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_ACTIVE 0x80 119 #define GAP_INQUIRY_STATE_IDLE 0 120 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 121 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 122 123 // GAP Remote Name Request 124 #define GAP_REMOTE_NAME_STATE_IDLE 0 125 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 126 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 127 128 // GAP Pairing 129 #define GAP_PAIRING_STATE_IDLE 0 130 #define GAP_PAIRING_STATE_SEND_PIN 1 131 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 132 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 133 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 134 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 135 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 136 137 138 // prototypes 139 #ifdef ENABLE_CLASSIC 140 static void hci_update_scan_enable(void); 141 static void hci_emit_discoverable_enabled(uint8_t enabled); 142 static int hci_local_ssp_activated(void); 143 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 144 static bool hci_ssp_supported(hci_connection_t * connection); 145 static void hci_notify_if_sco_can_send_now(void); 146 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 147 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 148 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 149 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 150 static void hci_connection_timestamp(hci_connection_t *connection); 151 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 152 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 153 #endif 154 155 static int hci_power_control_on(void); 156 static void hci_power_control_off(void); 157 static void hci_state_reset(void); 158 static void hci_emit_transport_packet_sent(void); 159 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 160 static void hci_emit_nr_connections_changed(void); 161 static void hci_emit_hci_open_failed(void); 162 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 163 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 164 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 165 static void hci_run(void); 166 static int hci_is_le_connection(hci_connection_t * connection); 167 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 168 169 #ifdef ENABLE_CLASSIC 170 static int hci_have_usb_transport(void); 171 #endif 172 173 #ifdef ENABLE_BLE 174 #ifdef ENABLE_LE_CENTRAL 175 // called from test/ble_client/advertising_data_parser.c 176 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 177 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 178 static hci_connection_t * gap_get_outgoing_connection(void); 179 #endif 180 #endif 181 182 // the STACK is here 183 #ifndef HAVE_MALLOC 184 static hci_stack_t hci_stack_static; 185 #endif 186 static hci_stack_t * hci_stack = NULL; 187 188 #ifdef ENABLE_CLASSIC 189 // default name 190 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 191 192 // test helper 193 static uint8_t disable_l2cap_timeouts = 0; 194 #endif 195 196 /** 197 * create connection for given address 198 * 199 * @return connection OR NULL, if no memory left 200 */ 201 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 202 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 203 hci_connection_t * conn = btstack_memory_hci_connection_get(); 204 if (!conn) return NULL; 205 bd_addr_copy(conn->address, addr); 206 conn->role = HCI_ROLE_INVALID; 207 conn->address_type = addr_type; 208 conn->con_handle = 0xffff; 209 conn->authentication_flags = AUTH_FLAGS_NONE; 210 conn->bonding_flags = 0; 211 conn->requested_security_level = LEVEL_0; 212 #ifdef ENABLE_CLASSIC 213 conn->request_role = HCI_ROLE_INVALID; 214 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 215 btstack_run_loop_set_timer_context(&conn->timeout, conn); 216 hci_connection_timestamp(conn); 217 #endif 218 conn->acl_recombination_length = 0; 219 conn->acl_recombination_pos = 0; 220 conn->num_packets_sent = 0; 221 222 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 223 #ifdef ENABLE_BLE 224 conn->le_phy_update_all_phys = 0xff; 225 #endif 226 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 227 conn->le_max_tx_octets = 27; 228 #endif 229 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 230 return conn; 231 } 232 233 234 /** 235 * get le connection parameter range 236 * 237 * @return le connection parameter range struct 238 */ 239 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 240 *range = hci_stack->le_connection_parameter_range; 241 } 242 243 /** 244 * set le connection parameter range 245 * 246 */ 247 248 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 249 hci_stack->le_connection_parameter_range = *range; 250 } 251 252 /** 253 * @brief Test if connection parameters are inside in existing rage 254 * @param conn_interval_min (unit: 1.25ms) 255 * @param conn_interval_max (unit: 1.25ms) 256 * @param conn_latency 257 * @param supervision_timeout (unit: 10ms) 258 * @returns 1 if included 259 */ 260 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){ 261 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 262 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 263 264 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 265 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 266 267 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 268 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 269 270 return 1; 271 } 272 273 /** 274 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 275 * @note: default: 1 276 * @param max_peripheral_connections 277 */ 278 #ifdef ENABLE_LE_PERIPHERAL 279 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 280 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 281 } 282 #endif 283 284 /** 285 * get hci connections iterator 286 * 287 * @return hci connections iterator 288 */ 289 290 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 291 btstack_linked_list_iterator_init(it, &hci_stack->connections); 292 } 293 294 /** 295 * get connection for a given handle 296 * 297 * @return connection OR NULL, if not found 298 */ 299 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 300 btstack_linked_list_iterator_t it; 301 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 302 while (btstack_linked_list_iterator_has_next(&it)){ 303 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 304 if ( item->con_handle == con_handle ) { 305 return item; 306 } 307 } 308 return NULL; 309 } 310 311 /** 312 * get connection for given address 313 * 314 * @return connection OR NULL, if not found 315 */ 316 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 317 btstack_linked_list_iterator_t it; 318 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 319 while (btstack_linked_list_iterator_has_next(&it)){ 320 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 321 if (connection->address_type != addr_type) continue; 322 if (memcmp(addr, connection->address, 6) != 0) continue; 323 return connection; 324 } 325 return NULL; 326 } 327 328 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 329 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 330 } 331 332 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 333 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 334 } 335 336 #ifdef ENABLE_CLASSIC 337 338 #ifdef ENABLE_SCO_OVER_HCI 339 static int hci_number_sco_connections(void){ 340 int connections = 0; 341 btstack_linked_list_iterator_t it; 342 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 343 while (btstack_linked_list_iterator_has_next(&it)){ 344 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 345 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 346 connections++; 347 } 348 return connections; 349 } 350 #endif 351 352 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 353 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 354 #ifdef HAVE_EMBEDDED_TICK 355 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 356 // connections might be timed out 357 hci_emit_l2cap_check_timeout(connection); 358 } 359 #else 360 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 361 // connections might be timed out 362 hci_emit_l2cap_check_timeout(connection); 363 } 364 #endif 365 } 366 367 static void hci_connection_timestamp(hci_connection_t *connection){ 368 #ifdef HAVE_EMBEDDED_TICK 369 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 370 #else 371 connection->timestamp = btstack_run_loop_get_time_ms(); 372 #endif 373 } 374 375 /** 376 * add authentication flags and reset timer 377 * @note: assumes classic connection 378 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 379 */ 380 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 381 bd_addr_t addr; 382 reverse_bd_addr(bd_addr, addr); 383 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 384 if (conn) { 385 connectionSetAuthenticationFlags(conn, flags); 386 hci_connection_timestamp(conn); 387 } 388 } 389 390 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 391 hci_connection_t * conn = hci_connection_for_handle(handle); 392 if (!conn) return 0; 393 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 394 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 395 return 0; 396 } 397 398 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 399 if (!hci_stack->link_key_db) return; 400 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 401 hci_stack->link_key_db->delete_link_key(addr); 402 } 403 404 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 405 if (!hci_stack->link_key_db) return; 406 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 407 hci_stack->link_key_db->put_link_key(addr, link_key, type); 408 } 409 410 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 411 if (!hci_stack->link_key_db) return false; 412 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 413 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 414 return result; 415 } 416 417 void gap_delete_all_link_keys(void){ 418 bd_addr_t addr; 419 link_key_t link_key; 420 link_key_type_t type; 421 btstack_link_key_iterator_t it; 422 int ok = gap_link_key_iterator_init(&it); 423 if (!ok) { 424 log_error("could not initialize iterator"); 425 return; 426 } 427 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 428 gap_drop_link_key_for_bd_addr(addr); 429 } 430 gap_link_key_iterator_done(&it); 431 } 432 433 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 434 if (!hci_stack->link_key_db) return 0; 435 if (!hci_stack->link_key_db->iterator_init) return 0; 436 return hci_stack->link_key_db->iterator_init(it); 437 } 438 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){ 439 if (!hci_stack->link_key_db) return 0; 440 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 441 } 442 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 443 if (!hci_stack->link_key_db) return; 444 hci_stack->link_key_db->iterator_done(it); 445 } 446 #endif 447 448 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 449 switch (address_type){ 450 case BD_ADDR_TYPE_LE_PUBLIC: 451 case BD_ADDR_TYPE_LE_RANDOM: 452 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 453 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 454 return true; 455 default: 456 return false; 457 } 458 } 459 460 static int hci_is_le_connection(hci_connection_t * connection){ 461 return hci_is_le_connection_type(connection->address_type); 462 } 463 464 /** 465 * count connections 466 */ 467 static int nr_hci_connections(void){ 468 int count = 0; 469 btstack_linked_item_t *it; 470 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 471 count++; 472 } 473 return count; 474 } 475 476 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 477 478 unsigned int num_packets_sent_classic = 0; 479 unsigned int num_packets_sent_le = 0; 480 481 btstack_linked_item_t *it; 482 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 483 hci_connection_t * connection = (hci_connection_t *) it; 484 if (hci_is_le_connection(connection)){ 485 num_packets_sent_le += connection->num_packets_sent; 486 } 487 if (connection->address_type == BD_ADDR_TYPE_ACL){ 488 num_packets_sent_classic += connection->num_packets_sent; 489 } 490 } 491 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 492 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 493 int free_slots_le = 0; 494 495 if (free_slots_classic < 0){ 496 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); 497 return 0; 498 } 499 500 if (hci_stack->le_acl_packets_total_num){ 501 // if we have LE slots, they are used 502 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 503 if (free_slots_le < 0){ 504 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); 505 return 0; 506 } 507 } else { 508 // otherwise, classic slots are used for LE, too 509 free_slots_classic -= num_packets_sent_le; 510 if (free_slots_classic < 0){ 511 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); 512 return 0; 513 } 514 } 515 516 switch (address_type){ 517 case BD_ADDR_TYPE_UNKNOWN: 518 log_error("hci_number_free_acl_slots: unknown address type"); 519 return 0; 520 521 case BD_ADDR_TYPE_ACL: 522 return free_slots_classic; 523 524 default: 525 if (hci_stack->le_acl_packets_total_num){ 526 return free_slots_le; 527 } 528 return free_slots_classic; 529 } 530 } 531 532 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 533 // get connection type 534 hci_connection_t * connection = hci_connection_for_handle(con_handle); 535 if (!connection){ 536 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 537 return 0; 538 } 539 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 540 } 541 542 #ifdef ENABLE_CLASSIC 543 static int hci_number_free_sco_slots(void){ 544 unsigned int num_sco_packets_sent = 0; 545 btstack_linked_item_t *it; 546 if (hci_stack->synchronous_flow_control_enabled){ 547 // explicit flow control 548 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 549 hci_connection_t * connection = (hci_connection_t *) it; 550 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 551 num_sco_packets_sent += connection->num_packets_sent; 552 } 553 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 554 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 555 return 0; 556 } 557 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 558 } else { 559 // implicit flow control -- TODO 560 int num_ready = 0; 561 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 562 hci_connection_t * connection = (hci_connection_t *) it; 563 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 564 if (connection->sco_tx_ready == 0) continue; 565 num_ready++; 566 } 567 return num_ready; 568 } 569 } 570 #endif 571 572 // only used to send HCI Host Number Completed Packets 573 static int hci_can_send_comand_packet_transport(void){ 574 if (hci_stack->hci_packet_buffer_reserved) return 0; 575 576 // check for async hci transport implementations 577 if (hci_stack->hci_transport->can_send_packet_now){ 578 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 579 return 0; 580 } 581 } 582 return 1; 583 } 584 585 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 586 int hci_can_send_command_packet_now(void){ 587 if (hci_can_send_comand_packet_transport() == 0) return 0; 588 return hci_stack->num_cmd_packets > 0u; 589 } 590 591 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 592 // check for async hci transport implementations 593 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 594 return hci_stack->hci_transport->can_send_packet_now(packet_type); 595 } 596 597 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 598 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 599 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 600 } 601 602 int hci_can_send_acl_le_packet_now(void){ 603 if (hci_stack->hci_packet_buffer_reserved) return 0; 604 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 605 } 606 607 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 608 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 609 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 610 } 611 612 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 613 if (hci_stack->hci_packet_buffer_reserved) return 0; 614 return hci_can_send_prepared_acl_packet_now(con_handle); 615 } 616 617 #ifdef ENABLE_CLASSIC 618 int hci_can_send_acl_classic_packet_now(void){ 619 if (hci_stack->hci_packet_buffer_reserved) return 0; 620 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 621 } 622 623 int hci_can_send_prepared_sco_packet_now(void){ 624 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 625 if (hci_have_usb_transport()){ 626 return hci_stack->sco_can_send_now; 627 } else { 628 return hci_number_free_sco_slots() > 0; 629 } 630 } 631 632 int hci_can_send_sco_packet_now(void){ 633 if (hci_stack->hci_packet_buffer_reserved) return 0; 634 return hci_can_send_prepared_sco_packet_now(); 635 } 636 637 void hci_request_sco_can_send_now_event(void){ 638 hci_stack->sco_waiting_for_can_send_now = 1; 639 hci_notify_if_sco_can_send_now(); 640 } 641 #endif 642 643 // used for internal checks in l2cap.c 644 int hci_is_packet_buffer_reserved(void){ 645 return hci_stack->hci_packet_buffer_reserved; 646 } 647 648 // reserves outgoing packet buffer. @returns 1 if successful 649 int hci_reserve_packet_buffer(void){ 650 if (hci_stack->hci_packet_buffer_reserved) { 651 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 652 return 0; 653 } 654 hci_stack->hci_packet_buffer_reserved = 1; 655 return 1; 656 } 657 658 void hci_release_packet_buffer(void){ 659 hci_stack->hci_packet_buffer_reserved = 0; 660 } 661 662 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 663 static int hci_transport_synchronous(void){ 664 return hci_stack->hci_transport->can_send_packet_now == NULL; 665 } 666 667 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 668 669 // 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); 670 671 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 672 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 673 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 674 max_acl_data_packet_length = hci_stack->le_data_packets_length; 675 } 676 677 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 678 if (hci_is_le_connection(connection)){ 679 max_acl_data_packet_length = connection->le_max_tx_octets; 680 } 681 #endif 682 683 log_debug("hci_send_acl_packet_fragments entered"); 684 685 int err; 686 // multiple packets could be send on a synchronous HCI transport 687 while (true){ 688 689 log_debug("hci_send_acl_packet_fragments loop entered"); 690 691 // get current data 692 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 693 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 694 bool more_fragments = false; 695 696 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 697 if (current_acl_data_packet_length > max_acl_data_packet_length){ 698 more_fragments = true; 699 current_acl_data_packet_length = max_acl_data_packet_length; 700 } 701 702 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 703 if (acl_header_pos > 0u){ 704 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 705 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 706 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 707 } 708 709 // update header len 710 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 711 712 // count packet 713 connection->num_packets_sent++; 714 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 715 716 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 717 if (more_fragments){ 718 // update start of next fragment to send 719 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 720 } else { 721 // done 722 hci_stack->acl_fragmentation_pos = 0; 723 hci_stack->acl_fragmentation_total_size = 0; 724 } 725 726 // send packet 727 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 728 const int size = current_acl_data_packet_length + 4; 729 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 730 hci_stack->acl_fragmentation_tx_active = 1; 731 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 732 733 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 734 735 // done yet? 736 if (!more_fragments) break; 737 738 // can send more? 739 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 740 } 741 742 log_debug("hci_send_acl_packet_fragments loop over"); 743 744 // release buffer now for synchronous transport 745 if (hci_transport_synchronous()){ 746 hci_stack->acl_fragmentation_tx_active = 0; 747 hci_release_packet_buffer(); 748 hci_emit_transport_packet_sent(); 749 } 750 751 return err; 752 } 753 754 // pre: caller has reserved the packet buffer 755 int hci_send_acl_packet_buffer(int size){ 756 757 // log_info("hci_send_acl_packet_buffer size %u", size); 758 759 if (!hci_stack->hci_packet_buffer_reserved) { 760 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 761 return 0; 762 } 763 764 uint8_t * packet = hci_stack->hci_packet_buffer; 765 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 766 767 // check for free places on Bluetooth module 768 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 769 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 770 hci_release_packet_buffer(); 771 hci_emit_transport_packet_sent(); 772 return BTSTACK_ACL_BUFFERS_FULL; 773 } 774 775 hci_connection_t *connection = hci_connection_for_handle( con_handle); 776 if (!connection) { 777 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 778 hci_release_packet_buffer(); 779 hci_emit_transport_packet_sent(); 780 return 0; 781 } 782 783 #ifdef ENABLE_CLASSIC 784 hci_connection_timestamp(connection); 785 #endif 786 787 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 788 789 // setup data 790 hci_stack->acl_fragmentation_total_size = size; 791 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 792 793 return hci_send_acl_packet_fragments(connection); 794 } 795 796 #ifdef ENABLE_CLASSIC 797 // pre: caller has reserved the packet buffer 798 int hci_send_sco_packet_buffer(int size){ 799 800 // log_info("hci_send_acl_packet_buffer size %u", size); 801 802 if (!hci_stack->hci_packet_buffer_reserved) { 803 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 804 return 0; 805 } 806 807 uint8_t * packet = hci_stack->hci_packet_buffer; 808 809 // skip checks in loopback mode 810 if (!hci_stack->loopback_mode){ 811 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 812 813 // check for free places on Bluetooth module 814 if (!hci_can_send_prepared_sco_packet_now()) { 815 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 816 hci_release_packet_buffer(); 817 hci_emit_transport_packet_sent(); 818 return BTSTACK_ACL_BUFFERS_FULL; 819 } 820 821 // track send packet in connection struct 822 hci_connection_t *connection = hci_connection_for_handle( con_handle); 823 if (!connection) { 824 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 825 hci_release_packet_buffer(); 826 hci_emit_transport_packet_sent(); 827 return 0; 828 } 829 830 if (hci_have_usb_transport()){ 831 // token used 832 hci_stack->sco_can_send_now = 0; 833 } else { 834 if (hci_stack->synchronous_flow_control_enabled){ 835 connection->num_packets_sent++; 836 } else { 837 connection->sco_tx_ready--; 838 } 839 } 840 } 841 842 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 843 844 #ifdef HAVE_SCO_TRANSPORT 845 hci_stack->sco_transport->send_packet(packet, size); 846 hci_release_packet_buffer(); 847 hci_emit_transport_packet_sent(); 848 849 return 0; 850 #else 851 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 852 if (hci_transport_synchronous()){ 853 hci_release_packet_buffer(); 854 hci_emit_transport_packet_sent(); 855 } 856 857 return err; 858 #endif 859 } 860 #endif 861 862 static void acl_handler(uint8_t *packet, uint16_t size){ 863 864 // get info 865 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 866 hci_connection_t *conn = hci_connection_for_handle(con_handle); 867 uint8_t acl_flags = READ_ACL_FLAGS(packet); 868 uint16_t acl_length = READ_ACL_LENGTH(packet); 869 870 // ignore non-registered handle 871 if (!conn){ 872 log_error("acl_handler called with non-registered handle %u!" , con_handle); 873 return; 874 } 875 876 // assert packet is complete 877 if ((acl_length + 4u) != size){ 878 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 879 return; 880 } 881 882 #ifdef ENABLE_CLASSIC 883 // update idle timestamp 884 hci_connection_timestamp(conn); 885 #endif 886 887 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 888 hci_stack->host_completed_packets = 1; 889 conn->num_packets_completed++; 890 #endif 891 892 // handle different packet types 893 switch (acl_flags & 0x03u) { 894 895 case 0x01: // continuation fragment 896 897 // sanity checks 898 if (conn->acl_recombination_pos == 0u) { 899 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 900 return; 901 } 902 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 903 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 904 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 905 conn->acl_recombination_pos = 0; 906 return; 907 } 908 909 // append fragment payload (header already stored) 910 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 911 &packet[4], acl_length); 912 conn->acl_recombination_pos += acl_length; 913 914 // forward complete L2CAP packet if complete. 915 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 916 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 917 // reset recombination buffer 918 conn->acl_recombination_length = 0; 919 conn->acl_recombination_pos = 0; 920 } 921 break; 922 923 case 0x02: { // first fragment 924 925 // sanity check 926 if (conn->acl_recombination_pos) { 927 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 928 conn->acl_recombination_pos = 0; 929 } 930 931 // peek into L2CAP packet! 