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 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 217 btstack_run_loop_set_timer_context(&conn->timeout, conn); 218 hci_connection_timestamp(conn); 219 #endif 220 conn->acl_recombination_length = 0; 221 conn->acl_recombination_pos = 0; 222 conn->num_packets_sent = 0; 223 224 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 225 #ifdef ENABLE_BLE 226 conn->le_phy_update_all_phys = 0xff; 227 #endif 228 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 229 conn->le_max_tx_octets = 27; 230 #endif 231 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 232 return conn; 233 } 234 235 236 /** 237 * get le connection parameter range 238 * 239 * @return le connection parameter range struct 240 */ 241 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 242 *range = hci_stack->le_connection_parameter_range; 243 } 244 245 /** 246 * set le connection parameter range 247 * 248 */ 249 250 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 251 hci_stack->le_connection_parameter_range = *range; 252 } 253 254 /** 255 * @brief Test if connection parameters are inside in existing rage 256 * @param conn_interval_min (unit: 1.25ms) 257 * @param conn_interval_max (unit: 1.25ms) 258 * @param conn_latency 259 * @param supervision_timeout (unit: 10ms) 260 * @returns 1 if included 261 */ 262 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){ 263 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 264 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 265 266 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 267 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 268 269 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 270 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 271 272 return 1; 273 } 274 275 /** 276 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 277 * @note: default: 1 278 * @param max_peripheral_connections 279 */ 280 #ifdef ENABLE_LE_PERIPHERAL 281 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 282 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 283 } 284 #endif 285 286 /** 287 * get hci connections iterator 288 * 289 * @return hci connections iterator 290 */ 291 292 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 293 btstack_linked_list_iterator_init(it, &hci_stack->connections); 294 } 295 296 /** 297 * get connection for a given handle 298 * 299 * @return connection OR NULL, if not found 300 */ 301 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 302 btstack_linked_list_iterator_t it; 303 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 304 while (btstack_linked_list_iterator_has_next(&it)){ 305 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 306 if ( item->con_handle == con_handle ) { 307 return item; 308 } 309 } 310 return NULL; 311 } 312 313 /** 314 * get connection for given address 315 * 316 * @return connection OR NULL, if not found 317 */ 318 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 319 btstack_linked_list_iterator_t it; 320 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 321 while (btstack_linked_list_iterator_has_next(&it)){ 322 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 323 if (connection->address_type != addr_type) continue; 324 if (memcmp(addr, connection->address, 6) != 0) continue; 325 return connection; 326 } 327 return NULL; 328 } 329 330 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 331 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 332 } 333 334 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 335 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 336 } 337 338 #ifdef ENABLE_CLASSIC 339 340 #ifdef ENABLE_SCO_OVER_HCI 341 static int hci_number_sco_connections(void){ 342 int connections = 0; 343 btstack_linked_list_iterator_t it; 344 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 345 while (btstack_linked_list_iterator_has_next(&it)){ 346 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 347 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 348 connections++; 349 } 350 return connections; 351 } 352 #endif 353 354 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 355 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 356 #ifdef HAVE_EMBEDDED_TICK 357 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 358 // connections might be timed out 359 hci_emit_l2cap_check_timeout(connection); 360 } 361 #else 362 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 363 // connections might be timed out 364 hci_emit_l2cap_check_timeout(connection); 365 } 366 #endif 367 } 368 369 static void hci_connection_timestamp(hci_connection_t *connection){ 370 #ifdef HAVE_EMBEDDED_TICK 371 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 372 #else 373 connection->timestamp = btstack_run_loop_get_time_ms(); 374 #endif 375 } 376 377 /** 378 * add authentication flags and reset timer 379 * @note: assumes classic connection 380 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 381 */ 382 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 383 bd_addr_t addr; 384 reverse_bd_addr(bd_addr, addr); 385 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 386 if (conn) { 387 connectionSetAuthenticationFlags(conn, flags); 388 hci_connection_timestamp(conn); 389 } 390 } 391 392 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 393 hci_connection_t * conn = hci_connection_for_handle(handle); 394 if (!conn) return 0; 395 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 396 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 397 return 0; 398 } 399 400 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 401 if (!hci_stack->link_key_db) return; 402 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 403 hci_stack->link_key_db->delete_link_key(addr); 404 } 405 406 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 407 if (!hci_stack->link_key_db) return; 408 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 409 hci_stack->link_key_db->put_link_key(addr, link_key, type); 410 } 411 412 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 413 if (!hci_stack->link_key_db) return false; 414 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 415 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 416 return result; 417 } 418 419 void gap_delete_all_link_keys(void){ 420 bd_addr_t addr; 421 link_key_t link_key; 422 link_key_type_t type; 423 btstack_link_key_iterator_t it; 424 int ok = gap_link_key_iterator_init(&it); 425 if (!ok) { 426 log_error("could not initialize iterator"); 427 return; 428 } 429 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 430 gap_drop_link_key_for_bd_addr(addr); 431 } 432 gap_link_key_iterator_done(&it); 433 } 434 435 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 436 if (!hci_stack->link_key_db) return 0; 437 if (!hci_stack->link_key_db->iterator_init) return 0; 438 return hci_stack->link_key_db->iterator_init(it); 439 } 440 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){ 441 if (!hci_stack->link_key_db) return 0; 442 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 443 } 444 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 445 if (!hci_stack->link_key_db) return; 446 hci_stack->link_key_db->iterator_done(it); 447 } 448 #endif 449 450 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 451 switch (address_type){ 452 case BD_ADDR_TYPE_LE_PUBLIC: 453 case BD_ADDR_TYPE_LE_RANDOM: 454 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 455 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 456 return true; 457 default: 458 return false; 459 } 460 } 461 462 static int hci_is_le_connection(hci_connection_t * connection){ 463 return hci_is_le_connection_type(connection->address_type); 464 } 465 466 /** 467 * count connections 468 */ 469 static int nr_hci_connections(void){ 470 int count = 0; 471 btstack_linked_item_t *it; 472 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 473 count++; 474 } 475 return count; 476 } 477 478 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 479 480 unsigned int num_packets_sent_classic = 0; 481 unsigned int num_packets_sent_le = 0; 482 483 btstack_linked_item_t *it; 484 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 485 hci_connection_t * connection = (hci_connection_t *) it; 486 if (hci_is_le_connection(connection)){ 487 num_packets_sent_le += connection->num_packets_sent; 488 } 489 if (connection->address_type == BD_ADDR_TYPE_ACL){ 490 num_packets_sent_classic += connection->num_packets_sent; 491 } 492 } 493 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 494 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 495 int free_slots_le = 0; 496 497 if (free_slots_classic < 0){ 498 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); 499 return 0; 500 } 501 502 if (hci_stack->le_acl_packets_total_num){ 503 // if we have LE slots, they are used 504 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 505 if (free_slots_le < 0){ 506 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); 507 return 0; 508 } 509 } else { 510 // otherwise, classic slots are used for LE, too 511 free_slots_classic -= num_packets_sent_le; 512 if (free_slots_classic < 0){ 513 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); 514 return 0; 515 } 516 } 517 518 switch (address_type){ 519 case BD_ADDR_TYPE_UNKNOWN: 520 log_error("hci_number_free_acl_slots: unknown address type"); 521 return 0; 522 523 case BD_ADDR_TYPE_ACL: 524 return free_slots_classic; 525 526 default: 527 if (hci_stack->le_acl_packets_total_num){ 528 return free_slots_le; 529 } 530 return free_slots_classic; 531 } 532 } 533 534 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 535 // get connection type 536 hci_connection_t * connection = hci_connection_for_handle(con_handle); 537 if (!connection){ 538 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 539 return 0; 540 } 541 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 542 } 543 544 #ifdef ENABLE_CLASSIC 545 static int hci_number_free_sco_slots(void){ 546 unsigned int num_sco_packets_sent = 0; 547 btstack_linked_item_t *it; 548 if (hci_stack->synchronous_flow_control_enabled){ 549 // explicit flow control 550 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 551 hci_connection_t * connection = (hci_connection_t *) it; 552 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 553 num_sco_packets_sent += connection->num_packets_sent; 554 } 555 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 556 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 557 return 0; 558 } 559 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 560 } else { 561 // implicit flow control -- TODO 562 int num_ready = 0; 563 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 564 hci_connection_t * connection = (hci_connection_t *) it; 565 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 566 if (connection->sco_tx_ready == 0) continue; 567 num_ready++; 568 } 569 return num_ready; 570 } 571 } 572 #endif 573 574 // only used to send HCI Host Number Completed Packets 575 static int hci_can_send_comand_packet_transport(void){ 576 if (hci_stack->hci_packet_buffer_reserved) return 0; 577 578 // check for async hci transport implementations 579 if (hci_stack->hci_transport->can_send_packet_now){ 580 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 581 return 0; 582 } 583 } 584 return 1; 585 } 586 587 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 588 int hci_can_send_command_packet_now(void){ 589 if (hci_can_send_comand_packet_transport() == 0) return 0; 590 return hci_stack->num_cmd_packets > 0u; 591 } 592 593 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 594 // check for async hci transport implementations 595 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 596 return hci_stack->hci_transport->can_send_packet_now(packet_type); 597 } 598 599 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 600 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 601 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 602 } 603 604 int hci_can_send_acl_le_packet_now(void){ 605 if (hci_stack->hci_packet_buffer_reserved) return 0; 606 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 607 } 608 609 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 610 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 611 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 612 } 613 614 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 615 if (hci_stack->hci_packet_buffer_reserved) return 0; 616 return hci_can_send_prepared_acl_packet_now(con_handle); 617 } 618 619 #ifdef ENABLE_CLASSIC 620 int hci_can_send_acl_classic_packet_now(void){ 621 if (hci_stack->hci_packet_buffer_reserved) return 0; 622 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 623 } 624 625 int hci_can_send_prepared_sco_packet_now(void){ 626 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 627 if (hci_have_usb_transport()){ 628 return hci_stack->sco_can_send_now; 629 } else { 630 return hci_number_free_sco_slots() > 0; 631 } 632 } 633 634 int hci_can_send_sco_packet_now(void){ 635 if (hci_stack->hci_packet_buffer_reserved) return 0; 636 return hci_can_send_prepared_sco_packet_now(); 637 } 638 639 void hci_request_sco_can_send_now_event(void){ 640 hci_stack->sco_waiting_for_can_send_now = 1; 641 hci_notify_if_sco_can_send_now(); 642 } 643 #endif 644 645 // used for internal checks in l2cap.c 646 int hci_is_packet_buffer_reserved(void){ 647 return hci_stack->hci_packet_buffer_reserved; 648 } 649 650 // reserves outgoing packet buffer. @returns 1 if successful 651 int hci_reserve_packet_buffer(void){ 652 if (hci_stack->hci_packet_buffer_reserved) { 653 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 654 return 0; 655 } 656 hci_stack->hci_packet_buffer_reserved = 1; 657 return 1; 658 } 659 660 void hci_release_packet_buffer(void){ 661 hci_stack->hci_packet_buffer_reserved = 0; 662 } 663 664 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 665 static int hci_transport_synchronous(void){ 666 return hci_stack->hci_transport->can_send_packet_now == NULL; 667 } 668 669 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 670 671 // 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); 672 673 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 674 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 675 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 676 max_acl_data_packet_length = hci_stack->le_data_packets_length; 677 } 678 679 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 680 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 681 max_acl_data_packet_length = connection->le_max_tx_octets; 682 } 683 #endif 684 685 log_debug("hci_send_acl_packet_fragments entered"); 686 687 int err; 688 // multiple packets could be send on a synchronous HCI transport 689 while (true){ 690 691 log_debug("hci_send_acl_packet_fragments loop entered"); 692 693 // get current data 694 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 695 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 696 bool more_fragments = false; 697 698 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 699 if (current_acl_data_packet_length > max_acl_data_packet_length){ 700 more_fragments = true; 701 current_acl_data_packet_length = max_acl_data_packet_length; 702 } 703 704 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 705 if (acl_header_pos > 0u){ 706 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 707 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 708 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 709 } 710 711 // update header len 712 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 713 714 // count packet 715 connection->num_packets_sent++; 716 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 717 718 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 719 if (more_fragments){ 720 // update start of next fragment to send 721 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 722 } else { 723 // done 724 hci_stack->acl_fragmentation_pos = 0; 725 hci_stack->acl_fragmentation_total_size = 0; 726 } 727 728 // send packet 729 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 730 const int size = current_acl_data_packet_length + 4; 731 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 732 hci_stack->acl_fragmentation_tx_active = 1; 733 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 734 735 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 736 737 // done yet? 738 if (!more_fragments) break; 739 740 // can send more? 741 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 742 } 743 744 log_debug("hci_send_acl_packet_fragments loop over"); 745 746 // release buffer now for synchronous transport 747 if (hci_transport_synchronous()){ 748 hci_stack->acl_fragmentation_tx_active = 0; 749 hci_release_packet_buffer(); 750 hci_emit_transport_packet_sent(); 751 } 752 753 return err; 754 } 755 756 // pre: caller has reserved the packet buffer 757 int hci_send_acl_packet_buffer(int size){ 758 759 // log_info("hci_send_acl_packet_buffer size %u", size); 760 761 if (!hci_stack->hci_packet_buffer_reserved) { 762 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 763 return 0; 764 } 765 766 uint8_t * packet = hci_stack->hci_packet_buffer; 767 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 768 769 // check for free places on Bluetooth module 770 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 771 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 772 hci_release_packet_buffer(); 773 hci_emit_transport_packet_sent(); 774 return BTSTACK_ACL_BUFFERS_FULL; 775 } 776 777 hci_connection_t *connection = hci_connection_for_handle( con_handle); 778 if (!connection) { 779 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 780 hci_release_packet_buffer(); 781 hci_emit_transport_packet_sent(); 782 return 0; 783 } 784 785 #ifdef ENABLE_CLASSIC 786 hci_connection_timestamp(connection); 787 #endif 788 789 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 790 791 // setup data 792 hci_stack->acl_fragmentation_total_size = size; 793 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 794 795 return hci_send_acl_packet_fragments(connection); 796 } 797 798 #ifdef ENABLE_CLASSIC 799 // pre: caller has reserved the packet buffer 800 int hci_send_sco_packet_buffer(int size){ 801 802 // log_info("hci_send_acl_packet_buffer size %u", size); 803 804 if (!hci_stack->hci_packet_buffer_reserved) { 805 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 806 return 0; 807 } 808 809 uint8_t * packet = hci_stack->hci_packet_buffer; 810 811 // skip checks in loopback mode 812 if (!hci_stack->loopback_mode){ 813 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 814 815 // check for free places on Bluetooth module 816 if (!hci_can_send_prepared_sco_packet_now()) { 817 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 818 hci_release_packet_buffer(); 819 hci_emit_transport_packet_sent(); 820 return BTSTACK_ACL_BUFFERS_FULL; 821 } 822 823 // track send packet in connection struct 824 hci_connection_t *connection = hci_connection_for_handle( con_handle); 825 if (!connection) { 826 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 827 hci_release_packet_buffer(); 828 hci_emit_transport_packet_sent(); 829 return 0; 830 } 831 832 if (hci_have_usb_transport()){ 833 // token used 834 hci_stack->sco_can_send_now = 0; 835 } else { 836 if (hci_stack->synchronous_flow_control_enabled){ 837 connection->num_packets_sent++; 838 } else { 839 connection->sco_tx_ready--; 840 } 841 } 842 } 843 844 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 845 846 #ifdef HAVE_SCO_TRANSPORT 847 hci_stack->sco_transport->send_packet(packet, size); 848 hci_release_packet_buffer(); 849 hci_emit_transport_packet_sent(); 850 851 return 0; 852 #else 853 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 854 if (hci_transport_synchronous()){ 855 hci_release_packet_buffer(); 856 hci_emit_transport_packet_sent(); 857 } 858 859 return err; 860 #endif 861 } 862 #endif 863 864 static void acl_handler(uint8_t *packet, uint16_t size){ 865 866 // get info 867 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 868 hci_connection_t *conn = hci_connection_for_handle(con_handle); 869 uint8_t acl_flags = READ_ACL_FLAGS(packet); 870 uint16_t acl_length = READ_ACL_LENGTH(packet); 871 872 // ignore non-registered handle 873 if (!conn){ 874 log_error("acl_handler called with non-registered handle %u!" , con_handle); 875 return; 876 } 877 878 // assert packet is complete 879 if ((acl_length + 4u) != size){ 880 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 881 return; 882 } 883 884 #ifdef ENABLE_CLASSIC 885 // update idle timestamp 886 hci_connection_timestamp(conn); 887 #endif 888 889 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 890 hci_stack->host_completed_packets = 1; 891 conn->num_packets_completed++; 892 #endif 893 894 // handle different packet types 895 switch (acl_flags & 0x03u) { 896 897 case 0x01: // continuation fragment 898 899 // sanity checks 900 if (conn->acl_recombination_pos == 0u) { 901 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 902 return; 903 } 904 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 905 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 906 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 907 conn->acl_recombination_pos = 0; 908 return; 909 } 910 911 // append fragment payload (header already stored) 912 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 913 &packet[4], acl_length); 914 conn->acl_recombination_pos += acl_length; 915 916 // forward complete L2CAP packet if complete. 917 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 918 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 919 // reset recombination buffer 920 conn->acl_recombination_length = 0; 921 conn->acl_recombination_pos = 0; 922 } 923 break; 924 925 case 0x02: { // first fragment 926 927 // sanity check 928 if (conn->acl_recombination_pos) { 929 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 930 conn->acl_recombination_pos = 0; 931 } 932 933 // peek into L2CAP packet! 