1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #include "ble/le_device_db.h" 63 #endif 64 65 #include <stdarg.h> 66 #include <string.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 98 #endif 99 100 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 101 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 102 #endif 103 104 #define HCI_CONNECTION_TIMEOUT_MS 10000 105 106 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 107 #define HCI_RESET_RESEND_TIMEOUT_MS 200 108 #endif 109 110 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 111 #ifndef GAP_INQUIRY_MAX_NAME_LEN 112 #define GAP_INQUIRY_MAX_NAME_LEN 32 113 #endif 114 115 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 116 #define GAP_INQUIRY_DURATION_MIN 0x01 117 #define GAP_INQUIRY_DURATION_MAX 0x30 118 #define GAP_INQUIRY_STATE_IDLE 0x00 119 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 120 #define GAP_INQUIRY_STATE_ACTIVE 0x81 121 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 122 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 123 124 // GAP Remote Name Request 125 #define GAP_REMOTE_NAME_STATE_IDLE 0 126 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 127 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 128 129 // GAP Pairing 130 #define GAP_PAIRING_STATE_IDLE 0 131 #define GAP_PAIRING_STATE_SEND_PIN 1 132 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 133 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 134 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 135 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 136 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 137 138 139 // prototypes 140 #ifdef ENABLE_CLASSIC 141 static void hci_update_scan_enable(void); 142 static void hci_emit_discoverable_enabled(uint8_t enabled); 143 static int hci_local_ssp_activated(void); 144 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 145 static bool hci_ssp_supported(hci_connection_t * connection); 146 static void hci_notify_if_sco_can_send_now(void); 147 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 148 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 149 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 150 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 151 static void hci_connection_timestamp(hci_connection_t *connection); 152 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 153 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 154 #endif 155 156 static int hci_power_control_on(void); 157 static void hci_power_control_off(void); 158 static void hci_state_reset(void); 159 static void hci_emit_transport_packet_sent(void); 160 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 161 static void hci_emit_nr_connections_changed(void); 162 static void hci_emit_hci_open_failed(void); 163 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 164 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 165 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 166 static void hci_run(void); 167 static int hci_is_le_connection(hci_connection_t * connection); 168 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 169 170 #ifdef ENABLE_CLASSIC 171 static int hci_have_usb_transport(void); 172 #endif 173 174 #ifdef ENABLE_BLE 175 #ifdef ENABLE_LE_CENTRAL 176 // called from test/ble_client/advertising_data_parser.c 177 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 178 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 179 static hci_connection_t * gap_get_outgoing_connection(void); 180 #endif 181 #endif 182 183 // the STACK is here 184 #ifndef HAVE_MALLOC 185 static hci_stack_t hci_stack_static; 186 #endif 187 static hci_stack_t * hci_stack = NULL; 188 189 #ifdef ENABLE_CLASSIC 190 // default name 191 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 192 193 // test helper 194 static uint8_t disable_l2cap_timeouts = 0; 195 #endif 196 197 /** 198 * create connection for given address 199 * 200 * @return connection OR NULL, if no memory left 201 */ 202 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 203 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 204 hci_connection_t * conn = btstack_memory_hci_connection_get(); 205 if (!conn) return NULL; 206 bd_addr_copy(conn->address, addr); 207 conn->role = HCI_ROLE_INVALID; 208 conn->address_type = addr_type; 209 conn->con_handle = 0xffff; 210 conn->authentication_flags = AUTH_FLAGS_NONE; 211 conn->bonding_flags = 0; 212 conn->requested_security_level = LEVEL_0; 213 #ifdef ENABLE_CLASSIC 214 conn->request_role = HCI_ROLE_INVALID; 215 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 216 btstack_run_loop_set_timer_context(&conn->timeout, conn); 217 hci_connection_timestamp(conn); 218 #endif 219 conn->acl_recombination_length = 0; 220 conn->acl_recombination_pos = 0; 221 conn->num_packets_sent = 0; 222 223 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 224 #ifdef ENABLE_BLE 225 conn->le_phy_update_all_phys = 0xff; 226 #endif 227 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 228 conn->le_max_tx_octets = 27; 229 #endif 230 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 231 return conn; 232 } 233 234 235 /** 236 * get le connection parameter range 237 * 238 * @return le connection parameter range struct 239 */ 240 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 241 *range = hci_stack->le_connection_parameter_range; 242 } 243 244 /** 245 * set le connection parameter range 246 * 247 */ 248 249 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 250 hci_stack->le_connection_parameter_range = *range; 251 } 252 253 /** 254 * @brief Test if connection parameters are inside in existing rage 255 * @param conn_interval_min (unit: 1.25ms) 256 * @param conn_interval_max (unit: 1.25ms) 257 * @param conn_latency 258 * @param supervision_timeout (unit: 10ms) 259 * @returns 1 if included 260 */ 261 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){ 262 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 263 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 264 265 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 266 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 267 268 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 269 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 270 271 return 1; 272 } 273 274 /** 275 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 276 * @note: default: 1 277 * @param max_peripheral_connections 278 */ 279 #ifdef ENABLE_LE_PERIPHERAL 280 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 281 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 282 } 283 #endif 284 285 /** 286 * get hci connections iterator 287 * 288 * @return hci connections iterator 289 */ 290 291 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 292 btstack_linked_list_iterator_init(it, &hci_stack->connections); 293 } 294 295 /** 296 * get connection for a given handle 297 * 298 * @return connection OR NULL, if not found 299 */ 300 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 301 btstack_linked_list_iterator_t it; 302 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 303 while (btstack_linked_list_iterator_has_next(&it)){ 304 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 305 if ( item->con_handle == con_handle ) { 306 return item; 307 } 308 } 309 return NULL; 310 } 311 312 /** 313 * get connection for given address 314 * 315 * @return connection OR NULL, if not found 316 */ 317 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 318 btstack_linked_list_iterator_t it; 319 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 320 while (btstack_linked_list_iterator_has_next(&it)){ 321 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 322 if (connection->address_type != addr_type) continue; 323 if (memcmp(addr, connection->address, 6) != 0) continue; 324 return connection; 325 } 326 return NULL; 327 } 328 329 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 330 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 331 } 332 333 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 334 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 335 } 336 337 #ifdef ENABLE_CLASSIC 338 339 #ifdef ENABLE_SCO_OVER_HCI 340 static int hci_number_sco_connections(void){ 341 int connections = 0; 342 btstack_linked_list_iterator_t it; 343 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 344 while (btstack_linked_list_iterator_has_next(&it)){ 345 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 346 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 347 connections++; 348 } 349 return connections; 350 } 351 #endif 352 353 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 354 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 355 #ifdef HAVE_EMBEDDED_TICK 356 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 357 // connections might be timed out 358 hci_emit_l2cap_check_timeout(connection); 359 } 360 #else 361 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 362 // connections might be timed out 363 hci_emit_l2cap_check_timeout(connection); 364 } 365 #endif 366 } 367 368 static void hci_connection_timestamp(hci_connection_t *connection){ 369 #ifdef HAVE_EMBEDDED_TICK 370 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 371 #else 372 connection->timestamp = btstack_run_loop_get_time_ms(); 373 #endif 374 } 375 376 /** 377 * add authentication flags and reset timer 378 * @note: assumes classic connection 379 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 380 */ 381 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 382 bd_addr_t addr; 383 reverse_bd_addr(bd_addr, addr); 384 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 385 if (conn) { 386 connectionSetAuthenticationFlags(conn, flags); 387 hci_connection_timestamp(conn); 388 } 389 } 390 391 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 392 hci_connection_t * conn = hci_connection_for_handle(handle); 393 if (!conn) return 0; 394 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 395 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 396 return 0; 397 } 398 399 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 400 if (!hci_stack->link_key_db) return; 401 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 402 hci_stack->link_key_db->delete_link_key(addr); 403 } 404 405 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 406 if (!hci_stack->link_key_db) return; 407 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 408 hci_stack->link_key_db->put_link_key(addr, link_key, type); 409 } 410 411 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 412 if (!hci_stack->link_key_db) return false; 413 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 414 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 415 return result; 416 } 417 418 void gap_delete_all_link_keys(void){ 419 bd_addr_t addr; 420 link_key_t link_key; 421 link_key_type_t type; 422 btstack_link_key_iterator_t it; 423 int ok = gap_link_key_iterator_init(&it); 424 if (!ok) { 425 log_error("could not initialize iterator"); 426 return; 427 } 428 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 429 gap_drop_link_key_for_bd_addr(addr); 430 } 431 gap_link_key_iterator_done(&it); 432 } 433 434 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 435 if (!hci_stack->link_key_db) return 0; 436 if (!hci_stack->link_key_db->iterator_init) return 0; 437 return hci_stack->link_key_db->iterator_init(it); 438 } 439 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){ 440 if (!hci_stack->link_key_db) return 0; 441 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 442 } 443 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 444 if (!hci_stack->link_key_db) return; 445 hci_stack->link_key_db->iterator_done(it); 446 } 447 #endif 448 449 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 450 switch (address_type){ 451 case BD_ADDR_TYPE_LE_PUBLIC: 452 case BD_ADDR_TYPE_LE_RANDOM: 453 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 454 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 455 return true; 456 default: 457 return false; 458 } 459 } 460 461 static int hci_is_le_connection(hci_connection_t * connection){ 462 return hci_is_le_connection_type(connection->address_type); 463 } 464 465 /** 466 * count connections 467 */ 468 static int nr_hci_connections(void){ 469 int count = 0; 470 btstack_linked_item_t *it; 471 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 472 count++; 473 } 474 return count; 475 } 476 477 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 478 479 unsigned int num_packets_sent_classic = 0; 480 unsigned int num_packets_sent_le = 0; 481 482 btstack_linked_item_t *it; 483 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 484 hci_connection_t * connection = (hci_connection_t *) it; 485 if (hci_is_le_connection(connection)){ 486 num_packets_sent_le += connection->num_packets_sent; 487 } 488 if (connection->address_type == BD_ADDR_TYPE_ACL){ 489 num_packets_sent_classic += connection->num_packets_sent; 490 } 491 } 492 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 493 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 494 int free_slots_le = 0; 495 496 if (free_slots_classic < 0){ 497 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); 498 return 0; 499 } 500 501 if (hci_stack->le_acl_packets_total_num){ 502 // if we have LE slots, they are used 503 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 504 if (free_slots_le < 0){ 505 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); 506 return 0; 507 } 508 } else { 509 // otherwise, classic slots are used for LE, too 510 free_slots_classic -= num_packets_sent_le; 511 if (free_slots_classic < 0){ 512 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); 513 return 0; 514 } 515 } 516 517 switch (address_type){ 518 case BD_ADDR_TYPE_UNKNOWN: 519 log_error("hci_number_free_acl_slots: unknown address type"); 520 return 0; 521 522 case BD_ADDR_TYPE_ACL: 523 return free_slots_classic; 524 525 default: 526 if (hci_stack->le_acl_packets_total_num){ 527 return free_slots_le; 528 } 529 return free_slots_classic; 530 } 531 } 532 533 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 534 // get connection type 535 hci_connection_t * connection = hci_connection_for_handle(con_handle); 536 if (!connection){ 537 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 538 return 0; 539 } 540 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 541 } 542 543 #ifdef ENABLE_CLASSIC 544 static int hci_number_free_sco_slots(void){ 545 unsigned int num_sco_packets_sent = 0; 546 btstack_linked_item_t *it; 547 if (hci_stack->synchronous_flow_control_enabled){ 548 // explicit flow control 549 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 550 hci_connection_t * connection = (hci_connection_t *) it; 551 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 552 num_sco_packets_sent += connection->num_packets_sent; 553 } 554 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 555 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 556 return 0; 557 } 558 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 559 } else { 560 // implicit flow control -- TODO 561 int num_ready = 0; 562 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 563 hci_connection_t * connection = (hci_connection_t *) it; 564 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 565 if (connection->sco_tx_ready == 0) continue; 566 num_ready++; 567 } 568 return num_ready; 569 } 570 } 571 #endif 572 573 // only used to send HCI Host Number Completed Packets 574 static int hci_can_send_comand_packet_transport(void){ 575 if (hci_stack->hci_packet_buffer_reserved) return 0; 576 577 // check for async hci transport implementations 578 if (hci_stack->hci_transport->can_send_packet_now){ 579 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 580 return 0; 581 } 582 } 583 return 1; 584 } 585 586 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 587 int hci_can_send_command_packet_now(void){ 588 if (hci_can_send_comand_packet_transport() == 0) return 0; 589 return hci_stack->num_cmd_packets > 0u; 590 } 591 592 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 593 // check for async hci transport implementations 594 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 595 return hci_stack->hci_transport->can_send_packet_now(packet_type); 596 } 597 598 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 599 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 600 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 601 } 602 603 int hci_can_send_acl_le_packet_now(void){ 604 if (hci_stack->hci_packet_buffer_reserved) return 0; 605 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 606 } 607 608 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 609 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 610 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 611 } 612 613 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 614 if (hci_stack->hci_packet_buffer_reserved) return 0; 615 return hci_can_send_prepared_acl_packet_now(con_handle); 616 } 617 618 #ifdef ENABLE_CLASSIC 619 int hci_can_send_acl_classic_packet_now(void){ 620 if (hci_stack->hci_packet_buffer_reserved) return 0; 621 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 622 } 623 624 int hci_can_send_prepared_sco_packet_now(void){ 625 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 626 if (hci_have_usb_transport()){ 627 return hci_stack->sco_can_send_now; 628 } else { 629 return hci_number_free_sco_slots() > 0; 630 } 631 } 632 633 int hci_can_send_sco_packet_now(void){ 634 if (hci_stack->hci_packet_buffer_reserved) return 0; 635 return hci_can_send_prepared_sco_packet_now(); 636 } 637 638 void hci_request_sco_can_send_now_event(void){ 639 hci_stack->sco_waiting_for_can_send_now = 1; 640 hci_notify_if_sco_can_send_now(); 641 } 642 #endif 643 644 // used for internal checks in l2cap.c 645 int hci_is_packet_buffer_reserved(void){ 646 return hci_stack->hci_packet_buffer_reserved; 647 } 648 649 // reserves outgoing packet buffer. @returns 1 if successful 650 int hci_reserve_packet_buffer(void){ 651 if (hci_stack->hci_packet_buffer_reserved) { 652 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 653 return 0; 654 } 655 hci_stack->hci_packet_buffer_reserved = 1; 656 return 1; 657 } 658 659 void hci_release_packet_buffer(void){ 660 hci_stack->hci_packet_buffer_reserved = 0; 661 } 662 663 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 664 static int hci_transport_synchronous(void){ 665 return hci_stack->hci_transport->can_send_packet_now == NULL; 666 } 667 668 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 669 670 // 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); 671 672 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 673 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 674 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 675 max_acl_data_packet_length = hci_stack->le_data_packets_length; 676 } 677 678 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 679 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 680 max_acl_data_packet_length = connection->le_max_tx_octets; 681 } 682 #endif 683 684 log_debug("hci_send_acl_packet_fragments entered"); 685 686 int err; 687 // multiple packets could be send on a synchronous HCI transport 688 while (true){ 689 690 log_debug("hci_send_acl_packet_fragments loop entered"); 691 692 // get current data 693 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 694 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 695 bool more_fragments = false; 696 697 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 698 if (current_acl_data_packet_length > max_acl_data_packet_length){ 699 more_fragments = true; 700 current_acl_data_packet_length = max_acl_data_packet_length; 701 } 702 703 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 704 if (acl_header_pos > 0u){ 705 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 706 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 707 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 708 } 709 710 // update header len 711 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 712 713 // count packet 714 connection->num_packets_sent++; 715 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 716 717 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 718 if (more_fragments){ 719 // update start of next fragment to send 720 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 721 } else { 722 // done 723 hci_stack->acl_fragmentation_pos = 0; 724 hci_stack->acl_fragmentation_total_size = 0; 725 } 726 727 // send packet 728 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 729 const int size = current_acl_data_packet_length + 4; 730 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 731 hci_stack->acl_fragmentation_tx_active = 1; 732 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 733 734 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 735 736 // done yet? 737 if (!more_fragments) break; 738 739 // can send more? 740 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 741 } 742 743 log_debug("hci_send_acl_packet_fragments loop over"); 744 745 // release buffer now for synchronous transport 746 if (hci_transport_synchronous()){ 747 hci_stack->acl_fragmentation_tx_active = 0; 748 hci_release_packet_buffer(); 749 hci_emit_transport_packet_sent(); 750 } 751 752 return err; 753 } 754 755 // pre: caller has reserved the packet buffer 756 int hci_send_acl_packet_buffer(int size){ 757 758 // log_info("hci_send_acl_packet_buffer size %u", size); 759 760 if (!hci_stack->hci_packet_buffer_reserved) { 761 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 762 return 0; 763 } 764 765 uint8_t * packet = hci_stack->hci_packet_buffer; 766 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 767 768 // check for free places on Bluetooth module 769 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 770 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 771 hci_release_packet_buffer(); 772 hci_emit_transport_packet_sent(); 773 return BTSTACK_ACL_BUFFERS_FULL; 774 } 775 776 hci_connection_t *connection = hci_connection_for_handle( con_handle); 777 if (!connection) { 778 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 779 hci_release_packet_buffer(); 780 hci_emit_transport_packet_sent(); 781 return 0; 782 } 783 784 #ifdef ENABLE_CLASSIC 785 hci_connection_timestamp(connection); 786 #endif 787 788 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 789 790 // setup data 791 hci_stack->acl_fragmentation_total_size = size; 792 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 793 794 return hci_send_acl_packet_fragments(connection); 795 } 796 797 #ifdef ENABLE_CLASSIC 798 // pre: caller has reserved the packet buffer 799 int hci_send_sco_packet_buffer(int size){ 800 801 // log_info("hci_send_acl_packet_buffer size %u", size); 802 803 if (!hci_stack->hci_packet_buffer_reserved) { 804 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 805 return 0; 806 } 807 808 uint8_t * packet = hci_stack->hci_packet_buffer; 809 810 // skip checks in loopback mode 811 if (!hci_stack->loopback_mode){ 812 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 813 814 // check for free places on Bluetooth module 815 if (!hci_can_send_prepared_sco_packet_now()) { 816 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 817 hci_release_packet_buffer(); 818 hci_emit_transport_packet_sent(); 819 return BTSTACK_ACL_BUFFERS_FULL; 820 } 821 822 // track send packet in connection struct 823 hci_connection_t *connection = hci_connection_for_handle( con_handle); 824 if (!connection) { 825 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 826 hci_release_packet_buffer(); 827 hci_emit_transport_packet_sent(); 828 return 0; 829 } 830 831 if (hci_have_usb_transport()){ 832 // token used 833 hci_stack->sco_can_send_now = 0; 834 } else { 835 if (hci_stack->synchronous_flow_control_enabled){ 836 connection->num_packets_sent++; 837 } else { 838 connection->sco_tx_ready--; 839 } 840 } 841 } 842 843 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 844 845 #ifdef HAVE_SCO_TRANSPORT 846 hci_stack->sco_transport->send_packet(packet, size); 847 hci_release_packet_buffer(); 848 hci_emit_transport_packet_sent(); 849 850 return 0; 851 #else 852 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 853 if (hci_transport_synchronous()){ 854 hci_release_packet_buffer(); 855 hci_emit_transport_packet_sent(); 856 } 857 858 return err; 859 #endif 860 } 861 #endif 862 863 static void acl_handler(uint8_t *packet, uint16_t size){ 864 865 // get info 866 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 867 hci_connection_t *conn = hci_connection_for_handle(con_handle); 868 uint8_t acl_flags = READ_ACL_FLAGS(packet); 869 uint16_t acl_length = READ_ACL_LENGTH(packet); 870 871 // ignore non-registered handle 872 if (!conn){ 873 log_error("acl_handler called with non-registered handle %u!" , con_handle); 874 return; 875 } 876 877 // assert packet is complete 878 if ((acl_length + 4u) != size){ 879 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 880 return; 881 } 882 883 #ifdef ENABLE_CLASSIC 884 // update idle timestamp 885 hci_connection_timestamp(conn); 886 #endif 887 888 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 889 hci_stack->host_completed_packets = 1; 890 conn->num_packets_completed++; 891 #endif 892 893 // handle different packet types 894 switch (acl_flags & 0x03u) { 895 896 case 0x01: // continuation fragment 897 898 // sanity checks 899 if (conn->acl_recombination_pos == 0u) { 900 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 901 return; 902 } 903 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 904 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 905 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 906 conn->acl_recombination_pos = 0; 907 return; 908 } 909 910 // append fragment payload (header already stored) 911 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 912 &packet[4], acl_length); 913 conn->acl_recombination_pos += acl_length; 914 915 // forward complete L2CAP packet if complete. 