932 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 933 934 // compare fragment size to L2CAP packet size 935 if (acl_length >= (l2cap_length + 4u)){ 936 // forward fragment as L2CAP packet 937 hci_emit_acl_packet(packet, acl_length + 4u); 938 } else { 939 940 if (acl_length > HCI_ACL_BUFFER_SIZE){ 941 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 942 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 943 return; 944 } 945 946 // store first fragment and tweak acl length for complete package 947 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 948 packet, acl_length + 4u); 949 conn->acl_recombination_pos = acl_length + 4u; 950 conn->acl_recombination_length = l2cap_length; 951 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 952 } 953 break; 954 955 } 956 default: 957 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 958 return; 959 } 960 961 // execute main loop 962 hci_run(); 963 } 964 965 static void hci_shutdown_connection(hci_connection_t *conn){ 966 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 967 968 #ifdef ENABLE_CLASSIC 969 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 970 bd_addr_type_t addr_type = conn->address_type; 971 #endif 972 #ifdef HAVE_SCO_TRANSPORT 973 hci_con_handle_t con_handle = conn->con_handle; 974 #endif 975 #endif 976 977 btstack_run_loop_remove_timer(&conn->timeout); 978 979 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 980 btstack_memory_hci_connection_free( conn ); 981 982 // now it's gone 983 hci_emit_nr_connections_changed(); 984 985 #ifdef ENABLE_CLASSIC 986 #ifdef ENABLE_SCO_OVER_HCI 987 // update SCO 988 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 989 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 990 } 991 #endif 992 #ifdef HAVE_SCO_TRANSPORT 993 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 994 hci_stack->sco_transport->close(con_handle); 995 } 996 #endif 997 #endif 998 } 999 1000 #ifdef ENABLE_CLASSIC 1001 1002 static const uint16_t packet_type_sizes[] = { 1003 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1004 HCI_ACL_DH1_SIZE, 0, 0, 0, 1005 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1006 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1007 }; 1008 static const uint8_t packet_type_feature_requirement_bit[] = { 1009 0, // 3 slot packets 1010 1, // 5 slot packets 1011 25, // EDR 2 mpbs 1012 26, // EDR 3 mbps 1013 39, // 3 slot EDR packts 1014 40, // 5 slot EDR packet 1015 }; 1016 static const uint16_t packet_type_feature_packet_mask[] = { 1017 0x0f00, // 3 slot packets 1018 0xf000, // 5 slot packets 1019 0x1102, // EDR 2 mpbs 1020 0x2204, // EDR 3 mbps 1021 0x0300, // 3 slot EDR packts 1022 0x3000, // 5 slot EDR packet 1023 }; 1024 1025 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1026 // enable packet types based on size 1027 uint16_t packet_types = 0; 1028 unsigned int i; 1029 for (i=0;i<16;i++){ 1030 if (packet_type_sizes[i] == 0) continue; 1031 if (packet_type_sizes[i] <= buffer_size){ 1032 packet_types |= 1 << i; 1033 } 1034 } 1035 // disable packet types due to missing local supported features 1036 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1037 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1038 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1039 if (feature_set) continue; 1040 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1041 packet_types &= ~packet_type_feature_packet_mask[i]; 1042 } 1043 // flip bits for "may not be used" 1044 packet_types ^= 0x3306; 1045 return packet_types; 1046 } 1047 1048 uint16_t hci_usable_acl_packet_types(void){ 1049 return hci_stack->packet_types; 1050 } 1051 #endif 1052 1053 uint8_t* hci_get_outgoing_packet_buffer(void){ 1054 // hci packet buffer is >= acl data packet length 1055 return hci_stack->hci_packet_buffer; 1056 } 1057 1058 uint16_t hci_max_acl_data_packet_length(void){ 1059 return hci_stack->acl_data_packet_length; 1060 } 1061 1062 #ifdef ENABLE_CLASSIC 1063 int hci_extended_sco_link_supported(void){ 1064 // No. 31, byte 3, bit 7 1065 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1066 } 1067 #endif 1068 1069 int hci_non_flushable_packet_boundary_flag_supported(void){ 1070 // No. 54, byte 6, bit 6 1071 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1072 } 1073 1074 static int gap_ssp_supported(void){ 1075 // No. 51, byte 6, bit 3 1076 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1077 } 1078 1079 static int hci_classic_supported(void){ 1080 #ifdef ENABLE_CLASSIC 1081 // No. 37, byte 4, bit 5, = No BR/EDR Support 1082 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1083 #else 1084 return 0; 1085 #endif 1086 } 1087 1088 static int hci_le_supported(void){ 1089 #ifdef ENABLE_BLE 1090 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1091 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1092 #else 1093 return 0; 1094 #endif 1095 } 1096 1097 #ifdef ENABLE_BLE 1098 1099 /** 1100 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1101 */ 1102 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1103 *addr_type = hci_stack->le_own_addr_type; 1104 if (hci_stack->le_own_addr_type){ 1105 (void)memcpy(addr, hci_stack->le_random_address, 6); 1106 } else { 1107 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1108 } 1109 } 1110 1111 #ifdef ENABLE_LE_CENTRAL 1112 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1113 1114 int offset = 3; 1115 int num_reports = packet[offset]; 1116 offset += 1; 1117 1118 int i; 1119 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1120 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1121 for (i=0; (i<num_reports) && (offset < size);i++){ 1122 // sanity checks on data_length: 1123 uint8_t data_length = packet[offset + 8]; 1124 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1125 if ((offset + 9u + data_length + 1u) > size) return; 1126 // setup event 1127 uint8_t event_size = 10u + data_length; 1128 int pos = 0; 1129 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1130 event[pos++] = event_size; 1131 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1132 offset += 8; 1133 pos += 8; 1134 event[pos++] = packet[offset + 1 + data_length]; // rssi 1135 event[pos++] = data_length; 1136 offset++; 1137 (void)memcpy(&event[pos], &packet[offset], data_length); 1138 pos += data_length; 1139 offset += data_length + 1u; // rssi 1140 hci_emit_event(event, pos, 1); 1141 } 1142 } 1143 #endif 1144 #endif 1145 1146 #ifdef ENABLE_BLE 1147 #ifdef ENABLE_LE_PERIPHERAL 1148 static void hci_update_advertisements_enabled_for_current_roles(void){ 1149 if (hci_stack->le_advertisements_enabled){ 1150 // get number of active le slave connections 1151 int num_slave_connections = 0; 1152 btstack_linked_list_iterator_t it; 1153 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1154 while (btstack_linked_list_iterator_has_next(&it)){ 1155 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1156 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1157 if (con->state != OPEN) continue; 1158 if (con->role != HCI_ROLE_SLAVE) continue; 1159 if (!hci_is_le_connection(con)) continue; 1160 num_slave_connections++; 1161 } 1162 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1163 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1164 } else { 1165 hci_stack->le_advertisements_enabled_for_current_roles = false; 1166 } 1167 } 1168 #endif 1169 #endif 1170 1171 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1172 1173 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1174 if (!hci_stack->config) return 0; 1175 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1176 // Limit baud rate for Broadcom chipsets to 3 mbps 1177 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1178 baud_rate = 3000000; 1179 } 1180 return baud_rate; 1181 } 1182 1183 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1184 UNUSED(ds); 1185 1186 switch (hci_stack->substate){ 1187 case HCI_INIT_W4_SEND_RESET: 1188 log_info("Resend HCI Reset"); 1189 hci_stack->substate = HCI_INIT_SEND_RESET; 1190 hci_stack->num_cmd_packets = 1; 1191 hci_run(); 1192 break; 1193 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1194 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1195 if (hci_stack->hci_transport->reset_link){ 1196 hci_stack->hci_transport->reset_link(); 1197 } 1198 1199 /* fall through */ 1200 1201 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1202 log_info("Resend HCI Reset - CSR Warm Boot"); 1203 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1204 hci_stack->num_cmd_packets = 1; 1205 hci_run(); 1206 break; 1207 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1208 if (hci_stack->hci_transport->set_baudrate){ 1209 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1210 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1211 hci_stack->hci_transport->set_baudrate(baud_rate); 1212 } 1213 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1214 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1215 if (hci_stack->hci_transport->reset_link){ 1216 log_info("Link Reset"); 1217 hci_stack->hci_transport->reset_link(); 1218 } 1219 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1220 hci_run(); 1221 } 1222 break; 1223 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1224 // otherwise continue 1225 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1226 hci_send_cmd(&hci_read_local_supported_commands); 1227 break; 1228 default: 1229 break; 1230 } 1231 } 1232 #endif 1233 1234 static void hci_initializing_next_state(void){ 1235 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1236 } 1237 1238 // assumption: hci_can_send_command_packet_now() == true 1239 static void hci_initializing_run(void){ 1240 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1241 switch (hci_stack->substate){ 1242 case HCI_INIT_SEND_RESET: 1243 hci_state_reset(); 1244 1245 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1246 // prepare reset if command complete not received in 100ms 1247 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1248 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1249 btstack_run_loop_add_timer(&hci_stack->timeout); 1250 #endif 1251 // send command 1252 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1253 hci_send_cmd(&hci_reset); 1254 break; 1255 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1256 hci_send_cmd(&hci_read_local_version_information); 1257 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1258 break; 1259 case HCI_INIT_SEND_READ_LOCAL_NAME: 1260 hci_send_cmd(&hci_read_local_name); 1261 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1262 break; 1263 1264 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1265 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1266 hci_state_reset(); 1267 // prepare reset if command complete not received in 100ms 1268 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1269 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1270 btstack_run_loop_add_timer(&hci_stack->timeout); 1271 // send command 1272 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1273 hci_send_cmd(&hci_reset); 1274 break; 1275 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1276 hci_state_reset(); 1277 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1278 hci_send_cmd(&hci_reset); 1279 break; 1280 case HCI_INIT_SEND_BAUD_CHANGE: { 1281 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1282 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1283 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1284 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1285 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1286 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1287 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1288 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1289 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1290 btstack_run_loop_add_timer(&hci_stack->timeout); 1291 } 1292 break; 1293 } 1294 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1295 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1296 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1297 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1298 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1299 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1300 break; 1301 } 1302 case HCI_INIT_CUSTOM_INIT: 1303 // Custom initialization 1304 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1305 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1306 bool send_cmd = false; 1307 switch (hci_stack->chipset_result){ 1308 case BTSTACK_CHIPSET_VALID_COMMAND: 1309 send_cmd = true; 1310 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1311 break; 1312 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1313 send_cmd = true; 1314 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1315 log_info("CSR Warm Boot"); 1316 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1317 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1318 btstack_run_loop_add_timer(&hci_stack->timeout); 1319 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1320 && hci_stack->config 1321 && hci_stack->chipset 1322 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1323 && hci_stack->hci_transport->set_baudrate 1324 && hci_transport_uart_get_main_baud_rate()){ 1325 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1326 } else { 1327 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1328 } 1329 break; 1330 default: 1331 break; 1332 } 1333 1334 if (send_cmd){ 1335 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1336 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1337 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1338 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1339 break; 1340 } 1341 log_info("Init script done"); 1342 1343 // Init script download on Broadcom chipsets causes: 1344 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1345 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1346 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1347 1348 // - baud rate to reset, restore UART baud rate if needed 1349 int need_baud_change = hci_stack->config 1350 && hci_stack->chipset 1351 && hci_stack->chipset->set_baudrate_command 1352 && hci_stack->hci_transport->set_baudrate 1353 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1354 if (need_baud_change) { 1355 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1356 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1357 hci_stack->hci_transport->set_baudrate(baud_rate); 1358 } 1359 1360 uint16_t bcm_delay_ms = 300; 1361 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1362 // -> Work around: wait here. 1363 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1364 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1365 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1366 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1367 btstack_run_loop_add_timer(&hci_stack->timeout); 1368 break; 1369 } 1370 } 1371 // otherwise continue 1372 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1373 hci_send_cmd(&hci_read_local_supported_commands); 1374 break; 1375 case HCI_INIT_SET_BD_ADDR: 1376 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1377 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1378 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1379 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1380 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1381 break; 1382 #endif 1383 1384 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1385 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1386 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1387 hci_send_cmd(&hci_read_local_supported_commands); 1388 break; 1389 case HCI_INIT_READ_BD_ADDR: 1390 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1391 hci_send_cmd(&hci_read_bd_addr); 1392 break; 1393 case HCI_INIT_READ_BUFFER_SIZE: 1394 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1395 hci_send_cmd(&hci_read_buffer_size); 1396 break; 1397 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1398 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1399 hci_send_cmd(&hci_read_local_supported_features); 1400 break; 1401 1402 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1403 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1404 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1405 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1406 break; 1407 case HCI_INIT_HOST_BUFFER_SIZE: 1408 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1409 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1410 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1411 break; 1412 #endif 1413 1414 case HCI_INIT_SET_EVENT_MASK: 1415 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1416 if (hci_le_supported()){ 1417 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1418 } else { 1419 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1420 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1421 } 1422 break; 1423 1424 #ifdef ENABLE_CLASSIC 1425 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1426 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1427 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1428 break; 1429 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1430 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1431 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1432 break; 1433 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1434 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1435 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1436 break; 1437 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1438 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1439 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1440 break; 1441 case HCI_INIT_WRITE_LOCAL_NAME: { 1442 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1443 hci_reserve_packet_buffer(); 1444 uint8_t * packet = hci_stack->hci_packet_buffer; 1445 // construct HCI Command and send 1446 uint16_t opcode = hci_write_local_name.opcode; 1447 hci_stack->last_cmd_opcode = opcode; 1448 packet[0] = opcode & 0xff; 1449 packet[1] = opcode >> 8; 1450 packet[2] = DEVICE_NAME_LEN; 1451 memset(&packet[3], 0, DEVICE_NAME_LEN); 1452 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1453 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1454 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1455 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1456 // expand '00:00:00:00:00:00' in name with bd_addr 1457 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1458 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1459 break; 1460 } 1461 case HCI_INIT_WRITE_EIR_DATA: { 1462 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1463 hci_reserve_packet_buffer(); 1464 uint8_t * packet = hci_stack->hci_packet_buffer; 1465 // construct HCI Command in-place and send 1466 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1467 hci_stack->last_cmd_opcode = opcode; 1468 uint16_t offset = 0; 1469 packet[offset++] = opcode & 0xff; 1470 packet[offset++] = opcode >> 8; 1471 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1472 packet[offset++] = 0; // FEC not required 1473 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1474 if (hci_stack->eir_data){ 1475 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1476 ad_context_t context; 1477 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1478 uint8_t data_type = ad_iterator_get_data_type(&context); 1479 uint8_t size = ad_iterator_get_data_len(&context); 1480 const uint8_t *data = ad_iterator_get_data(&context); 1481 // copy item 1482 packet[offset++] = size + 1; 1483 packet[offset++] = data_type; 1484 memcpy(&packet[offset], data, size); 1485 // update name item 1486 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1487 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1488 } 1489 offset += size; 1490 } 1491 } else { 1492 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1493 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1494 packet[offset++] = bytes_to_copy + 1; 1495 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1496 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1497 // expand '00:00:00:00:00:00' in name with bd_addr 1498 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1499 } 1500 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1501 break; 1502 } 1503 case HCI_INIT_WRITE_INQUIRY_MODE: 1504 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1505 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1506 break; 1507 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1508 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1509 hci_stack->secure_connections_active = true; 1510 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1511 break; 1512 case HCI_INIT_WRITE_SCAN_ENABLE: 1513 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1514 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1515 break; 1516 // only sent if ENABLE_SCO_OVER_HCI is defined 1517 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1518 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1519 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1520 break; 1521 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1522 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1523 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1524 break; 1525 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1526 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1527 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1528 #ifdef ENABLE_SCO_OVER_HCI 1529 log_info("BCM: Route SCO data via HCI transport"); 1530 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1531 #endif 1532 #ifdef ENABLE_SCO_OVER_PCM 1533 log_info("BCM: Route SCO data via PCM interface"); 1534 #ifdef ENABLE_BCM_PCM_WBS 1535 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1536 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1537 #else 1538 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1539 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1540 #endif 1541 #endif 1542 break; 1543 #ifdef ENABLE_SCO_OVER_PCM 1544 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1545 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1546 log_info("BCM: Config PCM interface for I2S"); 1547 #ifdef ENABLE_BCM_PCM_WBS 1548 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1549 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1550 #else 1551 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1552 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1553 #endif 1554 break; 1555 #endif 1556 #endif 1557 1558 #ifdef ENABLE_BLE 1559 // LE INIT 1560 case HCI_INIT_LE_READ_BUFFER_SIZE: 1561 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1562 hci_send_cmd(&hci_le_read_buffer_size); 1563 break; 1564 case HCI_INIT_LE_SET_EVENT_MASK: 1565 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1566 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1567 break; 1568 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1569 // LE Supported Host = 1, Simultaneous Host = 0 1570 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1571 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1572 break; 1573 #endif 1574 1575 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1576 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1577 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1578 hci_send_cmd(&hci_le_read_maximum_data_length); 1579 break; 1580 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1581 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1582 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1583 break; 1584 #endif 1585 1586 #ifdef ENABLE_LE_CENTRAL 1587 case HCI_INIT_READ_WHITE_LIST_SIZE: 1588 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1589 hci_send_cmd(&hci_le_read_white_list_size); 1590 break; 1591 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1592 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1593 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); 1594 break; 1595 #endif 1596 default: 1597 return; 1598 } 1599 } 1600 1601 static void hci_init_done(void){ 1602 // done. tell the app 1603 log_info("hci_init_done -> HCI_STATE_WORKING"); 1604 hci_stack->state = HCI_STATE_WORKING; 1605 hci_emit_state(); 1606 hci_run(); 1607 } 1608 1609 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1610 bool command_completed = false; 1611 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1612 uint16_t opcode = little_endian_read_16(packet,3); 1613 if (opcode == hci_stack->last_cmd_opcode){ 1614 command_completed = true; 1615 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1616 } else { 1617 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1618 } 1619 } 1620 1621 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1622 uint8_t status = packet[2]; 1623 uint16_t opcode = little_endian_read_16(packet,4); 1624 if (opcode == hci_stack->last_cmd_opcode){ 1625 if (status){ 1626 command_completed = true; 1627 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1628 } else { 1629 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1630 } 1631 } else { 1632 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1633 } 1634 } 1635 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1636 // Vendor == CSR 1637 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1638 // TODO: track actual command 1639 command_completed = true; 1640 } 1641 1642 // Vendor == Toshiba 1643 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1644 // TODO: track actual command 1645 command_completed = true; 1646 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1647 hci_stack->num_cmd_packets = 1; 1648 } 1649 #endif 1650 1651 return command_completed; 1652 } 1653 1654 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1655 1656 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1657 1658 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1659 1660 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1661 1662 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1663 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1664 // 1665 // HCI Reset 1666 // Timeout 100 ms 1667 // HCI Reset 1668 // Command Complete Reset 1669 // HCI Read Local Version Information 1670 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1671 // hang... 1672 // 1673 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1674 if (!command_completed 1675 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1676 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1677 1678 uint16_t opcode = little_endian_read_16(packet,3); 1679 if (opcode == hci_reset.opcode){ 1680 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1681 return; 1682 } 1683 } 1684 1685 // CSR & H5 1686 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1687 if (!command_completed 1688 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1689 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1690 1691 uint16_t opcode = little_endian_read_16(packet,3); 1692 if (opcode == hci_reset.opcode){ 1693 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1694 return; 1695 } 1696 } 1697 1698 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1699 // fix: Correct substate and behave as command below 1700 if (command_completed){ 1701 switch (hci_stack->substate){ 1702 case HCI_INIT_SEND_RESET: 1703 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1704 break; 1705 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1706 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1707 break; 1708 default: 1709 break; 1710 } 1711 } 1712 1713 #endif 1714 1715 if (!command_completed) return; 1716 1717 bool need_baud_change = false; 1718 bool need_addr_change = false; 1719 1720 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1721 need_baud_change = hci_stack->config 1722 && hci_stack->chipset 1723 && hci_stack->chipset->set_baudrate_command 1724 && hci_stack->hci_transport->set_baudrate 1725 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1726 1727 need_addr_change = hci_stack->custom_bd_addr_set 1728 && hci_stack->chipset 1729 && hci_stack->chipset->set_bd_addr_command; 1730 #endif 1731 1732 switch(hci_stack->substate){ 1733 1734 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1735 case HCI_INIT_SEND_RESET: 1736 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1737 // fix: just correct substate and behave as command below 1738 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1739 btstack_run_loop_remove_timer(&hci_stack->timeout); 1740 break; 1741 case HCI_INIT_W4_SEND_RESET: 1742 btstack_run_loop_remove_timer(&hci_stack->timeout); 1743 break; 1744 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1745 log_info("Received local name, need baud change %d", (int) need_baud_change); 1746 if (need_baud_change){ 1747 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1748 return; 1749 } 1750 // skip baud change 1751 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1752 return; 1753 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1754 // for STLC2500D, baud rate change already happened. 