934 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 935 936 // compare fragment size to L2CAP packet size 937 if (acl_length >= (l2cap_length + 4u)){ 938 // forward fragment as L2CAP packet 939 hci_emit_acl_packet(packet, acl_length + 4u); 940 } else { 941 942 if (acl_length > HCI_ACL_BUFFER_SIZE){ 943 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 944 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 945 return; 946 } 947 948 // store first fragment and tweak acl length for complete package 949 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 950 packet, acl_length + 4u); 951 conn->acl_recombination_pos = acl_length + 4u; 952 conn->acl_recombination_length = l2cap_length; 953 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 954 } 955 break; 956 957 } 958 default: 959 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 960 return; 961 } 962 963 // execute main loop 964 hci_run(); 965 } 966 967 static void hci_shutdown_connection(hci_connection_t *conn){ 968 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 969 970 #ifdef ENABLE_CLASSIC 971 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 972 bd_addr_type_t addr_type = conn->address_type; 973 #endif 974 #ifdef HAVE_SCO_TRANSPORT 975 hci_con_handle_t con_handle = conn->con_handle; 976 #endif 977 #endif 978 979 btstack_run_loop_remove_timer(&conn->timeout); 980 981 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 982 btstack_memory_hci_connection_free( conn ); 983 984 // now it's gone 985 hci_emit_nr_connections_changed(); 986 987 #ifdef ENABLE_CLASSIC 988 #ifdef ENABLE_SCO_OVER_HCI 989 // update SCO 990 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 991 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 992 } 993 #endif 994 #ifdef HAVE_SCO_TRANSPORT 995 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 996 hci_stack->sco_transport->close(con_handle); 997 } 998 #endif 999 #endif 1000 } 1001 1002 #ifdef ENABLE_CLASSIC 1003 1004 static const uint16_t packet_type_sizes[] = { 1005 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1006 HCI_ACL_DH1_SIZE, 0, 0, 0, 1007 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1008 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1009 }; 1010 static const uint8_t packet_type_feature_requirement_bit[] = { 1011 0, // 3 slot packets 1012 1, // 5 slot packets 1013 25, // EDR 2 mpbs 1014 26, // EDR 3 mbps 1015 39, // 3 slot EDR packts 1016 40, // 5 slot EDR packet 1017 }; 1018 static const uint16_t packet_type_feature_packet_mask[] = { 1019 0x0f00, // 3 slot packets 1020 0xf000, // 5 slot packets 1021 0x1102, // EDR 2 mpbs 1022 0x2204, // EDR 3 mbps 1023 0x0300, // 3 slot EDR packts 1024 0x3000, // 5 slot EDR packet 1025 }; 1026 1027 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1028 // enable packet types based on size 1029 uint16_t packet_types = 0; 1030 unsigned int i; 1031 for (i=0;i<16;i++){ 1032 if (packet_type_sizes[i] == 0) continue; 1033 if (packet_type_sizes[i] <= buffer_size){ 1034 packet_types |= 1 << i; 1035 } 1036 } 1037 // disable packet types due to missing local supported features 1038 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1039 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1040 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1041 if (feature_set) continue; 1042 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1043 packet_types &= ~packet_type_feature_packet_mask[i]; 1044 } 1045 // flip bits for "may not be used" 1046 packet_types ^= 0x3306; 1047 return packet_types; 1048 } 1049 1050 uint16_t hci_usable_acl_packet_types(void){ 1051 return hci_stack->packet_types; 1052 } 1053 #endif 1054 1055 uint8_t* hci_get_outgoing_packet_buffer(void){ 1056 // hci packet buffer is >= acl data packet length 1057 return hci_stack->hci_packet_buffer; 1058 } 1059 1060 uint16_t hci_max_acl_data_packet_length(void){ 1061 return hci_stack->acl_data_packet_length; 1062 } 1063 1064 #ifdef ENABLE_CLASSIC 1065 int hci_extended_sco_link_supported(void){ 1066 // No. 31, byte 3, bit 7 1067 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1068 } 1069 #endif 1070 1071 int hci_non_flushable_packet_boundary_flag_supported(void){ 1072 // No. 54, byte 6, bit 6 1073 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1074 } 1075 1076 static int gap_ssp_supported(void){ 1077 // No. 51, byte 6, bit 3 1078 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1079 } 1080 1081 static int hci_classic_supported(void){ 1082 #ifdef ENABLE_CLASSIC 1083 // No. 37, byte 4, bit 5, = No BR/EDR Support 1084 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1085 #else 1086 return 0; 1087 #endif 1088 } 1089 1090 static int hci_le_supported(void){ 1091 #ifdef ENABLE_BLE 1092 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1093 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1094 #else 1095 return 0; 1096 #endif 1097 } 1098 1099 #ifdef ENABLE_BLE 1100 1101 /** 1102 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1103 */ 1104 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1105 *addr_type = hci_stack->le_own_addr_type; 1106 if (hci_stack->le_own_addr_type){ 1107 (void)memcpy(addr, hci_stack->le_random_address, 6); 1108 } else { 1109 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1110 } 1111 } 1112 1113 #ifdef ENABLE_LE_CENTRAL 1114 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1115 1116 int offset = 3; 1117 int num_reports = packet[offset]; 1118 offset += 1; 1119 1120 int i; 1121 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1122 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1123 for (i=0; (i<num_reports) && (offset < size);i++){ 1124 // sanity checks on data_length: 1125 uint8_t data_length = packet[offset + 8]; 1126 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1127 if ((offset + 9u + data_length + 1u) > size) return; 1128 // setup event 1129 uint8_t event_size = 10u + data_length; 1130 int pos = 0; 1131 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1132 event[pos++] = event_size; 1133 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1134 offset += 8; 1135 pos += 8; 1136 event[pos++] = packet[offset + 1 + data_length]; // rssi 1137 event[pos++] = data_length; 1138 offset++; 1139 (void)memcpy(&event[pos], &packet[offset], data_length); 1140 pos += data_length; 1141 offset += data_length + 1u; // rssi 1142 hci_emit_event(event, pos, 1); 1143 } 1144 } 1145 #endif 1146 #endif 1147 1148 #ifdef ENABLE_BLE 1149 #ifdef ENABLE_LE_PERIPHERAL 1150 static void hci_update_advertisements_enabled_for_current_roles(void){ 1151 if (hci_stack->le_advertisements_enabled){ 1152 // get number of active le slave connections 1153 int num_slave_connections = 0; 1154 btstack_linked_list_iterator_t it; 1155 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1156 while (btstack_linked_list_iterator_has_next(&it)){ 1157 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1158 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1159 if (con->state != OPEN) continue; 1160 if (con->role != HCI_ROLE_SLAVE) continue; 1161 if (!hci_is_le_connection(con)) continue; 1162 num_slave_connections++; 1163 } 1164 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1165 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1166 } else { 1167 hci_stack->le_advertisements_enabled_for_current_roles = false; 1168 } 1169 } 1170 #endif 1171 #endif 1172 1173 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1174 1175 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1176 if (!hci_stack->config) return 0; 1177 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1178 // Limit baud rate for Broadcom chipsets to 3 mbps 1179 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1180 baud_rate = 3000000; 1181 } 1182 return baud_rate; 1183 } 1184 1185 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1186 UNUSED(ds); 1187 1188 switch (hci_stack->substate){ 1189 case HCI_INIT_W4_SEND_RESET: 1190 log_info("Resend HCI Reset"); 1191 hci_stack->substate = HCI_INIT_SEND_RESET; 1192 hci_stack->num_cmd_packets = 1; 1193 hci_run(); 1194 break; 1195 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1196 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1197 if (hci_stack->hci_transport->reset_link){ 1198 hci_stack->hci_transport->reset_link(); 1199 } 1200 1201 /* fall through */ 1202 1203 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1204 log_info("Resend HCI Reset - CSR Warm Boot"); 1205 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1206 hci_stack->num_cmd_packets = 1; 1207 hci_run(); 1208 break; 1209 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1210 if (hci_stack->hci_transport->set_baudrate){ 1211 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1212 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1213 hci_stack->hci_transport->set_baudrate(baud_rate); 1214 } 1215 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1216 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1217 if (hci_stack->hci_transport->reset_link){ 1218 log_info("Link Reset"); 1219 hci_stack->hci_transport->reset_link(); 1220 } 1221 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1222 hci_run(); 1223 } 1224 break; 1225 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1226 // otherwise continue 1227 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1228 hci_send_cmd(&hci_read_local_supported_commands); 1229 break; 1230 default: 1231 break; 1232 } 1233 } 1234 #endif 1235 1236 static void hci_initializing_next_state(void){ 1237 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1238 } 1239 1240 // assumption: hci_can_send_command_packet_now() == true 1241 static void hci_initializing_run(void){ 1242 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1243 switch (hci_stack->substate){ 1244 case HCI_INIT_SEND_RESET: 1245 hci_state_reset(); 1246 1247 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1248 // prepare reset if command complete not received in 100ms 1249 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1250 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1251 btstack_run_loop_add_timer(&hci_stack->timeout); 1252 #endif 1253 // send command 1254 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1255 hci_send_cmd(&hci_reset); 1256 break; 1257 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1258 hci_send_cmd(&hci_read_local_version_information); 1259 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1260 break; 1261 case HCI_INIT_SEND_READ_LOCAL_NAME: 1262 hci_send_cmd(&hci_read_local_name); 1263 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1264 break; 1265 1266 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1267 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1268 hci_state_reset(); 1269 // prepare reset if command complete not received in 100ms 1270 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1271 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1272 btstack_run_loop_add_timer(&hci_stack->timeout); 1273 // send command 1274 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1275 hci_send_cmd(&hci_reset); 1276 break; 1277 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1278 hci_state_reset(); 1279 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1280 hci_send_cmd(&hci_reset); 1281 break; 1282 case HCI_INIT_SEND_BAUD_CHANGE: { 1283 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1284 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1285 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1286 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1287 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1288 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1289 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1290 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1291 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1292 btstack_run_loop_add_timer(&hci_stack->timeout); 1293 } 1294 break; 1295 } 1296 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1297 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1298 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1299 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1300 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1301 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1302 break; 1303 } 1304 case HCI_INIT_CUSTOM_INIT: 1305 // Custom initialization 1306 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1307 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1308 bool send_cmd = false; 1309 switch (hci_stack->chipset_result){ 1310 case BTSTACK_CHIPSET_VALID_COMMAND: 1311 send_cmd = true; 1312 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1313 break; 1314 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1315 send_cmd = true; 1316 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1317 log_info("CSR Warm Boot"); 1318 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1319 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1320 btstack_run_loop_add_timer(&hci_stack->timeout); 1321 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1322 && hci_stack->config 1323 && hci_stack->chipset 1324 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1325 && hci_stack->hci_transport->set_baudrate 1326 && hci_transport_uart_get_main_baud_rate()){ 1327 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1328 } else { 1329 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1330 } 1331 break; 1332 default: 1333 break; 1334 } 1335 1336 if (send_cmd){ 1337 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1338 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1339 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1340 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1341 break; 1342 } 1343 log_info("Init script done"); 1344 1345 // Init script download on Broadcom chipsets causes: 1346 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1347 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1348 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1349 1350 // - baud rate to reset, restore UART baud rate if needed 1351 int need_baud_change = hci_stack->config 1352 && hci_stack->chipset 1353 && hci_stack->chipset->set_baudrate_command 1354 && hci_stack->hci_transport->set_baudrate 1355 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1356 if (need_baud_change) { 1357 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1358 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1359 hci_stack->hci_transport->set_baudrate(baud_rate); 1360 } 1361 1362 uint16_t bcm_delay_ms = 300; 1363 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1364 // -> Work around: wait here. 1365 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1366 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1367 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1368 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1369 btstack_run_loop_add_timer(&hci_stack->timeout); 1370 break; 1371 } 1372 } 1373 // otherwise continue 1374 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1375 hci_send_cmd(&hci_read_local_supported_commands); 1376 break; 1377 case HCI_INIT_SET_BD_ADDR: 1378 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1379 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1380 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1381 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1382 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1383 break; 1384 #endif 1385 1386 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1387 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1388 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1389 hci_send_cmd(&hci_read_local_supported_commands); 1390 break; 1391 case HCI_INIT_READ_BD_ADDR: 1392 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1393 hci_send_cmd(&hci_read_bd_addr); 1394 break; 1395 case HCI_INIT_READ_BUFFER_SIZE: 1396 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1397 hci_send_cmd(&hci_read_buffer_size); 1398 break; 1399 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1400 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1401 hci_send_cmd(&hci_read_local_supported_features); 1402 break; 1403 1404 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1405 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1406 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1407 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1408 break; 1409 case HCI_INIT_HOST_BUFFER_SIZE: 1410 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1411 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1412 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1413 break; 1414 #endif 1415 1416 case HCI_INIT_SET_EVENT_MASK: 1417 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1418 if (hci_le_supported()){ 1419 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1420 } else { 1421 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1422 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1423 } 1424 break; 1425 1426 #ifdef ENABLE_CLASSIC 1427 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1428 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1429 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1430 break; 1431 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1432 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1433 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1434 break; 1435 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1436 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1437 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1438 break; 1439 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1440 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1441 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1442 break; 1443 case HCI_INIT_WRITE_LOCAL_NAME: { 1444 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1445 hci_reserve_packet_buffer(); 1446 uint8_t * packet = hci_stack->hci_packet_buffer; 1447 // construct HCI Command and send 1448 uint16_t opcode = hci_write_local_name.opcode; 1449 hci_stack->last_cmd_opcode = opcode; 1450 packet[0] = opcode & 0xff; 1451 packet[1] = opcode >> 8; 1452 packet[2] = DEVICE_NAME_LEN; 1453 memset(&packet[3], 0, DEVICE_NAME_LEN); 1454 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1455 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1456 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1457 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1458 // expand '00:00:00:00:00:00' in name with bd_addr 1459 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1460 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1461 break; 1462 } 1463 case HCI_INIT_WRITE_EIR_DATA: { 1464 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1465 hci_reserve_packet_buffer(); 1466 uint8_t * packet = hci_stack->hci_packet_buffer; 1467 // construct HCI Command in-place and send 1468 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1469 hci_stack->last_cmd_opcode = opcode; 1470 uint16_t offset = 0; 1471 packet[offset++] = opcode & 0xff; 1472 packet[offset++] = opcode >> 8; 1473 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1474 packet[offset++] = 0; // FEC not required 1475 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1476 if (hci_stack->eir_data){ 1477 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1478 ad_context_t context; 1479 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1480 uint8_t data_type = ad_iterator_get_data_type(&context); 1481 uint8_t size = ad_iterator_get_data_len(&context); 1482 const uint8_t *data = ad_iterator_get_data(&context); 1483 // copy item 1484 packet[offset++] = size + 1; 1485 packet[offset++] = data_type; 1486 memcpy(&packet[offset], data, size); 1487 // update name item 1488 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1489 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1490 } 1491 offset += size; 1492 } 1493 } else { 1494 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1495 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1496 packet[offset++] = bytes_to_copy + 1; 1497 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1498 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1499 // expand '00:00:00:00:00:00' in name with bd_addr 1500 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1501 } 1502 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1503 break; 1504 } 1505 case HCI_INIT_WRITE_INQUIRY_MODE: 1506 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1507 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1508 break; 1509 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1510 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1511 hci_stack->secure_connections_active = true; 1512 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1513 break; 1514 case HCI_INIT_WRITE_SCAN_ENABLE: 1515 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1516 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1517 break; 1518 // only sent if ENABLE_SCO_OVER_HCI is defined 1519 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1520 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1521 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1522 break; 1523 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1524 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1525 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1526 break; 1527 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1528 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1529 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1530 #ifdef ENABLE_SCO_OVER_HCI 1531 log_info("BCM: Route SCO data via HCI transport"); 1532 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1533 #endif 1534 #ifdef ENABLE_SCO_OVER_PCM 1535 log_info("BCM: Route SCO data via PCM interface"); 1536 #ifdef ENABLE_BCM_PCM_WBS 1537 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1538 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1539 #else 1540 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1541 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1542 #endif 1543 #endif 1544 break; 1545 #ifdef ENABLE_SCO_OVER_PCM 1546 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1547 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1548 log_info("BCM: Config PCM interface for I2S"); 1549 #ifdef ENABLE_BCM_PCM_WBS 1550 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1551 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1552 #else 1553 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1554 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1555 #endif 1556 break; 1557 #endif 1558 #endif 1559 1560 #ifdef ENABLE_BLE 1561 // LE INIT 1562 case HCI_INIT_LE_READ_BUFFER_SIZE: 1563 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1564 hci_send_cmd(&hci_le_read_buffer_size); 1565 break; 1566 case HCI_INIT_LE_SET_EVENT_MASK: 1567 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1568 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1569 break; 1570 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1571 // LE Supported Host = 1, Simultaneous Host = 0 1572 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1573 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1574 break; 1575 #endif 1576 1577 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1578 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1579 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1580 hci_send_cmd(&hci_le_read_maximum_data_length); 1581 break; 1582 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1583 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1584 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1585 break; 1586 #endif 1587 1588 #ifdef ENABLE_LE_CENTRAL 1589 case HCI_INIT_READ_WHITE_LIST_SIZE: 1590 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1591 hci_send_cmd(&hci_le_read_white_list_size); 1592 break; 1593 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1594 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1595 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); 1596 break; 1597 #endif 1598 default: 1599 return; 1600 } 1601 } 1602 1603 static void hci_init_done(void){ 1604 // done. tell the app 1605 log_info("hci_init_done -> HCI_STATE_WORKING"); 1606 hci_stack->state = HCI_STATE_WORKING; 1607 hci_emit_state(); 1608 hci_run(); 1609 } 1610 1611 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1612 bool command_completed = false; 1613 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1614 uint16_t opcode = little_endian_read_16(packet,3); 1615 if (opcode == hci_stack->last_cmd_opcode){ 1616 command_completed = true; 1617 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1618 } else { 1619 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1620 } 1621 } 1622 1623 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1624 uint8_t status = packet[2]; 1625 uint16_t opcode = little_endian_read_16(packet,4); 1626 if (opcode == hci_stack->last_cmd_opcode){ 1627 if (status){ 1628 command_completed = true; 1629 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1630 } else { 1631 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1632 } 1633 } else { 1634 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1635 } 1636 } 1637 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1638 // Vendor == CSR 1639 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1640 // TODO: track actual command 1641 command_completed = true; 1642 } 1643 1644 // Vendor == Toshiba 1645 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1646 // TODO: track actual command 1647 command_completed = true; 1648 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1649 hci_stack->num_cmd_packets = 1; 1650 } 1651 #endif 1652 1653 return command_completed; 1654 } 1655 1656 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1657 1658 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1659 1660 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1661 1662 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1663 1664 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1665 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1666 // 1667 // HCI Reset 1668 // Timeout 100 ms 1669 // HCI Reset 1670 // Command Complete Reset 1671 // HCI Read Local Version Information 1672 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1673 // hang... 1674 // 1675 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1676 if (!command_completed 1677 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1678 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1679 1680 uint16_t opcode = little_endian_read_16(packet,3); 1681 if (opcode == hci_reset.opcode){ 1682 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1683 return; 1684 } 1685 } 1686 1687 // CSR & H5 1688 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1689 if (!command_completed 1690 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1691 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1692 1693 uint16_t opcode = little_endian_read_16(packet,3); 1694 if (opcode == hci_reset.opcode){ 1695 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1696 return; 1697 } 1698 } 1699 1700 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1701 // fix: Correct substate and behave as command below 1702 if (command_completed){ 1703 switch (hci_stack->substate){ 1704 case HCI_INIT_SEND_RESET: 1705 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1706 break; 1707 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1708 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1709 break; 1710 default: 1711 break; 1712 } 1713 } 1714 1715 #endif 1716 1717 if (!command_completed) return; 1718 1719 bool need_baud_change = false; 1720 bool need_addr_change = false; 1721 1722 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1723 need_baud_change = hci_stack->config 1724 && hci_stack->chipset 1725 && hci_stack->chipset->set_baudrate_command 1726 && hci_stack->hci_transport->set_baudrate 1727 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1728 1729 need_addr_change = hci_stack->custom_bd_addr_set 1730 && hci_stack->chipset 1731 && hci_stack->chipset->set_bd_addr_command; 1732 #endif 1733 1734 switch(hci_stack->substate){ 1735 1736 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1737 case HCI_INIT_SEND_RESET: 1738 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1739 // fix: just correct substate and behave as command below 1740 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1741 btstack_run_loop_remove_timer(&hci_stack->timeout); 1742 break; 1743 case HCI_INIT_W4_SEND_RESET: 1744 btstack_run_loop_remove_timer(&hci_stack->timeout); 1745 break; 1746 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1747 log_info("Received local name, need baud change %d", (int) need_baud_change); 1748 if (need_baud_change){ 1749 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1750 return; 1751 } 1752 // skip baud change 1753 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1754 return; 1755 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1756 // for STLC2500D, baud rate change already happened. 