916 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 917 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 918 // reset recombination buffer 919 conn->acl_recombination_length = 0; 920 conn->acl_recombination_pos = 0; 921 } 922 break; 923 924 case 0x02: { // first fragment 925 926 // sanity check 927 if (conn->acl_recombination_pos) { 928 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 929 conn->acl_recombination_pos = 0; 930 } 931 932 // peek into L2CAP packet! 933 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 934 935 // compare fragment size to L2CAP packet size 936 if (acl_length >= (l2cap_length + 4u)){ 937 // forward fragment as L2CAP packet 938 hci_emit_acl_packet(packet, acl_length + 4u); 939 } else { 940 941 if (acl_length > HCI_ACL_BUFFER_SIZE){ 942 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 943 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 944 return; 945 } 946 947 // store first fragment and tweak acl length for complete package 948 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 949 packet, acl_length + 4u); 950 conn->acl_recombination_pos = acl_length + 4u; 951 conn->acl_recombination_length = l2cap_length; 952 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 953 } 954 break; 955 956 } 957 default: 958 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 959 return; 960 } 961 962 // execute main loop 963 hci_run(); 964 } 965 966 static void hci_shutdown_connection(hci_connection_t *conn){ 967 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 968 969 #ifdef ENABLE_CLASSIC 970 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 971 bd_addr_type_t addr_type = conn->address_type; 972 #endif 973 #ifdef HAVE_SCO_TRANSPORT 974 hci_con_handle_t con_handle = conn->con_handle; 975 #endif 976 #endif 977 978 btstack_run_loop_remove_timer(&conn->timeout); 979 980 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 981 btstack_memory_hci_connection_free( conn ); 982 983 // now it's gone 984 hci_emit_nr_connections_changed(); 985 986 #ifdef ENABLE_CLASSIC 987 #ifdef ENABLE_SCO_OVER_HCI 988 // update SCO 989 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 990 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 991 } 992 #endif 993 #ifdef HAVE_SCO_TRANSPORT 994 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 995 hci_stack->sco_transport->close(con_handle); 996 } 997 #endif 998 #endif 999 } 1000 1001 #ifdef ENABLE_CLASSIC 1002 1003 static const uint16_t packet_type_sizes[] = { 1004 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1005 HCI_ACL_DH1_SIZE, 0, 0, 0, 1006 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1007 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1008 }; 1009 static const uint8_t packet_type_feature_requirement_bit[] = { 1010 0, // 3 slot packets 1011 1, // 5 slot packets 1012 25, // EDR 2 mpbs 1013 26, // EDR 3 mbps 1014 39, // 3 slot EDR packts 1015 40, // 5 slot EDR packet 1016 }; 1017 static const uint16_t packet_type_feature_packet_mask[] = { 1018 0x0f00, // 3 slot packets 1019 0xf000, // 5 slot packets 1020 0x1102, // EDR 2 mpbs 1021 0x2204, // EDR 3 mbps 1022 0x0300, // 3 slot EDR packts 1023 0x3000, // 5 slot EDR packet 1024 }; 1025 1026 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1027 // enable packet types based on size 1028 uint16_t packet_types = 0; 1029 unsigned int i; 1030 for (i=0;i<16;i++){ 1031 if (packet_type_sizes[i] == 0) continue; 1032 if (packet_type_sizes[i] <= buffer_size){ 1033 packet_types |= 1 << i; 1034 } 1035 } 1036 // disable packet types due to missing local supported features 1037 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1038 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1039 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1040 if (feature_set) continue; 1041 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1042 packet_types &= ~packet_type_feature_packet_mask[i]; 1043 } 1044 // flip bits for "may not be used" 1045 packet_types ^= 0x3306; 1046 return packet_types; 1047 } 1048 1049 uint16_t hci_usable_acl_packet_types(void){ 1050 return hci_stack->packet_types; 1051 } 1052 #endif 1053 1054 uint8_t* hci_get_outgoing_packet_buffer(void){ 1055 // hci packet buffer is >= acl data packet length 1056 return hci_stack->hci_packet_buffer; 1057 } 1058 1059 uint16_t hci_max_acl_data_packet_length(void){ 1060 return hci_stack->acl_data_packet_length; 1061 } 1062 1063 #ifdef ENABLE_CLASSIC 1064 int hci_extended_sco_link_supported(void){ 1065 // No. 31, byte 3, bit 7 1066 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1067 } 1068 #endif 1069 1070 int hci_non_flushable_packet_boundary_flag_supported(void){ 1071 // No. 54, byte 6, bit 6 1072 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1073 } 1074 1075 static int gap_ssp_supported(void){ 1076 // No. 51, byte 6, bit 3 1077 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1078 } 1079 1080 static int hci_classic_supported(void){ 1081 #ifdef ENABLE_CLASSIC 1082 // No. 37, byte 4, bit 5, = No BR/EDR Support 1083 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1084 #else 1085 return 0; 1086 #endif 1087 } 1088 1089 static int hci_le_supported(void){ 1090 #ifdef ENABLE_BLE 1091 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1092 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1093 #else 1094 return 0; 1095 #endif 1096 } 1097 1098 #ifdef ENABLE_BLE 1099 1100 /** 1101 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1102 */ 1103 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1104 *addr_type = hci_stack->le_own_addr_type; 1105 if (hci_stack->le_own_addr_type){ 1106 (void)memcpy(addr, hci_stack->le_random_address, 6); 1107 } else { 1108 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1109 } 1110 } 1111 1112 #ifdef ENABLE_LE_CENTRAL 1113 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1114 1115 int offset = 3; 1116 int num_reports = packet[offset]; 1117 offset += 1; 1118 1119 int i; 1120 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1121 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1122 for (i=0; (i<num_reports) && (offset < size);i++){ 1123 // sanity checks on data_length: 1124 uint8_t data_length = packet[offset + 8]; 1125 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1126 if ((offset + 9u + data_length + 1u) > size) return; 1127 // setup event 1128 uint8_t event_size = 10u + data_length; 1129 int pos = 0; 1130 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1131 event[pos++] = event_size; 1132 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1133 offset += 8; 1134 pos += 8; 1135 event[pos++] = packet[offset + 1 + data_length]; // rssi 1136 event[pos++] = data_length; 1137 offset++; 1138 (void)memcpy(&event[pos], &packet[offset], data_length); 1139 pos += data_length; 1140 offset += data_length + 1u; // rssi 1141 hci_emit_event(event, pos, 1); 1142 } 1143 } 1144 #endif 1145 #endif 1146 1147 #ifdef ENABLE_BLE 1148 #ifdef ENABLE_LE_PERIPHERAL 1149 static void hci_update_advertisements_enabled_for_current_roles(void){ 1150 if (hci_stack->le_advertisements_enabled){ 1151 // get number of active le slave connections 1152 int num_slave_connections = 0; 1153 btstack_linked_list_iterator_t it; 1154 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1155 while (btstack_linked_list_iterator_has_next(&it)){ 1156 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1157 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1158 if (con->state != OPEN) continue; 1159 if (con->role != HCI_ROLE_SLAVE) continue; 1160 if (!hci_is_le_connection(con)) continue; 1161 num_slave_connections++; 1162 } 1163 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1164 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1165 } else { 1166 hci_stack->le_advertisements_enabled_for_current_roles = false; 1167 } 1168 } 1169 #endif 1170 #endif 1171 1172 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1173 1174 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1175 if (!hci_stack->config) return 0; 1176 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1177 // Limit baud rate for Broadcom chipsets to 3 mbps 1178 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1179 baud_rate = 3000000; 1180 } 1181 return baud_rate; 1182 } 1183 1184 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1185 UNUSED(ds); 1186 1187 switch (hci_stack->substate){ 1188 case HCI_INIT_W4_SEND_RESET: 1189 log_info("Resend HCI Reset"); 1190 hci_stack->substate = HCI_INIT_SEND_RESET; 1191 hci_stack->num_cmd_packets = 1; 1192 hci_run(); 1193 break; 1194 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1195 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1196 if (hci_stack->hci_transport->reset_link){ 1197 hci_stack->hci_transport->reset_link(); 1198 } 1199 1200 /* fall through */ 1201 1202 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1203 log_info("Resend HCI Reset - CSR Warm Boot"); 1204 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1205 hci_stack->num_cmd_packets = 1; 1206 hci_run(); 1207 break; 1208 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1209 if (hci_stack->hci_transport->set_baudrate){ 1210 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1211 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1212 hci_stack->hci_transport->set_baudrate(baud_rate); 1213 } 1214 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1215 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1216 if (hci_stack->hci_transport->reset_link){ 1217 log_info("Link Reset"); 1218 hci_stack->hci_transport->reset_link(); 1219 } 1220 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1221 hci_run(); 1222 } 1223 break; 1224 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1225 // otherwise continue 1226 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1227 hci_send_cmd(&hci_read_local_supported_commands); 1228 break; 1229 default: 1230 break; 1231 } 1232 } 1233 #endif 1234 1235 static void hci_initializing_next_state(void){ 1236 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1237 } 1238 1239 // assumption: hci_can_send_command_packet_now() == true 1240 static void hci_initializing_run(void){ 1241 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1242 switch (hci_stack->substate){ 1243 case HCI_INIT_SEND_RESET: 1244 hci_state_reset(); 1245 1246 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1247 // prepare reset if command complete not received in 100ms 1248 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1249 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1250 btstack_run_loop_add_timer(&hci_stack->timeout); 1251 #endif 1252 // send command 1253 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1254 hci_send_cmd(&hci_reset); 1255 break; 1256 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1257 hci_send_cmd(&hci_read_local_version_information); 1258 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1259 break; 1260 case HCI_INIT_SEND_READ_LOCAL_NAME: 1261 hci_send_cmd(&hci_read_local_name); 1262 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1263 break; 1264 1265 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1266 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1267 hci_state_reset(); 1268 // prepare reset if command complete not received in 100ms 1269 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1270 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1271 btstack_run_loop_add_timer(&hci_stack->timeout); 1272 // send command 1273 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1274 hci_send_cmd(&hci_reset); 1275 break; 1276 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1277 hci_state_reset(); 1278 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1279 hci_send_cmd(&hci_reset); 1280 break; 1281 case HCI_INIT_SEND_BAUD_CHANGE: { 1282 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1283 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1284 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1285 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1286 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1287 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1288 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1289 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1290 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1291 btstack_run_loop_add_timer(&hci_stack->timeout); 1292 } 1293 break; 1294 } 1295 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1296 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1297 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1298 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1299 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1300 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1301 break; 1302 } 1303 case HCI_INIT_CUSTOM_INIT: 1304 // Custom initialization 1305 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1306 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1307 bool send_cmd = false; 1308 switch (hci_stack->chipset_result){ 1309 case BTSTACK_CHIPSET_VALID_COMMAND: 1310 send_cmd = true; 1311 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1312 break; 1313 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1314 send_cmd = true; 1315 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1316 log_info("CSR Warm Boot"); 1317 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1318 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1319 btstack_run_loop_add_timer(&hci_stack->timeout); 1320 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1321 && hci_stack->config 1322 && hci_stack->chipset 1323 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1324 && hci_stack->hci_transport->set_baudrate 1325 && hci_transport_uart_get_main_baud_rate()){ 1326 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1327 } else { 1328 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1329 } 1330 break; 1331 default: 1332 break; 1333 } 1334 1335 if (send_cmd){ 1336 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1337 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1338 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1339 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1340 break; 1341 } 1342 log_info("Init script done"); 1343 1344 // Init script download on Broadcom chipsets causes: 1345 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1346 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1347 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1348 1349 // - baud rate to reset, restore UART baud rate if needed 1350 int need_baud_change = hci_stack->config 1351 && hci_stack->chipset 1352 && hci_stack->chipset->set_baudrate_command 1353 && hci_stack->hci_transport->set_baudrate 1354 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1355 if (need_baud_change) { 1356 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1357 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1358 hci_stack->hci_transport->set_baudrate(baud_rate); 1359 } 1360 1361 uint16_t bcm_delay_ms = 300; 1362 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1363 // -> Work around: wait here. 1364 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1365 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1366 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1367 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1368 btstack_run_loop_add_timer(&hci_stack->timeout); 1369 break; 1370 } 1371 } 1372 // otherwise continue 1373 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1374 hci_send_cmd(&hci_read_local_supported_commands); 1375 break; 1376 case HCI_INIT_SET_BD_ADDR: 1377 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1378 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1379 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1380 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1381 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1382 break; 1383 #endif 1384 1385 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1386 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1387 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1388 hci_send_cmd(&hci_read_local_supported_commands); 1389 break; 1390 case HCI_INIT_READ_BD_ADDR: 1391 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1392 hci_send_cmd(&hci_read_bd_addr); 1393 break; 1394 case HCI_INIT_READ_BUFFER_SIZE: 1395 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1396 hci_send_cmd(&hci_read_buffer_size); 1397 break; 1398 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1399 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1400 hci_send_cmd(&hci_read_local_supported_features); 1401 break; 1402 1403 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1404 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1405 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1406 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1407 break; 1408 case HCI_INIT_HOST_BUFFER_SIZE: 1409 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1410 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1411 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1412 break; 1413 #endif 1414 1415 case HCI_INIT_SET_EVENT_MASK: 1416 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1417 if (hci_le_supported()){ 1418 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1419 } else { 1420 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1421 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1422 } 1423 break; 1424 1425 #ifdef ENABLE_CLASSIC 1426 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1427 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1428 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1429 break; 1430 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1431 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1432 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1433 break; 1434 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1435 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1436 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1437 break; 1438 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1439 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1440 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1441 break; 1442 case HCI_INIT_WRITE_LOCAL_NAME: { 1443 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1444 hci_reserve_packet_buffer(); 1445 uint8_t * packet = hci_stack->hci_packet_buffer; 1446 // construct HCI Command and send 1447 uint16_t opcode = hci_write_local_name.opcode; 1448 hci_stack->last_cmd_opcode = opcode; 1449 packet[0] = opcode & 0xff; 1450 packet[1] = opcode >> 8; 1451 packet[2] = DEVICE_NAME_LEN; 1452 memset(&packet[3], 0, DEVICE_NAME_LEN); 1453 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1454 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1455 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1456 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1457 // expand '00:00:00:00:00:00' in name with bd_addr 1458 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1459 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1460 break; 1461 } 1462 case HCI_INIT_WRITE_EIR_DATA: { 1463 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1464 hci_reserve_packet_buffer(); 1465 uint8_t * packet = hci_stack->hci_packet_buffer; 1466 // construct HCI Command in-place and send 1467 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1468 hci_stack->last_cmd_opcode = opcode; 1469 uint16_t offset = 0; 1470 packet[offset++] = opcode & 0xff; 1471 packet[offset++] = opcode >> 8; 1472 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1473 packet[offset++] = 0; // FEC not required 1474 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1475 if (hci_stack->eir_data){ 1476 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1477 ad_context_t context; 1478 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1479 uint8_t data_type = ad_iterator_get_data_type(&context); 1480 uint8_t size = ad_iterator_get_data_len(&context); 1481 const uint8_t *data = ad_iterator_get_data(&context); 1482 // copy item 1483 packet[offset++] = size + 1; 1484 packet[offset++] = data_type; 1485 memcpy(&packet[offset], data, size); 1486 // update name item 1487 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1488 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1489 } 1490 offset += size; 1491 } 1492 } else { 1493 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1494 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1495 packet[offset++] = bytes_to_copy + 1; 1496 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1497 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1498 // expand '00:00:00:00:00:00' in name with bd_addr 1499 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1500 } 1501 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1502 break; 1503 } 1504 case HCI_INIT_WRITE_INQUIRY_MODE: 1505 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1506 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1507 break; 1508 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1509 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1510 hci_stack->secure_connections_active = true; 1511 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1512 break; 1513 case HCI_INIT_WRITE_SCAN_ENABLE: 1514 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1515 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1516 break; 1517 // only sent if ENABLE_SCO_OVER_HCI is defined 1518 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1519 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1520 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1521 break; 1522 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1523 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1524 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1525 break; 1526 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1527 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1528 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1529 #ifdef ENABLE_SCO_OVER_HCI 1530 log_info("BCM: Route SCO data via HCI transport"); 1531 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1532 #endif 1533 #ifdef ENABLE_SCO_OVER_PCM 1534 log_info("BCM: Route SCO data via PCM interface"); 1535 #ifdef ENABLE_BCM_PCM_WBS 1536 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1537 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1538 #else 1539 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1540 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1541 #endif 1542 #endif 1543 break; 1544 #ifdef ENABLE_SCO_OVER_PCM 1545 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1546 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1547 log_info("BCM: Config PCM interface for I2S"); 1548 #ifdef ENABLE_BCM_PCM_WBS 1549 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1550 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1551 #else 1552 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1553 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1554 #endif 1555 break; 1556 #endif 1557 #endif 1558 1559 #ifdef ENABLE_BLE 1560 // LE INIT 1561 case HCI_INIT_LE_READ_BUFFER_SIZE: 1562 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1563 hci_send_cmd(&hci_le_read_buffer_size); 1564 break; 1565 case HCI_INIT_LE_SET_EVENT_MASK: 1566 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1567 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1568 break; 1569 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1570 // LE Supported Host = 1, Simultaneous Host = 0 1571 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1572 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1573 break; 1574 #endif 1575 1576 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1577 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1578 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1579 hci_send_cmd(&hci_le_read_maximum_data_length); 1580 break; 1581 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1582 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1583 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1584 break; 1585 #endif 1586 1587 #ifdef ENABLE_LE_CENTRAL 1588 case HCI_INIT_READ_WHITE_LIST_SIZE: 1589 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1590 hci_send_cmd(&hci_le_read_white_list_size); 1591 break; 1592 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1593 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1594 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); 1595 break; 1596 #endif 1597 default: 1598 return; 1599 } 1600 } 1601 1602 static void hci_init_done(void){ 1603 // done. tell the app 1604 log_info("hci_init_done -> HCI_STATE_WORKING"); 1605 hci_stack->state = HCI_STATE_WORKING; 1606 hci_emit_state(); 1607 hci_run(); 1608 } 1609 1610 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1611 bool command_completed = false; 1612 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1613 uint16_t opcode = little_endian_read_16(packet,3); 1614 if (opcode == hci_stack->last_cmd_opcode){ 1615 command_completed = true; 1616 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1617 } else { 1618 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1619 } 1620 } 1621 1622 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1623 uint8_t status = packet[2]; 1624 uint16_t opcode = little_endian_read_16(packet,4); 1625 if (opcode == hci_stack->last_cmd_opcode){ 1626 if (status){ 1627 command_completed = true; 1628 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1629 } else { 1630 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1631 } 1632 } else { 1633 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1634 } 1635 } 1636 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1637 // Vendor == CSR 1638 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1639 // TODO: track actual command 1640 command_completed = true; 1641 } 1642 1643 // Vendor == Toshiba 1644 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1645 // TODO: track actual command 1646 command_completed = true; 1647 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1648 hci_stack->num_cmd_packets = 1; 1649 } 1650 #endif 1651 1652 return command_completed; 1653 } 1654 1655 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1656 1657 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1658 1659 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1660 1661 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1662 1663 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1664 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1665 // 1666 // HCI Reset 1667 // Timeout 100 ms 1668 // HCI Reset 1669 // Command Complete Reset 1670 // HCI Read Local Version Information 1671 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1672 // hang... 1673 // 1674 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1675 if (!command_completed 1676 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1677 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1678 1679 uint16_t opcode = little_endian_read_16(packet,3); 1680 if (opcode == hci_reset.opcode){ 1681 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1682 return; 1683 } 1684 } 1685 1686 // CSR & H5 1687 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1688 if (!command_completed 1689 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1690 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1691 1692 uint16_t opcode = little_endian_read_16(packet,3); 1693 if (opcode == hci_reset.opcode){ 1694 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1695 return; 1696 } 1697 } 1698 1699 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1700 // fix: Correct substate and behave as command below 1701 if (command_completed){ 1702 switch (hci_stack->substate){ 1703 case HCI_INIT_SEND_RESET: 1704 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1705 break; 1706 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1707 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1708 break; 1709 default: 1710 break; 1711 } 1712 } 1713 1714 #endif 1715 1716 if (!command_completed) return; 1717 1718 bool need_baud_change = false; 1719 bool need_addr_change = false; 1720 1721 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1722 need_baud_change = hci_stack->config 1723 && hci_stack->chipset 1724 && hci_stack->chipset->set_baudrate_command 1725 && hci_stack->hci_transport->set_baudrate 1726 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1727 1728 need_addr_change = hci_stack->custom_bd_addr_set 1729 && hci_stack->chipset 1730 && hci_stack->chipset->set_bd_addr_command; 1731 #endif 1732 1733 switch(hci_stack->substate){ 1734 1735 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1736 case HCI_INIT_SEND_RESET: 1737 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1738 // fix: just correct substate and behave as command below 1739 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1740 btstack_run_loop_remove_timer(&hci_stack->timeout); 1741 break; 1742 case HCI_INIT_W4_SEND_RESET: 1743 btstack_run_loop_remove_timer(&hci_stack->timeout); 1744 break; 1745 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1746 log_info("Received local name, need baud change %d", (int) need_baud_change); 1747 if (need_baud_change){ 1748 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1749 return; 1750 } 1751 // skip baud change 1752 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1753 return; 1754 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1755 // for STLC2500D, baud rate change already happened. 