1755 // for others, baud rate gets changed now 1756 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1757 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1758 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1759 hci_stack->hci_transport->set_baudrate(baud_rate); 1760 } 1761 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1762 return; 1763 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1764 btstack_run_loop_remove_timer(&hci_stack->timeout); 1765 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1766 return; 1767 case HCI_INIT_W4_CUSTOM_INIT: 1768 // repeat custom init 1769 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1770 return; 1771 #else 1772 case HCI_INIT_W4_SEND_RESET: 1773 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1774 return ; 1775 #endif 1776 1777 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1778 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1779 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1780 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1781 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1782 return; 1783 } 1784 if (need_addr_change){ 1785 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1786 return; 1787 } 1788 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1789 return; 1790 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1791 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1792 if (need_baud_change){ 1793 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1794 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1795 hci_stack->hci_transport->set_baudrate(baud_rate); 1796 } 1797 if (need_addr_change){ 1798 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1799 return; 1800 } 1801 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1802 return; 1803 case HCI_INIT_W4_SET_BD_ADDR: 1804 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1805 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1806 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1807 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1808 return; 1809 } 1810 // skipping st warm boot 1811 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1812 return; 1813 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1814 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1815 return; 1816 #endif 1817 case HCI_INIT_W4_READ_BD_ADDR: 1818 // only read buffer size if supported 1819 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1820 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1821 return; 1822 } 1823 // skipping read buffer size 1824 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1825 return; 1826 case HCI_INIT_W4_SET_EVENT_MASK: 1827 // skip Classic init commands for LE only chipsets 1828 if (!hci_classic_supported()){ 1829 #ifdef ENABLE_BLE 1830 if (hci_le_supported()){ 1831 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1832 return; 1833 } 1834 #endif 1835 log_error("Neither BR/EDR nor LE supported"); 1836 hci_init_done(); 1837 return; 1838 } 1839 if (!gap_ssp_supported()){ 1840 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1841 return; 1842 } 1843 break; 1844 #ifdef ENABLE_BLE 1845 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1846 // skip write le host if not supported (e.g. on LE only EM9301) 1847 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1848 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1849 return; 1850 1851 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1852 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1853 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1854 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1855 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1856 return; 1857 } 1858 // explicit fall through to reduce repetitions 1859 1860 #ifdef ENABLE_LE_CENTRAL 1861 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1862 #else 1863 hci_init_done(); 1864 #endif 1865 return; 1866 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1867 1868 #endif /* ENABLE_BLE */ 1869 1870 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1871 // skip write secure connections host support if not supported or disabled 1872 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1873 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1874 return; 1875 } 1876 break; 1877 1878 #ifdef ENABLE_SCO_OVER_HCI 1879 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1880 // skip write synchronous flow control if not supported 1881 if (hci_stack->local_supported_commands[0] & 0x04) break; 1882 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1883 1884 /* fall through */ 1885 1886 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1887 // skip write default erroneous data reporting if not supported 1888 if (hci_stack->local_supported_commands[0] & 0x08) break; 1889 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1890 1891 /* fall through */ 1892 1893 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1894 // skip bcm set sco pcm config on non-Broadcom chipsets 1895 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1896 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1897 1898 /* fall through */ 1899 1900 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1901 if (!hci_le_supported()){ 1902 // SKIP LE init for Classic only configuration 1903 hci_init_done(); 1904 return; 1905 } 1906 break; 1907 1908 #else /* !ENABLE_SCO_OVER_HCI */ 1909 1910 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1911 #ifdef ENABLE_SCO_OVER_PCM 1912 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1913 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1914 return; 1915 } 1916 #endif 1917 /* fall through */ 1918 1919 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1920 #ifdef ENABLE_BLE 1921 if (hci_le_supported()){ 1922 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1923 return; 1924 } 1925 #endif 1926 // SKIP LE init for Classic only configuration 1927 hci_init_done(); 1928 return; 1929 #endif /* ENABLE_SCO_OVER_HCI */ 1930 1931 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1932 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1933 // Response to command before init done state -> init done 1934 case (HCI_INIT_DONE-1): 1935 hci_init_done(); 1936 return; 1937 #endif 1938 1939 default: 1940 break; 1941 } 1942 hci_initializing_next_state(); 1943 } 1944 1945 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1946 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1947 bd_addr_t bd_address; 1948 (void)memcpy(&bd_address, conn->address, 6); 1949 1950 #ifdef ENABLE_CLASSIC 1951 // cache needed data 1952 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1953 #endif 1954 1955 // connection failed, remove entry 1956 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1957 btstack_memory_hci_connection_free( conn ); 1958 1959 #ifdef ENABLE_CLASSIC 1960 // notify client if dedicated bonding 1961 if (notify_dedicated_bonding_failed){ 1962 log_info("hci notify_dedicated_bonding_failed"); 1963 hci_emit_dedicated_bonding_result(bd_address, status); 1964 } 1965 1966 // if authentication error, also delete link key 1967 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1968 gap_drop_link_key_for_bd_addr(bd_address); 1969 } 1970 #else 1971 UNUSED(status); 1972 #endif 1973 } 1974 1975 #ifdef ENABLE_CLASSIC 1976 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1977 // SSP Controller 1978 if (features[6] & (1 << 3)){ 1979 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1980 } 1981 // eSCO 1982 if (features[3] & (1<<7)){ 1983 conn->remote_supported_features[0] |= 1; 1984 } 1985 // Extended features 1986 if (features[7] & (1<<7)){ 1987 conn->remote_supported_features[0] |= 2; 1988 } 1989 } 1990 1991 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1992 // SSP Host 1993 if (features[0] & (1 << 0)){ 1994 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1995 } 1996 // SC Host 1997 if (features[0] & (1 << 3)){ 1998 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 1999 } 2000 } 2001 2002 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2003 // SC Controller 2004 if (features[1] & (1 << 0)){ 2005 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2006 } 2007 } 2008 2009 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2010 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2011 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2012 if (conn->bonding_flags & BONDING_DEDICATED){ 2013 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2014 } 2015 } 2016 #endif 2017 2018 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2019 // handle BT initialization 2020 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2021 hci_initializing_event_handler(packet, size); 2022 } 2023 2024 // help with BT sleep 2025 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2026 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2027 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2028 hci_initializing_next_state(); 2029 } 2030 } 2031 2032 #ifdef ENABLE_CLASSIC 2033 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2034 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2035 conn->encryption_key_size = encryption_key_size; 2036 2037 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 2038 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2039 return; 2040 } 2041 2042 // Request Authentication if not already done 2043 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2044 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2045 } 2046 #endif 2047 2048 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2049 UNUSED(size); 2050 2051 uint16_t manufacturer; 2052 #ifdef ENABLE_CLASSIC 2053 hci_con_handle_t handle; 2054 hci_connection_t * conn; 2055 uint8_t status; 2056 #endif 2057 // get num cmd packets - limit to 1 to reduce complexity 2058 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2059 2060 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2061 switch (opcode){ 2062 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2063 if (packet[5]) break; 2064 // terminate, name 248 chars 2065 packet[6+248] = 0; 2066 log_info("local name: %s", &packet[6]); 2067 break; 2068 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2069 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2070 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2071 uint16_t acl_len = little_endian_read_16(packet, 6); 2072 uint16_t sco_len = packet[8]; 2073 2074 // determine usable ACL/SCO payload size 2075 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2076 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2077 2078 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2079 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2080 2081 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2082 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2083 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2084 } 2085 break; 2086 case HCI_OPCODE_HCI_READ_RSSI: 2087 if (packet[5] == ERROR_CODE_SUCCESS){ 2088 uint8_t event[5]; 2089 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2090 event[1] = 3; 2091 (void)memcpy(&event[2], &packet[6], 3); 2092 hci_emit_event(event, sizeof(event), 1); 2093 } 2094 break; 2095 #ifdef ENABLE_BLE 2096 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2097 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2098 hci_stack->le_acl_packets_total_num = packet[8]; 2099 // determine usable ACL payload size 2100 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2101 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2102 } 2103 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2104 break; 2105 #endif 2106 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2107 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2108 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2109 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2110 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); 2111 break; 2112 #endif 2113 #ifdef ENABLE_LE_CENTRAL 2114 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2115 hci_stack->le_whitelist_capacity = packet[6]; 2116 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2117 break; 2118 #endif 2119 case HCI_OPCODE_HCI_READ_BD_ADDR: 2120 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2121 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)); 2122 #ifdef ENABLE_CLASSIC 2123 if (hci_stack->link_key_db){ 2124 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2125 } 2126 #endif 2127 break; 2128 #ifdef ENABLE_CLASSIC 2129 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2130 hci_emit_discoverable_enabled(hci_stack->discoverable); 2131 break; 2132 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2133 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2134 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2135 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2136 hci_emit_event(event, sizeof(event), 1); 2137 } 2138 break; 2139 #endif 2140 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2141 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2142 2143 #ifdef ENABLE_CLASSIC 2144 // determine usable ACL packet types based on host buffer size and supported features 2145 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2146 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2147 #endif 2148 // Classic/LE 2149 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2150 break; 2151 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2152 manufacturer = little_endian_read_16(packet, 10); 2153 // map Cypress to Broadcom 2154 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2155 log_info("Treat Cypress as Broadcom"); 2156 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2157 little_endian_store_16(packet, 10, manufacturer); 2158 } 2159 hci_stack->manufacturer = manufacturer; 2160 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2161 break; 2162 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2163 hci_stack->local_supported_commands[0] = 2164 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2165 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2166 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2167 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2168 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2169 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2170 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2171 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2172 hci_stack->local_supported_commands[1] = 2173 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2174 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2175 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2176 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2177 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2178 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2179 break; 2180 #ifdef ENABLE_CLASSIC 2181 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2182 if (packet[5]) return; 2183 hci_stack->synchronous_flow_control_enabled = 1; 2184 break; 2185 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2186 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2187 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2188 conn = hci_connection_for_handle(handle); 2189 if (conn != NULL) { 2190 uint8_t key_size = 0; 2191 if (status == 0){ 2192 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2193 log_info("Handle %04x key Size: %u", handle, key_size); 2194 } else { 2195 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2196 } 2197 hci_handle_read_encryption_key_size_complete(conn, key_size); 2198 } 2199 break; 2200 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2201 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2202 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2203 uint8_t event[67]; 2204 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2205 event[1] = 65; 2206 (void)memset(&event[2], 0, 65); 2207 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2208 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2209 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2210 event[2] = 3; 2211 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2212 } else { 2213 event[2] = 1; 2214 } 2215 } 2216 hci_emit_event(event, sizeof(event), 0); 2217 break; 2218 } 2219 #endif 2220 #endif 2221 default: 2222 break; 2223 } 2224 } 2225 2226 #ifdef ENABLE_BLE 2227 static void event_handle_le_connection_complete(const uint8_t * packet){ 2228 bd_addr_t addr; 2229 bd_addr_type_t addr_type; 2230 hci_connection_t * conn; 2231 2232 // Connection management 2233 reverse_bd_addr(&packet[8], addr); 2234 addr_type = (bd_addr_type_t)packet[7]; 2235 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2236 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2237 2238 #ifdef ENABLE_LE_CENTRAL 2239 // handle error: error is reported only to the initiator -> outgoing connection 2240 if (packet[3]){ 2241 2242 // handle cancelled outgoing connection 2243 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2244 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2245 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2246 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2247 // whitelist connect 2248 if (hci_is_le_connection_type(addr_type)){ 2249 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2250 } 2251 // get outgoing connection conn struct for direct connect 2252 conn = gap_get_outgoing_connection(); 2253 } 2254 2255 // outgoing le connection establishment is done 2256 if (conn){ 2257 // remove entry 2258 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2259 btstack_memory_hci_connection_free( conn ); 2260 } 2261 return; 2262 } 2263 #endif 2264 2265 // on success, both hosts receive connection complete event 2266 if (packet[6] == HCI_ROLE_MASTER){ 2267 #ifdef ENABLE_LE_CENTRAL 2268 // if we're master on an le connection, it was an outgoing connection and we're done with it 2269 // note: no hci_connection_t object exists yet for connect with whitelist 2270 if (hci_is_le_connection_type(addr_type)){ 2271 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2272 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2273 } 2274 #endif 2275 } else { 2276 #ifdef ENABLE_LE_PERIPHERAL 2277 // if we're slave, it was an incoming connection, advertisements have stopped 2278 hci_stack->le_advertisements_active = false; 2279 #endif 2280 } 2281 2282 // LE connections are auto-accepted, so just create a connection if there isn't one already 2283 if (!conn){ 2284 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2285 } 2286 2287 // no memory, sorry. 