1757 // for others, baud rate gets changed now 1758 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1759 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1760 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1761 hci_stack->hci_transport->set_baudrate(baud_rate); 1762 } 1763 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1764 return; 1765 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1766 btstack_run_loop_remove_timer(&hci_stack->timeout); 1767 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1768 return; 1769 case HCI_INIT_W4_CUSTOM_INIT: 1770 // repeat custom init 1771 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1772 return; 1773 #else 1774 case HCI_INIT_W4_SEND_RESET: 1775 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1776 return ; 1777 #endif 1778 1779 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1780 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1781 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1782 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1783 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1784 return; 1785 } 1786 if (need_addr_change){ 1787 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1788 return; 1789 } 1790 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1791 return; 1792 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1793 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1794 if (need_baud_change){ 1795 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1796 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1797 hci_stack->hci_transport->set_baudrate(baud_rate); 1798 } 1799 if (need_addr_change){ 1800 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1801 return; 1802 } 1803 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1804 return; 1805 case HCI_INIT_W4_SET_BD_ADDR: 1806 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1807 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1808 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1809 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1810 return; 1811 } 1812 // skipping st warm boot 1813 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1814 return; 1815 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1816 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1817 return; 1818 #endif 1819 case HCI_INIT_W4_READ_BD_ADDR: 1820 // only read buffer size if supported 1821 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1822 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1823 return; 1824 } 1825 // skipping read buffer size 1826 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1827 return; 1828 case HCI_INIT_W4_SET_EVENT_MASK: 1829 // skip Classic init commands for LE only chipsets 1830 if (!hci_classic_supported()){ 1831 #ifdef ENABLE_BLE 1832 if (hci_le_supported()){ 1833 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1834 return; 1835 } 1836 #endif 1837 log_error("Neither BR/EDR nor LE supported"); 1838 hci_init_done(); 1839 return; 1840 } 1841 if (!gap_ssp_supported()){ 1842 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1843 return; 1844 } 1845 break; 1846 #ifdef ENABLE_BLE 1847 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1848 // skip write le host if not supported (e.g. on LE only EM9301) 1849 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1850 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1851 return; 1852 1853 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1854 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1855 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1856 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1857 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1858 return; 1859 } 1860 // explicit fall through to reduce repetitions 1861 1862 #ifdef ENABLE_LE_CENTRAL 1863 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1864 #else 1865 hci_init_done(); 1866 #endif 1867 return; 1868 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1869 1870 #endif /* ENABLE_BLE */ 1871 1872 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1873 // skip write secure connections host support if not supported or disabled 1874 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1875 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1876 return; 1877 } 1878 break; 1879 1880 #ifdef ENABLE_SCO_OVER_HCI 1881 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1882 // skip write synchronous flow control if not supported 1883 if (hci_stack->local_supported_commands[0] & 0x04) break; 1884 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1885 1886 /* fall through */ 1887 1888 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1889 // skip write default erroneous data reporting if not supported 1890 if (hci_stack->local_supported_commands[0] & 0x08) break; 1891 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1892 1893 /* fall through */ 1894 1895 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1896 // skip bcm set sco pcm config on non-Broadcom chipsets 1897 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1898 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1899 1900 /* fall through */ 1901 1902 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1903 if (!hci_le_supported()){ 1904 // SKIP LE init for Classic only configuration 1905 hci_init_done(); 1906 return; 1907 } 1908 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1909 break; 1910 1911 #else /* !ENABLE_SCO_OVER_HCI */ 1912 1913 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1914 #ifdef ENABLE_SCO_OVER_PCM 1915 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1916 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1917 return; 1918 } 1919 #endif 1920 /* fall through */ 1921 1922 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1923 #ifdef ENABLE_BLE 1924 if (hci_le_supported()){ 1925 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1926 return; 1927 } 1928 #endif 1929 // SKIP LE init for Classic only configuration 1930 hci_init_done(); 1931 return; 1932 #endif /* ENABLE_SCO_OVER_HCI */ 1933 1934 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1935 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1936 // Response to command before init done state -> init done 1937 case (HCI_INIT_DONE-1): 1938 hci_init_done(); 1939 return; 1940 #endif 1941 1942 default: 1943 break; 1944 } 1945 hci_initializing_next_state(); 1946 } 1947 1948 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1949 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1950 bd_addr_t bd_address; 1951 (void)memcpy(&bd_address, conn->address, 6); 1952 1953 #ifdef ENABLE_CLASSIC 1954 // cache needed data 1955 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1956 #endif 1957 1958 // connection failed, remove entry 1959 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1960 btstack_memory_hci_connection_free( conn ); 1961 1962 #ifdef ENABLE_CLASSIC 1963 // notify client if dedicated bonding 1964 if (notify_dedicated_bonding_failed){ 1965 log_info("hci notify_dedicated_bonding_failed"); 1966 hci_emit_dedicated_bonding_result(bd_address, status); 1967 } 1968 1969 // if authentication error, also delete link key 1970 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1971 gap_drop_link_key_for_bd_addr(bd_address); 1972 } 1973 #else 1974 UNUSED(status); 1975 #endif 1976 } 1977 1978 #ifdef ENABLE_CLASSIC 1979 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1980 // SSP Controller 1981 if (features[6] & (1 << 3)){ 1982 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1983 } 1984 // eSCO 1985 if (features[3] & (1<<7)){ 1986 conn->remote_supported_features[0] |= 1; 1987 } 1988 // Extended features 1989 if (features[7] & (1<<7)){ 1990 conn->remote_supported_features[0] |= 2; 1991 } 1992 } 1993 1994 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1995 // SSP Host 1996 if (features[0] & (1 << 0)){ 1997 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1998 } 1999 // SC Host 2000 if (features[0] & (1 << 3)){ 2001 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2002 } 2003 } 2004 2005 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2006 // SC Controller 2007 if (features[1] & (1 << 0)){ 2008 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2009 } 2010 } 2011 2012 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2013 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2014 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2015 if (conn->bonding_flags & BONDING_DEDICATED){ 2016 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2017 } 2018 } 2019 #endif 2020 2021 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2022 // handle BT initialization 2023 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2024 hci_initializing_event_handler(packet, size); 2025 } 2026 2027 // help with BT sleep 2028 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2029 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2030 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2031 hci_initializing_next_state(); 2032 } 2033 } 2034 2035 #ifdef ENABLE_CLASSIC 2036 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2037 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2038 conn->encryption_key_size = encryption_key_size; 2039 2040 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 2041 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2042 return; 2043 } 2044 2045 // Request Authentication if not already done 2046 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2047 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2048 } 2049 #endif 2050 2051 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2052 UNUSED(size); 2053 2054 uint16_t manufacturer; 2055 #ifdef ENABLE_CLASSIC 2056 hci_con_handle_t handle; 2057 hci_connection_t * conn; 2058 uint8_t status; 2059 #endif 2060 // get num cmd packets - limit to 1 to reduce complexity 2061 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2062 2063 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2064 switch (opcode){ 2065 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2066 if (packet[5]) break; 2067 // terminate, name 248 chars 2068 packet[6+248] = 0; 2069 log_info("local name: %s", &packet[6]); 2070 break; 2071 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2072 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2073 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2074 uint16_t acl_len = little_endian_read_16(packet, 6); 2075 uint16_t sco_len = packet[8]; 2076 2077 // determine usable ACL/SCO payload size 2078 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2079 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2080 2081 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2082 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2083 2084 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2085 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2086 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2087 } 2088 break; 2089 case HCI_OPCODE_HCI_READ_RSSI: 2090 if (packet[5] == ERROR_CODE_SUCCESS){ 2091 uint8_t event[5]; 2092 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2093 event[1] = 3; 2094 (void)memcpy(&event[2], &packet[6], 3); 2095 hci_emit_event(event, sizeof(event), 1); 2096 } 2097 break; 2098 #ifdef ENABLE_BLE 2099 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2100 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2101 hci_stack->le_acl_packets_total_num = packet[8]; 2102 // determine usable ACL payload size 2103 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2104 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2105 } 2106 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2107 break; 2108 #endif 2109 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2110 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2111 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2112 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2113 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); 2114 break; 2115 #endif 2116 #ifdef ENABLE_LE_CENTRAL 2117 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2118 hci_stack->le_whitelist_capacity = packet[6]; 2119 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2120 break; 2121 #endif 2122 case HCI_OPCODE_HCI_READ_BD_ADDR: 2123 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2124 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)); 2125 #ifdef ENABLE_CLASSIC 2126 if (hci_stack->link_key_db){ 2127 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2128 } 2129 #endif 2130 break; 2131 #ifdef ENABLE_CLASSIC 2132 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2133 hci_emit_discoverable_enabled(hci_stack->discoverable); 2134 break; 2135 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2136 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2137 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2138 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2139 hci_emit_event(event, sizeof(event), 1); 2140 } 2141 break; 2142 #endif 2143 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2144 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2145 2146 #ifdef ENABLE_CLASSIC 2147 // determine usable ACL packet types based on host buffer size and supported features 2148 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2149 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2150 #endif 2151 // Classic/LE 2152 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2153 break; 2154 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2155 manufacturer = little_endian_read_16(packet, 10); 2156 // map Cypress to Broadcom 2157 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2158 log_info("Treat Cypress as Broadcom"); 2159 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2160 little_endian_store_16(packet, 10, manufacturer); 2161 } 2162 hci_stack->manufacturer = manufacturer; 2163 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2164 break; 2165 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2166 hci_stack->local_supported_commands[0] = 2167 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2168 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2169 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2170 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2171 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2172 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2173 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2174 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2175 hci_stack->local_supported_commands[1] = 2176 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2177 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2178 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2179 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2180 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2181 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2182 break; 2183 #ifdef ENABLE_CLASSIC 2184 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2185 if (packet[5]) return; 2186 hci_stack->synchronous_flow_control_enabled = 1; 2187 break; 2188 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2189 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2190 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2191 conn = hci_connection_for_handle(handle); 2192 if (conn != NULL) { 2193 uint8_t key_size = 0; 2194 if (status == 0){ 2195 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2196 log_info("Handle %04x key Size: %u", handle, key_size); 2197 } else { 2198 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2199 } 2200 hci_handle_read_encryption_key_size_complete(conn, key_size); 2201 } 2202 break; 2203 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2204 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2205 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2206 uint8_t event[67]; 2207 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2208 event[1] = 65; 2209 (void)memset(&event[2], 0, 65); 2210 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2211 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2212 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2213 event[2] = 3; 2214 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2215 } else { 2216 event[2] = 1; 2217 } 2218 } 2219 hci_emit_event(event, sizeof(event), 0); 2220 break; 2221 } 2222 #endif 2223 #endif 2224 default: 2225 break; 2226 } 2227 } 2228 2229 #ifdef ENABLE_BLE 2230 static void event_handle_le_connection_complete(const uint8_t * packet){ 2231 bd_addr_t addr; 2232 bd_addr_type_t addr_type; 2233 hci_connection_t * conn; 2234 2235 // Connection management 2236 reverse_bd_addr(&packet[8], addr); 2237 addr_type = (bd_addr_type_t)packet[7]; 2238 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2239 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2240 2241 #ifdef ENABLE_LE_CENTRAL 2242 // handle error: error is reported only to the initiator -> outgoing connection 2243 if (packet[3]){ 2244 2245 // handle cancelled outgoing connection 2246 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2247 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2248 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2249 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2250 // whitelist connect 2251 if (hci_is_le_connection_type(addr_type)){ 2252 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2253 } 2254 // get outgoing connection conn struct for direct connect 2255 conn = gap_get_outgoing_connection(); 2256 } 2257 2258 // outgoing le connection establishment is done 2259 if (conn){ 2260 // remove entry 2261 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2262 btstack_memory_hci_connection_free( conn ); 2263 } 2264 return; 2265 } 2266 #endif 2267 2268 // on success, both hosts receive connection complete event 2269 if (packet[6] == HCI_ROLE_MASTER){ 2270 #ifdef ENABLE_LE_CENTRAL 2271 // if we're master on an le connection, it was an outgoing connection and we're done with it 2272 // note: no hci_connection_t object exists yet for connect with whitelist 2273 if (hci_is_le_connection_type(addr_type)){ 2274 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2275 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2276 } 2277 #endif 2278 } else { 2279 #ifdef ENABLE_LE_PERIPHERAL 2280 // if we're slave, it was an incoming connection, advertisements have stopped 2281 hci_stack->le_advertisements_active = false; 2282 #endif 2283 } 2284 2285 // LE connections are auto-accepted, so just create a connection if there isn't one already 2286 if (!conn){ 2287 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2288 } 2289 2290 // no memory, sorry. 2291 if (!conn){ 2292 return; 2293 } 2294 2295 conn->state = OPEN; 2296 conn->role = packet[6]; 2297 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2298 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2299 2300 #ifdef ENABLE_LE_PERIPHERAL 2301 if (packet[6] == HCI_ROLE_SLAVE){ 2302 hci_update_advertisements_enabled_for_current_roles(); 2303 } 2304 #endif 2305 2306 // init unenhanced att bearer mtu 2307 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2308 conn->att_connection.mtu_exchanged = false; 2309 2310 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2311 2312 // restart timer 2313 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2314 // btstack_run_loop_add_timer(&conn->timeout); 2315 2316 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2317 2318 hci_emit_nr_connections_changed(); 2319 } 2320 #endif 2321 2322 static void event_handler(uint8_t *packet, uint16_t size){ 2323 2324 uint16_t event_length = packet[1]; 2325 2326 // assert packet is complete 2327 if (size != (event_length + 2u)){ 2328 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2329 return; 2330 } 2331 2332 bd_addr_type_t addr_type; 2333 hci_con_handle_t handle; 2334 hci_connection_t * conn; 2335 int i; 2336 int create_connection_cmd; 2337 2338 #ifdef ENABLE_CLASSIC 2339 hci_link_type_t link_type; 2340 bd_addr_t addr; 2341 #endif 2342 2343 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2344 2345 switch (hci_event_packet_get_type(packet)) { 2346 2347 case HCI_EVENT_COMMAND_COMPLETE: 2348 handle_command_complete_event(packet, size); 2349 break; 2350 2351 case HCI_EVENT_COMMAND_STATUS: 2352 // get num cmd packets - limit to 1 to reduce complexity 2353 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2354 2355 // check command status to detected failed outgoing connections 2356 create_connection_cmd = 0; 2357 #ifdef ENABLE_CLASSIC 2358 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2359 create_connection_cmd = 1; 2360 } 2361 #endif 2362 #ifdef ENABLE_LE_CENTRAL 2363 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2364 create_connection_cmd = 1; 2365 } 2366 #endif 2367 if (create_connection_cmd) { 2368 uint8_t status = hci_event_command_status_get_status(packet); 2369 addr_type = hci_stack->outgoing_addr_type; 2370 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2371 log_info("command status (create connection), status %x, connection %p, addr %s, type %x", status, conn, bd_addr_to_str(hci_stack->outgoing_addr), addr_type); 2372 2373 // reset outgoing address info 2374 memset(hci_stack->outgoing_addr, 0, 6); 2375 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2376 2377 // on error 2378 if (status != ERROR_CODE_SUCCESS){ 2379 #ifdef ENABLE_LE_CENTRAL 2380 if (hci_is_le_connection_type(addr_type)){ 2381 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2382 } 2383 #endif 2384 // error => outgoing connection failed 2385 if (conn != NULL){ 2386 hci_handle_connection_failed(conn, status); 2387 } 2388 } 2389 } 2390 2391 #ifdef ENABLE_CLASSIC 2392 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2393 uint8_t status = hci_event_command_status_get_status(packet); 2394 log_info("command status (inquiry), status %x", status); 2395 if (status == ERROR_CODE_SUCCESS) { 2396 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2397 } else { 2398 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2399 } 2400 } 2401 #endif 2402 break; 2403 2404 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2405 if (size < 3) return; 2406 uint16_t num_handles = packet[2]; 2407 if (size != (3u + num_handles * 4u)) return; 2408 uint16_t offset = 3; 2409 for (i=0; i<num_handles;i++){ 2410 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2411 offset += 2u; 2412 uint16_t num_packets = little_endian_read_16(packet, offset); 2413 offset += 2u; 2414 2415 conn = hci_connection_for_handle(handle); 2416 if (!conn){ 2417 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2418 continue; 2419 } 2420 2421 if (conn->num_packets_sent >= num_packets){ 2422 conn->num_packets_sent -= num_packets; 2423 } else { 2424 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2425 conn->num_packets_sent = 0; 2426 } 2427 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2428 2429 #ifdef ENABLE_CLASSIC 2430 // For SCO, we do the can_send_now_check here 2431 hci_notify_if_sco_can_send_now(); 2432 #endif 2433 } 2434 break; 2435 } 2436 2437 #ifdef ENABLE_CLASSIC 2438 case HCI_EVENT_INQUIRY_COMPLETE: 2439 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2440 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2441 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2442 hci_emit_event(event, sizeof(event), 1); 2443 } 2444 break; 2445 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2446 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2447 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2448 } 2449 break; 2450 case HCI_EVENT_CONNECTION_REQUEST: 2451 reverse_bd_addr(&packet[2], addr); 2452 link_type = (hci_link_type_t) packet[11]; 2453 if (hci_stack->gap_classic_accept_callback != NULL){ 2454 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2455 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2456 bd_addr_copy(hci_stack->decline_addr, addr); 2457 break; 2458 } 2459 } 2460 2461 // TODO: eval COD 8-10 2462 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2463 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2464 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2465 if (!conn) { 2466 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2467 } 2468 if (!conn) { 2469 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2470 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2471 bd_addr_copy(hci_stack->decline_addr, addr); 2472 break; 2473 } 2474 conn->role = HCI_ROLE_SLAVE; 2475 conn->state = RECEIVED_CONNECTION_REQUEST; 2476 // store info about eSCO 2477 if (link_type == HCI_LINK_TYPE_ESCO){ 2478 conn->remote_supported_features[0] |= 1; 2479 } 2480 hci_run(); 2481 break; 2482 2483 case HCI_EVENT_CONNECTION_COMPLETE: 2484 // Connection management 2485 reverse_bd_addr(&packet[5], addr); 2486 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2487 addr_type = BD_ADDR_TYPE_ACL; 2488 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2489 if (conn) { 2490 if (!packet[2]){ 2491 conn->state = OPEN; 2492 conn->con_handle = little_endian_read_16(packet, 3); 2493 2494 // queue get remote feature 2495 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2496 2497 // queue set supervision timeout if we're master 2498 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2499 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2500 } 2501 2502 // restart timer 2503 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2504 btstack_run_loop_add_timer(&conn->timeout); 2505 2506 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2507 2508 hci_emit_nr_connections_changed(); 2509 } else { 2510 // connection failed 2511 hci_handle_connection_failed(conn, packet[2]); 2512 } 2513 } 2514 break; 2515 2516 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2517 reverse_bd_addr(&packet[5], addr); 2518 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2519 if (packet[2]){ 2520 // connection failed 2521 break; 2522 } 2523 