1756 // for others, baud rate gets changed now 1757 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1758 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1759 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1760 hci_stack->hci_transport->set_baudrate(baud_rate); 1761 } 1762 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1763 return; 1764 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1765 btstack_run_loop_remove_timer(&hci_stack->timeout); 1766 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1767 return; 1768 case HCI_INIT_W4_CUSTOM_INIT: 1769 // repeat custom init 1770 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1771 return; 1772 #else 1773 case HCI_INIT_W4_SEND_RESET: 1774 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1775 return ; 1776 #endif 1777 1778 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1779 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1780 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1781 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1782 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1783 return; 1784 } 1785 if (need_addr_change){ 1786 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1787 return; 1788 } 1789 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1790 return; 1791 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1792 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1793 if (need_baud_change){ 1794 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1795 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1796 hci_stack->hci_transport->set_baudrate(baud_rate); 1797 } 1798 if (need_addr_change){ 1799 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1800 return; 1801 } 1802 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1803 return; 1804 case HCI_INIT_W4_SET_BD_ADDR: 1805 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1806 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1807 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1808 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1809 return; 1810 } 1811 // skipping st warm boot 1812 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1813 return; 1814 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1815 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1816 return; 1817 #endif 1818 case HCI_INIT_W4_READ_BD_ADDR: 1819 // only read buffer size if supported 1820 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1821 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1822 return; 1823 } 1824 // skipping read buffer size 1825 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1826 return; 1827 case HCI_INIT_W4_SET_EVENT_MASK: 1828 // skip Classic init commands for LE only chipsets 1829 if (!hci_classic_supported()){ 1830 #ifdef ENABLE_BLE 1831 if (hci_le_supported()){ 1832 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1833 return; 1834 } 1835 #endif 1836 log_error("Neither BR/EDR nor LE supported"); 1837 hci_init_done(); 1838 return; 1839 } 1840 if (!gap_ssp_supported()){ 1841 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1842 return; 1843 } 1844 break; 1845 #ifdef ENABLE_BLE 1846 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1847 // skip write le host if not supported (e.g. on LE only EM9301) 1848 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1849 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1850 return; 1851 1852 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1853 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1854 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1855 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1856 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1857 return; 1858 } 1859 // explicit fall through to reduce repetitions 1860 1861 #ifdef ENABLE_LE_CENTRAL 1862 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1863 #else 1864 hci_init_done(); 1865 #endif 1866 return; 1867 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1868 1869 #endif /* ENABLE_BLE */ 1870 1871 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1872 // skip write secure connections host support if not supported or disabled 1873 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1874 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1875 return; 1876 } 1877 break; 1878 1879 #ifdef ENABLE_SCO_OVER_HCI 1880 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1881 // skip write synchronous flow control if not supported 1882 if (hci_stack->local_supported_commands[0] & 0x04) break; 1883 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1884 1885 /* fall through */ 1886 1887 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1888 // skip write default erroneous data reporting if not supported 1889 if (hci_stack->local_supported_commands[0] & 0x08) break; 1890 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1891 1892 /* fall through */ 1893 1894 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1895 // skip bcm set sco pcm config on non-Broadcom chipsets 1896 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1897 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1898 1899 /* fall through */ 1900 1901 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1902 if (!hci_le_supported()){ 1903 // SKIP LE init for Classic only configuration 1904 hci_init_done(); 1905 return; 1906 } 1907 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1908 break; 1909 1910 #else /* !ENABLE_SCO_OVER_HCI */ 1911 1912 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1913 #ifdef ENABLE_SCO_OVER_PCM 1914 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1915 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1916 return; 1917 } 1918 #endif 1919 /* fall through */ 1920 1921 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1922 #ifdef ENABLE_BLE 1923 if (hci_le_supported()){ 1924 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1925 return; 1926 } 1927 #endif 1928 // SKIP LE init for Classic only configuration 1929 hci_init_done(); 1930 return; 1931 #endif /* ENABLE_SCO_OVER_HCI */ 1932 1933 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1934 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1935 // Response to command before init done state -> init done 1936 case (HCI_INIT_DONE-1): 1937 hci_init_done(); 1938 return; 1939 #endif 1940 1941 default: 1942 break; 1943 } 1944 hci_initializing_next_state(); 1945 } 1946 1947 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1948 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1949 bd_addr_t bd_address; 1950 (void)memcpy(&bd_address, conn->address, 6); 1951 1952 #ifdef ENABLE_CLASSIC 1953 // cache needed data 1954 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1955 #endif 1956 1957 // connection failed, remove entry 1958 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1959 btstack_memory_hci_connection_free( conn ); 1960 1961 #ifdef ENABLE_CLASSIC 1962 // notify client if dedicated bonding 1963 if (notify_dedicated_bonding_failed){ 1964 log_info("hci notify_dedicated_bonding_failed"); 1965 hci_emit_dedicated_bonding_result(bd_address, status); 1966 } 1967 1968 // if authentication error, also delete link key 1969 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1970 gap_drop_link_key_for_bd_addr(bd_address); 1971 } 1972 #else 1973 UNUSED(status); 1974 #endif 1975 } 1976 1977 #ifdef ENABLE_CLASSIC 1978 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1979 // SSP Controller 1980 if (features[6] & (1 << 3)){ 1981 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1982 } 1983 // eSCO 1984 if (features[3] & (1<<7)){ 1985 conn->remote_supported_features[0] |= 1; 1986 } 1987 // Extended features 1988 if (features[7] & (1<<7)){ 1989 conn->remote_supported_features[0] |= 2; 1990 } 1991 } 1992 1993 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1994 // SSP Host 1995 if (features[0] & (1 << 0)){ 1996 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1997 } 1998 // SC Host 1999 if (features[0] & (1 << 3)){ 2000 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2001 } 2002 } 2003 2004 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2005 // SC Controller 2006 if (features[1] & (1 << 0)){ 2007 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2008 } 2009 } 2010 2011 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2012 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2013 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2014 if (conn->bonding_flags & BONDING_DEDICATED){ 2015 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2016 } 2017 } 2018 #endif 2019 2020 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2021 // handle BT initialization 2022 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2023 hci_initializing_event_handler(packet, size); 2024 } 2025 2026 // help with BT sleep 2027 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2028 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2029 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2030 hci_initializing_next_state(); 2031 } 2032 } 2033 2034 #ifdef ENABLE_CLASSIC 2035 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2036 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2037 conn->encryption_key_size = encryption_key_size; 2038 2039 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 2040 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2041 return; 2042 } 2043 2044 // Request Authentication if not already done 2045 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2046 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2047 } 2048 #endif 2049 2050 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2051 UNUSED(size); 2052 2053 uint16_t manufacturer; 2054 #ifdef ENABLE_CLASSIC 2055 hci_con_handle_t handle; 2056 hci_connection_t * conn; 2057 uint8_t status; 2058 #endif 2059 // get num cmd packets - limit to 1 to reduce complexity 2060 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2061 2062 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2063 switch (opcode){ 2064 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2065 if (packet[5]) break; 2066 // terminate, name 248 chars 2067 packet[6+248] = 0; 2068 log_info("local name: %s", &packet[6]); 2069 break; 2070 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2071 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2072 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2073 uint16_t acl_len = little_endian_read_16(packet, 6); 2074 uint16_t sco_len = packet[8]; 2075 2076 // determine usable ACL/SCO payload size 2077 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2078 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2079 2080 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2081 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2082 2083 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2084 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2085 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2086 } 2087 break; 2088 case HCI_OPCODE_HCI_READ_RSSI: 2089 if (packet[5] == ERROR_CODE_SUCCESS){ 2090 uint8_t event[5]; 2091 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2092 event[1] = 3; 2093 (void)memcpy(&event[2], &packet[6], 3); 2094 hci_emit_event(event, sizeof(event), 1); 2095 } 2096 break; 2097 #ifdef ENABLE_BLE 2098 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2099 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2100 hci_stack->le_acl_packets_total_num = packet[8]; 2101 // determine usable ACL payload size 2102 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2103 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2104 } 2105 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2106 break; 2107 #endif 2108 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2109 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2110 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2111 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2112 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); 2113 break; 2114 #endif 2115 #ifdef ENABLE_LE_CENTRAL 2116 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2117 hci_stack->le_whitelist_capacity = packet[6]; 2118 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2119 break; 2120 #endif 2121 case HCI_OPCODE_HCI_READ_BD_ADDR: 2122 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2123 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)); 2124 #ifdef ENABLE_CLASSIC 2125 if (hci_stack->link_key_db){ 2126 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2127 } 2128 #endif 2129 break; 2130 #ifdef ENABLE_CLASSIC 2131 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2132 hci_emit_discoverable_enabled(hci_stack->discoverable); 2133 break; 2134 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2135 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2136 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2137 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2138 hci_emit_event(event, sizeof(event), 1); 2139 } 2140 break; 2141 #endif 2142 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2143 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2144 2145 #ifdef ENABLE_CLASSIC 2146 // determine usable ACL packet types based on host buffer size and supported features 2147 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2148 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2149 #endif 2150 // Classic/LE 2151 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2152 break; 2153 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2154 manufacturer = little_endian_read_16(packet, 10); 2155 // map Cypress to Broadcom 2156 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2157 log_info("Treat Cypress as Broadcom"); 2158 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2159 little_endian_store_16(packet, 10, manufacturer); 2160 } 2161 hci_stack->manufacturer = manufacturer; 2162 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2163 break; 2164 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2165 hci_stack->local_supported_commands[0] = 2166 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2167 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2168 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2169 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2170 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2171 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2172 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2173 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2174 hci_stack->local_supported_commands[1] = 2175 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2176 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2177 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2178 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2179 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2180 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2181 break; 2182 #ifdef ENABLE_CLASSIC 2183 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2184 if (packet[5]) return; 2185 hci_stack->synchronous_flow_control_enabled = 1; 2186 break; 2187 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2188 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2189 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2190 conn = hci_connection_for_handle(handle); 2191 if (conn != NULL) { 2192 uint8_t key_size = 0; 2193 if (status == 0){ 2194 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2195 log_info("Handle %04x key Size: %u", handle, key_size); 2196 } else { 2197 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2198 } 2199 hci_handle_read_encryption_key_size_complete(conn, key_size); 2200 } 2201 break; 2202 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2203 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2204 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2205 uint8_t event[67]; 2206 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2207 event[1] = 65; 2208 (void)memset(&event[2], 0, 65); 2209 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2210 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2211 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2212 event[2] = 3; 2213 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2214 } else { 2215 event[2] = 1; 2216 } 2217 } 2218 hci_emit_event(event, sizeof(event), 0); 2219 break; 2220 } 2221 #endif 2222 #endif 2223 default: 2224 break; 2225 } 2226 } 2227 2228 #ifdef ENABLE_BLE 2229 static void event_handle_le_connection_complete(const uint8_t * packet){ 2230 bd_addr_t addr; 2231 bd_addr_type_t addr_type; 2232 hci_connection_t * conn; 2233 2234 // Connection management 2235 reverse_bd_addr(&packet[8], addr); 2236 addr_type = (bd_addr_type_t)packet[7]; 2237 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2238 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2239 2240 #ifdef ENABLE_LE_CENTRAL 2241 // handle error: error is reported only to the initiator -> outgoing connection 2242 if (packet[3]){ 2243 2244 // handle cancelled outgoing connection 2245 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2246 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2247 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2248 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2249 // whitelist connect 2250 if (hci_is_le_connection_type(addr_type)){ 2251 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2252 } 2253 // get outgoing connection conn struct for direct connect 2254 conn = gap_get_outgoing_connection(); 2255 } 2256 2257 // outgoing le connection establishment is done 2258 if (conn){ 2259 // remove entry 2260 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2261 btstack_memory_hci_connection_free( conn ); 2262 } 2263 return; 2264 } 2265 #endif 2266 2267 // on success, both hosts receive connection complete event 2268 if (packet[6] == HCI_ROLE_MASTER){ 2269 #ifdef ENABLE_LE_CENTRAL 2270 // if we're master on an le connection, it was an outgoing connection and we're done with it 2271 // note: no hci_connection_t object exists yet for connect with whitelist 2272 if (hci_is_le_connection_type(addr_type)){ 2273 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2274 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2275 } 2276 #endif 2277 } else { 2278 #ifdef ENABLE_LE_PERIPHERAL 2279 // if we're slave, it was an incoming connection, advertisements have stopped 2280 hci_stack->le_advertisements_active = false; 2281 #endif 2282 } 2283 2284 // LE connections are auto-accepted, so just create a connection if there isn't one already 2285 if (!conn){ 2286 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2287 } 2288 2289 // no memory, sorry. 2290 if (!conn){ 2291 return; 2292 } 2293 2294 conn->state = OPEN; 2295 conn->role = packet[6]; 2296 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2297 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2298 2299 #ifdef ENABLE_LE_PERIPHERAL 2300 if (packet[6] == HCI_ROLE_SLAVE){ 2301 hci_update_advertisements_enabled_for_current_roles(); 2302 } 2303 #endif 2304 2305 // init unenhanced att bearer mtu 2306 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2307 conn->att_connection.mtu_exchanged = false; 2308 2309 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2310 2311 // restart timer 2312 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2313 // btstack_run_loop_add_timer(&conn->timeout); 2314 2315 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2316 2317 hci_emit_nr_connections_changed(); 2318 } 2319 #endif 2320 2321 static void event_handler(uint8_t *packet, uint16_t size){ 2322 2323 uint16_t event_length = packet[1]; 2324 2325 // assert packet is complete 2326 if (size != (event_length + 2u)){ 2327 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2328 return; 2329 } 2330 2331 bd_addr_type_t addr_type; 2332 hci_con_handle_t handle; 2333 hci_connection_t * conn; 2334 int i; 2335 int create_connection_cmd; 2336 2337 #ifdef ENABLE_CLASSIC 2338 hci_link_type_t link_type; 2339 bd_addr_t addr; 2340 #endif 2341 2342 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2343 2344 switch (hci_event_packet_get_type(packet)) { 2345 2346 case HCI_EVENT_COMMAND_COMPLETE: 2347 handle_command_complete_event(packet, size); 2348 break; 2349 2350 case HCI_EVENT_COMMAND_STATUS: 2351 // get num cmd packets - limit to 1 to reduce complexity 2352 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2353 2354 // check command status to detected failed outgoing connections 2355 create_connection_cmd = 0; 2356 #ifdef ENABLE_CLASSIC 2357 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2358 create_connection_cmd = 1; 2359 } 2360 #endif 2361 #ifdef ENABLE_LE_CENTRAL 2362 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2363 create_connection_cmd = 1; 2364 } 2365 #endif 2366 if (create_connection_cmd) { 2367 uint8_t status = hci_event_command_status_get_status(packet); 2368 addr_type = hci_stack->outgoing_addr_type; 2369 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2370 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); 2371 2372 // reset outgoing address info 2373 memset(hci_stack->outgoing_addr, 0, 6); 2374 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2375 2376 // on error 2377 if (status != ERROR_CODE_SUCCESS){ 2378 #ifdef ENABLE_LE_CENTRAL 2379 if (hci_is_le_connection_type(addr_type)){ 2380 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2381 } 2382 #endif 2383 // error => outgoing connection failed 2384 if (conn != NULL){ 2385 hci_handle_connection_failed(conn, status); 2386 } 2387 } 2388 } 2389 2390 #ifdef ENABLE_CLASSIC 2391 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2392 uint8_t status = hci_event_command_status_get_status(packet); 2393 log_info("command status (inquiry), status %x", status); 2394 if (status == ERROR_CODE_SUCCESS) { 2395 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2396 } else { 2397 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2398 } 2399 } 2400 #endif 2401 break; 2402 2403 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2404 if (size < 3) return; 2405 uint16_t num_handles = packet[2]; 2406 if (size != (3u + num_handles * 4u)) return; 2407 uint16_t offset = 3; 2408 for (i=0; i<num_handles;i++){ 2409 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2410 offset += 2u; 2411 uint16_t num_packets = little_endian_read_16(packet, offset); 2412 offset += 2u; 2413 2414 conn = hci_connection_for_handle(handle); 2415 if (!conn){ 2416 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2417 continue; 2418 } 2419 2420 if (conn->num_packets_sent >= num_packets){ 2421 conn->num_packets_sent -= num_packets; 2422 } else { 2423 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2424 conn->num_packets_sent = 0; 2425 } 2426 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2427 2428 #ifdef ENABLE_CLASSIC 2429 // For SCO, we do the can_send_now_check here 