2288 if (!conn){ 2289 return; 2290 } 2291 2292 conn->state = OPEN; 2293 conn->role = packet[6]; 2294 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2295 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2296 2297 #ifdef ENABLE_LE_PERIPHERAL 2298 if (packet[6] == HCI_ROLE_SLAVE){ 2299 hci_update_advertisements_enabled_for_current_roles(); 2300 } 2301 #endif 2302 2303 // init unenhanced att bearer mtu 2304 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2305 conn->att_connection.mtu_exchanged = false; 2306 2307 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2308 2309 // restart timer 2310 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2311 // btstack_run_loop_add_timer(&conn->timeout); 2312 2313 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2314 2315 hci_emit_nr_connections_changed(); 2316 } 2317 #endif 2318 2319 static void event_handler(uint8_t *packet, uint16_t size){ 2320 2321 uint16_t event_length = packet[1]; 2322 2323 // assert packet is complete 2324 if (size != (event_length + 2u)){ 2325 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2326 return; 2327 } 2328 2329 bd_addr_type_t addr_type; 2330 hci_con_handle_t handle; 2331 hci_connection_t * conn; 2332 int i; 2333 int create_connection_cmd; 2334 2335 #ifdef ENABLE_CLASSIC 2336 hci_link_type_t link_type; 2337 bd_addr_t addr; 2338 #endif 2339 2340 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2341 2342 switch (hci_event_packet_get_type(packet)) { 2343 2344 case HCI_EVENT_COMMAND_COMPLETE: 2345 handle_command_complete_event(packet, size); 2346 break; 2347 2348 case HCI_EVENT_COMMAND_STATUS: 2349 // get num cmd packets - limit to 1 to reduce complexity 2350 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2351 2352 // check command status to detected failed outgoing connections 2353 create_connection_cmd = 0; 2354 #ifdef ENABLE_CLASSIC 2355 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2356 create_connection_cmd = 1; 2357 } 2358 #endif 2359 #ifdef ENABLE_LE_CENTRAL 2360 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2361 create_connection_cmd = 1; 2362 } 2363 #endif 2364 if (create_connection_cmd) { 2365 uint8_t status = hci_event_command_status_get_status(packet); 2366 addr_type = hci_stack->outgoing_addr_type; 2367 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2368 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); 2369 2370 // reset outgoing address info 2371 memset(hci_stack->outgoing_addr, 0, 6); 2372 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2373 2374 // on error 2375 if (status != ERROR_CODE_SUCCESS){ 2376 #ifdef ENABLE_LE_CENTRAL 2377 if (hci_is_le_connection_type(addr_type)){ 2378 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2379 } 2380 #endif 2381 // error => outgoing connection failed 2382 if (conn != NULL){ 2383 hci_handle_connection_failed(conn, status); 2384 } 2385 } 2386 } 2387 break; 2388 2389 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2390 if (size < 3) return; 2391 uint16_t num_handles = packet[2]; 2392 if (size != (3u + num_handles * 4u)) return; 2393 uint16_t offset = 3; 2394 for (i=0; i<num_handles;i++){ 2395 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2396 offset += 2u; 2397 uint16_t num_packets = little_endian_read_16(packet, offset); 2398 offset += 2u; 2399 2400 conn = hci_connection_for_handle(handle); 2401 if (!conn){ 2402 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2403 continue; 2404 } 2405 2406 if (conn->num_packets_sent >= num_packets){ 2407 conn->num_packets_sent -= num_packets; 2408 } else { 2409 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2410 conn->num_packets_sent = 0; 2411 } 2412 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2413 2414 #ifdef ENABLE_CLASSIC 2415 // For SCO, we do the can_send_now_check here 2416 hci_notify_if_sco_can_send_now(); 2417 #endif 2418 } 2419 break; 2420 } 2421 2422 #ifdef ENABLE_CLASSIC 2423 case HCI_EVENT_INQUIRY_COMPLETE: 2424 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2425 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2426 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2427 hci_emit_event(event, sizeof(event), 1); 2428 } 2429 break; 2430 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2431 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2432 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2433 } 2434 break; 2435 case HCI_EVENT_CONNECTION_REQUEST: 2436 reverse_bd_addr(&packet[2], addr); 2437 link_type = (hci_link_type_t) packet[11]; 2438 if (hci_stack->gap_classic_accept_callback != NULL){ 2439 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2440 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2441 bd_addr_copy(hci_stack->decline_addr, addr); 2442 break; 2443 } 2444 } 2445 2446 // TODO: eval COD 8-10 2447 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2448 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2449 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2450 if (!conn) { 2451 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2452 } 2453 if (!conn) { 2454 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2455 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2456 bd_addr_copy(hci_stack->decline_addr, addr); 2457 break; 2458 } 2459 conn->role = HCI_ROLE_SLAVE; 2460 conn->state = RECEIVED_CONNECTION_REQUEST; 2461 // store info about eSCO 2462 if (link_type == HCI_LINK_TYPE_ESCO){ 2463 conn->remote_supported_features[0] |= 1; 2464 } 2465 hci_run(); 2466 break; 2467 2468 case HCI_EVENT_CONNECTION_COMPLETE: 2469 // Connection management 2470 reverse_bd_addr(&packet[5], addr); 2471 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2472 addr_type = BD_ADDR_TYPE_ACL; 2473 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2474 if (conn) { 2475 if (!packet[2]){ 2476 conn->state = OPEN; 2477 conn->con_handle = little_endian_read_16(packet, 3); 2478 2479 // queue get remote feature 2480 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2481 2482 // queue set supervision timeout if we're master 2483 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2484 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2485 } 2486 2487 // restart timer 2488 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2489 btstack_run_loop_add_timer(&conn->timeout); 2490 2491 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2492 2493 hci_emit_nr_connections_changed(); 2494 } else { 2495 // connection failed 2496 hci_handle_connection_failed(conn, packet[2]); 2497 } 2498 } 2499 break; 2500 2501 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2502 reverse_bd_addr(&packet[5], addr); 2503 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2504 if (packet[2]){ 2505 // connection failed 2506 break; 2507 } 2508 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2509 if (!conn) { 2510 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2511 } 2512 if (!conn) { 2513 break; 2514 } 2515 conn->state = OPEN; 2516 conn->con_handle = little_endian_read_16(packet, 3); 2517 2518 #ifdef ENABLE_SCO_OVER_HCI 2519 // update SCO 2520 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2521 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2522 } 2523 // trigger can send now 2524 if (hci_have_usb_transport()){ 2525 hci_stack->sco_can_send_now = 1; 2526 } 2527 #endif 2528 #ifdef HAVE_SCO_TRANSPORT 2529 // configure sco transport 2530 if (hci_stack->sco_transport != NULL){ 2531 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2532 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2533 } 2534 #endif 2535 break; 2536 2537 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2538 handle = little_endian_read_16(packet, 3); 2539 conn = hci_connection_for_handle(handle); 2540 if (!conn) break; 2541 if (!packet[2]){ 2542 const uint8_t * features = &packet[5]; 2543 hci_handle_remote_features_page_0(conn, features); 2544 2545 // read extended features if possible 2546 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2547 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2548 break; 2549 } 2550 } 2551 hci_handle_remote_features_received(conn); 2552 break; 2553 2554 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2555 handle = little_endian_read_16(packet, 3); 2556 conn = hci_connection_for_handle(handle); 2557 if (!conn) break; 2558 // status = ok, page = 1 2559 if (!packet[2]) { 2560 uint8_t page_number = packet[5]; 2561 uint8_t maximum_page_number = packet[6]; 2562 const uint8_t * features = &packet[7]; 2563 bool done = false; 2564 switch (page_number){ 2565 case 1: 2566 hci_handle_remote_features_page_1(conn, features); 2567 if (maximum_page_number >= 2){ 2568 // get Secure Connections (Controller) from Page 2 if available 2569 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2570 } else { 2571 // otherwise, assume SC (Controller) == SC (Host) 2572 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2573 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2574 } 2575 done = true; 2576 } 2577 break; 2578 case 2: 2579 hci_handle_remote_features_page_2(conn, features); 2580 done = true; 2581 break; 2582 default: 2583 break; 2584 } 2585 if (!done) break; 2586 } 2587 hci_handle_remote_features_received(conn); 2588 break; 2589 2590 case HCI_EVENT_LINK_KEY_REQUEST: 2591 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2592 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2593 // request handled by hci_run() 2594 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2595 break; 2596 2597 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2598 reverse_bd_addr(&packet[2], addr); 2599 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2600 if (!conn) break; 2601 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2602 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2603 // Change Connection Encryption keeps link key type 2604 if (link_key_type != CHANGED_COMBINATION_KEY){ 2605 conn->link_key_type = link_key_type; 2606 } 2607 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2608 // still forward event to allow dismiss of pairing dialog 2609 break; 2610 } 2611 2612 case HCI_EVENT_PIN_CODE_REQUEST: 2613 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2614 // non-bondable mode: pin code negative reply will be sent 2615 if (!hci_stack->bondable){ 2616 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2617 hci_run(); 2618 return; 2619 } 2620 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2621 if (!hci_stack->link_key_db) break; 2622 hci_event_pin_code_request_get_bd_addr(packet, addr); 2623 hci_stack->link_key_db->delete_link_key(addr); 2624 break; 2625 2626 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2627 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2628 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2629 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2630 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2631 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2632 } else { 2633 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2634 } 2635 #endif 2636 break; 2637 2638 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2639 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2640 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2641 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_REMOTE_OOB_DATA_REPLY); 2642 break; 2643 #endif 2644 2645 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2646 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2647 if (!hci_stack->ssp_auto_accept) break; 2648 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2649 break; 2650 2651 case HCI_EVENT_USER_PASSKEY_REQUEST: 2652 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2653 if (!hci_stack->ssp_auto_accept) break; 2654 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2655 break; 2656 2657 case HCI_EVENT_MODE_CHANGE: 2658 handle = hci_event_mode_change_get_handle(packet); 2659 conn = hci_connection_for_handle(handle); 2660 if (!conn) break; 2661 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2662 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2663 break; 2664 #endif 2665 2666 case HCI_EVENT_ENCRYPTION_CHANGE: 2667 handle = hci_event_encryption_change_get_connection_handle(packet); 2668 conn = hci_connection_for_handle(handle); 2669 if (!conn) break; 2670 if (hci_event_encryption_change_get_status(packet) == 0u) { 2671 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2672 if (encryption_enabled){ 2673 if (hci_is_le_connection(conn)){ 2674 // For LE, we accept connection as encrypted 2675 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2676 } 2677 #ifdef ENABLE_CLASSIC 2678 else { 2679 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2680 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2681 bool connected_uses_aes_ccm = encryption_enabled == 2; 2682 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2683 log_info("SC during pairing, but only E0 now -> abort"); 2684 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2685 break; 2686 } 2687 2688 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2689 if (connected_uses_aes_ccm){ 2690 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2691 } 2692 2693 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2694 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2695 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2696 } else { 2697 // if not, pretend everything is perfect 2698 hci_handle_read_encryption_key_size_complete(conn, 16); 2699 } 2700 } 2701 #endif 2702 } else { 2703 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2704 } 2705 } 2706 2707 break; 2708 2709 #ifdef ENABLE_CLASSIC 2710 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2711 handle = hci_event_authentication_complete_get_connection_handle(packet); 2712 conn = hci_connection_for_handle(handle); 2713 if (!conn) break; 2714 2715 // ignore authentication event if we didn't request it 2716 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2717 2718 // dedicated bonding: send result and disconnect 2719 if (conn->bonding_flags & BONDING_DEDICATED){ 2720 conn->bonding_flags &= ~BONDING_DEDICATED; 2721 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2722 conn->bonding_status = packet[2]; 2723 break; 2724 } 2725 2726 // authenticated only if auth status == 0 2727 if (hci_event_authentication_complete_get_status(packet) == 0){ 2728 // authenticated 2729 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2730 2731 // If link key sufficient for requested security and not already encrypted, start encryption 2732 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2733 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2734 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2735 break; 2736 } 2737 } 2738 2739 // emit updated security level 2740 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2741 break; 2742 #endif 2743 2744 // HCI_EVENT_DISCONNECTION_COMPLETE 2745 // has been split, to first notify stack before shutting connection down 2746 // see end of function, too. 2747 case HCI_EVENT_DISCONNECTION_COMPLETE: 2748 if (packet[2]) break; // status != 0 2749 handle = little_endian_read_16(packet, 3); 2750 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2751 if (hci_stack->acl_fragmentation_total_size > 0u) { 2752 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2753 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2754 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2755 hci_stack->acl_fragmentation_total_size = 0; 2756 hci_stack->acl_fragmentation_pos = 0; 2757 if (release_buffer){ 2758 hci_release_packet_buffer(); 2759 } 2760 } 2761 } 2762 2763 conn = hci_connection_for_handle(handle); 2764 if (!conn) break; 2765 // mark connection for shutdown 2766 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2767 2768 // emit dedicatd bonding event 2769 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2770 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2771 } 2772 2773 #ifdef ENABLE_BLE 2774 #ifdef ENABLE_LE_PERIPHERAL 2775 // re-enable advertisements for le connections if active 2776 if (hci_is_le_connection(conn)){ 2777 hci_update_advertisements_enabled_for_current_roles(); 2778 } 2779 #endif 2780 #endif 2781 break; 2782 2783 case HCI_EVENT_HARDWARE_ERROR: 2784 log_error("Hardware Error: 0x%02x", packet[2]); 2785 if (hci_stack->hardware_error_callback){ 2786 (*hci_stack->hardware_error_callback)(packet[2]); 2787 } else { 2788 // if no special requests, just reboot stack 2789 hci_power_control_off(); 2790 hci_power_control_on(); 2791 } 2792 break; 2793 2794 #ifdef ENABLE_CLASSIC 2795 case HCI_EVENT_ROLE_CHANGE: 2796 if (packet[2]) break; // status != 0 2797 reverse_bd_addr(&packet[3], addr); 2798 addr_type = BD_ADDR_TYPE_ACL; 2799 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2800 if (!conn) break; 2801 conn->role = packet[9]; 2802 break; 2803 #endif 2804 2805 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2806 // release packet buffer only for asynchronous transport and if there are not further fragements 2807 if (hci_transport_synchronous()) { 2808 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2809 return; // instead of break: to avoid re-entering hci_run() 2810 } 2811 hci_stack->acl_fragmentation_tx_active = 0; 2812 if (hci_stack->acl_fragmentation_total_size) break; 2813 hci_release_packet_buffer(); 2814 2815 // L2CAP receives this event via the hci_emit_event below 2816 2817 #ifdef ENABLE_CLASSIC 2818 // For SCO, we do the can_send_now_check here 2819 hci_notify_if_sco_can_send_now(); 2820 #endif 2821 break; 2822 2823 #ifdef ENABLE_CLASSIC 2824 case HCI_EVENT_SCO_CAN_SEND_NOW: 2825 // For SCO, we do the can_send_now_check here 2826 hci_stack->sco_can_send_now = 1; 2827 hci_notify_if_sco_can_send_now(); 2828 return; 2829 2830 // explode inquriy results for easier consumption 2831 case HCI_EVENT_INQUIRY_RESULT: 2832 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2833 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2834 gap_inquiry_explode(packet, size); 2835 break; 2836 #endif 2837 2838 #ifdef ENABLE_BLE 2839 case HCI_EVENT_LE_META: 2840 switch (packet[2]){ 2841 #ifdef ENABLE_LE_CENTRAL 2842 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2843 // log_info("advertising report received"); 2844 if (!hci_stack->le_scanning_enabled) break; 2845 le_handle_advertisement_report(packet, size); 2846 break; 2847 #endif 2848 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2849 event_handle_le_connection_complete(packet); 2850 break; 2851 2852 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2853 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2854 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2855 conn = hci_connection_for_handle(handle); 2856 if (!conn) break; 2857 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2858 break; 2859 2860 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2861 // connection 2862 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2863 conn = hci_connection_for_handle(handle); 2864 if (conn) { 2865 // read arguments 2866 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2867 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2868 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2869 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2870 2871 // validate against current connection parameter range 2872 le_connection_parameter_range_t existing_range; 2873 gap_get_connection_parameter_range(&existing_range); 2874 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2875 if (update_parameter){ 2876 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2877 conn->le_conn_interval_min = le_conn_interval_min; 2878 conn->le_conn_interval_max = le_conn_interval_max; 2879 conn->le_conn_latency = le_conn_latency; 2880 conn->le_supervision_timeout = le_supervision_timeout; 2881 } else { 2882 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 2883 } 2884 } 2885 break; 2886 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2887 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2888 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2889 conn = hci_connection_for_handle(handle); 2890 if (conn) { 2891 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2892 } 2893 break; 2894 #endif 2895 default: 2896 break; 2897 } 2898 break; 2899 #endif 2900 case HCI_EVENT_VENDOR_SPECIFIC: 2901 // Vendor specific commands often create vendor specific event instead of num completed packets 2902 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2903 switch (hci_stack->manufacturer){ 2904 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2905 hci_stack->num_cmd_packets = 1; 2906 break; 2907 default: 2908 break; 2909 } 2910 break; 2911 default: 2912 break; 2913 } 2914 2915 handle_event_for_current_stack_state(packet, size); 2916 2917 // notify upper stack 2918 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2919 2920 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2921 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 2922 handle = little_endian_read_16(packet, 3); 2923 hci_connection_t * aConn = hci_connection_for_handle(handle); 2924 // discard connection if app did not trigger a reconnect in the event handler 2925 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2926 hci_shutdown_connection(aConn); 2927 } 2928 } 2929 2930 // execute main loop 2931 hci_run(); 2932 } 2933 2934 #ifdef ENABLE_CLASSIC 2935 2936 #ifdef ENABLE_SCO_OVER_HCI 2937 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2938 static void sco_schedule_tx(hci_connection_t * conn); 2939 2940 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2941 log_debug("SCO TX Timeout"); 2942 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2943 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2944 if (!conn) return; 2945 2946 // trigger send 2947 conn->sco_tx_ready = 1; 2948 // extra packet if CVSD but SCO buffer is too short 2949 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2950 conn->sco_tx_ready++; 2951 } 2952 hci_notify_if_sco_can_send_now(); 2953 } 2954 2955 2956 #define SCO_TX_AFTER_RX_MS (6) 2957 2958 static void sco_schedule_tx(hci_connection_t * conn){ 2959 2960 uint32_t now = btstack_run_loop_get_time_ms(); 2961 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2962 int time_delta_ms = sco_tx_ms - now; 2963 2964 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2965 2966 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2967 btstack_run_loop_set_timer(timer, time_delta_ms); 2968 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2969 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2970 btstack_run_loop_add_timer(timer); 2971 } 2972 #endif 2973 2974 static void sco_handler(uint8_t * packet, uint16_t size){ 2975 // lookup connection struct 2976 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2977 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2978 if (!conn) return; 2979 2980 #ifdef ENABLE_SCO_OVER_HCI 2981 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2982 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2983 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2984 packet[2] = 0x3c; 2985 memmove(&packet[3], &packet[23], 63); 2986 size = 63; 2987 } 2988 } 2989 2990 if (hci_have_usb_transport()){ 2991 // Nothing to do 2992 } else { 2993 // 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); 2994 if (hci_stack->synchronous_flow_control_enabled == 0){ 2995 uint32_t now = btstack_run_loop_get_time_ms(); 2996 2997 if (!conn->sco_rx_valid){ 2998 // ignore first 10 packets 2999 conn->sco_rx_count++; 3000 // log_debug("sco rx count %u", conn->sco_rx_count); 3001 if (conn->sco_rx_count == 10) { 3002 // use first timestamp as is and pretent it just started 3003 conn->sco_rx_ms = now; 3004 conn->sco_rx_valid = 1; 3005 conn->sco_rx_count = 0; 3006 sco_schedule_tx(conn); 3007 } 3008 } else { 3009 // track expected arrival timme 3010 conn->sco_rx_count++; 3011 conn->sco_rx_ms += 7; 3012 int delta = (int32_t) (now - conn->sco_rx_ms); 3013 if (delta > 0){ 3014 conn->sco_rx_ms++; 3015 } 3016 // log_debug("sco rx %u", conn->sco_rx_ms); 3017 sco_schedule_tx(conn); 3018 } 3019 } 3020 } 3021 #endif 3022 3023 // deliver to app 3024 if (hci_stack->sco_packet_handler) { 3025 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3026 } 3027 3028 #ifdef HAVE_SCO_TRANSPORT 3029 // We can send one packet for each received packet 3030 conn->sco_tx_ready++; 3031 hci_notify_if_sco_can_send_now(); 3032 #endif 3033 3034 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3035 conn->num_packets_completed++; 3036 hci_stack->host_completed_packets = 1; 3037 hci_run(); 3038 #endif 3039 } 3040 #endif 3041 3042 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3043 hci_dump_packet(packet_type, 1, packet, size); 3044 switch (packet_type) { 3045 case HCI_EVENT_PACKET: 3046 event_handler(packet, size); 3047 break; 3048 case HCI_ACL_DATA_PACKET: 3049 acl_handler(packet, size); 3050 break; 3051 #ifdef ENABLE_CLASSIC 3052 case HCI_SCO_DATA_PACKET: 3053 sco_handler(packet, size); 3054 break; 3055 #endif 3056 default: 3057 break; 3058 } 3059 } 3060 3061 /** 3062 * @brief Add event packet handler. 3063 */ 3064 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3065 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3066 } 3067 3068 3069 /** Register HCI packet handlers */ 3070 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3071 hci_stack->acl_packet_handler = handler; 3072 } 3073 3074 #ifdef ENABLE_CLASSIC 3075 /** 3076 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3077 */ 3078 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3079 hci_stack->sco_packet_handler = handler; 3080 } 3081 #endif 3082 3083 static void hci_state_reset(void){ 3084 // no connections yet 3085 hci_stack->connections = NULL; 3086 3087 // keep discoverable/connectable as this has been requested by the client(s) 3088 // hci_stack->discoverable = 0; 3089 // hci_stack->connectable = 0; 3090 // hci_stack->bondable = 1; 3091 // hci_stack->own_addr_type = 0; 3092 3093 // buffer is free 3094 hci_stack->hci_packet_buffer_reserved = 0; 3095 3096 // no pending cmds 3097 hci_stack->decline_reason = 0; 3098 hci_stack->new_scan_enable_value = 0xff; 3099 3100 hci_stack->secure_connections_active = false; 3101 3102 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3103 hci_stack->classic_read_local_oob_data = true; 3104 #endif 3105 3106 // LE 3107 #ifdef ENABLE_BLE 3108 memset(hci_stack->le_random_address, 0, 6); 3109 hci_stack->le_random_address_set = 0; 3110 #endif 3111 #ifdef ENABLE_LE_CENTRAL 3112 hci_stack->le_scanning_active = 0; 3113 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3114 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3115 hci_stack->le_whitelist_capacity = 0; 3116 #endif 3117 } 3118 3119 #ifdef ENABLE_CLASSIC 3120 /** 3121 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3122 */ 3123 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3124 // store and open remote device db 3125 hci_stack->link_key_db = link_key_db; 3126 if (hci_stack->link_key_db) { 3127 hci_stack->link_key_db->open(); 3128 } 3129 } 3130 #endif 3131 3132 void hci_init(const hci_transport_t *transport, const void *config){ 3133 3134 #ifdef HAVE_MALLOC 3135 if (!hci_stack) { 3136 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3137 } 3138 #else 3139 hci_stack = &hci_stack_static; 3140 #endif 3141 memset(hci_stack, 0, sizeof(hci_stack_t)); 3142 3143 // reference to use transport layer implementation 3144 hci_stack->hci_transport = transport; 3145 3146 // reference to used config 3147 hci_stack->config = config; 3148 3149 // setup pointer for outgoing packet buffer 3150 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3151 3152 // max acl payload size defined in config.h 3153 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3154 3155 // register packet handlers with transport 3156 transport->register_packet_handler(&packet_handler); 3157 3158 hci_stack->state = HCI_STATE_OFF; 3159 3160 // class of device 3161 hci_stack->class_of_device = 0x007a020c; // Smartphone 3162 3163 // bondable by default 3164 hci_stack->bondable = 1; 3165 3166 #ifdef ENABLE_CLASSIC 3167 // classic name 3168 hci_stack->local_name = default_classic_name; 3169 3170 // Master slave policy 3171 hci_stack->master_slave_policy = 1; 3172 3173 // Allow Role Switch 3174 hci_stack->allow_role_switch = 1; 3175 3176 // Default / minimum security level = 2 3177 hci_stack->gap_security_level = LEVEL_2; 3178 3179 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3180 hci_stack->gap_required_encyrption_key_size = 7; 3181 #endif 3182 3183 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3184 hci_stack->ssp_enable = 1; 3185 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3186 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3187 hci_stack->ssp_auto_accept = 1; 3188 3189 // Secure Connections: enable (requires support from Controller) 3190 hci_stack->secure_connections_enable = true; 3191 3192 // voice setting - signed 16 bit pcm data with CVSD over the air 3193 hci_stack->sco_voice_setting = 0x60; 3194 3195 #ifdef ENABLE_LE_CENTRAL 3196 // connection parameter to use for outgoing connections 3197 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3198 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3199 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3200 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3201 hci_stack->le_connection_latency = 4; // 4 3202 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3203 