1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #include "ble/le_device_db.h" 63 #endif 64 65 #include <stdarg.h> 66 #include <string.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 98 #endif 99 100 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 101 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 102 #endif 103 104 #define HCI_CONNECTION_TIMEOUT_MS 10000 105 106 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 107 #define HCI_RESET_RESEND_TIMEOUT_MS 200 108 #endif 109 110 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 111 #ifndef GAP_INQUIRY_MAX_NAME_LEN 112 #define GAP_INQUIRY_MAX_NAME_LEN 32 113 #endif 114 115 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 116 #define GAP_INQUIRY_DURATION_MIN 0x01 117 #define GAP_INQUIRY_DURATION_MAX 0x30 118 #define GAP_INQUIRY_STATE_IDLE 0x00 119 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 120 #define GAP_INQUIRY_STATE_ACTIVE 0x81 121 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 122 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 123 124 // GAP Remote Name Request 125 #define GAP_REMOTE_NAME_STATE_IDLE 0 126 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 127 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 128 129 // GAP Pairing 130 #define GAP_PAIRING_STATE_IDLE 0 131 #define GAP_PAIRING_STATE_SEND_PIN 1 132 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 133 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 134 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 135 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 136 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 137 138 139 // prototypes 140 #ifdef ENABLE_CLASSIC 141 static void hci_update_scan_enable(void); 142 static void hci_emit_discoverable_enabled(uint8_t enabled); 143 static int hci_local_ssp_activated(void); 144 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 145 static bool hci_ssp_supported(hci_connection_t * connection); 146 static void hci_notify_if_sco_can_send_now(void); 147 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 148 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 149 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 150 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 151 static void hci_connection_timestamp(hci_connection_t *connection); 152 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 153 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 154 #endif 155 156 static int hci_power_control_on(void); 157 static void hci_power_control_off(void); 158 static void hci_state_reset(void); 159 static void hci_emit_transport_packet_sent(void); 160 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 161 static void hci_emit_nr_connections_changed(void); 162 static void hci_emit_hci_open_failed(void); 163 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 164 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 165 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 166 static void hci_run(void); 167 static int hci_is_le_connection(hci_connection_t * connection); 168 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 169 170 #ifdef ENABLE_CLASSIC 171 static int hci_have_usb_transport(void); 172 #endif 173 174 #ifdef ENABLE_BLE 175 #ifdef ENABLE_LE_CENTRAL 176 // called from test/ble_client/advertising_data_parser.c 177 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 178 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 179 static hci_connection_t * gap_get_outgoing_connection(void); 180 #endif 181 #endif 182 183 // the STACK is here 184 #ifndef HAVE_MALLOC 185 static hci_stack_t hci_stack_static; 186 #endif 187 static hci_stack_t * hci_stack = NULL; 188 189 #ifdef ENABLE_CLASSIC 190 // default name 191 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 192 193 // test helper 194 static uint8_t disable_l2cap_timeouts = 0; 195 #endif 196 197 /** 198 * create connection for given address 199 * 200 * @return connection OR NULL, if no memory left 201 */ 202 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 203 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 204 hci_connection_t * conn = btstack_memory_hci_connection_get(); 205 if (!conn) return NULL; 206 bd_addr_copy(conn->address, addr); 207 conn->role = HCI_ROLE_INVALID; 208 conn->address_type = addr_type; 209 conn->con_handle = 0xffff; 210 conn->authentication_flags = AUTH_FLAGS_NONE; 211 conn->bonding_flags = 0; 212 conn->requested_security_level = LEVEL_0; 213 #ifdef ENABLE_CLASSIC 214 conn->request_role = HCI_ROLE_INVALID; 215 conn->sniff_subrating_max_latency = 0xffff; 216 conn->qos_service_type = HCI_SERVICE_TyPE_INVALID; 217 conn->link_key_type = INVALID_LINK_KEY; 218 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 219 btstack_run_loop_set_timer_context(&conn->timeout, conn); 220 hci_connection_timestamp(conn); 221 #endif 222 conn->acl_recombination_length = 0; 223 conn->acl_recombination_pos = 0; 224 conn->num_packets_sent = 0; 225 226 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 227 #ifdef ENABLE_BLE 228 conn->le_phy_update_all_phys = 0xff; 229 #endif 230 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 231 conn->le_max_tx_octets = 27; 232 #endif 233 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 234 return conn; 235 } 236 237 238 /** 239 * get le connection parameter range 240 * 241 * @return le connection parameter range struct 242 */ 243 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 244 *range = hci_stack->le_connection_parameter_range; 245 } 246 247 /** 248 * set le connection parameter range 249 * 250 */ 251 252 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 253 hci_stack->le_connection_parameter_range = *range; 254 } 255 256 /** 257 * @brief Test if connection parameters are inside in existing rage 258 * @param conn_interval_min (unit: 1.25ms) 259 * @param conn_interval_max (unit: 1.25ms) 260 * @param conn_latency 261 * @param supervision_timeout (unit: 10ms) 262 * @returns 1 if included 263 */ 264 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){ 265 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 266 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 267 268 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 269 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 270 271 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 272 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 273 274 return 1; 275 } 276 277 /** 278 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 279 * @note: default: 1 280 * @param max_peripheral_connections 281 */ 282 #ifdef ENABLE_LE_PERIPHERAL 283 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 284 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 285 } 286 #endif 287 288 /** 289 * get hci connections iterator 290 * 291 * @return hci connections iterator 292 */ 293 294 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 295 btstack_linked_list_iterator_init(it, &hci_stack->connections); 296 } 297 298 /** 299 * get connection for a given handle 300 * 301 * @return connection OR NULL, if not found 302 */ 303 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 304 btstack_linked_list_iterator_t it; 305 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 306 while (btstack_linked_list_iterator_has_next(&it)){ 307 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 308 if ( item->con_handle == con_handle ) { 309 return item; 310 } 311 } 312 return NULL; 313 } 314 315 /** 316 * get connection for given address 317 * 318 * @return connection OR NULL, if not found 319 */ 320 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 321 btstack_linked_list_iterator_t it; 322 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 323 while (btstack_linked_list_iterator_has_next(&it)){ 324 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 325 if (connection->address_type != addr_type) continue; 326 if (memcmp(addr, connection->address, 6) != 0) continue; 327 return connection; 328 } 329 return NULL; 330 } 331 332 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 333 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 334 } 335 336 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 337 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 338 } 339 340 #ifdef ENABLE_CLASSIC 341 342 #ifdef ENABLE_SCO_OVER_HCI 343 static int hci_number_sco_connections(void){ 344 int connections = 0; 345 btstack_linked_list_iterator_t it; 346 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 347 while (btstack_linked_list_iterator_has_next(&it)){ 348 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 349 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 350 connections++; 351 } 352 return connections; 353 } 354 #endif 355 356 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 357 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 358 #ifdef HAVE_EMBEDDED_TICK 359 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 360 // connections might be timed out 361 hci_emit_l2cap_check_timeout(connection); 362 } 363 #else 364 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 365 // connections might be timed out 366 hci_emit_l2cap_check_timeout(connection); 367 } 368 #endif 369 } 370 371 static void hci_connection_timestamp(hci_connection_t *connection){ 372 #ifdef HAVE_EMBEDDED_TICK 373 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 374 #else 375 connection->timestamp = btstack_run_loop_get_time_ms(); 376 #endif 377 } 378 379 /** 380 * add authentication flags and reset timer 381 * @note: assumes classic connection 382 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 383 */ 384 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 385 bd_addr_t addr; 386 reverse_bd_addr(bd_addr, addr); 387 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 388 if (conn) { 389 connectionSetAuthenticationFlags(conn, flags); 390 hci_connection_timestamp(conn); 391 } 392 } 393 394 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 395 hci_connection_t * conn = hci_connection_for_handle(handle); 396 if (!conn) return 0; 397 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 398 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 399 return 0; 400 } 401 402 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 403 if (!hci_stack->link_key_db) return; 404 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 405 hci_stack->link_key_db->delete_link_key(addr); 406 } 407 408 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 409 if (!hci_stack->link_key_db) return; 410 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 411 hci_stack->link_key_db->put_link_key(addr, link_key, type); 412 } 413 414 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 415 if (!hci_stack->link_key_db) return false; 416 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 417 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 418 return result; 419 } 420 421 void gap_delete_all_link_keys(void){ 422 bd_addr_t addr; 423 link_key_t link_key; 424 link_key_type_t type; 425 btstack_link_key_iterator_t it; 426 int ok = gap_link_key_iterator_init(&it); 427 if (!ok) { 428 log_error("could not initialize iterator"); 429 return; 430 } 431 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 432 gap_drop_link_key_for_bd_addr(addr); 433 } 434 gap_link_key_iterator_done(&it); 435 } 436 437 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 438 if (!hci_stack->link_key_db) return 0; 439 if (!hci_stack->link_key_db->iterator_init) return 0; 440 return hci_stack->link_key_db->iterator_init(it); 441 } 442 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){ 443 if (!hci_stack->link_key_db) return 0; 444 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 