2430 hci_notify_if_sco_can_send_now(); 2431 #endif 2432 } 2433 break; 2434 } 2435 2436 #ifdef ENABLE_CLASSIC 2437 case HCI_EVENT_INQUIRY_COMPLETE: 2438 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2439 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2440 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2441 hci_emit_event(event, sizeof(event), 1); 2442 } 2443 break; 2444 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2445 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2446 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2447 } 2448 break; 2449 case HCI_EVENT_CONNECTION_REQUEST: 2450 reverse_bd_addr(&packet[2], addr); 2451 link_type = (hci_link_type_t) packet[11]; 2452 if (hci_stack->gap_classic_accept_callback != NULL){ 2453 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2454 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2455 bd_addr_copy(hci_stack->decline_addr, addr); 2456 break; 2457 } 2458 } 2459 2460 // TODO: eval COD 8-10 2461 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2462 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2463 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2464 if (!conn) { 2465 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2466 } 2467 if (!conn) { 2468 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2469 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2470 bd_addr_copy(hci_stack->decline_addr, addr); 2471 break; 2472 } 2473 conn->role = HCI_ROLE_SLAVE; 2474 conn->state = RECEIVED_CONNECTION_REQUEST; 2475 // store info about eSCO 2476 if (link_type == HCI_LINK_TYPE_ESCO){ 2477 conn->remote_supported_features[0] |= 1; 2478 } 2479 hci_run(); 2480 break; 2481 2482 case HCI_EVENT_CONNECTION_COMPLETE: 2483 // Connection management 2484 reverse_bd_addr(&packet[5], addr); 2485 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2486 addr_type = BD_ADDR_TYPE_ACL; 2487 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2488 if (conn) { 2489 if (!packet[2]){ 2490 conn->state = OPEN; 2491 conn->con_handle = little_endian_read_16(packet, 3); 2492 2493 // queue get remote feature 2494 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2495 2496 // queue set supervision timeout if we're master 2497 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2498 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2499 } 2500 2501 // restart timer 2502 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2503 btstack_run_loop_add_timer(&conn->timeout); 2504 2505 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2506 2507 hci_emit_nr_connections_changed(); 2508 } else { 2509 // connection failed 2510 hci_handle_connection_failed(conn, packet[2]); 2511 } 2512 } 2513 break; 2514 2515 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2516 reverse_bd_addr(&packet[5], addr); 2517 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2518 if (packet[2]){ 2519 // connection failed 2520 break; 2521 } 2522 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2523 if (!conn) { 2524 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2525 } 2526 if (!conn) { 2527 break; 2528 } 2529 conn->state = OPEN; 2530 conn->con_handle = little_endian_read_16(packet, 3); 2531 2532 #ifdef ENABLE_SCO_OVER_HCI 2533 // update SCO 2534 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2535 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2536 } 2537 // trigger can send now 2538 if (hci_have_usb_transport()){ 2539 hci_stack->sco_can_send_now = 1; 2540 } 2541 #endif 2542 #ifdef HAVE_SCO_TRANSPORT 2543 // configure sco transport 2544 if (hci_stack->sco_transport != NULL){ 2545 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2546 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2547 } 2548 #endif 2549 break; 2550 2551 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2552 handle = little_endian_read_16(packet, 3); 2553 conn = hci_connection_for_handle(handle); 2554 if (!conn) break; 2555 if (!packet[2]){ 2556 const uint8_t * features = &packet[5]; 2557 hci_handle_remote_features_page_0(conn, features); 2558 2559 // read extended features if possible 2560 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2561 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2562 break; 2563 } 2564 } 2565 hci_handle_remote_features_received(conn); 2566 break; 2567 2568 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2569 handle = little_endian_read_16(packet, 3); 2570 conn = hci_connection_for_handle(handle); 2571 if (!conn) break; 2572 // status = ok, page = 1 2573 if (!packet[2]) { 2574 uint8_t page_number = packet[5]; 2575 uint8_t maximum_page_number = packet[6]; 2576 const uint8_t * features = &packet[7]; 2577 bool done = false; 2578 switch (page_number){ 2579 case 1: 2580 hci_handle_remote_features_page_1(conn, features); 2581 if (maximum_page_number >= 2){ 2582 // get Secure Connections (Controller) from Page 2 if available 2583 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2584 } else { 2585 // otherwise, assume SC (Controller) == SC (Host) 2586 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2587 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2588 } 2589 done = true; 2590 } 2591 break; 2592 case 2: 2593 hci_handle_remote_features_page_2(conn, features); 2594 done = true; 2595 break; 2596 default: 2597 break; 2598 } 2599 if (!done) break; 2600 } 2601 hci_handle_remote_features_received(conn); 2602 break; 2603 2604 case HCI_EVENT_LINK_KEY_REQUEST: 2605 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2606 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2607 // request handled by hci_run() 2608 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2609 break; 2610 2611 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2612 reverse_bd_addr(&packet[2], addr); 2613 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2614 if (!conn) break; 2615 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2616 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2617 // Change Connection Encryption keeps link key type 2618 if (link_key_type != CHANGED_COMBINATION_KEY){ 2619 conn->link_key_type = link_key_type; 2620 } 2621 // only store link key: 2622 // - if bondable enabled 2623 if (hci_stack->bondable == false) break; 2624 // - for SSP, also check if remote side requested bonding as well 2625 if (conn->link_key_type != COMBINATION_KEY){ 2626 uint8_t auth_req_ignoring_mitm = conn->io_cap_response_auth_req & 0xfe; 2627 if (auth_req_ignoring_mitm == SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_NO_BONDING){ 2628 break; 2629 } 2630 } 2631 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2632 // still forward event to allow dismiss of pairing dialog 2633 break; 2634 } 2635 2636 case HCI_EVENT_PIN_CODE_REQUEST: 2637 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2638 // non-bondable mode: pin code negative reply will be sent 2639 if (!hci_stack->bondable){ 2640 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2641 hci_run(); 2642 return; 2643 } 2644 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2645 if (!hci_stack->link_key_db) break; 2646 hci_event_pin_code_request_get_bd_addr(packet, addr); 2647 hci_stack->link_key_db->delete_link_key(addr); 2648 break; 2649 2650 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2651 hci_event_io_capability_response_get_bd_addr(packet, addr); 2652 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2653 if (!conn) break; 2654 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2655 break; 2656 2657 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2658 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2659 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2660 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2661 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2662 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2663 } else { 2664 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2665 } 2666 #endif 2667 break; 2668 2669 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2670 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2671 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2672 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_REMOTE_OOB_DATA_REPLY); 2673 break; 2674 #endif 2675 2676 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2677 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2678 if (!hci_stack->ssp_auto_accept) break; 2679 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2680 break; 2681 2682 case HCI_EVENT_USER_PASSKEY_REQUEST: 2683 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2684 if (!hci_stack->ssp_auto_accept) break; 2685 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2686 break; 2687 2688 case HCI_EVENT_MODE_CHANGE: 2689 handle = hci_event_mode_change_get_handle(packet); 2690 conn = hci_connection_for_handle(handle); 2691 if (!conn) break; 2692 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2693 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2694 break; 2695 #endif 2696 2697 case HCI_EVENT_ENCRYPTION_CHANGE: 2698 handle = hci_event_encryption_change_get_connection_handle(packet); 2699 conn = hci_connection_for_handle(handle); 2700 if (!conn) break; 2701 if (hci_event_encryption_change_get_status(packet) == 0u) { 2702 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2703 if (encryption_enabled){ 2704 if (hci_is_le_connection(conn)){ 2705 // For LE, we accept connection as encrypted 2706 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2707 } 2708 #ifdef ENABLE_CLASSIC 2709 else { 2710 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2711 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2712 bool connected_uses_aes_ccm = encryption_enabled == 2; 2713 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2714 log_info("SC during pairing, but only E0 now -> abort"); 2715 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2716 break; 2717 } 2718 2719 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2720 if (connected_uses_aes_ccm){ 2721 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2722 } 2723 2724 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2725 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2726 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2727 } else { 2728 // if not, pretend everything is perfect 2729 hci_handle_read_encryption_key_size_complete(conn, 16); 2730 } 2731 } 2732 #endif 2733 } else { 2734 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2735 } 2736 } 2737 2738 break; 2739 2740 #ifdef ENABLE_CLASSIC 2741 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2742 handle = hci_event_authentication_complete_get_connection_handle(packet); 2743 conn = hci_connection_for_handle(handle); 2744 if (!conn) break; 2745 2746 // ignore authentication event if we didn't request it 2747 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2748 2749 // dedicated bonding: send result and disconnect 2750 if (conn->bonding_flags & BONDING_DEDICATED){ 2751 conn->bonding_flags &= ~BONDING_DEDICATED; 2752 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2753 conn->bonding_status = packet[2]; 2754 break; 2755 } 2756 2757 // authenticated only if auth status == 0 2758 if (hci_event_authentication_complete_get_status(packet) == 0){ 2759 // authenticated 2760 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2761 2762 // If link key sufficient for requested security and not already encrypted, start encryption 2763 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2764 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2765 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2766 break; 2767 } 2768 } 2769 2770 // emit updated security level 2771 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2772 break; 2773 #endif 2774 2775 // HCI_EVENT_DISCONNECTION_COMPLETE 2776 // has been split, to first notify stack before shutting connection down 2777 // see end of function, too. 2778 case HCI_EVENT_DISCONNECTION_COMPLETE: 2779 if (packet[2]) break; // status != 0 2780 handle = little_endian_read_16(packet, 3); 2781 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2782 if (hci_stack->acl_fragmentation_total_size > 0u) { 2783 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2784 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2785 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2786 hci_stack->acl_fragmentation_total_size = 0; 2787 hci_stack->acl_fragmentation_pos = 0; 2788 if (release_buffer){ 2789 hci_release_packet_buffer(); 2790 } 2791 } 2792 } 2793 2794 conn = hci_connection_for_handle(handle); 2795 if (!conn) break; 2796 // mark connection for shutdown 2797 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2798 2799 // emit dedicatd bonding event 2800 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2801 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2802 } 2803 2804 #ifdef ENABLE_BLE 2805 #ifdef ENABLE_LE_PERIPHERAL 2806 // re-enable advertisements for le connections if active 2807 if (hci_is_le_connection(conn)){ 2808 hci_update_advertisements_enabled_for_current_roles(); 2809 } 2810 #endif 2811 #endif 2812 break; 2813 2814 case HCI_EVENT_HARDWARE_ERROR: 2815 log_error("Hardware Error: 0x%02x", packet[2]); 2816 if (hci_stack->hardware_error_callback){ 2817 (*hci_stack->hardware_error_callback)(packet[2]); 2818 } else { 2819 // if no special requests, just reboot stack 2820 hci_power_control_off(); 2821 hci_power_control_on(); 2822 } 2823 break; 2824 2825 #ifdef ENABLE_CLASSIC 2826 case HCI_EVENT_ROLE_CHANGE: 2827 if (packet[2]) break; // status != 0 2828 reverse_bd_addr(&packet[3], addr); 2829 addr_type = BD_ADDR_TYPE_ACL; 2830 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2831 if (!conn) break; 2832 conn->role = packet[9]; 2833 break; 2834 #endif 2835 2836 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2837 // release packet buffer only for asynchronous transport and if there are not further fragements 2838 if (hci_transport_synchronous()) { 2839 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2840 return; // instead of break: to avoid re-entering hci_run() 2841 } 2842 hci_stack->acl_fragmentation_tx_active = 0; 2843 if (hci_stack->acl_fragmentation_total_size) break; 2844 hci_release_packet_buffer(); 2845 2846 // L2CAP receives this event via the hci_emit_event below 2847 2848 #ifdef ENABLE_CLASSIC 2849 // For SCO, we do the can_send_now_check here 2850 hci_notify_if_sco_can_send_now(); 2851 #endif 2852 break; 2853 2854 #ifdef ENABLE_CLASSIC 2855 case HCI_EVENT_SCO_CAN_SEND_NOW: 2856 // For SCO, we do the can_send_now_check here 2857 hci_stack->sco_can_send_now = 1; 2858 hci_notify_if_sco_can_send_now(); 2859 return; 2860 2861 // explode inquriy results for easier consumption 2862 case HCI_EVENT_INQUIRY_RESULT: 2863 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2864 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2865 gap_inquiry_explode(packet, size); 2866 break; 2867 #endif 2868 2869 #ifdef ENABLE_BLE 2870 case HCI_EVENT_LE_META: 2871 switch (packet[2]){ 2872 #ifdef ENABLE_LE_CENTRAL 2873 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2874 // log_info("advertising report received"); 2875 if (!hci_stack->le_scanning_enabled) break; 2876 le_handle_advertisement_report(packet, size); 2877 break; 2878 #endif 2879 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2880 event_handle_le_connection_complete(packet); 2881 break; 2882 2883 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2884 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2885 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2886 conn = hci_connection_for_handle(handle); 2887 if (!conn) break; 2888 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2889 break; 2890 2891 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2892 // connection 2893 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2894 conn = hci_connection_for_handle(handle); 2895 if (conn) { 2896 // read arguments 2897 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2898 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2899 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2900 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2901 2902 // validate against current connection parameter range 2903 le_connection_parameter_range_t existing_range; 2904 gap_get_connection_parameter_range(&existing_range); 2905 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2906 if (update_parameter){ 2907 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2908 conn->le_conn_interval_min = le_conn_interval_min; 2909 conn->le_conn_interval_max = le_conn_interval_max; 2910 conn->le_conn_latency = le_conn_latency; 2911 conn->le_supervision_timeout = le_supervision_timeout; 2912 } else { 2913 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 2914 } 2915 } 2916 break; 2917 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2918 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2919 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2920 conn = hci_connection_for_handle(handle); 2921 if (conn) { 2922 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2923 } 2924 break; 2925 #endif 2926 default: 2927 break; 2928 } 2929 break; 2930 #endif 2931 case HCI_EVENT_VENDOR_SPECIFIC: 2932 // Vendor specific commands often create vendor specific event instead of num completed packets 2933 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2934 switch (hci_stack->manufacturer){ 2935 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2936 hci_stack->num_cmd_packets = 1; 2937 break; 2938 default: 2939 break; 2940 } 2941 break; 2942 default: 2943 break; 2944 } 2945 2946 handle_event_for_current_stack_state(packet, size); 2947 2948 // notify upper stack 2949 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2950 2951 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2952 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 2953 handle = little_endian_read_16(packet, 3); 2954 hci_connection_t * aConn = hci_connection_for_handle(handle); 2955 // discard connection if app did not trigger a reconnect in the event handler 2956 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2957 hci_shutdown_connection(aConn); 2958 } 2959 } 2960 2961 // execute main loop 2962 hci_run(); 2963 } 2964 2965 #ifdef ENABLE_CLASSIC 2966 2967 #ifdef ENABLE_SCO_OVER_HCI 2968 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2969 static void sco_schedule_tx(hci_connection_t * conn); 2970 2971 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2972 log_debug("SCO TX Timeout"); 2973 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2974 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2975 if (!conn) return; 2976 2977 // trigger send 2978 conn->sco_tx_ready = 1; 2979 // extra packet if CVSD but SCO buffer is too short 2980 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2981 conn->sco_tx_ready++; 2982 } 2983 hci_notify_if_sco_can_send_now(); 2984 } 2985 2986 2987 #define SCO_TX_AFTER_RX_MS (6) 2988 2989 static void sco_schedule_tx(hci_connection_t * conn){ 2990 2991 uint32_t now = btstack_run_loop_get_time_ms(); 2992 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2993 int time_delta_ms = sco_tx_ms - now; 2994 2995 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2996 2997 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2998 btstack_run_loop_set_timer(timer, time_delta_ms); 2999 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3000 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3001 btstack_run_loop_add_timer(timer); 3002 } 3003 #endif 3004 3005 static void sco_handler(uint8_t * packet, uint16_t size){ 3006 // lookup connection struct 3007 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3008 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3009 if (!conn) return; 3010 3011 #ifdef ENABLE_SCO_OVER_HCI 3012 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3013 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3014 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3015 packet[2] = 0x3c; 3016 memmove(&packet[3], &packet[23], 63); 3017 size = 63; 3018 } 3019 } 3020 3021 if (hci_have_usb_transport()){ 3022 // Nothing to do 3023 } else { 3024 // 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); 3025 if (hci_stack->synchronous_flow_control_enabled == 0){ 3026 uint32_t now = btstack_run_loop_get_time_ms(); 3027 3028 if (!conn->sco_rx_valid){ 3029 // ignore first 10 packets 3030 conn->sco_rx_count++; 3031 // log_debug("sco rx count %u", conn->sco_rx_count); 3032 if (conn->sco_rx_count == 10) { 3033 // use first timestamp as is and pretent it just started 3034 conn->sco_rx_ms = now; 3035 conn->sco_rx_valid = 1; 3036 conn->sco_rx_count = 0; 3037 sco_schedule_tx(conn); 3038 } 3039 } else { 3040 // track expected arrival timme 3041 conn->sco_rx_count++; 3042 conn->sco_rx_ms += 7; 3043 int delta = (int32_t) (now - conn->sco_rx_ms); 3044 if (delta > 0){ 3045 conn->sco_rx_ms++; 3046 } 3047 // log_debug("sco rx %u", conn->sco_rx_ms); 3048 sco_schedule_tx(conn); 3049 } 3050 } 3051 } 3052 #endif 3053 3054 // deliver to app 3055 if (hci_stack->sco_packet_handler) { 3056 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3057 } 3058 3059 #ifdef HAVE_SCO_TRANSPORT 3060 // We can send one packet for each received packet 3061 conn->sco_tx_ready++; 3062 hci_notify_if_sco_can_send_now(); 3063 #endif 3064 3065 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3066 conn->num_packets_completed++; 3067 hci_stack->host_completed_packets = 1; 3068 hci_run(); 3069 #endif 3070 } 3071 #endif 3072 3073 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3074 hci_dump_packet(packet_type, 1, packet, size); 3075 switch (packet_type) { 3076 case HCI_EVENT_PACKET: 3077 event_handler(packet, size); 3078 break; 3079 case HCI_ACL_DATA_PACKET: 3080 acl_handler(packet, size); 3081 break; 3082 #ifdef ENABLE_CLASSIC 3083 case HCI_SCO_DATA_PACKET: 3084 sco_handler(packet, size); 3085 break; 3086 #endif 3087 default: 3088 break; 3089 } 3090 } 3091 3092 /** 3093 * @brief Add event packet handler. 3094 */ 3095 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3096 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3097 } 3098 3099 3100 /** Register HCI packet handlers */ 3101 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3102 hci_stack->acl_packet_handler = handler; 3103 } 3104 3105 #ifdef ENABLE_CLASSIC 3106 /** 3107 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3108 */ 3109 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3110 hci_stack->sco_packet_handler = handler; 3111 } 3112 #endif 3113 3114 static void hci_state_reset(void){ 3115 // no connections yet 3116 hci_stack->connections = NULL; 3117 3118 // keep discoverable/connectable as this has been requested by the client(s) 3119 // hci_stack->discoverable = 0; 3120 // hci_stack->connectable = 0; 3121 // hci_stack->bondable = 1; 3122 // hci_stack->own_addr_type = 0; 3123 3124 // buffer is free 3125 hci_stack->hci_packet_buffer_reserved = 0; 3126 3127 // no pending cmds 3128 hci_stack->decline_reason = 0; 3129 hci_stack->new_scan_enable_value = 0xff; 3130 3131 hci_stack->secure_connections_active = false; 3132 3133 #ifdef ENABLE_CLASSIC 3134 hci_stack->new_page_scan_interval = 0xffff; 3135 hci_stack->new_page_scan_window = 0xffff; 3136 hci_stack->new_page_scan_type = 0xff; 3137 #endif 3138 3139 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3140 hci_stack->classic_read_local_oob_data = true; 3141 #endif 3142 3143 // LE 3144 #ifdef ENABLE_BLE 3145 memset(hci_stack->le_random_address, 0, 6); 3146 hci_stack->le_random_address_set = 0; 3147 #endif 3148 #ifdef ENABLE_LE_CENTRAL 3149 hci_stack->le_scanning_active = 0; 3150 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3151 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3152 hci_stack->le_whitelist_capacity = 0; 3153 #endif 3154 } 3155 3156 #ifdef ENABLE_CLASSIC 3157 /** 3158 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3159 */ 3160 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3161 // store and open remote device db 3162 hci_stack->link_key_db = link_key_db; 3163 if (hci_stack->link_key_db) { 3164 hci_stack->link_key_db->open(); 3165 } 3166 } 3167 #endif 3168 3169 void hci_init(const hci_transport_t *transport, const void *config){ 3170 3171 #ifdef HAVE_MALLOC 3172 if (!hci_stack) { 3173 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3174 } 3175 #else 3176 hci_stack = &hci_stack_static; 3177 #endif 3178 memset(hci_stack, 0, sizeof(hci_stack_t)); 3179 3180 // reference to use transport layer implementation 3181 hci_stack->hci_transport = transport; 3182 3183 // reference to used config 3184 hci_stack->config = config; 3185 3186 // setup pointer for outgoing packet buffer 3187 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3188 3189 // max acl payload size defined in config.h 3190 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3191 3192 // register packet handlers with transport 3193 transport->register_packet_handler(&packet_handler); 3194 3195 hci_stack->state = HCI_STATE_OFF; 3196 3197 // class of device 3198 hci_stack->class_of_device = 0x007a020c; // Smartphone 3199 3200 // bondable by default 3201 hci_stack->bondable = 1; 3202 3203 #ifdef ENABLE_CLASSIC 3204 // classic name 3205 hci_stack->local_name = default_classic_name; 3206 3207 // Master slave policy 3208 hci_stack->master_slave_policy = 1; 3209 3210 // Allow Role Switch 3211 hci_stack->allow_role_switch = 1; 3212 3213 // Default / minimum security level = 2 3214 hci_stack->gap_security_level = LEVEL_2; 3215 3216 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3217 hci_stack->gap_required_encyrption_key_size = 7; 3218 3219 // Link Supervision Timeout 3220 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3221 3222 #endif 3223 3224 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3225 hci_stack->ssp_enable = 1; 3226 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3227 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3228 hci_stack->ssp_auto_accept = 1; 3229 3230 // Secure Connections: enable (requires support from Controller) 3231 hci_stack->secure_connections_enable = true; 3232 3233 // voice setting - signed 16 