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3204 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3205 3206 // default LE Scanning 3207 hci_stack->le_scan_type = 0x1; // active 3208 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3209 hci_stack->le_scan_window = 0x30; // 30 ms 3210 #endif 3211 3212 #ifdef ENABLE_LE_PERIPHERAL 3213 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3214 #endif 3215 3216 // connection parameter range used to answer connection parameter update requests in l2cap 3217 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3218 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3219 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3220 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3221 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3222 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3223 3224 hci_state_reset(); 3225 } 3226 3227 void hci_deinit(void){ 3228 #ifdef HAVE_MALLOC 3229 if (hci_stack) { 3230 free(hci_stack); 3231 } 3232 #endif 3233 hci_stack = NULL; 3234 3235 #ifdef ENABLE_CLASSIC 3236 disable_l2cap_timeouts = 0; 3237 #endif 3238 } 3239 3240 /** 3241 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3242 */ 3243 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3244 hci_stack->chipset = chipset_driver; 3245 3246 // reset chipset driver - init is also called on power_up 3247 if (hci_stack->chipset && hci_stack->chipset->init){ 3248 hci_stack->chipset->init(hci_stack->config); 3249 } 3250 } 3251 3252 /** 3253 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3254 */ 3255 void hci_set_control(const btstack_control_t *hardware_control){ 3256 // references to used control implementation 3257 hci_stack->control = hardware_control; 3258 // init with transport config 3259 hardware_control->init(hci_stack->config); 3260 } 3261 3262 void hci_close(void){ 3263 // close remote device db 3264 if (hci_stack->link_key_db) { 3265 hci_stack->link_key_db->close(); 3266 } 3267 3268 btstack_linked_list_iterator_t lit; 3269 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3270 while (btstack_linked_list_iterator_has_next(&lit)){ 3271 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3272 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3273 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3274 hci_shutdown_connection(connection); 3275 } 3276 3277 hci_power_control(HCI_POWER_OFF); 3278 3279 #ifdef HAVE_MALLOC 3280 free(hci_stack); 3281 #endif 3282 hci_stack = NULL; 3283 } 3284 3285 #ifdef HAVE_SCO_TRANSPORT 3286 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3287 hci_stack->sco_transport = sco_transport; 3288 sco_transport->register_packet_handler(&packet_handler); 3289 } 3290 #endif 3291 3292 #ifdef ENABLE_CLASSIC 3293 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3294 // validate ranage and set 3295 if (encryption_key_size < 7) return; 3296 if (encryption_key_size > 16) return; 3297 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3298 } 3299 3300 void gap_set_security_level(gap_security_level_t security_level){ 3301 hci_stack->gap_security_level = security_level; 3302 } 3303 3304 gap_security_level_t gap_get_security_level(void){ 3305 return hci_stack->gap_security_level; 3306 } 3307 #endif 3308 3309 #ifdef ENABLE_CLASSIC 3310 void gap_set_class_of_device(uint32_t class_of_device){ 3311 hci_stack->class_of_device = class_of_device; 3312 } 3313 3314 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3315 hci_stack->default_link_policy_settings = default_link_policy_settings; 3316 } 3317 3318 void gap_set_allow_role_switch(bool allow_role_switch){ 3319 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3320 } 3321 3322 uint8_t hci_get_allow_role_switch(void){ 3323 return hci_stack->allow_role_switch; 3324 } 3325 3326 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3327 hci_stack->link_supervision_timeout = link_supervision_timeout; 3328 } 3329 3330 void hci_disable_l2cap_timeout_check(void){ 3331 disable_l2cap_timeouts = 1; 3332 } 3333 #endif 3334 3335 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3336 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3337 void hci_set_bd_addr(bd_addr_t addr){ 3338 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3339 hci_stack->custom_bd_addr_set = 1; 3340 } 3341 #endif 3342 3343 // State-Module-Driver overview 3344 // state module low-level 3345 // HCI_STATE_OFF off close 3346 // HCI_STATE_INITIALIZING, on open 3347 // HCI_STATE_WORKING, on open 3348 // HCI_STATE_HALTING, on open 3349 // HCI_STATE_SLEEPING, off/sleep close 3350 // HCI_STATE_FALLING_ASLEEP on open 3351 3352 static int hci_power_control_on(void){ 3353 3354 // power on 3355 int err = 0; 3356 if (hci_stack->control && hci_stack->control->on){ 3357 err = (*hci_stack->control->on)(); 3358 } 3359 if (err){ 3360 log_error( "POWER_ON failed"); 3361 hci_emit_hci_open_failed(); 3362 return err; 3363 } 3364 3365 // int chipset driver 3366 if (hci_stack->chipset && hci_stack->chipset->init){ 3367 hci_stack->chipset->init(hci_stack->config); 3368 } 3369 3370 // init transport 3371 if (hci_stack->hci_transport->init){ 3372 hci_stack->hci_transport->init(hci_stack->config); 3373 } 3374 3375 // open transport 3376 err = hci_stack->hci_transport->open(); 3377 if (err){ 3378 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3379 if (hci_stack->control && hci_stack->control->off){ 3380 (*hci_stack->control->off)(); 3381 } 3382 hci_emit_hci_open_failed(); 3383 return err; 3384 } 3385 return 0; 3386 } 3387 3388 static void hci_power_control_off(void){ 3389 3390 log_info("hci_power_control_off"); 3391 3392 // close low-level device 3393 hci_stack->hci_transport->close(); 3394 3395 log_info("hci_power_control_off - hci_transport closed"); 3396 3397 // power off 3398 if (hci_stack->control && hci_stack->control->off){ 3399 (*hci_stack->control->off)(); 3400 } 3401 3402 log_info("hci_power_control_off - control closed"); 3403 3404 hci_stack->state = HCI_STATE_OFF; 3405 } 3406 3407 static void hci_power_control_sleep(void){ 3408 3409 log_info("hci_power_control_sleep"); 3410 3411 #if 0 3412 // don't close serial port during sleep 3413 3414 // close low-level device 3415 hci_stack->hci_transport->close(hci_stack->config); 3416 #endif 3417 3418 // sleep mode 3419 if (hci_stack->control && hci_stack->control->sleep){ 3420 (*hci_stack->control->sleep)(); 3421 } 3422 3423 hci_stack->state = HCI_STATE_SLEEPING; 3424 } 3425 3426 static int hci_power_control_wake(void){ 3427 3428 log_info("hci_power_control_wake"); 3429 3430 // wake on 3431 if (hci_stack->control && hci_stack->control->wake){ 3432 (*hci_stack->control->wake)(); 3433 } 3434 3435 #if 0 3436 // open low-level device 3437 int err = hci_stack->hci_transport->open(hci_stack->config); 3438 if (err){ 3439 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3440 if (hci_stack->control && hci_stack->control->off){ 3441 (*hci_stack->control->off)(); 3442 } 3443 hci_emit_hci_open_failed(); 3444 return err; 3445 } 3446 #endif 3447 3448 return 0; 3449 } 3450 3451 static void hci_power_transition_to_initializing(void){ 3452 // set up state machine 3453 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3454 hci_stack->hci_packet_buffer_reserved = 0; 3455 hci_stack->state = HCI_STATE_INITIALIZING; 3456 hci_stack->substate = HCI_INIT_SEND_RESET; 3457 } 3458 3459 // returns error 3460 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3461 int err; 3462 switch (power_mode){ 3463 case HCI_POWER_ON: 3464 err = hci_power_control_on(); 3465 if (err != 0) { 3466 log_error("hci_power_control_on() error %d", err); 3467 return err; 3468 } 3469 hci_power_transition_to_initializing(); 3470 break; 3471 case HCI_POWER_OFF: 3472 // do nothing 3473 break; 3474 case HCI_POWER_SLEEP: 3475 // do nothing (with SLEEP == OFF) 3476 break; 3477 default: 3478 btstack_assert(false); 3479 break; 3480 } 3481 return ERROR_CODE_SUCCESS; 3482 } 3483 3484 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3485 switch (power_mode){ 3486 case HCI_POWER_ON: 3487 // do nothing 3488 break; 3489 case HCI_POWER_OFF: 3490 // no connections yet, just turn it off 3491 hci_power_control_off(); 3492 break; 3493 case HCI_POWER_SLEEP: 3494 // no connections yet, just turn it off 3495 hci_power_control_sleep(); 3496 break; 3497 default: 3498 btstack_assert(false); 3499 break; 3500 } 3501 return ERROR_CODE_SUCCESS; 3502 } 3503 3504 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3505 switch (power_mode){ 3506 case HCI_POWER_ON: 3507 // do nothing 3508 break; 3509 case HCI_POWER_OFF: 3510 // see hci_run 3511 hci_stack->state = HCI_STATE_HALTING; 3512 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3513 break; 3514 case HCI_POWER_SLEEP: 3515 // see hci_run 3516 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3517 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 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_halting(HCI_POWER_MODE power_mode) { 3527 switch (power_mode){ 3528 case HCI_POWER_ON: 3529 hci_power_transition_to_initializing(); 3530 break; 3531 case HCI_POWER_OFF: 3532 // do nothing 3533 break; 3534 case HCI_POWER_SLEEP: 3535 // see hci_run 3536 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3537 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 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_falling_asleep(HCI_POWER_MODE power_mode) { 3547 switch (power_mode){ 3548 case HCI_POWER_ON: 3549 3550 #ifdef HAVE_PLATFORM_IPHONE_OS 3551 // nothing to do, if H4 supports power management 3552 if (btstack_control_iphone_power_management_enabled()){ 3553 hci_stack->state = HCI_STATE_INITIALIZING; 3554 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3555 break; 3556 } 3557 #endif 3558 hci_power_transition_to_initializing(); 3559 break; 3560 case HCI_POWER_OFF: 3561 // see hci_run 3562 hci_stack->state = HCI_STATE_HALTING; 3563 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3564 break; 3565 case HCI_POWER_SLEEP: 3566 // do nothing 3567 break; 3568 default: 3569 btstack_assert(false); 3570 break; 3571 } 3572 return ERROR_CODE_SUCCESS; 3573 } 3574 3575 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3576 int err; 3577 switch (power_mode){ 3578 case HCI_POWER_ON: 3579 #ifdef HAVE_PLATFORM_IPHONE_OS 3580 // nothing to do, if H4 supports power management 3581 if (btstack_control_iphone_power_management_enabled()){ 3582 hci_stack->state = HCI_STATE_INITIALIZING; 3583 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3584 hci_update_scan_enable(); 3585 break; 3586 } 3587 #endif 3588 err = hci_power_control_wake(); 3589 if (err) return err; 3590 hci_power_transition_to_initializing(); 3591 break; 3592 case HCI_POWER_OFF: 3593 hci_stack->state = HCI_STATE_HALTING; 3594 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3595 break; 3596 case HCI_POWER_SLEEP: 3597 // do nothing 3598 break; 3599 default: 3600 btstack_assert(false); 3601 break; 3602 } 3603 return ERROR_CODE_SUCCESS; 3604 } 3605 3606 int hci_power_control(HCI_POWER_MODE power_mode){ 3607 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3608 int err = 0; 3609 switch (hci_stack->state){ 3610 case HCI_STATE_OFF: 3611 err = hci_power_control_state_off(power_mode); 3612 break; 3613 case HCI_STATE_INITIALIZING: 3614 err = hci_power_control_state_initializing(power_mode); 3615 break; 3616 case HCI_STATE_WORKING: 3617 err = hci_power_control_state_working(power_mode); 3618 break; 3619 case HCI_STATE_HALTING: 3620 err = hci_power_control_state_halting(power_mode); 3621 break; 3622 case HCI_STATE_FALLING_ASLEEP: 3623 err = hci_power_control_state_falling_asleep(power_mode); 3624 break; 3625 case HCI_STATE_SLEEPING: 3626 err = hci_power_control_state_sleeping(power_mode); 3627 break; 3628 default: 3629 btstack_assert(false); 3630 break; 3631 } 3632 if (err != 0){ 3633 return err; 3634 } 3635 3636 // create internal event 3637 hci_emit_state(); 3638 3639 // trigger next/first action 3640 hci_run(); 3641 3642 return 0; 3643 } 3644 3645 3646 #ifdef ENABLE_CLASSIC 3647 3648 static void hci_update_scan_enable(void){ 3649 // 2 = page scan, 1 = inq scan 3650 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3651 hci_run(); 3652 } 3653 3654 void gap_discoverable_control(uint8_t enable){ 3655 if (enable) enable = 1; // normalize argument 3656 3657 if (hci_stack->discoverable == enable){ 3658 hci_emit_discoverable_enabled(hci_stack->discoverable); 3659 return; 3660 } 3661 3662 hci_stack->discoverable = enable; 3663 hci_update_scan_enable(); 3664 } 3665 3666 void gap_connectable_control(uint8_t enable){ 3667 if (enable) enable = 1; // normalize argument 3668 3669 // don't emit event 3670 if (hci_stack->connectable == enable) return; 3671 3672 hci_stack->connectable = enable; 3673 hci_update_scan_enable(); 3674 } 3675 #endif 3676 3677 void gap_local_bd_addr(bd_addr_t address_buffer){ 3678 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3679 } 3680 3681 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3682 static void hci_host_num_completed_packets(void){ 3683 3684 // create packet manually as arrays are not supported and num_commands should not get reduced 3685 hci_reserve_packet_buffer(); 3686 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3687 3688 uint16_t size = 0; 3689 uint16_t num_handles = 0; 3690 packet[size++] = 0x35; 3691 packet[size++] = 0x0c; 3692 size++; // skip param len 3693 size++; // skip num handles 3694 3695 // add { handle, packets } entries 3696 btstack_linked_item_t * it; 3697 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3698 hci_connection_t * connection = (hci_connection_t *) it; 3699 if (connection->num_packets_completed){ 3700 little_endian_store_16(packet, size, connection->con_handle); 3701 size += 2; 3702 little_endian_store_16(packet, size, connection->num_packets_completed); 3703 size += 2; 3704 // 3705 num_handles++; 3706 connection->num_packets_completed = 0; 3707 } 3708 } 3709 3710 packet[2] = size - 3; 3711 packet[3] = num_handles; 3712 3713 hci_stack->host_completed_packets = 0; 3714 3715 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3716 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3717 3718 // release packet buffer for synchronous transport implementations 3719 if (hci_transport_synchronous()){ 3720 hci_release_packet_buffer(); 3721 hci_emit_transport_packet_sent(); 3722 } 3723 } 3724 #endif 3725 3726 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3727 UNUSED(ds); 3728 hci_stack->substate = HCI_HALTING_CLOSE; 3729 // allow packet handlers to defer final shutdown 3730 hci_emit_state(); 3731 hci_run(); 3732 } 3733 3734 static bool hci_run_acl_fragments(void){ 3735 if (hci_stack->acl_fragmentation_total_size > 0u) { 3736 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3737 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3738 if (connection) { 3739 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3740 hci_send_acl_packet_fragments(connection); 3741 return true; 3742 } 3743 } else { 3744 // connection gone -> discard further fragments 3745 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3746 hci_stack->acl_fragmentation_total_size = 0; 3747 hci_stack->acl_fragmentation_pos = 0; 3748 } 3749 } 3750 return false; 3751 } 3752 3753 #ifdef ENABLE_CLASSIC 3754 static bool hci_run_general_gap_classic(void){ 3755 3756 // decline incoming connections 3757 if (hci_stack->decline_reason){ 3758 uint8_t reason = hci_stack->decline_reason; 3759 hci_stack->decline_reason = 0; 3760 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3761 return true; 3762 } 3763 // send scan enable 3764 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3765 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3766 hci_stack->new_scan_enable_value = 0xff; 3767 return true; 3768 } 3769 // start/stop inquiry 3770 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3771 uint8_t duration = hci_stack->inquiry_state; 3772 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3773 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3774 return true; 3775 } 3776 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3777 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3778 hci_send_cmd(&hci_inquiry_cancel); 3779 return true; 3780 } 3781 // remote name request 3782 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3783 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3784 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3785 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3786 return true; 3787 } 3788 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3789 // Local OOB data 3790 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 3791 hci_stack->classic_read_local_oob_data = false; 3792 if (hci_stack->local_supported_commands[1] & 0x10u){ 3793 hci_send_cmd(&hci_read_local_extended_oob_data); 3794 } else { 3795 hci_send_cmd(&hci_read_local_oob_data); 3796 } 3797 } 3798 #endif 3799 // pairing 3800 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3801 uint8_t state = hci_stack->gap_pairing_state; 3802 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3803 switch (state){ 3804 case GAP_PAIRING_STATE_SEND_PIN: 3805 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, hci_stack->gap_pairing_input.gap_pairing_pin); 3806 break; 3807 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3808 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3809 break; 3810 case GAP_PAIRING_STATE_SEND_PASSKEY: 3811 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3812 break; 3813 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3814 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3815 break; 3816 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3817 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3818 break; 3819 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3820 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3821 break; 3822 default: 3823 break; 3824 } 3825 return true; 3826 } 3827 return false; 3828 } 3829 #endif 3830 3831 #ifdef ENABLE_BLE 3832 static bool hci_run_general_gap_le(void){ 3833 3834 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3835 3836 if (hci_stack->state != HCI_STATE_WORKING) return false; 3837 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3838 3839 3840 // Phase 1: collect what to stop 3841 3842 bool scanning_stop = false; 3843 bool connecting_stop = false; 3844 bool advertising_stop = false; 3845 3846 #ifndef ENABLE_LE_CENTRAL 3847 UNUSED(scanning_stop); 3848 UNUSED(connecting_stop); 3849 #endif 3850 #ifndef ENABLE_LE_PERIPHERAL 3851 UNUSED(advertising_stop); 3852 #endif 3853 3854 // check if whitelist needs modification 3855 bool whitelist_modification_pending = false; 3856 btstack_linked_list_iterator_t lit; 3857 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3858 while (btstack_linked_list_iterator_has_next(&lit)){ 3859 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3860 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3861 whitelist_modification_pending = true; 3862 break; 3863 } 3864 } 3865 // check if resolving list needs modification 3866 bool resolving_list_modification_pending = false; 3867 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3868 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 3869 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 3870 resolving_list_modification_pending = true; 3871 } 3872 #endif 3873 3874 #ifdef ENABLE_LE_CENTRAL 3875 // scanning control 3876 if (hci_stack->le_scanning_active) { 3877 // stop if: 3878 // - parameter change required 3879 // - it's disabled 3880 // - whitelist change required but used for scanning 3881 // - resolving list modified 3882 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 3883 if ((hci_stack->le_scanning_param_update) || 3884 !hci_stack->le_scanning_enabled || 3885 scanning_uses_whitelist || 3886 resolving_list_modification_pending){ 3887 3888 scanning_stop = true; 3889 } 3890 } 3891 #endif 3892 3893 #ifdef ENABLE_LE_CENTRAL 3894 // connecting control 3895 bool connecting_with_whitelist; 3896 switch (hci_stack->le_connecting_state){ 3897 case LE_CONNECTING_DIRECT: 3898 case LE_CONNECTING_WHITELIST: 3899 // stop connecting if: 3900 // - connecting uses white and whitelist modification pending 3901 // - if it got disabled 3902 // - resolving list modified 3903 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 3904 if ((connecting_with_whitelist && whitelist_modification_pending) || 3905 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 3906 resolving_list_modification_pending) { 3907 3908 connecting_stop = true; 3909 } 3910 break; 3911 default: 3912 break; 3913 } 3914 #endif 3915 3916 #ifdef ENABLE_LE_PERIPHERAL 3917 // le advertisement control 3918 if (hci_stack->le_advertisements_active){ 3919 // stop if: 3920 // - parameter change required 3921 // - it's disabled 3922 // - whitelist change required but used for advertisement filter policy 3923 // - resolving list modified 3924 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy > 0; 3925 if ((hci_stack->le_advertisements_todo != 0) || 3926 !hci_stack->le_advertisements_enabled_for_current_roles || 3927 (advertising_uses_whitelist & whitelist_modification_pending) || 3928 resolving_list_modification_pending) { 3929 3930 advertising_stop = true; 3931 } 3932 } 3933 #endif 3934 3935 3936 // Phase 2: stop everything that should be off during modifications 3937 3938 #ifdef ENABLE_LE_CENTRAL 3939 if (scanning_stop){ 3940 hci_stack->le_scanning_active = false; 3941 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3942 return true; 3943 } 3944 #endif 3945 3946 #ifdef ENABLE_LE_CENTRAL 3947 if (connecting_stop){ 3948 hci_send_cmd(&hci_le_create_connection_cancel); 3949 return true; 3950 } 3951 #endif 3952 3953 #ifdef ENABLE_LE_PERIPHERAL 3954 if (advertising_stop){ 3955 hci_stack->le_advertisements_active = false; 3956 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3957 return true; 3958 } 3959 #endif 3960 3961 // Phase 3: modify 3962 3963 #ifdef ENABLE_LE_CENTRAL 3964 if (hci_stack->le_scanning_param_update){ 3965 hci_stack->le_scanning_param_update = false; 3966 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 3967 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 3968 return true; 3969 } 3970 #endif 3971 3972 #ifdef ENABLE_LE_PERIPHERAL 3973 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3974 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3975 hci_send_cmd(&hci_le_set_advertising_parameters, 3976 hci_stack->le_advertisements_interval_min, 3977 hci_stack->le_advertisements_interval_max, 3978 hci_stack->le_advertisements_type, 3979 hci_stack->le_own_addr_type, 3980 hci_stack->le_advertisements_direct_address_type, 3981 hci_stack->le_advertisements_direct_address, 3982 hci_stack->le_advertisements_channel_map, 3983 hci_stack->le_advertisements_filter_policy); 3984 return true; 3985 } 3986 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3987 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3988 uint8_t adv_data_clean[31]; 3989 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3990 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3991 hci_stack->le_advertisements_data_len); 3992 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3993 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3994 return true; 3995 } 3996 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3997 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3998 uint8_t scan_data_clean[31]; 3999 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4000 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4001 hci_stack->le_scan_response_data_len); 4002 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4003 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4004 return true; 4005 } 4006 #endif 4007 4008 4009 #ifdef ENABLE_LE_CENTRAL 4010 // if connect with whitelist was active and is not cancelled yet, wait until next time 4011 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4012 #endif 4013 4014 // LE Whitelist Management 4015 if (whitelist_modification_pending){ 4016 // add/remove entries 4017 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4018 while (btstack_linked_list_iterator_has_next(&lit)){ 4019 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4020 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4021 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4022 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4023 return true; 4024 } 4025 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4026 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4027 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4028 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4029 return true; 4030 } 4031 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4032 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4033 btstack_memory_whitelist_entry_free(entry); 4034 } 4035 } 4036 } 4037 4038 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4039 // LE Resolving List Management 4040 if (resolving_list_supported) { 4041 uint16_t i; 4042 switch (hci_stack->le_resolving_list_state) { 4043 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4044 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4045 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4046 return true; 4047 case LE_RESOLVING_LIST_READ_SIZE: 4048 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4049 hci_send_cmd(&hci_le_read_resolving_list_size); 4050 return true; 4051 case LE_RESOLVING_LIST_SEND_CLEAR: 4052 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4053 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4054 sizeof(hci_stack->le_resolving_list_add_entries)); 4055 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4056 sizeof(hci_stack->le_resolving_list_remove_entries)); 