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2524 if (!conn) { 2525 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2526 } 2527 if (!conn) { 2528 break; 2529 } 2530 conn->state = OPEN; 2531 conn->con_handle = little_endian_read_16(packet, 3); 2532 2533 #ifdef ENABLE_SCO_OVER_HCI 2534 // update SCO 2535 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2536 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2537 } 2538 // trigger can send now 2539 if (hci_have_usb_transport()){ 2540 hci_stack->sco_can_send_now = 1; 2541 } 2542 #endif 2543 #ifdef HAVE_SCO_TRANSPORT 2544 // configure sco transport 2545 if (hci_stack->sco_transport != NULL){ 2546 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2547 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2548 } 2549 #endif 2550 break; 2551 2552 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2553 handle = little_endian_read_16(packet, 3); 2554 conn = hci_connection_for_handle(handle); 2555 if (!conn) break; 2556 if (!packet[2]){ 2557 const uint8_t * features = &packet[5]; 2558 hci_handle_remote_features_page_0(conn, features); 2559 2560 // read extended features if possible 2561 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2562 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2563 break; 2564 } 2565 } 2566 hci_handle_remote_features_received(conn); 2567 break; 2568 2569 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2570 handle = little_endian_read_16(packet, 3); 2571 conn = hci_connection_for_handle(handle); 2572 if (!conn) break; 2573 // status = ok, page = 1 2574 if (!packet[2]) { 2575 uint8_t page_number = packet[5]; 2576 uint8_t maximum_page_number = packet[6]; 2577 const uint8_t * features = &packet[7]; 2578 bool done = false; 2579 switch (page_number){ 2580 case 1: 2581 hci_handle_remote_features_page_1(conn, features); 2582 if (maximum_page_number >= 2){ 2583 // get Secure Connections (Controller) from Page 2 if available 2584 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2585 } else { 2586 // otherwise, assume SC (Controller) == SC (Host) 2587 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2588 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2589 } 2590 done = true; 2591 } 2592 break; 2593 case 2: 2594 hci_handle_remote_features_page_2(conn, features); 2595 done = true; 2596 break; 2597 default: 2598 break; 2599 } 2600 if (!done) break; 2601 } 2602 hci_handle_remote_features_received(conn); 2603 break; 2604 2605 case HCI_EVENT_LINK_KEY_REQUEST: 2606 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2607 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2608 // request handled by hci_run() 2609 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2610 break; 2611 2612 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2613 reverse_bd_addr(&packet[2], addr); 2614 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2615 if (!conn) break; 2616 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2617 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2618 // Change Connection Encryption keeps link key type 2619 if (link_key_type != CHANGED_COMBINATION_KEY){ 2620 conn->link_key_type = link_key_type; 2621 } 2622 // only store link key: 2623 // - if bondable enabled 2624 if (hci_stack->bondable == false) break; 2625 // - for SSP, also check if remote side requested bonding as well 2626 if (conn->link_key_type != COMBINATION_KEY){ 2627 uint8_t auth_req_ignoring_mitm = conn->io_cap_response_auth_req & 0xfe; 2628 if (auth_req_ignoring_mitm == SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_NO_BONDING){ 2629 break; 2630 } 2631 } 2632 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2633 // still forward event to allow dismiss of pairing dialog 2634 break; 2635 } 2636 2637 case HCI_EVENT_PIN_CODE_REQUEST: 2638 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2639 // non-bondable mode: pin code negative reply will be sent 2640 if (!hci_stack->bondable){ 2641 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2642 hci_run(); 2643 return; 2644 } 2645 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2646 if (!hci_stack->link_key_db) break; 2647 hci_event_pin_code_request_get_bd_addr(packet, addr); 2648 hci_stack->link_key_db->delete_link_key(addr); 2649 break; 2650 2651 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2652 hci_event_io_capability_response_get_bd_addr(packet, addr); 2653 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2654 if (!conn) break; 2655 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2656 break; 2657 2658 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2659 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2660 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2661 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2662 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2663 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2664 } else { 2665 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2666 } 2667 #endif 2668 break; 2669 2670 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2671 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2672 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2673 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_REMOTE_OOB_DATA_REPLY); 2674 break; 2675 #endif 2676 2677 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2678 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2679 if (!hci_stack->ssp_auto_accept) break; 2680 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2681 break; 2682 2683 case HCI_EVENT_USER_PASSKEY_REQUEST: 2684 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2685 if (!hci_stack->ssp_auto_accept) break; 2686 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2687 break; 2688 2689 case HCI_EVENT_MODE_CHANGE: 2690 handle = hci_event_mode_change_get_handle(packet); 2691 conn = hci_connection_for_handle(handle); 2692 if (!conn) break; 2693 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2694 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2695 break; 2696 #endif 2697 2698 case HCI_EVENT_ENCRYPTION_CHANGE: 2699 handle = hci_event_encryption_change_get_connection_handle(packet); 2700 conn = hci_connection_for_handle(handle); 2701 if (!conn) break; 2702 if (hci_event_encryption_change_get_status(packet) == 0u) { 2703 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2704 if (encryption_enabled){ 2705 if (hci_is_le_connection(conn)){ 2706 // For LE, we accept connection as encrypted 2707 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2708 } 2709 #ifdef ENABLE_CLASSIC 2710 else { 2711 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2712 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2713 bool connected_uses_aes_ccm = encryption_enabled == 2; 2714 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2715 log_info("SC during pairing, but only E0 now -> abort"); 2716 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2717 break; 2718 } 2719 2720 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2721 if (connected_uses_aes_ccm){ 2722 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2723 } 2724 2725 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2726 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2727 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2728 } else { 2729 // if not, pretend everything is perfect 2730 hci_handle_read_encryption_key_size_complete(conn, 16); 2731 } 2732 } 2733 #endif 2734 } else { 2735 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2736 } 2737 } 2738 2739 break; 2740 2741 #ifdef ENABLE_CLASSIC 2742 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2743 handle = hci_event_authentication_complete_get_connection_handle(packet); 2744 conn = hci_connection_for_handle(handle); 2745 if (!conn) break; 2746 2747 // ignore authentication event if we didn't request it 2748 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2749 2750 // dedicated bonding: send result and disconnect 2751 if (conn->bonding_flags & BONDING_DEDICATED){ 2752 conn->bonding_flags &= ~BONDING_DEDICATED; 2753 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2754 conn->bonding_status = packet[2]; 2755 break; 2756 } 2757 2758 // authenticated only if auth status == 0 2759 if (hci_event_authentication_complete_get_status(packet) == 0){ 2760 // authenticated 2761 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2762 2763 // If link key sufficient for requested security and not already encrypted, start encryption 2764 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2765 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2766 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2767 break; 2768 } 2769 } 2770 2771 // emit updated security level 2772 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2773 break; 2774 #endif 2775 2776 // HCI_EVENT_DISCONNECTION_COMPLETE 2777 // has been split, to first notify stack before shutting connection down 2778 // see end of function, too. 2779 case HCI_EVENT_DISCONNECTION_COMPLETE: 2780 if (packet[2]) break; // status != 0 2781 handle = little_endian_read_16(packet, 3); 2782 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2783 if (hci_stack->acl_fragmentation_total_size > 0u) { 2784 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2785 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2786 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2787 hci_stack->acl_fragmentation_total_size = 0; 2788 hci_stack->acl_fragmentation_pos = 0; 2789 if (release_buffer){ 2790 hci_release_packet_buffer(); 2791 } 2792 } 2793 } 2794 2795 conn = hci_connection_for_handle(handle); 2796 if (!conn) break; 2797 // mark connection for shutdown 2798 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2799 2800 // emit dedicatd bonding event 2801 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2802 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2803 } 2804 2805 #ifdef ENABLE_BLE 2806 #ifdef ENABLE_LE_PERIPHERAL 2807 // re-enable advertisements for le connections if active 2808 if (hci_is_le_connection(conn)){ 2809 hci_update_advertisements_enabled_for_current_roles(); 2810 } 2811 #endif 2812 #endif 2813 break; 2814 2815 case HCI_EVENT_HARDWARE_ERROR: 2816 log_error("Hardware Error: 0x%02x", packet[2]); 2817 if (hci_stack->hardware_error_callback){ 2818 (*hci_stack->hardware_error_callback)(packet[2]); 2819 } else { 2820 // if no special requests, just reboot stack 2821 hci_power_control_off(); 2822 hci_power_control_on(); 2823 } 2824 break; 2825 2826 #ifdef ENABLE_CLASSIC 2827 case HCI_EVENT_ROLE_CHANGE: 2828 if (packet[2]) break; // status != 0 2829 reverse_bd_addr(&packet[3], addr); 2830 addr_type = BD_ADDR_TYPE_ACL; 2831 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2832 if (!conn) break; 2833 conn->role = packet[9]; 2834 break; 2835 #endif 2836 2837 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2838 // release packet buffer only for asynchronous transport and if there are not further fragements 2839 if (hci_transport_synchronous()) { 2840 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2841 return; // instead of break: to avoid re-entering hci_run() 2842 } 2843 hci_stack->acl_fragmentation_tx_active = 0; 2844 if (hci_stack->acl_fragmentation_total_size) break; 2845 hci_release_packet_buffer(); 2846 2847 // L2CAP receives this event via the hci_emit_event below 2848 2849 #ifdef ENABLE_CLASSIC 2850 // For SCO, we do the can_send_now_check here 2851 hci_notify_if_sco_can_send_now(); 2852 #endif 2853 break; 2854 2855 #ifdef ENABLE_CLASSIC 2856 case HCI_EVENT_SCO_CAN_SEND_NOW: 2857 // For SCO, we do the can_send_now_check here 2858 hci_stack->sco_can_send_now = 1; 2859 hci_notify_if_sco_can_send_now(); 2860 return; 2861 2862 // explode inquriy results for easier consumption 2863 case HCI_EVENT_INQUIRY_RESULT: 2864 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2865 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2866 gap_inquiry_explode(packet, size); 2867 break; 2868 #endif 2869 2870 #ifdef ENABLE_BLE 2871 case HCI_EVENT_LE_META: 2872 switch (packet[2]){ 2873 #ifdef ENABLE_LE_CENTRAL 2874 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2875 // log_info("advertising report received"); 2876 if (!hci_stack->le_scanning_enabled) break; 2877 le_handle_advertisement_report(packet, size); 2878 break; 2879 #endif 2880 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2881 event_handle_le_connection_complete(packet); 2882 break; 2883 2884 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2885 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2886 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2887 conn = hci_connection_for_handle(handle); 2888 if (!conn) break; 2889 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2890 break; 2891 2892 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2893 // connection 2894 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2895 conn = hci_connection_for_handle(handle); 2896 if (conn) { 2897 // read arguments 2898 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2899 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2900 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2901 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2902 2903 // validate against current connection parameter range 2904 le_connection_parameter_range_t existing_range; 2905 gap_get_connection_parameter_range(&existing_range); 2906 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2907 if (update_parameter){ 2908 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2909 conn->le_conn_interval_min = le_conn_interval_min; 2910 conn->le_conn_interval_max = le_conn_interval_max; 2911 conn->le_conn_latency = le_conn_latency; 2912 conn->le_supervision_timeout = le_supervision_timeout; 2913 } else { 2914 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 2915 } 2916 } 2917 break; 2918 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2919 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2920 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2921 conn = hci_connection_for_handle(handle); 2922 if (conn) { 2923 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2924 } 2925 break; 2926 #endif 2927 default: 2928 break; 2929 } 2930 break; 2931 #endif 2932 case HCI_EVENT_VENDOR_SPECIFIC: 2933 // Vendor specific commands often create vendor specific event instead of num completed packets 2934 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2935 switch (hci_stack->manufacturer){ 2936 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2937 hci_stack->num_cmd_packets = 1; 2938 break; 2939 default: 2940 break; 2941 } 2942 break; 2943 default: 2944 break; 2945 } 2946 2947 handle_event_for_current_stack_state(packet, size); 2948 2949 // notify upper stack 2950 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2951 2952 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2953 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 2954 handle = little_endian_read_16(packet, 3); 2955 hci_connection_t * aConn = hci_connection_for_handle(handle); 2956 // discard connection if app did not trigger a reconnect in the event handler 2957 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2958 hci_shutdown_connection(aConn); 2959 } 2960 } 2961 2962 // execute main loop 2963 hci_run(); 2964 } 2965 2966 #ifdef ENABLE_CLASSIC 2967 2968 #ifdef ENABLE_SCO_OVER_HCI 2969 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2970 static void sco_schedule_tx(hci_connection_t * conn); 2971 2972 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2973 log_debug("SCO TX Timeout"); 2974 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2975 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2976 if (!conn) return; 2977 2978 // trigger send 2979 conn->sco_tx_ready = 1; 2980 // extra packet if CVSD but SCO buffer is too short 2981 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2982 conn->sco_tx_ready++; 2983 } 2984 hci_notify_if_sco_can_send_now(); 2985 } 2986 2987 2988 #define SCO_TX_AFTER_RX_MS (6) 2989 2990 static void sco_schedule_tx(hci_connection_t * conn){ 2991 2992 uint32_t now = btstack_run_loop_get_time_ms(); 2993 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2994 int time_delta_ms = sco_tx_ms - now; 2995 2996 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2997 2998 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2999 btstack_run_loop_set_timer(timer, time_delta_ms); 3000 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3001 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3002 btstack_run_loop_add_timer(timer); 3003 } 3004 #endif 3005 3006 static void sco_handler(uint8_t * packet, uint16_t size){ 3007 // lookup connection struct 3008 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3009 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3010 if (!conn) return; 3011 3012 #ifdef ENABLE_SCO_OVER_HCI 3013 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3014 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3015 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3016 packet[2] = 0x3c; 3017 memmove(&packet[3], &packet[23], 63); 3018 size = 63; 3019 } 3020 } 3021 3022 if (hci_have_usb_transport()){ 3023 // Nothing to do 3024 } else { 3025 // 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); 3026 if (hci_stack->synchronous_flow_control_enabled == 0){ 3027 uint32_t now = btstack_run_loop_get_time_ms(); 3028 3029 if (!conn->sco_rx_valid){ 3030 // ignore first 10 packets 3031 conn->sco_rx_count++; 3032 // log_debug("sco rx count %u", conn->sco_rx_count); 3033 if (conn->sco_rx_count == 10) { 3034 // use first timestamp as is and pretent it just started 3035 conn->sco_rx_ms = now; 3036 conn->sco_rx_valid = 1; 3037 conn->sco_rx_count = 0; 3038 sco_schedule_tx(conn); 3039 } 3040 } else { 3041 // track expected arrival timme 3042 conn->sco_rx_count++; 3043 conn->sco_rx_ms += 7; 3044 int delta = (int32_t) (now - conn->sco_rx_ms); 3045 if (delta > 0){ 3046 conn->sco_rx_ms++; 3047 } 3048 // log_debug("sco rx %u", conn->sco_rx_ms); 3049 sco_schedule_tx(conn); 3050 } 3051 } 3052 } 3053 #endif 3054 3055 // deliver to app 3056 if (hci_stack->sco_packet_handler) { 3057 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3058 } 3059 3060 #ifdef HAVE_SCO_TRANSPORT 3061 // We can send one packet for each received packet 3062 conn->sco_tx_ready++; 3063 hci_notify_if_sco_can_send_now(); 3064 #endif 3065 3066 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3067 conn->num_packets_completed++; 3068 hci_stack->host_completed_packets = 1; 3069 hci_run(); 3070 #endif 3071 } 3072 #endif 3073 3074 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3075 hci_dump_packet(packet_type, 1, packet, size); 3076 switch (packet_type) { 3077 case HCI_EVENT_PACKET: 3078 event_handler(packet, size); 3079 break; 3080 case HCI_ACL_DATA_PACKET: 3081 acl_handler(packet, size); 3082 break; 3083 #ifdef ENABLE_CLASSIC 3084 case HCI_SCO_DATA_PACKET: 3085 sco_handler(packet, size); 3086 break; 3087 #endif 3088 default: 3089 break; 3090 } 3091 } 3092 3093 /** 3094 * @brief Add event packet handler. 3095 */ 3096 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3097 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3098 } 3099 3100 3101 /** Register HCI packet handlers */ 3102 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3103 hci_stack->acl_packet_handler = handler; 3104 } 3105 3106 #ifdef ENABLE_CLASSIC 3107 /** 3108 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3109 */ 3110 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3111 hci_stack->sco_packet_handler = handler; 3112 } 3113 #endif 3114 3115 static void hci_state_reset(void){ 3116 // no connections yet 3117 hci_stack->connections = NULL; 3118 3119 // keep discoverable/connectable as this has been requested by the client(s) 3120 // hci_stack->discoverable = 0; 3121 // hci_stack->connectable = 0; 3122 // hci_stack->bondable = 1; 3123 // hci_stack->own_addr_type = 0; 3124 3125 // buffer is free 3126 hci_stack->hci_packet_buffer_reserved = 0; 3127 3128 // no pending cmds 3129 hci_stack->decline_reason = 0; 3130 hci_stack->new_scan_enable_value = 0xff; 3131 3132 hci_stack->secure_connections_active = false; 3133 3134 #ifdef ENABLE_CLASSIC 3135 hci_stack->new_page_scan_interval = 0xffff; 3136 hci_stack->new_page_scan_window = 0xffff; 3137 hci_stack->new_page_scan_type = 0xff; 3138 #endif 3139 3140 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3141 hci_stack->classic_read_local_oob_data = true; 3142 #endif 3143 3144 // LE 3145 #ifdef ENABLE_BLE 3146 memset(hci_stack->le_random_address, 0, 6); 3147 hci_stack->le_random_address_set = 0; 3148 #endif 3149 #ifdef ENABLE_LE_CENTRAL 3150 hci_stack->le_scanning_active = 0; 3151 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3152 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3153 hci_stack->le_whitelist_capacity = 0; 3154 #endif 3155 } 3156 3157 #ifdef ENABLE_CLASSIC 3158 /** 3159 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3160 */ 3161 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3162 // store and open remote device db 3163 hci_stack->link_key_db = link_key_db; 3164 if (hci_stack->link_key_db) { 3165 hci_stack->link_key_db->open(); 3166 } 3167 } 3168 #endif 3169 3170 void hci_init(const hci_transport_t *transport, const void *config){ 3171 3172 #ifdef HAVE_MALLOC 3173 if (!hci_stack) { 3174 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3175 } 3176 #else 3177 hci_stack = &hci_stack_static; 3178 #endif 3179 memset(hci_stack, 0, sizeof(hci_stack_t)); 3180 3181 // reference to use transport layer implementation 3182 hci_stack->hci_transport = transport; 3183 3184 // reference to used config 3185 hci_stack->config = config; 3186 3187 // setup pointer for outgoing packet buffer 3188 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3189 3190 // max acl payload size defined in config.h 3191 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3192 3193 // register packet handlers with transport 3194 transport->register_packet_handler(&packet_handler); 3195 3196 hci_stack->state = HCI_STATE_OFF; 3197 3198 // class of device 3199 hci_stack->class_of_device = 0x007a020c; // Smartphone 3200 3201 // bondable by default 3202 hci_stack->bondable = 1; 3203 3204 #ifdef ENABLE_CLASSIC 3205 // classic name 3206 hci_stack->local_name = default_classic_name; 3207 3208 // Master slave policy 3209 hci_stack->master_slave_policy = 1; 3210 3211 // Allow Role Switch 3212 hci_stack->allow_role_switch = 1; 3213 3214 // Default / minimum security level = 2 3215 hci_stack->gap_security_level = LEVEL_2; 3216 3217 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3218 hci_stack->gap_required_encyrption_key_size = 7; 3219 3220 // Link Supervision Timeout 3221 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3222 3223 #endif 3224 3225 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3226 hci_stack->ssp_enable = 1; 3227 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3228 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3229 hci_stack->ssp_auto_accept = 1; 3230 3231 // Secure Connections: enable (requires support from Controller) 3232 hci_stack->secure_connections_enable = true; 3233 3234 // voice setting - signed 16 bit pcm data with CVSD over the air 3235 hci_stack->sco_voice_setting = 0x60; 3236 3237 #ifdef ENABLE_LE_CENTRAL 3238 // connection parameter to use for outgoing connections 3239 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3240 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3241 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3242 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3243 hci_stack->le_connection_latency = 4; // 4 3244 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3245 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3246 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3247 3248 // default LE Scanning 3249 hci_stack->le_scan_type = 0x1; // active 3250 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3251 hci_stack->le_scan_window = 0x30; // 30 ms 3252 #endif 3253 3254 #ifdef ENABLE_LE_PERIPHERAL 3255 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3256 #endif 3257 3258 // connection parameter range used to answer connection parameter update requests in l2cap 3259 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3260 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3261 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3262 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3263 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3264 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3265 3266 hci_state_reset(); 3267 } 3268 3269 void hci_deinit(void){ 3270 #ifdef HAVE_MALLOC 3271 if (hci_stack) { 3272 free(hci_stack); 3273 } 3274 #endif 3275 hci_stack = NULL; 3276 3277 #ifdef ENABLE_CLASSIC 3278 disable_l2cap_timeouts = 0; 3279 #endif 3280 } 3281 3282 /** 3283 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3284 */ 3285 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3286 hci_stack->chipset = chipset_driver; 3287 3288 // reset chipset driver - init is also called on power_up 3289 if (hci_stack->chipset && hci_stack->chipset->init){ 3290 hci_stack->chipset->init(hci_stack->config); 3291 } 3292 } 3293 3294 /** 3295 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3296 */ 3297 void hci_set_control(const btstack_control_t *hardware_control){ 3298 // references to used control implementation 3299 hci_stack->control = hardware_control; 3300 // init with transport config 3301 hardware_control->init(hci_stack->config); 3302 } 3303 3304 void hci_close(void){ 3305 // close remote device db 3306 if (hci_stack->link_key_db) { 3307 hci_stack->link_key_db->close(); 3308 } 3309 3310 btstack_linked_list_iterator_t lit; 3311 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3312 while (btstack_linked_list_iterator_has_next(&lit)){ 3313 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3314 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3315 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3316 hci_shutdown_connection(connection); 3317 } 3318 3319 hci_power_control(HCI_POWER_OFF); 3320 3321 #ifdef HAVE_MALLOC 3322 free(hci_stack); 3323 #endif 3324 hci_stack = NULL; 3325 } 3326 3327 #ifdef HAVE_SCO_TRANSPORT 3328 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3329 hci_stack->sco_transport = sco_transport; 3330 sco_transport->register_packet_handler(&packet_handler); 3331 } 3332 #endif 3333 3334 #ifdef ENABLE_CLASSIC 3335 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3336 // validate ranage and set 3337 if (encryption_key_size < 7) return; 3338 if (encryption_key_size > 16) return; 3339 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3340 } 3341 3342 void gap_set_security_level(gap_security_level_t security_level){ 3343 hci_stack->gap_security_level = security_level; 3344 } 3345 3346 gap_security_level_t gap_get_security_level(void){ 3347 return hci_stack->gap_security_level; 3348 } 3349 #endif 3350 3351 #ifdef ENABLE_CLASSIC 3352 void gap_set_class_of_device(uint32_t class_of_device){ 3353 hci_stack->class_of_device = class_of_device; 3354 } 3355 3356 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3357 hci_stack->default_link_policy_settings = default_link_policy_settings; 3358 } 3359 3360 void gap_set_allow_role_switch(bool allow_role_switch){ 3361 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3362 } 3363 3364 uint8_t hci_get_allow_role_switch(void){ 3365 return hci_stack->allow_role_switch; 3366 } 3367 3368 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3369 hci_stack->link_supervision_timeout = link_supervision_timeout; 3370 } 3371 3372 void hci_disable_l2cap_timeout_check(void){ 3373 disable_l2cap_timeouts = 1; 3374 } 3375 #endif 3376 3377 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3378 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3379 void hci_set_bd_addr(bd_addr_t addr){ 3380 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3381 hci_stack->custom_bd_addr_set = 1; 3382 } 3383 #endif 3384 3385 // State-Module-Driver overview 3386 // state module low-level 3387 // HCI_STATE_OFF off close 3388 // HCI_STATE_INITIALIZING, on open 3389 // HCI_STATE_WORKING, on open 3390 // HCI_STATE_HALTING, on open 3391 // HCI_STATE_SLEEPING, off/sleep close 3392 // HCI_STATE_FALLING_ASLEEP on open 3393 3394 static int hci_power_control_on(void){ 3395 3396 // power on 3397 int err = 0; 3398 if (hci_stack->control && hci_stack->control->on){ 3399 err = (*hci_stack->control->on)(); 3400 } 3401 if (err){ 3402 log_error( "POWER_ON failed"); 3403 hci_emit_hci_open_failed(); 3404 return err; 3405 } 3406 3407 // int chipset driver 3408 if (hci_stack->chipset && hci_stack->chipset->init){ 3409 hci_stack->chipset->init(hci_stack->config); 3410 } 3411 3412 // init transport 3413 if (hci_stack->hci_transport->init){ 3414 hci_stack->hci_transport->init(hci_stack->config); 3415 } 3416 3417 // open transport 3418 err = hci_stack->hci_transport->open(); 3419 if (err){ 3420 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3421 if (hci_stack->control && hci_stack->control->off){ 3422 (*hci_stack->control->off)(); 3423 } 3424 hci_emit_hci_open_failed(); 3425 return err; 3426 } 3427 return 0; 3428 } 3429 3430 static void hci_power_control_off(void){ 3431 3432 log_info("hci_power_control_off"); 3433 3434 // close low-level device 3435 hci_stack->hci_transport->close(); 3436 3437 log_info("hci_power_control_off - hci_transport closed"); 3438 3439 // power off 3440 if (hci_stack->control && hci_stack->control->off){ 3441 (*hci_stack->control->off)(); 3442 } 3443 3444 log_info("hci_power_control_off - control closed"); 3445 3446 hci_stack->state = HCI_STATE_OFF; 3447 } 3448 3449 static void hci_power_control_sleep(void){ 3450 3451 log_info("hci_power_control_sleep"); 3452 3453 #if 0 3454 // don't close serial port during sleep 3455 3456 // close low-level device 3457 hci_stack->hci_transport->close(hci_stack->config); 3458 #endif 3459 3460 // sleep mode 3461 if (hci_stack->control && hci_stack->control->sleep){ 3462 (*hci_stack->control->sleep)(); 3463 } 3464 3465 hci_stack->state = HCI_STATE_SLEEPING; 3466 } 3467 3468 static int hci_power_control_wake(void){ 3469 3470 log_info("hci_power_control_wake"); 3471 3472 // wake on 3473 if (hci_stack->control && hci_stack->control->wake){ 3474 (*hci_stack->control->wake)(); 3475 } 3476 3477 #if 0 3478 // open low-level device 3479 int err = hci_stack->hci_transport->open(hci_stack->config); 3480 if (err){ 3481 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3482 if (hci_stack->control && hci_stack->control->off){ 3483 (*hci_stack->control->off)(); 3484 } 3485 hci_emit_hci_open_failed(); 3486 return err; 3487 } 3488 #endif 3489 3490 return 0; 3491 } 3492 3493 static void hci_power_transition_to_initializing(void){ 3494 // set up state machine 3495 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3496 hci_stack->hci_packet_buffer_reserved = 0; 3497 hci_stack->state = HCI_STATE_INITIALIZING; 3498 hci_stack->substate = HCI_INIT_SEND_RESET; 3499 } 3500 3501 // returns error 3502 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3503 int err; 3504 switch (power_mode){ 3505 case HCI_POWER_ON: 3506 err = hci_power_control_on(); 3507 if (err != 0) { 3508 log_error("hci_power_control_on() error %d", err); 3509 return err; 3510 } 3511 hci_power_transition_to_initializing(); 3512 break; 3513 case HCI_POWER_OFF: 3514 // do nothing 3515 break; 3516 case HCI_POWER_SLEEP: 3517 // do nothing (with SLEEP == OFF) 3518 break; 3519 default: 3520 btstack_assert(false); 3521 break; 3522 } 3523 return ERROR_CODE_SUCCESS; 3524 } 3525 3526 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3527 switch (power_mode){ 3528 case HCI_POWER_ON: 3529 // do nothing 3530 break; 3531 case HCI_POWER_OFF: 3532 // no connections yet, just turn it off 3533 hci_power_control_off(); 3534 break; 3535 case HCI_POWER_SLEEP: 3536 // no connections yet, just turn it off 3537 hci_power_control_sleep(); 3538 break; 3539 default: 3540 btstack_assert(false); 3541 break; 3542 } 3543 return ERROR_CODE_SUCCESS; 3544 } 3545 3546 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3547 switch (power_mode){ 3548 case HCI_POWER_ON: 3549 // do nothing 3550 break; 3551 case HCI_POWER_OFF: 3552 // see hci_run 3553 hci_stack->state = HCI_STATE_HALTING; 3554 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3555 break; 3556 case HCI_POWER_SLEEP: 3557 // see hci_run 3558 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3559 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3560 break; 3561 default: 3562 btstack_assert(false); 3563 break; 3564 } 3565 return ERROR_CODE_SUCCESS; 3566 } 3567 3568 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3569 switch (power_mode){ 3570 case HCI_POWER_ON: 3571 hci_power_transition_to_initializing(); 3572 break; 3573 case HCI_POWER_OFF: 3574 // do nothing 3575 break; 3576 case HCI_POWER_SLEEP: 3577 // see hci_run 3578 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3579 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3580 break; 3581 default: 3582 btstack_assert(false); 3583 break; 3584 } 3585 return ERROR_CODE_SUCCESS; 3586 } 3587 3588 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3589 switch (power_mode){ 3590 case HCI_POWER_ON: 3591 3592 #ifdef HAVE_PLATFORM_IPHONE_OS 3593 // nothing to do, if H4 supports power management 3594 if (btstack_control_iphone_power_management_enabled()){ 3595 hci_stack->state = HCI_STATE_INITIALIZING; 3596 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3597 break; 3598 } 3599 #endif 3600 hci_power_transition_to_initializing(); 3601 break; 3602 case HCI_POWER_OFF: 3603 // see hci_run 3604 hci_stack->state = HCI_STATE_HALTING; 3605 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3606 break; 3607 case HCI_POWER_SLEEP: 3608 // do nothing 3609 break; 3610 default: 3611 btstack_assert(false); 3612 break; 3613 } 3614 return ERROR_CODE_SUCCESS; 3615 } 3616 3617 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3618 int err; 3619 switch (power_mode){ 3620 case HCI_POWER_ON: 3621 #ifdef HAVE_PLATFORM_IPHONE_OS 3622 // nothing to do, if H4 supports power management 3623 if (btstack_control_iphone_power_management_enabled()){ 3624 hci_stack->state = HCI_STATE_INITIALIZING; 3625 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3626 hci_update_scan_enable(); 3627 break; 3628 } 3629 #endif 3630 err = hci_power_control_wake(); 3631 if (err) return err; 3632 hci_power_transition_to_initializing(); 3633 break; 3634 case HCI_POWER_OFF: 3635 hci_stack->state = HCI_STATE_HALTING; 3636 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3637 break; 3638 case HCI_POWER_SLEEP: 3639 // do nothing 3640 break; 3641 default: 3642 btstack_assert(false); 3643 break; 3644 } 3645 return ERROR_CODE_SUCCESS; 3646 } 3647 3648 int hci_power_control(HCI_POWER_MODE power_mode){ 3649 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3650 int err = 0; 3651 switch (hci_stack->state){ 3652 case HCI_STATE_OFF: 3653 err = hci_power_control_state_off(power_mode); 3654 break; 3655 case HCI_STATE_INITIALIZING: 3656 err = hci_power_control_state_initializing(power_mode); 3657 break; 3658 case HCI_STATE_WORKING: 3659 err = hci_power_control_state_working(power_mode); 3660 break; 3661 case HCI_STATE_HALTING: 3662 err = hci_power_control_state_halting(power_mode); 3663 break; 3664 case HCI_STATE_FALLING_ASLEEP: 3665 err = hci_power_control_state_falling_asleep(power_mode); 3666 break; 3667 case HCI_STATE_SLEEPING: 3668 err = hci_power_control_state_sleeping(power_mode); 3669 break; 3670 default: 3671 btstack_assert(false); 3672 break; 3673 } 3674 if (err != 0){ 3675 return err; 3676 } 3677 3678 // create internal event 3679 hci_emit_state(); 3680 3681 // trigger next/first action 3682 hci_run(); 3683 3684 return 0; 3685 } 3686 3687 3688 #ifdef ENABLE_CLASSIC 3689 3690 static void hci_update_scan_enable(void){ 3691 // 2 = page scan, 1 = inq scan 3692 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3693 hci_run(); 3694 } 3695 3696 void gap_discoverable_control(uint8_t enable){ 3697 if (enable) enable = 1; // normalize argument 3698 3699 if (hci_stack->discoverable == enable){ 3700 hci_emit_discoverable_enabled(hci_stack->discoverable); 3701 return; 3702 } 3703 3704 hci_stack->discoverable = enable; 3705 hci_update_scan_enable(); 3706 } 3707 3708 void gap_connectable_control(uint8_t enable){ 3709 if (enable) enable = 1; // normalize argument 3710 3711 // don't emit event 3712 if (hci_stack->connectable == enable) return; 3713 3714 hci_stack->connectable = enable; 3715 hci_update_scan_enable(); 3716 } 3717 #endif 3718 3719 void gap_local_bd_addr(bd_addr_t address_buffer){ 3720 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3721 } 3722 3723 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3724 static void hci_host_num_completed_packets(void){ 3725 3726 // create packet manually as arrays are not supported and num_commands should not get reduced 3727 hci_reserve_packet_buffer(); 3728 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3729 3730 uint16_t size = 0; 3731 uint16_t num_handles = 0; 3732 packet[size++] = 0x35; 3733 packet[size++] = 0x0c; 3734 size++; // skip param len 3735 size++; // skip num handles 3736 3737 // add { handle, packets } entries 3738 btstack_linked_item_t * it; 3739 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3740 hci_connection_t * connection = (hci_connection_t *) it; 3741 if (connection->num_packets_completed){ 3742 little_endian_store_16(packet, size, connection->con_handle); 3743 size += 2; 3744 little_endian_store_16(packet, size, connection->num_packets_completed); 3745 size += 2; 3746 // 3747 num_handles++; 3748 connection->num_packets_completed = 0; 3749 } 3750 } 3751 3752 packet[2] = size - 3; 3753 packet[3] = num_handles; 3754 3755 hci_stack->host_completed_packets = 0; 3756 3757 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3758 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3759 3760 // release packet buffer for synchronous transport implementations 3761 if (hci_transport_synchronous()){ 3762 hci_release_packet_buffer(); 3763 hci_emit_transport_packet_sent(); 3764 } 3765 } 3766 #endif 3767 3768 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3769 UNUSED(ds); 3770 hci_stack->substate = HCI_HALTING_CLOSE; 3771 // allow packet handlers to defer final shutdown 3772 hci_emit_state(); 3773 hci_run(); 3774 } 3775 3776 static bool hci_run_acl_fragments(void){ 3777 if (hci_stack->acl_fragmentation_total_size > 0u) { 3778 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3779 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3780 if (connection) { 3781 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3782 hci_send_acl_packet_fragments(connection); 3783 return true; 3784 } 3785 } else { 3786 // connection gone -> discard further fragments 3787 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3788 hci_stack->acl_fragmentation_total_size = 0; 3789 hci_stack->acl_fragmentation_pos = 0; 3790 } 3791 } 3792 return false; 3793 } 3794 3795 #ifdef ENABLE_CLASSIC 3796 static bool hci_run_general_gap_classic(void){ 3797 3798 // decline incoming connections 3799 if (hci_stack->decline_reason){ 3800 uint8_t reason = hci_stack->decline_reason; 3801 hci_stack->decline_reason = 0; 3802 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3803 return true; 3804 } 3805 // write page scan activity 3806 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_interval != 0xffff) && hci_classic_supported()){ 3807 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 3808 hci_stack->new_page_scan_interval = 0xffff; 3809 hci_stack->new_page_scan_window = 0xffff; 3810 return true; 3811 } 3812 // write page scan type 3813 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_type != 0xff) && hci_classic_supported()){ 3814 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 3815 hci_stack->new_page_scan_type = 0xff; 3816 return true; 3817 } 3818 // send scan enable 3819 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3820 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3821 hci_stack->new_scan_enable_value = 0xff; 3822 return true; 3823 } 3824 // start/stop inquiry 3825 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3826 uint8_t duration = hci_stack->inquiry_state; 3827 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 3828 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3829 return true; 3830 } 3831 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3832 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3833 hci_send_cmd(&hci_inquiry_cancel); 3834 return true; 3835 } 3836 // remote name request 3837 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3838 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3839 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3840 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3841 return true; 3842 } 3843 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3844 // Local OOB data 3845 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 3846 hci_stack->classic_read_local_oob_data = false; 3847 if (hci_stack->local_supported_commands[1] & 0x10u){ 3848 hci_send_cmd(&hci_read_local_extended_oob_data); 3849 } else { 3850 hci_send_cmd(&hci_read_local_oob_data); 3851 } 3852 } 3853 #endif 3854 // pairing 3855 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3856 uint8_t state = hci_stack->gap_pairing_state; 3857 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3858 uint8_t pin_code[16]; 3859 switch (state){ 3860 case GAP_PAIRING_STATE_SEND_PIN: 3861 memset(pin_code, 0, 16); 3862 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 3863 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 3864 break; 3865 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3866 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3867 break; 3868 case GAP_PAIRING_STATE_SEND_PASSKEY: 3869 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3870 break; 3871 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3872 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3873 break; 3874 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3875 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3876 break; 3877 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3878 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3879 break; 3880 default: 3881 break; 3882 } 3883 return true; 3884 } 3885 return false; 3886 } 3887 #endif 3888 3889 #ifdef ENABLE_BLE 3890 static bool hci_run_general_gap_le(void){ 3891 3892 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3893 3894 if (hci_stack->state != HCI_STATE_WORKING) return false; 3895 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3896 3897 3898 // Phase 1: collect what to stop 3899 3900 bool scanning_stop = false; 3901 bool connecting_stop = false; 3902 bool advertising_stop = false; 3903 3904 #ifndef ENABLE_LE_CENTRAL 3905 UNUSED(scanning_stop); 3906 UNUSED(connecting_stop); 3907 #endif 3908 #ifndef ENABLE_LE_PERIPHERAL 3909 UNUSED(advertising_stop); 3910 #endif 3911 3912 // check if whitelist needs modification 3913 bool whitelist_modification_pending = false; 3914 btstack_linked_list_iterator_t lit; 3915 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3916 while (btstack_linked_list_iterator_has_next(&lit)){ 3917 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3918 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3919 whitelist_modification_pending = true; 3920 break; 3921 } 3922 } 3923 // check if resolving list needs modification 3924 bool resolving_list_modification_pending = false; 3925 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3926 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 3927 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 3928 resolving_list_modification_pending = true; 3929 } 3930 #endif 3931 3932 #ifdef ENABLE_LE_CENTRAL 3933 // scanning control 3934 if (hci_stack->le_scanning_active) { 3935 // stop if: 3936 // - parameter change required 3937 // - it's disabled 3938 // - whitelist change required but used for scanning 3939 // - resolving list modified 3940 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 3941 if ((hci_stack->le_scanning_param_update) || 3942 !hci_stack->le_scanning_enabled || 3943 scanning_uses_whitelist || 3944 resolving_list_modification_pending){ 3945 3946 scanning_stop = true; 3947 } 3948 } 3949 #endif 3950 3951 #ifdef ENABLE_LE_CENTRAL 3952 // connecting control 3953 bool connecting_with_whitelist; 3954 switch (hci_stack->le_connecting_state){ 3955 case LE_CONNECTING_DIRECT: 3956 case LE_CONNECTING_WHITELIST: 3957 // stop connecting if: 3958 // - connecting uses white and whitelist modification pending 3959 // - if it got disabled 3960 // - resolving list modified 3961 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 3962 if ((connecting_with_whitelist && whitelist_modification_pending) || 3963 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 3964 resolving_list_modification_pending) { 3965 3966 connecting_stop = true; 3967 } 3968 break; 3969 default: 3970 break; 3971 } 3972 #endif 3973 3974 #ifdef ENABLE_LE_PERIPHERAL 3975 // le advertisement control 3976 if (hci_stack->le_advertisements_active){ 3977 // stop if: 3978 // - parameter change required 3979 // - it's disabled 3980 // - whitelist change required but used for advertisement filter policy 3981 // - resolving list modified 3982 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy > 0; 3983 if ((hci_stack->le_advertisements_todo != 0) || 3984 !hci_stack->le_advertisements_enabled_for_current_roles || 3985 (advertising_uses_whitelist & whitelist_modification_pending) || 3986 resolving_list_modification_pending) { 3987 3988 advertising_stop = true; 3989 } 3990 } 3991 #endif 3992 3993 3994 // Phase 2: stop everything that should be off during modifications 3995 3996 #ifdef ENABLE_LE_CENTRAL 3997 if (scanning_stop){ 3998 hci_stack->le_scanning_active = false; 3999 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4000 return true; 4001 } 4002 #endif 4003 4004 #ifdef ENABLE_LE_CENTRAL 4005 if (connecting_stop){ 4006 hci_send_cmd(&hci_le_create_connection_cancel); 4007 return true; 4008 } 4009 #endif 4010 4011 #ifdef ENABLE_LE_PERIPHERAL 4012 if (advertising_stop){ 4013 hci_stack->le_advertisements_active = false; 4014 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4015 return true; 4016 } 4017 #endif 4018 4019 // Phase 3: modify 4020 4021 #ifdef ENABLE_LE_CENTRAL 4022 if (hci_stack->le_scanning_param_update){ 4023 hci_stack->le_scanning_param_update = false; 4024 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4025 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4026 return true; 4027 } 4028 #endif 4029 4030 #ifdef ENABLE_LE_PERIPHERAL 4031 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4032 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4033 hci_send_cmd(&hci_le_set_advertising_parameters, 4034 hci_stack->le_advertisements_interval_min, 4035 hci_stack->le_advertisements_interval_max, 4036 hci_stack->le_advertisements_type, 4037 hci_stack->le_own_addr_type, 4038 hci_stack->le_advertisements_direct_address_type, 4039 hci_stack->le_advertisements_direct_address, 4040 hci_stack->le_advertisements_channel_map, 4041 hci_stack->le_advertisements_filter_policy); 4042 return true; 4043 } 4044 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4045 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4046 uint8_t adv_data_clean[31]; 4047 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4048 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4049 hci_stack->le_advertisements_data_len); 4050 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4051 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4052 return true; 4053 } 4054 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4055 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4056 uint8_t scan_data_clean[31]; 4057 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4058 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4059 hci_stack->le_scan_response_data_len); 4060 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4061 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4062 return true; 4063 } 4064 #endif 4065 4066 4067 #ifdef ENABLE_LE_CENTRAL 4068 // if connect with whitelist was active and is not cancelled yet, wait until next time 4069 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4070 #endif 4071 4072 // LE Whitelist Management 4073 if (whitelist_modification_pending){ 4074 // add/remove entries 4075 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4076 while (btstack_linked_list_iterator_has_next(&lit)){ 4077 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4078 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4079 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4080 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4081 return true; 4082 } 4083 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4084 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4085 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4086 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4087 return true; 4088 } 4089 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4090 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4091 btstack_memory_whitelist_entry_free(entry); 4092 } 4093 } 4094 } 4095 4096 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4097 // LE Resolving List Management 4098 if (resolving_list_supported) { 4099 uint16_t i; 4100 switch (hci_stack->le_resolving_list_state) { 4101 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4102 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4103 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4104 return true; 4105 case LE_RESOLVING_LIST_READ_SIZE: 4106 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4107 hci_send_cmd(&hci_le_read_resolving_list_size); 4108 return true; 4109 case LE_RESOLVING_LIST_SEND_CLEAR: 4110 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4111 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4112 sizeof(hci_stack->le_resolving_list_add_entries)); 4113 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4114 sizeof(hci_stack->le_resolving_list_remove_entries)); 4115 hci_send_cmd(&hci_le_clear_resolving_list); 4116 return true; 4117 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4118 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4119 uint8_t offset = i >> 3; 4120 uint8_t mask = 1 << (i & 7); 4121 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4122 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4123 bd_addr_t peer_identity_addreses; 4124 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4125 sm_key_t peer_irk; 4126 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4127 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4128 4129 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4130 // trigger whitelist entry 'update' (work around for controller bug) 4131 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4132 while (btstack_linked_list_iterator_has_next(&lit)) { 4133 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4134 if (entry->address_type != peer_identity_addr_type) continue; 4135 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4136 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4137 