1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #include "ble/le_device_db.h" 63 #endif 64 65 #include <stdarg.h> 66 #include <string.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 98 #endif 99 100 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 101 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 102 #endif 103 104 #define HCI_CONNECTION_TIMEOUT_MS 10000 105 106 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 107 #define HCI_RESET_RESEND_TIMEOUT_MS 200 108 #endif 109 110 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 111 #ifndef GAP_INQUIRY_MAX_NAME_LEN 112 #define GAP_INQUIRY_MAX_NAME_LEN 32 113 #endif 114 115 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 116 #define GAP_INQUIRY_DURATION_MIN 0x01 117 #define GAP_INQUIRY_DURATION_MAX 0x30 118 #define GAP_INQUIRY_STATE_IDLE 0x00 119 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 120 #define GAP_INQUIRY_STATE_ACTIVE 0x81 121 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 122 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 123 124 // GAP Remote Name Request 125 #define GAP_REMOTE_NAME_STATE_IDLE 0 126 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 127 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 128 129 // GAP Pairing 130 #define GAP_PAIRING_STATE_IDLE 0 131 #define GAP_PAIRING_STATE_SEND_PIN 1 132 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 133 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 134 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 135 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 136 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 137 138 139 // prototypes 140 #ifdef ENABLE_CLASSIC 141 static void hci_update_scan_enable(void); 142 static void hci_emit_discoverable_enabled(uint8_t enabled); 143 static int hci_local_ssp_activated(void); 144 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 145 static bool hci_ssp_supported(hci_connection_t * connection); 146 static void hci_notify_if_sco_can_send_now(void); 147 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 148 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 149 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 150 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 151 static void hci_connection_timestamp(hci_connection_t *connection); 152 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 153 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 154 #endif 155 156 static int hci_power_control_on(void); 157 static void hci_power_control_off(void); 158 static void hci_state_reset(void); 159 static void hci_emit_transport_packet_sent(void); 160 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 161 static void hci_emit_nr_connections_changed(void); 162 static void hci_emit_hci_open_failed(void); 163 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 164 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 165 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 166 static void hci_run(void); 167 static int hci_is_le_connection(hci_connection_t * connection); 168 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 169 170 #ifdef ENABLE_CLASSIC 171 static int hci_have_usb_transport(void); 172 #endif 173 174 #ifdef ENABLE_BLE 175 #ifdef ENABLE_LE_CENTRAL 176 // called from test/ble_client/advertising_data_parser.c 177 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 178 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 179 static hci_connection_t * gap_get_outgoing_connection(void); 180 #endif 181 #endif 182 183 // the STACK is here 184 #ifndef HAVE_MALLOC 185 static hci_stack_t hci_stack_static; 186 #endif 187 static hci_stack_t * hci_stack = NULL; 188 189 #ifdef ENABLE_CLASSIC 190 // default name 191 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 192 193 // test helper 194 static uint8_t disable_l2cap_timeouts = 0; 195 #endif 196 197 /** 198 * create connection for given address 199 * 200 * @return connection OR NULL, if no memory left 201 */ 202 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 203 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 204 hci_connection_t * conn = btstack_memory_hci_connection_get(); 205 if (!conn) return NULL; 206 bd_addr_copy(conn->address, addr); 207 conn->role = HCI_ROLE_INVALID; 208 conn->address_type = addr_type; 209 conn->con_handle = 0xffff; 210 conn->authentication_flags = AUTH_FLAGS_NONE; 211 conn->bonding_flags = 0; 212 conn->requested_security_level = LEVEL_0; 213 #ifdef ENABLE_CLASSIC 214 conn->request_role = HCI_ROLE_INVALID; 215 conn->sniff_subrating_max_latency = 0xffff; 216 conn->qos_service_type = HCI_SERVICE_TyPE_INVALID; 217 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 218 btstack_run_loop_set_timer_context(&conn->timeout, conn); 219 hci_connection_timestamp(conn); 220 #endif 221 conn->acl_recombination_length = 0; 222 conn->acl_recombination_pos = 0; 223 conn->num_packets_sent = 0; 224 225 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 226 #ifdef ENABLE_BLE 227 conn->le_phy_update_all_phys = 0xff; 228 #endif 229 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 230 conn->le_max_tx_octets = 27; 231 #endif 232 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 233 return conn; 234 } 235 236 237 /** 238 * get le connection parameter range 239 * 240 * @return le connection parameter range struct 241 */ 242 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 243 *range = hci_stack->le_connection_parameter_range; 244 } 245 246 /** 247 * set le connection parameter range 248 * 249 */ 250 251 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 252 hci_stack->le_connection_parameter_range = *range; 253 } 254 255 /** 256 * @brief Test if connection parameters are inside in existing rage 257 * @param conn_interval_min (unit: 1.25ms) 258 * @param conn_interval_max (unit: 1.25ms) 259 * @param conn_latency 260 * @param supervision_timeout (unit: 10ms) 261 * @returns 1 if included 262 */ 263 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 264 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 265 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 266 267 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 268 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 269 270 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 271 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 272 273 return 1; 274 } 275 276 /** 277 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 278 * @note: default: 1 279 * @param max_peripheral_connections 280 */ 281 #ifdef ENABLE_LE_PERIPHERAL 282 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 283 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 284 } 285 #endif 286 287 /** 288 * get hci connections iterator 289 * 290 * @return hci connections iterator 291 */ 292 293 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 294 btstack_linked_list_iterator_init(it, &hci_stack->connections); 295 } 296 297 /** 298 * get connection for a given handle 299 * 300 * @return connection OR NULL, if not found 301 */ 302 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 303 btstack_linked_list_iterator_t it; 304 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 305 while (btstack_linked_list_iterator_has_next(&it)){ 306 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 307 if ( item->con_handle == con_handle ) { 308 return item; 309 } 310 } 311 return NULL; 312 } 313 314 /** 315 * get connection for given address 316 * 317 * @return connection OR NULL, if not found 318 */ 319 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 320 btstack_linked_list_iterator_t it; 321 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 322 while (btstack_linked_list_iterator_has_next(&it)){ 323 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 324 if (connection->address_type != addr_type) continue; 325 if (memcmp(addr, connection->address, 6) != 0) continue; 326 return connection; 327 } 328 return NULL; 329 } 330 331 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 332 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 333 } 334 335 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 336 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 337 } 338 339 #ifdef ENABLE_CLASSIC 340 341 #ifdef ENABLE_SCO_OVER_HCI 342 static int hci_number_sco_connections(void){ 343 int connections = 0; 344 btstack_linked_list_iterator_t it; 345 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 346 while (btstack_linked_list_iterator_has_next(&it)){ 347 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 348 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 349 connections++; 350 } 351 return connections; 352 } 353 #endif 354 355 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 356 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 357 #ifdef HAVE_EMBEDDED_TICK 358 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 359 // connections might be timed out 360 hci_emit_l2cap_check_timeout(connection); 361 } 362 #else 363 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 364 // connections might be timed out 365 hci_emit_l2cap_check_timeout(connection); 366 } 367 #endif 368 } 369 370 static void hci_connection_timestamp(hci_connection_t *connection){ 371 #ifdef HAVE_EMBEDDED_TICK 372 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 373 #else 374 connection->timestamp = btstack_run_loop_get_time_ms(); 375 #endif 376 } 377 378 /** 379 * add authentication flags and reset timer 380 * @note: assumes classic connection 381 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 382 */ 383 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 384 bd_addr_t addr; 385 reverse_bd_addr(bd_addr, addr); 386 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 387 if (conn) { 388 connectionSetAuthenticationFlags(conn, flags); 389 hci_connection_timestamp(conn); 390 } 391 } 392 393 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 394 hci_connection_t * conn = hci_connection_for_handle(handle); 395 if (!conn) return 0; 396 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 397 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 398 return 0; 399 } 400 401 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 402 if (!hci_stack->link_key_db) return; 403 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 404 hci_stack->link_key_db->delete_link_key(addr); 405 } 406 407 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 408 if (!hci_stack->link_key_db) return; 409 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 410 hci_stack->link_key_db->put_link_key(addr, link_key, type); 411 } 412 413 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 414 if (!hci_stack->link_key_db) return false; 415 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 416 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 417 return result; 418 } 419 420 void gap_delete_all_link_keys(void){ 421 bd_addr_t addr; 422 link_key_t link_key; 423 link_key_type_t type; 424 btstack_link_key_iterator_t it; 425 int ok = gap_link_key_iterator_init(&it); 426 if (!ok) { 427 log_error("could not initialize iterator"); 428 return; 429 } 430 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 431 gap_drop_link_key_for_bd_addr(addr); 432 } 433 gap_link_key_iterator_done(&it); 434 } 435 436 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 437 if (!hci_stack->link_key_db) return 0; 438 if (!hci_stack->link_key_db->iterator_init) return 0; 439 return hci_stack->link_key_db->iterator_init(it); 440 } 441 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 442 if (!hci_stack->link_key_db) return 0; 443 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 444 } 445 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 446 if (!hci_stack->link_key_db) return; 447 hci_stack->link_key_db->iterator_done(it); 448 } 449 #endif 450 451 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 452 switch (address_type){ 453 case BD_ADDR_TYPE_LE_PUBLIC: 454 case BD_ADDR_TYPE_LE_RANDOM: 455 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 456 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 457 return true; 458 default: 459 return false; 460 } 461 } 462 463 static int hci_is_le_connection(hci_connection_t * connection){ 464 return hci_is_le_connection_type(connection->address_type); 465 } 466 467 /** 468 * count connections 469 */ 470 static int nr_hci_connections(void){ 471 int count = 0; 472 btstack_linked_item_t *it; 473 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 474 count++; 475 } 476 return count; 477 } 478 479 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 480 481 unsigned int num_packets_sent_classic = 0; 482 unsigned int num_packets_sent_le = 0; 483 484 btstack_linked_item_t *it; 485 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 486 hci_connection_t * connection = (hci_connection_t *) it; 487 if (hci_is_le_connection(connection)){ 488 num_packets_sent_le += connection->num_packets_sent; 489 } 490 if (connection->address_type == BD_ADDR_TYPE_ACL){ 491 num_packets_sent_classic += connection->num_packets_sent; 492 } 493 } 494 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 495 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 496 int free_slots_le = 0; 497 498 if (free_slots_classic < 0){ 499 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 500 return 0; 501 } 502 503 if (hci_stack->le_acl_packets_total_num){ 504 // if we have LE slots, they are used 505 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 506 if (free_slots_le < 0){ 507 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 508 return 0; 509 } 510 } else { 511 // otherwise, classic slots are used for LE, too 512 free_slots_classic -= num_packets_sent_le; 513 if (free_slots_classic < 0){ 514 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 515 return 0; 516 } 517 } 518 519 switch (address_type){ 520 case BD_ADDR_TYPE_UNKNOWN: 521 log_error("hci_number_free_acl_slots: unknown address type"); 522 return 0; 523 524 case BD_ADDR_TYPE_ACL: 525 return free_slots_classic; 526 527 default: 528 if (hci_stack->le_acl_packets_total_num){ 529 return free_slots_le; 530 } 531 return free_slots_classic; 532 } 533 } 534 535 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 536 // get connection type 537 hci_connection_t * connection = hci_connection_for_handle(con_handle); 538 if (!connection){ 539 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 540 return 0; 541 } 542 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 543 } 544 545 #ifdef ENABLE_CLASSIC 546 static int hci_number_free_sco_slots(void){ 547 unsigned int num_sco_packets_sent = 0; 548 btstack_linked_item_t *it; 549 if (hci_stack->synchronous_flow_control_enabled){ 550 // explicit flow control 551 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 552 hci_connection_t * connection = (hci_connection_t *) it; 553 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 554 num_sco_packets_sent += connection->num_packets_sent; 555 } 556 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 557 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 558 return 0; 559 } 560 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 561 } else { 562 // implicit flow control -- TODO 563 int num_ready = 0; 564 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 565 hci_connection_t * connection = (hci_connection_t *) it; 566 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 567 if (connection->sco_tx_ready == 0) continue; 568 num_ready++; 569 } 570 return num_ready; 571 } 572 } 573 #endif 574 575 // only used to send HCI Host Number Completed Packets 576 static int hci_can_send_comand_packet_transport(void){ 577 if (hci_stack->hci_packet_buffer_reserved) return 0; 578 579 // check for async hci transport implementations 580 if (hci_stack->hci_transport->can_send_packet_now){ 581 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 582 return 0; 583 } 584 } 585 return 1; 586 } 587 588 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 589 int hci_can_send_command_packet_now(void){ 590 if (hci_can_send_comand_packet_transport() == 0) return 0; 591 return hci_stack->num_cmd_packets > 0u; 592 } 593 594 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 595 // check for async hci transport implementations 596 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 597 return hci_stack->hci_transport->can_send_packet_now(packet_type); 598 } 599 600 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 601 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 602 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 603 } 604 605 int hci_can_send_acl_le_packet_now(void){ 606 if (hci_stack->hci_packet_buffer_reserved) return 0; 607 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 608 } 609 610 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 611 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 612 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 613 } 614 615 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 616 if (hci_stack->hci_packet_buffer_reserved) return 0; 617 return hci_can_send_prepared_acl_packet_now(con_handle); 618 } 619 620 #ifdef ENABLE_CLASSIC 621 int hci_can_send_acl_classic_packet_now(void){ 622 if (hci_stack->hci_packet_buffer_reserved) return 0; 623 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 624 } 625 626 int hci_can_send_prepared_sco_packet_now(void){ 627 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 628 if (hci_have_usb_transport()){ 629 return hci_stack->sco_can_send_now; 630 } else { 631 return hci_number_free_sco_slots() > 0; 632 } 633 } 634 635 int hci_can_send_sco_packet_now(void){ 636 if (hci_stack->hci_packet_buffer_reserved) return 0; 637 return hci_can_send_prepared_sco_packet_now(); 638 } 639 640 void hci_request_sco_can_send_now_event(void){ 641 hci_stack->sco_waiting_for_can_send_now = 1; 642 hci_notify_if_sco_can_send_now(); 643 } 644 #endif 645 646 // used for internal checks in l2cap.c 647 int hci_is_packet_buffer_reserved(void){ 648 return hci_stack->hci_packet_buffer_reserved; 649 } 650 651 // reserves outgoing packet buffer. @returns 1 if successful 652 int hci_reserve_packet_buffer(void){ 653 if (hci_stack->hci_packet_buffer_reserved) { 654 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 655 return 0; 656 } 657 hci_stack->hci_packet_buffer_reserved = 1; 658 return 1; 659 } 660 661 void hci_release_packet_buffer(void){ 662 hci_stack->hci_packet_buffer_reserved = 0; 663 } 664 665 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 666 static int hci_transport_synchronous(void){ 667 return hci_stack->hci_transport->can_send_packet_now == NULL; 668 } 669 670 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 671 672 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 673 674 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 675 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 676 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 677 max_acl_data_packet_length = hci_stack->le_data_packets_length; 678 } 679 680 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 681 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 682 max_acl_data_packet_length = connection->le_max_tx_octets; 683 } 684 #endif 685 686 log_debug("hci_send_acl_packet_fragments entered"); 687 688 int err; 689 // multiple packets could be send on a synchronous HCI transport 690 while (true){ 691 692 log_debug("hci_send_acl_packet_fragments loop entered"); 693 694 // get current data 695 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 696 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 697 bool more_fragments = false; 698 699 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 700 if (current_acl_data_packet_length > max_acl_data_packet_length){ 701 more_fragments = true; 702 current_acl_data_packet_length = max_acl_data_packet_length; 703 } 704 705 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 706 if (acl_header_pos > 0u){ 707 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 708 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 709 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 710 } 711 712 // update header len 713 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 714 715 // count packet 716 connection->num_packets_sent++; 717 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 718 719 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 720 if (more_fragments){ 721 // update start of next fragment to send 722 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 723 } else { 724 // done 725 hci_stack->acl_fragmentation_pos = 0; 726 hci_stack->acl_fragmentation_total_size = 0; 727 } 728 729 // send packet 730 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 731 const int size = current_acl_data_packet_length + 4; 732 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 733 hci_stack->acl_fragmentation_tx_active = 1; 734 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 735 736 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 737 738 // done yet? 739 if (!more_fragments) break; 740 741 // can send more? 742 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 743 } 744 745 log_debug("hci_send_acl_packet_fragments loop over"); 746 747 // release buffer now for synchronous transport 748 if (hci_transport_synchronous()){ 749 hci_stack->acl_fragmentation_tx_active = 0; 750 hci_release_packet_buffer(); 751 hci_emit_transport_packet_sent(); 752 } 753 754 return err; 755 } 756 757 // pre: caller has reserved the packet buffer 758 int hci_send_acl_packet_buffer(int size){ 759 760 // log_info("hci_send_acl_packet_buffer size %u", size); 761 762 if (!hci_stack->hci_packet_buffer_reserved) { 763 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 764 return 0; 765 } 766 767 uint8_t * packet = hci_stack->hci_packet_buffer; 768 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 769 770 // check for free places on Bluetooth module 771 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 772 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 773 hci_release_packet_buffer(); 774 hci_emit_transport_packet_sent(); 775 return BTSTACK_ACL_BUFFERS_FULL; 776 } 777 778 hci_connection_t *connection = hci_connection_for_handle( con_handle); 779 if (!connection) { 780 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 781 hci_release_packet_buffer(); 782 hci_emit_transport_packet_sent(); 783 return 0; 784 } 785 786 #ifdef ENABLE_CLASSIC 787 hci_connection_timestamp(connection); 788 #endif 789 790 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 791 792 // setup data 793 hci_stack->acl_fragmentation_total_size = size; 794 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 795 796 return hci_send_acl_packet_fragments(connection); 797 } 798 799 #ifdef ENABLE_CLASSIC 800 // pre: caller has reserved the packet buffer 801 int hci_send_sco_packet_buffer(int size){ 802 803 // log_info("hci_send_acl_packet_buffer size %u", size); 804 805 if (!hci_stack->hci_packet_buffer_reserved) { 806 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 807 return 0; 808 } 809 810 uint8_t * packet = hci_stack->hci_packet_buffer; 811 812 // skip checks in loopback mode 813 if (!hci_stack->loopback_mode){ 814 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 815 816 // check for free places on Bluetooth module 817 if (!hci_can_send_prepared_sco_packet_now()) { 818 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 819 hci_release_packet_buffer(); 820 hci_emit_transport_packet_sent(); 821 return BTSTACK_ACL_BUFFERS_FULL; 822 } 823 824 // track send packet in connection struct 825 hci_connection_t *connection = hci_connection_for_handle( con_handle); 826 if (!connection) { 827 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 828 hci_release_packet_buffer(); 829 hci_emit_transport_packet_sent(); 830 return 0; 831 } 832 833 if (hci_have_usb_transport()){ 834 // token used 835 hci_stack->sco_can_send_now = 0; 836 } else { 837 if (hci_stack->synchronous_flow_control_enabled){ 838 connection->num_packets_sent++; 839 } else { 840 connection->sco_tx_ready--; 841 } 842 } 843 } 844 845 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 846 847 #ifdef HAVE_SCO_TRANSPORT 848 hci_stack->sco_transport->send_packet(packet, size); 849 hci_release_packet_buffer(); 850 hci_emit_transport_packet_sent(); 851 852 return 0; 853 #else 854 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 855 if (hci_transport_synchronous()){ 856 hci_release_packet_buffer(); 857 hci_emit_transport_packet_sent(); 858 } 859 860 return err; 861 #endif 862 } 863 #endif 864 865 static void acl_handler(uint8_t *packet, uint16_t size){ 866 867 // get info 868 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 869 hci_connection_t *conn = hci_connection_for_handle(con_handle); 870 uint8_t acl_flags = READ_ACL_FLAGS(packet); 871 uint16_t acl_length = READ_ACL_LENGTH(packet); 872 873 // ignore non-registered handle 874 if (!conn){ 875 log_error("acl_handler called with non-registered handle %u!" , con_handle); 876 return; 877 } 878 879 // assert packet is complete 880 if ((acl_length + 4u) != size){ 881 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 882 return; 883 } 884 885 #ifdef ENABLE_CLASSIC 886 // update idle timestamp 887 hci_connection_timestamp(conn); 888 #endif 889 890 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 891 hci_stack->host_completed_packets = 1; 892 conn->num_packets_completed++; 893 #endif 894 895 // handle different packet types 896 switch (acl_flags & 0x03u) { 897 898 case 0x01: // continuation fragment 899 900 // sanity checks 901 if (conn->acl_recombination_pos == 0u) { 902 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 903 return; 904 } 905 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 906 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 907 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 908 conn->acl_recombination_pos = 0; 909 return; 910 } 911 912 // append fragment payload (header already stored) 913 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 914 &packet[4], acl_length); 915 conn->acl_recombination_pos += acl_length; 916 917 // forward complete L2CAP packet if complete. 918 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 919 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 920 // reset recombination buffer 921 conn->acl_recombination_length = 0; 922 conn->acl_recombination_pos = 0; 923 } 924 break; 925 926 case 0x02: { // first fragment 927 928 // sanity check 929 if (conn->acl_recombination_pos) { 930 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 931 conn->acl_recombination_pos = 0; 932 } 933 934 // peek into L2CAP packet! 