445 } 446 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 447 if (!hci_stack->link_key_db) return; 448 hci_stack->link_key_db->iterator_done(it); 449 } 450 #endif 451 452 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 453 switch (address_type){ 454 case BD_ADDR_TYPE_LE_PUBLIC: 455 case BD_ADDR_TYPE_LE_RANDOM: 456 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 457 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 458 return true; 459 default: 460 return false; 461 } 462 } 463 464 static int hci_is_le_connection(hci_connection_t * connection){ 465 return hci_is_le_connection_type(connection->address_type); 466 } 467 468 /** 469 * count connections 470 */ 471 static int nr_hci_connections(void){ 472 int count = 0; 473 btstack_linked_item_t *it; 474 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 475 count++; 476 } 477 return count; 478 } 479 480 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 481 482 unsigned int num_packets_sent_classic = 0; 483 unsigned int num_packets_sent_le = 0; 484 485 btstack_linked_item_t *it; 486 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 487 hci_connection_t * connection = (hci_connection_t *) it; 488 if (hci_is_le_connection(connection)){ 489 num_packets_sent_le += connection->num_packets_sent; 490 } 491 if (connection->address_type == BD_ADDR_TYPE_ACL){ 492 num_packets_sent_classic += connection->num_packets_sent; 493 } 494 } 495 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 496 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 497 int free_slots_le = 0; 498 499 if (free_slots_classic < 0){ 500 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); 501 return 0; 502 } 503 504 if (hci_stack->le_acl_packets_total_num){ 505 // if we have LE slots, they are used 506 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 507 if (free_slots_le < 0){ 508 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); 509 return 0; 510 } 511 } else { 512 // otherwise, classic slots are used for LE, too 513 free_slots_classic -= num_packets_sent_le; 514 if (free_slots_classic < 0){ 515 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); 516 return 0; 517 } 518 } 519 520 switch (address_type){ 521 case BD_ADDR_TYPE_UNKNOWN: 522 log_error("hci_number_free_acl_slots: unknown address type"); 523 return 0; 524 525 case BD_ADDR_TYPE_ACL: 526 return free_slots_classic; 527 528 default: 529 if (hci_stack->le_acl_packets_total_num){ 530 return free_slots_le; 531 } 532 return free_slots_classic; 533 } 534 } 535 536 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 537 // get connection type 538 hci_connection_t * connection = hci_connection_for_handle(con_handle); 539 if (!connection){ 540 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 541 return 0; 542 } 543 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 544 } 545 546 #ifdef ENABLE_CLASSIC 547 static int hci_number_free_sco_slots(void){ 548 unsigned int num_sco_packets_sent = 0; 549 btstack_linked_item_t *it; 550 if (hci_stack->synchronous_flow_control_enabled){ 551 // explicit flow control 552 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 553 hci_connection_t * connection = (hci_connection_t *) it; 554 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 555 num_sco_packets_sent += connection->num_packets_sent; 556 } 557 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 558 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 559 return 0; 560 } 561 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 562 } else { 563 // implicit flow control -- TODO 564 int num_ready = 0; 565 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 566 hci_connection_t * connection = (hci_connection_t *) it; 567 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 568 if (connection->sco_tx_ready == 0) continue; 569 num_ready++; 570 } 571 return num_ready; 572 } 573 } 574 #endif 575 576 // only used to send HCI Host Number Completed Packets 577 static int hci_can_send_comand_packet_transport(void){ 578 if (hci_stack->hci_packet_buffer_reserved) return 0; 579 580 // check for async hci transport implementations 581 if (hci_stack->hci_transport->can_send_packet_now){ 582 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 583 return 0; 584 } 585 } 586 return 1; 587 } 588 589 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 590 int hci_can_send_command_packet_now(void){ 591 if (hci_can_send_comand_packet_transport() == 0) return 0; 592 return hci_stack->num_cmd_packets > 0u; 593 } 594 595 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 596 // check for async hci transport implementations 597 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 598 return hci_stack->hci_transport->can_send_packet_now(packet_type); 599 } 600 601 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 602 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 603 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 604 } 605 606 int hci_can_send_acl_le_packet_now(void){ 607 if (hci_stack->hci_packet_buffer_reserved) return 0; 608 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 609 } 610 611 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 612 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 613 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 614 } 615 616 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 617 if (hci_stack->hci_packet_buffer_reserved) return 0; 618 return hci_can_send_prepared_acl_packet_now(con_handle); 619 } 620 621 #ifdef ENABLE_CLASSIC 622 int hci_can_send_acl_classic_packet_now(void){ 623 if (hci_stack->hci_packet_buffer_reserved) return 0; 624 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 625 } 626 627 int hci_can_send_prepared_sco_packet_now(void){ 628 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 629 if (hci_have_usb_transport()){ 630 return hci_stack->sco_can_send_now; 631 } else { 632 return hci_number_free_sco_slots() > 0; 633 } 634 } 635 636 int hci_can_send_sco_packet_now(void){ 637 if (hci_stack->hci_packet_buffer_reserved) return 0; 638 return hci_can_send_prepared_sco_packet_now(); 639 } 640 641 void hci_request_sco_can_send_now_event(void){ 642 hci_stack->sco_waiting_for_can_send_now = 1; 643 hci_notify_if_sco_can_send_now(); 644 } 645 #endif 646 647 // used for internal checks in l2cap.c 648 int hci_is_packet_buffer_reserved(void){ 649 return hci_stack->hci_packet_buffer_reserved; 650 } 651 652 // reserves outgoing packet buffer. @returns 1 if successful 653 int hci_reserve_packet_buffer(void){ 654 if (hci_stack->hci_packet_buffer_reserved) { 655 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 656 return 0; 657 } 658 hci_stack->hci_packet_buffer_reserved = 1; 659 return 1; 660 } 661 662 void hci_release_packet_buffer(void){ 663 hci_stack->hci_packet_buffer_reserved = 0; 664 } 665 666 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 667 static int hci_transport_synchronous(void){ 668 return hci_stack->hci_transport->can_send_packet_now == NULL; 669 } 670 671 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 672 673 // 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); 674 675 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 676 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 677 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 678 max_acl_data_packet_length = hci_stack->le_data_packets_length; 679 } 680 681 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 682 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 683 max_acl_data_packet_length = connection->le_max_tx_octets; 684 } 685 #endif 686 687 log_debug("hci_send_acl_packet_fragments entered"); 688 689 int err; 690 // multiple packets could be send on a synchronous HCI transport 691 while (true){ 692 693 log_debug("hci_send_acl_packet_fragments loop entered"); 694 695 // get current data 696 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 697 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 698 bool more_fragments = false; 699 700 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 701 if (current_acl_data_packet_length > max_acl_data_packet_length){ 702 more_fragments = true; 703 current_acl_data_packet_length = max_acl_data_packet_length; 704 } 705 706 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 707 if (acl_header_pos > 0u){ 708 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 709 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 710 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 711 } 712 713 // update header len 714 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 715 716 // count packet 717 connection->num_packets_sent++; 718 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 719 720 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 721 if (more_fragments){ 722 // update start of next fragment to send 723 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 724 } else { 725 // done 726 hci_stack->acl_fragmentation_pos = 0; 727 hci_stack->acl_fragmentation_total_size = 0; 728 } 729 730 // send packet 731 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 732 const int size = current_acl_data_packet_length + 4; 733 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 734 hci_stack->acl_fragmentation_tx_active = 1; 735 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 736 737 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 738 739 // done yet? 740 if (!more_fragments) break; 741 742 // can send more? 743 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 744 } 745 746 log_debug("hci_send_acl_packet_fragments loop over"); 747 748 // release buffer now for synchronous transport 749 if (hci_transport_synchronous()){ 750 hci_stack->acl_fragmentation_tx_active = 0; 751 hci_release_packet_buffer(); 752 hci_emit_transport_packet_sent(); 753 } 754 755 return err; 756 } 757 758 // pre: caller has reserved the packet buffer 759 int hci_send_acl_packet_buffer(int size){ 760 761 // log_info("hci_send_acl_packet_buffer size %u", size); 762 763 if (!hci_stack->hci_packet_buffer_reserved) { 764 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 765 return 0; 766 } 767 768 uint8_t * packet = hci_stack->hci_packet_buffer; 769 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 770 771 // check for free places on Bluetooth module 772 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 773 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 774 hci_release_packet_buffer(); 775 hci_emit_transport_packet_sent(); 776 return BTSTACK_ACL_BUFFERS_FULL; 777 } 778 779 hci_connection_t *connection = hci_connection_for_handle( con_handle); 780 if (!connection) { 781 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 782 hci_release_packet_buffer(); 783 hci_emit_transport_packet_sent(); 784 return 0; 785 } 786 787 #ifdef ENABLE_CLASSIC 788 hci_connection_timestamp(connection); 789 #endif 790 791 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 792 793 // setup data 794 hci_stack->acl_fragmentation_total_size = size; 795 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 796 797 return hci_send_acl_packet_fragments(connection); 798 } 799 800 #ifdef ENABLE_CLASSIC 801 // pre: caller has reserved the packet buffer 802 int hci_send_sco_packet_buffer(int size){ 803 804 // log_info("hci_send_acl_packet_buffer size %u", size); 805 806 if (!hci_stack->hci_packet_buffer_reserved) { 807 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 808 return 0; 809 } 810 811 uint8_t * packet = hci_stack->hci_packet_buffer; 812 813 // skip checks in loopback mode 814 if (!hci_stack->loopback_mode){ 815 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 816 817 // check for free places on Bluetooth module 818 if (!hci_can_send_prepared_sco_packet_now()) { 819 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 820 hci_release_packet_buffer(); 821 hci_emit_transport_packet_sent(); 822 return BTSTACK_ACL_BUFFERS_FULL; 823 } 824 825 // track send packet in connection struct 826 hci_connection_t *connection = hci_connection_for_handle( con_handle); 827 if (!connection) { 828 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 829 hci_release_packet_buffer(); 830 hci_emit_transport_packet_sent(); 831 return 0; 832 } 833 834 if (hci_have_usb_transport()){ 835 // token used 836 hci_stack->sco_can_send_now = 0; 837 } else { 838 if (hci_stack->synchronous_flow_control_enabled){ 839 connection->num_packets_sent++; 840 } else { 841 connection->sco_tx_ready--; 842 } 843 } 844 } 845 846 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 847 848 #ifdef HAVE_SCO_TRANSPORT 849 hci_stack->sco_transport->send_packet(packet, size); 850 hci_release_packet_buffer(); 851 hci_emit_transport_packet_sent(); 852 853 return 0; 854 #else 855 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 856 if (hci_transport_synchronous()){ 857 hci_release_packet_buffer(); 858 hci_emit_transport_packet_sent(); 859 } 860 861 return err; 862 #endif 863 } 864 #endif 865 866 static void acl_handler(uint8_t *packet, uint16_t size){ 867 868 // get info 869 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 870 hci_connection_t *conn = hci_connection_for_handle(con_handle); 871 uint8_t acl_flags = READ_ACL_FLAGS(packet); 872 uint16_t acl_length = READ_ACL_LENGTH(packet); 873 874 // ignore non-registered handle 875 if (!conn){ 876 log_error("acl_handler called with non-registered handle %u!" , con_handle); 877 return; 878 } 879 880 // assert packet is complete 881 if ((acl_length + 4u) != size){ 882 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 883 return; 884 } 885 886 #ifdef ENABLE_CLASSIC 887 // update idle timestamp 888 hci_connection_timestamp(conn); 889 #endif 890 891 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 892 hci_stack->host_completed_packets = 1; 893 conn->num_packets_completed++; 894 #endif 895 896 // handle different packet types 897 switch (acl_flags & 0x03u) { 898 899 case 0x01: // continuation fragment 900 901 // sanity checks 902 if (conn->acl_recombination_pos == 0u) { 903 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 904 return; 905 } 906 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 907 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 908 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 909 conn->acl_recombination_pos = 0; 910 return; 911 } 912 913 // append fragment payload (header already stored) 914 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 915 &packet[4], acl_length); 916 conn->acl_recombination_pos += acl_length; 917 918 // forward complete L2CAP packet if complete. 919 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 920 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 921 // reset recombination buffer 922 conn->acl_recombination_length = 0; 923 conn->acl_recombination_pos = 0; 924 } 925 break; 926 927 case 0x02: { // first fragment 928 929 // sanity check 930 if (conn->acl_recombination_pos) { 931 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 932 conn->acl_recombination_pos = 0; 933 } 934 935 // peek into L2CAP packet! 936 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 937 938 // compare fragment size to L2CAP packet size 939 if (acl_length >= (l2cap_length + 4u)){ 940 // forward fragment as L2CAP packet 941 hci_emit_acl_packet(packet, acl_length + 4u); 942 } else { 943 944 if (acl_length > HCI_ACL_BUFFER_SIZE){ 945 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 946 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 947 return; 948 } 949 950 // store first fragment and tweak acl length for complete package 951 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 952 packet, acl_length + 4u); 953 conn->acl_recombination_pos = acl_length + 4u; 954 conn->acl_recombination_length = l2cap_length; 955 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 956 } 957 break; 958 959 } 960 default: 961 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 962 return; 963 } 964 965 // execute main loop 966 hci_run(); 967 } 968 969 static void hci_shutdown_connection(hci_connection_t *conn){ 970 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 971 972 #ifdef ENABLE_CLASSIC 973 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 974 bd_addr_type_t addr_type = conn->address_type; 975 #endif 976 #ifdef HAVE_SCO_TRANSPORT 977 hci_con_handle_t con_handle = conn->con_handle; 978 #endif 979 #endif 980 981 btstack_run_loop_remove_timer(&conn->timeout); 982 983 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 984 btstack_memory_hci_connection_free( conn ); 985 986 // now it's gone 987 hci_emit_nr_connections_changed(); 988 989 #ifdef ENABLE_CLASSIC 990 #ifdef ENABLE_SCO_OVER_HCI 991 // update SCO 992 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 993 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 994 } 995 #endif 996 #ifdef HAVE_SCO_TRANSPORT 997 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 998 hci_stack->sco_transport->close(con_handle); 999 } 1000 #endif 1001 #endif 1002 } 1003 1004 #ifdef ENABLE_CLASSIC 1005 1006 static const uint16_t packet_type_sizes[] = { 1007 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1008 HCI_ACL_DH1_SIZE, 0, 0, 0, 1009 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1010 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1011 }; 1012 static const uint8_t packet_type_feature_requirement_bit[] = { 1013 0, // 3 slot packets 1014 1, // 5 slot packets 1015 25, // EDR 2 mpbs 1016 26, // EDR 3 mbps 1017 39, // 3 slot EDR packts 1018 40, // 5 slot EDR packet 1019 }; 1020 static const uint16_t packet_type_feature_packet_mask[] = { 1021 0x0f00, // 3 slot packets 1022 0xf000, // 5 slot packets 1023 0x1102, // EDR 2 mpbs 1024 0x2204, // EDR 3 mbps 1025 0x0300, // 3 slot EDR packts 1026 0x3000, // 5 slot EDR packet 1027 }; 1028 1029 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1030 // enable packet types based on size 1031 uint16_t packet_types = 0; 1032 unsigned int i; 1033 for (i=0;i<16;i++){ 1034 if (packet_type_sizes[i] == 0) continue; 1035 if (packet_type_sizes[i] <= buffer_size){ 1036 packet_types |= 1 << i; 1037 } 1038 } 1039 // disable packet types due to missing local supported features 1040 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1041 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1042 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1043 if (feature_set) continue; 1044 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1045 packet_types &= ~packet_type_feature_packet_mask[i]; 1046 } 1047 // flip bits for "may not be used" 1048 packet_types ^= 0x3306; 1049 return packet_types; 1050 } 1051 1052 uint16_t hci_usable_acl_packet_types(void){ 1053 return hci_stack->packet_types; 1054 } 1055 #endif 1056 1057 uint8_t* hci_get_outgoing_packet_buffer(void){ 1058 // hci packet buffer is >= acl data packet length 1059 return hci_stack->hci_packet_buffer; 1060 } 1061 1062 uint16_t hci_max_acl_data_packet_length(void){ 1063 return hci_stack->acl_data_packet_length; 1064 } 1065 1066 #ifdef ENABLE_CLASSIC 1067 int hci_extended_sco_link_supported(void){ 1068 // No. 31, byte 3, bit 7 1069 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1070 } 1071 #endif 1072 1073 int hci_non_flushable_packet_boundary_flag_supported(void){ 1074 // No. 54, byte 6, bit 6 1075 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1076 } 1077 1078 static int gap_ssp_supported(void){ 1079 // No. 51, byte 6, bit 3 1080 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1081 } 1082 1083 static int hci_classic_supported(void){ 1084 #ifdef ENABLE_CLASSIC 1085 // No. 37, byte 4, bit 5, = No BR/EDR Support 1086 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1087 #else 1088 return 0; 1089 #endif 1090 } 1091 1092 static int hci_le_supported(void){ 1093 #ifdef ENABLE_BLE 1094 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1095 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1096 #else 1097 return 0; 1098 #endif 1099 } 1100 1101 #ifdef ENABLE_BLE 1102 1103 /** 1104 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1105 */ 1106 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1107 *addr_type = hci_stack->le_own_addr_type; 1108 if (hci_stack->le_own_addr_type){ 1109 (void)memcpy(addr, hci_stack->le_random_address, 6); 1110 } else { 1111 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1112 } 1113 } 1114 1115 #ifdef ENABLE_LE_CENTRAL 1116 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1117 1118 int offset = 3; 1119 int num_reports = packet[offset]; 1120 offset += 1; 1121 1122 int i; 1123 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1124 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1125 for (i=0; (i<num_reports) && (offset < size);i++){ 1126 // sanity checks on data_length: 1127 uint8_t data_length = packet[offset + 8]; 1128 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1129 if ((offset + 9u + data_length + 1u) > size) return; 1130 // setup event 1131 uint8_t event_size = 10u + data_length; 1132 int pos = 0; 1133 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1134 event[pos++] = event_size; 1135 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1136 offset += 8; 1137 pos += 8; 1138 event[pos++] = packet[offset + 1 + data_length]; // rssi 1139 event[pos++] = data_length; 1140 offset++; 1141 (void)memcpy(&event[pos], &packet[offset], data_length); 1142 pos += data_length; 1143 offset += data_length + 1u; // rssi 1144 hci_emit_event(event, pos, 1); 1145 } 1146 } 1147 #endif 1148 #endif 1149 1150 #ifdef ENABLE_BLE 1151 #ifdef ENABLE_LE_PERIPHERAL 1152 static void hci_update_advertisements_enabled_for_current_roles(void){ 1153 if (hci_stack->le_advertisements_enabled){ 1154 // get number of active le slave connections 1155 int num_slave_connections = 0; 1156 btstack_linked_list_iterator_t it; 1157 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1158 while (btstack_linked_list_iterator_has_next(&it)){ 1159 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1160 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1161 if (con->state != OPEN) continue; 1162 if (con->role != HCI_ROLE_SLAVE) continue; 1163 if (!hci_is_le_connection(con)) continue; 1164 num_slave_connections++; 1165 } 1166 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1167 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1168 } else { 1169 hci_stack->le_advertisements_enabled_for_current_roles = false; 1170 } 1171 } 1172 #endif 1173 #endif 1174 1175 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1176 1177 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1178 if (!hci_stack->config) return 0; 1179 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1180 // Limit baud rate for Broadcom chipsets to 3 mbps 1181 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1182 baud_rate = 3000000; 1183 } 1184 return baud_rate; 1185 } 1186 1187 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1188 UNUSED(ds); 1189 1190 switch (hci_stack->substate){ 1191 case HCI_INIT_W4_SEND_RESET: 1192 log_info("Resend HCI Reset"); 1193 hci_stack->substate = HCI_INIT_SEND_RESET; 1194 hci_stack->num_cmd_packets = 1; 1195 hci_run(); 1196 break; 1197 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1198 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1199 if (hci_stack->hci_transport->reset_link){ 1200 hci_stack->hci_transport->reset_link(); 1201 } 1202 1203 /* fall through */ 1204 1205 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1206 