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4138 } 4139 #endif 4140 4141 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4142 peer_identity_addreses); 4143 return true; 4144 } 4145 4146 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4147 4148 /* fall through */ 4149 4150 case LE_RESOLVING_LIST_ADD_ENTRIES: 4151 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4152 uint8_t offset = i >> 3; 4153 uint8_t mask = 1 << (i & 7); 4154 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4155 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4156 bd_addr_t peer_identity_addreses; 4157 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4158 sm_key_t peer_irk; 4159 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4160 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4161 const uint8_t *local_irk = gap_get_persistent_irk(); 4162 // command uses format specifier 'P' that stores 16-byte value without flip 4163 uint8_t local_irk_flipped[16]; 4164 uint8_t peer_irk_flipped[16]; 4165 reverse_128(local_irk, local_irk_flipped); 4166 reverse_128(peer_irk, peer_irk_flipped); 4167 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4168 peer_irk_flipped, local_irk_flipped); 4169 return true; 4170 } 4171 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4172 break; 4173 4174 default: 4175 break; 4176 } 4177 } 4178 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4179 #endif 4180 4181 // Phase 4: restore state 4182 4183 #ifdef ENABLE_LE_CENTRAL 4184 // re-start scanning 4185 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4186 hci_stack->le_scanning_active = true; 4187 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4188 return true; 4189 } 4190 #endif 4191 4192 #ifdef ENABLE_LE_CENTRAL 4193 // re-start connecting 4194 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4195 bd_addr_t null_addr; 4196 memset(null_addr, 0, 6); 4197 hci_send_cmd(&hci_le_create_connection, 4198 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4199 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4200 1, // use whitelist 4201 0, // peer address type 4202 null_addr, // peer bd addr 4203 hci_stack->le_own_addr_type, // our addr type: 4204 hci_stack->le_connection_interval_min, // conn interval min 4205 hci_stack->le_connection_interval_max, // conn interval max 4206 hci_stack->le_connection_latency, // conn latency 4207 hci_stack->le_supervision_timeout, // conn latency 4208 hci_stack->le_minimum_ce_length, // min ce length 4209 hci_stack->le_maximum_ce_length // max ce length 4210 ); 4211 return true; 4212 } 4213 #endif 4214 4215 #ifdef ENABLE_LE_PERIPHERAL 4216 // re-start advertising 4217 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4218 // check if advertisements should be enabled given 4219 hci_stack->le_advertisements_active = true; 4220 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4221 return true; 4222 } 4223 #endif 4224 4225 return false; 4226 } 4227 #endif 4228 4229 static bool hci_run_general_pending_commands(void){ 4230 btstack_linked_item_t * it; 4231 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4232 hci_connection_t * connection = (hci_connection_t *) it; 4233 4234 switch(connection->state){ 4235 case SEND_CREATE_CONNECTION: 4236 switch(connection->address_type){ 4237 #ifdef ENABLE_CLASSIC 4238 case BD_ADDR_TYPE_ACL: 4239 log_info("sending hci_create_connection"); 4240 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4241 break; 4242 #endif 4243 default: 4244 #ifdef ENABLE_BLE 4245 #ifdef ENABLE_LE_CENTRAL 4246 log_info("sending hci_le_create_connection"); 4247 hci_send_cmd(&hci_le_create_connection, 4248 hci_stack->le_connection_scan_interval, // conn scan interval 4249 hci_stack->le_connection_scan_window, // conn scan windows 4250 0, // don't use whitelist 4251 connection->address_type, // peer address type 4252 connection->address, // peer bd addr 4253 hci_stack->le_own_addr_type, // our addr type: 4254 hci_stack->le_connection_interval_min, // conn interval min 4255 hci_stack->le_connection_interval_max, // conn interval max 4256 hci_stack->le_connection_latency, // conn latency 4257 hci_stack->le_supervision_timeout, // conn latency 4258 hci_stack->le_minimum_ce_length, // min ce length 4259 hci_stack->le_maximum_ce_length // max ce length 4260 ); 4261 connection->state = SENT_CREATE_CONNECTION; 4262 #endif 4263 #endif 4264 break; 4265 } 4266 return true; 4267 4268 #ifdef ENABLE_CLASSIC 4269 case RECEIVED_CONNECTION_REQUEST: 4270 connection->role = HCI_ROLE_SLAVE; 4271 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4272 log_info("sending hci_accept_connection_request"); 4273 connection->state = ACCEPTED_CONNECTION_REQUEST; 4274 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4275 } 4276 return true; 4277 #endif 4278 4279 #ifdef ENABLE_BLE 4280 #ifdef ENABLE_LE_CENTRAL 4281 case SEND_CANCEL_CONNECTION: 4282 connection->state = SENT_CANCEL_CONNECTION; 4283 hci_send_cmd(&hci_le_create_connection_cancel); 4284 return true; 4285 #endif 4286 #endif 4287 case SEND_DISCONNECT: 4288 connection->state = SENT_DISCONNECT; 4289 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4290 return true; 4291 4292 default: 4293 break; 4294 } 4295 4296 // no further commands if connection is about to get shut down 4297 if (connection->state == SENT_DISCONNECT) continue; 4298 4299 if (connection->authentication_flags & READ_RSSI){ 4300 connectionClearAuthenticationFlags(connection, READ_RSSI); 4301 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4302 return true; 4303 } 4304 4305 #ifdef ENABLE_CLASSIC 4306 4307 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4308 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4309 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4310 return true; 4311 } 4312 4313 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 4314 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4315 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4316 4317 link_key_t link_key; 4318 link_key_type_t link_key_type; 4319 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 4320 4321 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4322 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4323 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 4324 if (sc_downgrade){ 4325 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4326 connection->state = SENT_DISCONNECT; 4327 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4328 return true; 4329 } 4330 4331 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 4332 if (have_link_key && security_level_sufficient){ 4333 connection->link_key_type = link_key_type; 4334 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 4335 } else { 4336 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4337 } 4338 return true; 4339 } 4340 4341 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4342 log_info("denying to pin request"); 4343 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4344 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4345 return true; 4346 } 4347 4348 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4349 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4350 // set authentication requirements: 4351 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4352 // - BONDING MODE: Dedicated if requested, otherwise bondable flag 4353 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4354 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4355 authreq |= 1; 4356 } 4357 if (connection->bonding_flags & BONDING_DEDICATED){ 4358 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4359 } else if (hci_stack->bondable){ 4360 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4361 } 4362 uint8_t have_oob_data = 0; 4363 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4364 if (connection->classic_oob_c_192 != NULL){ 4365 have_oob_data |= 1; 4366 } 4367 if (connection->classic_oob_c_256 != NULL){ 4368 have_oob_data |= 2; 4369 } 4370 #endif 4371 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4372 return true; 4373 } 4374 4375 if (connection->authentication_flags & SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4376 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4377 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4378 return true; 4379 } 4380 4381 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4382 if (connection->authentication_flags & SEND_REMOTE_OOB_DATA_REPLY){ 4383 connectionClearAuthenticationFlags(connection, SEND_REMOTE_OOB_DATA_REPLY); 4384 const uint8_t zero[16] = { 0 }; 4385 const uint8_t * r_192 = zero; 4386 const uint8_t * c_192 = zero; 4387 const uint8_t * r_256 = zero; 4388 const uint8_t * c_256 = zero; 4389 // verify P-256 OOB 4390 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4391 c_256 = connection->classic_oob_c_256; 4392 if (connection->classic_oob_r_256 != NULL) { 4393 r_256 = connection->classic_oob_r_256; 4394 } 4395 } 4396 // verify P-192 OOB 4397 if ((connection->classic_oob_c_192 != NULL)) { 4398 c_192 = connection->classic_oob_c_192; 4399 if (connection->classic_oob_r_192 != NULL) { 4400 r_192 = connection->classic_oob_r_192; 4401 } 4402 } 4403 // Reply 4404 if (c_256 != zero) { 4405 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4406 } else if (c_192 != zero){ 4407 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4408 } else { 4409 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4410 } 4411 return true; 4412 } 4413 #endif 4414 4415 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4416 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4417 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4418 return true; 4419 } 4420 4421 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4422 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4423 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4424 return true; 4425 } 4426 4427 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4428 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4429 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4430 return true; 4431 } 4432 4433 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4434 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4435 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4436 return true; 4437 } 4438 4439 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4440 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4441 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4442 return true; 4443 } 4444 4445 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4446 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4447 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4448 connection->state = SENT_DISCONNECT; 4449 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4450 return true; 4451 } 4452 4453 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4454 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4455 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4456 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4457 return true; 4458 } 4459 4460 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4461 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4462 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4463 return true; 4464 } 4465 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4466 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4467 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4468 return true; 4469 } 4470 #endif 4471 4472 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4473 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4474 if (connection->state != SENT_DISCONNECT){ 4475 connection->state = SENT_DISCONNECT; 4476 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4477 return true; 4478 } 4479 } 4480 4481 #ifdef ENABLE_CLASSIC 4482 uint16_t sniff_min_interval; 4483 switch (connection->sniff_min_interval){ 4484 case 0: 4485 break; 4486 case 0xffff: 4487 connection->sniff_min_interval = 0; 4488 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4489 return true; 4490 default: 4491 sniff_min_interval = connection->sniff_min_interval; 4492 connection->sniff_min_interval = 0; 4493 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4494 return true; 4495 } 4496 4497 if (connection->sniff_subrating_max_latency != 0xffff){ 4498 uint16_t max_latency = connection->sniff_subrating_max_latency; 4499 connection->sniff_subrating_max_latency = 0; 4500 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4501 return true; 4502 } 4503 4504 if (connection->request_role != HCI_ROLE_INVALID){ 4505 hci_role_t role = connection->request_role; 4506 connection->request_role = HCI_ROLE_INVALID; 4507 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4508 return true; 4509 } 4510 #endif 4511 4512 #ifdef ENABLE_BLE 4513 switch (connection->le_con_parameter_update_state){ 4514 // response to L2CAP CON PARAMETER UPDATE REQUEST 4515 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4516 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4517 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4518 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4519 0x0000, 0xffff); 4520 return true; 4521 case CON_PARAMETER_UPDATE_REPLY: 4522 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4523 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4524 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4525 0x0000, 0xffff); 4526 return true; 4527 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4528 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4529 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4530 return true; 4531 default: 4532 break; 4533 } 4534 if (connection->le_phy_update_all_phys != 0xffu){ 4535 uint8_t all_phys = connection->le_phy_update_all_phys; 4536 connection->le_phy_update_all_phys = 0xff; 4537 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); 4538 return true; 4539 } 4540 #endif 4541 } 4542 return false; 4543 } 4544 4545 static void hci_run(void){ 4546 4547 bool done; 4548 4549 // send continuation fragments first, as they block the prepared packet buffer 4550 done = hci_run_acl_fragments(); 4551 if (done) return; 4552 4553 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4554 // send host num completed packets next as they don't require num_cmd_packets > 0 4555 if (!hci_can_send_comand_packet_transport()) return; 4556 if (hci_stack->host_completed_packets){ 4557 hci_host_num_completed_packets(); 4558 return; 4559 } 4560 #endif 4561 4562 if (!hci_can_send_command_packet_now()) return; 4563 4564 // global/non-connection oriented commands 4565 4566 4567 #ifdef ENABLE_CLASSIC 4568 // general gap classic 4569 done = hci_run_general_gap_classic(); 4570 if (done) return; 4571 #endif 4572 4573 #ifdef ENABLE_BLE 4574 // general gap le 4575 done = hci_run_general_gap_le(); 4576 if (done) return; 4577 #endif 4578 4579 // send pending HCI commands 4580 done = hci_run_general_pending_commands(); 4581 if (done) return; 4582 4583 // stack state sub statemachines 4584 hci_connection_t * connection; 4585 switch (hci_stack->state){ 4586 case HCI_STATE_INITIALIZING: 4587 hci_initializing_run(); 4588 break; 4589 4590 case HCI_STATE_HALTING: 4591 4592 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4593 switch (hci_stack->substate){ 4594 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4595 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4596 4597 #ifdef ENABLE_BLE 4598 #ifdef ENABLE_LE_CENTRAL 4599 // free whitelist entries 4600 { 4601 btstack_linked_list_iterator_t lit; 4602 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4603 while (btstack_linked_list_iterator_has_next(&lit)){ 4604 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4605 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4606 btstack_memory_whitelist_entry_free(entry); 4607 } 4608 } 4609 #endif 4610 #endif 4611 // close all open connections 4612 connection = (hci_connection_t *) hci_stack->connections; 4613 if (connection){ 4614 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4615 if (!hci_can_send_command_packet_now()) return; 4616 4617 // check state 4618 if (connection->state == SENT_DISCONNECT) return; 4619 connection->state = SENT_DISCONNECT; 4620 4621 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4622 4623 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4624 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4625 4626 // ... which would be ignored anyway as we shutdown (free) the connection now 4627 hci_shutdown_connection(connection); 4628 4629 // finally, send the disconnect command 4630 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4631 return; 4632 } 4633 4634 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4635 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4636 log_info("HCI_STATE_HALTING: wait 50 ms"); 4637 hci_stack->substate = HCI_HALTING_W4_TIMER; 4638 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4639 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4640 btstack_run_loop_add_timer(&hci_stack->timeout); 4641 break; 4642 } 4643 4644 /* fall through */ 4645 4646 case HCI_HALTING_CLOSE: 4647 log_info("HCI_STATE_HALTING, calling off"); 4648 4649 // switch mode 4650 hci_power_control_off(); 4651 4652 log_info("HCI_STATE_HALTING, emitting state"); 4653 hci_emit_state(); 4654 log_info("HCI_STATE_HALTING, done"); 4655 break; 4656 4657 case HCI_HALTING_W4_TIMER: 4658 // keep waiting 4659 4660 break; 4661 default: 4662 break; 4663 } 4664 4665 break; 4666 4667 case HCI_STATE_FALLING_ASLEEP: 4668 switch(hci_stack->substate) { 4669 case HCI_FALLING_ASLEEP_DISCONNECT: 4670 log_info("HCI_STATE_FALLING_ASLEEP"); 4671 // close all open connections 4672 connection = (hci_connection_t *) hci_stack->connections; 4673 4674 #ifdef HAVE_PLATFORM_IPHONE_OS 4675 // don't close connections, if H4 supports power management 4676 if (btstack_control_iphone_power_management_enabled()){ 4677 connection = NULL; 4678 } 4679 #endif 4680 if (connection){ 4681 4682 // send disconnect 4683 if (!hci_can_send_command_packet_now()) return; 4684 4685 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4686 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4687 4688 // send disconnected event right away - causes higher layer connections to get closed, too. 4689 hci_shutdown_connection(connection); 4690 return; 4691 } 4692 4693 if (hci_classic_supported()){ 4694 // disable page and inquiry scan 4695 if (!hci_can_send_command_packet_now()) return; 4696 4697 log_info("HCI_STATE_HALTING, disabling inq scans"); 4698 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4699 4700 // continue in next sub state 4701 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4702 break; 4703 } 4704 4705 /* fall through */ 4706 4707 case HCI_FALLING_ASLEEP_COMPLETE: 4708 log_info("HCI_STATE_HALTING, calling sleep"); 4709 #ifdef HAVE_PLATFORM_IPHONE_OS 4710 // don't actually go to sleep, if H4 supports power management 4711 if (btstack_control_iphone_power_management_enabled()){ 4712 // SLEEP MODE reached 4713 hci_stack->state = HCI_STATE_SLEEPING; 4714 hci_emit_state(); 4715 break; 4716 } 4717 #endif 4718 // switch mode 4719 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4720 hci_emit_state(); 4721 break; 4722 4723 default: 4724 break; 4725 } 4726 break; 4727 4728 default: 4729 break; 4730 } 4731 } 4732 4733 int hci_send_cmd_packet(uint8_t *packet, int size){ 4734 // house-keeping 4735 4736 #ifdef ENABLE_CLASSIC 4737 bd_addr_t addr; 4738 hci_connection_t * conn; 4739 #endif 4740 #ifdef ENABLE_LE_CENTRAL 4741 uint8_t initiator_filter_policy; 4742 #endif 4743 4744 uint16_t opcode = little_endian_read_16(packet, 0); 4745 switch (opcode) { 4746 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4747 hci_stack->loopback_mode = packet[3]; 4748 break; 4749 4750 #ifdef ENABLE_CLASSIC 4751 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4752 reverse_bd_addr(&packet[3], addr); 4753 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4754 4755 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4756 if (!conn) { 4757 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4758 if (!conn) { 4759 // notify client that alloc failed 4760 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4761 return -1; // packet not sent to controller 4762 } 4763 conn->state = SEND_CREATE_CONNECTION; 4764 conn->role = HCI_ROLE_MASTER; 4765 } 4766 log_info("conn state %u", conn->state); 4767 switch (conn->state) { 4768 // if connection active exists 4769 case OPEN: 4770 // and OPEN, emit connection complete command 4771 hci_emit_connection_complete(addr, conn->con_handle, 0); 4772 return -1; // packet not sent to controller 4773 case RECEIVED_DISCONNECTION_COMPLETE: 4774 // create connection triggered in disconnect complete event, let's do it now 4775 break; 4776 case SEND_CREATE_CONNECTION: 4777 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4778 break; 4779 default: 4780 // otherwise, just ignore as it is already in the open process 4781 return -1; // packet not sent to controller 4782 } 4783 conn->state = SENT_CREATE_CONNECTION; 4784 4785 // track outgoing connection 4786 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4787 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4788 break; 4789 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4790 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4791 break; 4792 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4793 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4794 break; 4795 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4796 if (hci_stack->link_key_db) { 4797 reverse_bd_addr(&packet[3], addr); 4798 hci_stack->link_key_db->delete_link_key(addr); 4799 } 4800 break; 4801 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4802 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4803 reverse_bd_addr(&packet[3], addr); 4804 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4805 if (conn) { 4806 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4807 } 4808 break; 4809 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4810 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4811 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4812 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4813 reverse_bd_addr(&packet[3], addr); 4814 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4815 if (conn) { 4816 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4817 } 4818 break; 4819 4820 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 4821 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4822 // setup_synchronous_connection? Voice setting at offset 22 4823 // TODO: compare to current setting if sco connection already active 4824 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4825 break; 4826 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4827 // accept_synchronus_connection? Voice setting at offset 18 4828 // TODO: compare to current setting if sco connection already active 4829 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4830 break; 4831 #endif 4832 #endif 4833 4834 #ifdef ENABLE_BLE 4835 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4836 hci_stack->le_random_address_set = 1; 4837 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4838 break; 4839 #ifdef ENABLE_LE_PERIPHERAL 4840 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4841 hci_stack->le_advertisements_active = packet[3] != 0; 4842 break; 4843 #endif 4844 #ifdef ENABLE_LE_CENTRAL 4845 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4846 // white list used? 4847 initiator_filter_policy = packet[7]; 4848 switch (initiator_filter_policy) { 4849 case 0: 4850 // whitelist not used 4851 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4852 break; 4853 case 1: 4854 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4855 break; 4856 default: 4857 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4858 break; 4859 } 4860 // track outgoing connection 4861 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 4862 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 4863 break; 4864 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4865 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 4866 break; 4867 #endif 4868 #endif 4869 default: 4870 break; 4871 } 4872 4873 hci_stack->num_cmd_packets--; 4874 4875 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4876 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4877 } 4878 4879 // disconnect because of security block 4880 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4881 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4882 if (!connection) return; 4883 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4884 } 4885 4886 4887 // Configure Secure Simple Pairing 4888 4889 #ifdef ENABLE_CLASSIC 4890 4891 // enable will enable SSP during init 4892 void gap_ssp_set_enable(int enable){ 4893 hci_stack->ssp_enable = enable; 4894 } 4895 4896 static int hci_local_ssp_activated(void){ 4897 return gap_ssp_supported() && hci_stack->ssp_enable; 4898 } 4899 4900 // if set, BTstack will respond to io capability request using authentication requirement 4901 void gap_ssp_set_io_capability(int io_capability){ 4902 hci_stack->ssp_io_capability = io_capability; 4903 } 4904 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4905 hci_stack->ssp_authentication_requirement = authentication_requirement; 4906 } 4907 4908 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4909 void gap_ssp_set_auto_accept(int auto_accept){ 4910 hci_stack->ssp_auto_accept = auto_accept; 4911 } 4912 4913 void gap_secure_connections_enable(bool enable){ 4914 hci_stack->secure_connections_enable = enable; 4915 } 4916 4917 #endif 4918 4919 // va_list part of hci_send_cmd 4920 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4921 if (!hci_can_send_command_packet_now()){ 4922 log_error("hci_send_cmd called but cannot send packet now"); 4923 return 0; 4924 } 4925 4926 // for HCI INITIALIZATION 4927 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4928 hci_stack->last_cmd_opcode = cmd->opcode; 4929 4930 hci_reserve_packet_buffer(); 4931 uint8_t * packet = hci_stack->hci_packet_buffer; 4932 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4933 int err = hci_send_cmd_packet(packet, size); 4934 4935 // release packet buffer on error or for synchronous transport implementations 4936 if ((err < 0) || hci_transport_synchronous()){ 4937 hci_release_packet_buffer(); 4938 hci_emit_transport_packet_sent(); 4939 } 4940 4941 return err; 4942 } 4943 4944 /** 4945 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4946 */ 4947 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4948 va_list argptr; 4949 va_start(argptr, cmd); 4950 int res = hci_send_cmd_va_arg(cmd, argptr); 4951 va_end(argptr); 4952 return res; 4953 } 4954 4955 // Create various non-HCI events. 