935 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 936 937 // compare fragment size to L2CAP packet size 938 if (acl_length >= (l2cap_length + 4u)){ 939 // forward fragment as L2CAP packet 940 hci_emit_acl_packet(packet, acl_length + 4u); 941 } else { 942 943 if (acl_length > HCI_ACL_BUFFER_SIZE){ 944 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 945 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 946 return; 947 } 948 949 // store first fragment and tweak acl length for complete package 950 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 951 packet, acl_length + 4u); 952 conn->acl_recombination_pos = acl_length + 4u; 953 conn->acl_recombination_length = l2cap_length; 954 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 955 } 956 break; 957 958 } 959 default: 960 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 961 return; 962 } 963 964 // execute main loop 965 hci_run(); 966 } 967 968 static void hci_shutdown_connection(hci_connection_t *conn){ 969 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 970 971 #ifdef ENABLE_CLASSIC 972 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 973 bd_addr_type_t addr_type = conn->address_type; 974 #endif 975 #ifdef HAVE_SCO_TRANSPORT 976 hci_con_handle_t con_handle = conn->con_handle; 977 #endif 978 #endif 979 980 btstack_run_loop_remove_timer(&conn->timeout); 981 982 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 983 btstack_memory_hci_connection_free( conn ); 984 985 // now it's gone 986 hci_emit_nr_connections_changed(); 987 988 #ifdef ENABLE_CLASSIC 989 #ifdef ENABLE_SCO_OVER_HCI 990 // update SCO 991 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 992 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 993 } 994 #endif 995 #ifdef HAVE_SCO_TRANSPORT 996 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 997 hci_stack->sco_transport->close(con_handle); 998 } 999 #endif 1000 #endif 1001 } 1002 1003 #ifdef ENABLE_CLASSIC 1004 1005 static const uint16_t packet_type_sizes[] = { 1006 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1007 HCI_ACL_DH1_SIZE, 0, 0, 0, 1008 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1009 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1010 }; 1011 static const uint8_t packet_type_feature_requirement_bit[] = { 1012 0, // 3 slot packets 1013 1, // 5 slot packets 1014 25, // EDR 2 mpbs 1015 26, // EDR 3 mbps 1016 39, // 3 slot EDR packts 1017 40, // 5 slot EDR packet 1018 }; 1019 static const uint16_t packet_type_feature_packet_mask[] = { 1020 0x0f00, // 3 slot packets 1021 0xf000, // 5 slot packets 1022 0x1102, // EDR 2 mpbs 1023 0x2204, // EDR 3 mbps 1024 0x0300, // 3 slot EDR packts 1025 0x3000, // 5 slot EDR packet 1026 }; 1027 1028 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1029 // enable packet types based on size 1030 uint16_t packet_types = 0; 1031 unsigned int i; 1032 for (i=0;i<16;i++){ 1033 if (packet_type_sizes[i] == 0) continue; 1034 if (packet_type_sizes[i] <= buffer_size){ 1035 packet_types |= 1 << i; 1036 } 1037 } 1038 // disable packet types due to missing local supported features 1039 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1040 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1041 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1042 if (feature_set) continue; 1043 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1044 packet_types &= ~packet_type_feature_packet_mask[i]; 1045 } 1046 // flip bits for "may not be used" 1047 packet_types ^= 0x3306; 1048 return packet_types; 1049 } 1050 1051 uint16_t hci_usable_acl_packet_types(void){ 1052 return hci_stack->packet_types; 1053 } 1054 #endif 1055 1056 uint8_t* hci_get_outgoing_packet_buffer(void){ 1057 // hci packet buffer is >= acl data packet length 1058 return hci_stack->hci_packet_buffer; 1059 } 1060 1061 uint16_t hci_max_acl_data_packet_length(void){ 1062 return hci_stack->acl_data_packet_length; 1063 } 1064 1065 #ifdef ENABLE_CLASSIC 1066 int hci_extended_sco_link_supported(void){ 1067 // No. 31, byte 3, bit 7 1068 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1069 } 1070 #endif 1071 1072 int hci_non_flushable_packet_boundary_flag_supported(void){ 1073 // No. 54, byte 6, bit 6 1074 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1075 } 1076 1077 static int gap_ssp_supported(void){ 1078 // No. 51, byte 6, bit 3 1079 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1080 } 1081 1082 static int hci_classic_supported(void){ 1083 #ifdef ENABLE_CLASSIC 1084 // No. 37, byte 4, bit 5, = No BR/EDR Support 1085 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1086 #else 1087 return 0; 1088 #endif 1089 } 1090 1091 static int hci_le_supported(void){ 1092 #ifdef ENABLE_BLE 1093 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1094 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1095 #else 1096 return 0; 1097 #endif 1098 } 1099 1100 #ifdef ENABLE_BLE 1101 1102 /** 1103 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1104 */ 1105 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1106 *addr_type = hci_stack->le_own_addr_type; 1107 if (hci_stack->le_own_addr_type){ 1108 (void)memcpy(addr, hci_stack->le_random_address, 6); 1109 } else { 1110 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1111 } 1112 } 1113 1114 #ifdef ENABLE_LE_CENTRAL 1115 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1116 1117 int offset = 3; 1118 int num_reports = packet[offset]; 1119 offset += 1; 1120 1121 int i; 1122 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1123 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1124 for (i=0; (i<num_reports) && (offset < size);i++){ 1125 // sanity checks on data_length: 1126 uint8_t data_length = packet[offset + 8]; 1127 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1128 if ((offset + 9u + data_length + 1u) > size) return; 1129 // setup event 1130 uint8_t event_size = 10u + data_length; 1131 int pos = 0; 1132 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1133 event[pos++] = event_size; 1134 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1135 offset += 8; 1136 pos += 8; 1137 event[pos++] = packet[offset + 1 + data_length]; // rssi 1138 event[pos++] = data_length; 1139 offset++; 1140 (void)memcpy(&event[pos], &packet[offset], data_length); 1141 pos += data_length; 1142 offset += data_length + 1u; // rssi 1143 hci_emit_event(event, pos, 1); 1144 } 1145 } 1146 #endif 1147 #endif 1148 1149 #ifdef ENABLE_BLE 1150 #ifdef ENABLE_LE_PERIPHERAL 1151 static void hci_update_advertisements_enabled_for_current_roles(void){ 1152 if (hci_stack->le_advertisements_enabled){ 1153 // get number of active le slave connections 1154 int num_slave_connections = 0; 1155 btstack_linked_list_iterator_t it; 1156 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1157 while (btstack_linked_list_iterator_has_next(&it)){ 1158 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1159 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1160 if (con->state != OPEN) continue; 1161 if (con->role != HCI_ROLE_SLAVE) continue; 1162 if (!hci_is_le_connection(con)) continue; 1163 num_slave_connections++; 1164 } 1165 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1166 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1167 } else { 1168 hci_stack->le_advertisements_enabled_for_current_roles = false; 1169 } 1170 } 1171 #endif 1172 #endif 1173 1174 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1175 1176 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1177 if (!hci_stack->config) return 0; 1178 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1179 // Limit baud rate for Broadcom chipsets to 3 mbps 1180 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1181 baud_rate = 3000000; 1182 } 1183 return baud_rate; 1184 } 1185 1186 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1187 UNUSED(ds); 1188 1189 switch (hci_stack->substate){ 1190 case HCI_INIT_W4_SEND_RESET: 1191 log_info("Resend HCI Reset"); 1192 hci_stack->substate = HCI_INIT_SEND_RESET; 1193 hci_stack->num_cmd_packets = 1; 1194 hci_run(); 1195 break; 1196 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1197 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1198 if (hci_stack->hci_transport->reset_link){ 1199 hci_stack->hci_transport->reset_link(); 1200 } 1201 1202 /* fall through */ 1203 1204 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1205 log_info("Resend HCI Reset - CSR Warm Boot"); 1206 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1207 hci_stack->num_cmd_packets = 1; 1208 hci_run(); 1209 break; 1210 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1211 if (hci_stack->hci_transport->set_baudrate){ 1212 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1213 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1214 hci_stack->hci_transport->set_baudrate(baud_rate); 1215 } 1216 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1217 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1218 if (hci_stack->hci_transport->reset_link){ 1219 log_info("Link Reset"); 1220 hci_stack->hci_transport->reset_link(); 1221 } 1222 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1223 hci_run(); 1224 } 1225 break; 1226 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1227 // otherwise continue 1228 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1229 hci_send_cmd(&hci_read_local_supported_commands); 1230 break; 1231 default: 1232 break; 1233 } 1234 } 1235 #endif 1236 1237 static void hci_initializing_next_state(void){ 1238 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1239 } 1240 1241 // assumption: hci_can_send_command_packet_now() == true 1242 static void hci_initializing_run(void){ 1243 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1244 switch (hci_stack->substate){ 1245 case HCI_INIT_SEND_RESET: 1246 hci_state_reset(); 1247 1248 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1249 // prepare reset if command complete not received in 100ms 1250 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1251 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1252 btstack_run_loop_add_timer(&hci_stack->timeout); 1253 #endif 1254 // send command 1255 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1256 hci_send_cmd(&hci_reset); 1257 break; 1258 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1259 hci_send_cmd(&hci_read_local_version_information); 1260 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1261 break; 1262 case HCI_INIT_SEND_READ_LOCAL_NAME: 1263 hci_send_cmd(&hci_read_local_name); 1264 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1265 break; 1266 1267 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1268 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1269 hci_state_reset(); 1270 // prepare reset if command complete not received in 100ms 1271 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1272 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1273 btstack_run_loop_add_timer(&hci_stack->timeout); 1274 // send command 1275 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1276 hci_send_cmd(&hci_reset); 1277 break; 1278 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1279 hci_state_reset(); 1280 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1281 hci_send_cmd(&hci_reset); 1282 break; 1283 case HCI_INIT_SEND_BAUD_CHANGE: { 1284 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1285 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1286 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1287 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1288 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1289 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1290 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1291 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1292 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1293 btstack_run_loop_add_timer(&hci_stack->timeout); 1294 } 1295 break; 1296 } 1297 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1298 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1299 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1300 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1301 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1302 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1303 break; 1304 } 1305 case HCI_INIT_CUSTOM_INIT: 1306 // Custom initialization 1307 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1308 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1309 bool send_cmd = false; 1310 switch (hci_stack->chipset_result){ 1311 case BTSTACK_CHIPSET_VALID_COMMAND: 1312 send_cmd = true; 1313 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1314 break; 1315 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1316 send_cmd = true; 1317 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1318 log_info("CSR Warm Boot"); 1319 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1320 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1321 btstack_run_loop_add_timer(&hci_stack->timeout); 1322 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1323 && hci_stack->config 1324 && hci_stack->chipset 1325 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1326 && hci_stack->hci_transport->set_baudrate 1327 && hci_transport_uart_get_main_baud_rate()){ 1328 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1329 } else { 1330 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1331 } 1332 break; 1333 default: 1334 break; 1335 } 1336 1337 if (send_cmd){ 1338 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1339 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1340 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1341 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1342 break; 1343 } 1344 log_info("Init script done"); 1345 1346 // Init script download on Broadcom chipsets causes: 1347 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1348 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1349 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1350 1351 // - baud rate to reset, restore UART baud rate if needed 1352 int need_baud_change = hci_stack->config 1353 && hci_stack->chipset 1354 && hci_stack->chipset->set_baudrate_command 1355 && hci_stack->hci_transport->set_baudrate 1356 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1357 if (need_baud_change) { 1358 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1359 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1360 hci_stack->hci_transport->set_baudrate(baud_rate); 1361 } 1362 1363 uint16_t bcm_delay_ms = 300; 1364 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1365 // -> Work around: wait here. 1366 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1367 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1368 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1369 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1370 btstack_run_loop_add_timer(&hci_stack->timeout); 1371 break; 1372 } 1373 } 1374 // otherwise continue 1375 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1376 hci_send_cmd(&hci_read_local_supported_commands); 1377 break; 1378 case HCI_INIT_SET_BD_ADDR: 1379 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1380 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1381 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1382 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1383 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1384 break; 1385 #endif 1386 1387 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1388 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1389 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1390 hci_send_cmd(&hci_read_local_supported_commands); 1391 break; 1392 case HCI_INIT_READ_BD_ADDR: 1393 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1394 hci_send_cmd(&hci_read_bd_addr); 1395 break; 1396 case HCI_INIT_READ_BUFFER_SIZE: 1397 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1398 hci_send_cmd(&hci_read_buffer_size); 1399 break; 1400 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1401 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1402 hci_send_cmd(&hci_read_local_supported_features); 1403 break; 1404 1405 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1406 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1407 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1408 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1409 break; 1410 case HCI_INIT_HOST_BUFFER_SIZE: 1411 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1412 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1413 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1414 break; 1415 #endif 1416 1417 case HCI_INIT_SET_EVENT_MASK: 1418 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1419 if (hci_le_supported()){ 1420 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1421 } else { 1422 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1423 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1424 } 1425 break; 1426 1427 #ifdef ENABLE_CLASSIC 1428 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1429 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1430 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1431 break; 1432 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1433 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1434 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1435 break; 1436 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1437 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1438 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1439 break; 1440 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1441 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1442 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1443 break; 1444 case HCI_INIT_WRITE_LOCAL_NAME: { 1445 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1446 hci_reserve_packet_buffer(); 1447 uint8_t * packet = hci_stack->hci_packet_buffer; 1448 // construct HCI Command and send 1449 uint16_t opcode = hci_write_local_name.opcode; 1450 hci_stack->last_cmd_opcode = opcode; 1451 packet[0] = opcode & 0xff; 1452 packet[1] = opcode >> 8; 1453 packet[2] = DEVICE_NAME_LEN; 1454 memset(&packet[3], 0, DEVICE_NAME_LEN); 1455 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1456 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1457 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1458 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1459 // expand '00:00:00:00:00:00' in name with bd_addr 1460 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1461 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1462 break; 1463 } 1464 case HCI_INIT_WRITE_EIR_DATA: { 1465 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1466 hci_reserve_packet_buffer(); 1467 uint8_t * packet = hci_stack->hci_packet_buffer; 1468 // construct HCI Command in-place and send 1469 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1470 hci_stack->last_cmd_opcode = opcode; 1471 uint16_t offset = 0; 1472 packet[offset++] = opcode & 0xff; 1473 packet[offset++] = opcode >> 8; 1474 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1475 packet[offset++] = 0; // FEC not required 1476 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1477 if (hci_stack->eir_data){ 1478 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1479 ad_context_t context; 1480 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1481 uint8_t data_type = ad_iterator_get_data_type(&context); 1482 uint8_t size = ad_iterator_get_data_len(&context); 1483 const uint8_t *data = ad_iterator_get_data(&context); 1484 // copy item 1485 packet[offset++] = size + 1; 1486 packet[offset++] = data_type; 1487 memcpy(&packet[offset], data, size); 1488 // update name item 1489 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1490 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1491 } 1492 offset += size; 1493 } 1494 } else { 1495 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1496 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1497 packet[offset++] = bytes_to_copy + 1; 1498 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1499 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1500 // expand '00:00:00:00:00:00' in name with bd_addr 1501 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1502 } 1503 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1504 break; 1505 } 1506 case HCI_INIT_WRITE_INQUIRY_MODE: 1507 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1508 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1509 break; 1510 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1511 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1512 hci_stack->secure_connections_active = true; 1513 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1514 break; 1515 case HCI_INIT_WRITE_SCAN_ENABLE: 1516 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1517 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1518 break; 1519 // only sent if ENABLE_SCO_OVER_HCI is defined 1520 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1521 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1522 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1523 break; 1524 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1525 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1526 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1527 break; 1528 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1529 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1530 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1531 #ifdef ENABLE_SCO_OVER_HCI 1532 log_info("BCM: Route SCO data via HCI transport"); 1533 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1534 #endif 1535 #ifdef ENABLE_SCO_OVER_PCM 1536 log_info("BCM: Route SCO data via PCM interface"); 1537 #ifdef ENABLE_BCM_PCM_WBS 1538 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1539 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1540 #else 1541 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1542 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1543 #endif 1544 #endif 1545 break; 1546 #ifdef ENABLE_SCO_OVER_PCM 1547 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1548 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1549 log_info("BCM: Config PCM interface for I2S"); 1550 #ifdef ENABLE_BCM_PCM_WBS 1551 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1552 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1553 #else 1554 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1555 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1556 #endif 1557 break; 1558 #endif 1559 #endif 1560 1561 #ifdef ENABLE_BLE 1562 // LE INIT 1563 case HCI_INIT_LE_READ_BUFFER_SIZE: 1564 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1565 hci_send_cmd(&hci_le_read_buffer_size); 1566 break; 1567 case HCI_INIT_LE_SET_EVENT_MASK: 1568 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1569 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1570 break; 1571 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1572 // LE Supported Host = 1, Simultaneous Host = 0 1573 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1574 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1575 break; 1576 #endif 1577 1578 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1579 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1580 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1581 hci_send_cmd(&hci_le_read_maximum_data_length); 1582 break; 1583 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1584 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1585 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1586 break; 1587 #endif 1588 1589 #ifdef ENABLE_LE_CENTRAL 1590 case HCI_INIT_READ_WHITE_LIST_SIZE: 1591 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1592 hci_send_cmd(&hci_le_read_white_list_size); 1593 break; 1594 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1595 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1596 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 1597 break; 1598 #endif 1599 default: 1600 return; 1601 } 1602 } 1603 1604 static void hci_init_done(void){ 1605 // done. tell the app 1606 log_info("hci_init_done -> HCI_STATE_WORKING"); 1607 hci_stack->state = HCI_STATE_WORKING; 1608 hci_emit_state(); 1609 hci_run(); 1610 } 1611 1612 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1613 bool command_completed = false; 1614 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1615 uint16_t opcode = little_endian_read_16(packet,3); 1616 if (opcode == hci_stack->last_cmd_opcode){ 1617 command_completed = true; 1618 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1619 } else { 1620 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1621 } 1622 } 1623 1624 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1625 uint8_t status = packet[2]; 1626 uint16_t opcode = little_endian_read_16(packet,4); 1627 if (opcode == hci_stack->last_cmd_opcode){ 1628 if (status){ 1629 command_completed = true; 1630 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1631 } else { 1632 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1633 } 1634 } else { 1635 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1636 } 1637 } 1638 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1639 // Vendor == CSR 1640 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1641 // TODO: track actual command 1642 command_completed = true; 1643 } 1644 1645 // Vendor == Toshiba 1646 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1647 // TODO: track actual command 1648 command_completed = true; 1649 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1650 hci_stack->num_cmd_packets = 1; 1651 } 1652 #endif 1653 1654 return command_completed; 1655 } 1656 1657 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1658 1659 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1660 1661 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1662 1663 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1664 1665 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1666 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1667 // 1668 // HCI Reset 1669 // Timeout 100 ms 1670 // HCI Reset 1671 // Command Complete Reset 1672 // HCI Read Local Version Information 1673 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1674 // hang... 1675 // 1676 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1677 if (!command_completed 1678 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1679 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1680 1681 uint16_t opcode = little_endian_read_16(packet,3); 1682 if (opcode == hci_reset.opcode){ 1683 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1684 return; 1685 } 1686 } 1687 1688 // CSR & H5 1689 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1690 if (!command_completed 1691 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1692 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1693 1694 uint16_t opcode = little_endian_read_16(packet,3); 1695 if (opcode == hci_reset.opcode){ 1696 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1697 return; 1698 } 1699 } 1700 1701 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1702 // fix: Correct substate and behave as command below 1703 if (command_completed){ 1704 switch (hci_stack->substate){ 1705 case HCI_INIT_SEND_RESET: 1706 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1707 break; 1708 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1709 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1710 break; 1711 default: 1712 break; 1713 } 1714 } 1715 1716 #endif 1717 1718 if (!command_completed) return; 1719 1720 bool need_baud_change = false; 1721 bool need_addr_change = false; 1722 1723 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1724 need_baud_change = hci_stack->config 1725 && hci_stack->chipset 1726 && hci_stack->chipset->set_baudrate_command 1727 && hci_stack->hci_transport->set_baudrate 1728 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1729 1730 need_addr_change = hci_stack->custom_bd_addr_set 1731 && hci_stack->chipset 1732 && hci_stack->chipset->set_bd_addr_command; 1733 #endif 1734 1735 switch(hci_stack->substate){ 1736 1737 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1738 case HCI_INIT_SEND_RESET: 1739 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1740 // fix: just correct substate and behave as command below 1741 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1742 btstack_run_loop_remove_timer(&hci_stack->timeout); 1743 break; 1744 case HCI_INIT_W4_SEND_RESET: 1745 btstack_run_loop_remove_timer(&hci_stack->timeout); 1746 break; 1747 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1748 log_info("Received local name, need baud change %d", (int) need_baud_change); 1749 if (need_baud_change){ 1750 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1751 return; 1752 } 1753 // skip baud change 1754 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1755 return; 1756 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1757 // for STLC2500D, baud rate change already happened. 