log_info("Resend HCI Reset - CSR Warm Boot"); 1207 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1208 hci_stack->num_cmd_packets = 1; 1209 hci_run(); 1210 break; 1211 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1212 if (hci_stack->hci_transport->set_baudrate){ 1213 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1214 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1215 hci_stack->hci_transport->set_baudrate(baud_rate); 1216 } 1217 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1218 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1219 if (hci_stack->hci_transport->reset_link){ 1220 log_info("Link Reset"); 1221 hci_stack->hci_transport->reset_link(); 1222 } 1223 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1224 hci_run(); 1225 } 1226 break; 1227 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1228 // otherwise continue 1229 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1230 hci_send_cmd(&hci_read_local_supported_commands); 1231 break; 1232 default: 1233 break; 1234 } 1235 } 1236 #endif 1237 1238 static void hci_initializing_next_state(void){ 1239 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1240 } 1241 1242 // assumption: hci_can_send_command_packet_now() == true 1243 static void hci_initializing_run(void){ 1244 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1245 switch (hci_stack->substate){ 1246 case HCI_INIT_SEND_RESET: 1247 hci_state_reset(); 1248 1249 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1250 // prepare reset if command complete not received in 100ms 1251 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1252 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1253 btstack_run_loop_add_timer(&hci_stack->timeout); 1254 #endif 1255 // send command 1256 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1257 hci_send_cmd(&hci_reset); 1258 break; 1259 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1260 hci_send_cmd(&hci_read_local_version_information); 1261 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1262 break; 1263 case HCI_INIT_SEND_READ_LOCAL_NAME: 1264 hci_send_cmd(&hci_read_local_name); 1265 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1266 break; 1267 1268 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1269 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1270 hci_state_reset(); 1271 // prepare reset if command complete not received in 100ms 1272 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1273 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1274 btstack_run_loop_add_timer(&hci_stack->timeout); 1275 // send command 1276 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1277 hci_send_cmd(&hci_reset); 1278 break; 1279 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1280 hci_state_reset(); 1281 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1282 hci_send_cmd(&hci_reset); 1283 break; 1284 case HCI_INIT_SEND_BAUD_CHANGE: { 1285 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1286 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1287 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1288 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1289 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1290 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1291 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1292 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1293 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1294 btstack_run_loop_add_timer(&hci_stack->timeout); 1295 } 1296 break; 1297 } 1298 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1299 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1300 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1301 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1302 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1303 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1304 break; 1305 } 1306 case HCI_INIT_CUSTOM_INIT: 1307 // Custom initialization 1308 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1309 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1310 bool send_cmd = false; 1311 switch (hci_stack->chipset_result){ 1312 case BTSTACK_CHIPSET_VALID_COMMAND: 1313 send_cmd = true; 1314 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1315 break; 1316 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1317 send_cmd = true; 1318 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1319 log_info("CSR Warm Boot"); 1320 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1321 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1322 btstack_run_loop_add_timer(&hci_stack->timeout); 1323 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1324 && hci_stack->config 1325 && hci_stack->chipset 1326 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1327 && hci_stack->hci_transport->set_baudrate 1328 && hci_transport_uart_get_main_baud_rate()){ 1329 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1330 } else { 1331 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1332 } 1333 break; 1334 default: 1335 break; 1336 } 1337 1338 if (send_cmd){ 1339 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1340 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1341 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1342 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1343 break; 1344 } 1345 log_info("Init script done"); 1346 1347 // Init script download on Broadcom chipsets causes: 1348 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1349 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1350 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1351 1352 // - baud rate to reset, restore UART baud rate if needed 1353 int need_baud_change = hci_stack->config 1354 && hci_stack->chipset 1355 && hci_stack->chipset->set_baudrate_command 1356 && hci_stack->hci_transport->set_baudrate 1357 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1358 if (need_baud_change) { 1359 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1360 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1361 hci_stack->hci_transport->set_baudrate(baud_rate); 1362 } 1363 1364 uint16_t bcm_delay_ms = 300; 1365 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1366 // -> Work around: wait here. 1367 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1368 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1369 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1370 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1371 btstack_run_loop_add_timer(&hci_stack->timeout); 1372 break; 1373 } 1374 } 1375 // otherwise continue 1376 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1377 hci_send_cmd(&hci_read_local_supported_commands); 1378 break; 1379 case HCI_INIT_SET_BD_ADDR: 1380 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1381 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1382 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1383 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1384 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1385 break; 1386 #endif 1387 1388 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1389 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1390 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1391 hci_send_cmd(&hci_read_local_supported_commands); 1392 break; 1393 case HCI_INIT_READ_BD_ADDR: 1394 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1395 hci_send_cmd(&hci_read_bd_addr); 1396 break; 1397 case HCI_INIT_READ_BUFFER_SIZE: 1398 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1399 hci_send_cmd(&hci_read_buffer_size); 1400 break; 1401 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1402 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1403 hci_send_cmd(&hci_read_local_supported_features); 1404 break; 1405 1406 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1407 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1408 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1409 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1410 break; 1411 case HCI_INIT_HOST_BUFFER_SIZE: 1412 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1413 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1414 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1415 break; 1416 #endif 1417 1418 case HCI_INIT_SET_EVENT_MASK: 1419 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1420 if (hci_le_supported()){ 1421 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1422 } else { 1423 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1424 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1425 } 1426 break; 1427 1428 #ifdef ENABLE_CLASSIC 1429 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1430 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1431 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1432 break; 1433 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1434 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1435 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1436 break; 1437 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1438 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1439 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1440 break; 1441 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1442 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1443 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1444 break; 1445 case HCI_INIT_WRITE_LOCAL_NAME: { 1446 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1447 hci_reserve_packet_buffer(); 1448 uint8_t * packet = hci_stack->hci_packet_buffer; 1449 // construct HCI Command and send 1450 uint16_t opcode = hci_write_local_name.opcode; 1451 hci_stack->last_cmd_opcode = opcode; 1452 packet[0] = opcode & 0xff; 1453 packet[1] = opcode >> 8; 1454 packet[2] = DEVICE_NAME_LEN; 1455 memset(&packet[3], 0, DEVICE_NAME_LEN); 1456 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1457 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1458 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1459 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1460 // expand '00:00:00:00:00:00' in name with bd_addr 1461 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1462 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1463 break; 1464 } 1465 case HCI_INIT_WRITE_EIR_DATA: { 1466 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1467 hci_reserve_packet_buffer(); 1468 uint8_t * packet = hci_stack->hci_packet_buffer; 1469 // construct HCI Command in-place and send 1470 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1471 hci_stack->last_cmd_opcode = opcode; 1472 uint16_t offset = 0; 1473 packet[offset++] = opcode & 0xff; 1474 packet[offset++] = opcode >> 8; 1475 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1476 packet[offset++] = 0; // FEC not required 1477 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1478 if (hci_stack->eir_data){ 1479 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1480 ad_context_t context; 1481 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1482 uint8_t data_type = ad_iterator_get_data_type(&context); 1483 uint8_t size = ad_iterator_get_data_len(&context); 1484 const uint8_t *data = ad_iterator_get_data(&context); 1485 // copy item 1486 packet[offset++] = size + 1; 1487 packet[offset++] = data_type; 1488 memcpy(&packet[offset], data, size); 1489 // update name item 1490 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1491 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1492 } 1493 offset += size; 1494 } 1495 } else { 1496 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1497 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1498 packet[offset++] = bytes_to_copy + 1; 1499 