4956 // TODO: generalize, use table similar to hci_create_command 4957 4958 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4959 // dump packet 4960 if (dump) { 4961 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4962 } 4963 4964 // dispatch to all event handlers 4965 btstack_linked_list_iterator_t it; 4966 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4967 while (btstack_linked_list_iterator_has_next(&it)){ 4968 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4969 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4970 } 4971 } 4972 4973 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4974 if (!hci_stack->acl_packet_handler) return; 4975 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4976 } 4977 4978 #ifdef ENABLE_CLASSIC 4979 static void hci_notify_if_sco_can_send_now(void){ 4980 // notify SCO sender if waiting 4981 if (!hci_stack->sco_waiting_for_can_send_now) return; 4982 if (hci_can_send_sco_packet_now()){ 4983 hci_stack->sco_waiting_for_can_send_now = 0; 4984 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4985 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4986 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4987 } 4988 } 4989 4990 // parsing end emitting has been merged to reduce code size 4991 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4992 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4993 4994 uint8_t * eir_data; 4995 ad_context_t context; 4996 const uint8_t * name; 4997 uint8_t name_len; 4998 4999 if (size < 3) return; 5000 5001 int event_type = hci_event_packet_get_type(packet); 5002 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5003 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5004 5005 switch (event_type){ 5006 case HCI_EVENT_INQUIRY_RESULT: 5007 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5008 if (size != (3 + (num_responses * 14))) return; 5009 break; 5010 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5011 if (size != 257) return; 5012 if (num_responses != 1) return; 5013 break; 5014 default: 5015 return; 5016 } 5017 5018 // event[1] is set at the end 5019 int i; 5020 for (i=0; i<num_responses;i++){ 5021 memset(event, 0, sizeof(event)); 5022 event[0] = GAP_EVENT_INQUIRY_RESULT; 5023 uint8_t event_size = 18; // if name is not set by EIR 5024 5025 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5026 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5027 (void)memcpy(&event[9], 5028 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5029 3); // class of device 5030 (void)memcpy(&event[12], 5031 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5032 2); // clock offset 5033 5034 switch (event_type){ 5035 case HCI_EVENT_INQUIRY_RESULT: 5036 // 14,15,16,17 = 0, size 18 5037 break; 5038 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5039 event[14] = 1; 5040 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5041 // 16,17 = 0, size 18 5042 break; 5043 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5044 event[14] = 1; 5045 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5046 // EIR packets only contain a single inquiry response 5047 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5048 name = NULL; 5049 // Iterate over EIR data 5050 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5051 uint8_t data_type = ad_iterator_get_data_type(&context); 5052 uint8_t data_size = ad_iterator_get_data_len(&context); 5053 const uint8_t * data = ad_iterator_get_data(&context); 5054 // Prefer Complete Local Name over Shortend Local Name 5055 switch (data_type){ 5056 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5057 if (name) continue; 5058 /* fall through */ 5059 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5060 name = data; 5061 name_len = data_size; 5062 break; 5063 default: 5064 break; 5065 } 5066 } 5067 if (name){ 5068 event[16] = 1; 5069 // truncate name if needed 5070 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5071 event[17] = len; 5072 (void)memcpy(&event[18], name, len); 5073 event_size += len; 5074 } 5075 break; 5076 default: 5077 return; 5078 } 5079 event[1] = event_size - 2; 5080 hci_emit_event(event, event_size, 1); 5081 } 5082 } 5083 #endif 5084 5085 void hci_emit_state(void){ 5086 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5087 uint8_t event[3]; 5088 event[0] = BTSTACK_EVENT_STATE; 5089 event[1] = sizeof(event) - 2u; 5090 event[2] = hci_stack->state; 5091 hci_emit_event(event, sizeof(event), 1); 5092 } 5093 5094 #ifdef ENABLE_CLASSIC 5095 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5096 uint8_t event[13]; 5097 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5098 event[1] = sizeof(event) - 2; 5099 event[2] = status; 5100 little_endian_store_16(event, 3, con_handle); 5101 reverse_bd_addr(address, &event[5]); 5102 event[11] = 1; // ACL connection 5103 event[12] = 0; // encryption disabled 5104 hci_emit_event(event, sizeof(event), 1); 5105 } 5106 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5107 if (disable_l2cap_timeouts) return; 5108 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5109 uint8_t event[4]; 5110 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5111 event[1] = sizeof(event) - 2; 5112 little_endian_store_16(event, 2, conn->con_handle); 5113 hci_emit_event(event, sizeof(event), 1); 5114 } 5115 #endif 5116 5117 #ifdef ENABLE_BLE 5118 #ifdef ENABLE_LE_CENTRAL 5119 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){ 5120 uint8_t event[21]; 5121 event[0] = HCI_EVENT_LE_META; 5122 event[1] = sizeof(event) - 2u; 5123 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5124 event[3] = status; 5125 little_endian_store_16(event, 4, con_handle); 5126 event[6] = 0; // TODO: role 5127 event[7] = address_type; 5128 reverse_bd_addr(address, &event[8]); 5129 little_endian_store_16(event, 14, 0); // interval 5130 little_endian_store_16(event, 16, 0); // latency 5131 little_endian_store_16(event, 18, 0); // supervision timeout 5132 event[20] = 0; // master clock accuracy 5133 hci_emit_event(event, sizeof(event), 1); 5134 } 5135 #endif 5136 #endif 5137 5138 static void hci_emit_transport_packet_sent(void){ 5139 // notify upper stack that it might be possible to send again 5140 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5141 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5142 } 5143 5144 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5145 uint8_t event[6]; 5146 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5147 event[1] = sizeof(event) - 2u; 5148 event[2] = 0; // status = OK 5149 little_endian_store_16(event, 3, con_handle); 5150 event[5] = reason; 5151 hci_emit_event(event, sizeof(event), 1); 5152 } 5153 5154 static void hci_emit_nr_connections_changed(void){ 5155 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5156 uint8_t event[3]; 5157 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5158 event[1] = sizeof(event) - 2u; 5159 event[2] = nr_hci_connections(); 5160 hci_emit_event(event, sizeof(event), 1); 5161 } 5162 5163 static void hci_emit_hci_open_failed(void){ 5164 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5165 uint8_t event[2]; 5166 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5167 event[1] = sizeof(event) - 2u; 5168 hci_emit_event(event, sizeof(event), 1); 5169 } 5170 5171 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5172 log_info("hci_emit_dedicated_bonding_result %u ", status); 5173 uint8_t event[9]; 5174 int pos = 0; 5175 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5176 event[pos++] = sizeof(event) - 2u; 5177 event[pos++] = status; 5178 reverse_bd_addr(address, &event[pos]); 5179 hci_emit_event(event, sizeof(event), 1); 5180 } 5181 5182 5183 #ifdef ENABLE_CLASSIC 5184 5185 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5186 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5187 uint8_t event[5]; 5188 int pos = 0; 5189 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5190 event[pos++] = sizeof(event) - 2; 5191 little_endian_store_16(event, 2, con_handle); 5192 pos += 2; 5193 event[pos++] = level; 5194 hci_emit_event(event, sizeof(event), 1); 5195 } 5196 5197 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5198 if (!connection) return LEVEL_0; 5199 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5200 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5201 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5202 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5203 // LEVEL 4 always requires 128 bit encrytion key size 5204 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5205 security_level = LEVEL_3; 5206 } 5207 return security_level; 5208 } 5209 5210 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5211 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5212 uint8_t event[3]; 5213 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5214 event[1] = sizeof(event) - 2; 5215 event[2] = enabled; 5216 hci_emit_event(event, sizeof(event), 1); 5217 } 5218 5219 // query if remote side supports eSCO 5220 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5221 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5222 if (!connection) return 0; 5223 return (connection->remote_supported_features[0] & 1) != 0; 5224 } 5225 5226 static bool hci_ssp_supported(hci_connection_t * connection){ 5227 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5228 return (connection->bonding_flags & mask) == mask; 5229 } 5230 5231 // query if remote side supports SSP 5232 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5233 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5234 if (!connection) return 0; 5235 return hci_ssp_supported(connection) ? 1 : 0; 5236 } 5237 5238 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5239 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5240 } 5241 5242 // GAP API 5243 /** 5244 * @bbrief enable/disable bonding. default is enabled 5245 * @praram enabled 5246 */ 5247 void gap_set_bondable_mode(int enable){ 5248 hci_stack->bondable = enable ? 1 : 0; 5249 } 5250 /** 5251 * @brief Get bondable mode. 5252 * @return 1 if bondable 5253 */ 5254 int gap_get_bondable_mode(void){ 5255 return hci_stack->bondable; 5256 } 5257 5258 /** 5259 * @brief map link keys to security levels 5260 */ 5261 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5262 switch (link_key_type){ 5263 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5264 return LEVEL_4; 5265 case COMBINATION_KEY: 5266 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5267 return LEVEL_3; 5268 default: 5269 return LEVEL_2; 5270 } 5271 } 5272 5273 /** 5274 * @brief map link keys to secure connection yes/no 5275 */ 5276 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5277 switch (link_key_type){ 5278 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5279 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5280 return 1; 5281 default: 5282 return 0; 5283 } 5284 } 5285 5286 /** 5287 * @brief map link keys to authenticated 5288 */ 5289 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5290 switch (link_key_type){ 5291 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5292 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5293 return 1; 5294 default: 5295 return 0; 5296 } 5297 } 5298 5299 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5300 log_info("gap_mitm_protection_required_for_security_level %u", level); 5301 return level > LEVEL_2; 5302 } 5303 5304 /** 5305 * @brief get current security level 5306 */ 5307 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5308 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5309 if (!connection) return LEVEL_0; 5310 return gap_security_level_for_connection(connection); 5311 } 5312 5313 /** 5314 * @brief request connection to device to 5315 * @result GAP_AUTHENTICATION_RESULT 5316 */ 5317 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5318 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5319 if (!connection){ 5320 hci_emit_security_level(con_handle, LEVEL_0); 5321 return; 5322 } 5323 5324 btstack_assert(hci_is_le_connection(connection) == false); 5325 5326 gap_security_level_t current_level = gap_security_level(con_handle); 5327 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5328 requested_level, connection->requested_security_level, current_level); 5329 5330 // assumption: earlier requested security higher than current level => security request is active 5331 if (current_level < connection->requested_security_level){ 5332 if (connection->requested_security_level < requested_level){ 5333 // increase requested level as new level is higher 5334 5335 // TODO: handle re-authentication when done 5336 5337 connection->requested_security_level = requested_level; 5338 } 5339 return; 5340 } 5341 5342 // no request active, notify if security sufficient 5343 if (requested_level <= current_level){ 5344 hci_emit_security_level(con_handle, current_level); 5345 return; 5346 } 5347 5348 // store request 5349 connection->requested_security_level = requested_level; 5350 5351 // start to authenticate connection if authentication not already active 5352 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 5353 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5354 hci_run(); 5355 } 5356 5357 /** 5358 * @brief start dedicated bonding with device. disconnect after bonding 5359 * @param device 5360 * @param request MITM protection 5361 * @result GAP_DEDICATED_BONDING_COMPLETE 5362 */ 5363 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5364 5365 // create connection state machine 5366 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5367 5368 if (!connection){ 5369 return BTSTACK_MEMORY_ALLOC_FAILED; 5370 } 5371 5372 // delete linkn key 5373 gap_drop_link_key_for_bd_addr(device); 5374 5375 // configure LEVEL_2/3, dedicated bonding 5376 connection->state = SEND_CREATE_CONNECTION; 5377 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5378 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5379 connection->bonding_flags = BONDING_DEDICATED; 5380 5381 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5382 5383 // handle: connnection failure (connection complete != ok) 5384 // handle: authentication failure 5385 // handle: disconnect on done 5386 5387 hci_run(); 5388 5389 return 0; 5390 } 5391 #endif 5392 5393 void gap_set_local_name(const char * local_name){ 5394 hci_stack->local_name = local_name; 5395 } 5396 5397 5398 #ifdef ENABLE_BLE 5399 5400 #ifdef ENABLE_LE_CENTRAL 5401 void gap_start_scan(void){ 5402 hci_stack->le_scanning_enabled = true; 5403 hci_run(); 5404 } 5405 5406 void gap_stop_scan(void){ 5407 hci_stack->le_scanning_enabled = false; 5408 hci_run(); 5409 } 5410 5411 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5412 hci_stack->le_scan_type = scan_type; 5413 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5414 hci_stack->le_scan_interval = scan_interval; 5415 hci_stack->le_scan_window = scan_window; 5416 hci_stack->le_scanning_param_update = true; 5417 hci_run(); 5418 } 5419 5420 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5421 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5422 } 5423 5424 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5425 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5426 if (!conn){ 5427 // disallow if le connection is already outgoing 5428 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5429 log_error("le connection already active"); 5430 return ERROR_CODE_COMMAND_DISALLOWED; 5431 } 5432 5433 log_info("gap_connect: no connection exists yet, creating context"); 5434 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5435 if (!conn){ 5436 // notify client that alloc failed 5437 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5438 log_info("gap_connect: failed to alloc hci_connection_t"); 5439 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5440 } 5441 5442 // set le connecting state 5443 if (hci_is_le_connection_type(addr_type)){ 5444 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5445 } 5446 5447 conn->state = SEND_CREATE_CONNECTION; 5448 log_info("gap_connect: send create connection next"); 5449 hci_run(); 5450 return ERROR_CODE_SUCCESS; 5451 } 5452 5453 if (!hci_is_le_connection(conn) || 5454 (conn->state == SEND_CREATE_CONNECTION) || 5455 (conn->state == SENT_CREATE_CONNECTION)) { 5456 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5457 log_error("gap_connect: classic connection or connect is already being created"); 5458 return GATT_CLIENT_IN_WRONG_STATE; 5459 } 5460 5461 // check if connection was just disconnected 5462 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5463 log_info("gap_connect: send create connection (again)"); 5464 conn->state = SEND_CREATE_CONNECTION; 5465 hci_run(); 5466 return ERROR_CODE_SUCCESS; 5467 } 5468 5469 log_info("gap_connect: context exists with state %u", conn->state); 5470 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5471 hci_run(); 5472 return ERROR_CODE_SUCCESS; 5473 } 5474 5475 // @assumption: only a single outgoing LE Connection exists 5476 static hci_connection_t * gap_get_outgoing_connection(void){ 5477 btstack_linked_item_t *it; 5478 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5479 hci_connection_t * conn = (hci_connection_t *) it; 5480 if (!hci_is_le_connection(conn)) continue; 5481 switch (conn->state){ 5482 case SEND_CREATE_CONNECTION: 5483 case SENT_CREATE_CONNECTION: 5484 case SENT_CANCEL_CONNECTION: 5485 return conn; 5486 default: 5487 break; 5488 }; 5489 } 5490 return NULL; 5491 } 5492 5493 uint8_t gap_connect_cancel(void){ 5494 hci_connection_t * conn = gap_get_outgoing_connection(); 5495 if (!conn) return 0; 5496 switch (conn->state){ 5497 case SEND_CREATE_CONNECTION: 5498 // skip sending create connection and emit event instead 5499 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5500 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5501 btstack_memory_hci_connection_free( conn ); 5502 break; 5503 case SENT_CREATE_CONNECTION: 5504 // request to send cancel connection 5505 conn->state = SEND_CANCEL_CONNECTION; 5506 hci_run(); 5507 break; 5508 default: 5509 break; 5510 } 5511 return 0; 5512 } 5513 #endif 5514 5515 #ifdef ENABLE_LE_CENTRAL 5516 /** 5517 * @brief Set connection parameters for outgoing connections 5518 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5519 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5520 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5521 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5522 * @param conn_latency, default: 4 5523 * @param supervision_timeout (unit: 10ms), default: 720 ms 5524 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5525 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5526 */ 5527 5528 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5529 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5530 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5531 hci_stack->le_connection_scan_interval = conn_scan_interval; 5532 hci_stack->le_connection_scan_window = conn_scan_window; 5533 hci_stack->le_connection_interval_min = conn_interval_min; 5534 hci_stack->le_connection_interval_max = conn_interval_max; 5535 hci_stack->le_connection_latency = conn_latency; 5536 hci_stack->le_supervision_timeout = supervision_timeout; 5537 hci_stack->le_minimum_ce_length = min_ce_length; 5538 hci_stack->le_maximum_ce_length = max_ce_length; 5539 } 5540 #endif 5541 5542 /** 5543 * @brief Updates the connection parameters for a given LE connection 5544 * @param handle 5545 * @param conn_interval_min (unit: 1.25ms) 5546 * @param conn_interval_max (unit: 1.25ms) 5547 * @param conn_latency 5548 * @param supervision_timeout (unit: 10ms) 5549 * @returns 0 if ok 5550 */ 5551 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5552 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5553 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5554 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5555 connection->le_conn_interval_min = conn_interval_min; 5556 connection->le_conn_interval_max = conn_interval_max; 5557 connection->le_conn_latency = conn_latency; 5558 connection->le_supervision_timeout = supervision_timeout; 5559 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5560 hci_run(); 5561 return 0; 5562 } 5563 5564 /** 5565 * @brief Request an update of the connection parameter for a given LE connection 5566 * @param handle 5567 * @param conn_interval_min (unit: 1.25ms) 5568 * @param conn_interval_max (unit: 1.25ms) 5569 * @param conn_latency 5570 * @param supervision_timeout (unit: 10ms) 5571 * @returns 0 if ok 5572 */ 5573 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5574 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5575 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5576 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5577 connection->le_conn_interval_min = conn_interval_min; 5578 connection->le_conn_interval_max = conn_interval_max; 5579 connection->le_conn_latency = conn_latency; 5580 connection->le_supervision_timeout = supervision_timeout; 5581 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5582 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5583 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5584 return 0; 5585 } 5586 5587 #ifdef ENABLE_LE_PERIPHERAL 5588 5589 /** 5590 * @brief Set Advertisement Data 5591 * @param advertising_data_length 5592 * @param advertising_data (max 31 octets) 5593 * @note data is not copied, pointer has to stay valid 5594 */ 5595 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5596 hci_stack->le_advertisements_data_len = advertising_data_length; 5597 hci_stack->le_advertisements_data = advertising_data; 5598 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5599 hci_run(); 5600 } 5601 5602 /** 5603 * @brief Set Scan Response Data 5604 * @param advertising_data_length 5605 * @param advertising_data (max 31 octets) 5606 * @note data is not copied, pointer has to stay valid 5607 */ 5608 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5609 hci_stack->le_scan_response_data_len = scan_response_data_length; 5610 hci_stack->le_scan_response_data = scan_response_data; 5611 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5612 hci_run(); 5613 } 5614 5615 /** 5616 * @brief Set Advertisement Parameters 5617 * @param adv_int_min 5618 * @param adv_int_max 5619 * @param adv_type 5620 * @param direct_address_type 5621 * @param direct_address 5622 * @param channel_map 5623 * @param filter_policy 5624 * 5625 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5626 */ 5627 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5628 uint8_t direct_address_typ, bd_addr_t direct_address, 5629 uint8_t channel_map, uint8_t filter_policy) { 5630 5631 hci_stack->le_advertisements_interval_min = adv_int_min; 5632 hci_stack->le_advertisements_interval_max = adv_int_max; 5633 hci_stack->le_advertisements_type = adv_type; 5634 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5635 hci_stack->le_advertisements_channel_map = channel_map; 5636 hci_stack->le_advertisements_filter_policy = filter_policy; 5637 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5638 6); 5639 5640 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5641 hci_run(); 5642 } 5643 5644 /** 5645 * @brief Enable/Disable Advertisements 5646 * @param enabled 5647 */ 5648 void gap_advertisements_enable(int enabled){ 5649 hci_stack->le_advertisements_enabled = enabled != 0; 5650 hci_update_advertisements_enabled_for_current_roles(); 5651 hci_run(); 5652 } 5653 5654 #endif 5655 5656 void hci_le_set_own_address_type(uint8_t own_address_type){ 5657 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5658 if (own_address_type == hci_stack->le_own_addr_type) return; 5659 hci_stack->le_own_addr_type = own_address_type; 5660 5661 #ifdef ENABLE_LE_PERIPHERAL 5662 // update advertisement parameters, too 5663 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5664 hci_run(); 5665 #endif 5666 #ifdef ENABLE_LE_CENTRAL 5667 // note: we don't update scan parameters or modify ongoing connection attempts 5668 #endif 5669 } 5670 5671 #endif 5672 5673 uint8_t gap_disconnect(hci_con_handle_t handle){ 5674 hci_connection_t * conn = hci_connection_for_handle(handle); 5675 if (!conn){ 5676 hci_emit_disconnection_complete(handle, 0); 5677 return 0; 5678 } 5679 // ignore if already disconnected 5680 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5681 return 0; 5682 } 5683 conn->state = SEND_DISCONNECT; 5684 hci_run(); 5685 return 0; 5686 } 5687 5688 int gap_read_rssi(hci_con_handle_t con_handle){ 5689 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5690 if (hci_connection == NULL) return 0; 5691 