bit pcm data with CVSD over the air 3234 hci_stack->sco_voice_setting = 0x60; 3235 3236 #ifdef ENABLE_LE_CENTRAL 3237 // connection parameter to use for outgoing connections 3238 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3239 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3240 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3241 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3242 hci_stack->le_connection_latency = 4; // 4 3243 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3244 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3245 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3246 3247 // default LE Scanning 3248 hci_stack->le_scan_type = 0x1; // active 3249 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3250 hci_stack->le_scan_window = 0x30; // 30 ms 3251 #endif 3252 3253 #ifdef ENABLE_LE_PERIPHERAL 3254 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3255 #endif 3256 3257 // connection parameter range used to answer connection parameter update requests in l2cap 3258 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3259 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3260 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3261 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3262 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3263 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3264 3265 hci_state_reset(); 3266 } 3267 3268 void hci_deinit(void){ 3269 #ifdef HAVE_MALLOC 3270 if (hci_stack) { 3271 free(hci_stack); 3272 } 3273 #endif 3274 hci_stack = NULL; 3275 3276 #ifdef ENABLE_CLASSIC 3277 disable_l2cap_timeouts = 0; 3278 #endif 3279 } 3280 3281 /** 3282 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3283 */ 3284 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3285 hci_stack->chipset = chipset_driver; 3286 3287 // reset chipset driver - init is also called on power_up 3288 if (hci_stack->chipset && hci_stack->chipset->init){ 3289 hci_stack->chipset->init(hci_stack->config); 3290 } 3291 } 3292 3293 /** 3294 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3295 */ 3296 void hci_set_control(const btstack_control_t *hardware_control){ 3297 // references to used control implementation 3298 hci_stack->control = hardware_control; 3299 // init with transport config 3300 hardware_control->init(hci_stack->config); 3301 } 3302 3303 void hci_close(void){ 3304 // close remote device db 3305 if (hci_stack->link_key_db) { 3306 hci_stack->link_key_db->close(); 3307 } 3308 3309 btstack_linked_list_iterator_t lit; 3310 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3311 while (btstack_linked_list_iterator_has_next(&lit)){ 3312 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3313 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3314 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3315 hci_shutdown_connection(connection); 3316 } 3317 3318 hci_power_control(HCI_POWER_OFF); 3319 3320 #ifdef HAVE_MALLOC 3321 free(hci_stack); 3322 #endif 3323 hci_stack = NULL; 3324 } 3325 3326 #ifdef HAVE_SCO_TRANSPORT 3327 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3328 hci_stack->sco_transport = sco_transport; 3329 sco_transport->register_packet_handler(&packet_handler); 3330 } 3331 #endif 3332 3333 #ifdef ENABLE_CLASSIC 3334 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3335 // validate ranage and set 3336 if (encryption_key_size < 7) return; 3337 if (encryption_key_size > 16) return; 3338 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3339 } 3340 3341 void gap_set_security_level(gap_security_level_t security_level){ 3342 hci_stack->gap_security_level = security_level; 3343 } 3344 3345 gap_security_level_t gap_get_security_level(void){ 3346 return hci_stack->gap_security_level; 3347 } 3348 #endif 3349 3350 #ifdef ENABLE_CLASSIC 3351 void gap_set_class_of_device(uint32_t class_of_device){ 3352 hci_stack->class_of_device = class_of_device; 3353 } 3354 3355 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3356 hci_stack->default_link_policy_settings = default_link_policy_settings; 3357 } 3358 3359 void gap_set_allow_role_switch(bool allow_role_switch){ 3360 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3361 } 3362 3363 uint8_t hci_get_allow_role_switch(void){ 3364 return hci_stack->allow_role_switch; 3365 } 3366 3367 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3368 hci_stack->link_supervision_timeout = link_supervision_timeout; 3369 } 3370 3371 void hci_disable_l2cap_timeout_check(void){ 3372 disable_l2cap_timeouts = 1; 3373 } 3374 #endif 3375 3376 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3377 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3378 void hci_set_bd_addr(bd_addr_t addr){ 3379 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3380 hci_stack->custom_bd_addr_set = 1; 3381 } 3382 #endif 3383 3384 // State-Module-Driver overview 3385 // state module low-level 3386 // HCI_STATE_OFF off close 3387 // HCI_STATE_INITIALIZING, on open 3388 // HCI_STATE_WORKING, on open 3389 // HCI_STATE_HALTING, on open 3390 // HCI_STATE_SLEEPING, off/sleep close 3391 // HCI_STATE_FALLING_ASLEEP on open 3392 3393 static int hci_power_control_on(void){ 3394 3395 // power on 3396 int err = 0; 3397 if (hci_stack->control && hci_stack->control->on){ 3398 err = (*hci_stack->control->on)(); 3399 } 3400 if (err){ 3401 log_error( "POWER_ON failed"); 3402 hci_emit_hci_open_failed(); 3403 return err; 3404 } 3405 3406 // int chipset driver 3407 if (hci_stack->chipset && hci_stack->chipset->init){ 3408 hci_stack->chipset->init(hci_stack->config); 3409 } 3410 3411 // init transport 3412 if (hci_stack->hci_transport->init){ 3413 hci_stack->hci_transport->init(hci_stack->config); 3414 } 3415 3416 // open transport 3417 err = hci_stack->hci_transport->open(); 3418 if (err){ 3419 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3420 if (hci_stack->control && hci_stack->control->off){ 3421 (*hci_stack->control->off)(); 3422 } 3423 hci_emit_hci_open_failed(); 3424 return err; 3425 } 3426 return 0; 3427 } 3428 3429 static void hci_power_control_off(void){ 3430 3431 log_info("hci_power_control_off"); 3432 3433 // close low-level device 3434 hci_stack->hci_transport->close(); 3435 3436 log_info("hci_power_control_off - hci_transport closed"); 3437 3438 // power off 3439 if (hci_stack->control && hci_stack->control->off){ 3440 (*hci_stack->control->off)(); 3441 } 3442 3443 log_info("hci_power_control_off - control closed"); 3444 3445 hci_stack->state = HCI_STATE_OFF; 3446 } 3447 3448 static void hci_power_control_sleep(void){ 3449 3450 log_info("hci_power_control_sleep"); 3451 3452 #if 0 3453 // don't close serial port during sleep 3454 3455 // close low-level device 3456 hci_stack->hci_transport->close(hci_stack->config); 3457 #endif 3458 3459 // sleep mode 3460 if (hci_stack->control && hci_stack->control->sleep){ 3461 (*hci_stack->control->sleep)(); 3462 } 3463 3464 hci_stack->state = HCI_STATE_SLEEPING; 3465 } 3466 3467 static int hci_power_control_wake(void){ 3468 3469 log_info("hci_power_control_wake"); 3470 3471 // wake on 3472 if (hci_stack->control && hci_stack->control->wake){ 3473 (*hci_stack->control->wake)(); 3474 } 3475 3476 #if 0 3477 // open low-level device 3478 int err = hci_stack->hci_transport->open(hci_stack->config); 3479 if (err){ 3480 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3481 if (hci_stack->control && hci_stack->control->off){ 3482 (*hci_stack->control->off)(); 3483 } 3484 hci_emit_hci_open_failed(); 3485 return err; 3486 } 3487 #endif 3488 3489 return 0; 3490 } 3491 3492 static void hci_power_transition_to_initializing(void){ 3493 // set up state machine 3494 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3495 hci_stack->hci_packet_buffer_reserved = 0; 3496 hci_stack->state = HCI_STATE_INITIALIZING; 3497 hci_stack->substate = HCI_INIT_SEND_RESET; 3498 } 3499 3500 // returns error 3501 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3502 int err; 3503 switch (power_mode){ 3504 case HCI_POWER_ON: 3505 err = hci_power_control_on(); 3506 if (err != 0) { 3507 log_error("hci_power_control_on() error %d", err); 3508 return err; 3509 } 3510 hci_power_transition_to_initializing(); 3511 break; 3512 case HCI_POWER_OFF: 3513 // do nothing 3514 break; 3515 case HCI_POWER_SLEEP: 3516 // do nothing (with SLEEP == OFF) 3517 break; 3518 default: 3519 btstack_assert(false); 3520 break; 3521 } 3522 return ERROR_CODE_SUCCESS; 3523 } 3524 3525 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3526 switch (power_mode){ 3527 case HCI_POWER_ON: 3528 // do nothing 3529 break; 3530 case HCI_POWER_OFF: 3531 // no connections yet, just turn it off 3532 hci_power_control_off(); 3533 break; 3534 case HCI_POWER_SLEEP: 3535 // no connections yet, just turn it off 3536 hci_power_control_sleep(); 3537 break; 3538 default: 3539 btstack_assert(false); 3540 break; 3541 } 3542 return ERROR_CODE_SUCCESS; 3543 } 3544 3545 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3546 switch (power_mode){ 3547 case HCI_POWER_ON: 3548 // do nothing 3549 break; 3550 case HCI_POWER_OFF: 3551 // see hci_run 3552 hci_stack->state = HCI_STATE_HALTING; 3553 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3554 break; 3555 case HCI_POWER_SLEEP: 3556 // see hci_run 3557 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3558 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3559 break; 3560 default: 3561 btstack_assert(false); 3562 break; 3563 } 3564 return ERROR_CODE_SUCCESS; 3565 } 3566 3567 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3568 switch (power_mode){ 3569 case HCI_POWER_ON: 3570 hci_power_transition_to_initializing(); 3571 break; 3572 case HCI_POWER_OFF: 3573 // do nothing 3574 break; 3575 case HCI_POWER_SLEEP: 3576 // see hci_run 3577 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3578 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3579 break; 3580 default: 3581 btstack_assert(false); 3582 break; 3583 } 3584 return ERROR_CODE_SUCCESS; 3585 } 3586 3587 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3588 switch (power_mode){ 3589 case HCI_POWER_ON: 3590 3591 #ifdef HAVE_PLATFORM_IPHONE_OS 3592 // nothing to do, if H4 supports power management 3593 if (btstack_control_iphone_power_management_enabled()){ 3594 hci_stack->state = HCI_STATE_INITIALIZING; 3595 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3596 break; 3597 } 3598 #endif 3599 hci_power_transition_to_initializing(); 3600 break; 3601 case HCI_POWER_OFF: 3602 // see hci_run 3603 hci_stack->state = HCI_STATE_HALTING; 3604 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3605 break; 3606 case HCI_POWER_SLEEP: 3607 // do nothing 3608 break; 3609 default: 3610 btstack_assert(false); 3611 break; 3612 } 3613 return ERROR_CODE_SUCCESS; 3614 } 3615 3616 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3617 int err; 3618 switch (power_mode){ 3619 case HCI_POWER_ON: 3620 #ifdef HAVE_PLATFORM_IPHONE_OS 3621 // nothing to do, if H4 supports power management 3622 if (btstack_control_iphone_power_management_enabled()){ 3623 hci_stack->state = HCI_STATE_INITIALIZING; 3624 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3625 hci_update_scan_enable(); 3626 break; 3627 } 3628 #endif 3629 err = hci_power_control_wake(); 3630 if (err) return err; 3631 hci_power_transition_to_initializing(); 3632 break; 3633 case HCI_POWER_OFF: 3634 hci_stack->state = HCI_STATE_HALTING; 3635 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3636 break; 3637 case HCI_POWER_SLEEP: 3638 // do nothing 3639 break; 3640 default: 3641 btstack_assert(false); 3642 break; 3643 } 3644 return ERROR_CODE_SUCCESS; 3645 } 3646 3647 int hci_power_control(HCI_POWER_MODE power_mode){ 3648 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3649 int err = 0; 3650 switch (hci_stack->state){ 3651 case HCI_STATE_OFF: 3652 err = hci_power_control_state_off(power_mode); 3653 break; 3654 case HCI_STATE_INITIALIZING: 3655 err = hci_power_control_state_initializing(power_mode); 3656 break; 3657 case HCI_STATE_WORKING: 3658 err = hci_power_control_state_working(power_mode); 3659 break; 3660 case HCI_STATE_HALTING: 3661 err = hci_power_control_state_halting(power_mode); 3662 break; 3663 case HCI_STATE_FALLING_ASLEEP: 3664 err = hci_power_control_state_falling_asleep(power_mode); 3665 break; 3666 case HCI_STATE_SLEEPING: 3667 err = hci_power_control_state_sleeping(power_mode); 3668 break; 3669 default: 3670 btstack_assert(false); 3671 break; 3672 } 3673 if (err != 0){ 3674 return err; 3675 } 3676 3677 // create internal event 3678 hci_emit_state(); 3679 3680 // trigger next/first action 3681 hci_run(); 3682 3683 return 0; 3684 } 3685 3686 3687 #ifdef ENABLE_CLASSIC 3688 3689 static void hci_update_scan_enable(void){ 3690 // 2 = page scan, 1 = inq scan 3691 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3692 hci_run(); 3693 } 3694 3695 void gap_discoverable_control(uint8_t enable){ 3696 if (enable) enable = 1; // normalize argument 3697 3698 if (hci_stack->discoverable == enable){ 3699 hci_emit_discoverable_enabled(hci_stack->discoverable); 3700 return; 3701 } 3702 3703 hci_stack->discoverable = enable; 3704 hci_update_scan_enable(); 3705 } 3706 3707 void gap_connectable_control(uint8_t enable){ 3708 if (enable) enable = 1; // normalize argument 3709 3710 // don't emit event 3711 if (hci_stack->connectable == enable) return; 3712 3713 hci_stack->connectable = enable; 3714 hci_update_scan_enable(); 3715 } 3716 #endif 3717 3718 void gap_local_bd_addr(bd_addr_t address_buffer){ 3719 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3720 } 3721 3722 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3723 static void hci_host_num_completed_packets(void){ 3724 3725 // create packet manually as arrays are not supported and num_commands should not get reduced 3726 hci_reserve_packet_buffer(); 3727 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3728 3729 uint16_t size = 0; 3730 uint16_t num_handles = 0; 3731 packet[size++] = 0x35; 3732 packet[size++] = 0x0c; 3733 size++; // skip param len 3734 size++; // skip num handles 3735 3736 // add { handle, packets } entries 3737 btstack_linked_item_t * it; 3738 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3739 hci_connection_t * connection = (hci_connection_t *) it; 3740 if (connection->num_packets_completed){ 3741 little_endian_store_16(packet, size, connection->con_handle); 3742 size += 2; 3743 little_endian_store_16(packet, size, connection->num_packets_completed); 3744 size += 2; 3745 // 3746 num_handles++; 3747 connection->num_packets_completed = 0; 3748 } 3749 } 3750 3751 packet[2] = size - 3; 3752 packet[3] = num_handles; 3753 3754 hci_stack->host_completed_packets = 0; 3755 3756 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3757 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3758 3759 // release packet buffer for synchronous transport implementations 3760 if (hci_transport_synchronous()){ 3761 hci_release_packet_buffer(); 3762 hci_emit_transport_packet_sent(); 3763 } 3764 } 3765 #endif 3766 3767 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3768 UNUSED(ds); 3769 hci_stack->substate = HCI_HALTING_CLOSE; 3770 // allow packet handlers to defer final shutdown 3771 hci_emit_state(); 3772 hci_run(); 3773 } 3774 3775 static bool hci_run_acl_fragments(void){ 3776 if (hci_stack->acl_fragmentation_total_size > 0u) { 3777 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3778 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3779 if (connection) { 3780 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3781 hci_send_acl_packet_fragments(connection); 3782 return true; 3783 } 3784 } else { 3785 // connection gone -> discard further fragments 3786 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3787 hci_stack->acl_fragmentation_total_size = 0; 3788 hci_stack->acl_fragmentation_pos = 0; 3789 } 3790 } 3791 return false; 3792 } 3793 3794 #ifdef ENABLE_CLASSIC 3795 static bool hci_run_general_gap_classic(void){ 3796 3797 // decline incoming connections 3798 if (hci_stack->decline_reason){ 3799 uint8_t reason = hci_stack->decline_reason; 3800 hci_stack->decline_reason = 0; 3801 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3802 return true; 3803 } 3804 // write page scan activity 3805 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_interval != 0xffff) && hci_classic_supported()){ 3806 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 3807 hci_stack->new_page_scan_interval = 0xffff; 3808 hci_stack->new_page_scan_window = 0xffff; 3809 return true; 3810 } 3811 // write page scan type 3812 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_type != 0xff) && hci_classic_supported()){ 3813 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 3814 hci_stack->new_page_scan_type = 0xff; 3815 return true; 3816 } 3817 // send scan enable 3818 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3819 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3820 hci_stack->new_scan_enable_value = 0xff; 3821 return true; 3822 } 3823 // start/stop inquiry 3824 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3825 uint8_t duration = hci_stack->inquiry_state; 3826 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 3827 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3828 return true; 3829 } 3830 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3831 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3832 hci_send_cmd(&hci_inquiry_cancel); 3833 return true; 3834 } 3835 // remote name request 3836 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3837 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3838 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3839 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3840 return true; 3841 } 3842 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3843 // Local OOB data 3844 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 3845 hci_stack->classic_read_local_oob_data = false; 3846 if (hci_stack->local_supported_commands[1] & 0x10u){ 3847 hci_send_cmd(&hci_read_local_extended_oob_data); 3848 } else { 3849 hci_send_cmd(&hci_read_local_oob_data); 3850 } 3851 } 3852 #endif 3853 // pairing 3854 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3855 uint8_t state = hci_stack->gap_pairing_state; 3856 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3857 switch (state){ 3858 case GAP_PAIRING_STATE_SEND_PIN: 3859 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); 3860 break; 3861 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3862 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3863 break; 3864 case GAP_PAIRING_STATE_SEND_PASSKEY: 3865 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3866 break; 3867 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3868 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3869 break; 3870 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3871 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3872 break; 3873 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3874 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3875 break; 3876 default: 3877 break; 3878 } 3879 return true; 3880 } 3881 return false; 3882 } 3883 #endif 3884 3885 #ifdef ENABLE_BLE 3886 static bool hci_run_general_gap_le(void){ 3887 3888 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3889 3890 if (hci_stack->state != HCI_STATE_WORKING) return false; 3891 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3892 3893 3894 // Phase 1: collect what to stop 3895 3896 bool scanning_stop = false; 3897 bool connecting_stop = false; 3898 bool advertising_stop = false; 3899 3900 #ifndef ENABLE_LE_CENTRAL 3901 UNUSED(scanning_stop); 3902 UNUSED(connecting_stop); 3903 #endif 3904 #ifndef ENABLE_LE_PERIPHERAL 3905 UNUSED(advertising_stop); 3906 #endif 3907 3908 // check if whitelist needs modification 3909 bool whitelist_modification_pending = false; 3910 btstack_linked_list_iterator_t lit; 3911 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3912 while (btstack_linked_list_iterator_has_next(&lit)){ 3913 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3914 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3915 whitelist_modification_pending = true; 3916 break; 3917 } 3918 } 3919 // check if resolving list needs modification 3920 bool resolving_list_modification_pending = false; 3921 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3922 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 3923 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 3924 resolving_list_modification_pending = true; 3925 } 3926 #endif 3927 3928 #ifdef ENABLE_LE_CENTRAL 3929 // scanning control 3930 if (hci_stack->le_scanning_active) { 3931 // stop if: 3932 // - parameter change required 3933 // - it's disabled 3934 // - whitelist change required but used for scanning 3935 // - resolving list modified 3936 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 3937 if ((hci_stack->le_scanning_param_update) || 3938 !hci_stack->le_scanning_enabled || 3939 scanning_uses_whitelist || 3940 resolving_list_modification_pending){ 3941 3942 scanning_stop = true; 3943 } 3944 } 3945 #endif 3946 3947 #ifdef ENABLE_LE_CENTRAL 3948 // connecting control 3949 bool connecting_with_whitelist; 3950 switch (hci_stack->le_connecting_state){ 3951 case LE_CONNECTING_DIRECT: 3952 case LE_CONNECTING_WHITELIST: 3953 // stop connecting if: 3954 // - connecting uses white and whitelist modification pending 3955 // - if it got disabled 3956 // - resolving list modified 3957 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 3958 if ((connecting_with_whitelist && whitelist_modification_pending) || 3959 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 3960 resolving_list_modification_pending) { 3961 3962 connecting_stop = true; 3963 } 3964 break; 3965 default: 3966 break; 3967 } 3968 #endif 3969 3970 #ifdef ENABLE_LE_PERIPHERAL 3971 // le advertisement control 3972 if (hci_stack->le_advertisements_active){ 3973 // stop if: 3974 // - parameter change required 3975 // - it's disabled 3976 // - whitelist change required but used for advertisement filter policy 3977 // - resolving list modified 3978 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy > 0; 3979 if ((hci_stack->le_advertisements_todo != 0) || 3980 !hci_stack->le_advertisements_enabled_for_current_roles || 3981 (advertising_uses_whitelist & whitelist_modification_pending) || 3982 resolving_list_modification_pending) { 3983 3984 advertising_stop = true; 3985 } 3986 } 3987 #endif 3988 3989 3990 // Phase 2: stop everything that should be off during modifications 3991 3992 #ifdef ENABLE_LE_CENTRAL 3993 if (scanning_stop){ 3994 hci_stack->le_scanning_active = false; 3995 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3996 return true; 3997 } 3998 #endif 3999 4000 #ifdef ENABLE_LE_CENTRAL 4001 if (connecting_stop){ 4002 hci_send_cmd(&hci_le_create_connection_cancel); 4003 return true; 4004 } 4005 #endif 4006 4007 #ifdef ENABLE_LE_PERIPHERAL 4008 if (advertising_stop){ 4009 hci_stack->le_advertisements_active = false; 4010 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4011 return true; 4012 } 4013 #endif 4014 4015 // Phase 3: modify 4016 4017 #ifdef ENABLE_LE_CENTRAL 4018 if (hci_stack->le_scanning_param_update){ 4019 hci_stack->le_scanning_param_update = false; 4020 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4021 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4022 return true; 4023 } 4024 #endif 4025 4026 #ifdef ENABLE_LE_PERIPHERAL 4027 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4028 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4029 hci_send_cmd(&hci_le_set_advertising_parameters, 4030 hci_stack->le_advertisements_interval_min, 4031 hci_stack->le_advertisements_interval_max, 4032 hci_stack->le_advertisements_type, 4033 hci_stack->le_own_addr_type, 4034 hci_stack->le_advertisements_direct_address_type, 4035 hci_stack->le_advertisements_direct_address, 4036 hci_stack->le_advertisements_channel_map, 4037 hci_stack->le_advertisements_filter_policy); 4038 return true; 4039 } 4040 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4041 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4042 uint8_t adv_data_clean[31]; 4043 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4044 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4045 hci_stack->le_advertisements_data_len); 4046 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4047 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4048 return true; 4049 } 4050 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4051 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4052 uint8_t scan_data_clean[31]; 4053 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4054 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4055 hci_stack->le_scan_response_data_len); 4056 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4057 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4058 return true; 4059 } 4060 #endif 4061 4062 4063 #ifdef ENABLE_LE_CENTRAL 4064 // if connect with whitelist was active and is not cancelled yet, wait until next time 4065 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4066 #endif 4067 4068 // LE Whitelist Management 4069 if (whitelist_modification_pending){ 4070 // add/remove entries 4071 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4072 while (btstack_linked_list_iterator_has_next(&lit)){ 4073 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4074 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4075 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4076 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4077 return true; 4078 } 4079 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4080 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4081 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4082 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4083 return true; 4084 } 4085 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4086 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4087 btstack_memory_whitelist_entry_free(entry); 4088 } 4089 } 4090 } 4091 4092 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4093 // LE Resolving List Management 