1758 // for others, baud rate gets changed now 1759 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1760 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1761 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1762 hci_stack->hci_transport->set_baudrate(baud_rate); 1763 } 1764 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1765 return; 1766 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1767 btstack_run_loop_remove_timer(&hci_stack->timeout); 1768 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1769 return; 1770 case HCI_INIT_W4_CUSTOM_INIT: 1771 // repeat custom init 1772 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1773 return; 1774 #else 1775 case HCI_INIT_W4_SEND_RESET: 1776 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1777 return ; 1778 #endif 1779 1780 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1781 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1782 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1783 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1784 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1785 return; 1786 } 1787 if (need_addr_change){ 1788 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1789 return; 1790 } 1791 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1792 return; 1793 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1794 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1795 if (need_baud_change){ 1796 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1797 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1798 hci_stack->hci_transport->set_baudrate(baud_rate); 1799 } 1800 if (need_addr_change){ 1801 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1802 return; 1803 } 1804 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1805 return; 1806 case HCI_INIT_W4_SET_BD_ADDR: 1807 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1808 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1809 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1810 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1811 return; 1812 } 1813 // skipping st warm boot 1814 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1815 return; 1816 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1817 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1818 return; 1819 #endif 1820 case HCI_INIT_W4_READ_BD_ADDR: 1821 // only read buffer size if supported 1822 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1823 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1824 return; 1825 } 1826 // skipping read buffer size 1827 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1828 return; 1829 case HCI_INIT_W4_SET_EVENT_MASK: 1830 // skip Classic init commands for LE only chipsets 1831 if (!hci_classic_supported()){ 1832 #ifdef ENABLE_BLE 1833 if (hci_le_supported()){ 1834 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1835 return; 1836 } 1837 #endif 1838 log_error("Neither BR/EDR nor LE supported"); 1839 hci_init_done(); 1840 return; 1841 } 1842 if (!gap_ssp_supported()){ 1843 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1844 return; 1845 } 1846 break; 1847 #ifdef ENABLE_BLE 1848 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1849 // skip write le host if not supported (e.g. on LE only EM9301) 1850 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1851 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1852 return; 1853 1854 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1855 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1856 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1857 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1858 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1859 return; 1860 } 1861 // explicit fall through to reduce repetitions 1862 1863 #ifdef ENABLE_LE_CENTRAL 1864 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1865 #else 1866 hci_init_done(); 1867 #endif 1868 return; 1869 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1870 1871 #endif /* ENABLE_BLE */ 1872 1873 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1874 // skip write secure connections host support if not supported or disabled 1875 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1876 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1877 return; 1878 } 1879 break; 1880 1881 #ifdef ENABLE_SCO_OVER_HCI 1882 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1883 // skip write synchronous flow control if not supported 1884 if (hci_stack->local_supported_commands[0] & 0x04) break; 1885 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1886 1887 /* fall through */ 1888 1889 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1890 // skip write default erroneous data reporting if not supported 1891 if (hci_stack->local_supported_commands[0] & 0x08) break; 1892 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1893 1894 /* fall through */ 1895 1896 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1897 // skip bcm set sco pcm config on non-Broadcom chipsets 1898 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1899 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1900 1901 /* fall through */ 1902 1903 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1904 if (!hci_le_supported()){ 1905 // SKIP LE init for Classic only configuration 1906 hci_init_done(); 1907 return; 1908 } 1909 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1910 break; 1911 1912 #else /* !ENABLE_SCO_OVER_HCI */ 1913 1914 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1915 #ifdef ENABLE_SCO_OVER_PCM 1916 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1917 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1918 return; 1919 } 1920 #endif 1921 /* fall through */ 1922 1923 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1924 #ifdef ENABLE_BLE 1925 if (hci_le_supported()){ 1926 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1927 return; 1928 } 1929 #endif 1930 // SKIP LE init for Classic only configuration 1931 hci_init_done(); 1932 return; 1933 #endif /* ENABLE_SCO_OVER_HCI */ 1934 1935 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1936 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1937 // Response to command before init done state -> init done 1938 case (HCI_INIT_DONE-1): 1939 hci_init_done(); 1940 return; 1941 #endif 1942 1943 default: 1944 break; 1945 } 1946 hci_initializing_next_state(); 1947 } 1948 1949 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1950 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1951 bd_addr_t bd_address; 1952 (void)memcpy(&bd_address, conn->address, 6); 1953 1954 #ifdef ENABLE_CLASSIC 1955 // cache needed data 1956 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1957 #endif 1958 1959 // connection failed, remove entry 1960 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1961 btstack_memory_hci_connection_free( conn ); 1962 1963 #ifdef ENABLE_CLASSIC 1964 // notify client if dedicated bonding 1965 if (notify_dedicated_bonding_failed){ 1966 log_info("hci notify_dedicated_bonding_failed"); 1967 hci_emit_dedicated_bonding_result(bd_address, status); 1968 } 1969 1970 // if authentication error, also delete link key 1971 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1972 gap_drop_link_key_for_bd_addr(bd_address); 1973 } 1974 #else 1975 UNUSED(status); 1976 #endif 1977 } 1978 1979 #ifdef ENABLE_CLASSIC 1980 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1981 // SSP Controller 1982 if (features[6] & (1 << 3)){ 1983 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1984 } 1985 // eSCO 1986 if (features[3] & (1<<7)){ 1987 conn->remote_supported_features[0] |= 1; 1988 } 1989 // Extended features 1990 if (features[7] & (1<<7)){ 1991 conn->remote_supported_features[0] |= 2; 1992 } 1993 } 1994 1995 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1996 // SSP Host 1997 if (features[0] & (1 << 0)){ 1998 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1999 } 2000 // SC Host 2001 if (features[0] & (1 << 3)){ 2002 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2003 } 2004 } 2005 2006 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2007 // SC Controller 2008 if (features[1] & (1 << 0)){ 2009 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2010 } 2011 } 2012 2013 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2014 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2015 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2016 if (conn->bonding_flags & BONDING_DEDICATED){ 2017 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2018 } 2019 } 2020 #endif 2021 2022 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2023 // handle BT initialization 2024 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2025 hci_initializing_event_handler(packet, size); 2026 } 2027 2028 // help with BT sleep 2029 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2030 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2031 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2032 hci_initializing_next_state(); 2033 } 2034 } 2035 2036 #ifdef ENABLE_CLASSIC 2037 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2038 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2039 conn->encryption_key_size = encryption_key_size; 2040 2041 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 2042 conn->requested_security_level = LEVEL_0; 2043 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2044 return; 2045 } 2046 2047 // Request Authentication if not already done 2048 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2049 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2050 } 2051 #endif 2052 2053 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2054 UNUSED(size); 2055 2056 uint16_t manufacturer; 2057 #ifdef ENABLE_CLASSIC 2058 hci_con_handle_t handle; 2059 hci_connection_t * conn; 2060 uint8_t status; 2061 #endif 2062 // get num cmd packets - limit to 1 to reduce complexity 2063 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2064 2065 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2066 switch (opcode){ 2067 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2068 if (packet[5]) break; 2069 // terminate, name 248 chars 2070 packet[6+248] = 0; 2071 log_info("local name: %s", &packet[6]); 2072 break; 2073 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2074 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2075 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2076 uint16_t acl_len = little_endian_read_16(packet, 6); 2077 uint16_t sco_len = packet[8]; 2078 2079 // determine usable ACL/SCO payload size 2080 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2081 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2082 2083 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2084 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2085 2086 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2087 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2088 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2089 } 2090 break; 2091 case HCI_OPCODE_HCI_READ_RSSI: 2092 if (packet[5] == ERROR_CODE_SUCCESS){ 2093 uint8_t event[5]; 2094 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2095 event[1] = 3; 2096 (void)memcpy(&event[2], &packet[6], 3); 2097 hci_emit_event(event, sizeof(event), 1); 2098 } 2099 break; 2100 #ifdef ENABLE_BLE 2101 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2102 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2103 hci_stack->le_acl_packets_total_num = packet[8]; 2104 // determine usable ACL payload size 2105 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2106 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2107 } 2108 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2109 break; 2110 #endif 2111 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2112 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2113 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2114 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2115 log_info("hci_le_read_maximum_data_length: tx octets %u, tx time %u us", hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 2116 break; 2117 #endif 2118 #ifdef ENABLE_LE_CENTRAL 2119 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2120 hci_stack->le_whitelist_capacity = packet[6]; 2121 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2122 break; 2123 #endif 2124 case HCI_OPCODE_HCI_READ_BD_ADDR: 2125 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2126 log_info("Local Address, Status: 0x%02x: Addr: %s", packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 2127 #ifdef ENABLE_CLASSIC 2128 if (hci_stack->link_key_db){ 2129 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2130 } 2131 #endif 2132 break; 2133 #ifdef ENABLE_CLASSIC 2134 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2135 hci_emit_discoverable_enabled(hci_stack->discoverable); 2136 break; 2137 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2138 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2139 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2140 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2141 hci_emit_event(event, sizeof(event), 1); 2142 } 2143 break; 2144 #endif 2145 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2146 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2147 2148 #ifdef ENABLE_CLASSIC 2149 // determine usable ACL packet types based on host buffer size and supported features 2150 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2151 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2152 #endif 2153 // Classic/LE 2154 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2155 break; 2156 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2157 manufacturer = little_endian_read_16(packet, 10); 2158 // map Cypress to Broadcom 2159 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2160 log_info("Treat Cypress as Broadcom"); 2161 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2162 little_endian_store_16(packet, 10, manufacturer); 2163 } 2164 hci_stack->manufacturer = manufacturer; 2165 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2166 break; 2167 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2168 hci_stack->local_supported_commands[0] = 2169 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2170 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2171 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2172 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2173 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2174 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2175 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2176 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2177 hci_stack->local_supported_commands[1] = 2178 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2179 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2180 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2181 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2182 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2183 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2184 break; 2185 #ifdef ENABLE_CLASSIC 2186 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2187 if (packet[5]) return; 2188 hci_stack->synchronous_flow_control_enabled = 1; 2189 break; 2190 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2191 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2192 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2193 conn = hci_connection_for_handle(handle); 2194 if (conn != NULL) { 2195 uint8_t key_size = 0; 2196 if (status == 0){ 2197 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2198 log_info("Handle %04x key Size: %u", handle, key_size); 2199 } else { 2200 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2201 } 2202 hci_handle_read_encryption_key_size_complete(conn, key_size); 2203 } 2204 break; 2205 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2206 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2207 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2208 uint8_t event[67]; 2209 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2210 event[1] = 65; 2211 (void)memset(&event[2], 0, 65); 2212 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2213 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2214 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2215 event[2] = 3; 2216 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2217 } else { 2218 event[2] = 1; 2219 } 2220 } 2221 hci_emit_event(event, sizeof(event), 0); 2222 break; 2223 } 2224 #endif 2225 #endif 2226 default: 2227 break; 2228 } 2229 } 2230 2231 #ifdef ENABLE_BLE 2232 static void event_handle_le_connection_complete(const uint8_t * packet){ 2233 bd_addr_t addr; 2234 bd_addr_type_t addr_type; 2235 hci_connection_t * conn; 2236 2237 // Connection management 2238 reverse_bd_addr(&packet[8], addr); 2239 addr_type = (bd_addr_type_t)packet[7]; 2240 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2241 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2242 2243 #ifdef ENABLE_LE_CENTRAL 2244 // handle error: error is reported only to the initiator -> outgoing connection 2245 if (packet[3]){ 2246 2247 // handle cancelled outgoing connection 2248 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2249 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2250 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2251 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2252 // reset state 2253 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2254 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2255 // get outgoing connection conn struct for direct connect 2256 conn = gap_get_outgoing_connection(); 2257 } 2258 2259 // outgoing le connection establishment is done 2260 if (conn){ 2261 // remove entry 2262 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2263 btstack_memory_hci_connection_free( conn ); 2264 } 2265 return; 2266 } 2267 #endif 2268 2269 // on success, both hosts receive connection complete event 2270 if (packet[6] == HCI_ROLE_MASTER){ 2271 #ifdef ENABLE_LE_CENTRAL 2272 // if we're master on an le connection, it was an outgoing connection and we're done with it 2273 // note: no hci_connection_t object exists yet for connect with whitelist 2274 if (hci_is_le_connection_type(addr_type)){ 2275 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2276 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2277 } 2278 #endif 2279 } else { 2280 #ifdef ENABLE_LE_PERIPHERAL 2281 // if we're slave, it was an incoming connection, advertisements have stopped 2282 hci_stack->le_advertisements_active = false; 2283 #endif 2284 } 2285 2286 // LE connections are auto-accepted, so just create a connection if there isn't one already 2287 if (!conn){ 2288 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2289 } 2290 2291 // no memory, sorry. 2292 if (!conn){ 2293 return; 2294 } 2295 2296 conn->state = OPEN; 2297 conn->role = packet[6]; 2298 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2299 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2300 2301 #ifdef ENABLE_LE_PERIPHERAL 2302 if (packet[6] == HCI_ROLE_SLAVE){ 2303 hci_update_advertisements_enabled_for_current_roles(); 2304 } 2305 #endif 2306 2307 // init unenhanced att bearer mtu 2308 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2309 conn->att_connection.mtu_exchanged = false; 2310 2311 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2312 2313 // restart timer 2314 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2315 // btstack_run_loop_add_timer(&conn->timeout); 2316 2317 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2318 2319 hci_emit_nr_connections_changed(); 2320 } 2321 #endif 2322 2323 static void event_handler(uint8_t *packet, uint16_t size){ 2324 2325 uint16_t event_length = packet[1]; 2326 2327 // assert packet is complete 2328 if (size != (event_length + 2u)){ 2329 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2330 return; 2331 } 2332 2333 bd_addr_type_t addr_type; 2334 hci_con_handle_t handle; 2335 hci_connection_t * conn; 2336 int i; 2337 int create_connection_cmd; 2338 2339 #ifdef ENABLE_CLASSIC 2340 hci_link_type_t link_type; 2341 bd_addr_t addr; 2342 #endif 2343 2344 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2345 2346 switch (hci_event_packet_get_type(packet)) { 2347 2348 case HCI_EVENT_COMMAND_COMPLETE: 2349 handle_command_complete_event(packet, size); 2350 break; 2351 2352 case HCI_EVENT_COMMAND_STATUS: 2353 // get num cmd packets - limit to 1 to reduce complexity 2354 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2355 2356 // check command status to detected failed outgoing connections 2357 create_connection_cmd = 0; 2358 #ifdef ENABLE_CLASSIC 2359 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2360 create_connection_cmd = 1; 2361 } 2362 #endif 2363 #ifdef ENABLE_LE_CENTRAL 2364 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2365 create_connection_cmd = 1; 2366 } 2367 #endif 2368 if (create_connection_cmd) { 2369 uint8_t status = hci_event_command_status_get_status(packet); 2370 addr_type = hci_stack->outgoing_addr_type; 2371 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2372 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); 2373 2374 // reset outgoing address info 2375 memset(hci_stack->outgoing_addr, 0, 6); 2376 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2377 2378 // on error 2379 if (status != ERROR_CODE_SUCCESS){ 2380 #ifdef ENABLE_LE_CENTRAL 2381 if (hci_is_le_connection_type(addr_type)){ 2382 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2383 } 2384 #endif 2385 // error => outgoing connection failed 2386 if (conn != NULL){ 2387 hci_handle_connection_failed(conn, status); 2388 } 2389 } 2390 } 2391 2392 #ifdef ENABLE_CLASSIC 2393 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2394 uint8_t status = hci_event_command_status_get_status(packet); 2395 log_info("command status (inquiry), status %x", status); 2396 if (status == ERROR_CODE_SUCCESS) { 2397 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2398 } else { 2399 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2400 } 2401 } 2402 #endif 2403 break; 2404 2405 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2406 if (size < 3) return; 2407 uint16_t num_handles = packet[2]; 2408 if (size != (3u + num_handles * 4u)) return; 2409 uint16_t offset = 3; 2410 for (i=0; i<num_handles;i++){ 2411 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2412 offset += 2u; 2413 uint16_t num_packets = little_endian_read_16(packet, offset); 2414 offset += 2u; 2415 2416 conn = hci_connection_for_handle(handle); 2417 if (!conn){ 2418 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2419 continue; 2420 } 2421 2422 if (conn->num_packets_sent >= num_packets){ 2423 conn->num_packets_sent -= num_packets; 2424 } else { 2425 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2426 conn->num_packets_sent = 0; 2427 } 2428 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2429 2430 #ifdef ENABLE_CLASSIC 2431 // For SCO, we do the can_send_now_check here 2432 hci_notify_if_sco_can_send_now(); 2433 #endif 2434 } 2435 break; 2436 } 2437 2438 #ifdef ENABLE_CLASSIC 2439 case HCI_EVENT_INQUIRY_COMPLETE: 2440 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2441 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2442 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2443 hci_emit_event(event, sizeof(event), 1); 2444 } 2445 break; 2446 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2447 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2448 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2449 } 2450 break; 2451 case