4057 hci_send_cmd(&hci_le_clear_resolving_list); 4058 return true; 4059 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4060 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4061 uint8_t offset = i >> 3; 4062 uint8_t mask = 1 << (i & 7); 4063 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4064 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4065 bd_addr_t peer_identity_addreses; 4066 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4067 sm_key_t peer_irk; 4068 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4069 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4070 4071 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4072 // trigger whitelist entry 'update' (work around for controller bug) 4073 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4074 while (btstack_linked_list_iterator_has_next(&lit)) { 4075 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4076 if (entry->address_type != peer_identity_addr_type) continue; 4077 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4078 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4079 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4080 } 4081 #endif 4082 4083 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4084 peer_identity_addreses); 4085 return true; 4086 } 4087 4088 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4089 4090 /* fall through */ 4091 4092 case LE_RESOLVING_LIST_ADD_ENTRIES: 4093 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4094 uint8_t offset = i >> 3; 4095 uint8_t mask = 1 << (i & 7); 4096 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4097 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4098 bd_addr_t peer_identity_addreses; 4099 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4100 sm_key_t peer_irk; 4101 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4102 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4103 const uint8_t *local_irk = gap_get_persistent_irk(); 4104 // command uses format specifier 'P' that stores 16-byte value without flip 4105 uint8_t local_irk_flipped[16]; 4106 uint8_t peer_irk_flipped[16]; 4107 reverse_128(local_irk, local_irk_flipped); 4108 reverse_128(peer_irk, peer_irk_flipped); 4109 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4110 peer_irk_flipped, local_irk_flipped); 4111 return true; 4112 } 4113 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4114 break; 4115 4116 default: 4117 break; 4118 } 4119 } 4120 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4121 #endif 4122 4123 // Phase 4: restore state 4124 4125 #ifdef ENABLE_LE_CENTRAL 4126 // re-start scanning 4127 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4128 hci_stack->le_scanning_active = true; 4129 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4130 return true; 4131 } 4132 #endif 4133 4134 #ifdef ENABLE_LE_CENTRAL 4135 // re-start connecting 4136 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4137 bd_addr_t null_addr; 4138 memset(null_addr, 0, 6); 4139 hci_send_cmd(&hci_le_create_connection, 4140 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4141 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4142 1, // use whitelist 4143 0, // peer address type 4144 null_addr, // peer bd addr 4145 hci_stack->le_own_addr_type, // our addr type: 4146 hci_stack->le_connection_interval_min, // conn interval min 4147 hci_stack->le_connection_interval_max, // conn interval max 4148 hci_stack->le_connection_latency, // conn latency 4149 hci_stack->le_supervision_timeout, // conn latency 4150 hci_stack->le_minimum_ce_length, // min ce length 4151 hci_stack->le_maximum_ce_length // max ce length 4152 ); 4153 return true; 4154 } 4155 #endif 4156 4157 #ifdef ENABLE_LE_PERIPHERAL 4158 // re-start advertising 4159 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4160 // check if advertisements should be enabled given 4161 hci_stack->le_advertisements_active = true; 4162 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4163 return true; 4164 } 4165 #endif 4166 4167 return false; 4168 } 4169 #endif 4170 4171 static bool hci_run_general_pending_commands(void){ 4172 btstack_linked_item_t * it; 4173 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4174 hci_connection_t * connection = (hci_connection_t *) it; 4175 4176 switch(connection->state){ 4177 case SEND_CREATE_CONNECTION: 4178 switch(connection->address_type){ 4179 #ifdef ENABLE_CLASSIC 4180 case BD_ADDR_TYPE_ACL: 4181 log_info("sending hci_create_connection"); 4182 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4183 break; 4184 #endif 4185 default: 4186 #ifdef ENABLE_BLE 4187 #ifdef ENABLE_LE_CENTRAL 4188 log_info("sending hci_le_create_connection"); 4189 hci_send_cmd(&hci_le_create_connection, 4190 hci_stack->le_connection_scan_interval, // conn scan interval 4191 hci_stack->le_connection_scan_window, // conn scan windows 4192 0, // don't use whitelist 4193 connection->address_type, // peer address type 4194 connection->address, // peer bd addr 4195 hci_stack->le_own_addr_type, // our addr type: 4196 hci_stack->le_connection_interval_min, // conn interval min 4197 hci_stack->le_connection_interval_max, // conn interval max 4198 hci_stack->le_connection_latency, // conn latency 4199 hci_stack->le_supervision_timeout, // conn latency 4200 hci_stack->le_minimum_ce_length, // min ce length 4201 hci_stack->le_maximum_ce_length // max ce length 4202 ); 4203 connection->state = SENT_CREATE_CONNECTION; 4204 #endif 4205 #endif 4206 break; 4207 } 4208 return true; 4209 4210 #ifdef ENABLE_CLASSIC 4211 case RECEIVED_CONNECTION_REQUEST: 4212 connection->role = HCI_ROLE_SLAVE; 4213 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4214 log_info("sending hci_accept_connection_request"); 4215 connection->state = ACCEPTED_CONNECTION_REQUEST; 4216 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4217 } 4218 return true; 4219 #endif 4220 4221 #ifdef ENABLE_BLE 4222 #ifdef ENABLE_LE_CENTRAL 4223 case SEND_CANCEL_CONNECTION: 4224 connection->state = SENT_CANCEL_CONNECTION; 4225 hci_send_cmd(&hci_le_create_connection_cancel); 4226 return true; 4227 #endif 4228 #endif 4229 case SEND_DISCONNECT: 4230 connection->state = SENT_DISCONNECT; 4231 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4232 return true; 4233 4234 default: 4235 break; 4236 } 4237 4238 // no further commands if connection is about to get shut down 4239 if (connection->state == SENT_DISCONNECT) continue; 4240 4241 if (connection->authentication_flags & READ_RSSI){ 4242 connectionClearAuthenticationFlags(connection, READ_RSSI); 4243 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4244 return true; 4245 } 4246 4247 #ifdef ENABLE_CLASSIC 4248 4249 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4250 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4251 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4252 return true; 4253 } 4254 4255 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 4256 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4257 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4258 4259 link_key_t link_key; 4260 link_key_type_t link_key_type; 4261 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 4262 4263 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4264 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4265 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 4266 if (sc_downgrade){ 4267 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4268 connection->state = SENT_DISCONNECT; 4269 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4270 return true; 4271 } 4272 4273 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 4274 if (have_link_key && security_level_sufficient){ 4275 connection->link_key_type = link_key_type; 4276 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 4277 } else { 4278 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4279 } 4280 return true; 4281 } 4282 4283 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4284 log_info("denying to pin request"); 4285 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4286 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4287 return true; 4288 } 4289 4290 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4291 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4292 // tweak authentication requirements 4293 uint8_t authreq = hci_stack->ssp_authentication_requirement; 4294 if (connection->bonding_flags & BONDING_DEDICATED){ 4295 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4296 } 4297 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4298 authreq |= 1; 4299 } 4300 uint8_t have_oob_data = 0; 4301 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4302 if (connection->classic_oob_c_192 != NULL){ 4303 have_oob_data |= 1; 4304 } 4305 if (connection->classic_oob_c_256 != NULL){ 4306 have_oob_data |= 2; 4307 } 4308 #endif 4309 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4310 return true; 4311 } 4312 4313 if (connection->authentication_flags & SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4314 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4315 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4316 return true; 4317 } 4318 4319 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4320 if (connection->authentication_flags & SEND_REMOTE_OOB_DATA_REPLY){ 4321 connectionClearAuthenticationFlags(connection, SEND_REMOTE_OOB_DATA_REPLY); 4322 const uint8_t zero[16] = { 0 }; 4323 const uint8_t * r_192 = zero; 4324 const uint8_t * c_192 = zero; 4325 const uint8_t * r_256 = zero; 4326 const uint8_t * c_256 = zero; 4327 // verify P-256 OOB 4328 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4329 c_256 = connection->classic_oob_c_256; 4330 if (connection->classic_oob_r_256 != NULL) { 4331 r_256 = connection->classic_oob_r_256; 4332 } 4333 } 4334 // verify P-192 OOB 4335 if ((connection->classic_oob_c_192 != NULL)) { 4336 c_192 = connection->classic_oob_c_192; 4337 if (connection->classic_oob_r_192 != NULL) { 4338 r_192 = connection->classic_oob_r_192; 4339 } 4340 } 4341 // Reply 4342 if (c_256 != zero) { 4343 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4344 } else if (c_192 != zero){ 4345 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4346 } else { 4347 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4348 } 4349 return true; 4350 } 4351 #endif 4352 4353 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4354 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4355 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4356 return true; 4357 } 4358 4359 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4360 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4361 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4362 return true; 4363 } 4364 4365 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4366 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4367 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4368 return true; 4369 } 4370 4371 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4372 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4373 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4374 return true; 4375 } 4376 4377 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4378 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4379 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4380 return true; 4381 } 4382 4383 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4384 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4385 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4386 connection->state = SENT_DISCONNECT; 4387 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4388 return true; 4389 } 4390 4391 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4392 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4393 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4394 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4395 return true; 4396 } 4397 4398 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4399 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4400 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4401 return true; 4402 } 4403 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4404 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4405 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4406 return true; 4407 } 4408 #endif 4409 4410 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4411 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4412 if (connection->state != SENT_DISCONNECT){ 4413 connection->state = SENT_DISCONNECT; 4414 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4415 return true; 4416 } 4417 } 4418 4419 #ifdef ENABLE_CLASSIC 4420 uint16_t sniff_min_interval; 4421 switch (connection->sniff_min_interval){ 4422 case 0: 4423 break; 4424 case 0xffff: 4425 connection->sniff_min_interval = 0; 4426 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4427 return true; 4428 default: 4429 sniff_min_interval = connection->sniff_min_interval; 4430 connection->sniff_min_interval = 0; 4431 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4432 return true; 4433 } 4434 4435 if (connection->request_role != HCI_ROLE_INVALID){ 4436 hci_role_t role = connection->request_role; 4437 connection->request_role = HCI_ROLE_INVALID; 4438 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4439 return true; 4440 } 4441 #endif 4442 4443 #ifdef ENABLE_BLE 4444 switch (connection->le_con_parameter_update_state){ 4445 // response to L2CAP CON PARAMETER UPDATE REQUEST 4446 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4447 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4448 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4449 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4450 0x0000, 0xffff); 4451 return true; 4452 case CON_PARAMETER_UPDATE_REPLY: 4453 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4454 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4455 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4456 0x0000, 0xffff); 4457 return true; 4458 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4459 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4460 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4461 return true; 4462 default: 4463 break; 4464 } 4465 if (connection->le_phy_update_all_phys != 0xffu){ 4466 uint8_t all_phys = connection->le_phy_update_all_phys; 4467 connection->le_phy_update_all_phys = 0xff; 4468 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); 4469 return true; 4470 } 4471 #endif 4472 } 4473 return false; 4474 } 4475 4476 static void hci_run(void){ 4477 4478 bool done; 4479 4480 // send continuation fragments first, as they block the prepared packet buffer 4481 done = hci_run_acl_fragments(); 4482 if (done) return; 4483 4484 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4485 // send host num completed packets next as they don't require num_cmd_packets > 0 4486 if (!hci_can_send_comand_packet_transport()) return; 4487 if (hci_stack->host_completed_packets){ 4488 hci_host_num_completed_packets(); 4489 return; 4490 } 4491 #endif 4492 4493 if (!hci_can_send_command_packet_now()) return; 4494 4495 // global/non-connection oriented commands 4496 4497 4498 #ifdef ENABLE_CLASSIC 4499 // general gap classic 4500 done = hci_run_general_gap_classic(); 4501 if (done) return; 4502 #endif 4503 4504 #ifdef ENABLE_BLE 4505 // general gap le 4506 done = hci_run_general_gap_le(); 4507 if (done) return; 4508 #endif 4509 4510 // send pending HCI commands 4511 done = hci_run_general_pending_commands(); 4512 if (done) return; 4513 4514 // stack state sub statemachines 4515 hci_connection_t * connection; 4516 switch (hci_stack->state){ 4517 case HCI_STATE_INITIALIZING: 4518 hci_initializing_run(); 4519 break; 4520 4521 case HCI_STATE_HALTING: 4522 4523 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4524 switch (hci_stack->substate){ 4525 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4526 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4527 4528 #ifdef ENABLE_BLE 4529 #ifdef ENABLE_LE_CENTRAL 4530 // free whitelist entries 4531 { 4532 btstack_linked_list_iterator_t lit; 4533 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4534 while (btstack_linked_list_iterator_has_next(&lit)){ 4535 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4536 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4537 btstack_memory_whitelist_entry_free(entry); 4538 } 4539 } 4540 #endif 4541 #endif 4542 // close all open connections 4543 connection = (hci_connection_t *) hci_stack->connections; 4544 if (connection){ 4545 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4546 if (!hci_can_send_command_packet_now()) return; 4547 4548 // check state 4549 if (connection->state == SENT_DISCONNECT) return; 4550 connection->state = SENT_DISCONNECT; 4551 4552 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4553 4554 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4555 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4556 4557 // ... which would be ignored anyway as we shutdown (free) the connection now 4558 hci_shutdown_connection(connection); 4559 4560 // finally, send the disconnect command 4561 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4562 return; 4563 } 4564 4565 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4566 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4567 log_info("HCI_STATE_HALTING: wait 50 ms"); 4568 hci_stack->substate = HCI_HALTING_W4_TIMER; 4569 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4570 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4571 btstack_run_loop_add_timer(&hci_stack->timeout); 4572 break; 4573 } 4574 4575 /* fall through */ 4576 4577 case HCI_HALTING_CLOSE: 4578 log_info("HCI_STATE_HALTING, calling off"); 4579 4580 // switch mode 4581 hci_power_control_off(); 4582 4583 log_info("HCI_STATE_HALTING, emitting state"); 4584 hci_emit_state(); 4585 log_info("HCI_STATE_HALTING, done"); 4586 break; 4587 4588 case HCI_HALTING_W4_TIMER: 4589 // keep waiting 4590 4591 break; 4592 default: 4593 break; 4594 } 4595 4596 break; 4597 4598 case HCI_STATE_FALLING_ASLEEP: 4599 switch(hci_stack->substate) { 4600 case HCI_FALLING_ASLEEP_DISCONNECT: 4601 log_info("HCI_STATE_FALLING_ASLEEP"); 4602 // close all open connections 4603 connection = (hci_connection_t *) hci_stack->connections; 4604 4605 #ifdef HAVE_PLATFORM_IPHONE_OS 4606 // don't close connections, if H4 supports power management 4607 if (btstack_control_iphone_power_management_enabled()){ 4608 connection = NULL; 4609 } 4610 #endif 4611 if (connection){ 4612 4613 // send disconnect 4614 if (!hci_can_send_command_packet_now()) return; 4615 4616 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4617 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4618 4619 // send disconnected event right away - causes higher layer connections to get closed, too. 4620 hci_shutdown_connection(connection); 4621 return; 4622 } 4623 4624 if (hci_classic_supported()){ 4625 // disable page and inquiry scan 4626 if (!hci_can_send_command_packet_now()) return; 4627 4628 log_info("HCI_STATE_HALTING, disabling inq scans"); 4629 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4630 4631 // continue in next sub state 4632 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4633 break; 4634 } 4635 4636 /* fall through */ 4637 4638 case HCI_FALLING_ASLEEP_COMPLETE: 4639 log_info("HCI_STATE_HALTING, calling sleep"); 4640 #ifdef HAVE_PLATFORM_IPHONE_OS 4641 // don't actually go to sleep, if H4 supports power management 4642 if (btstack_control_iphone_power_management_enabled()){ 4643 // SLEEP MODE reached 4644 hci_stack->state = HCI_STATE_SLEEPING; 4645 hci_emit_state(); 4646 break; 4647 } 4648 #endif 4649 // switch mode 4650 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4651 hci_emit_state(); 4652 break; 4653 4654 default: 4655 break; 4656 } 4657 break; 4658 4659 default: 4660 break; 4661 } 4662 } 4663 4664 int hci_send_cmd_packet(uint8_t *packet, int size){ 4665 // house-keeping 4666 4667 #ifdef ENABLE_CLASSIC 4668 bd_addr_t addr; 4669 hci_connection_t * conn; 4670 #endif 4671 #ifdef ENABLE_LE_CENTRAL 4672 uint8_t initiator_filter_policy; 4673 #endif 4674 4675 uint16_t opcode = little_endian_read_16(packet, 0); 4676 switch (opcode) { 4677 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4678 hci_stack->loopback_mode = packet[3]; 4679 break; 4680 4681 #ifdef ENABLE_CLASSIC 4682 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4683 reverse_bd_addr(&packet[3], addr); 4684 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4685 4686 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4687 if (!conn) { 4688 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4689 if (!conn) { 4690 // notify client that alloc failed 4691 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4692 return -1; // packet not sent to controller 4693 } 4694 conn->state = SEND_CREATE_CONNECTION; 4695 conn->role = HCI_ROLE_MASTER; 4696 } 4697 log_info("conn state %u", conn->state); 4698 switch (conn->state) { 4699 // if connection active exists 4700 case OPEN: 4701 // and OPEN, emit connection complete command 4702 hci_emit_connection_complete(addr, conn->con_handle, 0); 4703 return -1; // packet not sent to controller 4704 case RECEIVED_DISCONNECTION_COMPLETE: 4705 // create connection triggered in disconnect complete event, let's do it now 4706 break; 4707 case SEND_CREATE_CONNECTION: 4708 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4709 break; 4710 default: 4711 // otherwise, just ignore as it is already in the open process 4712 return -1; // packet not sent to controller 4713 } 4714 conn->state = SENT_CREATE_CONNECTION; 4715 4716 // track outgoing connection 4717 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4718 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4719 break; 4720 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4721 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4722 break; 4723 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4724 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4725 break; 4726 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4727 if (hci_stack->link_key_db) { 4728 reverse_bd_addr(&packet[3], addr); 4729 hci_stack->link_key_db->delete_link_key(addr); 4730 } 4731 break; 4732 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4733 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4734 reverse_bd_addr(&packet[3], addr); 4735 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4736 if (conn) { 4737 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4738 } 4739 break; 4740 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4741 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4742 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4743 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4744 reverse_bd_addr(&packet[3], addr); 4745 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4746 if (conn) { 4747 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4748 } 4749 break; 4750 4751 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 4752 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4753 // setup_synchronous_connection? Voice setting at offset 22 4754 // TODO: compare to current setting if sco connection already active 4755 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4756 break; 4757 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4758 // accept_synchronus_connection? Voice setting at offset 18 4759 // TODO: compare to current setting if sco connection already active 4760 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4761 break; 4762 #endif 4763 #endif 4764 4765 #ifdef ENABLE_BLE 4766 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4767 hci_stack->le_random_address_set = 1; 4768 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4769 break; 4770 #ifdef ENABLE_LE_PERIPHERAL 4771 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4772 hci_stack->le_advertisements_active = packet[3] != 0; 4773 break; 4774 #endif 4775 #ifdef ENABLE_LE_CENTRAL 4776 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4777 // white list used? 4778 initiator_filter_policy = packet[7]; 4779 switch (initiator_filter_policy) { 4780 case 0: 4781 // whitelist not used 4782 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4783 break; 4784 case 1: 4785 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4786 break; 4787 default: 4788 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4789 break; 4790 } 4791 // track outgoing connection 4792 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 4793 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 4794 break; 4795 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4796 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 4797 break; 4798 #endif 4799 #endif 4800 default: 4801 break; 4802 } 4803 4804 hci_stack->num_cmd_packets--; 4805 4806 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4807 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4808 } 4809 4810 // disconnect because of security block 4811 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4812 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4813 if (!connection) return; 4814 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4815 } 4816 4817 4818 // Configure Secure Simple Pairing 4819 4820 #ifdef ENABLE_CLASSIC 4821 4822 // enable will enable SSP during init 4823 void gap_ssp_set_enable(int enable){ 4824 hci_stack->ssp_enable = enable; 4825 } 4826 4827 static int hci_local_ssp_activated(void){ 4828 return gap_ssp_supported() && hci_stack->ssp_enable; 4829 } 4830 4831 // if set, BTstack will respond to io capability request using authentication requirement 4832 void gap_ssp_set_io_capability(int io_capability){ 4833 hci_stack->ssp_io_capability = io_capability; 4834 } 4835 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4836 hci_stack->ssp_authentication_requirement = authentication_requirement; 4837 } 4838 4839 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4840 void gap_ssp_set_auto_accept(int auto_accept){ 4841 hci_stack->ssp_auto_accept = auto_accept; 4842 } 4843 4844 void gap_secure_connections_enable(bool enable){ 4845 hci_stack->secure_connections_enable = enable; 4846 } 4847 4848 #endif 4849 4850 // va_list part of hci_send_cmd 4851 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4852 if (!hci_can_send_command_packet_now()){ 4853 log_error("hci_send_cmd called but cannot send packet now"); 4854 return 0; 4855 } 4856 4857 // for HCI INITIALIZATION 4858 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4859 hci_stack->last_cmd_opcode = cmd->opcode; 4860 4861 hci_reserve_packet_buffer(); 4862 uint8_t * packet = hci_stack->hci_packet_buffer; 4863 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4864 int err = hci_send_cmd_packet(packet, size); 4865 4866 // release packet buffer on error or for synchronous transport implementations 4867 if ((err < 0) || hci_transport_synchronous()){ 4868 hci_release_packet_buffer(); 4869 hci_emit_transport_packet_sent(); 4870 } 4871 4872 return err; 4873 } 4874 4875 /** 4876 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4877 */ 4878 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4879 va_list argptr; 4880 va_start(argptr, cmd); 4881 int res = hci_send_cmd_va_arg(cmd, argptr); 4882 va_end(argptr); 4883 return res; 4884 } 4885 4886 // Create various non-HCI events. 