4094 if (resolving_list_supported) { 4095 uint16_t i; 4096 switch (hci_stack->le_resolving_list_state) { 4097 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4098 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4099 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4100 return true; 4101 case LE_RESOLVING_LIST_READ_SIZE: 4102 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4103 hci_send_cmd(&hci_le_read_resolving_list_size); 4104 return true; 4105 case LE_RESOLVING_LIST_SEND_CLEAR: 4106 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4107 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4108 sizeof(hci_stack->le_resolving_list_add_entries)); 4109 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4110 sizeof(hci_stack->le_resolving_list_remove_entries)); 4111 hci_send_cmd(&hci_le_clear_resolving_list); 4112 return true; 4113 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4114 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4115 uint8_t offset = i >> 3; 4116 uint8_t mask = 1 << (i & 7); 4117 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4118 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4119 bd_addr_t peer_identity_addreses; 4120 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4121 sm_key_t peer_irk; 4122 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4123 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4124 4125 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4126 // trigger whitelist entry 'update' (work around for controller bug) 4127 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4128 while (btstack_linked_list_iterator_has_next(&lit)) { 4129 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4130 if (entry->address_type != peer_identity_addr_type) continue; 4131 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4132 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4133 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4134 } 4135 #endif 4136 4137 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4138 peer_identity_addreses); 4139 return true; 4140 } 4141 4142 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4143 4144 /* fall through */ 4145 4146 case LE_RESOLVING_LIST_ADD_ENTRIES: 4147 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4148 uint8_t offset = i >> 3; 4149 uint8_t mask = 1 << (i & 7); 4150 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4151 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4152 bd_addr_t peer_identity_addreses; 4153 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4154 sm_key_t peer_irk; 4155 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4156 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4157 const uint8_t *local_irk = gap_get_persistent_irk(); 4158 // command uses format specifier 'P' that stores 16-byte value without flip 4159 uint8_t local_irk_flipped[16]; 4160 uint8_t peer_irk_flipped[16]; 4161 reverse_128(local_irk, local_irk_flipped); 4162 reverse_128(peer_irk, peer_irk_flipped); 4163 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4164 peer_irk_flipped, local_irk_flipped); 4165 return true; 4166 } 4167 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4168 break; 4169 4170 default: 4171 break; 4172 } 4173 } 4174 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4175 #endif 4176 4177 // Phase 4: restore state 4178 4179 #ifdef ENABLE_LE_CENTRAL 4180 // re-start scanning 4181 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4182 hci_stack->le_scanning_active = true; 4183 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4184 return true; 4185 } 4186 #endif 4187 4188 #ifdef ENABLE_LE_CENTRAL 4189 // re-start connecting 4190 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4191 bd_addr_t null_addr; 4192 memset(null_addr, 0, 6); 4193 hci_send_cmd(&hci_le_create_connection, 4194 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4195 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4196 1, // use whitelist 4197 0, // peer address type 4198 null_addr, // peer bd addr 4199 hci_stack->le_own_addr_type, // our addr type: 4200 hci_stack->le_connection_interval_min, // conn interval min 4201 hci_stack->le_connection_interval_max, // conn interval max 4202 hci_stack->le_connection_latency, // conn latency 4203 hci_stack->le_supervision_timeout, // conn latency 4204 hci_stack->le_minimum_ce_length, // min ce length 4205 hci_stack->le_maximum_ce_length // max ce length 4206 ); 4207 return true; 4208 } 4209 #endif 4210 4211 #ifdef ENABLE_LE_PERIPHERAL 4212 // re-start advertising 4213 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4214 // check if advertisements should be enabled given 4215 hci_stack->le_advertisements_active = true; 4216 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4217 return true; 4218 } 4219 #endif 4220 4221 return false; 4222 } 4223 #endif 4224 4225 static bool hci_run_general_pending_commands(void){ 4226 btstack_linked_item_t * it; 4227 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4228 hci_connection_t * connection = (hci_connection_t *) it; 4229 4230 switch(connection->state){ 4231 case SEND_CREATE_CONNECTION: 4232 switch(connection->address_type){ 4233 #ifdef ENABLE_CLASSIC 4234 case BD_ADDR_TYPE_ACL: 4235 log_info("sending hci_create_connection"); 4236 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4237 break; 4238 #endif 4239 default: 4240 #ifdef ENABLE_BLE 4241 #ifdef ENABLE_LE_CENTRAL 4242 log_info("sending hci_le_create_connection"); 4243 hci_send_cmd(&hci_le_create_connection, 4244 hci_stack->le_connection_scan_interval, // conn scan interval 4245 hci_stack->le_connection_scan_window, // conn scan windows 4246 0, // don't use whitelist 4247 connection->address_type, // peer address type 4248 connection->address, // peer bd addr 4249 hci_stack->le_own_addr_type, // our addr type: 4250 hci_stack->le_connection_interval_min, // conn interval min 4251 hci_stack->le_connection_interval_max, // conn interval max 4252 hci_stack->le_connection_latency, // conn latency 4253 hci_stack->le_supervision_timeout, // conn latency 4254 hci_stack->le_minimum_ce_length, // min ce length 4255 hci_stack->le_maximum_ce_length // max ce length 4256 ); 4257 connection->state = SENT_CREATE_CONNECTION; 4258 #endif 4259 #endif 4260 break; 4261 } 4262 return true; 4263 4264 #ifdef ENABLE_CLASSIC 4265 case RECEIVED_CONNECTION_REQUEST: 4266 connection->role = HCI_ROLE_SLAVE; 4267 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4268 log_info("sending hci_accept_connection_request"); 4269 connection->state = ACCEPTED_CONNECTION_REQUEST; 4270 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4271 } 4272 return true; 4273 #endif 4274 4275 #ifdef ENABLE_BLE 4276 #ifdef ENABLE_LE_CENTRAL 4277 case SEND_CANCEL_CONNECTION: 4278 connection->state = SENT_CANCEL_CONNECTION; 4279 hci_send_cmd(&hci_le_create_connection_cancel); 4280 return true; 4281 #endif 4282 #endif 4283 case SEND_DISCONNECT: 4284 connection->state = SENT_DISCONNECT; 4285 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4286 return true; 4287 4288 default: 4289 break; 4290 } 4291 4292 // no further commands if connection is about to get shut down 4293 if (connection->state == SENT_DISCONNECT) continue; 4294 4295 if (connection->authentication_flags & READ_RSSI){ 4296 connectionClearAuthenticationFlags(connection, READ_RSSI); 4297 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4298 return true; 4299 } 4300 4301 #ifdef ENABLE_CLASSIC 4302 4303 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4304 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4305 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4306 return true; 4307 } 4308 4309 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 4310 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4311 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4312 4313 link_key_t link_key; 4314 link_key_type_t link_key_type; 4315 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 4316 4317 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4318 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4319 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 4320 if (sc_downgrade){ 4321 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4322 connection->state = SENT_DISCONNECT; 4323 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4324 return true; 4325 } 4326 4327 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 4328 if (have_link_key && security_level_sufficient){ 4329 connection->link_key_type = link_key_type; 4330 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 4331 } else { 4332 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4333 } 4334 return true; 4335 } 4336 4337 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4338 log_info("denying to pin request"); 4339 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4340 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4341 return true; 4342 } 4343 4344 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4345 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4346 // set authentication requirements: 4347 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4348 // - BONDING MODE: Dedicated if requested, otherwise bondable flag 4349 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4350 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4351 authreq |= 1; 4352 } 4353 if (connection->bonding_flags & BONDING_DEDICATED){ 4354 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4355 } else if (hci_stack->bondable){ 4356 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4357 } 4358 uint8_t have_oob_data = 0; 4359 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4360 if (connection->classic_oob_c_192 != NULL){ 4361 have_oob_data |= 1; 4362 } 4363 if (connection->classic_oob_c_256 != NULL){ 4364 have_oob_data |= 2; 4365 } 4366 #endif 4367 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4368 return true; 4369 } 4370 4371 if (connection->authentication_flags & SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4372 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4373 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4374 return true; 4375 } 4376 4377 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4378 if (connection->authentication_flags & SEND_REMOTE_OOB_DATA_REPLY){ 4379 connectionClearAuthenticationFlags(connection, SEND_REMOTE_OOB_DATA_REPLY); 4380 const uint8_t zero[16] = { 0 }; 4381 const uint8_t * r_192 = zero; 4382 const uint8_t * c_192 = zero; 4383 const uint8_t * r_256 = zero; 4384 const uint8_t * c_256 = zero; 4385 // verify P-256 OOB 4386 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4387 c_256 = connection->classic_oob_c_256; 4388 if (connection->classic_oob_r_256 != NULL) { 4389 r_256 = connection->classic_oob_r_256; 4390 } 4391 } 4392 // verify P-192 OOB 4393 if ((connection->classic_oob_c_192 != NULL)) { 4394 c_192 = connection->classic_oob_c_192; 4395 if (connection->classic_oob_r_192 != NULL) { 4396 r_192 = connection->classic_oob_r_192; 4397 } 4398 } 4399 // Reply 4400 if (c_256 != zero) { 4401 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4402 } else if (c_192 != zero){ 4403 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4404 } else { 4405 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4406 } 4407 return true; 4408 } 4409 #endif 4410 4411 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4412 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4413 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4414 return true; 4415 } 4416 4417 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4418 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4419 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4420 return true; 4421 } 4422 4423 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4424 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4425 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4426 return true; 4427 } 4428 4429 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4430 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4431 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4432 return true; 4433 } 4434 4435 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4436 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4437 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4438 return true; 4439 } 4440 4441 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4442 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4443 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4444 connection->state = SENT_DISCONNECT; 4445 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4446 return true; 4447 } 4448 4449 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4450 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4451 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4452 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4453 return true; 4454 } 4455 4456 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4457 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4458 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4459 return true; 4460 } 4461 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4462 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4463 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4464 return true; 4465 } 4466 #endif 4467 4468 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4469 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4470 if (connection->state != SENT_DISCONNECT){ 4471 connection->state = SENT_DISCONNECT; 4472 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4473 return true; 4474 } 4475 } 4476 4477 #ifdef ENABLE_CLASSIC 4478 uint16_t sniff_min_interval; 4479 switch (connection->sniff_min_interval){ 4480 case 0: 4481 break; 4482 case 0xffff: 4483 connection->sniff_min_interval = 0; 4484 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4485 return true; 4486 default: 4487 sniff_min_interval = connection->sniff_min_interval; 4488 connection->sniff_min_interval = 0; 4489 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4490 return true; 4491 } 4492 4493 if (connection->request_role != HCI_ROLE_INVALID){ 4494 hci_role_t role = connection->request_role; 4495 connection->request_role = HCI_ROLE_INVALID; 4496 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4497 return true; 4498 } 4499 #endif 4500 4501 #ifdef ENABLE_BLE 4502 switch (connection->le_con_parameter_update_state){ 4503 // response to L2CAP CON PARAMETER UPDATE REQUEST 4504 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4505 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4506 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4507 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4508 0x0000, 0xffff); 4509 return true; 4510 case CON_PARAMETER_UPDATE_REPLY: 4511 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4512 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4513 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4514 0x0000, 0xffff); 4515 return true; 4516 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4517 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4518 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4519 return true; 4520 default: 4521 break; 4522 } 4523 if (connection->le_phy_update_all_phys != 0xffu){ 4524 uint8_t all_phys = connection->le_phy_update_all_phys; 4525 connection->le_phy_update_all_phys = 0xff; 4526 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); 4527 return true; 4528 } 4529 #endif 4530 } 4531 return false; 4532 } 4533 4534 static void hci_run(void){ 4535 4536 bool done; 4537 4538 // send continuation fragments first, as they block the prepared packet buffer 4539 done = hci_run_acl_fragments(); 4540 if (done) return; 4541 4542 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4543 // send host num completed packets next as they don't require num_cmd_packets > 0 4544 if (!hci_can_send_comand_packet_transport()) return; 4545 if (hci_stack->host_completed_packets){ 4546 hci_host_num_completed_packets(); 4547 return; 4548 } 4549 #endif 4550 4551 if (!hci_can_send_command_packet_now()) return; 4552 4553 // global/non-connection oriented commands 4554 4555 4556 #ifdef ENABLE_CLASSIC 4557 // general gap classic 4558 done = hci_run_general_gap_classic(); 4559 if (done) return; 4560 #endif 4561 4562 #ifdef ENABLE_BLE 4563 // general gap le 4564 done = hci_run_general_gap_le(); 4565 if (done) return; 4566 #endif 4567 4568 // send pending HCI commands 4569 done = hci_run_general_pending_commands(); 4570 if (done) return; 4571 4572 // stack state sub statemachines 4573 hci_connection_t * connection; 4574 switch (hci_stack->state){ 4575 case HCI_STATE_INITIALIZING: 4576 hci_initializing_run(); 4577 break; 4578 4579 case HCI_STATE_HALTING: 4580 4581 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4582 switch (hci_stack->substate){ 4583 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4584 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4585 4586 #ifdef ENABLE_BLE 4587 #ifdef ENABLE_LE_CENTRAL 4588 // free whitelist entries 4589 { 4590 btstack_linked_list_iterator_t lit; 4591 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4592 while (btstack_linked_list_iterator_has_next(&lit)){ 4593 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4594 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4595 btstack_memory_whitelist_entry_free(entry); 4596 } 4597 } 4598 #endif 4599 #endif 4600 // close all open connections 4601 connection = (hci_connection_t *) hci_stack->connections; 4602 if (connection){ 4603 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4604 if (!hci_can_send_command_packet_now()) return; 4605 4606 // check state 4607 if (connection->state == SENT_DISCONNECT) return; 4608 connection->state = SENT_DISCONNECT; 4609 4610 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4611 4612 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4613 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4614 4615 // ... which would be ignored anyway as we shutdown (free) the connection now 4616 hci_shutdown_connection(connection); 4617 4618 // finally, send the disconnect command 4619 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4620 return; 4621 } 4622 4623 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4624 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4625 log_info("HCI_STATE_HALTING: wait 50 ms"); 4626 hci_stack->substate = HCI_HALTING_W4_TIMER; 4627 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4628 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4629 btstack_run_loop_add_timer(&hci_stack->timeout); 4630 break; 4631 } 4632 4633 /* fall through */ 4634 4635 case HCI_HALTING_CLOSE: 4636 log_info("HCI_STATE_HALTING, calling off"); 4637 4638 // switch mode 4639 hci_power_control_off(); 4640 4641 log_info("HCI_STATE_HALTING, emitting state"); 4642 hci_emit_state(); 4643 log_info("HCI_STATE_HALTING, done"); 4644 break; 4645 4646 case HCI_HALTING_W4_TIMER: 4647 // keep waiting 4648 4649 break; 4650 default: 4651 break; 4652 } 4653 4654 break; 4655 4656 case HCI_STATE_FALLING_ASLEEP: 4657 switch(hci_stack->substate) { 4658 case HCI_FALLING_ASLEEP_DISCONNECT: 4659 log_info("HCI_STATE_FALLING_ASLEEP"); 4660 // close all open connections 4661 connection = (hci_connection_t *) hci_stack->connections; 4662 4663 #ifdef HAVE_PLATFORM_IPHONE_OS 4664 // don't close connections, if H4 supports power management 4665 if (btstack_control_iphone_power_management_enabled()){ 4666 connection = NULL; 4667 } 4668 #endif 4669 if (connection){ 4670 4671 // send disconnect 4672 if (!hci_can_send_command_packet_now()) return; 4673 4674 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4675 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4676 4677 // send disconnected event right away - causes higher layer connections to get closed, too. 4678 hci_shutdown_connection(connection); 4679 return; 4680 } 4681 4682 if (hci_classic_supported()){ 4683 // disable page and inquiry scan 4684 if (!hci_can_send_command_packet_now()) return; 4685 4686 log_info("HCI_STATE_HALTING, disabling inq scans"); 4687 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4688 4689 // continue in next sub state 4690 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4691 break; 4692 } 4693 4694 /* fall through */ 4695 4696 case HCI_FALLING_ASLEEP_COMPLETE: 4697 log_info("HCI_STATE_HALTING, calling sleep"); 4698 #ifdef HAVE_PLATFORM_IPHONE_OS 4699 // don't actually go to sleep, if H4 supports power management 4700 if (btstack_control_iphone_power_management_enabled()){ 4701 // SLEEP MODE reached 4702 hci_stack->state = HCI_STATE_SLEEPING; 4703 hci_emit_state(); 4704 break; 4705 } 4706 #endif 4707 // switch mode 4708 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4709 hci_emit_state(); 4710 break; 4711 4712 default: 4713 break; 4714 } 4715 break; 4716 4717 default: 4718 break; 4719 } 4720 } 4721 4722 int hci_send_cmd_packet(uint8_t *packet, int size){ 4723 // house-keeping 4724 4725 #ifdef ENABLE_CLASSIC 4726 bd_addr_t addr; 4727 hci_connection_t * conn; 4728 #endif 4729 #ifdef ENABLE_LE_CENTRAL 4730 uint8_t initiator_filter_policy; 4731 #endif 4732 4733 uint16_t opcode = little_endian_read_16(packet, 0); 4734 switch (opcode) { 4735 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4736 hci_stack->loopback_mode = packet[3]; 4737 break; 4738 4739 #ifdef ENABLE_CLASSIC 4740 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4741 reverse_bd_addr(&packet[3], addr); 4742 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4743 4744 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4745 if (!conn) { 4746 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4747 if (!conn) { 4748 // notify client that alloc failed 4749 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4750 return -1; // packet not sent to controller 4751 } 4752 conn->state = SEND_CREATE_CONNECTION; 4753 conn->role = HCI_ROLE_MASTER; 4754 } 4755 log_info("conn state %u", conn->state); 4756 switch (conn->state) { 4757 // if connection active exists 4758 case OPEN: 4759 // and OPEN, emit connection complete command 4760 hci_emit_connection_complete(addr, conn->con_handle, 0); 4761 return -1; // packet not sent to controller 4762 case RECEIVED_DISCONNECTION_COMPLETE: 4763 // create connection triggered in disconnect complete event, let's do it now 4764 break; 4765 case SEND_CREATE_CONNECTION: 4766 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4767 break; 4768 default: 4769 // otherwise, just ignore as it is already in the open process 4770 return -1; // packet not sent to controller 4771 } 4772 conn->state = SENT_CREATE_CONNECTION; 4773 4774 // track outgoing connection 4775 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4776 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4777 break; 4778 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4779 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4780 break; 4781 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4782 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4783 break; 4784 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4785 if (hci_stack->link_key_db) { 4786 reverse_bd_addr(&packet[3], addr); 4787 hci_stack->link_key_db->delete_link_key(addr); 4788 } 4789 break; 4790 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4791 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4792 reverse_bd_addr(&packet[3], addr); 4793 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4794 if (conn) { 4795 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4796 } 4797 break; 4798 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4799 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4800 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4801 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4802 reverse_bd_addr(&packet[3], addr); 4803 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4804 if (conn) { 4805 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4806 } 4807 break; 4808 4809 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 4810 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4811 // setup_synchronous_connection? Voice setting at offset 22 4812 // TODO: compare to current setting if sco connection already active 4813 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4814 break; 4815 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4816 // accept_synchronus_connection? Voice setting at offset 18 4817 // TODO: compare to current setting if sco connection already active 4818 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4819 break; 4820 #endif 4821 #endif 4822 4823 #ifdef ENABLE_BLE 4824 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4825 hci_stack->le_random_address_set = 1; 4826 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4827 break; 4828 #ifdef ENABLE_LE_PERIPHERAL 4829 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4830 hci_stack->le_advertisements_active = packet[3] != 0; 4831 break; 4832 #endif 4833 #ifdef ENABLE_LE_CENTRAL 4834 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4835 // white list used? 4836 initiator_filter_policy = packet[7]; 4837 switch (initiator_filter_policy) { 4838 case 0: 4839 // whitelist not used 4840 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4841 break; 4842 case 1: 4843 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4844 break; 4845 default: 4846 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4847 break; 4848 } 4849 // track outgoing connection 4850 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 4851 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 4852 break; 4853 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4854 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 4855 break; 4856 #endif 4857 #endif 4858 default: 4859 break; 4860 } 4861 4862 hci_stack->num_cmd_packets--; 4863 4864 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4865 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4866 } 4867 4868 // disconnect because of security block 4869 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4870 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4871 if (!connection) return; 4872 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4873 } 4874 4875 4876 // Configure Secure Simple Pairing 4877 4878 #ifdef ENABLE_CLASSIC 4879 4880 // enable will enable SSP during init 4881 void gap_ssp_set_enable(int enable){ 4882 hci_stack->ssp_enable = enable; 4883 } 4884 4885 static int hci_local_ssp_activated(void){ 4886 return gap_ssp_supported() && hci_stack->ssp_enable; 4887 } 4888 4889 // if set, BTstack will respond to io capability request using authentication requirement 4890 void gap_ssp_set_io_capability(int io_capability){ 4891 hci_stack->ssp_io_capability = io_capability; 4892 } 4893 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4894 hci_stack->ssp_authentication_requirement = authentication_requirement; 4895 } 4896 4897 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4898 void gap_ssp_set_auto_accept(int auto_accept){ 4899 hci_stack->ssp_auto_accept = auto_accept; 4900 } 4901 4902 void gap_secure_connections_enable(bool enable){ 4903 hci_stack->secure_connections_enable = enable; 4904 } 4905 4906 #endif 4907 4908 // va_list part of hci_send_cmd 4909 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4910 if (!hci_can_send_command_packet_now()){ 4911 log_error("hci_send_cmd called but cannot send packet now"); 4912 return 0; 4913 } 4914 4915 // for HCI INITIALIZATION 4916 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4917 hci_stack->last_cmd_opcode = cmd->opcode; 4918 4919 hci_reserve_packet_buffer(); 4920 uint8_t * packet = hci_stack->hci_packet_buffer; 4921 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4922 int err = hci_send_cmd_packet(packet, size); 4923 4924 // release packet buffer on error or for synchronous transport implementations 4925 if ((err < 0) || hci_transport_synchronous()){ 4926 hci_release_packet_buffer(); 4927 hci_emit_transport_packet_sent(); 4928 } 4929 4930 return err; 4931 } 4932 4933 /** 4934 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4935 */ 4936 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4937 va_list argptr; 4938 va_start(argptr, cmd); 4939 int res = hci_send_cmd_va_arg(cmd, argptr); 4940 va_end(argptr); 4941 return res; 4942 } 4943 4944 // Create various non-HCI events. 