HCI_EVENT_CONNECTION_REQUEST: 2452 reverse_bd_addr(&packet[2], addr); 2453 link_type = (hci_link_type_t) packet[11]; 2454 if (hci_stack->gap_classic_accept_callback != NULL){ 2455 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2456 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2457 bd_addr_copy(hci_stack->decline_addr, addr); 2458 break; 2459 } 2460 } 2461 2462 // TODO: eval COD 8-10 2463 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2464 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2465 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2466 if (!conn) { 2467 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2468 } 2469 if (!conn) { 2470 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2471 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2472 bd_addr_copy(hci_stack->decline_addr, addr); 2473 break; 2474 } 2475 conn->role = HCI_ROLE_SLAVE; 2476 conn->state = RECEIVED_CONNECTION_REQUEST; 2477 // store info about eSCO 2478 if (link_type == HCI_LINK_TYPE_ESCO){ 2479 conn->remote_supported_features[0] |= 1; 2480 } 2481 hci_run(); 2482 break; 2483 2484 case HCI_EVENT_CONNECTION_COMPLETE: 2485 // Connection management 2486 reverse_bd_addr(&packet[5], addr); 2487 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2488 addr_type = BD_ADDR_TYPE_ACL; 2489 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2490 if (conn) { 2491 if (!packet[2]){ 2492 conn->state = OPEN; 2493 conn->con_handle = little_endian_read_16(packet, 3); 2494 2495 // queue get remote feature 2496 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2497 2498 // queue set supervision timeout if we're master 2499 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2500 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2501 } 2502 2503 // restart timer 2504 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2505 btstack_run_loop_add_timer(&conn->timeout); 2506 2507 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2508 2509 hci_emit_nr_connections_changed(); 2510 } else { 2511 // connection failed 2512 hci_handle_connection_failed(conn, packet[2]); 2513 } 2514 } 2515 break; 2516 2517 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2518 reverse_bd_addr(&packet[5], addr); 2519 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2520 if (packet[2]){ 2521 // connection failed 2522 break; 2523 } 2524 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2525 if (!conn) { 2526 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2527 } 2528 if (!conn) { 2529 break; 2530 } 2531 conn->state = OPEN; 2532 conn->con_handle = little_endian_read_16(packet, 3); 2533 2534 #ifdef ENABLE_SCO_OVER_HCI 2535 // update SCO 2536 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2537 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2538 } 2539 // trigger can send now 2540 if (hci_have_usb_transport()){ 2541 hci_stack->sco_can_send_now = 1; 2542 } 2543 #endif 2544 #ifdef HAVE_SCO_TRANSPORT 2545 // configure sco transport 2546 if (hci_stack->sco_transport != NULL){ 2547 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2548 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2549 } 2550 #endif 2551 break; 2552 2553 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2554 handle = little_endian_read_16(packet, 3); 2555 conn = hci_connection_for_handle(handle); 2556 if (!conn) break; 2557 if (!packet[2]){ 2558 const uint8_t * features = &packet[5]; 2559 hci_handle_remote_features_page_0(conn, features); 2560 2561 // read extended features if possible 2562 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2563 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2564 break; 2565 } 2566 } 2567 hci_handle_remote_features_received(conn); 2568 break; 2569 2570 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2571 handle = little_endian_read_16(packet, 3); 2572 conn = hci_connection_for_handle(handle); 2573 if (!conn) break; 2574 // status = ok, page = 1 2575 if (!packet[2]) { 2576 uint8_t page_number = packet[5]; 2577 uint8_t maximum_page_number = packet[6]; 2578 const uint8_t * features = &packet[7]; 2579 bool done = false; 2580 switch (page_number){ 2581 case 1: 2582 hci_handle_remote_features_page_1(conn, features); 2583 if (maximum_page_number >= 2){ 2584 // get Secure Connections (Controller) from Page 2 if available 2585 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2586 } else { 2587 // otherwise, assume SC (Controller) == SC (Host) 2588 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2589 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2590 } 2591 done = true; 2592 } 2593 break; 2594 case 2: 2595 hci_handle_remote_features_page_2(conn, features); 2596 done = true; 2597 break; 2598 default: 2599 break; 2600 } 2601 if (!done) break; 2602 } 2603 hci_handle_remote_features_received(conn); 2604 break; 2605 2606 case HCI_EVENT_LINK_KEY_REQUEST: 2607 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2608 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2609 // request handled by hci_run() 2610 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2611 break; 2612 2613 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2614 reverse_bd_addr(&packet[2], addr); 2615 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2616 if (!conn) break; 2617 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2618 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2619 // Change Connection Encryption keeps link key type 2620 if (link_key_type != CHANGED_COMBINATION_KEY){ 2621 conn->link_key_type = link_key_type; 2622 } 2623 // only store link key: 2624 // - if bondable enabled 2625 if (hci_stack->bondable == false) break; 2626 // - for SSP, also check if remote side requested bonding as well 2627 if (conn->link_key_type != COMBINATION_KEY){ 2628 uint8_t auth_req_ignoring_mitm = conn->io_cap_response_auth_req & 0xfe; 2629 if (auth_req_ignoring_mitm == SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_NO_BONDING){ 2630 break; 2631 } 2632 } 2633 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2634 // still forward event to allow dismiss of pairing dialog 2635 break; 2636 } 2637 2638 case HCI_EVENT_PIN_CODE_REQUEST: 2639 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2640 // non-bondable mode: pin code negative reply will be sent 2641 if (!hci_stack->bondable){ 2642 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2643 hci_run(); 2644 return; 2645 } 2646 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2647 if (!hci_stack->link_key_db) break; 2648 hci_event_pin_code_request_get_bd_addr(packet, addr); 2649 hci_stack->link_key_db->delete_link_key(addr); 2650 break; 2651 2652 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2653 hci_event_io_capability_response_get_bd_addr(packet, addr); 2654 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2655 if (!conn) break; 2656 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2657 break; 2658 2659 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2660 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2661 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2662 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2663 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2664 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2665 } else { 2666 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2667 } 2668 #endif 2669 break; 2670 2671 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2672 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2673 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2674 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_REMOTE_OOB_DATA_REPLY); 2675 break; 2676 #endif 2677 2678 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2679 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2680 if (!hci_stack->ssp_auto_accept) break; 2681 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2682 break; 2683 2684 case HCI_EVENT_USER_PASSKEY_REQUEST: 2685 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2686 if (!hci_stack->ssp_auto_accept) break; 2687 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2688 break; 2689 2690 case HCI_EVENT_MODE_CHANGE: 2691 handle = hci_event_mode_change_get_handle(packet); 2692 conn = hci_connection_for_handle(handle); 2693 if (!conn) break; 2694 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2695 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2696 break; 2697 #endif 2698 2699 case HCI_EVENT_ENCRYPTION_CHANGE: 2700 handle = hci_event_encryption_change_get_connection_handle(packet); 2701 conn = hci_connection_for_handle(handle); 2702 if (!conn) break; 2703 if (hci_event_encryption_change_get_status(packet) == 0u) { 2704 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2705 if (encryption_enabled){ 2706 if (hci_is_le_connection(conn)){ 2707 // For LE, we accept connection as encrypted 2708 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2709 } 2710 #ifdef ENABLE_CLASSIC 2711 else { 2712 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2713 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2714 bool connected_uses_aes_ccm = encryption_enabled == 2; 2715 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2716 log_info("SC during pairing, but only E0 now -> abort"); 2717 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2718 break; 2719 } 2720 2721 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2722 if (connected_uses_aes_ccm){ 2723 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2724 } 2725 2726 #ifdef ENABLE_TESTING_SUPPORT 2727 // work around for issue with PTS dongle 2728 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2729 #endif 2730 2731 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2732 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2733 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2734 } else { 2735 // if not, pretend everything is perfect 2736 hci_handle_read_encryption_key_size_complete(conn, 16); 2737 } 2738 } 2739 #endif 2740 } else { 2741 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2742 } 2743 } 2744 2745 break; 2746 2747 #ifdef ENABLE_CLASSIC 2748 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2749 handle = hci_event_authentication_complete_get_connection_handle(packet); 2750 conn = hci_connection_for_handle(handle); 2751 if (!conn) break; 2752 2753 // ignore authentication event if we didn't request it 2754 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2755 2756 // dedicated bonding: send result and disconnect 2757 if (conn->bonding_flags & BONDING_DEDICATED){ 2758 conn->bonding_flags &= ~BONDING_DEDICATED; 2759 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2760 conn->bonding_status = packet[2]; 2761 break; 2762 } 2763 2764 // authenticated only if auth status == 0 2765 if (hci_event_authentication_complete_get_status(packet) == 0){ 2766 // authenticated 2767 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2768 2769 // If not already encrypted, start encryption 2770 if ((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 conn->requested_security_level = LEVEL_0; 2778 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2779 break; 2780 #endif 2781 2782 // HCI_EVENT_DISCONNECTION_COMPLETE 2783 // has been split, to first notify stack before shutting connection down 2784 // see end of function, too. 2785 case HCI_EVENT_DISCONNECTION_COMPLETE: 2786 if (packet[2]) break; // status != 0 2787 handle = little_endian_read_16(packet, 3); 2788 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2789 if (hci_stack->acl_fragmentation_total_size > 0u) { 2790 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2791 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2792 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2793 hci_stack->acl_fragmentation_total_size = 0; 2794 hci_stack->acl_fragmentation_pos = 0; 2795 if (release_buffer){ 2796 hci_release_packet_buffer(); 2797 } 2798 } 2799 } 2800 2801 conn = hci_connection_for_handle(handle); 2802 if (!conn) break; 2803 // mark connection for shutdown 2804 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2805 2806 // emit dedicatd bonding event 2807 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2808 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2809 } 2810 2811 #ifdef ENABLE_BLE 2812 #ifdef ENABLE_LE_PERIPHERAL 2813 // re-enable advertisements for le connections if active 2814 if (hci_is_le_connection(conn)){ 2815 hci_update_advertisements_enabled_for_current_roles(); 2816 } 2817 #endif 2818 #endif 2819 break; 2820 2821 case HCI_EVENT_HARDWARE_ERROR: 2822 log_error("Hardware Error: 0x%02x", packet[2]); 2823 if (hci_stack->hardware_error_callback){ 2824 (*hci_stack->hardware_error_callback)(packet[2]); 2825 } else { 2826 // if no special requests, just reboot stack 2827 hci_power_control_off(); 2828 hci_power_control_on(); 2829 } 2830 break; 2831 2832 #ifdef ENABLE_CLASSIC 2833 case HCI_EVENT_ROLE_CHANGE: 2834 if (packet[2]) break; // status != 0 2835 reverse_bd_addr(&packet[3], addr); 2836 addr_type = BD_ADDR_TYPE_ACL; 2837 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2838 if (!conn) break; 2839 conn->role = packet[9]; 2840 break; 2841 #endif 2842 2843 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2844 // release packet buffer only for asynchronous transport and if there are not further fragements 2845 if (hci_transport_synchronous()) { 2846 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2847 return; // instead of break: to avoid re-entering hci_run() 2848 } 2849 hci_stack->acl_fragmentation_tx_active = 0; 2850 if (hci_stack->acl_fragmentation_total_size) break; 2851 hci_release_packet_buffer(); 2852 2853 // L2CAP receives this event via the hci_emit_event below 2854 2855 #ifdef ENABLE_CLASSIC 2856 // For SCO, we do the can_send_now_check here 2857 hci_notify_if_sco_can_send_now(); 2858 #endif 2859 break; 2860 2861 #ifdef ENABLE_CLASSIC 2862 case HCI_EVENT_SCO_CAN_SEND_NOW: 2863 // For SCO, we do the can_send_now_check here 2864 hci_stack->sco_can_send_now = 1; 2865 hci_notify_if_sco_can_send_now(); 2866 return; 2867 2868 // explode inquriy results for easier consumption 2869 case HCI_EVENT_INQUIRY_RESULT: 2870 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2871 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2872 gap_inquiry_explode(packet, size); 2873 break; 2874 #endif 2875 2876 #ifdef ENABLE_BLE 2877 case HCI_EVENT_LE_META: 2878 switch (packet[2]){ 2879 #ifdef ENABLE_LE_CENTRAL 2880 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2881 // log_info("advertising report received"); 2882 if (!hci_stack->le_scanning_enabled) break; 2883 le_handle_advertisement_report(packet, size); 2884 break; 2885 #endif 2886 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2887 event_handle_le_connection_complete(packet); 2888 break; 2889 2890 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2891 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2892 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2893 conn = hci_connection_for_handle(handle); 2894 if (!conn) break; 2895 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2896 break; 2897 2898 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2899 // connection 2900 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2901 conn = hci_connection_for_handle(handle); 2902 if (conn) { 2903 // read arguments 2904 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2905 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2906 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2907 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2908 2909 // validate against current connection parameter range 2910 le_connection_parameter_range_t existing_range; 2911 gap_get_connection_parameter_range(&existing_range); 2912 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2913 if (update_parameter){ 2914 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2915 conn->le_conn_interval_min = le_conn_interval_min; 2916 conn->le_conn_interval_max = le_conn_interval_max; 2917 conn->le_conn_latency = le_conn_latency; 2918 conn->le_supervision_timeout = le_supervision_timeout; 2919 } else { 2920 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 2921 } 2922 } 2923 break; 2924 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2925 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2926 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2927 conn = hci_connection_for_handle(handle); 2928 if (conn) { 2929 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2930 } 2931 break; 2932 #endif 2933 default: 2934 break; 2935 } 2936 break; 2937 #endif 2938 case HCI_EVENT_VENDOR_SPECIFIC: 2939 // Vendor specific commands often create vendor specific event instead of num completed packets 2940 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2941 switch (hci_stack->manufacturer){ 2942 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2943 hci_stack->num_cmd_packets = 1; 2944 break; 2945 default: 2946 break; 2947 } 2948 break; 2949 default: 2950 break; 2951 } 2952 2953 handle_event_for_current_stack_state(packet, size); 2954 2955 // notify upper stack 2956 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2957 2958 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2959 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 2960 handle = little_endian_read_16(packet, 3); 2961 hci_connection_t * aConn = hci_connection_for_handle(handle); 2962 // discard connection if app did not trigger a reconnect in the event handler 2963 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2964 hci_shutdown_connection(aConn); 2965 } 2966 } 2967 2968 // execute main loop 2969 hci_run(); 2970 } 2971 2972 #ifdef ENABLE_CLASSIC 2973 2974 #ifdef ENABLE_SCO_OVER_HCI 2975 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2976 static void sco_schedule_tx(hci_connection_t * conn); 2977 2978 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2979 log_debug("SCO TX Timeout"); 2980 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2981 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2982 if (!conn) return; 2983 2984 // trigger send 2985 conn->sco_tx_ready = 1; 2986 // extra packet if CVSD but SCO buffer is too short 2987 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2988 conn->sco_tx_ready++; 2989 } 2990 hci_notify_if_sco_can_send_now(); 2991 } 2992 2993 2994 #define SCO_TX_AFTER_RX_MS (6) 2995 2996 static void sco_schedule_tx(hci_connection_t * conn){ 2997 2998 uint32_t now = btstack_run_loop_get_time_ms(); 2999 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3000 int time_delta_ms = sco_tx_ms - now; 3001 3002 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3003 3004 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3005 btstack_run_loop_set_timer(timer, time_delta_ms); 3006 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3007 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3008 btstack_run_loop_add_timer(timer); 3009 } 3010 #endif 3011 3012 static void sco_handler(uint8_t * packet, uint16_t size){ 3013 // lookup connection struct 3014 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3015 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3016 if (!conn) return; 3017 3018 #ifdef ENABLE_SCO_OVER_HCI 3019 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3020 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3021 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3022 packet[2] = 0x3c; 3023 memmove(&packet[3], &packet[23], 63); 3024 size = 63; 3025 } 3026 } 3027 3028 if (hci_have_usb_transport()){ 3029 // Nothing to do 3030 } else { 3031 // 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); 3032 if (hci_stack->synchronous_flow_control_enabled == 0){ 3033 uint32_t now = btstack_run_loop_get_time_ms(); 3034 3035 if (!conn->sco_rx_valid){ 3036 // ignore first 10 packets 3037 conn->sco_rx_count++; 3038 // log_debug("sco rx count %u", conn->sco_rx_count); 3039 if (conn->sco_rx_count == 10) { 3040 // use first timestamp as is and pretent it just started 3041 conn->sco_rx_ms = now; 3042 conn->sco_rx_valid = 1; 3043 conn->sco_rx_count = 0; 3044 sco_schedule_tx(conn); 3045 } 3046 } else { 3047 // track expected arrival timme 3048 conn->sco_rx_count++; 3049 conn->sco_rx_ms += 7; 3050 int delta = (int32_t) (now - conn->sco_rx_ms); 3051 if (delta > 0){ 3052 conn->sco_rx_ms++; 3053 } 3054 // log_debug("sco rx %u", conn->sco_rx_ms); 3055 sco_schedule_tx(conn); 3056 } 3057 } 3058 } 3059 #endif 3060 3061 // deliver to app 3062 if (hci_stack->sco_packet_handler) { 3063 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3064 } 3065 3066 #ifdef HAVE_SCO_TRANSPORT 3067 // We can send one packet for each received packet 3068 conn->sco_tx_ready++; 3069 hci_notify_if_sco_can_send_now(); 3070 #endif 3071 3072 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3073 conn->num_packets_completed++; 3074 hci_stack->host_completed_packets = 1; 3075 hci_run(); 3076 #endif 3077 } 3078 #endif 3079 3080 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3081 hci_dump_packet(packet_type, 1, packet, size); 3082 switch (packet_type) { 3083 case HCI_EVENT_PACKET: 3084 event_handler(packet, size); 3085 break; 3086 case HCI_ACL_DATA_PACKET: 3087 acl_handler(packet, size); 3088 break; 3089 #ifdef ENABLE_CLASSIC 3090 case HCI_SCO_DATA_PACKET: 3091 sco_handler(packet, size); 3092 break; 3093 #endif 3094 default: 3095 break; 3096 } 3097 } 3098 3099 /** 3100 * @brief Add event packet handler. 3101 */ 3102 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3103 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3104 } 3105 3106 3107 /** Register HCI packet handlers */ 3108 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3109 hci_stack->acl_packet_handler = handler; 3110 } 3111 3112 #ifdef ENABLE_CLASSIC 3113 /** 3114 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3115 */ 3116 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3117 hci_stack->sco_packet_handler = handler; 3118 } 3119 #endif 3120 3121 static void hci_state_reset(void){ 3122 // no connections yet 3123 hci_stack->connections = NULL; 3124 3125 // keep discoverable/connectable as this has been requested by the client(s) 3126 // hci_stack->discoverable = 0; 3127 // hci_stack->connectable = 0; 3128 // hci_stack->bondable = 1; 3129 // hci_stack->own_addr_type = 0; 3130 3131 // buffer is free 3132 hci_stack->hci_packet_buffer_reserved = 0; 3133 3134 // no pending cmds 3135 hci_stack->decline_reason = 0; 3136 hci_stack->new_scan_enable_value = 0xff; 3137 3138 hci_stack->secure_connections_active = false; 3139 3140 #ifdef ENABLE_CLASSIC 3141 hci_stack->new_page_scan_interval = 0xffff; 3142 hci_stack->new_page_scan_window = 0xffff; 3143 hci_stack->new_page_scan_type = 0xff; 3144 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3145 #endif 3146 3147 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3148 hci_stack->classic_read_local_oob_data = true; 3149 #endif 3150 3151 // LE 3152 #ifdef ENABLE_BLE 3153 memset(hci_stack->le_random_address, 0, 6); 3154 hci_stack->le_random_address_set = 0; 3155 #endif 3156 #ifdef ENABLE_LE_CENTRAL 3157 hci_stack->le_scanning_active = 0; 3158 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3159 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3160 hci_stack->le_whitelist_capacity = 0; 3161 #endif 3162 } 3163 3164 #ifdef ENABLE_CLASSIC 3165 /** 3166 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3167 */ 3168 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3169 // store and open remote device db 3170 hci_stack->link_key_db = link_key_db; 3171 if (hci_stack->link_key_db) { 3172 hci_stack->link_key_db->open(); 3173 } 3174 } 3175 #endif 3176 3177 void hci_init(const hci_transport_t *transport, const void *config){ 3178 3179 #ifdef HAVE_MALLOC 3180 if (!hci_stack) { 3181 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3182 } 3183 #else 3184 hci_stack = &hci_stack_static; 3185 #endif 3186 memset(hci_stack, 0, sizeof(hci_stack_t)); 3187 3188 // reference to use transport layer implementation 3189 hci_stack->hci_transport = transport; 3190 3191 // reference to used config 3192 hci_stack->config = config; 3193 3194 // setup pointer for outgoing packet buffer 3195 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3196 3197 // max acl payload size defined in config.h 3198 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3199 3200 // register packet handlers with transport 3201 transport->register_packet_handler(&packet_handler); 3202 3203 hci_stack->state = HCI_STATE_OFF; 3204 3205 // class of device 3206 hci_stack->class_of_device = 0x007a020c; // Smartphone 3207 3208 // bondable by default 3209 hci_stack->bondable = 1; 3210 3211 #ifdef ENABLE_CLASSIC 3212 // classic name 3213 hci_stack->local_name = default_classic_name; 3214 3215 // Master slave policy 3216 hci_stack->master_slave_policy = 1; 3217 3218 // Allow Role Switch 3219 hci_stack->allow_role_switch = 1; 3220 3221 // Default / minimum security level = 2 3222 hci_stack->gap_security_level = LEVEL_2; 3223 3224 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3225 hci_stack->gap_required_encyrption_key_size = 7; 3226 3227 // Link Supervision Timeout 3228 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3229 3230 #endif 3231 3232 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3233 hci_stack->ssp_enable = 1; 3234 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3235 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3236 hci_stack->ssp_auto_accept = 1; 3237 3238 // Secure Connections: enable (requires support from Controller) 3239 hci_stack->secure_connections_enable = true; 3240 3241 // voice setting - signed 16 bit pcm data with CVSD over the air 3242 hci_stack->sco_voice_setting = 0x60; 3243 3244 #ifdef ENABLE_LE_CENTRAL 3245 // connection parameter to use for outgoing connections 3246 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3247 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3248 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3249 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3250 hci_stack->le_connection_latency = 4; // 4 3251 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3252 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3253 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3254 3255 // default LE Scanning 3256 hci_stack->le_scan_type = 0x1; // active 3257 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3258 hci_stack->le_scan_window = 0x30; // 30 ms 3259 #endif 3260 3261 #ifdef