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