4945 // TODO: generalize, use table similar to hci_create_command 4946 4947 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4948 // dump packet 4949 if (dump) { 4950 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4951 } 4952 4953 // dispatch to all event handlers 4954 btstack_linked_list_iterator_t it; 4955 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4956 while (btstack_linked_list_iterator_has_next(&it)){ 4957 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4958 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4959 } 4960 } 4961 4962 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4963 if (!hci_stack->acl_packet_handler) return; 4964 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4965 } 4966 4967 #ifdef ENABLE_CLASSIC 4968 static void hci_notify_if_sco_can_send_now(void){ 4969 // notify SCO sender if waiting 4970 if (!hci_stack->sco_waiting_for_can_send_now) return; 4971 if (hci_can_send_sco_packet_now()){ 4972 hci_stack->sco_waiting_for_can_send_now = 0; 4973 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4974 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4975 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4976 } 4977 } 4978 4979 // parsing end emitting has been merged to reduce code size 4980 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4981 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4982 4983 uint8_t * eir_data; 4984 ad_context_t context; 4985 const uint8_t * name; 4986 uint8_t name_len; 4987 4988 if (size < 3) return; 4989 4990 int event_type = hci_event_packet_get_type(packet); 4991 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4992 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4993 4994 switch (event_type){ 4995 case HCI_EVENT_INQUIRY_RESULT: 4996 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4997 if (size != (3 + (num_responses * 14))) return; 4998 break; 4999 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5000 if (size != 257) return; 5001 if (num_responses != 1) return; 5002 break; 5003 default: 5004 return; 5005 } 5006 5007 // event[1] is set at the end 5008 int i; 5009 for (i=0; i<num_responses;i++){ 5010 memset(event, 0, sizeof(event)); 5011 event[0] = GAP_EVENT_INQUIRY_RESULT; 5012 uint8_t event_size = 18; // if name is not set by EIR 5013 5014 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5015 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5016 (void)memcpy(&event[9], 5017 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5018 3); // class of device 5019 (void)memcpy(&event[12], 5020 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5021 2); // clock offset 5022 5023 switch (event_type){ 5024 case HCI_EVENT_INQUIRY_RESULT: 5025 // 14,15,16,17 = 0, size 18 5026 break; 5027 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5028 event[14] = 1; 5029 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5030 // 16,17 = 0, size 18 5031 break; 5032 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5033 event[14] = 1; 5034 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5035 // EIR packets only contain a single inquiry response 5036 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5037 name = NULL; 5038 // Iterate over EIR data 5039 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5040 uint8_t data_type = ad_iterator_get_data_type(&context); 5041 uint8_t data_size = ad_iterator_get_data_len(&context); 5042 const uint8_t * data = ad_iterator_get_data(&context); 5043 // Prefer Complete Local Name over Shortend Local Name 5044 switch (data_type){ 5045 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5046 if (name) continue; 5047 /* fall through */ 5048 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5049 name = data; 5050 name_len = data_size; 5051 break; 5052 default: 5053 break; 5054 } 5055 } 5056 if (name){ 5057 event[16] = 1; 5058 // truncate name if needed 5059 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5060 event[17] = len; 5061 (void)memcpy(&event[18], name, len); 5062 event_size += len; 5063 } 5064 break; 5065 default: 5066 return; 5067 } 5068 event[1] = event_size - 2; 5069 hci_emit_event(event, event_size, 1); 5070 } 5071 } 5072 #endif 5073 5074 void hci_emit_state(void){ 5075 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5076 uint8_t event[3]; 5077 event[0] = BTSTACK_EVENT_STATE; 5078 event[1] = sizeof(event) - 2u; 5079 event[2] = hci_stack->state; 5080 hci_emit_event(event, sizeof(event), 1); 5081 } 5082 5083 #ifdef ENABLE_CLASSIC 5084 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5085 uint8_t event[13]; 5086 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5087 event[1] = sizeof(event) - 2; 5088 event[2] = status; 5089 little_endian_store_16(event, 3, con_handle); 5090 reverse_bd_addr(address, &event[5]); 5091 event[11] = 1; // ACL connection 5092 event[12] = 0; // encryption disabled 5093 hci_emit_event(event, sizeof(event), 1); 5094 } 5095 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5096 if (disable_l2cap_timeouts) return; 5097 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5098 uint8_t event[4]; 5099 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5100 event[1] = sizeof(event) - 2; 5101 little_endian_store_16(event, 2, conn->con_handle); 5102 hci_emit_event(event, sizeof(event), 1); 5103 } 5104 #endif 5105 5106 #ifdef ENABLE_BLE 5107 #ifdef ENABLE_LE_CENTRAL 5108 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){ 5109 uint8_t event[21]; 5110 event[0] = HCI_EVENT_LE_META; 5111 event[1] = sizeof(event) - 2u; 5112 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5113 event[3] = status; 5114 little_endian_store_16(event, 4, con_handle); 5115 event[6] = 0; // TODO: role 5116 event[7] = address_type; 5117 reverse_bd_addr(address, &event[8]); 5118 little_endian_store_16(event, 14, 0); // interval 5119 little_endian_store_16(event, 16, 0); // latency 5120 little_endian_store_16(event, 18, 0); // supervision timeout 5121 event[20] = 0; // master clock accuracy 5122 hci_emit_event(event, sizeof(event), 1); 5123 } 5124 #endif 5125 #endif 5126 5127 static void hci_emit_transport_packet_sent(void){ 5128 // notify upper stack that it might be possible to send again 5129 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5130 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5131 } 5132 5133 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5134 uint8_t event[6]; 5135 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5136 event[1] = sizeof(event) - 2u; 5137 event[2] = 0; // status = OK 5138 little_endian_store_16(event, 3, con_handle); 5139 event[5] = reason; 5140 hci_emit_event(event, sizeof(event), 1); 5141 } 5142 5143 static void hci_emit_nr_connections_changed(void){ 5144 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5145 uint8_t event[3]; 5146 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5147 event[1] = sizeof(event) - 2u; 5148 event[2] = nr_hci_connections(); 5149 hci_emit_event(event, sizeof(event), 1); 5150 } 5151 5152 static void hci_emit_hci_open_failed(void){ 5153 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5154 uint8_t event[2]; 5155 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5156 event[1] = sizeof(event) - 2u; 5157 hci_emit_event(event, sizeof(event), 1); 5158 } 5159 5160 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5161 log_info("hci_emit_dedicated_bonding_result %u ", status); 5162 uint8_t event[9]; 5163 int pos = 0; 5164 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5165 event[pos++] = sizeof(event) - 2u; 5166 event[pos++] = status; 5167 reverse_bd_addr(address, &event[pos]); 5168 hci_emit_event(event, sizeof(event), 1); 5169 } 5170 5171 5172 #ifdef ENABLE_CLASSIC 5173 5174 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5175 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5176 uint8_t event[5]; 5177 int pos = 0; 5178 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5179 event[pos++] = sizeof(event) - 2; 5180 little_endian_store_16(event, 2, con_handle); 5181 pos += 2; 5182 event[pos++] = level; 5183 hci_emit_event(event, sizeof(event), 1); 5184 } 5185 5186 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5187 if (!connection) return LEVEL_0; 5188 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5189 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5190 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5191 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5192 // LEVEL 4 always requires 128 bit encrytion key size 5193 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5194 security_level = LEVEL_3; 5195 } 5196 return security_level; 5197 } 5198 5199 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5200 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5201 uint8_t event[3]; 5202 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5203 event[1] = sizeof(event) - 2; 5204 event[2] = enabled; 5205 hci_emit_event(event, sizeof(event), 1); 5206 } 5207 5208 // query if remote side supports eSCO 5209 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5210 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5211 if (!connection) return 0; 5212 return (connection->remote_supported_features[0] & 1) != 0; 5213 } 5214 5215 static bool hci_ssp_supported(hci_connection_t * connection){ 5216 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5217 return (connection->bonding_flags & mask) == mask; 5218 } 5219 5220 // query if remote side supports SSP 5221 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5222 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5223 if (!connection) return 0; 5224 return hci_ssp_supported(connection) ? 1 : 0; 5225 } 5226 5227 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5228 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5229 } 5230 5231 // GAP API 5232 /** 5233 * @bbrief enable/disable bonding. default is enabled 5234 * @praram enabled 5235 */ 5236 void gap_set_bondable_mode(int enable){ 5237 hci_stack->bondable = enable ? 1 : 0; 5238 } 5239 /** 5240 * @brief Get bondable mode. 5241 * @return 1 if bondable 5242 */ 5243 int gap_get_bondable_mode(void){ 5244 return hci_stack->bondable; 5245 } 5246 5247 /** 5248 * @brief map link keys to security levels 5249 */ 5250 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5251 switch (link_key_type){ 5252 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5253 return LEVEL_4; 5254 case COMBINATION_KEY: 5255 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5256 return LEVEL_3; 5257 default: 5258 return LEVEL_2; 5259 } 5260 } 5261 5262 /** 5263 * @brief map link keys to secure connection yes/no 5264 */ 5265 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5266 switch (link_key_type){ 5267 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5268 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5269 return 1; 5270 default: 5271 return 0; 5272 } 5273 } 5274 5275 /** 5276 * @brief map link keys to authenticated 5277 */ 5278 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5279 switch (link_key_type){ 5280 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5281 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5282 return 1; 5283 default: 5284 return 0; 5285 } 5286 } 5287 5288 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5289 log_info("gap_mitm_protection_required_for_security_level %u", level); 5290 return level > LEVEL_2; 5291 } 5292 5293 /** 5294 * @brief get current security level 5295 */ 5296 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5297 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5298 if (!connection) return LEVEL_0; 5299 return gap_security_level_for_connection(connection); 5300 } 5301 5302 /** 5303 * @brief request connection to device to 5304 * @result GAP_AUTHENTICATION_RESULT 5305 */ 5306 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5307 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5308 if (!connection){ 5309 hci_emit_security_level(con_handle, LEVEL_0); 5310 return; 5311 } 5312 5313 btstack_assert(hci_is_le_connection(connection) == false); 5314 5315 gap_security_level_t current_level = gap_security_level(con_handle); 5316 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5317 requested_level, connection->requested_security_level, current_level); 5318 5319 // assumption: earlier requested security higher than current level => security request is active 5320 if (current_level < connection->requested_security_level){ 5321 if (connection->requested_security_level < requested_level){ 5322 // increase requested level as new level is higher 5323 5324 // TODO: handle re-authentication when done 5325 5326 connection->requested_security_level = requested_level; 5327 } 5328 return; 5329 } 5330 5331 // no request active, notify if security sufficient 5332 if (requested_level <= current_level){ 5333 hci_emit_security_level(con_handle, current_level); 5334 return; 5335 } 5336 5337 // store request 5338 connection->requested_security_level = requested_level; 5339 5340 // start to authenticate connection if authentication not already active 5341 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 5342 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5343 hci_run(); 5344 } 5345 5346 /** 5347 * @brief start dedicated bonding with device. disconnect after bonding 5348 * @param device 5349 * @param request MITM protection 5350 * @result GAP_DEDICATED_BONDING_COMPLETE 5351 */ 5352 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5353 5354 // create connection state machine 5355 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5356 5357 if (!connection){ 5358 return BTSTACK_MEMORY_ALLOC_FAILED; 5359 } 5360 5361 // delete linkn key 5362 gap_drop_link_key_for_bd_addr(device); 5363 5364 // configure LEVEL_2/3, dedicated bonding 5365 connection->state = SEND_CREATE_CONNECTION; 5366 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5367 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5368 connection->bonding_flags = BONDING_DEDICATED; 5369 5370 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5371 5372 // handle: connnection failure (connection complete != ok) 5373 // handle: authentication failure 5374 // handle: disconnect on done 5375 5376 hci_run(); 5377 5378 return 0; 5379 } 5380 #endif 5381 5382 void gap_set_local_name(const char * local_name){ 5383 hci_stack->local_name = local_name; 5384 } 5385 5386 5387 #ifdef ENABLE_BLE 5388 5389 #ifdef ENABLE_LE_CENTRAL 5390 void gap_start_scan(void){ 5391 hci_stack->le_scanning_enabled = true; 5392 hci_run(); 5393 } 5394 5395 void gap_stop_scan(void){ 5396 hci_stack->le_scanning_enabled = false; 5397 hci_run(); 5398 } 5399 5400 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5401 hci_stack->le_scan_type = scan_type; 5402 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5403 hci_stack->le_scan_interval = scan_interval; 5404 hci_stack->le_scan_window = scan_window; 5405 hci_stack->le_scanning_param_update = true; 5406 hci_run(); 5407 } 5408 5409 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5410 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5411 } 5412 5413 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5414 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5415 if (!conn){ 5416 // disallow if le connection is already outgoing 5417 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5418 log_error("le connection already active"); 5419 return ERROR_CODE_COMMAND_DISALLOWED; 5420 } 5421 5422 log_info("gap_connect: no connection exists yet, creating context"); 5423 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5424 if (!conn){ 5425 // notify client that alloc failed 5426 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5427 log_info("gap_connect: failed to alloc hci_connection_t"); 5428 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5429 } 5430 5431 // set le connecting state 5432 if (hci_is_le_connection_type(addr_type)){ 5433 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5434 } 5435 5436 conn->state = SEND_CREATE_CONNECTION; 5437 log_info("gap_connect: send create connection next"); 5438 hci_run(); 5439 return ERROR_CODE_SUCCESS; 5440 } 5441 5442 if (!hci_is_le_connection(conn) || 5443 (conn->state == SEND_CREATE_CONNECTION) || 5444 (conn->state == SENT_CREATE_CONNECTION)) { 5445 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5446 log_error("gap_connect: classic connection or connect is already being created"); 5447 return GATT_CLIENT_IN_WRONG_STATE; 5448 } 5449 5450 // check if connection was just disconnected 5451 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5452 log_info("gap_connect: send create connection (again)"); 5453 conn->state = SEND_CREATE_CONNECTION; 5454 hci_run(); 5455 return ERROR_CODE_SUCCESS; 5456 } 5457 5458 log_info("gap_connect: context exists with state %u", conn->state); 5459 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5460 hci_run(); 5461 return ERROR_CODE_SUCCESS; 5462 } 5463 5464 // @assumption: only a single outgoing LE Connection exists 5465 static hci_connection_t * gap_get_outgoing_connection(void){ 5466 btstack_linked_item_t *it; 5467 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5468 hci_connection_t * conn = (hci_connection_t *) it; 5469 if (!hci_is_le_connection(conn)) continue; 5470 switch (conn->state){ 5471 case SEND_CREATE_CONNECTION: 5472 case SENT_CREATE_CONNECTION: 5473 case SENT_CANCEL_CONNECTION: 5474 return conn; 5475 default: 5476 break; 5477 }; 5478 } 5479 return NULL; 5480 } 5481 5482 uint8_t gap_connect_cancel(void){ 5483 hci_connection_t * conn = gap_get_outgoing_connection(); 5484 if (!conn) return 0; 5485 switch (conn->state){ 5486 case SEND_CREATE_CONNECTION: 5487 // skip sending create connection and emit event instead 5488 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5489 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5490 btstack_memory_hci_connection_free( conn ); 5491 break; 5492 case SENT_CREATE_CONNECTION: 5493 // request to send cancel connection 5494 conn->state = SEND_CANCEL_CONNECTION; 5495 hci_run(); 5496 break; 5497 default: 5498 break; 5499 } 5500 return 0; 5501 } 5502 #endif 5503 5504 #ifdef ENABLE_LE_CENTRAL 5505 /** 5506 * @brief Set connection parameters for outgoing connections 5507 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5508 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5509 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5510 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5511 * @param conn_latency, default: 4 5512 * @param supervision_timeout (unit: 10ms), default: 720 ms 5513 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5514 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5515 */ 5516 5517 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5518 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5519 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5520 hci_stack->le_connection_scan_interval = conn_scan_interval; 5521 hci_stack->le_connection_scan_window = conn_scan_window; 5522 hci_stack->le_connection_interval_min = conn_interval_min; 5523 hci_stack->le_connection_interval_max = conn_interval_max; 5524 hci_stack->le_connection_latency = conn_latency; 5525 hci_stack->le_supervision_timeout = supervision_timeout; 5526 hci_stack->le_minimum_ce_length = min_ce_length; 5527 hci_stack->le_maximum_ce_length = max_ce_length; 5528 } 5529 #endif 5530 5531 /** 5532 * @brief Updates the connection parameters for a given LE connection 5533 * @param handle 5534 * @param conn_interval_min (unit: 1.25ms) 5535 * @param conn_interval_max (unit: 1.25ms) 5536 * @param conn_latency 5537 * @param supervision_timeout (unit: 10ms) 5538 * @returns 0 if ok 5539 */ 5540 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5541 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5542 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5543 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5544 connection->le_conn_interval_min = conn_interval_min; 5545 connection->le_conn_interval_max = conn_interval_max; 5546 connection->le_conn_latency = conn_latency; 5547 connection->le_supervision_timeout = supervision_timeout; 5548 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5549 hci_run(); 5550 return 0; 5551 } 5552 5553 /** 5554 * @brief Request an update of the connection parameter for a given LE connection 5555 * @param handle 5556 * @param conn_interval_min (unit: 1.25ms) 5557 * @param conn_interval_max (unit: 1.25ms) 5558 * @param conn_latency 5559 * @param supervision_timeout (unit: 10ms) 5560 * @returns 0 if ok 5561 */ 5562 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5563 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5564 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5565 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5566 connection->le_conn_interval_min = conn_interval_min; 5567 connection->le_conn_interval_max = conn_interval_max; 5568 connection->le_conn_latency = conn_latency; 5569 connection->le_supervision_timeout = supervision_timeout; 5570 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5571 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5572 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5573 return 0; 5574 } 5575 5576 #ifdef ENABLE_LE_PERIPHERAL 5577 5578 /** 5579 * @brief Set Advertisement Data 5580 * @param advertising_data_length 5581 * @param advertising_data (max 31 octets) 5582 * @note data is not copied, pointer has to stay valid 5583 */ 5584 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5585 hci_stack->le_advertisements_data_len = advertising_data_length; 5586 hci_stack->le_advertisements_data = advertising_data; 5587 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5588 hci_run(); 5589 } 5590 5591 /** 5592 * @brief Set Scan Response Data 5593 * @param advertising_data_length 5594 * @param advertising_data (max 31 octets) 5595 * @note data is not copied, pointer has to stay valid 5596 */ 5597 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5598 hci_stack->le_scan_response_data_len = scan_response_data_length; 5599 hci_stack->le_scan_response_data = scan_response_data; 5600 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5601 hci_run(); 5602 } 5603 5604 /** 5605 * @brief Set Advertisement Parameters 5606 * @param adv_int_min 5607 * @param adv_int_max 5608 * @param adv_type 5609 * @param direct_address_type 5610 * @param direct_address 5611 * @param channel_map 5612 * @param filter_policy 5613 * 5614 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5615 */ 5616 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5617 uint8_t direct_address_typ, bd_addr_t direct_address, 5618 uint8_t channel_map, uint8_t filter_policy) { 5619 5620 hci_stack->le_advertisements_interval_min = adv_int_min; 5621 hci_stack->le_advertisements_interval_max = adv_int_max; 5622 hci_stack->le_advertisements_type = adv_type; 5623 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5624 hci_stack->le_advertisements_channel_map = channel_map; 5625 hci_stack->le_advertisements_filter_policy = filter_policy; 5626 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5627 6); 5628 5629 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5630 hci_run(); 5631 } 5632 5633 /** 5634 * @brief Enable/Disable Advertisements 5635 * @param enabled 5636 */ 5637 void gap_advertisements_enable(int enabled){ 5638 hci_stack->le_advertisements_enabled = enabled != 0; 5639 hci_update_advertisements_enabled_for_current_roles(); 5640 hci_run(); 5641 } 5642 5643 #endif 5644 5645 void hci_le_set_own_address_type(uint8_t own_address_type){ 5646 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5647 if (own_address_type == hci_stack->le_own_addr_type) return; 5648 hci_stack->le_own_addr_type = own_address_type; 5649 5650 #ifdef ENABLE_LE_PERIPHERAL 5651 // update advertisement parameters, too 5652 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5653 hci_run(); 5654 #endif 5655 #ifdef ENABLE_LE_CENTRAL 5656 // note: we don't update scan parameters or modify ongoing connection attempts 5657 #endif 5658 } 5659 5660 #endif 5661 5662 uint8_t gap_disconnect(hci_con_handle_t handle){ 5663 hci_connection_t * conn = hci_connection_for_handle(handle); 5664 if (!conn){ 5665 hci_emit_disconnection_complete(handle, 0); 5666 return 0; 5667 } 5668 // ignore if already disconnected 5669 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5670 return 0; 5671 } 5672 conn->state = SEND_DISCONNECT; 5673 hci_run(); 5674 return 0; 5675 } 5676 5677 int gap_read_rssi(hci_con_handle_t con_handle){ 5678 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5679 if (hci_connection == NULL) return 0; 5680 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5681 hci_run(); 5682 return 1; 5683 } 5684 5685 /** 5686 * @brief Get connection type 5687 * @param con_handle 5688 * @result connection_type 5689 */ 5690 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5691 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5692 if (!conn) return GAP_CONNECTION_INVALID; 5693 switch (conn->address_type){ 5694 case BD_ADDR_TYPE_LE_PUBLIC: 5695 case BD_ADDR_TYPE_LE_RANDOM: 5696 return GAP_CONNECTION_LE; 5697 case BD_ADDR_TYPE_SCO: 5698 return GAP_CONNECTION_SCO; 5699 case BD_ADDR_TYPE_ACL: 5700 return GAP_CONNECTION_ACL; 5701 default: 5702 return GAP_CONNECTION_INVALID; 5703 } 5704 } 5705 5706 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5707 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5708 if (!conn) return HCI_ROLE_INVALID; 5709 return (hci_role_t) conn->role; 5710 } 5711 5712 5713 #ifdef ENABLE_CLASSIC 5714 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5715 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5716 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5717 conn->request_role = role; 5718 hci_run(); 5719 return ERROR_CODE_SUCCESS; 5720 } 5721 #endif 5722 5723 #ifdef ENABLE_BLE 5724 5725 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){ 5726 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5727 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5728 5729 conn->le_phy_update_all_phys = all_phys; 5730 conn->le_phy_update_tx_phys = tx_phys; 5731 conn->le_phy_update_rx_phys = rx_phys; 5732 conn->le_phy_update_phy_options = phy_options; 5733 5734 hci_run(); 5735 5736 return 0; 5737 } 5738 5739 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5740 // check if already in list 5741 btstack_linked_list_iterator_t it; 5742 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5743 while (btstack_linked_list_iterator_has_next(&it)) { 5744 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5745 if (entry->address_type != address_type) { 5746 continue; 5747 } 5748 if (memcmp(entry->address, address, 6) != 0) { 5749 continue; 5750 } 5751 // disallow if already scheduled to add 5752 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5753 return ERROR_CODE_COMMAND_DISALLOWED; 5754 } 5755 // still on controller, but scheduled to remove -> re-add 5756 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5757 return ERROR_CODE_SUCCESS; 5758 } 5759 // alloc and add to list 5760 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5761 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5762 entry->address_type = address_type; 5763 (void)memcpy(entry->address, address, 6); 5764 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5765 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5766 return ERROR_CODE_SUCCESS; 5767 } 5768 5769 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5770 btstack_linked_list_iterator_t it; 5771 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5772 while (btstack_linked_list_iterator_has_next(&it)){ 5773 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5774 if (entry->address_type != address_type) { 5775 continue; 5776 } 5777 if (memcmp(entry->address, address, 6) != 0) { 5778 continue; 5779 } 5780 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5781 // remove from controller if already present 5782 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5783 } else { 5784 // directly remove entry from whitelist 5785 btstack_linked_list_iterator_remove(&it); 5786 btstack_memory_whitelist_entry_free(entry); 5787 } 5788 return ERROR_CODE_SUCCESS; 5789 } 5790 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5791 } 5792 5793 static void hci_whitelist_clear(void){ 5794 btstack_linked_list_iterator_t it; 5795 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5796 while (btstack_linked_list_iterator_has_next(&it)){ 5797 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5798 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5799 // remove from controller if already present 5800 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5801 continue; 5802 } 5803 // directly remove entry from whitelist 5804 btstack_linked_list_iterator_remove(&it); 5805 btstack_memory_whitelist_entry_free(entry); 5806 } 5807 } 5808 5809 /** 5810 * @brief Clear Whitelist 5811 * @returns 0 if ok 5812 */ 5813 uint8_t gap_whitelist_clear(void){ 5814 hci_whitelist_clear(); 5815 hci_run(); 5816 return ERROR_CODE_SUCCESS; 5817 } 5818 5819 /** 5820 * @brief Add Device to Whitelist 5821 * @param address_typ 5822 * @param address 5823 * @returns 0 if ok 5824 */ 5825 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5826 uint8_t status = hci_whitelist_add(address_type, address); 5827 if (status){ 5828 return status; 5829 } 5830 hci_run(); 5831 return ERROR_CODE_SUCCESS; 5832 } 5833 5834 /** 5835 * @brief Remove Device from Whitelist 5836 * @param address_typ 5837 * @param address 5838 * @returns 0 if ok 5839 */ 5840 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5841 uint8_t status = hci_whitelist_remove(address_type, address); 5842 if (status){ 5843 return status; 5844 } 5845 hci_run(); 5846 return ERROR_CODE_SUCCESS; 5847 } 5848 5849 #ifdef ENABLE_LE_CENTRAL 5850 /** 5851 * @brief Connect with Whitelist 5852 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 5853 * @returns - if ok 5854 */ 5855 uint8_t gap_connect_with_whitelist(void){ 5856 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5857 return ERROR_CODE_COMMAND_DISALLOWED; 5858 } 5859 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5860 hci_run(); 5861 return ERROR_CODE_SUCCESS; 5862 } 5863 5864 /** 5865 * @brief Auto Connection Establishment - Start Connecting to device 5866 * @param address_typ 5867 * @param address 5868 * @returns 0 if ok 5869 */ 5870 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 5871 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5872 return ERROR_CODE_COMMAND_DISALLOWED; 5873 } 5874 5875 uint8_t status = hci_whitelist_add(address_type, address); 5876 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 5877 return status; 5878 } 5879 5880 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5881 5882 hci_run(); 5883 return ERROR_CODE_SUCCESS; 5884 } 5885 5886 /** 5887 * @brief Auto Connection Establishment - Stop Connecting to device 5888 * @param address_typ 5889 * @param address 5890 * @returns 0 if ok 5891 */ 5892 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 5893 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5894 return ERROR_CODE_COMMAND_DISALLOWED; 5895 } 5896 5897 hci_whitelist_remove(address_type, address); 5898 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 5899 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5900 } 5901 hci_run(); 5902 return 0; 5903 } 5904 5905 /** 5906 * @brief Auto Connection Establishment - Stop everything 5907 * @note Convenience function to stop all active auto connection attempts 5908 */ 5909 uint8_t gap_auto_connection_stop_all(void){ 5910 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 5911 return ERROR_CODE_COMMAND_DISALLOWED; 5912 } 5913 hci_whitelist_clear(); 5914 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5915 hci_run(); 5916 return ERROR_CODE_SUCCESS; 5917 } 5918 5919 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5920 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5921 if (!conn) return 0; 5922 return conn->le_connection_interval; 5923 } 5924 #endif 5925 #endif 5926 5927 #ifdef ENABLE_CLASSIC 5928 /** 5929 * @brief Set Extended Inquiry Response data 5930 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5931 * @note has to be done before stack starts up 5932 */ 5933 void gap_set_extended_inquiry_response(const uint8_t * data){ 5934 hci_stack->eir_data = data; 5935 } 5936 5937 /** 5938 * @brief Start GAP Classic Inquiry 5939 * @param duration in 1.28s units 5940 * @return 0 if ok 5941 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5942 */ 5943 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5944 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5945 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5946 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5947 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5948 } 5949 hci_stack->inquiry_state = duration_in_1280ms_units; 5950 hci_run(); 5951 return 0; 5952 } 5953 5954 /** 5955 * @brief Stop GAP Classic Inquiry 5956 * @returns 0 if ok 5957 */ 5958 int gap_inquiry_stop(void){ 5959 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5960 // emit inquiry complete event, before it even started 5961 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5962 hci_emit_event(event, sizeof(event), 1); 5963 return 0; 5964 } 5965 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5966 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5967 hci_run(); 5968 return 0; 5969 } 5970 5971 5972 /** 5973 * @brief Remote Name Request 5974 * @param addr 5975 * @param page_scan_repetition_mode 5976 * @param clock_offset only used when bit 15 is set 5977 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5978 */ 5979 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5980 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5981 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5982 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5983 hci_stack->remote_name_clock_offset = clock_offset; 5984 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5985 hci_run(); 5986 return 0; 5987 } 5988 5989 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 5990 hci_stack->gap_pairing_state = state; 5991 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5992 hci_run(); 5993 return 0; 5994 } 5995 5996 /** 5997 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 5998 * @param addr 5999 * @param pin_data 6000 * @param pin_len 6001 * @return 0 if ok 6002 */ 6003 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6004 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6005 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6006 hci_stack->gap_pairing_pin_len = pin_len; 6007 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6008 } 6009 6010 /** 6011 * @brief Legacy Pairing Pin Code Response 6012 * @param addr 6013 * @param pin 6014 * @return 0 if ok 6015 */ 6016 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6017 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6018 } 6019 6020 /** 6021 * @brief Abort Legacy Pairing 6022 * @param addr 6023 * @param pin 6024 * @return 0 if ok 6025 */ 6026 int gap_pin_code_negative(bd_addr_t addr){ 6027 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6028 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6029 } 6030 6031 /** 6032 * @brief SSP Passkey Response 6033 * @param addr 6034 * @param passkey 6035 * @return 0 if ok 6036 */ 6037 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6038 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6039 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6040 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6041 } 6042 6043 /** 6044 * @brief Abort SSP Passkey Entry/Pairing 6045 * @param addr 6046 * @param pin 6047 * @return 0 if ok 6048 */ 6049 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6050 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6051 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6052 } 6053 6054 /** 6055 * @brief Accept SSP Numeric Comparison 6056 * @param addr 6057 * @param passkey 6058 * @return 0 if ok 6059 */ 6060 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6061 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6062 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6063 } 6064 6065 /** 6066 * @brief Abort SSP Numeric Comparison/Pairing 6067 * @param addr 6068 * @param pin 6069 * @return 0 if ok 6070 */ 6071 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6072 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6073 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6074 } 6075 6076 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6077 6078 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6079 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6080 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6081 connectionSetAuthenticationFlags(conn, flag); 6082 hci_run(); 6083 return ERROR_CODE_SUCCESS; 6084 } 6085 6086 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6087 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_REPLY); 6088 } 6089 6090 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6091 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6092 } 6093 #endif 6094 6095 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6096 /** 6097 * @brief Report Remote OOB Data 6098 * @param bd_addr 6099 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6100 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6101 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6102 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6103 */ 6104 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){ 6105 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6106 if (connection == NULL) { 6107 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6108 } 6109 connection->classic_oob_c_192 = c_192; 6110 connection->classic_oob_r_192 = r_192; 6111 connection->classic_oob_c_256 = c_256; 6112 connection->classic_oob_r_256 = r_256; 6113 return ERROR_CODE_SUCCESS; 6114 } 6115 /** 6116 * @brief Generate new OOB data 6117 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6118 */ 6119 void gap_ssp_generate_oob_data(void){ 6120 hci_stack->classic_read_local_oob_data = true; 6121 hci_run(); 6122 } 6123 6124 #endif 6125 6126 /** 6127 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6128 * @param inquiry_mode see bluetooth_defines.h 6129 */ 6130 void hci_set_inquiry_mode(inquiry_mode_t mode){ 6131 hci_stack->inquiry_mode = mode; 6132 } 6133 6134 /** 6135 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6136 */ 6137 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6138 hci_stack->sco_voice_setting = voice_setting; 6139 } 6140 6141 /** 6142 * @brief Get SCO Voice Setting 6143 * @return current voice setting 6144 */ 6145 uint16_t hci_get_sco_voice_setting(void){ 6146 return hci_stack->sco_voice_setting; 6147 } 6148 6149 static int hci_have_usb_transport(void){ 6150 if (!hci_stack->hci_transport) return 0; 6151 const char * transport_name = hci_stack->hci_transport->name; 6152 if (!transport_name) return 0; 6153 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6154 } 6155 6156 /** @brief Get SCO packet length for current SCO Voice setting 6157 * @note Using SCO packets of the exact length is required for USB transfer 6158 * @return Length of SCO packets in bytes (not audio frames) 6159 */ 6160 int hci_get_sco_packet_length(void){ 6161 int sco_packet_length = 0; 6162 6163 #ifdef ENABLE_SCO_OVER_HCI 6164 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6165 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6166 6167 if (hci_have_usb_transport()){ 6168 // see Core Spec for H2 USB Transfer. 6169 // 3 byte SCO header + 24 bytes per connection 6170 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6171 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6172 } else { 6173 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6174 sco_packet_length = 3 + 60 * multiplier; 6175 // assert that it still fits inside an SCO buffer 6176 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6177 sco_packet_length = 3 + 60; 6178 } 6179 } 6180 #endif 6181 6182 #ifdef HAVE_SCO_TRANSPORT 6183 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6184 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6185 sco_packet_length = 3 + 60 * multiplier; 6186 #endif 6187 return sco_packet_length; 6188 } 6189 6190 /** 6191 * @brief Sets the master/slave policy 6192 * @param policy (0: attempt to become master, 1: let connecting device decide) 6193 */ 6194 void hci_set_master_slave_policy(uint8_t policy){ 6195 hci_stack->master_slave_policy = policy; 6196 } 6197 6198 #endif 6199 6200 HCI_STATE hci_get_state(void){ 6201 return hci_stack->state; 6202 } 6203 6204 #ifdef ENABLE_CLASSIC 6205 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6206 hci_stack->gap_classic_accept_callback = accept_callback; 6207 } 6208 #endif 6209 6210 /** 6211 * @brief Set callback for Bluetooth Hardware Error 6212 */ 6213 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6214 hci_stack->hardware_error_callback = fn; 6215 } 6216 6217 void hci_disconnect_all(void){ 6218 btstack_linked_list_iterator_t it; 6219 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6220 while (btstack_linked_list_iterator_has_next(&it)){ 6221 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6222 if (con->state == SENT_DISCONNECT) continue; 6223 con->state = SEND_DISCONNECT; 6224 } 6225 hci_run(); 6226 } 6227 6228 uint16_t hci_get_manufacturer(void){ 6229 return hci_stack->manufacturer; 6230 } 6231 6232 #ifdef ENABLE_BLE 6233 6234 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6235 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6236 if (!hci_con) return NULL; 6237 return &hci_con->sm_connection; 6238 } 6239 6240 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6241 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6242 6243 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6244 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6245 if (hci_connection == NULL) return 0; 6246 if (hci_is_le_connection(hci_connection)){ 6247 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6248 if (sm_conn->sm_connection_encrypted) { 6249 return sm_conn->sm_actual_encryption_key_size; 6250 } 6251 } 6252 #ifdef ENABLE_CLASSIC 6253 else { 6254 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 6255 return hci_connection->encryption_key_size; 6256 } 6257 } 6258 #endif 6259 return 0; 6260 } 6261 6262 int gap_authenticated(hci_con_handle_t con_handle){ 6263 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6264 if (hci_connection == NULL) return 0; 6265 6266 switch (hci_connection->address_type){ 6267 case BD_ADDR_TYPE_LE_PUBLIC: 6268 case BD_ADDR_TYPE_LE_RANDOM: 6269 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6270 return hci_connection->sm_connection.sm_connection_authenticated; 6271 #ifdef ENABLE_CLASSIC 6272 case BD_ADDR_TYPE_SCO: 6273 case BD_ADDR_TYPE_ACL: 6274 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6275 #endif 6276 default: 6277 return 0; 6278 } 6279 } 6280 6281 int gap_secure_connection(hci_con_handle_t con_handle){ 6282 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6283 if (hci_connection == NULL) return 0; 6284 6285 switch (hci_connection->address_type){ 6286 case BD_ADDR_TYPE_LE_PUBLIC: 6287 case BD_ADDR_TYPE_LE_RANDOM: 6288 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6289 return hci_connection->sm_connection.sm_connection_sc; 6290 #ifdef ENABLE_CLASSIC 6291 case BD_ADDR_TYPE_SCO: 6292 case BD_ADDR_TYPE_ACL: 6293 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6294 #endif 6295 default: 6296 return 0; 6297 } 6298 } 6299 6300 bool gap_bonded(hci_con_handle_t con_handle){ 6301 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6302 if (hci_connection == NULL) return 0; 6303 6304 #ifdef ENABLE_CLASSIC 6305 link_key_t link_key; 6306 link_key_type_t link_key_type; 6307 #endif 6308 switch (hci_connection->address_type){ 6309 case BD_ADDR_TYPE_LE_PUBLIC: 6310 case BD_ADDR_TYPE_LE_RANDOM: 6311 return hci_connection->sm_connection.sm_le_db_index >= 0; 6312 #ifdef ENABLE_CLASSIC 6313 case BD_ADDR_TYPE_SCO: 6314 case BD_ADDR_TYPE_ACL: 6315 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6316 #endif 6317 default: 6318 return false; 6319 } 6320 } 6321 6322 6323 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6324 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6325 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6326 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6327 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6328 return sm_conn->sm_connection_authorization_state; 6329 } 6330 #endif 6331 6332 #ifdef ENABLE_CLASSIC 6333 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){ 6334 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6335 if (!conn) return GAP_CONNECTION_INVALID; 6336 conn->sniff_min_interval = sniff_min_interval; 6337 conn->sniff_max_interval = sniff_max_interval; 6338 conn->sniff_attempt = sniff_attempt; 6339 conn->sniff_timeout = sniff_timeout; 6340 hci_run(); 6341 return 0; 6342 } 6343 6344 /** 6345 * @brief Exit Sniff mode 6346 * @param con_handle 6347 @ @return 0 if ok 6348 */ 6349 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6350 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6351 if (!conn) return GAP_CONNECTION_INVALID; 6352 conn->sniff_min_interval = 0xffff; 6353 hci_run(); 6354 return 0; 6355 } 6356 6357 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6358 hci_stack->new_page_scan_interval = page_scan_interval; 6359 hci_stack->new_page_scan_window = page_scan_window; 6360 hci_run(); 6361 } 6362 6363 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6364 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6365 hci_run(); 6366 } 6367 6368 #endif 6369 6370 void hci_halting_defer(void){ 6371 if (hci_stack->state != HCI_STATE_HALTING) return; 6372 switch (hci_stack->substate){ 6373 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6374 case HCI_HALTING_CLOSE: 6375 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6376 break; 6377 default: 6378 break; 6379 } 6380 } 6381 6382 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6383 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6384 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6385 if (le_device_db_index >= le_device_db_max_count()) return; 6386 uint8_t offset = le_device_db_index >> 3; 6387 uint8_t mask = 1 << (le_device_db_index & 7); 6388 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6389 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6390 // note: go back to remove entries, otherwise, a remove + add will skip the add 6391 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6392 } 6393 } 6394 6395 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6396 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6397 if (le_device_db_index >= le_device_db_max_count()) return; 6398 uint8_t offset = le_device_db_index >> 3; 6399 uint8_t mask = 1 << (le_device_db_index & 7); 6400 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6401 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6402 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6403 } 6404 } 6405 6406 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6407 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6408 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6409 } 6410 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6411 // restart le resolving list update 6412 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6413 } 6414 return ERROR_CODE_SUCCESS; 6415 } 6416 #endif 6417 6418 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6419 void hci_setup_test_connections_fuzz(void){ 6420 hci_connection_t * conn; 6421 6422 // default address: 66:55:44:33:00:01 6423 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6424 6425 // setup Controller info 6426 hci_stack->num_cmd_packets = 255; 6427 hci_stack->acl_packets_total_num = 255; 6428 6429 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6430 addr[5] = 0x01; 6431 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6432 conn->con_handle = addr[5]; 6433 conn->role = HCI_ROLE_SLAVE; 6434 conn->state = RECEIVED_CONNECTION_REQUEST; 6435 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6436 6437 // setup incoming Classic SCO connection with con handle 0x0002 6438 addr[5] = 0x02; 6439 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6440 conn->con_handle = addr[5]; 6441 conn->role = HCI_ROLE_SLAVE; 6442 conn->state = RECEIVED_CONNECTION_REQUEST; 6443 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6444 6445 // setup ready Classic ACL connection with con handle 0x0003 6446 addr[5] = 0x03; 6447 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6448 conn->con_handle = addr[5]; 6449 conn->role = HCI_ROLE_SLAVE; 6450 conn->state = OPEN; 6451 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6452 6453 // setup ready Classic SCO connection with con handle 0x0004 6454 addr[5] = 0x04; 6455 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6456 conn->con_handle = addr[5]; 6457 conn->role = HCI_ROLE_SLAVE; 6458 conn->state = OPEN; 6459 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6460 6461 // setup ready LE ACL connection with con handle 0x005 and public address 6462 addr[5] = 0x05; 6463 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6464 conn->con_handle = addr[5]; 6465 conn->role = HCI_ROLE_SLAVE; 6466 conn->state = OPEN; 6467 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6468 conn->sm_connection.sm_connection_encrypted = 1; 6469 } 6470 6471 void hci_free_connections_fuzz(void){ 6472 btstack_linked_list_iterator_t it; 6473 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6474 while (btstack_linked_list_iterator_has_next(&it)){ 6475 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6476 btstack_linked_list_iterator_remove(&it); 6477 btstack_memory_hci_connection_free(con); 6478 } 6479 } 6480 void hci_simulate_working_fuzz(void){ 6481 hci_init_done(); 6482 hci_stack->num_cmd_packets = 255; 6483 } 6484 #endif 6485