ENABLE_LE_PERIPHERAL 3262 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3263 #endif 3264 3265 // connection parameter range used to answer connection parameter update requests in l2cap 3266 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3267 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3268 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3269 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3270 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3271 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3272 3273 hci_state_reset(); 3274 } 3275 3276 void hci_deinit(void){ 3277 #ifdef HAVE_MALLOC 3278 if (hci_stack) { 3279 free(hci_stack); 3280 } 3281 #endif 3282 hci_stack = NULL; 3283 3284 #ifdef ENABLE_CLASSIC 3285 disable_l2cap_timeouts = 0; 3286 #endif 3287 } 3288 3289 /** 3290 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3291 */ 3292 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3293 hci_stack->chipset = chipset_driver; 3294 3295 // reset chipset driver - init is also called on power_up 3296 if (hci_stack->chipset && hci_stack->chipset->init){ 3297 hci_stack->chipset->init(hci_stack->config); 3298 } 3299 } 3300 3301 /** 3302 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3303 */ 3304 void hci_set_control(const btstack_control_t *hardware_control){ 3305 // references to used control implementation 3306 hci_stack->control = hardware_control; 3307 // init with transport config 3308 hardware_control->init(hci_stack->config); 3309 } 3310 3311 void hci_close(void){ 3312 3313 #ifdef ENABLE_CLASSIC 3314 // close remote device db 3315 if (hci_stack->link_key_db) { 3316 hci_stack->link_key_db->close(); 3317 } 3318 #endif 3319 3320 btstack_linked_list_iterator_t lit; 3321 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3322 while (btstack_linked_list_iterator_has_next(&lit)){ 3323 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3324 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3325 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3326 hci_shutdown_connection(connection); 3327 } 3328 3329 hci_power_control(HCI_POWER_OFF); 3330 3331 #ifdef HAVE_MALLOC 3332 free(hci_stack); 3333 #endif 3334 hci_stack = NULL; 3335 } 3336 3337 #ifdef HAVE_SCO_TRANSPORT 3338 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3339 hci_stack->sco_transport = sco_transport; 3340 sco_transport->register_packet_handler(&packet_handler); 3341 } 3342 #endif 3343 3344 #ifdef ENABLE_CLASSIC 3345 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3346 // validate ranage and set 3347 if (encryption_key_size < 7) return; 3348 if (encryption_key_size > 16) return; 3349 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3350 } 3351 3352 void gap_set_security_level(gap_security_level_t security_level){ 3353 hci_stack->gap_security_level = security_level; 3354 } 3355 3356 gap_security_level_t gap_get_security_level(void){ 3357 return hci_stack->gap_security_level; 3358 } 3359 3360 void gap_set_secure_connections_only_mode(bool enable){ 3361 hci_stack->gap_secure_connections_only_mode = enable; 3362 } 3363 3364 bool gap_get_secure_connections_only_mode(void){ 3365 return hci_stack->gap_secure_connections_only_mode; 3366 } 3367 #endif 3368 3369 #ifdef ENABLE_CLASSIC 3370 void gap_set_class_of_device(uint32_t class_of_device){ 3371 hci_stack->class_of_device = class_of_device; 3372 } 3373 3374 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3375 hci_stack->default_link_policy_settings = default_link_policy_settings; 3376 } 3377 3378 void gap_set_allow_role_switch(bool allow_role_switch){ 3379 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3380 } 3381 3382 uint8_t hci_get_allow_role_switch(void){ 3383 return hci_stack->allow_role_switch; 3384 } 3385 3386 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3387 hci_stack->link_supervision_timeout = link_supervision_timeout; 3388 } 3389 3390 void hci_disable_l2cap_timeout_check(void){ 3391 disable_l2cap_timeouts = 1; 3392 } 3393 #endif 3394 3395 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3396 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3397 void hci_set_bd_addr(bd_addr_t addr){ 3398 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3399 hci_stack->custom_bd_addr_set = 1; 3400 } 3401 #endif 3402 3403 // State-Module-Driver overview 3404 // state module low-level 3405 // HCI_STATE_OFF off close 3406 // HCI_STATE_INITIALIZING, on open 3407 // HCI_STATE_WORKING, on open 3408 // HCI_STATE_HALTING, on open 3409 // HCI_STATE_SLEEPING, off/sleep close 3410 // HCI_STATE_FALLING_ASLEEP on open 3411 3412 static int hci_power_control_on(void){ 3413 3414 // power on 3415 int err = 0; 3416 if (hci_stack->control && hci_stack->control->on){ 3417 err = (*hci_stack->control->on)(); 3418 } 3419 if (err){ 3420 log_error( "POWER_ON failed"); 3421 hci_emit_hci_open_failed(); 3422 return err; 3423 } 3424 3425 // int chipset driver 3426 if (hci_stack->chipset && hci_stack->chipset->init){ 3427 hci_stack->chipset->init(hci_stack->config); 3428 } 3429 3430 // init transport 3431 if (hci_stack->hci_transport->init){ 3432 hci_stack->hci_transport->init(hci_stack->config); 3433 } 3434 3435 // open transport 3436 err = hci_stack->hci_transport->open(); 3437 if (err){ 3438 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3439 if (hci_stack->control && hci_stack->control->off){ 3440 (*hci_stack->control->off)(); 3441 } 3442 hci_emit_hci_open_failed(); 3443 return err; 3444 } 3445 return 0; 3446 } 3447 3448 static void hci_power_control_off(void){ 3449 3450 log_info("hci_power_control_off"); 3451 3452 // close low-level device 3453 hci_stack->hci_transport->close(); 3454 3455 log_info("hci_power_control_off - hci_transport closed"); 3456 3457 // power off 3458 if (hci_stack->control && hci_stack->control->off){ 3459 (*hci_stack->control->off)(); 3460 } 3461 3462 log_info("hci_power_control_off - control closed"); 3463 3464 hci_stack->state = HCI_STATE_OFF; 3465 } 3466 3467 static void hci_power_control_sleep(void){ 3468 3469 log_info("hci_power_control_sleep"); 3470 3471 #if 0 3472 // don't close serial port during sleep 3473 3474 // close low-level device 3475 hci_stack->hci_transport->close(hci_stack->config); 3476 #endif 3477 3478 // sleep mode 3479 if (hci_stack->control && hci_stack->control->sleep){ 3480 (*hci_stack->control->sleep)(); 3481 } 3482 3483 hci_stack->state = HCI_STATE_SLEEPING; 3484 } 3485 3486 static int hci_power_control_wake(void){ 3487 3488 log_info("hci_power_control_wake"); 3489 3490 // wake on 3491 if (hci_stack->control && hci_stack->control->wake){ 3492 (*hci_stack->control->wake)(); 3493 } 3494 3495 #if 0 3496 // open low-level device 3497 int err = hci_stack->hci_transport->open(hci_stack->config); 3498 if (err){ 3499 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3500 if (hci_stack->control && hci_stack->control->off){ 3501 (*hci_stack->control->off)(); 3502 } 3503 hci_emit_hci_open_failed(); 3504 return err; 3505 } 3506 #endif 3507 3508 return 0; 3509 } 3510 3511 static void hci_power_transition_to_initializing(void){ 3512 // set up state machine 3513 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3514 hci_stack->hci_packet_buffer_reserved = 0; 3515 hci_stack->state = HCI_STATE_INITIALIZING; 3516 hci_stack->substate = HCI_INIT_SEND_RESET; 3517 } 3518 3519 // returns error 3520 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3521 int err; 3522 switch (power_mode){ 3523 case HCI_POWER_ON: 3524 err = hci_power_control_on(); 3525 if (err != 0) { 3526 log_error("hci_power_control_on() error %d", err); 3527 return err; 3528 } 3529 hci_power_transition_to_initializing(); 3530 break; 3531 case HCI_POWER_OFF: 3532 // do nothing 3533 break; 3534 case HCI_POWER_SLEEP: 3535 // do nothing (with SLEEP == OFF) 3536 break; 3537 default: 3538 btstack_assert(false); 3539 break; 3540 } 3541 return ERROR_CODE_SUCCESS; 3542 } 3543 3544 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3545 switch (power_mode){ 3546 case HCI_POWER_ON: 3547 // do nothing 3548 break; 3549 case HCI_POWER_OFF: 3550 // no connections yet, just turn it off 3551 hci_power_control_off(); 3552 break; 3553 case HCI_POWER_SLEEP: 3554 // no connections yet, just turn it off 3555 hci_power_control_sleep(); 3556 break; 3557 default: 3558 btstack_assert(false); 3559 break; 3560 } 3561 return ERROR_CODE_SUCCESS; 3562 } 3563 3564 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3565 switch (power_mode){ 3566 case HCI_POWER_ON: 3567 // do nothing 3568 break; 3569 case HCI_POWER_OFF: 3570 // see hci_run 3571 hci_stack->state = HCI_STATE_HALTING; 3572 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3573 break; 3574 case HCI_POWER_SLEEP: 3575 // see hci_run 3576 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3577 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3578 break; 3579 default: 3580 btstack_assert(false); 3581 break; 3582 } 3583 return ERROR_CODE_SUCCESS; 3584 } 3585 3586 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3587 switch (power_mode){ 3588 case HCI_POWER_ON: 3589 hci_power_transition_to_initializing(); 3590 break; 3591 case HCI_POWER_OFF: 3592 // do nothing 3593 break; 3594 case HCI_POWER_SLEEP: 3595 // see hci_run 3596 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3597 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3598 break; 3599 default: 3600 btstack_assert(false); 3601 break; 3602 } 3603 return ERROR_CODE_SUCCESS; 3604 } 3605 3606 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3607 switch (power_mode){ 3608 case HCI_POWER_ON: 3609 3610 #ifdef HAVE_PLATFORM_IPHONE_OS 3611 // nothing to do, if H4 supports power management 3612 if (btstack_control_iphone_power_management_enabled()){ 3613 hci_stack->state = HCI_STATE_INITIALIZING; 3614 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3615 break; 3616 } 3617 #endif 3618 hci_power_transition_to_initializing(); 3619 break; 3620 case HCI_POWER_OFF: 3621 // see hci_run 3622 hci_stack->state = HCI_STATE_HALTING; 3623 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3624 break; 3625 case HCI_POWER_SLEEP: 3626 // do nothing 3627 break; 3628 default: 3629 btstack_assert(false); 3630 break; 3631 } 3632 return ERROR_CODE_SUCCESS; 3633 } 3634 3635 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3636 int err; 3637 switch (power_mode){ 3638 case HCI_POWER_ON: 3639 #ifdef HAVE_PLATFORM_IPHONE_OS 3640 // nothing to do, if H4 supports power management 3641 if (btstack_control_iphone_power_management_enabled()){ 3642 hci_stack->state = HCI_STATE_INITIALIZING; 3643 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3644 hci_update_scan_enable(); 3645 break; 3646 } 3647 #endif 3648 err = hci_power_control_wake(); 3649 if (err) return err; 3650 hci_power_transition_to_initializing(); 3651 break; 3652 case HCI_POWER_OFF: 3653 hci_stack->state = HCI_STATE_HALTING; 3654 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3655 break; 3656 case HCI_POWER_SLEEP: 3657 // do nothing 3658 break; 3659 default: 3660 btstack_assert(false); 3661 break; 3662 } 3663 return ERROR_CODE_SUCCESS; 3664 } 3665 3666 int hci_power_control(HCI_POWER_MODE power_mode){ 3667 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3668 int err = 0; 3669 switch (hci_stack->state){ 3670 case HCI_STATE_OFF: 3671 err = hci_power_control_state_off(power_mode); 3672 break; 3673 case HCI_STATE_INITIALIZING: 3674 err = hci_power_control_state_initializing(power_mode); 3675 break; 3676 case HCI_STATE_WORKING: 3677 err = hci_power_control_state_working(power_mode); 3678 break; 3679 case HCI_STATE_HALTING: 3680 err = hci_power_control_state_halting(power_mode); 3681 break; 3682 case HCI_STATE_FALLING_ASLEEP: 3683 err = hci_power_control_state_falling_asleep(power_mode); 3684 break; 3685 case HCI_STATE_SLEEPING: 3686 err = hci_power_control_state_sleeping(power_mode); 3687 break; 3688 default: 3689 btstack_assert(false); 3690 break; 3691 } 3692 if (err != 0){ 3693 return err; 3694 } 3695 3696 // create internal event 3697 hci_emit_state(); 3698 3699 // trigger next/first action 3700 hci_run(); 3701 3702 return 0; 3703 } 3704 3705 3706 #ifdef ENABLE_CLASSIC 3707 3708 static void hci_update_scan_enable(void){ 3709 // 2 = page scan, 1 = inq scan 3710 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3711 hci_run(); 3712 } 3713 3714 void gap_discoverable_control(uint8_t enable){ 3715 if (enable) enable = 1; // normalize argument 3716 3717 if (hci_stack->discoverable == enable){ 3718 hci_emit_discoverable_enabled(hci_stack->discoverable); 3719 return; 3720 } 3721 3722 hci_stack->discoverable = enable; 3723 hci_update_scan_enable(); 3724 } 3725 3726 void gap_connectable_control(uint8_t enable){ 3727 if (enable) enable = 1; // normalize argument 3728 3729 // don't emit event 3730 if (hci_stack->connectable == enable) return; 3731 3732 hci_stack->connectable = enable; 3733 hci_update_scan_enable(); 3734 } 3735 #endif 3736 3737 void gap_local_bd_addr(bd_addr_t address_buffer){ 3738 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3739 } 3740 3741 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3742 static void hci_host_num_completed_packets(void){ 3743 3744 // create packet manually as arrays are not supported and num_commands should not get reduced 3745 hci_reserve_packet_buffer(); 3746 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3747 3748 uint16_t size = 0; 3749 uint16_t num_handles = 0; 3750 packet[size++] = 0x35; 3751 packet[size++] = 0x0c; 3752 size++; // skip param len 3753 size++; // skip num handles 3754 3755 // add { handle, packets } entries 3756 btstack_linked_item_t * it; 3757 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3758 hci_connection_t * connection = (hci_connection_t *) it; 3759 if (connection->num_packets_completed){ 3760 little_endian_store_16(packet, size, connection->con_handle); 3761 size += 2; 3762 little_endian_store_16(packet, size, connection->num_packets_completed); 3763 size += 2; 3764 // 3765 num_handles++; 3766 connection->num_packets_completed = 0; 3767 } 3768 } 3769 3770 packet[2] = size - 3; 3771 packet[3] = num_handles; 3772 3773 hci_stack->host_completed_packets = 0; 3774 3775 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3776 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3777 3778 // release packet buffer for synchronous transport implementations 3779 if (hci_transport_synchronous()){ 3780 hci_release_packet_buffer(); 3781 hci_emit_transport_packet_sent(); 3782 } 3783 } 3784 #endif 3785 3786 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3787 UNUSED(ds); 3788 hci_stack->substate = HCI_HALTING_CLOSE; 3789 // allow packet handlers to defer final shutdown 3790 hci_emit_state(); 3791 hci_run(); 3792 } 3793 3794 static bool hci_run_acl_fragments(void){ 3795 if (hci_stack->acl_fragmentation_total_size > 0u) { 3796 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3797 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3798 if (connection) { 3799 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3800 hci_send_acl_packet_fragments(connection); 3801 return true; 3802 } 3803 } else { 3804 // connection gone -> discard further fragments 3805 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3806 hci_stack->acl_fragmentation_total_size = 0; 3807 hci_stack->acl_fragmentation_pos = 0; 3808 } 3809 } 3810 return false; 3811 } 3812 3813 #ifdef ENABLE_CLASSIC 3814 static bool hci_run_general_gap_classic(void){ 3815 3816 // decline incoming connections 3817 if (hci_stack->decline_reason){ 3818 uint8_t reason = hci_stack->decline_reason; 3819 hci_stack->decline_reason = 0; 3820 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3821 return true; 3822 } 3823 // write page scan activity 3824 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_interval != 0xffff) && hci_classic_supported()){ 3825 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 3826 hci_stack->new_page_scan_interval = 0xffff; 3827 hci_stack->new_page_scan_window = 0xffff; 3828 return true; 3829 } 3830 // write page scan type 3831 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_type != 0xff) && hci_classic_supported()){ 3832 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 3833 hci_stack->new_page_scan_type = 0xff; 3834 return true; 3835 } 3836 // send scan enable 3837 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3838 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3839 hci_stack->new_scan_enable_value = 0xff; 3840 return true; 3841 } 3842 // start/stop inquiry 3843 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3844 uint8_t duration = hci_stack->inquiry_state; 3845 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 3846 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 3847 return true; 3848 } 3849 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3850 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3851 hci_send_cmd(&hci_inquiry_cancel); 3852 return true; 3853 } 3854 // remote name request 3855 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3856 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3857 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3858 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3859 return true; 3860 } 3861 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3862 // Local OOB data 3863 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 3864 hci_stack->classic_read_local_oob_data = false; 3865 if (hci_stack->local_supported_commands[1] & 0x10u){ 3866 hci_send_cmd(&hci_read_local_extended_oob_data); 3867 } else { 3868 hci_send_cmd(&hci_read_local_oob_data); 3869 } 3870 } 3871 #endif 3872 // pairing 3873 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3874 uint8_t state = hci_stack->gap_pairing_state; 3875 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3876 uint8_t pin_code[16]; 3877 switch (state){ 3878 case GAP_PAIRING_STATE_SEND_PIN: 3879 memset(pin_code, 0, 16); 3880 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 3881 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 3882 break; 3883 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3884 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3885 break; 3886 case GAP_PAIRING_STATE_SEND_PASSKEY: 3887 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3888 break; 3889 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3890 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3891 break; 3892 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3893 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3894 break; 3895 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3896 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3897 break; 3898 default: 3899 break; 3900 } 3901 return true; 3902 } 3903 return false; 3904 } 3905 #endif 3906 3907 #ifdef ENABLE_BLE 3908 static bool hci_run_general_gap_le(void){ 3909 3910 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3911 3912 if (hci_stack->state != HCI_STATE_WORKING) return false; 3913 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3914 3915 3916 // Phase 1: collect what to stop 3917 3918 bool scanning_stop = false; 3919 bool connecting_stop = false; 3920 bool advertising_stop = false; 3921 3922 #ifndef ENABLE_LE_CENTRAL 3923 UNUSED(scanning_stop); 3924 UNUSED(connecting_stop); 3925 #endif 3926 #ifndef ENABLE_LE_PERIPHERAL 3927 UNUSED(advertising_stop); 3928 #endif 3929 3930 // check if whitelist needs modification 3931 bool whitelist_modification_pending = false; 3932 btstack_linked_list_iterator_t lit; 3933 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3934 while (btstack_linked_list_iterator_has_next(&lit)){ 3935 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3936 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3937 whitelist_modification_pending = true; 3938 break; 3939 } 3940 } 3941 // check if resolving list needs modification 3942 bool resolving_list_modification_pending = false; 3943 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3944 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 3945 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 3946 resolving_list_modification_pending = true; 3947 } 3948 #endif 3949 3950 #ifdef ENABLE_LE_CENTRAL 3951 // scanning control 3952 if (hci_stack->le_scanning_active) { 3953 // stop if: 3954 // - parameter change required 3955 // - it's disabled 3956 // - whitelist change required but used for scanning 3957 // - resolving list modified 3958 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 3959 if ((hci_stack->le_scanning_param_update) || 3960 !hci_stack->le_scanning_enabled || 3961 scanning_uses_whitelist || 3962 resolving_list_modification_pending){ 3963 3964 scanning_stop = true; 3965 } 3966 } 3967 #endif 3968 3969 #ifdef ENABLE_LE_CENTRAL 3970 // connecting control 3971 bool connecting_with_whitelist; 3972 switch (hci_stack->le_connecting_state){ 3973 case LE_CONNECTING_DIRECT: 3974 case LE_CONNECTING_WHITELIST: 3975 // stop connecting if: 3976 // - connecting uses white and whitelist modification pending 3977 // - if it got disabled 3978 // - resolving list modified 3979 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 3980 if ((connecting_with_whitelist && whitelist_modification_pending) || 3981 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 3982 resolving_list_modification_pending) { 3983 3984 connecting_stop = true; 3985 } 3986 break; 3987 default: 3988 break; 3989 } 3990 #endif 3991 3992 #ifdef ENABLE_LE_PERIPHERAL 3993 // le advertisement control 3994 if (hci_stack->le_advertisements_active){ 3995 // stop if: 3996 // - parameter change required 3997 // - it's disabled 3998 // - whitelist change required but used for advertisement filter policy 3999 // - resolving list modified 4000 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy > 0; 4001 if ((hci_stack->le_advertisements_todo != 0) || 4002 !hci_stack->le_advertisements_enabled_for_current_roles || 4003 (advertising_uses_whitelist & whitelist_modification_pending) || 4004 resolving_list_modification_pending) { 4005 4006 advertising_stop = true; 4007 } 4008 } 4009 #endif 4010 4011 4012 // Phase 2: stop everything that should be off during modifications 4013 4014 #ifdef ENABLE_LE_CENTRAL 4015 if (scanning_stop){ 4016 hci_stack->le_scanning_active = false; 4017 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4018 return true; 4019 } 4020 #endif 4021 4022 #ifdef ENABLE_LE_CENTRAL 4023 if (connecting_stop){ 4024 hci_send_cmd(&hci_le_create_connection_cancel); 4025 return true; 4026 } 4027 #endif 4028 4029 #ifdef ENABLE_LE_PERIPHERAL 4030 if (advertising_stop){ 4031 hci_stack->le_advertisements_active = false; 4032 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4033 return true; 4034 } 4035 #endif 4036 4037 // Phase 3: modify 4038 4039 #ifdef ENABLE_LE_CENTRAL 4040 if (hci_stack->le_scanning_param_update){ 4041 hci_stack->le_scanning_param_update = false; 4042 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4043 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4044 return true; 4045 } 4046 #endif 4047 4048 #ifdef ENABLE_LE_PERIPHERAL 4049 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4050 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4051 hci_send_cmd(&hci_le_set_advertising_parameters, 4052 hci_stack->le_advertisements_interval_min, 4053 hci_stack->le_advertisements_interval_max, 4054 hci_stack->le_advertisements_type, 4055 hci_stack->le_own_addr_type, 4056 hci_stack->le_advertisements_direct_address_type, 4057 hci_stack->le_advertisements_direct_address, 4058 hci_stack->le_advertisements_channel_map, 4059 hci_stack->le_advertisements_filter_policy); 4060 return true; 4061 } 4062 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4063 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4064 uint8_t adv_data_clean[31]; 4065 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4066 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4067 hci_stack->le_advertisements_data_len); 4068 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4069 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4070 return true; 4071 } 4072 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4073 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4074 uint8_t scan_data_clean[31]; 4075 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4076 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4077 hci_stack->le_scan_response_data_len); 4078 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4079 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4080 return true; 4081 } 4082 #endif 4083 4084 4085 #ifdef ENABLE_LE_CENTRAL 4086 // if connect with whitelist was active and is not cancelled yet, wait until next time 4087 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4088 #endif 4089 4090 // LE Whitelist Management 4091 if (whitelist_modification_pending){ 4092 // add/remove entries 4093 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4094 while (btstack_linked_list_iterator_has_next(&lit)){ 4095 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4096 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4097 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4098 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4099 return true; 4100 } 4101 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4102 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4103 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4104 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4105 return true; 4106 } 4107 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4108 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4109 btstack_memory_whitelist_entry_free(entry); 4110 } 4111 } 4112 } 4113 4114 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4115 // LE Resolving List Management 4116 if (resolving_list_supported) { 4117 uint16_t i; 4118 switch (hci_stack->le_resolving_list_state) { 4119 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4120 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4121 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4122 return true; 4123 case LE_RESOLVING_LIST_READ_SIZE: 4124 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4125 hci_send_cmd(&hci_le_read_resolving_list_size); 4126 return true; 4127 case LE_RESOLVING_LIST_SEND_CLEAR: 4128 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4129 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4130 sizeof(hci_stack->le_resolving_list_add_entries)); 4131 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4132 