4887 // TODO: generalize, use table similar to hci_create_command 4888 4889 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4890 // dump packet 4891 if (dump) { 4892 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4893 } 4894 4895 // dispatch to all event handlers 4896 btstack_linked_list_iterator_t it; 4897 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4898 while (btstack_linked_list_iterator_has_next(&it)){ 4899 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4900 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4901 } 4902 } 4903 4904 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4905 if (!hci_stack->acl_packet_handler) return; 4906 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4907 } 4908 4909 #ifdef ENABLE_CLASSIC 4910 static void hci_notify_if_sco_can_send_now(void){ 4911 // notify SCO sender if waiting 4912 if (!hci_stack->sco_waiting_for_can_send_now) return; 4913 if (hci_can_send_sco_packet_now()){ 4914 hci_stack->sco_waiting_for_can_send_now = 0; 4915 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4916 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4917 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4918 } 4919 } 4920 4921 // parsing end emitting has been merged to reduce code size 4922 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4923 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4924 4925 uint8_t * eir_data; 4926 ad_context_t context; 4927 const uint8_t * name; 4928 uint8_t name_len; 4929 4930 if (size < 3) return; 4931 4932 int event_type = hci_event_packet_get_type(packet); 4933 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4934 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4935 4936 switch (event_type){ 4937 case HCI_EVENT_INQUIRY_RESULT: 4938 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4939 if (size != (3 + (num_responses * 14))) return; 4940 break; 4941 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4942 if (size != 257) return; 4943 if (num_responses != 1) return; 4944 break; 4945 default: 4946 return; 4947 } 4948 4949 // event[1] is set at the end 4950 int i; 4951 for (i=0; i<num_responses;i++){ 4952 memset(event, 0, sizeof(event)); 4953 event[0] = GAP_EVENT_INQUIRY_RESULT; 4954 uint8_t event_size = 18; // if name is not set by EIR 4955 4956 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4957 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4958 (void)memcpy(&event[9], 4959 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4960 3); // class of device 4961 (void)memcpy(&event[12], 4962 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4963 2); // clock offset 4964 4965 switch (event_type){ 4966 case HCI_EVENT_INQUIRY_RESULT: 4967 // 14,15,16,17 = 0, size 18 4968 break; 4969 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4970 event[14] = 1; 4971 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4972 // 16,17 = 0, size 18 4973 break; 4974 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4975 event[14] = 1; 4976 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4977 // EIR packets only contain a single inquiry response 4978 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4979 name = NULL; 4980 // Iterate over EIR data 4981 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4982 uint8_t data_type = ad_iterator_get_data_type(&context); 4983 uint8_t data_size = ad_iterator_get_data_len(&context); 4984 const uint8_t * data = ad_iterator_get_data(&context); 4985 // Prefer Complete Local Name over Shortend Local Name 4986 switch (data_type){ 4987 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4988 if (name) continue; 4989 /* fall through */ 4990 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4991 name = data; 4992 name_len = data_size; 4993 break; 4994 default: 4995 break; 4996 } 4997 } 4998 if (name){ 4999 event[16] = 1; 5000 // truncate name if needed 5001 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5002 event[17] = len; 5003 (void)memcpy(&event[18], name, len); 5004 event_size += len; 5005 } 5006 break; 5007 default: 5008 return; 5009 } 5010 event[1] = event_size - 2; 5011 hci_emit_event(event, event_size, 1); 5012 } 5013 } 5014 #endif 5015 5016 void hci_emit_state(void){ 5017 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5018 uint8_t event[3]; 5019 event[0] = BTSTACK_EVENT_STATE; 5020 event[1] = sizeof(event) - 2u; 5021 event[2] = hci_stack->state; 5022 hci_emit_event(event, sizeof(event), 1); 5023 } 5024 5025 #ifdef ENABLE_CLASSIC 5026 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5027 uint8_t event[13]; 5028 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5029 event[1] = sizeof(event) - 2; 5030 event[2] = status; 5031 little_endian_store_16(event, 3, con_handle); 5032 reverse_bd_addr(address, &event[5]); 5033 event[11] = 1; // ACL connection 5034 event[12] = 0; // encryption disabled 5035 hci_emit_event(event, sizeof(event), 1); 5036 } 5037 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5038 if (disable_l2cap_timeouts) return; 5039 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5040 uint8_t event[4]; 5041 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5042 event[1] = sizeof(event) - 2; 5043 little_endian_store_16(event, 2, conn->con_handle); 5044 hci_emit_event(event, sizeof(event), 1); 5045 } 5046 #endif 5047 5048 #ifdef ENABLE_BLE 5049 #ifdef ENABLE_LE_CENTRAL 5050 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){ 5051 uint8_t event[21]; 5052 event[0] = HCI_EVENT_LE_META; 5053 event[1] = sizeof(event) - 2u; 5054 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5055 event[3] = status; 5056 little_endian_store_16(event, 4, con_handle); 5057 event[6] = 0; // TODO: role 5058 event[7] = address_type; 5059 reverse_bd_addr(address, &event[8]); 5060 little_endian_store_16(event, 14, 0); // interval 5061 little_endian_store_16(event, 16, 0); // latency 5062 little_endian_store_16(event, 18, 0); // supervision timeout 5063 event[20] = 0; // master clock accuracy 5064 hci_emit_event(event, sizeof(event), 1); 5065 } 5066 #endif 5067 #endif 5068 5069 static void hci_emit_transport_packet_sent(void){ 5070 // notify upper stack that it might be possible to send again 5071 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5072 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5073 } 5074 5075 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5076 uint8_t event[6]; 5077 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5078 event[1] = sizeof(event) - 2u; 5079 event[2] = 0; // status = OK 5080 little_endian_store_16(event, 3, con_handle); 5081 event[5] = reason; 5082 hci_emit_event(event, sizeof(event), 1); 5083 } 5084 5085 static void hci_emit_nr_connections_changed(void){ 5086 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5087 uint8_t event[3]; 5088 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5089 event[1] = sizeof(event) - 2u; 5090 event[2] = nr_hci_connections(); 5091 hci_emit_event(event, sizeof(event), 1); 5092 } 5093 5094 static void hci_emit_hci_open_failed(void){ 5095 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5096 uint8_t event[2]; 5097 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5098 event[1] = sizeof(event) - 2u; 5099 hci_emit_event(event, sizeof(event), 1); 5100 } 5101 5102 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5103 log_info("hci_emit_dedicated_bonding_result %u ", status); 5104 uint8_t event[9]; 5105 int pos = 0; 5106 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5107 event[pos++] = sizeof(event) - 2u; 5108 event[pos++] = status; 5109 reverse_bd_addr(address, &event[pos]); 5110 hci_emit_event(event, sizeof(event), 1); 5111 } 5112 5113 5114 #ifdef ENABLE_CLASSIC 5115 5116 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5117 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5118 uint8_t event[5]; 5119 int pos = 0; 5120 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5121 event[pos++] = sizeof(event) - 2; 5122 little_endian_store_16(event, 2, con_handle); 5123 pos += 2; 5124 event[pos++] = level; 5125 hci_emit_event(event, sizeof(event), 1); 5126 } 5127 5128 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5129 if (!connection) return LEVEL_0; 5130 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5131 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5132 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5133 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5134 // LEVEL 4 always requires 128 bit encrytion key size 5135 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5136 security_level = LEVEL_3; 5137 } 5138 return security_level; 5139 } 5140 5141 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5142 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5143 uint8_t event[3]; 5144 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5145 event[1] = sizeof(event) - 2; 5146 event[2] = enabled; 5147 hci_emit_event(event, sizeof(event), 1); 5148 } 5149 5150 // query if remote side supports eSCO 5151 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5152 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5153 if (!connection) return 0; 5154 return (connection->remote_supported_features[0] & 1) != 0; 5155 } 5156 5157 static bool hci_ssp_supported(hci_connection_t * connection){ 5158 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5159 return (connection->bonding_flags & mask) == mask; 5160 } 5161 5162 // query if remote side supports SSP 5163 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5164 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5165 if (!connection) return 0; 5166 return hci_ssp_supported(connection) ? 1 : 0; 5167 } 5168 5169 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5170 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5171 } 5172 5173 // GAP API 5174 /** 5175 * @bbrief enable/disable bonding. default is enabled 5176 * @praram enabled 5177 */ 5178 void gap_set_bondable_mode(int enable){ 5179 hci_stack->bondable = enable ? 1 : 0; 5180 } 5181 /** 5182 * @brief Get bondable mode. 5183 * @return 1 if bondable 5184 */ 5185 int gap_get_bondable_mode(void){ 5186 return hci_stack->bondable; 5187 } 5188 5189 /** 5190 * @brief map link keys to security levels 5191 */ 5192 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5193 switch (link_key_type){ 5194 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5195 return LEVEL_4; 5196 case COMBINATION_KEY: 5197 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5198 return LEVEL_3; 5199 default: 5200 return LEVEL_2; 5201 } 5202 } 5203 5204 /** 5205 * @brief map link keys to secure connection yes/no 5206 */ 5207 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5208 switch (link_key_type){ 5209 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5210 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5211 return 1; 5212 default: 5213 return 0; 5214 } 5215 } 5216 5217 /** 5218 * @brief map link keys to authenticated 5219 */ 5220 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5221 switch (link_key_type){ 5222 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5223 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5224 return 1; 5225 default: 5226 return 0; 5227 } 5228 } 5229 5230 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5231 log_info("gap_mitm_protection_required_for_security_level %u", level); 5232 return level > LEVEL_2; 5233 } 5234 5235 /** 5236 * @brief get current security level 5237 */ 5238 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5239 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5240 if (!connection) return LEVEL_0; 5241 return gap_security_level_for_connection(connection); 5242 } 5243 5244 /** 5245 * @brief request connection to device to 5246 * @result GAP_AUTHENTICATION_RESULT 5247 */ 5248 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5249 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5250 if (!connection){ 5251 hci_emit_security_level(con_handle, LEVEL_0); 5252 return; 5253 } 5254 5255 btstack_assert(hci_is_le_connection(connection) == false); 5256 5257 gap_security_level_t current_level = gap_security_level(con_handle); 5258 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5259 requested_level, connection->requested_security_level, current_level); 5260 5261 // assumption: earlier requested security higher than current level => security request is active 5262 if (current_level < connection->requested_security_level){ 5263 if (connection->requested_security_level < requested_level){ 5264 // increase requested level as new level is higher 5265 5266 // TODO: handle re-authentication when done 5267 5268 connection->requested_security_level = requested_level; 5269 } 5270 return; 5271 } 5272 5273 // no request active, notify if security sufficient 5274 if (requested_level <= current_level){ 5275 hci_emit_security_level(con_handle, current_level); 5276 return; 5277 } 5278 5279 // store request 5280 connection->requested_security_level = requested_level; 5281 5282 // start to authenticate connection if authentication not already active 5283 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 5284 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5285 hci_run(); 5286 } 5287 5288 /** 5289 * @brief start dedicated bonding with device. disconnect after bonding 5290 * @param device 5291 * @param request MITM protection 5292 * @result GAP_DEDICATED_BONDING_COMPLETE 5293 */ 5294 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5295 5296 // create connection state machine 5297 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5298 5299 if (!connection){ 5300 return BTSTACK_MEMORY_ALLOC_FAILED; 5301 } 5302 5303 // delete linkn key 5304 gap_drop_link_key_for_bd_addr(device); 5305 5306 // configure LEVEL_2/3, dedicated bonding 5307 connection->state = SEND_CREATE_CONNECTION; 5308 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5309 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5310 connection->bonding_flags = BONDING_DEDICATED; 5311 5312 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5313 5314 // handle: connnection failure (connection complete != ok) 5315 // handle: authentication failure 5316 // handle: disconnect on done 5317 5318 hci_run(); 5319 5320 return 0; 5321 } 5322 #endif 5323 5324 void gap_set_local_name(const char * local_name){ 5325 hci_stack->local_name = local_name; 5326 } 5327 5328 5329 #ifdef ENABLE_BLE 5330 5331 #ifdef ENABLE_LE_CENTRAL 5332 void gap_start_scan(void){ 5333 hci_stack->le_scanning_enabled = true; 5334 hci_run(); 5335 } 5336 5337 void gap_stop_scan(void){ 5338 hci_stack->le_scanning_enabled = false; 5339 hci_run(); 5340 } 5341 5342 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5343 hci_stack->le_scan_type = scan_type; 5344 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5345 hci_stack->le_scan_interval = scan_interval; 5346 hci_stack->le_scan_window = scan_window; 5347 hci_stack->le_scanning_param_update = true; 5348 hci_run(); 5349 } 5350 5351 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5352 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5353 } 5354 5355 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5356 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5357 if (!conn){ 5358 // disallow if le connection is already outgoing 5359 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5360 log_error("le connection already active"); 5361 return ERROR_CODE_COMMAND_DISALLOWED; 5362 } 5363 5364 log_info("gap_connect: no connection exists yet, creating context"); 5365 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5366 if (!conn){ 5367 // notify client that alloc failed 5368 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5369 log_info("gap_connect: failed to alloc hci_connection_t"); 5370 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5371 } 5372 5373 // set le connecting state 5374 if (hci_is_le_connection_type(addr_type)){ 5375 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5376 } 5377 5378 conn->state = SEND_CREATE_CONNECTION; 5379 log_info("gap_connect: send create connection next"); 5380 hci_run(); 5381 return ERROR_CODE_SUCCESS; 5382 } 5383 5384 if (!hci_is_le_connection(conn) || 5385 (conn->state == SEND_CREATE_CONNECTION) || 5386 (conn->state == SENT_CREATE_CONNECTION)) { 5387 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5388 log_error("gap_connect: classic connection or connect is already being created"); 5389 return GATT_CLIENT_IN_WRONG_STATE; 5390 } 5391 5392 // check if connection was just disconnected 5393 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5394 log_info("gap_connect: send create connection (again)"); 5395 conn->state = SEND_CREATE_CONNECTION; 5396 hci_run(); 5397 return ERROR_CODE_SUCCESS; 5398 } 5399 5400 log_info("gap_connect: context exists with state %u", conn->state); 5401 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5402 hci_run(); 5403 return ERROR_CODE_SUCCESS; 5404 } 5405 5406 // @assumption: only a single outgoing LE Connection exists 5407 static hci_connection_t * gap_get_outgoing_connection(void){ 5408 btstack_linked_item_t *it; 5409 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5410 hci_connection_t * conn = (hci_connection_t *) it; 5411 if (!hci_is_le_connection(conn)) continue; 5412 switch (conn->state){ 5413 case SEND_CREATE_CONNECTION: 5414 case SENT_CREATE_CONNECTION: 5415 case SENT_CANCEL_CONNECTION: 5416 return conn; 5417 default: 5418 break; 5419 }; 5420 } 5421 return NULL; 5422 } 5423 5424 uint8_t gap_connect_cancel(void){ 5425 hci_connection_t * conn = gap_get_outgoing_connection(); 5426 if (!conn) return 0; 5427 switch (conn->state){ 5428 case SEND_CREATE_CONNECTION: 5429 // skip sending create connection and emit event instead 5430 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5431 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5432 btstack_memory_hci_connection_free( conn ); 5433 break; 5434 case SENT_CREATE_CONNECTION: 5435 // request to send cancel connection 5436 conn->state = SEND_CANCEL_CONNECTION; 5437 hci_run(); 5438 break; 5439 default: 5440 break; 5441 } 5442 return 0; 5443 } 5444 #endif 5445 5446 #ifdef ENABLE_LE_CENTRAL 5447 /** 5448 * @brief Set connection parameters for outgoing connections 5449 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5450 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5451 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5452 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5453 * @param conn_latency, default: 4 5454 * @param supervision_timeout (unit: 10ms), default: 720 ms 5455 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5456 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5457 */ 5458 5459 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5460 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5461 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5462 hci_stack->le_connection_scan_interval = conn_scan_interval; 5463 hci_stack->le_connection_scan_window = conn_scan_window; 5464 hci_stack->le_connection_interval_min = conn_interval_min; 5465 hci_stack->le_connection_interval_max = conn_interval_max; 5466 hci_stack->le_connection_latency = conn_latency; 5467 hci_stack->le_supervision_timeout = supervision_timeout; 5468 hci_stack->le_minimum_ce_length = min_ce_length; 5469 hci_stack->le_maximum_ce_length = max_ce_length; 5470 } 5471 #endif 5472 5473 /** 5474 * @brief Updates the connection parameters for a given LE connection 5475 * @param handle 5476 * @param conn_interval_min (unit: 1.25ms) 5477 * @param conn_interval_max (unit: 1.25ms) 5478 * @param conn_latency 5479 * @param supervision_timeout (unit: 10ms) 5480 * @returns 0 if ok 5481 */ 5482 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5483 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5484 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5485 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5486 connection->le_conn_interval_min = conn_interval_min; 5487 connection->le_conn_interval_max = conn_interval_max; 5488 connection->le_conn_latency = conn_latency; 5489 connection->le_supervision_timeout = supervision_timeout; 5490 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5491 hci_run(); 5492 return 0; 5493 } 5494 5495 /** 5496 * @brief Request an update of the connection parameter for a given LE connection 5497 * @param handle 5498 * @param conn_interval_min (unit: 1.25ms) 5499 * @param conn_interval_max (unit: 1.25ms) 5500 * @param conn_latency 5501 * @param supervision_timeout (unit: 10ms) 5502 * @returns 0 if ok 5503 */ 5504 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5505 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5506 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5507 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5508 connection->le_conn_interval_min = conn_interval_min; 5509 connection->le_conn_interval_max = conn_interval_max; 5510 connection->le_conn_latency = conn_latency; 5511 connection->le_supervision_timeout = supervision_timeout; 5512 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5513 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5514 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5515 return 0; 5516 } 5517 5518 #ifdef ENABLE_LE_PERIPHERAL 5519 5520 /** 5521 * @brief Set Advertisement Data 5522 * @param advertising_data_length 5523 * @param advertising_data (max 31 octets) 5524 * @note data is not copied, pointer has to stay valid 5525 */ 5526 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5527 hci_stack->le_advertisements_data_len = advertising_data_length; 5528 hci_stack->le_advertisements_data = advertising_data; 5529 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5530 hci_run(); 5531 } 5532 5533 /** 5534 * @brief Set Scan Response Data 5535 * @param advertising_data_length 5536 * @param advertising_data (max 31 octets) 5537 * @note data is not copied, pointer has to stay valid 5538 */ 5539 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5540 hci_stack->le_scan_response_data_len = scan_response_data_length; 5541 hci_stack->le_scan_response_data = scan_response_data; 5542 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5543 hci_run(); 5544 } 5545 5546 /** 5547 * @brief Set Advertisement Parameters 5548 * @param adv_int_min 5549 * @param adv_int_max 5550 * @param adv_type 5551 * @param direct_address_type 5552 * @param direct_address 5553 * @param channel_map 5554 * @param filter_policy 5555 * 5556 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5557 */ 5558 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5559 uint8_t direct_address_typ, bd_addr_t direct_address, 5560 uint8_t channel_map, uint8_t filter_policy) { 5561 5562 hci_stack->le_advertisements_interval_min = adv_int_min; 5563 hci_stack->le_advertisements_interval_max = adv_int_max; 5564 hci_stack->le_advertisements_type = adv_type; 5565 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5566 hci_stack->le_advertisements_channel_map = channel_map; 5567 hci_stack->le_advertisements_filter_policy = filter_policy; 5568 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5569 6); 5570 5571 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5572 hci_run(); 5573 } 5574 5575 /** 5576 * @brief Enable/Disable Advertisements 5577 * @param enabled 5578 */ 5579 void gap_advertisements_enable(int enabled){ 5580 hci_stack->le_advertisements_enabled = enabled != 0; 5581 hci_update_advertisements_enabled_for_current_roles(); 5582 hci_run(); 5583 } 5584 5585 #endif 5586 5587 void hci_le_set_own_address_type(uint8_t own_address_type){ 5588 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5589 if (own_address_type == hci_stack->le_own_addr_type) return; 5590 hci_stack->le_own_addr_type = own_address_type; 5591 5592 #ifdef ENABLE_LE_PERIPHERAL 5593 // update advertisement parameters, too 5594 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5595 hci_run(); 5596 #endif 5597 #ifdef ENABLE_LE_CENTRAL 5598 // note: we don't update scan parameters or modify ongoing connection attempts 5599 #endif 5600 } 