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6462 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6463 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6464 } 6465 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6466 // restart le resolving list update 6467 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6468 } 6469 return ERROR_CODE_SUCCESS; 6470 } 6471 #endif 6472 6473 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6474 void hci_setup_test_connections_fuzz(void){ 6475 hci_connection_t * conn; 6476 6477 // default address: 66:55:44:33:00:01 6478 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6479 6480 // setup Controller info 6481 hci_stack->num_cmd_packets = 255; 6482 hci_stack->acl_packets_total_num = 255; 6483 6484 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6485 addr[5] = 0x01; 6486 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6487 conn->con_handle = addr[5]; 6488 conn->role = HCI_ROLE_SLAVE; 6489 conn->state = RECEIVED_CONNECTION_REQUEST; 6490 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6491 6492 // setup incoming Classic SCO connection with con handle 0x0002 6493 addr[5] = 0x02; 6494 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6495 conn->con_handle = addr[5]; 6496 conn->role = HCI_ROLE_SLAVE; 6497 conn->state = RECEIVED_CONNECTION_REQUEST; 6498 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6499 6500 // setup ready Classic ACL connection with con handle 0x0003 6501 addr[5] = 0x03; 6502 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6503 conn->con_handle = addr[5]; 6504 conn->role = HCI_ROLE_SLAVE; 6505 conn->state = OPEN; 6506 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6507 6508 // setup ready Classic SCO connection with con handle 0x0004 6509 addr[5] = 0x04; 6510 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6511 conn->con_handle = addr[5]; 6512 conn->role = HCI_ROLE_SLAVE; 6513 conn->state = OPEN; 6514 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6515 6516 // setup ready LE ACL connection with con handle 0x005 and public address 6517 addr[5] = 0x05; 6518 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6519 conn->con_handle = addr[5]; 6520 conn->role = HCI_ROLE_SLAVE; 6521 conn->state = OPEN; 6522 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6523 conn->sm_connection.sm_connection_encrypted = 1; 6524 } 6525 6526 void hci_free_connections_fuzz(void){ 6527 btstack_linked_list_iterator_t it; 6528 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6529 while (btstack_linked_list_iterator_has_next(&it)){ 6530 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6531 btstack_linked_list_iterator_remove(&it); 6532 btstack_memory_hci_connection_free(con); 6533 } 6534 } 6535 void hci_simulate_working_fuzz(void){ 6536 hci_init_done(); 6537 hci_stack->num_cmd_packets = 255; 6538 } 6539 #endif 6540