sizeof(hci_stack->le_resolving_list_remove_entries)); 4133 hci_send_cmd(&hci_le_clear_resolving_list); 4134 return true; 4135 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4136 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4137 uint8_t offset = i >> 3; 4138 uint8_t mask = 1 << (i & 7); 4139 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4140 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4141 bd_addr_t peer_identity_addreses; 4142 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4143 sm_key_t peer_irk; 4144 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4145 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4146 4147 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4148 // trigger whitelist entry 'update' (work around for controller bug) 4149 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4150 while (btstack_linked_list_iterator_has_next(&lit)) { 4151 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4152 if (entry->address_type != peer_identity_addr_type) continue; 4153 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4154 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4155 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4156 } 4157 #endif 4158 4159 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4160 peer_identity_addreses); 4161 return true; 4162 } 4163 4164 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4165 4166 /* fall through */ 4167 4168 case LE_RESOLVING_LIST_ADD_ENTRIES: 4169 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4170 uint8_t offset = i >> 3; 4171 uint8_t mask = 1 << (i & 7); 4172 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4173 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4174 bd_addr_t peer_identity_addreses; 4175 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4176 sm_key_t peer_irk; 4177 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4178 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4179 const uint8_t *local_irk = gap_get_persistent_irk(); 4180 // command uses format specifier 'P' that stores 16-byte value without flip 4181 uint8_t local_irk_flipped[16]; 4182 uint8_t peer_irk_flipped[16]; 4183 reverse_128(local_irk, local_irk_flipped); 4184 reverse_128(peer_irk, peer_irk_flipped); 4185 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4186 peer_irk_flipped, local_irk_flipped); 4187 return true; 4188 } 4189 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4190 break; 4191 4192 default: 4193 break; 4194 } 4195 } 4196 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4197 #endif 4198 4199 // Phase 4: restore state 4200 4201 #ifdef ENABLE_LE_CENTRAL 4202 // re-start scanning 4203 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4204 hci_stack->le_scanning_active = true; 4205 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4206 return true; 4207 } 4208 #endif 4209 4210 #ifdef ENABLE_LE_CENTRAL 4211 // re-start connecting 4212 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4213 bd_addr_t null_addr; 4214 memset(null_addr, 0, 6); 4215 hci_send_cmd(&hci_le_create_connection, 4216 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4217 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4218 1, // use whitelist 4219 0, // peer address type 4220 null_addr, // peer bd addr 4221 hci_stack->le_own_addr_type, // our addr type: 4222 hci_stack->le_connection_interval_min, // conn interval min 4223 hci_stack->le_connection_interval_max, // conn interval max 4224 hci_stack->le_connection_latency, // conn latency 4225 hci_stack->le_supervision_timeout, // conn latency 4226 hci_stack->le_minimum_ce_length, // min ce length 4227 hci_stack->le_maximum_ce_length // max ce length 4228 ); 4229 return true; 4230 } 4231 #endif 4232 4233 #ifdef ENABLE_LE_PERIPHERAL 4234 // re-start advertising 4235 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4236 // check if advertisements should be enabled given 4237 hci_stack->le_advertisements_active = true; 4238 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4239 return true; 4240 } 4241 #endif 4242 4243 return false; 4244 } 4245 #endif 4246 4247 static bool hci_run_general_pending_commands(void){ 4248 btstack_linked_item_t * it; 4249 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4250 hci_connection_t * connection = (hci_connection_t *) it; 4251 4252 switch(connection->state){ 4253 case SEND_CREATE_CONNECTION: 4254 switch(connection->address_type){ 4255 #ifdef ENABLE_CLASSIC 4256 case BD_ADDR_TYPE_ACL: 4257 log_info("sending hci_create_connection"); 4258 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4259 break; 4260 #endif 4261 default: 4262 #ifdef ENABLE_BLE 4263 #ifdef ENABLE_LE_CENTRAL 4264 log_info("sending hci_le_create_connection"); 4265 hci_send_cmd(&hci_le_create_connection, 4266 hci_stack->le_connection_scan_interval, // conn scan interval 4267 hci_stack->le_connection_scan_window, // conn scan windows 4268 0, // don't use whitelist 4269 connection->address_type, // peer address type 4270 connection->address, // peer bd addr 4271 hci_stack->le_own_addr_type, // our addr type: 4272 hci_stack->le_connection_interval_min, // conn interval min 4273 hci_stack->le_connection_interval_max, // conn interval max 4274 hci_stack->le_connection_latency, // conn latency 4275 hci_stack->le_supervision_timeout, // conn latency 4276 hci_stack->le_minimum_ce_length, // min ce length 4277 hci_stack->le_maximum_ce_length // max ce length 4278 ); 4279 connection->state = SENT_CREATE_CONNECTION; 4280 #endif 4281 #endif 4282 break; 4283 } 4284 return true; 4285 4286 #ifdef ENABLE_CLASSIC 4287 case RECEIVED_CONNECTION_REQUEST: 4288 connection->role = HCI_ROLE_SLAVE; 4289 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4290 log_info("sending hci_accept_connection_request"); 4291 connection->state = ACCEPTED_CONNECTION_REQUEST; 4292 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4293 } 4294 return true; 4295 #endif 4296 4297 #ifdef ENABLE_BLE 4298 #ifdef ENABLE_LE_CENTRAL 4299 case SEND_CANCEL_CONNECTION: 4300 connection->state = SENT_CANCEL_CONNECTION; 4301 hci_send_cmd(&hci_le_create_connection_cancel); 4302 return true; 4303 #endif 4304 #endif 4305 case SEND_DISCONNECT: 4306 connection->state = SENT_DISCONNECT; 4307 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4308 return true; 4309 4310 default: 4311 break; 4312 } 4313 4314 // no further commands if connection is about to get shut down 4315 if (connection->state == SENT_DISCONNECT) continue; 4316 4317 if (connection->authentication_flags & READ_RSSI){ 4318 connectionClearAuthenticationFlags(connection, READ_RSSI); 4319 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4320 return true; 4321 } 4322 4323 #ifdef ENABLE_CLASSIC 4324 4325 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4326 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4327 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4328 return true; 4329 } 4330 4331 // Handling link key request requires remote supported features 4332 if ( ((connection->authentication_flags & HANDLE_LINK_KEY_REQUEST) != 0) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4333 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4334 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4335 4336 link_key_t link_key; 4337 link_key_type_t link_key_type; 4338 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 4339 4340 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4341 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4342 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 4343 if (sc_downgrade){ 4344 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4345 connection->state = SENT_DISCONNECT; 4346 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4347 return true; 4348 } 4349 4350 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 4351 if (have_link_key && security_level_sufficient){ 4352 connection->link_key_type = link_key_type; 4353 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 4354 } else { 4355 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4356 } 4357 return true; 4358 } 4359 4360 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4361 log_info("denying to pin request"); 4362 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4363 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4364 return true; 4365 } 4366 4367 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4368 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4369 // set authentication requirements: 4370 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4371 // - BONDING MODE: Dedicated if requested, otherwise bondable flag 4372 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4373 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4374 authreq |= 1; 4375 } 4376 if (connection->bonding_flags & BONDING_DEDICATED){ 4377 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4378 } else if (hci_stack->bondable){ 4379 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4380 } 4381 uint8_t have_oob_data = 0; 4382 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4383 if (connection->classic_oob_c_192 != NULL){ 4384 have_oob_data |= 1; 4385 } 4386 if (connection->classic_oob_c_256 != NULL){ 4387 have_oob_data |= 2; 4388 } 4389 #endif 4390 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4391 return true; 4392 } 4393 4394 if (connection->authentication_flags & SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4395 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4396 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4397 return true; 4398 } 4399 4400 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4401 if (connection->authentication_flags & SEND_REMOTE_OOB_DATA_REPLY){ 4402 connectionClearAuthenticationFlags(connection, SEND_REMOTE_OOB_DATA_REPLY); 4403 const uint8_t zero[16] = { 0 }; 4404 const uint8_t * r_192 = zero; 4405 const uint8_t * c_192 = zero; 4406 const uint8_t * r_256 = zero; 4407 const uint8_t * c_256 = zero; 4408 // verify P-256 OOB 4409 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4410 c_256 = connection->classic_oob_c_256; 4411 if (connection->classic_oob_r_256 != NULL) { 4412 r_256 = connection->classic_oob_r_256; 4413 } 4414 } 4415 // verify P-192 OOB 4416 if ((connection->classic_oob_c_192 != NULL)) { 4417 c_192 = connection->classic_oob_c_192; 4418 if (connection->classic_oob_r_192 != NULL) { 4419 r_192 = connection->classic_oob_r_192; 4420 } 4421 } 4422 // Reply 4423 if (c_256 != zero) { 4424 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4425 } else if (c_192 != zero){ 4426 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4427 } else { 4428 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4429 } 4430 return true; 4431 } 4432 #endif 4433 4434 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4435 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4436 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4437 return true; 4438 } 4439 4440 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4441 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4442 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4443 return true; 4444 } 4445 4446 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4447 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4448 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4449 return true; 4450 } 4451 4452 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4453 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4454 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4455 return true; 4456 } 4457 4458 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4459 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4460 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4461 return true; 4462 } 4463 4464 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4465 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4466 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4467 connection->state = SENT_DISCONNECT; 4468 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4469 return true; 4470 } 4471 4472 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4473 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4474 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4475 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4476 return true; 4477 } 4478 4479 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4480 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4481 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4482 return true; 4483 } 4484 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4485 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4486 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4487 return true; 4488 } 4489 #endif 4490 4491 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4492 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4493 if (connection->state != SENT_DISCONNECT){ 4494 connection->state = SENT_DISCONNECT; 4495 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4496 return true; 4497 } 4498 } 4499 4500 #ifdef ENABLE_CLASSIC 4501 uint16_t sniff_min_interval; 4502 switch (connection->sniff_min_interval){ 4503 case 0: 4504 break; 4505 case 0xffff: 4506 connection->sniff_min_interval = 0; 4507 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4508 return true; 4509 default: 4510 sniff_min_interval = connection->sniff_min_interval; 4511 connection->sniff_min_interval = 0; 4512 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4513 return true; 4514 } 4515 4516 if (connection->sniff_subrating_max_latency != 0xffff){ 4517 uint16_t max_latency = connection->sniff_subrating_max_latency; 4518 connection->sniff_subrating_max_latency = 0; 4519 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4520 return true; 4521 } 4522 4523 if (connection->qos_service_type != HCI_SERVICE_TyPE_INVALID){ 4524 uint8_t service_type = (uint8_t) connection->qos_service_type; 4525 connection->qos_service_type = HCI_SERVICE_TyPE_INVALID; 4526 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); 4527 return true; 4528 } 4529 4530 if (connection->request_role != HCI_ROLE_INVALID){ 4531 hci_role_t role = connection->request_role; 4532 connection->request_role = HCI_ROLE_INVALID; 4533 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4534 return true; 4535 } 4536 #endif 4537 4538 #ifdef ENABLE_BLE 4539 switch (connection->le_con_parameter_update_state){ 4540 // response to L2CAP CON PARAMETER UPDATE REQUEST 4541 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4542 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4543 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4544 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4545 0x0000, 0xffff); 4546 return true; 4547 case CON_PARAMETER_UPDATE_REPLY: 4548 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4549 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4550 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4551 0x0000, 0xffff); 4552 return true; 4553 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4554 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4555 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4556 return true; 4557 default: 4558 break; 4559 } 4560 if (connection->le_phy_update_all_phys != 0xffu){ 4561 uint8_t all_phys = connection->le_phy_update_all_phys; 4562 connection->le_phy_update_all_phys = 0xff; 4563 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); 4564 return true; 4565 } 4566 #endif 4567 } 4568 return false; 4569 } 4570 4571 static void hci_run(void){ 4572 4573 bool done; 4574 4575 // send continuation fragments first, as they block the prepared packet buffer 4576 done = hci_run_acl_fragments(); 4577 if (done) return; 4578 4579 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4580 // send host num completed packets next as they don't require num_cmd_packets > 0 4581 if (!hci_can_send_comand_packet_transport()) return; 4582 if (hci_stack->host_completed_packets){ 4583 hci_host_num_completed_packets(); 4584 return; 4585 } 4586 #endif 4587 4588 if (!hci_can_send_command_packet_now()) return; 4589 4590 // global/non-connection oriented commands 4591 4592 4593 #ifdef ENABLE_CLASSIC 4594 // general gap classic 4595 done = hci_run_general_gap_classic(); 4596 if (done) return; 4597 #endif 4598 4599 #ifdef ENABLE_BLE 4600 // general gap le 4601 done = hci_run_general_gap_le(); 4602 if (done) return; 4603 #endif 4604 4605 // send pending HCI commands 4606 done = hci_run_general_pending_commands(); 4607 if (done) return; 4608 4609 // stack state sub statemachines 4610 hci_connection_t * connection; 4611 switch (hci_stack->state){ 4612 case HCI_STATE_INITIALIZING: 4613 hci_initializing_run(); 4614 break; 4615 4616 case HCI_STATE_HALTING: 4617 4618 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4619 switch (hci_stack->substate){ 4620 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4621 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4622 4623 #ifdef ENABLE_BLE 4624 #ifdef ENABLE_LE_CENTRAL 4625 // free whitelist entries 4626 { 4627 btstack_linked_list_iterator_t lit; 4628 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4629 while (btstack_linked_list_iterator_has_next(&lit)){ 4630 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4631 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4632 btstack_memory_whitelist_entry_free(entry); 4633 } 4634 } 4635 #endif 4636 #endif 4637 // close all open connections 4638 connection = (hci_connection_t *) hci_stack->connections; 4639 if (connection){ 4640 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4641 if (!hci_can_send_command_packet_now()) return; 4642 4643 // check state 4644 if (connection->state == SENT_DISCONNECT) return; 4645 connection->state = SENT_DISCONNECT; 4646 4647 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4648 4649 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4650 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4651 4652 // ... which would be ignored anyway as we shutdown (free) the connection now 4653 hci_shutdown_connection(connection); 4654 4655 // finally, send the disconnect command 4656 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4657 return; 4658 } 4659 4660 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4661 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4662 log_info("HCI_STATE_HALTING: wait 50 ms"); 4663 hci_stack->substate = HCI_HALTING_W4_TIMER; 4664 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4665 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4666 btstack_run_loop_add_timer(&hci_stack->timeout); 4667 break; 4668 } 4669 4670 /* fall through */ 4671 4672 case HCI_HALTING_CLOSE: 4673 log_info("HCI_STATE_HALTING, calling off"); 4674 4675 // switch mode 4676 hci_power_control_off(); 4677 4678 log_info("HCI_STATE_HALTING, emitting state"); 4679 hci_emit_state(); 4680 log_info("HCI_STATE_HALTING, done"); 4681 break; 4682 4683 case HCI_HALTING_W4_TIMER: 4684 // keep waiting 4685 4686 break; 4687 default: 4688 break; 4689 } 4690 4691 break; 4692 4693 case HCI_STATE_FALLING_ASLEEP: 4694 switch(hci_stack->substate) { 4695 case HCI_FALLING_ASLEEP_DISCONNECT: 4696 log_info("HCI_STATE_FALLING_ASLEEP"); 4697 // close all open connections 4698 connection = (hci_connection_t *) hci_stack->connections; 4699 4700 #ifdef HAVE_PLATFORM_IPHONE_OS 4701 // don't close connections, if H4 supports power management 4702 if (btstack_control_iphone_power_management_enabled()){ 4703 connection = NULL; 4704 } 4705 #endif 4706 if (connection){ 4707 4708 // send disconnect 4709 if (!hci_can_send_command_packet_now()) return; 4710 4711 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4712 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4713 4714 // send disconnected event right away - causes higher layer connections to get closed, too. 4715 hci_shutdown_connection(connection); 4716 return; 4717 } 4718 4719 if (hci_classic_supported()){ 4720 // disable page and inquiry scan 4721 if (!hci_can_send_command_packet_now()) return; 4722 4723 log_info("HCI_STATE_HALTING, disabling inq scans"); 4724 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4725 4726 // continue in next sub state 4727 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4728 break; 4729 } 4730 4731 /* fall through */ 4732 4733 case HCI_FALLING_ASLEEP_COMPLETE: 4734 log_info("HCI_STATE_HALTING, calling sleep"); 4735 #ifdef HAVE_PLATFORM_IPHONE_OS 4736 // don't actually go to sleep, if H4 supports power management 4737 if (btstack_control_iphone_power_management_enabled()){ 4738 // SLEEP MODE reached 4739 hci_stack->state = HCI_STATE_SLEEPING; 4740 hci_emit_state(); 4741 break; 4742 } 4743 #endif 4744 // switch mode 4745 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4746 hci_emit_state(); 4747 break; 4748 4749 default: 4750 break; 4751 } 4752 break; 4753 4754 default: 4755 break; 4756 } 4757 } 4758 4759 int hci_send_cmd_packet(uint8_t *packet, int size){ 4760 // house-keeping 4761 4762 #ifdef ENABLE_CLASSIC 4763 bd_addr_t addr; 4764 hci_connection_t * conn; 4765 #endif 4766 #ifdef ENABLE_LE_CENTRAL 4767 uint8_t initiator_filter_policy; 4768 #endif 4769 4770 uint16_t opcode = little_endian_read_16(packet, 0); 4771 switch (opcode) { 4772 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4773 hci_stack->loopback_mode = packet[3]; 4774 break; 4775 4776 #ifdef ENABLE_CLASSIC 4777 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4778 reverse_bd_addr(&packet[3], addr); 4779 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4780 4781 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4782 if (!conn) { 4783 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4784 if (!conn) { 4785 // notify client that alloc failed 4786 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4787 return -1; // packet not sent to controller 4788 } 4789 conn->state = SEND_CREATE_CONNECTION; 4790 conn->role = HCI_ROLE_MASTER; 4791 } 4792 log_info("conn state %u", conn->state); 4793 switch (conn->state) { 4794 // if connection active exists 4795 case OPEN: 4796 // and OPEN, emit connection complete command 4797 hci_emit_connection_complete(addr, conn->con_handle, 0); 4798 return -1; // packet not sent to controller 4799 case RECEIVED_DISCONNECTION_COMPLETE: 4800 // create connection triggered in disconnect complete event, let's do it now 4801 break; 4802 case SEND_CREATE_CONNECTION: 4803 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4804 break; 4805 default: 4806 // otherwise, just ignore as it is already in the open process 4807 return -1; // packet not sent to controller 4808 } 4809 conn->state = SENT_CREATE_CONNECTION; 4810 4811 // track outgoing connection 4812 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4813 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4814 break; 4815 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4816 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4817 break; 4818 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4819 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4820 break; 4821 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4822 if (hci_stack->link_key_db) { 4823 reverse_bd_addr(&packet[3], addr); 4824 hci_stack->link_key_db->delete_link_key(addr); 4825 } 4826 break; 4827 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4828 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4829 reverse_bd_addr(&packet[3], addr); 4830 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4831 if (conn) { 4832 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4833 } 4834 break; 4835 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4836 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4837 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4838 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4839 reverse_bd_addr(&packet[3], addr); 4840 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4841 if (conn) { 4842 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4843 } 4844 break; 4845 4846 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 4847 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4848 // setup_synchronous_connection? Voice setting at offset 22 4849 // TODO: compare to current setting if sco connection already active 4850 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4851 break; 4852 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4853 // accept_synchronus_connection? Voice setting at offset 18 4854 // TODO: compare to current setting if sco connection already active 4855 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4856 break; 4857 #endif 4858 #endif 4859 4860 #ifdef ENABLE_BLE 4861 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4862 hci_stack->le_random_address_set = 1; 4863 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4864 break; 4865 #ifdef ENABLE_LE_PERIPHERAL 4866 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4867 hci_stack->le_advertisements_active = packet[3] != 0; 4868 break; 4869 #endif 4870 #ifdef ENABLE_LE_CENTRAL 4871 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4872 // white list used? 4873 initiator_filter_policy = packet[7]; 4874 switch (initiator_filter_policy) { 4875 case 0: 4876 // whitelist not used 4877 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4878 break; 4879 case 1: 4880 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4881 break; 4882 default: 4883 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4884 break; 4885 } 4886 // track outgoing connection 4887 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 4888 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 4889 break; 4890 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4891 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 4892 break; 4893 #endif 4894 #endif 4895 default: 4896 break; 4897 } 4898 4899 hci_stack->num_cmd_packets--; 4900 4901 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4902 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4903 } 4904 4905 // disconnect because of security block 4906 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4907 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4908 if (!connection) return; 4909 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4910 } 4911 4912 4913 // Configure Secure Simple Pairing 4914 4915 #ifdef ENABLE_CLASSIC 4916 4917 // enable will enable SSP during init 4918 void gap_ssp_set_enable(int enable){ 4919 hci_stack->ssp_enable = enable; 4920 } 4921 4922 static int hci_local_ssp_activated(void){ 4923 return gap_ssp_supported() && hci_stack->ssp_enable; 4924 } 4925 4926 // if set, BTstack will respond to io capability request using authentication requirement 4927 void gap_ssp_set_io_capability(int io_capability){ 4928 hci_stack->ssp_io_capability = io_capability; 4929 } 4930 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4931 hci_stack->ssp_authentication_requirement = authentication_requirement; 4932 } 4933 4934 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4935 void gap_ssp_set_auto_accept(int auto_accept){ 4936 hci_stack->ssp_auto_accept = auto_accept; 4937 } 4938 4939 void gap_secure_connections_enable(bool enable){ 4940 hci_stack->secure_connections_enable = enable; 4941 } 4942 4943 #endif 4944 4945 // va_list part of hci_send_cmd 4946 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4947 if (!hci_can_send_command_packet_now()){ 4948 log_error("hci_send_cmd called but cannot send packet now"); 4949 return 0; 4950 } 4951 4952 // for HCI INITIALIZATION 4953 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4954 hci_stack->last_cmd_opcode = cmd->opcode; 4955 4956 hci_reserve_packet_buffer(); 4957 uint8_t * packet = hci_stack->hci_packet_buffer; 4958 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4959 int err = hci_send_cmd_packet(packet, size); 4960 4961 // release packet buffer on error or for synchronous transport implementations 4962 if ((err < 0) || hci_transport_synchronous()){ 4963 hci_release_packet_buffer(); 4964 hci_emit_transport_packet_sent(); 4965 } 4966 4967 return err; 4968 } 4969 4970 /** 4971 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4972 */ 4973 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4974 va_list argptr; 4975 va_start(argptr, cmd); 4976 int res = hci_send_cmd_va_arg(cmd, argptr); 4977 va_end(argptr); 4978 return res; 4979 } 4980 4981 // Create various non-HCI events. 