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1500 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1501 // expand '00:00:00:00:00:00' in name with bd_addr 1502 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1503 } 1504 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1505 break; 1506 } 1507 case HCI_INIT_WRITE_INQUIRY_MODE: 1508 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1509 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1510 break; 1511 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1512 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1513 hci_stack->secure_connections_active = true; 1514 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1515 break; 1516 case HCI_INIT_WRITE_SCAN_ENABLE: 1517 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1518 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1519 break; 1520 // only sent if ENABLE_SCO_OVER_HCI is defined 1521 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1522 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1523 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1524 break; 1525 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1526 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1527 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1528 break; 1529 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1530 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1531 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1532 #ifdef ENABLE_SCO_OVER_HCI 1533 log_info("BCM: Route SCO data via HCI transport"); 1534 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1535 #endif 1536 #ifdef ENABLE_SCO_OVER_PCM 1537 log_info("BCM: Route SCO data via PCM interface"); 1538 #ifdef ENABLE_BCM_PCM_WBS 1539 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1540 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1541 #else 1542 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1543 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1544 #endif 1545 #endif 1546 break; 1547 #ifdef ENABLE_SCO_OVER_PCM 1548 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1549 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1550 log_info("BCM: Config PCM interface for I2S"); 1551 #ifdef ENABLE_BCM_PCM_WBS 1552 // 512 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, 2); 1554 #else 1555 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1556 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1557 #endif 1558 break; 1559 #endif 1560 #endif 1561 1562 #ifdef ENABLE_BLE 1563 // LE INIT 1564 case HCI_INIT_LE_READ_BUFFER_SIZE: 1565 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1566 hci_send_cmd(&hci_le_read_buffer_size); 1567 break; 1568 case HCI_INIT_LE_SET_EVENT_MASK: 1569 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1570 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1571 break; 1572 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1573 // LE Supported Host = 1, Simultaneous Host = 0 1574 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1575 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1576 break; 1577 #endif 1578 1579 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1580 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1581 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1582 hci_send_cmd(&hci_le_read_maximum_data_length); 1583 break; 1584 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1585 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1586 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1587 break; 1588 #endif 1589 1590 #ifdef ENABLE_LE_CENTRAL 1591 case HCI_INIT_READ_WHITE_LIST_SIZE: 1592 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1593 hci_send_cmd(&hci_le_read_white_list_size); 1594 break; 1595 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1596 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1597 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); 1598 break; 1599 #endif 1600 default: 1601 return; 1602 } 1603 } 1604 1605 static void hci_init_done(void){ 1606 // done. tell the app 1607 log_info("hci_init_done -> HCI_STATE_WORKING"); 1608 hci_stack->state = HCI_STATE_WORKING; 1609 hci_emit_state(); 1610 hci_run(); 1611 } 1612 1613 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1614 bool command_completed = false; 1615 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1616 uint16_t opcode = little_endian_read_16(packet,3); 1617 if (opcode == hci_stack->last_cmd_opcode){ 1618 command_completed = true; 1619 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1620 } else { 1621 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1622 } 1623 } 1624 1625 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1626 uint8_t status = packet[2]; 1627 uint16_t opcode = little_endian_read_16(packet,4); 1628 if (opcode == hci_stack->last_cmd_opcode){ 1629 if (status){ 1630 command_completed = true; 1631 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1632 } else { 1633 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1634 } 1635 } else { 1636 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1637 } 1638 } 1639 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1640 // Vendor == CSR 1641 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1642 // TODO: track actual command 1643 command_completed = true; 1644 } 1645 1646 // Vendor == Toshiba 1647 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1648 // TODO: track actual command 1649 command_completed = true; 1650 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1651 hci_stack->num_cmd_packets = 1; 1652 } 1653 #endif 1654 1655 return command_completed; 1656 } 1657 1658 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1659 1660 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1661 1662 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1663 1664 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1665 1666 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1667 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1668 // 1669 // HCI Reset 1670 // Timeout 100 ms 1671 // HCI Reset 1672 // Command Complete Reset 1673 // HCI Read Local Version Information 1674 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1675 // hang... 1676 // 1677 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1678 if (!command_completed 1679 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1680 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1681 1682 uint16_t opcode = little_endian_read_16(packet,3); 1683 if (opcode == hci_reset.opcode){ 1684 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1685 return; 1686 } 1687 } 1688 1689 // CSR & H5 1690 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1691 if (!command_completed 1692 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1693 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1694 1695 uint16_t opcode = little_endian_read_16(packet,3); 1696 if (opcode == hci_reset.opcode){ 1697 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1698 return; 1699 } 1700 } 1701 1702 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1703 // fix: Correct substate and behave as command below 1704 if (command_completed){ 1705 switch (hci_stack->substate){ 1706 case HCI_INIT_SEND_RESET: 1707 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1708 break; 1709 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1710 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1711 break; 1712 default: 1713 break; 1714 } 1715 } 1716 1717 #endif 1718 1719 if (!command_completed) return; 1720 1721 bool need_baud_change = false; 1722 bool need_addr_change = false; 1723 1724 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1725 need_baud_change = hci_stack->config 1726 && hci_stack->chipset 1727 && hci_stack->chipset->set_baudrate_command 1728 && hci_stack->hci_transport->set_baudrate 1729 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1730 1731 need_addr_change = hci_stack->custom_bd_addr_set 1732 && hci_stack->chipset 1733 && hci_stack->chipset->set_bd_addr_command; 1734 #endif 1735 1736 switch(hci_stack->substate){ 1737 1738 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1739 case HCI_INIT_SEND_RESET: 1740 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1741 // fix: just correct substate and behave as command below 1742 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1743 btstack_run_loop_remove_timer(&hci_stack->timeout); 1744 break; 1745 case HCI_INIT_W4_SEND_RESET: 1746 btstack_run_loop_remove_timer(&hci_stack->timeout); 1747 break; 1748 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1749 log_info("Received local name, need baud change %d", (int) need_baud_change); 1750 if (need_baud_change){ 1751 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1752 return; 1753 } 1754 // skip baud change 1755 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1756 return; 1757 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1758 // for STLC2500D, baud rate change already happened. 1759 // for others, baud rate gets changed now 1760 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1761 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1762 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1763 hci_stack->hci_transport->set_baudrate(baud_rate); 1764 } 1765 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1766 return; 1767 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1768 btstack_run_loop_remove_timer(&hci_stack->timeout); 1769 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1770 return; 1771 case HCI_INIT_W4_CUSTOM_INIT: 1772 // repeat custom init 1773 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1774 return; 1775 #else 1776 case HCI_INIT_W4_SEND_RESET: 1777 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1778 return ; 1779 #endif 1780 1781 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1782 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1783 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1784 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1785 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1786 return; 1787 } 1788 if (need_addr_change){ 1789 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1790 return; 1791 } 1792 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1793 return; 1794 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1795 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1796 if (need_baud_change){ 1797 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1798 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1799 hci_stack->hci_transport->set_baudrate(baud_rate); 1800 } 1801 if (need_addr_change){ 1802 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1803 return; 1804 } 1805 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1806 return; 1807 case HCI_INIT_W4_SET_BD_ADDR: 1808 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1809 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1810 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1811 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1812 return; 1813 } 1814 // skipping st warm boot 1815 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1816 return; 1817 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1818 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1819 return; 1820 #endif 1821 case HCI_INIT_W4_READ_BD_ADDR: 1822 // only read buffer size if supported 1823 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1824 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1825 return; 1826 } 1827 // skipping read buffer size 1828 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1829 return; 1830 case HCI_INIT_W4_SET_EVENT_MASK: 1831 // skip Classic init commands for LE only chipsets 1832 if (!hci_classic_supported()){ 1833 #ifdef ENABLE_BLE 1834 if (hci_le_supported()){ 1835 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1836 return; 1837 } 1838 #endif 1839 log_error("Neither BR/EDR nor LE supported"); 1840 hci_init_done(); 1841 return; 1842 } 1843 if (!gap_ssp_supported()){ 1844 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1845 return; 1846 } 1847 break; 1848 #ifdef ENABLE_BLE 1849 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1850 // skip write le host if not supported (e.g. on LE only EM9301) 1851 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1852 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1853 return; 1854 1855 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1856 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1857 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1858 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1859 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1860 return; 1861 } 1862 // explicit fall through to reduce repetitions 1863 1864 #ifdef ENABLE_LE_CENTRAL 1865 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1866 #else 1867 hci_init_done(); 1868 #endif 1869 return; 1870 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1871 1872 #endif /* ENABLE_BLE */ 1873 1874 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1875 // skip write secure connections host support if not supported or disabled 1876 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1877 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1878 return; 1879 } 1880 break; 1881 1882 #ifdef ENABLE_SCO_OVER_HCI 1883 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1884 // skip write synchronous flow control if not supported 1885 if (hci_stack->local_supported_commands[0] & 0x04) break; 1886 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1887 1888 /* fall through */ 1889 1890 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1891 // skip write default erroneous data reporting if not supported 1892 if (hci_stack->local_supported_commands[0] & 0x08) break; 1893 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1894 1895 /* fall through */ 1896 1897 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1898 // skip bcm set sco pcm config on non-Broadcom chipsets 1899 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1900 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1901 1902 /* fall through */ 1903 1904 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1905 if (!hci_le_supported()){ 1906 // SKIP LE init for Classic only configuration 1907 hci_init_done(); 1908 return; 1909 } 1910 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1911 break; 1912 1913 #else /* !ENABLE_SCO_OVER_HCI */ 1914 1915 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1916 #ifdef ENABLE_SCO_OVER_PCM 1917 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1918 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1919 return; 1920 } 1921 #endif 1922 /* fall through */ 1923 1924 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1925 #ifdef ENABLE_BLE 1926 if (hci_le_supported()){ 1927 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1928 return; 1929 } 1930 #endif 1931 // SKIP LE init for Classic only configuration 1932 hci_init_done(); 1933 return; 1934 #endif /* ENABLE_SCO_OVER_HCI */ 1935 1936 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1937 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1938 // Response to command before init done state -> init done 1939 case (HCI_INIT_DONE-1): 1940 hci_init_done(); 1941 return; 1942 #endif 1943 1944 default: 1945 break; 1946 } 1947 hci_initializing_next_state(); 1948 } 1949 1950 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1951 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1952 bd_addr_t bd_address; 1953 (void)memcpy(&bd_address, conn->address, 6); 1954 1955 #ifdef ENABLE_CLASSIC 1956 // cache needed data 1957 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1958 #endif 1959 1960 // connection failed, remove entry 1961 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1962 btstack_memory_hci_connection_free( conn ); 1963 1964 #ifdef ENABLE_CLASSIC 1965 // notify client if dedicated bonding 1966 if (notify_dedicated_bonding_failed){ 1967 log_info("hci notify_dedicated_bonding_failed"); 1968 hci_emit_dedicated_bonding_result(bd_address, status); 1969 } 1970 1971 // if authentication error, also delete link key 1972 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1973 gap_drop_link_key_for_bd_addr(bd_address); 1974 } 1975 #else 1976 UNUSED(status); 1977 #endif 1978 } 1979 1980 #ifdef ENABLE_CLASSIC 1981 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1982 // SSP Controller 1983 if (features[6] & (1 << 3)){ 1984 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1985 } 1986 // eSCO 1987 if (features[3] & (1<<7)){ 1988 conn->remote_supported_features[0] |= 1; 1989 } 1990 // Extended features 1991 if (features[7] & (1<<7)){ 1992 conn->remote_supported_features[0] |= 2; 1993 } 1994 } 1995 1996 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1997 // SSP Host 1998 if (features[0] & (1 << 0)){ 1999 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2000 } 2001 // SC Host 2002 if (features[0] & (1 << 3)){ 2003 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2004 } 2005 } 2006 2007 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2008 // SC Controller 2009 if (features[1] & (1 << 0)){ 2010 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2011 } 2012 } 2013 2014 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2015 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2016 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2017 if (conn->bonding_flags & BONDING_DEDICATED){ 2018 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2019 } 2020 } 2021 #endif 2022 2023 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2024 // handle BT initialization 2025 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2026 hci_initializing_event_handler(packet, size); 2027 } 2028 2029 // help with BT sleep 2030 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2031 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2032 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2033 hci_initializing_next_state(); 2034 } 2035 } 2036 2037 #ifdef ENABLE_CLASSIC 2038 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2039 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2040 conn->encryption_key_size = encryption_key_size; 2041 2042 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 2043 conn->requested_security_level = LEVEL_0; 2044 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2045 return; 2046 } 2047 2048 // Request Authentication if not already done 2049 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2050 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2051 } 2052 #endif 2053 2054 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2055 UNUSED(size); 2056 2057 uint16_t manufacturer; 2058 #ifdef ENABLE_CLASSIC 2059 hci_con_handle_t handle; 2060 hci_connection_t * conn; 2061 uint8_t status; 2062 #endif 2063 // get num cmd packets - limit to 1 to reduce complexity 2064 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2065 2066 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2067 switch (opcode){ 2068 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2069 if (packet[5]) break; 2070 // terminate, name 248 chars 2071 packet[6+248] = 0; 2072 log_info("local name: %s", &packet[6]); 2073 break; 2074 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2075 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2076 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2077 uint16_t acl_len = little_endian_read_16(packet, 6); 2078 uint16_t sco_len = packet[8]; 2079 2080 // determine usable ACL/SCO payload size 2081 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2082 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2083 2084 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2085 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2086 2087 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2088 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2089 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2090 } 2091 break; 2092 case HCI_OPCODE_HCI_READ_RSSI: 2093 if (packet[5] == ERROR_CODE_SUCCESS){ 2094 uint8_t event[5]; 2095 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2096 event[1] = 3; 2097 (void)memcpy(&event[2], &packet[6], 3); 2098 hci_emit_event(event, sizeof(event), 1); 2099 } 2100 break; 2101 #ifdef ENABLE_BLE 2102 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2103 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2104 hci_stack->le_acl_packets_total_num = packet[8]; 2105 // determine usable ACL payload size 2106 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2107 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2108 } 2109 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2110 break; 2111 #endif 2112 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2113 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2114 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2115 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2116 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); 2117 break; 2118 #endif 2119 #ifdef ENABLE_LE_CENTRAL 2120 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2121 hci_stack->le_whitelist_capacity = packet[6]; 2122 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2123 break; 2124 #endif 2125 case HCI_OPCODE_HCI_READ_BD_ADDR: 2126 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2127 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)); 2128 #ifdef ENABLE_CLASSIC 2129 if (hci_stack->link_key_db){ 2130 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2131 } 2132 #endif 2133 break; 2134 #ifdef ENABLE_CLASSIC 2135 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2136 hci_emit_discoverable_enabled(hci_stack->discoverable); 2137 break; 2138 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2139 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2140 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2141 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2142 hci_emit_event(event, sizeof(event), 1); 2143 } 2144 break; 2145 #endif 2146 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2147 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2148 2149 #ifdef ENABLE_CLASSIC 2150 // determine usable ACL packet types based on host buffer size and supported features 2151 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2152 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2153 #endif 2154 // Classic/LE 2155 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2156 break; 2157 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2158 manufacturer = little_endian_read_16(packet, 10); 2159 // map Cypress to Broadcom 2160 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2161 log_info("Treat Cypress as Broadcom"); 2162 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2163 little_endian_store_16(packet, 10, manufacturer); 2164 } 2165 hci_stack->manufacturer = manufacturer; 2166 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2167 break; 2168 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2169 hci_stack->local_supported_commands[0] = 2170 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2171 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2172 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2173 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2174 