5601 5602 #endif 5603 5604 uint8_t gap_disconnect(hci_con_handle_t handle){ 5605 hci_connection_t * conn = hci_connection_for_handle(handle); 5606 if (!conn){ 5607 hci_emit_disconnection_complete(handle, 0); 5608 return 0; 5609 } 5610 // ignore if already disconnected 5611 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5612 return 0; 5613 } 5614 conn->state = SEND_DISCONNECT; 5615 hci_run(); 5616 return 0; 5617 } 5618 5619 int gap_read_rssi(hci_con_handle_t con_handle){ 5620 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5621 if (hci_connection == NULL) return 0; 5622 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5623 hci_run(); 5624 return 1; 5625 } 5626 5627 /** 5628 * @brief Get connection type 5629 * @param con_handle 5630 * @result connection_type 5631 */ 5632 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5633 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5634 if (!conn) return GAP_CONNECTION_INVALID; 5635 switch (conn->address_type){ 5636 case BD_ADDR_TYPE_LE_PUBLIC: 5637 case BD_ADDR_TYPE_LE_RANDOM: 5638 return GAP_CONNECTION_LE; 5639 case BD_ADDR_TYPE_SCO: 5640 return GAP_CONNECTION_SCO; 5641 case BD_ADDR_TYPE_ACL: 5642 return GAP_CONNECTION_ACL; 5643 default: 5644 return GAP_CONNECTION_INVALID; 5645 } 5646 } 5647 5648 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5649 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5650 if (!conn) return HCI_ROLE_INVALID; 5651 return (hci_role_t) conn->role; 5652 } 5653 5654 5655 #ifdef ENABLE_CLASSIC 5656 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5657 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5658 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5659 conn->request_role = role; 5660 hci_run(); 5661 return ERROR_CODE_SUCCESS; 5662 } 5663 #endif 5664 5665 #ifdef ENABLE_BLE 5666 5667 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){ 5668 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5669 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5670 5671 conn->le_phy_update_all_phys = all_phys; 5672 conn->le_phy_update_tx_phys = tx_phys; 5673 conn->le_phy_update_rx_phys = rx_phys; 5674 conn->le_phy_update_phy_options = phy_options; 5675 5676 hci_run(); 5677 5678 return 0; 5679 } 5680 5681 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5682 // check if already in list 5683 btstack_linked_list_iterator_t it; 5684 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5685 while (btstack_linked_list_iterator_has_next(&it)) { 5686 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5687 if (entry->address_type != address_type) { 5688 continue; 5689 } 5690 if (memcmp(entry->address, address, 6) != 0) { 5691 continue; 5692 } 5693 // disallow if already scheduled to add 5694 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5695 return ERROR_CODE_COMMAND_DISALLOWED; 5696 } 5697 // still on controller, but scheduled to remove -> re-add 5698 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5699 return ERROR_CODE_SUCCESS; 5700 } 5701 // alloc and add to list 5702 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5703 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5704 entry->address_type = address_type; 5705 (void)memcpy(entry->address, address, 6); 5706 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5707 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5708 return ERROR_CODE_SUCCESS; 5709 } 5710 5711 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5712 btstack_linked_list_iterator_t it; 5713 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5714 while (btstack_linked_list_iterator_has_next(&it)){ 5715 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5716 if (entry->address_type != address_type) { 5717 continue; 5718 } 5719 if (memcmp(entry->address, address, 6) != 0) { 5720 continue; 5721 } 5722 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5723 // remove from controller if already present 5724 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5725 } else { 5726 // directly remove entry from whitelist 5727 btstack_linked_list_iterator_remove(&it); 5728 btstack_memory_whitelist_entry_free(entry); 5729 } 5730 return ERROR_CODE_SUCCESS; 5731 } 5732 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5733 } 5734 5735 static void hci_whitelist_clear(void){ 5736 btstack_linked_list_iterator_t it; 5737 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5738 while (btstack_linked_list_iterator_has_next(&it)){ 5739 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5740 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5741 // remove from controller if already present 5742 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5743 continue; 5744 } 5745 // directly remove entry from whitelist 5746 btstack_linked_list_iterator_remove(&it); 5747 btstack_memory_whitelist_entry_free(entry); 5748 } 5749 } 5750 5751 /** 5752 * @brief Clear Whitelist 5753 * @returns 0 if ok 5754 */ 5755 uint8_t gap_whitelist_clear(void){ 5756 hci_whitelist_clear(); 5757 hci_run(); 5758 return ERROR_CODE_SUCCESS; 5759 } 5760 5761 /** 5762 * @brief Add Device to Whitelist 5763 * @param address_typ 5764 * @param address 5765 * @returns 0 if ok 5766 */ 5767 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5768 uint8_t status = hci_whitelist_add(address_type, address); 5769 if (status){ 5770 return status; 5771 } 5772 hci_run(); 5773 return ERROR_CODE_SUCCESS; 5774 } 5775 5776 /** 5777 * @brief Remove Device from Whitelist 5778 * @param address_typ 5779 * @param address 5780 * @returns 0 if ok 5781 */ 5782 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5783 uint8_t status = hci_whitelist_remove(address_type, address); 5784 if (status){ 5785 return status; 5786 } 5787 hci_run(); 5788 return ERROR_CODE_SUCCESS; 5789 } 5790 5791 #ifdef ENABLE_LE_CENTRAL 5792 /** 5793 * @brief Connect with Whitelist 5794 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 5795 * @returns - if ok 5796 */ 5797 uint8_t gap_connect_with_whitelist(void){ 5798 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5799 return ERROR_CODE_COMMAND_DISALLOWED; 5800 } 5801 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5802 hci_run(); 5803 return ERROR_CODE_SUCCESS; 5804 } 5805 5806 /** 5807 * @brief Auto Connection Establishment - Start Connecting to device 5808 * @param address_typ 5809 * @param address 5810 * @returns 0 if ok 5811 */ 5812 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 5813 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5814 return ERROR_CODE_COMMAND_DISALLOWED; 5815 } 5816 5817 uint8_t status = hci_whitelist_add(address_type, address); 5818 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 5819 return status; 5820 } 5821 5822 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5823 5824 hci_run(); 5825 return ERROR_CODE_SUCCESS; 5826 } 5827 5828 /** 5829 * @brief Auto Connection Establishment - Stop Connecting to device 5830 * @param address_typ 5831 * @param address 5832 * @returns 0 if ok 5833 */ 5834 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 5835 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5836 return ERROR_CODE_COMMAND_DISALLOWED; 5837 } 5838 5839 hci_whitelist_remove(address_type, address); 5840 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 5841 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5842 } 5843 hci_run(); 5844 return 0; 5845 } 5846 5847 /** 5848 * @brief Auto Connection Establishment - Stop everything 5849 * @note Convenience function to stop all active auto connection attempts 5850 */ 5851 uint8_t gap_auto_connection_stop_all(void){ 5852 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 5853 return ERROR_CODE_COMMAND_DISALLOWED; 5854 } 5855 hci_whitelist_clear(); 5856 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5857 hci_run(); 5858 return ERROR_CODE_SUCCESS; 5859 } 5860 5861 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5862 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5863 if (!conn) return 0; 5864 return conn->le_connection_interval; 5865 } 5866 #endif 5867 #endif 5868 5869 #ifdef ENABLE_CLASSIC 5870 /** 5871 * @brief Set Extended Inquiry Response data 5872 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5873 * @note has to be done before stack starts up 5874 */ 5875 void gap_set_extended_inquiry_response(const uint8_t * data){ 5876 hci_stack->eir_data = data; 5877 } 5878 5879 /** 5880 * @brief Start GAP Classic Inquiry 5881 * @param duration in 1.28s units 5882 * @return 0 if ok 5883 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5884 */ 5885 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5886 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5887 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5888 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5889 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5890 } 5891 hci_stack->inquiry_state = duration_in_1280ms_units; 5892 hci_run(); 5893 return 0; 5894 } 5895 5896 /** 5897 * @brief Stop GAP Classic Inquiry 5898 * @returns 0 if ok 5899 */ 5900 int gap_inquiry_stop(void){ 5901 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5902 // emit inquiry complete event, before it even started 5903 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5904 hci_emit_event(event, sizeof(event), 1); 5905 return 0; 5906 } 5907 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5908 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5909 hci_run(); 5910 return 0; 5911 } 5912 5913 5914 /** 5915 * @brief Remote Name Request 5916 * @param addr 5917 * @param page_scan_repetition_mode 5918 * @param clock_offset only used when bit 15 is set 5919 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5920 */ 5921 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5922 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5923 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5924 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5925 hci_stack->remote_name_clock_offset = clock_offset; 5926 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5927 hci_run(); 5928 return 0; 5929 } 5930 5931 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 5932 hci_stack->gap_pairing_state = state; 5933 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5934 hci_run(); 5935 return 0; 5936 } 5937 5938 /** 5939 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 5940 * @param addr 5941 * @param pin_data 5942 * @param pin_len 5943 * @return 0 if ok 5944 */ 5945 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 5946 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5947 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 5948 hci_stack->gap_pairing_pin_len = pin_len; 5949 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5950 } 5951 5952 /** 5953 * @brief Legacy Pairing Pin Code Response 5954 * @param addr 5955 * @param pin 5956 * @return 0 if ok 5957 */ 5958 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 5959 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 5960 } 5961 5962 /** 5963 * @brief Abort Legacy Pairing 5964 * @param addr 5965 * @param pin 5966 * @return 0 if ok 5967 */ 5968 int gap_pin_code_negative(bd_addr_t addr){ 5969 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5970 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5971 } 5972 5973 /** 5974 * @brief SSP Passkey Response 5975 * @param addr 5976 * @param passkey 5977 * @return 0 if ok 5978 */ 5979 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 5980 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5981 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5982 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5983 } 5984 5985 /** 5986 * @brief Abort SSP Passkey Entry/Pairing 5987 * @param addr 5988 * @param pin 5989 * @return 0 if ok 5990 */ 5991 int gap_ssp_passkey_negative(const bd_addr_t addr){ 5992 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5993 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5994 } 5995 5996 /** 5997 * @brief Accept SSP Numeric Comparison 5998 * @param addr 5999 * @param passkey 6000 * @return 0 if ok 6001 */ 6002 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6003 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6004 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6005 } 6006 6007 /** 6008 * @brief Abort SSP Numeric Comparison/Pairing 6009 * @param addr 6010 * @param pin 6011 * @return 0 if ok 6012 */ 6013 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6014 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6015 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6016 } 6017 6018 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6019 6020 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6021 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6022 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6023 connectionSetAuthenticationFlags(conn, flag); 6024 hci_run(); 6025 return ERROR_CODE_SUCCESS; 6026 } 6027 6028 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6029 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_REPLY); 6030 } 6031 6032 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6033 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6034 } 6035 #endif 6036 6037 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6038 /** 6039 * @brief Report Remote OOB Data 6040 * @param bd_addr 6041 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6042 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6043 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6044 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6045 */ 6046 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){ 6047 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6048 if (connection == NULL) { 6049 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6050 } 6051 connection->classic_oob_c_192 = c_192; 6052 connection->classic_oob_r_192 = r_192; 6053 connection->classic_oob_c_256 = c_256; 6054 connection->classic_oob_r_256 = r_256; 6055 return ERROR_CODE_SUCCESS; 6056 } 6057 /** 6058 * @brief Generate new OOB data 6059 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6060 */ 6061 void gap_ssp_generate_oob_data(void){ 6062 hci_stack->classic_read_local_oob_data = true; 6063 hci_run(); 6064 } 6065 6066 #endif 6067 6068 /** 6069 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6070 * @param inquiry_mode see bluetooth_defines.h 6071 */ 6072 void hci_set_inquiry_mode(inquiry_mode_t mode){ 6073 hci_stack->inquiry_mode = mode; 6074 } 6075 6076 /** 6077 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6078 */ 6079 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6080 hci_stack->sco_voice_setting = voice_setting; 6081 } 6082 6083 /** 6084 * @brief Get SCO Voice Setting 6085 * @return current voice setting 6086 */ 6087 uint16_t hci_get_sco_voice_setting(void){ 6088 return hci_stack->sco_voice_setting; 6089 } 6090 6091 static int hci_have_usb_transport(void){ 6092 if (!hci_stack->hci_transport) return 0; 6093 const char * transport_name = hci_stack->hci_transport->name; 6094 if (!transport_name) return 0; 6095 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6096 } 6097 6098 /** @brief Get SCO packet length for current SCO Voice setting 6099 * @note Using SCO packets of the exact length is required for USB transfer 6100 * @return Length of SCO packets in bytes (not audio frames) 6101 */ 6102 int hci_get_sco_packet_length(void){ 6103 int sco_packet_length = 0; 6104 6105 #ifdef ENABLE_SCO_OVER_HCI 6106 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6107 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6108 6109 if (hci_have_usb_transport()){ 6110 // see Core Spec for H2 USB Transfer. 6111 // 3 byte SCO header + 24 bytes per connection 6112 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6113 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6114 } else { 6115 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6116 sco_packet_length = 3 + 60 * multiplier; 6117 // assert that it still fits inside an SCO buffer 6118 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6119 sco_packet_length = 3 + 60; 6120 } 6121 } 6122 #endif 6123 6124 #ifdef HAVE_SCO_TRANSPORT 6125 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6126 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6127 sco_packet_length = 3 + 60 * multiplier; 6128 #endif 6129 return sco_packet_length; 6130 } 6131 6132 /** 6133 * @brief Sets the master/slave policy 6134 * @param policy (0: attempt to become master, 1: let connecting device decide) 6135 */ 6136 void hci_set_master_slave_policy(uint8_t policy){ 6137 hci_stack->master_slave_policy = policy; 6138 } 6139 6140 #endif 6141 6142 HCI_STATE hci_get_state(void){ 6143 return hci_stack->state; 6144 } 6145 6146 #ifdef ENABLE_CLASSIC 6147 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6148 hci_stack->gap_classic_accept_callback = accept_callback; 6149 } 6150 #endif 6151 6152 /** 6153 * @brief Set callback for Bluetooth Hardware Error 6154 */ 6155 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6156 hci_stack->hardware_error_callback = fn; 6157 } 6158 6159 void hci_disconnect_all(void){ 6160 btstack_linked_list_iterator_t it; 6161 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6162 while (btstack_linked_list_iterator_has_next(&it)){ 6163 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6164 if (con->state == SENT_DISCONNECT) continue; 6165 con->state = SEND_DISCONNECT; 6166 } 6167 hci_run(); 6168 } 6169 6170 uint16_t hci_get_manufacturer(void){ 6171 return hci_stack->manufacturer; 6172 } 6173 6174 #ifdef ENABLE_BLE 6175 6176 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6177 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6178 if (!hci_con) return NULL; 6179 return &hci_con->sm_connection; 6180 } 6181 6182 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6183 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6184 6185 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6186 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6187 if (hci_connection == NULL) return 0; 6188 if (hci_is_le_connection(hci_connection)){ 6189 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6190 if (sm_conn->sm_connection_encrypted) { 6191 return sm_conn->sm_actual_encryption_key_size; 6192 } 6193 } 6194 #ifdef ENABLE_CLASSIC 6195 else { 6196 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 6197 return hci_connection->encryption_key_size; 6198 } 6199 } 6200 #endif 6201 return 0; 6202 } 6203 6204 int gap_authenticated(hci_con_handle_t con_handle){ 6205 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6206 if (hci_connection == NULL) return 0; 6207 6208 switch (hci_connection->address_type){ 6209 case BD_ADDR_TYPE_LE_PUBLIC: 6210 case BD_ADDR_TYPE_LE_RANDOM: 6211 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6212 return hci_connection->sm_connection.sm_connection_authenticated; 6213 #ifdef ENABLE_CLASSIC 6214 case BD_ADDR_TYPE_SCO: 6215 case BD_ADDR_TYPE_ACL: 6216 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6217 #endif 6218 default: 6219 return 0; 6220 } 6221 } 6222 6223 int gap_secure_connection(hci_con_handle_t con_handle){ 6224 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6225 if (hci_connection == NULL) return 0; 6226 6227 switch (hci_connection->address_type){ 6228 case BD_ADDR_TYPE_LE_PUBLIC: 6229 case BD_ADDR_TYPE_LE_RANDOM: 6230 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6231 return hci_connection->sm_connection.sm_connection_sc; 6232 #ifdef ENABLE_CLASSIC 6233 case BD_ADDR_TYPE_SCO: 6234 case BD_ADDR_TYPE_ACL: 6235 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6236 #endif 6237 default: 6238 return 0; 6239 } 6240 } 6241 6242 bool gap_bonded(hci_con_handle_t con_handle){ 6243 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6244 if (hci_connection == NULL) return 0; 6245 6246 #ifdef ENABLE_CLASSIC 6247 link_key_t link_key; 6248 link_key_type_t link_key_type; 6249 #endif 6250 switch (hci_connection->address_type){ 6251 case BD_ADDR_TYPE_LE_PUBLIC: 6252 case BD_ADDR_TYPE_LE_RANDOM: 6253 return hci_connection->sm_connection.sm_le_db_index >= 0; 6254 #ifdef ENABLE_CLASSIC 6255 case BD_ADDR_TYPE_SCO: 6256 case BD_ADDR_TYPE_ACL: 6257 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6258 #endif 6259 default: 6260 return false; 6261 } 6262 } 6263 6264 6265 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6266 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6267 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6268 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6269 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6270 return sm_conn->sm_connection_authorization_state; 6271 } 6272 #endif 6273 6274 #ifdef ENABLE_CLASSIC 6275 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){ 6276 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6277 if (!conn) return GAP_CONNECTION_INVALID; 6278 conn->sniff_min_interval = sniff_min_interval; 6279 conn->sniff_max_interval = sniff_max_interval; 6280 conn->sniff_attempt = sniff_attempt; 6281 conn->sniff_timeout = sniff_timeout; 6282 hci_run(); 6283 return 0; 6284 } 6285 6286 /** 6287 * @brief Exit Sniff mode 6288 * @param con_handle 6289 @ @return 0 if ok 6290 */ 6291 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6292 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6293 if (!conn) return GAP_CONNECTION_INVALID; 6294 conn->sniff_min_interval = 0xffff; 6295 hci_run(); 6296 return 0; 6297 } 6298 #endif 6299 6300 void hci_halting_defer(void){ 6301 if (hci_stack->state != HCI_STATE_HALTING) return; 6302 switch (hci_stack->substate){ 6303 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6304 case HCI_HALTING_CLOSE: 6305 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6306 break; 6307 default: 6308 break; 6309 } 6310 } 6311 6312 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6313 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6314 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6315 if (le_device_db_index >= le_device_db_max_count()) return; 6316 uint8_t offset = le_device_db_index >> 3; 6317 uint8_t mask = 1 << (le_device_db_index & 7); 6318 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6319 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6320 // note: go back to remove entries, otherwise, a remove + add will skip the add 6321 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6322 } 6323 } 6324 6325 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6326 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6327 if (le_device_db_index >= le_device_db_max_count()) return; 6328 uint8_t offset = le_device_db_index >> 3; 6329 uint8_t mask = 1 << (le_device_db_index & 7); 6330 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6331 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6332 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6333 } 6334 } 6335 6336 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6337 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6338 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6339 } 6340 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6341 // restart le resolving list update 6342 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6343 } 6344 return ERROR_CODE_SUCCESS; 6345 } 6346 #endif 6347 6348 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6349 void hci_setup_test_connections_fuzz(void){ 6350 hci_connection_t * conn; 6351 6352 // default address: 66:55:44:33:00:01 6353 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6354 6355 // setup Controller info 6356 hci_stack->num_cmd_packets = 255; 6357 hci_stack->acl_packets_total_num = 255; 6358 6359 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6360 addr[5] = 0x01; 6361 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6362 conn->con_handle = addr[5]; 6363 conn->role = HCI_ROLE_SLAVE; 6364 conn->state = RECEIVED_CONNECTION_REQUEST; 6365 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6366 6367 // setup incoming Classic SCO connection with con handle 0x0002 6368 addr[5] = 0x02; 6369 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6370 conn->con_handle = addr[5]; 6371 conn->role = HCI_ROLE_SLAVE; 6372 conn->state = RECEIVED_CONNECTION_REQUEST; 6373 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6374 6375 // setup ready Classic ACL connection with con handle 0x0003 6376 addr[5] = 0x03; 6377 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6378 conn->con_handle = addr[5]; 6379 conn->role = HCI_ROLE_SLAVE; 6380 conn->state = OPEN; 6381 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6382 6383 // setup ready Classic SCO connection with con handle 0x0004 6384 addr[5] = 0x04; 6385 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6386 conn->con_handle = addr[5]; 6387 conn->role = HCI_ROLE_SLAVE; 6388 conn->state = OPEN; 6389 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6390 6391 // setup ready LE ACL connection with con handle 0x005 and public address 6392 addr[5] = 0x05; 6393 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6394 conn->con_handle = addr[5]; 6395 conn->role = HCI_ROLE_SLAVE; 6396 conn->state = OPEN; 6397 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6398 conn->sm_connection.sm_connection_encrypted = 1; 6399 } 6400 6401 void hci_free_connections_fuzz(void){ 6402 btstack_linked_list_iterator_t it; 6403 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6404 while (btstack_linked_list_iterator_has_next(&it)){ 6405 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6406 btstack_linked_list_iterator_remove(&it); 6407 btstack_memory_hci_connection_free(con); 6408 } 6409 } 6410 void hci_simulate_working_fuzz(void){ 6411 hci_init_done(); 6412 hci_stack->num_cmd_packets = 255; 6413 } 6414 #endif 6415