4982 // TODO: generalize, use table similar to hci_create_command 4983 4984 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4985 // dump packet 4986 if (dump) { 4987 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4988 } 4989 4990 // dispatch to all event handlers 4991 btstack_linked_list_iterator_t it; 4992 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4993 while (btstack_linked_list_iterator_has_next(&it)){ 4994 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4995 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4996 } 4997 } 4998 4999 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5000 if (!hci_stack->acl_packet_handler) return; 5001 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5002 } 5003 5004 #ifdef ENABLE_CLASSIC 5005 static void hci_notify_if_sco_can_send_now(void){ 5006 // notify SCO sender if waiting 5007 if (!hci_stack->sco_waiting_for_can_send_now) return; 5008 if (hci_can_send_sco_packet_now()){ 5009 hci_stack->sco_waiting_for_can_send_now = 0; 5010 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5011 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5012 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5013 } 5014 } 5015 5016 // parsing end emitting has been merged to reduce code size 5017 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5018 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 5019 5020 uint8_t * eir_data; 5021 ad_context_t context; 5022 const uint8_t * name; 5023 uint8_t name_len; 5024 5025 if (size < 3) return; 5026 5027 int event_type = hci_event_packet_get_type(packet); 5028 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5029 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5030 5031 switch (event_type){ 5032 case HCI_EVENT_INQUIRY_RESULT: 5033 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5034 if (size != (3 + (num_responses * 14))) return; 5035 break; 5036 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5037 if (size != 257) return; 5038 if (num_responses != 1) return; 5039 break; 5040 default: 5041 return; 5042 } 5043 5044 // event[1] is set at the end 5045 int i; 5046 for (i=0; i<num_responses;i++){ 5047 memset(event, 0, sizeof(event)); 5048 event[0] = GAP_EVENT_INQUIRY_RESULT; 5049 uint8_t event_size = 18; // if name is not set by EIR 5050 5051 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5052 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5053 (void)memcpy(&event[9], 5054 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5055 3); // class of device 5056 (void)memcpy(&event[12], 5057 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5058 2); // clock offset 5059 5060 switch (event_type){ 5061 case HCI_EVENT_INQUIRY_RESULT: 5062 // 14,15,16,17 = 0, size 18 5063 break; 5064 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5065 event[14] = 1; 5066 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5067 // 16,17 = 0, size 18 5068 break; 5069 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5070 event[14] = 1; 5071 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5072 // EIR packets only contain a single inquiry response 5073 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5074 name = NULL; 5075 // Iterate over EIR data 5076 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5077 uint8_t data_type = ad_iterator_get_data_type(&context); 5078 uint8_t data_size = ad_iterator_get_data_len(&context); 5079 const uint8_t * data = ad_iterator_get_data(&context); 5080 // Prefer Complete Local Name over Shortend Local Name 5081 switch (data_type){ 5082 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5083 if (name) continue; 5084 /* fall through */ 5085 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5086 name = data; 5087 name_len = data_size; 5088 break; 5089 default: 5090 break; 5091 } 5092 } 5093 if (name){ 5094 event[16] = 1; 5095 // truncate name if needed 5096 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5097 event[17] = len; 5098 (void)memcpy(&event[18], name, len); 5099 event_size += len; 5100 } 5101 break; 5102 default: 5103 return; 5104 } 5105 event[1] = event_size - 2; 5106 hci_emit_event(event, event_size, 1); 5107 } 5108 } 5109 #endif 5110 5111 void hci_emit_state(void){ 5112 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5113 uint8_t event[3]; 5114 event[0] = BTSTACK_EVENT_STATE; 5115 event[1] = sizeof(event) - 2u; 5116 event[2] = hci_stack->state; 5117 hci_emit_event(event, sizeof(event), 1); 5118 } 5119 5120 #ifdef ENABLE_CLASSIC 5121 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5122 uint8_t event[13]; 5123 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5124 event[1] = sizeof(event) - 2; 5125 event[2] = status; 5126 little_endian_store_16(event, 3, con_handle); 5127 reverse_bd_addr(address, &event[5]); 5128 event[11] = 1; // ACL connection 5129 event[12] = 0; // encryption disabled 5130 hci_emit_event(event, sizeof(event), 1); 5131 } 5132 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5133 if (disable_l2cap_timeouts) return; 5134 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5135 uint8_t event[4]; 5136 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5137 event[1] = sizeof(event) - 2; 5138 little_endian_store_16(event, 2, conn->con_handle); 5139 hci_emit_event(event, sizeof(event), 1); 5140 } 5141 #endif 5142 5143 #ifdef ENABLE_BLE 5144 #ifdef ENABLE_LE_CENTRAL 5145 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){ 5146 uint8_t event[21]; 5147 event[0] = HCI_EVENT_LE_META; 5148 event[1] = sizeof(event) - 2u; 5149 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5150 event[3] = status; 5151 little_endian_store_16(event, 4, con_handle); 5152 event[6] = 0; // TODO: role 5153 event[7] = address_type; 5154 reverse_bd_addr(address, &event[8]); 5155 little_endian_store_16(event, 14, 0); // interval 5156 little_endian_store_16(event, 16, 0); // latency 5157 little_endian_store_16(event, 18, 0); // supervision timeout 5158 event[20] = 0; // master clock accuracy 5159 hci_emit_event(event, sizeof(event), 1); 5160 } 5161 #endif 5162 #endif 5163 5164 static void hci_emit_transport_packet_sent(void){ 5165 // notify upper stack that it might be possible to send again 5166 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5167 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5168 } 5169 5170 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5171 uint8_t event[6]; 5172 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5173 event[1] = sizeof(event) - 2u; 5174 event[2] = 0; // status = OK 5175 little_endian_store_16(event, 3, con_handle); 5176 event[5] = reason; 5177 hci_emit_event(event, sizeof(event), 1); 5178 } 5179 5180 static void hci_emit_nr_connections_changed(void){ 5181 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5182 uint8_t event[3]; 5183 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5184 event[1] = sizeof(event) - 2u; 5185 event[2] = nr_hci_connections(); 5186 hci_emit_event(event, sizeof(event), 1); 5187 } 5188 5189 static void hci_emit_hci_open_failed(void){ 5190 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5191 uint8_t event[2]; 5192 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5193 event[1] = sizeof(event) - 2u; 5194 hci_emit_event(event, sizeof(event), 1); 5195 } 5196 5197 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5198 log_info("hci_emit_dedicated_bonding_result %u ", status); 5199 uint8_t event[9]; 5200 int pos = 0; 5201 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5202 event[pos++] = sizeof(event) - 2u; 5203 event[pos++] = status; 5204 reverse_bd_addr(address, &event[pos]); 5205 hci_emit_event(event, sizeof(event), 1); 5206 } 5207 5208 5209 #ifdef ENABLE_CLASSIC 5210 5211 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5212 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5213 uint8_t event[5]; 5214 int pos = 0; 5215 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5216 event[pos++] = sizeof(event) - 2; 5217 little_endian_store_16(event, 2, con_handle); 5218 pos += 2; 5219 event[pos++] = level; 5220 hci_emit_event(event, sizeof(event), 1); 5221 } 5222 5223 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5224 if (!connection) return LEVEL_0; 5225 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5226 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5227 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5228 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5229 // LEVEL 4 always requires 128 bit encrytion key size 5230 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5231 security_level = LEVEL_3; 5232 } 5233 return security_level; 5234 } 5235 5236 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5237 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5238 uint8_t event[3]; 5239 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5240 event[1] = sizeof(event) - 2; 5241 event[2] = enabled; 5242 hci_emit_event(event, sizeof(event), 1); 5243 } 5244 5245 // query if remote side supports eSCO 5246 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5247 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5248 if (!connection) return 0; 5249 return (connection->remote_supported_features[0] & 1) != 0; 5250 } 5251 5252 static bool hci_ssp_supported(hci_connection_t * connection){ 5253 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5254 return (connection->bonding_flags & mask) == mask; 5255 } 5256 5257 // query if remote side supports SSP 5258 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5259 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5260 if (!connection) return 0; 5261 return hci_ssp_supported(connection) ? 1 : 0; 5262 } 5263 5264 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5265 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5266 } 5267 5268 // GAP API 5269 /** 5270 * @bbrief enable/disable bonding. default is enabled 5271 * @praram enabled 5272 */ 5273 void gap_set_bondable_mode(int enable){ 5274 hci_stack->bondable = enable ? 1 : 0; 5275 } 5276 /** 5277 * @brief Get bondable mode. 5278 * @return 1 if bondable 5279 */ 5280 int gap_get_bondable_mode(void){ 5281 return hci_stack->bondable; 5282 } 5283 5284 /** 5285 * @brief map link keys to security levels 5286 */ 5287 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5288 switch (link_key_type){ 5289 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5290 return LEVEL_4; 5291 case COMBINATION_KEY: 5292 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5293 return LEVEL_3; 5294 default: 5295 return LEVEL_2; 5296 } 5297 } 5298 5299 /** 5300 * @brief map link keys to secure connection yes/no 5301 */ 5302 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5303 switch (link_key_type){ 5304 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5305 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5306 return 1; 5307 default: 5308 return 0; 5309 } 5310 } 5311 5312 /** 5313 * @brief map link keys to authenticated 5314 */ 5315 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5316 switch (link_key_type){ 5317 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5318 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5319 return 1; 5320 default: 5321 return 0; 5322 } 5323 } 5324 5325 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5326 log_info("gap_mitm_protection_required_for_security_level %u", level); 5327 return level > LEVEL_2; 5328 } 5329 5330 /** 5331 * @brief get current security level 5332 */ 5333 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5334 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5335 if (!connection) return LEVEL_0; 5336 return gap_security_level_for_connection(connection); 5337 } 5338 5339 /** 5340 * @brief request connection to device to 5341 * @result GAP_AUTHENTICATION_RESULT 5342 */ 5343 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5344 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5345 if (!connection){ 5346 hci_emit_security_level(con_handle, LEVEL_0); 5347 return; 5348 } 5349 5350 btstack_assert(hci_is_le_connection(connection) == false); 5351 5352 gap_security_level_t current_level = gap_security_level(con_handle); 5353 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5354 requested_level, connection->requested_security_level, current_level); 5355 5356 // authentication already active if planned level > 0 5357 if (connection->requested_security_level > LEVEL_0){ 5358 // authentication already active 5359 if (connection->requested_security_level < requested_level){ 5360 // increase requested level as new level is higher 5361 // TODO: handle re-authentication when done 5362 connection->requested_security_level = requested_level; 5363 } 5364 } else { 5365 // no request active, notify if security sufficient 5366 if (requested_level <= current_level){ 5367 hci_emit_security_level(con_handle, current_level); 5368 return; 5369 } 5370 5371 // store request 5372 connection->requested_security_level = requested_level; 5373 5374 // start to authenticate connection 5375 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5376 hci_run(); 5377 } 5378 } 5379 5380 /** 5381 * @brief start dedicated bonding with device. disconnect after bonding 5382 * @param device 5383 * @param request MITM protection 5384 * @result GAP_DEDICATED_BONDING_COMPLETE 5385 */ 5386 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5387 5388 // create connection state machine 5389 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5390 5391 if (!connection){ 5392 return BTSTACK_MEMORY_ALLOC_FAILED; 5393 } 5394 5395 // delete linkn key 5396 gap_drop_link_key_for_bd_addr(device); 5397 5398 // configure LEVEL_2/3, dedicated bonding 5399 connection->state = SEND_CREATE_CONNECTION; 5400 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5401 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5402 connection->bonding_flags = BONDING_DEDICATED; 5403 5404 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5405 5406 // handle: connnection failure (connection complete != ok) 5407 // handle: authentication failure 5408 // handle: disconnect on done 5409 5410 hci_run(); 5411 5412 return 0; 5413 } 5414 #endif 5415 5416 void gap_set_local_name(const char * local_name){ 5417 hci_stack->local_name = local_name; 5418 } 5419 5420 5421 #ifdef ENABLE_BLE 5422 5423 #ifdef ENABLE_LE_CENTRAL 5424 void gap_start_scan(void){ 5425 hci_stack->le_scanning_enabled = true; 5426 hci_run(); 5427 } 5428 5429 void gap_stop_scan(void){ 5430 hci_stack->le_scanning_enabled = false; 5431 hci_run(); 5432 } 5433 5434 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5435 hci_stack->le_scan_type = scan_type; 5436 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5437 hci_stack->le_scan_interval = scan_interval; 5438 hci_stack->le_scan_window = scan_window; 5439 hci_stack->le_scanning_param_update = true; 5440 hci_run(); 5441 } 5442 5443 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5444 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5445 } 5446 5447 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5448 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5449 if (!conn){ 5450 // disallow if le connection is already outgoing 5451 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5452 log_error("le connection already active"); 5453 return ERROR_CODE_COMMAND_DISALLOWED; 5454 } 5455 5456 log_info("gap_connect: no connection exists yet, creating context"); 5457 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5458 if (!conn){ 5459 // notify client that alloc failed 5460 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5461 log_info("gap_connect: failed to alloc hci_connection_t"); 5462 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5463 } 5464 5465 // set le connecting state 5466 if (hci_is_le_connection_type(addr_type)){ 5467 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5468 } 5469 5470 conn->state = SEND_CREATE_CONNECTION; 5471 log_info("gap_connect: send create connection next"); 5472 hci_run(); 5473 return ERROR_CODE_SUCCESS; 5474 } 5475 5476 if (!hci_is_le_connection(conn) || 5477 (conn->state == SEND_CREATE_CONNECTION) || 5478 (conn->state == SENT_CREATE_CONNECTION)) { 5479 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5480 log_error("gap_connect: classic connection or connect is already being created"); 5481 return GATT_CLIENT_IN_WRONG_STATE; 5482 } 5483 5484 // check if connection was just disconnected 5485 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5486 log_info("gap_connect: send create connection (again)"); 5487 conn->state = SEND_CREATE_CONNECTION; 5488 hci_run(); 5489 return ERROR_CODE_SUCCESS; 5490 } 5491 5492 log_info("gap_connect: context exists with state %u", conn->state); 5493 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5494 hci_run(); 5495 return ERROR_CODE_SUCCESS; 5496 } 5497 5498 // @assumption: only a single outgoing LE Connection exists 5499 static hci_connection_t * gap_get_outgoing_connection(void){ 5500 btstack_linked_item_t *it; 5501 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5502 hci_connection_t * conn = (hci_connection_t *) it; 5503 if (!hci_is_le_connection(conn)) continue; 5504 switch (conn->state){ 5505 case SEND_CREATE_CONNECTION: 5506 case SENT_CREATE_CONNECTION: 5507 case SENT_CANCEL_CONNECTION: 5508 return conn; 5509 default: 5510 break; 5511 }; 5512 } 5513 return NULL; 5514 } 5515 5516 uint8_t gap_connect_cancel(void){ 5517 hci_connection_t * conn = gap_get_outgoing_connection(); 5518 if (!conn) return 0; 5519 switch (conn->state){ 5520 case SEND_CREATE_CONNECTION: 5521 // skip sending create connection and emit event instead 5522 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5523 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5524 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5525 btstack_memory_hci_connection_free( conn ); 5526 break; 5527 case SENT_CREATE_CONNECTION: 5528 // request to send cancel connection 5529 conn->state = SEND_CANCEL_CONNECTION; 5530 hci_run(); 5531 break; 5532 default: 5533 break; 5534 } 5535 return 0; 5536 } 5537 #endif 5538 5539 #ifdef ENABLE_LE_CENTRAL 5540 /** 5541 * @brief Set connection parameters for outgoing connections 5542 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5543 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5544 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5545 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5546 * @param conn_latency, default: 4 5547 * @param supervision_timeout (unit: 10ms), default: 720 ms 5548 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5549 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5550 */ 5551 5552 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5553 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5554 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5555 hci_stack->le_connection_scan_interval = conn_scan_interval; 5556 hci_stack->le_connection_scan_window = conn_scan_window; 5557 hci_stack->le_connection_interval_min = conn_interval_min; 5558 hci_stack->le_connection_interval_max = conn_interval_max; 5559 hci_stack->le_connection_latency = conn_latency; 5560 hci_stack->le_supervision_timeout = supervision_timeout; 5561 hci_stack->le_minimum_ce_length = min_ce_length; 5562 hci_stack->le_maximum_ce_length = max_ce_length; 5563 } 5564 #endif 5565 5566 /** 5567 * @brief Updates the connection parameters for a given LE connection 5568 * @param handle 5569 * @param conn_interval_min (unit: 1.25ms) 5570 * @param conn_interval_max (unit: 1.25ms) 5571 * @param conn_latency 5572 * @param supervision_timeout (unit: 10ms) 5573 * @returns 0 if ok 5574 */ 5575 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5576 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5577 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5578 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5579 connection->le_conn_interval_min = conn_interval_min; 5580 connection->le_conn_interval_max = conn_interval_max; 5581 connection->le_conn_latency = conn_latency; 5582 connection->le_supervision_timeout = supervision_timeout; 5583 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5584 hci_run(); 5585 return 0; 5586 } 5587 5588 /** 5589 * @brief Request an update of the connection parameter for a given LE connection 5590 * @param handle 5591 * @param conn_interval_min (unit: 1.25ms) 5592 * @param conn_interval_max (unit: 1.25ms) 5593 * @param conn_latency 5594 * @param supervision_timeout (unit: 10ms) 5595 * @returns 0 if ok 5596 */ 5597 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5598 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5599 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5600 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5601 connection->le_conn_interval_min = conn_interval_min; 5602 connection->le_conn_interval_max = conn_interval_max; 5603 connection->le_conn_latency = conn_latency; 5604 connection->le_supervision_timeout = supervision_timeout; 5605 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5606 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5607 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5608 return 0; 5609 } 5610 5611 #ifdef ENABLE_LE_PERIPHERAL 5612 5613 /** 5614 * @brief Set Advertisement Data 5615 * @param advertising_data_length 5616 * @param advertising_data (max 31 octets) 5617 * @note data is not copied, pointer has to stay valid 5618 */ 5619 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5620 hci_stack->le_advertisements_data_len = advertising_data_length; 5621 hci_stack->le_advertisements_data = advertising_data; 5622 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5623 hci_run(); 5624 } 5625 5626 /** 5627 * @brief Set Scan Response Data 5628 * @param advertising_data_length 5629 * @param advertising_data (max 31 octets) 5630 * @note data is not copied, pointer has to stay valid 5631 */ 5632 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5633 hci_stack->le_scan_response_data_len = scan_response_data_length; 5634 hci_stack->le_scan_response_data = scan_response_data; 5635 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5636 hci_run(); 5637 } 5638 5639 /** 5640 * @brief Set Advertisement Parameters 5641 * @param adv_int_min 5642 * @param adv_int_max 5643 * @param adv_type 5644 * @param direct_address_type 5645 * @param direct_address 5646 * @param channel_map 5647 * @param filter_policy 5648 * 5649 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5650 */ 5651 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5652 uint8_t direct_address_typ, bd_addr_t direct_address, 5653 uint8_t channel_map, uint8_t filter_policy) { 5654 5655 hci_stack->le_advertisements_interval_min = adv_int_min; 5656 hci_stack->le_advertisements_interval_max = adv_int_max; 5657 hci_stack->le_advertisements_type = adv_type; 5658 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5659 hci_stack->le_advertisements_channel_map = channel_map; 5660 hci_stack->le_advertisements_filter_policy = filter_policy; 5661 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5662 6); 5663 5664 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5665 hci_run(); 5666 } 5667 5668 /** 5669 * @brief Enable/Disable Advertisements 5670 * @param enabled 5671 */ 5672 void gap_advertisements_enable(int enabled){ 5673 hci_stack->le_advertisements_enabled = enabled != 0; 5674 hci_update_advertisements_enabled_for_current_roles(); 5675 hci_run(); 5676 } 5677 5678 #endif 5679 5680 void hci_le_set_own_address_type(uint8_t own_address_type){ 5681 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5682 if (own_address_type == hci_stack->le_own_addr_type) return; 5683 hci_stack->le_own_addr_type = own_address_type; 5684 5685 #ifdef ENABLE_LE_PERIPHERAL 5686 // update advertisement parameters, too 5687 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5688 hci_run(); 5689 #endif 5690 #ifdef ENABLE_LE_CENTRAL 5691 // note: we don't update scan parameters or modify ongoing connection attempts 5692 #endif 5693 } 5694 5695 #endif 5696 5697 uint8_t gap_disconnect(hci_con_handle_t handle){ 5698 hci_connection_t * conn = hci_connection_for_handle(handle); 5699 if (!conn){ 5700 hci_emit_disconnection_complete(handle, 0); 5701 return 0; 5702 } 5703 // ignore if already disconnected 5704 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5705 return 0; 5706 } 5707 conn->state = SEND_DISCONNECT; 5708 hci_run(); 5709 return 0; 5710 } 5711 5712 int gap_read_rssi(hci_con_handle_t con_handle){ 5713 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5714 if (hci_connection == NULL) return 0; 5715 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5716 hci_run(); 5717 return 1; 5718 } 5719 5720 /** 5721 * @brief Get connection type 5722 * @param con_handle 5723 * @result connection_type 5724 */ 5725 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5726 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5727 if (!conn) return GAP_CONNECTION_INVALID; 5728 switch (conn->address_type){ 5729 case BD_ADDR_TYPE_LE_PUBLIC: 5730 case BD_ADDR_TYPE_LE_RANDOM: 5731 return GAP_CONNECTION_LE; 5732 case BD_ADDR_TYPE_SCO: 5733 return GAP_CONNECTION_SCO; 5734 case BD_ADDR_TYPE_ACL: 5735 return GAP_CONNECTION_ACL; 5736 default: 5737 return GAP_CONNECTION_INVALID; 5738 } 5739 } 5740 5741 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5742 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5743 if (!conn) return HCI_ROLE_INVALID; 5744 return (hci_role_t) conn->role; 5745 } 5746 5747 5748 #ifdef ENABLE_CLASSIC 5749 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5750 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5751 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5752 conn->request_role = role; 5753 hci_run(); 5754 return ERROR_CODE_SUCCESS; 5755 } 5756 #endif 5757 5758 #ifdef ENABLE_BLE 5759 5760 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){ 5761 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5762 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5763 5764 conn->le_phy_update_all_phys = all_phys; 5765 conn->le_phy_update_tx_phys = tx_phys; 5766 conn->le_phy_update_rx_phys = rx_phys; 5767 conn->le_phy_update_phy_options = phy_options; 5768 5769 hci_run(); 5770 5771 return 0; 5772 } 5773 5774 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5775 // check if already in list 5776 btstack_linked_list_iterator_t it; 5777 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5778 while (btstack_linked_list_iterator_has_next(&it)) { 5779 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5780 if (entry->address_type != address_type) { 5781 continue; 5782 } 5783 if (memcmp(entry->address, address, 6) != 0) { 5784 continue; 5785 } 5786 // disallow if already scheduled to add 5787 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5788 return ERROR_CODE_COMMAND_DISALLOWED; 5789 } 5790 // still on controller, but scheduled to remove -> re-add 5791 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5792 return ERROR_CODE_SUCCESS; 5793 } 5794 // alloc and add to list 5795 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5796 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5797 entry->address_type = address_type; 5798 (void)memcpy(entry->address, address, 6); 5799 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5800 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5801 return ERROR_CODE_SUCCESS; 5802 } 5803 5804 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5805 btstack_linked_list_iterator_t it; 5806 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5807 while (btstack_linked_list_iterator_has_next(&it)){ 5808 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5809 if (entry->address_type != address_type) { 5810 continue; 5811 } 5812 if (memcmp(entry->address, address, 6) != 0) { 5813 continue; 5814 } 5815 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5816 // remove from controller if already present 5817 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5818 } else { 5819 // directly remove entry from whitelist 5820 btstack_linked_list_iterator_remove(&it); 5821 btstack_memory_whitelist_entry_free(entry); 5822 } 5823 return ERROR_CODE_SUCCESS; 5824 } 5825 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5826 } 5827 5828 static void hci_whitelist_clear(void){ 5829 btstack_linked_list_iterator_t it; 5830 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5831 while (btstack_linked_list_iterator_has_next(&it)){ 5832 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5833 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5834 // remove from controller if already present 5835 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5836 continue; 5837 } 5838 // directly remove entry from whitelist 5839 btstack_linked_list_iterator_remove(&it); 5840 btstack_memory_whitelist_entry_free(entry); 5841 } 5842 } 5843 5844 /** 5845 * @brief Clear Whitelist 5846 * @returns 0 if ok 5847 */ 5848 uint8_t gap_whitelist_clear(void){ 5849 hci_whitelist_clear(); 5850 hci_run(); 5851 return ERROR_CODE_SUCCESS; 5852 } 5853 5854 /** 5855 * @brief Add Device to Whitelist 5856 * @param address_typ 5857 * @param address 5858 * @returns 0 if ok 5859 */ 5860 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5861 uint8_t status = hci_whitelist_add(address_type, address); 5862 if (status){ 5863 return status; 5864 } 5865 hci_run(); 5866 return ERROR_CODE_SUCCESS; 5867 } 5868 5869 /** 5870 * @brief Remove Device from Whitelist 5871 * @param address_typ 5872 * @param address 5873 * @returns 0 if ok 5874 */ 5875 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5876 uint8_t status = hci_whitelist_remove(address_type, address); 5877 if (status){ 5878 return status; 5879 } 5880 hci_run(); 5881 return ERROR_CODE_SUCCESS; 5882 } 5883 5884 #ifdef ENABLE_LE_CENTRAL 5885 /** 5886 * @brief Connect with Whitelist 5887 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 5888 * @returns - if ok 5889 */ 5890 uint8_t gap_connect_with_whitelist(void){ 5891 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5892 return ERROR_CODE_COMMAND_DISALLOWED; 5893 } 5894 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5895 hci_run(); 5896 return ERROR_CODE_SUCCESS; 5897 } 5898 5899 /** 5900 * @brief Auto Connection Establishment - Start Connecting to device 5901 * @param address_typ 5902 * @param address 5903 * @returns 0 if ok 5904 */ 5905 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 5906 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5907 return ERROR_CODE_COMMAND_DISALLOWED; 5908 } 5909 5910 uint8_t status = hci_whitelist_add(address_type, address); 5911 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 5912 return status; 5913 } 5914 5915 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5916 5917 hci_run(); 5918 return ERROR_CODE_SUCCESS; 5919 } 5920 5921 /** 5922 * @brief Auto Connection Establishment - Stop Connecting to device 5923 * @param address_typ 5924 * @param address 5925 * @returns 0 if ok 5926 */ 5927 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 5928 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5929 return ERROR_CODE_COMMAND_DISALLOWED; 5930 } 5931 5932 hci_whitelist_remove(address_type, address); 5933 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 5934 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5935 } 5936 hci_run(); 5937 return 0; 5938 } 5939 5940 /** 5941 * @brief Auto Connection Establishment - Stop everything 5942 * @note Convenience function to stop all active auto connection attempts 5943 */ 5944 uint8_t gap_auto_connection_stop_all(void){ 5945 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 5946 return ERROR_CODE_COMMAND_DISALLOWED; 5947 } 5948 hci_whitelist_clear(); 5949 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5950 hci_run(); 5951 return ERROR_CODE_SUCCESS; 5952 } 5953 5954 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5955 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5956 if (!conn) return 0; 5957 return conn->le_connection_interval; 5958 } 5959 #endif 5960 #endif 5961 5962 #ifdef ENABLE_CLASSIC 5963 /** 5964 * @brief Set Extended Inquiry Response data 5965 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5966 * @note has to be done before stack starts up 5967 */ 5968 void gap_set_extended_inquiry_response(const uint8_t * data){ 5969 hci_stack->eir_data = data; 5970 } 5971 5972 /** 5973 * @brief Start GAP Classic Inquiry 5974 * @param duration in 1.28s units 5975 * @return 0 if ok 5976 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5977 */ 5978 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5979 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5980 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5981 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5982 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5983 } 5984 hci_stack->inquiry_state = duration_in_1280ms_units; 5985 hci_run(); 5986 return 0; 5987 } 5988 5989 /** 5990 * @brief Stop GAP Classic Inquiry 5991 * @returns 0 if ok 5992 */ 5993 int gap_inquiry_stop(void){ 5994 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5995 // emit inquiry complete event, before it even started 5996 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5997 hci_emit_event(event, sizeof(event), 1); 5998 return 0; 5999 } 6000 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6001 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6002 hci_run(); 6003 return 0; 6004 } 6005 6006 void gap_inquiry_set_lap(uint32_t lap){ 6007 hci_stack->inquiry_lap = lap; 6008 } 6009 6010 6011 /** 6012 * @brief Remote Name Request 6013 * @param addr 6014 * @param page_scan_repetition_mode 6015 * @param clock_offset only used when bit 15 is set 6016 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6017 */ 6018 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6019 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6020 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6021 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6022 hci_stack->remote_name_clock_offset = clock_offset; 6023 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6024 hci_run(); 6025 return 0; 6026 } 6027 6028 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6029 hci_stack->gap_pairing_state = state; 6030 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6031 hci_run(); 6032 return 0; 6033 } 6034 6035 /** 6036 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6037 * @param addr 6038 * @param pin_data 6039 * @param pin_len 6040 * @return 0 if ok 6041 */ 6042 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6043 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6044 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6045 hci_stack->gap_pairing_pin_len = pin_len; 6046 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6047 } 6048 6049 /** 6050 * @brief Legacy Pairing Pin Code Response 6051 * @param addr 6052 * @param pin 6053 * @return 0 if ok 6054 */ 6055 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6056 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6057 } 6058 6059 /** 6060 * @brief Abort Legacy Pairing 6061 * @param addr 6062 * @param pin 6063 * @return 0 if ok 6064 */ 6065 int gap_pin_code_negative(bd_addr_t addr){ 6066 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6067 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6068 } 6069 6070 /** 6071 * @brief SSP Passkey Response 6072 * @param addr 6073 * @param passkey 6074 * @return 0 if ok 6075 */ 6076 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6077 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6078 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6079 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6080 } 6081 6082 /** 6083 * @brief Abort SSP Passkey Entry/Pairing 6084 * @param addr 6085 * @param pin 6086 * @return 0 if ok 6087 */ 6088 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6089 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6090 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6091 } 6092 6093 /** 6094 * @brief Accept SSP Numeric Comparison 6095 * @param addr 6096 * @param passkey 6097 * @return 0 if ok 6098 */ 6099 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6100 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6101 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6102 } 6103 6104 /** 6105 * @brief Abort SSP Numeric Comparison/Pairing 6106 * @param addr 6107 * @param pin 6108 * @return 0 if ok 6109 */ 6110 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6111 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6112 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6113 } 6114 6115 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6116 6117 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6118 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6119 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6120 connectionSetAuthenticationFlags(conn, flag); 6121 hci_run(); 6122 return ERROR_CODE_SUCCESS; 6123 } 6124 6125 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6126 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_REPLY); 6127 } 6128 6129 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6130 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6131 } 6132 #endif 6133 6134 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6135 /** 6136 * @brief Report Remote OOB Data 6137 * @param bd_addr 6138 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6139 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6140 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6141 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6142 */ 6143 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){ 6144 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6145 if (connection == NULL) { 6146 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6147 } 6148 connection->classic_oob_c_192 = c_192; 6149 connection->classic_oob_r_192 = r_192; 6150 connection->classic_oob_c_256 = c_256; 6151 connection->classic_oob_r_256 = r_256; 6152 return ERROR_CODE_SUCCESS; 6153 } 6154 /** 6155 * @brief Generate new OOB data 6156 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6157 */ 6158 void gap_ssp_generate_oob_data(void){ 6159 hci_stack->classic_read_local_oob_data = true; 6160 hci_run(); 6161 } 6162 6163 #endif 6164 6165 /** 6166 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6167 * @param inquiry_mode see bluetooth_defines.h 6168 */ 6169 void hci_set_inquiry_mode(inquiry_mode_t mode){ 6170 hci_stack->inquiry_mode = mode; 6171 } 6172 6173 /** 6174 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6175 */ 6176 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6177 hci_stack->sco_voice_setting = voice_setting; 6178 } 6179 6180 /** 6181 * @brief Get SCO Voice Setting 6182 * @return current voice setting 6183 */ 6184 uint16_t hci_get_sco_voice_setting(void){ 6185 return hci_stack->sco_voice_setting; 6186 } 6187 6188 static int hci_have_usb_transport(void){ 6189 if (!hci_stack->hci_transport) return 0; 6190 const char * transport_name = hci_stack->hci_transport->name; 6191 if (!transport_name) return 0; 6192 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6193 } 6194 6195 /** @brief Get SCO packet length for current SCO Voice setting 6196 * @note Using SCO packets of the exact length is required for USB transfer 6197 * @return Length of SCO packets in bytes (not audio frames) 6198 */ 6199 int hci_get_sco_packet_length(void){ 6200 int sco_packet_length = 0; 6201 6202 #ifdef ENABLE_SCO_OVER_HCI 6203 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6204 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6205 6206 if (hci_have_usb_transport()){ 6207 // see Core Spec for H2 USB Transfer. 6208 // 3 byte SCO header + 24 bytes per connection 6209 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6210 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6211 } else { 6212 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6213 sco_packet_length = 3 + 60 * multiplier; 6214 // assert that it still fits inside an SCO buffer 6215 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6216 sco_packet_length = 3 + 60; 6217 } 6218 } 6219 #endif 6220 6221 #ifdef HAVE_SCO_TRANSPORT 6222 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6223 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6224 sco_packet_length = 3 + 60 * multiplier; 6225 #endif 6226 return sco_packet_length; 6227 } 6228 6229 /** 6230 * @brief Sets the master/slave policy 6231 * @param policy (0: attempt to become master, 1: let connecting device decide) 6232 */ 6233 void hci_set_master_slave_policy(uint8_t policy){ 6234 hci_stack->master_slave_policy = policy; 6235 } 6236 6237 #endif 6238 6239 HCI_STATE hci_get_state(void){ 6240 return hci_stack->state; 6241 } 6242 6243 #ifdef ENABLE_CLASSIC 6244 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6245 hci_stack->gap_classic_accept_callback = accept_callback; 6246 } 6247 #endif 6248 6249 /** 6250 * @brief Set callback for Bluetooth Hardware Error 6251 */ 6252 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6253 hci_stack->hardware_error_callback = fn; 6254 } 6255 6256 void hci_disconnect_all(void){ 6257 btstack_linked_list_iterator_t it; 6258 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6259 while (btstack_linked_list_iterator_has_next(&it)){ 6260 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6261 if (con->state == SENT_DISCONNECT) continue; 6262 con->state = SEND_DISCONNECT; 6263 } 6264 hci_run(); 6265 } 6266 6267 uint16_t hci_get_manufacturer(void){ 6268 return hci_stack->manufacturer; 6269 } 6270 6271 #ifdef ENABLE_BLE 6272 6273 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6274 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6275 if (!hci_con) return NULL; 6276 return &hci_con->sm_connection; 6277 } 6278 6279 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6280 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6281 6282 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6283 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6284 if (hci_connection == NULL) return 0; 6285 if (hci_is_le_connection(hci_connection)){ 6286 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6287 if (sm_conn->sm_connection_encrypted) { 6288 return sm_conn->sm_actual_encryption_key_size; 6289 } 6290 } 6291 #ifdef ENABLE_CLASSIC 6292 else { 6293 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 6294 return hci_connection->encryption_key_size; 6295 } 6296 } 6297 #endif 6298 return 0; 6299 } 6300 6301 int gap_authenticated(hci_con_handle_t con_handle){ 6302 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6303 if (hci_connection == NULL) return 0; 6304 6305 switch (hci_connection->address_type){ 6306 case BD_ADDR_TYPE_LE_PUBLIC: 6307 case BD_ADDR_TYPE_LE_RANDOM: 6308 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6309 return hci_connection->sm_connection.sm_connection_authenticated; 6310 #ifdef ENABLE_CLASSIC 6311 case BD_ADDR_TYPE_SCO: 6312 case BD_ADDR_TYPE_ACL: 6313 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6314 #endif 6315 default: 6316 return 0; 6317 } 6318 } 6319 6320 int gap_secure_connection(hci_con_handle_t con_handle){ 6321 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6322 if (hci_connection == NULL) return 0; 6323 6324 switch (hci_connection->address_type){ 6325 case BD_ADDR_TYPE_LE_PUBLIC: 6326 case BD_ADDR_TYPE_LE_RANDOM: 6327 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6328 return hci_connection->sm_connection.sm_connection_sc; 6329 #ifdef ENABLE_CLASSIC 6330 case BD_ADDR_TYPE_SCO: 6331 case BD_ADDR_TYPE_ACL: 6332 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6333 #endif 6334 default: 6335 return 0; 6336 } 6337 } 6338 6339 bool gap_bonded(hci_con_handle_t con_handle){ 6340 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6341 if (hci_connection == NULL) return 0; 6342 6343 #ifdef ENABLE_CLASSIC 6344 link_key_t link_key; 6345 link_key_type_t link_key_type; 6346 #endif 6347 switch (hci_connection->address_type){ 6348 case BD_ADDR_TYPE_LE_PUBLIC: 6349 case BD_ADDR_TYPE_LE_RANDOM: 6350 return hci_connection->sm_connection.sm_le_db_index >= 0; 6351 #ifdef ENABLE_CLASSIC 6352 case BD_ADDR_TYPE_SCO: 6353 case BD_ADDR_TYPE_ACL: 6354 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6355 #endif 6356 default: 6357 return false; 6358 } 6359 } 6360 6361 6362 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6363 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6364 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6365 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6366 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6367 return sm_conn->sm_connection_authorization_state; 6368 } 6369 #endif 6370 6371 #ifdef ENABLE_CLASSIC 6372 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){ 6373 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6374 if (!conn) return GAP_CONNECTION_INVALID; 6375 conn->sniff_min_interval = sniff_min_interval; 6376 conn->sniff_max_interval = sniff_max_interval; 6377 conn->sniff_attempt = sniff_attempt; 6378 conn->sniff_timeout = sniff_timeout; 6379 hci_run(); 6380 return 0; 6381 } 6382 6383 /** 6384 * @brief Exit Sniff mode 6385 * @param con_handle 6386 @ @return 0 if ok 6387 */ 6388 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6389 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6390 if (!conn) return GAP_CONNECTION_INVALID; 6391 conn->sniff_min_interval = 0xffff; 6392 hci_run(); 6393 return 0; 6394 } 6395 6396 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){ 6397 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6398 if (!conn) return GAP_CONNECTION_INVALID; 6399 conn->sniff_subrating_max_latency = max_latency; 6400 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6401 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6402 hci_run(); 6403 return ERROR_CODE_SUCCESS; 6404 } 6405 6406 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){ 6407 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6408 if (!conn) return GAP_CONNECTION_INVALID; 6409 conn->qos_service_type = service_type; 6410 conn->qos_token_rate = token_rate; 6411 conn->qos_peak_bandwidth = peak_bandwidth; 6412 conn->qos_latency = latency; 6413 conn->qos_delay_variation = delay_variation; 6414 hci_run(); 6415 return ERROR_CODE_SUCCESS; 6416 } 6417 6418 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6419 hci_stack->new_page_scan_interval = page_scan_interval; 6420 hci_stack->new_page_scan_window = page_scan_window; 6421 hci_run(); 6422 } 6423 6424 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6425 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6426 hci_run(); 6427 } 6428 6429 #endif 6430 6431 void hci_halting_defer(void){ 6432 if (hci_stack->state != HCI_STATE_HALTING) return; 6433 switch (hci_stack->substate){ 6434 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6435 case HCI_HALTING_CLOSE: 6436 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6437 break; 6438 default: 6439 break; 6440 } 6441 } 6442 6443 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6444 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6445 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6446 if (le_device_db_index >= le_device_db_max_count()) return; 6447 uint8_t offset = le_device_db_index >> 3; 6448 uint8_t mask = 1 << (le_device_db_index & 7); 6449 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6450 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6451 // note: go back to remove entries, otherwise, a remove + add will skip the add 6452 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6453 } 6454 } 6455 6456 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6457 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6458 if (le_device_db_index >= le_device_db_max_count()) return; 6459 uint8_t offset = le_device_db_index >> 3; 6460 uint8_t mask = 1 << (le_device_db_index & 7); 6461 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6462 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6463 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6464 } 6465 } 6466 6467 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6468 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6469 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6470 } 6471 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6472 // restart le resolving list update 6473 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6474 } 6475 return ERROR_CODE_SUCCESS; 6476 } 6477 #endif 6478 6479 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6480 void hci_setup_test_connections_fuzz(void){ 6481 hci_connection_t * conn; 6482 6483 // default address: 66:55:44:33:00:01 6484 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6485 6486 // setup Controller info 6487 hci_stack->num_cmd_packets = 255; 6488 hci_stack->acl_packets_total_num = 255; 6489 6490 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6491 addr[5] = 0x01; 6492 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6493 conn->con_handle = addr[5]; 6494 conn->role = HCI_ROLE_SLAVE; 6495 conn->state = RECEIVED_CONNECTION_REQUEST; 6496 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6497 6498 // setup incoming Classic SCO connection with con handle 0x0002 6499 addr[5] = 0x02; 6500 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6501 conn->con_handle = addr[5]; 6502 conn->role = HCI_ROLE_SLAVE; 6503 conn->state = RECEIVED_CONNECTION_REQUEST; 6504 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6505 6506 // setup ready Classic ACL connection with con handle 0x0003 6507 addr[5] = 0x03; 6508 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6509 conn->con_handle = addr[5]; 6510 conn->role = HCI_ROLE_SLAVE; 6511 conn->state = OPEN; 6512 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6513 6514 // setup ready Classic SCO connection with con handle 0x0004 6515 addr[5] = 0x04; 6516 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6517 conn->con_handle = addr[5]; 6518 conn->role = HCI_ROLE_SLAVE; 6519 conn->state = OPEN; 6520 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6521 6522 // setup ready LE ACL connection with con handle 0x005 and public address 6523 addr[5] = 0x05; 6524 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6525 conn->con_handle = addr[5]; 6526 conn->role = HCI_ROLE_SLAVE; 6527 conn->state = OPEN; 6528 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6529 conn->sm_connection.sm_connection_encrypted = 1; 6530 } 6531 6532 void hci_free_connections_fuzz(void){ 6533 btstack_linked_list_iterator_t it; 6534 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6535 while (btstack_linked_list_iterator_has_next(&it)){ 6536 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6537 btstack_linked_list_iterator_remove(&it); 6538 btstack_memory_hci_connection_free(con); 6539 } 6540 } 6541 void hci_simulate_working_fuzz(void){ 6542 hci_init_done(); 6543 hci_stack->num_cmd_packets = 255; 6544 } 6545 #endif 6546