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2175 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2176 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2177 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2178 hci_stack->local_supported_commands[1] = 2179 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2180 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2181 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2182 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2183 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2184 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2185 break; 2186 #ifdef ENABLE_CLASSIC 2187 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2188 if (packet[5]) return; 2189 hci_stack->synchronous_flow_control_enabled = 1; 2190 break; 2191 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2192 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2193 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2194 conn = hci_connection_for_handle(handle); 2195 if (conn != NULL) { 2196 uint8_t key_size = 0; 2197 if (status == 0){ 2198 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2199 log_info("Handle %04x key Size: %u", handle, key_size); 2200 } else { 2201 key_size = 1; 2202 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2203 } 2204 hci_handle_read_encryption_key_size_complete(conn, key_size); 2205 } 2206 break; 2207 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2208 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2209 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2210 uint8_t event[67]; 2211 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2212 event[1] = 65; 2213 (void)memset(&event[2], 0, 65); 2214 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2215 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2216 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2217 event[2] = 3; 2218 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2219 } else { 2220 event[2] = 1; 2221 } 2222 } 2223 hci_emit_event(event, sizeof(event), 0); 2224 break; 2225 } 2226 #endif 2227 #endif 2228 default: 2229 break; 2230 } 2231 } 2232 2233 #ifdef ENABLE_BLE 2234 static void event_handle_le_connection_complete(const uint8_t * packet){ 2235 bd_addr_t addr; 2236 bd_addr_type_t addr_type; 2237 hci_connection_t * conn; 2238 2239 // Connection management 2240 reverse_bd_addr(&packet[8], addr); 2241 addr_type = (bd_addr_type_t)packet[7]; 2242 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2243 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2244 2245 #ifdef ENABLE_LE_CENTRAL 2246 // handle error: error is reported only to the initiator -> outgoing connection 2247 if (packet[3]){ 2248 2249 // handle cancelled outgoing connection 2250 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2251 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2252 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2253 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2254 // reset state 2255 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2256 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2257 // get outgoing connection conn struct for direct connect 2258 conn = gap_get_outgoing_connection(); 2259 } 2260 2261 // outgoing le connection establishment is done 2262 if (conn){ 2263 // remove entry 2264 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2265 btstack_memory_hci_connection_free( conn ); 2266 } 2267 return; 2268 } 2269 #endif 2270 2271 // on success, both hosts receive connection complete event 2272 if (packet[6] == HCI_ROLE_MASTER){ 2273 #ifdef ENABLE_LE_CENTRAL 2274 // if we're master on an le connection, it was an outgoing connection and we're done with it 2275 // note: no hci_connection_t object exists yet for connect with whitelist 2276 if (hci_is_le_connection_type(addr_type)){ 2277 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2278 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2279 } 2280 #endif 2281 } else { 2282 #ifdef ENABLE_LE_PERIPHERAL 2283 // if we're slave, it was an incoming connection, advertisements have stopped 2284 hci_stack->le_advertisements_active = false; 2285 #endif 2286 } 2287 2288 // LE connections are auto-accepted, so just create a connection if there isn't one already 2289 if (!conn){ 2290 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2291 } 2292 2293 // no memory, sorry. 2294 if (!conn){ 2295 return; 2296 } 2297 2298 conn->state = OPEN; 2299 conn->role = packet[6]; 2300 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2301 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2302 2303 #ifdef ENABLE_LE_PERIPHERAL 2304 if (packet[6] == HCI_ROLE_SLAVE){ 2305 hci_update_advertisements_enabled_for_current_roles(); 2306 } 2307 #endif 2308 2309 // init unenhanced att bearer mtu 2310 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2311 conn->att_connection.mtu_exchanged = false; 2312 2313 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2314 2315 // restart timer 2316 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2317 // btstack_run_loop_add_timer(&conn->timeout); 2318 2319 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2320 2321 hci_emit_nr_connections_changed(); 2322 } 2323 #endif 2324 2325 #ifdef ENABLE_CLASSIC 2326 static bool hci_ssp_security_level_possible_for_io_cap(gap_security_level_t level, uint8_t io_cap_local, uint8_t io_cap_remote){ 2327 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2328 // LEVEL_4 is tested by l2cap 2329 // LEVEL 3 requires MITM protection -> check io capabilities 2330 if (level >= LEVEL_3){ 2331 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2332 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2333 if ((io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) && (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY)) return false; 2334 } 2335 // LEVEL 2 requires SSP, which is a given 2336 return true; 2337 } 2338 2339 static bool hci_ssp_validate_possible_security_level(bd_addr_t addr){ 2340 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2341 if (!conn) return false; 2342 // abort pairing, if requested security level cannot be met 2343 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2344 // inlined hci_add_connection_flags_for_flipped_bd_addr 2345 connectionSetAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 2346 hci_connection_timestamp(conn); 2347 return true; 2348 } else { 2349 log_info("Level %u cannot be reached", conn->requested_security_level); 2350 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2351 return false; 2352 }; 2353 } 2354 2355 #endif 2356 2357 static void event_handler(uint8_t *packet, uint16_t size){ 2358 2359 uint16_t event_length = packet[1]; 2360 2361 // assert packet is complete 2362 if (size != (event_length + 2u)){ 2363 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2364 return; 2365 } 2366 2367 bd_addr_type_t addr_type; 2368 hci_con_handle_t handle; 2369 hci_connection_t * conn; 2370 int i; 2371 int create_connection_cmd; 2372 2373 #ifdef ENABLE_CLASSIC 2374 hci_link_type_t link_type; 2375 bd_addr_t addr; 2376 #endif 2377 2378 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2379 2380 switch (hci_event_packet_get_type(packet)) { 2381 2382 case HCI_EVENT_COMMAND_COMPLETE: 2383 handle_command_complete_event(packet, size); 2384 break; 2385 2386 case HCI_EVENT_COMMAND_STATUS: 2387 // get num cmd packets - limit to 1 to reduce complexity 2388 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2389 2390 // check command status to detected failed outgoing connections 2391 create_connection_cmd = 0; 2392 #ifdef ENABLE_CLASSIC 2393 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2394 create_connection_cmd = 1; 2395 } 2396 #endif 2397 #ifdef ENABLE_LE_CENTRAL 2398 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2399 create_connection_cmd = 1; 2400 } 2401 #endif 2402 if (create_connection_cmd) { 2403 uint8_t status = hci_event_command_status_get_status(packet); 2404 addr_type = hci_stack->outgoing_addr_type; 2405 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2406 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); 2407 2408 // reset outgoing address info 2409 memset(hci_stack->outgoing_addr, 0, 6); 2410 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2411 2412 // on error 2413 if (status != ERROR_CODE_SUCCESS){ 2414 #ifdef ENABLE_LE_CENTRAL 2415 if (hci_is_le_connection_type(addr_type)){ 2416 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2417 } 2418 #endif 2419 // error => outgoing connection failed 2420 if (conn != NULL){ 2421 hci_handle_connection_failed(conn, status); 2422 } 2423 } 2424 } 2425 2426 #ifdef ENABLE_CLASSIC 2427 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2428 uint8_t status = hci_event_command_status_get_status(packet); 2429 log_info("command status (inquiry), status %x", status); 2430 if (status == ERROR_CODE_SUCCESS) { 2431 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2432 } else { 2433 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2434 } 2435 } 2436 #endif 2437 break; 2438 2439 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2440 if (size < 3) return; 2441 uint16_t num_handles = packet[2]; 2442 if (size != (3u + num_handles * 4u)) return; 2443 uint16_t offset = 3; 2444 for (i=0; i<num_handles;i++){ 2445 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2446 offset += 2u; 2447 uint16_t num_packets = little_endian_read_16(packet, offset); 2448 offset += 2u; 2449 2450 conn = hci_connection_for_handle(handle); 2451 if (!conn){ 2452 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2453 continue; 2454 } 2455 2456 if (conn->num_packets_sent >= num_packets){ 2457 conn->num_packets_sent -= num_packets; 2458 } else { 2459 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2460 conn->num_packets_sent = 0; 2461 } 2462 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2463 2464 #ifdef ENABLE_CLASSIC 2465 // For SCO, we do the can_send_now_check here 2466 hci_notify_if_sco_can_send_now(); 2467 #endif 2468 } 2469 break; 2470 } 2471 2472 #ifdef ENABLE_CLASSIC 2473 case HCI_EVENT_INQUIRY_COMPLETE: 2474 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2475 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2476 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2477 hci_emit_event(event, sizeof(event), 1); 2478 } 2479 break; 2480 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2481 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2482 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2483 } 2484 break; 2485 case HCI_EVENT_CONNECTION_REQUEST: 2486 reverse_bd_addr(&packet[2], addr); 2487 link_type = (hci_link_type_t) packet[11]; 2488 if (hci_stack->gap_classic_accept_callback != NULL){ 2489 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2490 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2491 bd_addr_copy(hci_stack->decline_addr, addr); 2492 break; 2493 } 2494 } 2495 2496 // TODO: eval COD 8-10 2497 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2498 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2499 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2500 if (!conn) { 2501 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2502 } 2503 if (!conn) { 2504 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2505 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2506 bd_addr_copy(hci_stack->decline_addr, addr); 2507 break; 2508 } 2509 conn->role = HCI_ROLE_SLAVE; 2510 conn->state = RECEIVED_CONNECTION_REQUEST; 2511 // store info about eSCO 2512 if (link_type == HCI_LINK_TYPE_ESCO){ 2513 conn->remote_supported_features[0] |= 1; 2514 } 2515 hci_run(); 2516 break; 2517 2518 case HCI_EVENT_CONNECTION_COMPLETE: 