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5692 hci_run(); 5693 return 1; 5694 } 5695 5696 /** 5697 * @brief Get connection type 5698 * @param con_handle 5699 * @result connection_type 5700 */ 5701 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5702 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5703 if (!conn) return GAP_CONNECTION_INVALID; 5704 switch (conn->address_type){ 5705 case BD_ADDR_TYPE_LE_PUBLIC: 5706 case BD_ADDR_TYPE_LE_RANDOM: 5707 return GAP_CONNECTION_LE; 5708 case BD_ADDR_TYPE_SCO: 5709 return GAP_CONNECTION_SCO; 5710 case BD_ADDR_TYPE_ACL: 5711 return GAP_CONNECTION_ACL; 5712 default: 5713 return GAP_CONNECTION_INVALID; 5714 } 5715 } 5716 5717 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5718 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5719 if (!conn) return HCI_ROLE_INVALID; 5720 return (hci_role_t) conn->role; 5721 } 5722 5723 5724 #ifdef ENABLE_CLASSIC 5725 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5726 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5727 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5728 conn->request_role = role; 5729 hci_run(); 5730 return ERROR_CODE_SUCCESS; 5731 } 5732 #endif 5733 5734 #ifdef ENABLE_BLE 5735 5736 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){ 5737 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5738 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5739 5740 conn->le_phy_update_all_phys = all_phys; 5741 conn->le_phy_update_tx_phys = tx_phys; 5742 conn->le_phy_update_rx_phys = rx_phys; 5743 conn->le_phy_update_phy_options = phy_options; 5744 5745 hci_run(); 5746 5747 return 0; 5748 } 5749 5750 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5751 // check if already in list 5752 btstack_linked_list_iterator_t it; 5753 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5754 while (btstack_linked_list_iterator_has_next(&it)) { 5755 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5756 if (entry->address_type != address_type) { 5757 continue; 5758 } 5759 if (memcmp(entry->address, address, 6) != 0) { 5760 continue; 5761 } 5762 // disallow if already scheduled to add 5763 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5764 return ERROR_CODE_COMMAND_DISALLOWED; 5765 } 5766 // still on controller, but scheduled to remove -> re-add 5767 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5768 return ERROR_CODE_SUCCESS; 5769 } 5770 // alloc and add to list 5771 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5772 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5773 entry->address_type = address_type; 5774 (void)memcpy(entry->address, address, 6); 5775 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5776 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5777 return ERROR_CODE_SUCCESS; 5778 } 5779 5780 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5781 btstack_linked_list_iterator_t it; 5782 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5783 while (btstack_linked_list_iterator_has_next(&it)){ 5784 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5785 if (entry->address_type != address_type) { 5786 continue; 5787 } 5788 if (memcmp(entry->address, address, 6) != 0) { 5789 continue; 5790 } 5791 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5792 // remove from controller if already present 5793 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5794 } else { 5795 // directly remove entry from whitelist 5796 btstack_linked_list_iterator_remove(&it); 5797 btstack_memory_whitelist_entry_free(entry); 5798 } 5799 return ERROR_CODE_SUCCESS; 5800 } 5801 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5802 } 5803 5804 static void hci_whitelist_clear(void){ 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->state & LE_WHITELIST_ON_CONTROLLER){ 5810 // remove from controller if already present 5811 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5812 continue; 5813 } 5814 // directly remove entry from whitelist 5815 btstack_linked_list_iterator_remove(&it); 5816 btstack_memory_whitelist_entry_free(entry); 5817 } 5818 } 5819 5820 /** 5821 * @brief Clear Whitelist 5822 * @returns 0 if ok 5823 */ 5824 uint8_t gap_whitelist_clear(void){ 5825 hci_whitelist_clear(); 5826 hci_run(); 5827 return ERROR_CODE_SUCCESS; 5828 } 5829 5830 /** 5831 * @brief Add Device to Whitelist 5832 * @param address_typ 5833 * @param address 5834 * @returns 0 if ok 5835 */ 5836 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5837 uint8_t status = hci_whitelist_add(address_type, address); 5838 if (status){ 5839 return status; 5840 } 5841 hci_run(); 5842 return ERROR_CODE_SUCCESS; 5843 } 5844 5845 /** 5846 * @brief Remove Device from Whitelist 5847 * @param address_typ 5848 * @param address 5849 * @returns 0 if ok 5850 */ 5851 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5852 uint8_t status = hci_whitelist_remove(address_type, address); 5853 if (status){ 5854 return status; 5855 } 5856 hci_run(); 5857 return ERROR_CODE_SUCCESS; 5858 } 5859 5860 #ifdef ENABLE_LE_CENTRAL 5861 /** 5862 * @brief Connect with Whitelist 5863 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 5864 * @returns - if ok 5865 */ 5866 uint8_t gap_connect_with_whitelist(void){ 5867 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5868 return ERROR_CODE_COMMAND_DISALLOWED; 5869 } 5870 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5871 hci_run(); 5872 return ERROR_CODE_SUCCESS; 5873 } 5874 5875 /** 5876 * @brief Auto Connection Establishment - Start Connecting to device 5877 * @param address_typ 5878 * @param address 5879 * @returns 0 if ok 5880 */ 5881 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 5882 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5883 return ERROR_CODE_COMMAND_DISALLOWED; 5884 } 5885 5886 uint8_t status = hci_whitelist_add(address_type, address); 5887 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 5888 return status; 5889 } 5890 5891 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5892 5893 hci_run(); 5894 return ERROR_CODE_SUCCESS; 5895 } 5896 5897 /** 5898 * @brief Auto Connection Establishment - Stop Connecting to device 5899 * @param address_typ 5900 * @param address 5901 * @returns 0 if ok 5902 */ 5903 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 5904 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5905 return ERROR_CODE_COMMAND_DISALLOWED; 5906 } 5907 5908 hci_whitelist_remove(address_type, address); 5909 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 5910 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5911 } 5912 hci_run(); 5913 return 0; 5914 } 5915 5916 /** 5917 * @brief Auto Connection Establishment - Stop everything 5918 * @note Convenience function to stop all active auto connection attempts 5919 */ 5920 uint8_t gap_auto_connection_stop_all(void){ 5921 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 5922 return ERROR_CODE_COMMAND_DISALLOWED; 5923 } 5924 hci_whitelist_clear(); 5925 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5926 hci_run(); 5927 return ERROR_CODE_SUCCESS; 5928 } 5929 5930 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5931 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5932 if (!conn) return 0; 5933 return conn->le_connection_interval; 5934 } 5935 #endif 5936 #endif 5937 5938 #ifdef ENABLE_CLASSIC 5939 /** 5940 * @brief Set Extended Inquiry Response data 5941 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5942 * @note has to be done before stack starts up 5943 */ 5944 void gap_set_extended_inquiry_response(const uint8_t * data){ 5945 hci_stack->eir_data = data; 5946 } 5947 5948 /** 5949 * @brief Start GAP Classic Inquiry 5950 * @param duration in 1.28s units 5951 * @return 0 if ok 5952 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5953 */ 5954 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5955 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5956 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5957 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5958 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5959 } 5960 hci_stack->inquiry_state = duration_in_1280ms_units; 5961 hci_run(); 5962 return 0; 5963 } 5964 5965 /** 5966 * @brief Stop GAP Classic Inquiry 5967 * @returns 0 if ok 5968 */ 5969 int gap_inquiry_stop(void){ 5970 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5971 // emit inquiry complete event, before it even started 5972 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5973 hci_emit_event(event, sizeof(event), 1); 5974 return 0; 5975 } 5976 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5977 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5978 hci_run(); 5979 return 0; 5980 } 5981 5982 5983 /** 5984 * @brief Remote Name Request 5985 * @param addr 5986 * @param page_scan_repetition_mode 5987 * @param clock_offset only used when bit 15 is set 5988 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5989 */ 5990 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5991 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5992 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5993 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5994 hci_stack->remote_name_clock_offset = clock_offset; 5995 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5996 hci_run(); 5997 return 0; 5998 } 5999 6000 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6001 hci_stack->gap_pairing_state = state; 6002 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6003 hci_run(); 6004 return 0; 6005 } 6006 6007 /** 6008 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6009 * @param addr 6010 * @param pin_data 6011 * @param pin_len 6012 * @return 0 if ok 6013 */ 6014 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6015 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6016 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6017 hci_stack->gap_pairing_pin_len = pin_len; 6018 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6019 } 6020 6021 /** 6022 * @brief Legacy Pairing Pin Code Response 6023 * @param addr 6024 * @param pin 6025 * @return 0 if ok 6026 */ 6027 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6028 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6029 } 6030 6031 /** 6032 * @brief Abort Legacy Pairing 6033 * @param addr 6034 * @param pin 6035 * @return 0 if ok 6036 */ 6037 int gap_pin_code_negative(bd_addr_t addr){ 6038 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6039 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6040 } 6041 6042 /** 6043 * @brief SSP Passkey Response 6044 * @param addr 6045 * @param passkey 6046 * @return 0 if ok 6047 */ 6048 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6049 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6050 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6051 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6052 } 6053 6054 /** 6055 * @brief Abort SSP Passkey Entry/Pairing 6056 * @param addr 6057 * @param pin 6058 * @return 0 if ok 6059 */ 6060 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6061 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6062 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6063 } 6064 6065 /** 6066 * @brief Accept SSP Numeric Comparison 6067 * @param addr 6068 * @param passkey 6069 * @return 0 if ok 6070 */ 6071 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6072 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6073 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6074 } 6075 6076 /** 6077 * @brief Abort SSP Numeric Comparison/Pairing 6078 * @param addr 6079 * @param pin 6080 * @return 0 if ok 6081 */ 6082 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6083 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6084 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6085 } 6086 6087 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6088 6089 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6090 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6091 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6092 connectionSetAuthenticationFlags(conn, flag); 6093 hci_run(); 6094 return ERROR_CODE_SUCCESS; 6095 } 6096 6097 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6098 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_REPLY); 6099 } 6100 6101 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6102 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6103 } 6104 #endif 6105 6106 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6107 /** 6108 * @brief Report Remote OOB Data 6109 * @param bd_addr 6110 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6111 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6112 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6113 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6114 */ 6115 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){ 6116 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6117 if (connection == NULL) { 6118 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6119 } 6120 connection->classic_oob_c_192 = c_192; 6121 connection->classic_oob_r_192 = r_192; 6122 connection->classic_oob_c_256 = c_256; 6123 connection->classic_oob_r_256 = r_256; 6124 return ERROR_CODE_SUCCESS; 6125 } 6126 /** 6127 * @brief Generate new OOB data 6128 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6129 */ 6130 void gap_ssp_generate_oob_data(void){ 6131 hci_stack->classic_read_local_oob_data = true; 6132 hci_run(); 6133 } 6134 6135 #endif 6136 6137 /** 6138 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6139 * @param inquiry_mode see bluetooth_defines.h 6140 */ 6141 void hci_set_inquiry_mode(inquiry_mode_t mode){ 6142 hci_stack->inquiry_mode = mode; 6143 } 6144 6145 /** 6146 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6147 */ 6148 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6149 hci_stack->sco_voice_setting = voice_setting; 6150 } 6151 6152 /** 6153 * @brief Get SCO Voice Setting 6154 * @return current voice setting 6155 */ 6156 uint16_t hci_get_sco_voice_setting(void){ 6157 return hci_stack->sco_voice_setting; 6158 } 6159 6160 static int hci_have_usb_transport(void){ 6161 if (!hci_stack->hci_transport) return 0; 6162 const char * transport_name = hci_stack->hci_transport->name; 6163 if (!transport_name) return 0; 6164 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6165 } 6166 6167 /** @brief Get SCO packet length for current SCO Voice setting 6168 * @note Using SCO packets of the exact length is required for USB transfer 6169 * @return Length of SCO packets in bytes (not audio frames) 6170 */ 6171 int hci_get_sco_packet_length(void){ 6172 int sco_packet_length = 0; 6173 6174 #ifdef ENABLE_SCO_OVER_HCI 6175 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6176 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6177 6178 if (hci_have_usb_transport()){ 6179 // see Core Spec for H2 USB Transfer. 6180 // 3 byte SCO header + 24 bytes per connection 6181 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6182 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6183 } else { 6184 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6185 sco_packet_length = 3 + 60 * multiplier; 6186 // assert that it still fits inside an SCO buffer 6187 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6188 sco_packet_length = 3 + 60; 6189 } 6190 } 6191 #endif 6192 6193 #ifdef HAVE_SCO_TRANSPORT 6194 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6195 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6196 sco_packet_length = 3 + 60 * multiplier; 6197 #endif 6198 return sco_packet_length; 6199 } 6200 6201 /** 6202 * @brief Sets the master/slave policy 6203 * @param policy (0: attempt to become master, 1: let connecting device decide) 6204 */ 6205 void hci_set_master_slave_policy(uint8_t policy){ 6206 hci_stack->master_slave_policy = policy; 6207 } 6208 6209 #endif 6210 6211 HCI_STATE hci_get_state(void){ 6212 return hci_stack->state; 6213 } 6214 6215 #ifdef ENABLE_CLASSIC 6216 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6217 hci_stack->gap_classic_accept_callback = accept_callback; 6218 } 6219 #endif 6220 6221 /** 6222 * @brief Set callback for Bluetooth Hardware Error 6223 */ 6224 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6225 hci_stack->hardware_error_callback = fn; 6226 } 6227 6228 void hci_disconnect_all(void){ 6229 btstack_linked_list_iterator_t it; 6230 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6231 while (btstack_linked_list_iterator_has_next(&it)){ 6232 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6233 if (con->state == SENT_DISCONNECT) continue; 6234 con->state = SEND_DISCONNECT; 6235 } 6236 hci_run(); 6237 } 6238 6239 uint16_t hci_get_manufacturer(void){ 6240 return hci_stack->manufacturer; 6241 } 6242 6243 #ifdef ENABLE_BLE 6244 6245 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6246 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6247 if (!hci_con) return NULL; 6248 return &hci_con->sm_connection; 6249 } 6250 6251 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6252 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6253 6254 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6255 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6256 if (hci_connection == NULL) return 0; 6257 if (hci_is_le_connection(hci_connection)){ 6258 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6259 if (sm_conn->sm_connection_encrypted) { 6260 return sm_conn->sm_actual_encryption_key_size; 6261 } 6262 } 6263 #ifdef ENABLE_CLASSIC 6264 else { 6265 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 6266 return hci_connection->encryption_key_size; 6267 } 6268 } 6269 #endif 6270 return 0; 6271 } 6272 6273 int gap_authenticated(hci_con_handle_t con_handle){ 6274 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6275 if (hci_connection == NULL) return 0; 6276 6277 switch (hci_connection->address_type){ 6278 case BD_ADDR_TYPE_LE_PUBLIC: 6279 case BD_ADDR_TYPE_LE_RANDOM: 6280 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6281 return hci_connection->sm_connection.sm_connection_authenticated; 6282 #ifdef ENABLE_CLASSIC 6283 case BD_ADDR_TYPE_SCO: 6284 case BD_ADDR_TYPE_ACL: 6285 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6286 #endif 6287 default: 6288 return 0; 6289 } 6290 } 6291 6292 int gap_secure_connection(hci_con_handle_t con_handle){ 6293 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6294 if (hci_connection == NULL) return 0; 6295 6296 switch (hci_connection->address_type){ 6297 case BD_ADDR_TYPE_LE_PUBLIC: 6298 case BD_ADDR_TYPE_LE_RANDOM: 6299 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6300 return hci_connection->sm_connection.sm_connection_sc; 6301 #ifdef ENABLE_CLASSIC 6302 case BD_ADDR_TYPE_SCO: 6303 case BD_ADDR_TYPE_ACL: 6304 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6305 #endif 6306 default: 6307 return 0; 6308 } 6309 } 6310 6311 bool gap_bonded(hci_con_handle_t con_handle){ 6312 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6313 if (hci_connection == NULL) return 0; 6314 6315 #ifdef ENABLE_CLASSIC 6316 link_key_t link_key; 6317 link_key_type_t link_key_type; 6318 #endif 6319 switch (hci_connection->address_type){ 6320 case BD_ADDR_TYPE_LE_PUBLIC: 6321 case BD_ADDR_TYPE_LE_RANDOM: 6322 return hci_connection->sm_connection.sm_le_db_index >= 0; 6323 #ifdef ENABLE_CLASSIC 6324 case BD_ADDR_TYPE_SCO: 6325 case BD_ADDR_TYPE_ACL: 6326 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6327 #endif 6328 default: 6329 return false; 6330 } 6331 } 6332 6333 6334 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6335 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6336 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6337 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6338 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6339 return sm_conn->sm_connection_authorization_state; 6340 } 6341 #endif 6342 6343 #ifdef ENABLE_CLASSIC 6344 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){ 6345 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6346 if (!conn) return GAP_CONNECTION_INVALID; 6347 conn->sniff_min_interval = sniff_min_interval; 6348 conn->sniff_max_interval = sniff_max_interval; 6349 conn->sniff_attempt = sniff_attempt; 6350 conn->sniff_timeout = sniff_timeout; 6351 hci_run(); 6352 return 0; 6353 } 6354 6355 /** 6356 * @brief Exit Sniff mode 6357 * @param con_handle 6358 @ @return 0 if ok 6359 */ 6360 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6361 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6362 if (!conn) return GAP_CONNECTION_INVALID; 6363 conn->sniff_min_interval = 0xffff; 6364 hci_run(); 6365 return 0; 6366 } 6367 6368 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){ 6369 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6370 if (!conn) return GAP_CONNECTION_INVALID; 6371 conn->sniff_subrating_max_latency = max_latency; 6372 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6373 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6374 hci_run(); 6375 return ERROR_CODE_SUCCESS; 6376 } 6377 6378 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6379 hci_stack->new_page_scan_interval = page_scan_interval; 6380 hci_stack->new_page_scan_window = page_scan_window; 6381 hci_run(); 6382 } 6383 6384 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6385 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6386 hci_run(); 6387 } 6388 6389 #endif 6390 6391 void hci_halting_defer(void){ 6392 if (hci_stack->state != HCI_STATE_HALTING) return; 6393 switch (hci_stack->substate){ 6394 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6395 case HCI_HALTING_CLOSE: 6396 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6397 break; 6398 default: 6399 break; 6400 } 6401 } 6402 6403 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6404 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6405 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6406 if (le_device_db_index >= le_device_db_max_count()) return; 6407 uint8_t offset = le_device_db_index >> 3; 6408 uint8_t mask = 1 << (le_device_db_index & 7); 6409 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6410 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6411 // note: go back to remove entries, otherwise, a remove + add will skip the add 6412 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6413 } 6414 } 6415 6416 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6417 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6418 if (le_device_db_index >= le_device_db_max_count()) return; 6419 uint8_t offset = le_device_db_index >> 3; 6420 uint8_t mask = 1 << (le_device_db_index & 7); 6421 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6422 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6423 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6424 } 6425 } 6426 6427 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6428 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6429 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6430 } 6431 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6432 // restart le resolving list update 6433 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6434 } 6435 return ERROR_CODE_SUCCESS; 6436 } 6437 #endif 6438 6439 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6440 void hci_setup_test_connections_fuzz(void){ 6441 hci_connection_t * conn; 6442 6443 // default address: 66:55:44:33:00:01 6444 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6445 6446 // setup Controller info 6447 hci_stack->num_cmd_packets = 255; 6448 hci_stack->acl_packets_total_num = 255; 6449 6450 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6451 addr[5] = 0x01; 6452 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6453 conn->con_handle = addr[5]; 6454 conn->role = HCI_ROLE_SLAVE; 6455 conn->state = RECEIVED_CONNECTION_REQUEST; 6456 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6457 6458 // setup incoming Classic SCO connection with con handle 0x0002 6459 addr[5] = 0x02; 6460 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6461 conn->con_handle = addr[5]; 6462 conn->role = HCI_ROLE_SLAVE; 6463 conn->state = RECEIVED_CONNECTION_REQUEST; 6464 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6465 6466 // setup ready Classic ACL connection with con handle 0x0003 6467 addr[5] = 0x03; 6468 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6469 conn->con_handle = addr[5]; 6470 conn->role = HCI_ROLE_SLAVE; 6471 conn->state = OPEN; 6472 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6473 6474 // setup ready Classic SCO connection with con handle 0x0004 6475 addr[5] = 0x04; 6476 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6477 conn->con_handle = addr[5]; 6478 conn->role = HCI_ROLE_SLAVE; 6479 conn->state = OPEN; 6480 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6481 6482 // setup ready LE ACL connection with con handle 0x005 and public address 6483 addr[5] = 0x05; 6484 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6485 conn->con_handle = addr[5]; 6486 conn->role = HCI_ROLE_SLAVE; 6487 conn->state = OPEN; 6488 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6489 conn->sm_connection.sm_connection_encrypted = 1; 6490 } 6491 6492 void hci_free_connections_fuzz(void){ 6493 btstack_linked_list_iterator_t it; 6494 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6495 while (btstack_linked_list_iterator_has_next(&it)){ 6496 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6497 btstack_linked_list_iterator_remove(&it); 6498 btstack_memory_hci_connection_free(con); 6499 } 6500 } 6501 void hci_simulate_working_fuzz(void){ 6502 hci_init_done(); 6503 hci_stack->num_cmd_packets = 255; 6504 } 6505 #endif 6506