2519 // Connection management 2520 reverse_bd_addr(&packet[5], addr); 2521 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2522 addr_type = BD_ADDR_TYPE_ACL; 2523 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2524 if (conn) { 2525 if (!packet[2]){ 2526 conn->state = OPEN; 2527 conn->con_handle = little_endian_read_16(packet, 3); 2528 2529 // queue get remote feature 2530 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2531 2532 // queue set supervision timeout if we're master 2533 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2534 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2535 } 2536 2537 // restart timer 2538 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2539 btstack_run_loop_add_timer(&conn->timeout); 2540 2541 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2542 2543 hci_emit_nr_connections_changed(); 2544 } else { 2545 // connection failed 2546 hci_handle_connection_failed(conn, packet[2]); 2547 } 2548 } 2549 break; 2550 2551 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2552 reverse_bd_addr(&packet[5], addr); 2553 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2554 if (packet[2]){ 2555 // connection failed 2556 break; 2557 } 2558 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2559 if (!conn) { 2560 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2561 } 2562 if (!conn) { 2563 break; 2564 } 2565 conn->state = OPEN; 2566 conn->con_handle = little_endian_read_16(packet, 3); 2567 2568 #ifdef ENABLE_SCO_OVER_HCI 2569 // update SCO 2570 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2571 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2572 } 2573 // trigger can send now 2574 if (hci_have_usb_transport()){ 2575 hci_stack->sco_can_send_now = 1; 2576 } 2577 #endif 2578 #ifdef HAVE_SCO_TRANSPORT 2579 // configure sco transport 2580 if (hci_stack->sco_transport != NULL){ 2581 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2582 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2583 } 2584 #endif 2585 break; 2586 2587 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2588 handle = little_endian_read_16(packet, 3); 2589 conn = hci_connection_for_handle(handle); 2590 if (!conn) break; 2591 if (!packet[2]){ 2592 const uint8_t * features = &packet[5]; 2593 hci_handle_remote_features_page_0(conn, features); 2594 2595 // read extended features if possible 2596 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2597 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2598 break; 2599 } 2600 } 2601 hci_handle_remote_features_received(conn); 2602 break; 2603 2604 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2605 handle = little_endian_read_16(packet, 3); 2606 conn = hci_connection_for_handle(handle); 2607 if (!conn) break; 2608 // status = ok, page = 1 2609 if (!packet[2]) { 2610 uint8_t page_number = packet[5]; 2611 uint8_t maximum_page_number = packet[6]; 2612 const uint8_t * features = &packet[7]; 2613 bool done = false; 2614 switch (page_number){ 2615 case 1: 2616 hci_handle_remote_features_page_1(conn, features); 2617 if (maximum_page_number >= 2){ 2618 // get Secure Connections (Controller) from Page 2 if available 2619 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2620 } else { 2621 // otherwise, assume SC (Controller) == SC (Host) 2622 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2623 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2624 } 2625 done = true; 2626 } 2627 break; 2628 case 2: 2629 hci_handle_remote_features_page_2(conn, features); 2630 done = true; 2631 break; 2632 default: 2633 break; 2634 } 2635 if (!done) break; 2636 } 2637 hci_handle_remote_features_received(conn); 2638 break; 2639 2640 case HCI_EVENT_LINK_KEY_REQUEST: 2641 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2642 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2643 // request handled by hci_run() 2644 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2645 break; 2646 2647 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2648 reverse_bd_addr(&packet[2], addr); 2649 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2650 if (!conn) break; 2651 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2652 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2653 // Change Connection Encryption keeps link key type 2654 if (link_key_type != CHANGED_COMBINATION_KEY){ 2655 conn->link_key_type = link_key_type; 2656 } 2657 // cache link key. link keys stored in little-endian format for legacy reasons 2658 memcpy(&conn->link_key, &packet[8], 16); 2659 2660 // only store link key: 2661 // - if bondable enabled 2662 if (hci_stack->bondable == false) break; 2663 // - if security level sufficient 2664 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2665 // - for SSP, also check if remote side requested bonding as well 2666 if (conn->link_key_type != COMBINATION_KEY){ 2667 uint8_t auth_req_ignoring_mitm = conn->io_cap_response_auth_req & 0xfe; 2668 if (auth_req_ignoring_mitm == SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_NO_BONDING){ 2669 break; 2670 } 2671 } 2672 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2673 break; 2674 } 2675 2676 case HCI_EVENT_PIN_CODE_REQUEST: 2677 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2678 // non-bondable mode: pin code negative reply will be sent 2679 if (!hci_stack->bondable){ 2680 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2681 hci_run(); 2682 return; 2683 } 2684 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2685 if (!hci_stack->link_key_db) break; 2686 hci_event_pin_code_request_get_bd_addr(packet, addr); 2687 hci_stack->link_key_db->delete_link_key(addr); 2688 break; 2689 2690 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2691 hci_event_io_capability_response_get_bd_addr(packet, addr); 2692 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2693 if (!conn) break; 2694 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2695 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2696 break; 2697 2698 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2699 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2700 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2701 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2702 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2703 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2704 } else { 2705 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2706 } 2707 #endif 2708 break; 2709 2710 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2711 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2712 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2713 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_REMOTE_OOB_DATA_REPLY); 2714 break; 2715 #endif 2716 2717 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2718 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2719 if (hci_ssp_validate_possible_security_level(addr) == false) break; 2720 if (!hci_stack->ssp_auto_accept) break; 2721 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2722 break; 2723 2724 case HCI_EVENT_USER_PASSKEY_REQUEST: 2725 hci_event_user_passkey_request_get_bd_addr(packet, addr); 2726 if (hci_ssp_validate_possible_security_level(addr) == false) break; 2727 if (!hci_stack->ssp_auto_accept) break; 2728 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2729 break; 2730 2731 case HCI_EVENT_MODE_CHANGE: 2732 handle = hci_event_mode_change_get_handle(packet); 2733 conn = hci_connection_for_handle(handle); 2734 if (!conn) break; 2735 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2736 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2737 break; 2738 #endif 2739 2740 case HCI_EVENT_ENCRYPTION_CHANGE: 2741 handle = hci_event_encryption_change_get_connection_handle(packet); 2742 conn = hci_connection_for_handle(handle); 2743 if (!conn) break; 2744 if (hci_event_encryption_change_get_status(packet) == 0u) { 2745 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2746 if (encryption_enabled){ 2747 if (hci_is_le_connection(conn)){ 2748 // For LE, we accept connection as encrypted 2749 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2750 } 2751 #ifdef ENABLE_CLASSIC 2752 else { 2753 2754 // dedicated bonding: send result and disconnect 2755 if (conn->bonding_flags & BONDING_DEDICATED){ 2756 conn->bonding_flags &= ~BONDING_DEDICATED; 2757 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2758 conn->bonding_status = packet[2]; 2759 break; 2760 } 2761 2762 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2763 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2764 bool connected_uses_aes_ccm = encryption_enabled == 2; 2765 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2766 log_info("SC during pairing, but only E0 now -> abort"); 2767 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2768 break; 2769 } 2770 2771 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2772 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2773 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2774 } else { 2775 // if not, pretend everything is perfect 2776 hci_handle_read_encryption_key_size_complete(conn, 16); 2777 } 2778 } 2779 #endif 2780 } else { 2781 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2782 } 2783 } 2784 2785 break; 2786 2787 #ifdef ENABLE_CLASSIC 2788 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2789 handle = hci_event_authentication_complete_get_connection_handle(packet); 2790 conn = hci_connection_for_handle(handle); 2791 if (!conn) break; 2792 2793 // authenticated only if auth status == 0 2794 if (hci_event_authentication_complete_get_status(packet) == 0){ 2795 // authenticated 2796 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2797 2798 // If not already encrypted, start encryption 2799 if ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0){ 2800 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2801 break; 2802 } 2803 } 2804 2805 // emit updated security level 2806 conn->requested_security_level = LEVEL_0; 2807 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2808 break; 2809 #endif 2810 2811 // HCI_EVENT_DISCONNECTION_COMPLETE 2812 // has been split, to first notify stack before shutting connection down 2813 // see end of function, too. 2814 case HCI_EVENT_DISCONNECTION_COMPLETE: 2815 if (packet[2]) break; // status != 0 2816 handle = little_endian_read_16(packet, 3); 2817 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2818 if (hci_stack->acl_fragmentation_total_size > 0u) { 2819 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2820 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2821 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2822 hci_stack->acl_fragmentation_total_size = 0; 2823 hci_stack->acl_fragmentation_pos = 0; 2824 if (release_buffer){ 2825 hci_release_packet_buffer(); 2826 } 2827 } 2828 } 2829 2830 conn = hci_connection_for_handle(handle); 2831 if (!conn) break; 2832 // mark connection for shutdown 2833 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2834 2835 // emit dedicatd bonding event 2836 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2837 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2838 } 2839 2840 #ifdef ENABLE_BLE 2841 #ifdef ENABLE_LE_PERIPHERAL 2842 // re-enable advertisements for le connections if active 2843 if (hci_is_le_connection(conn)){ 2844 hci_update_advertisements_enabled_for_current_roles(); 2845 } 2846 #endif 2847 #endif 2848 break; 2849 2850 case HCI_EVENT_HARDWARE_ERROR: 2851 log_error("Hardware Error: 0x%02x", packet[2]); 2852 if (hci_stack->hardware_error_callback){ 2853 (*hci_stack->hardware_error_callback)(packet[2]); 2854 } else { 2855 // if no special requests, just reboot stack 2856 hci_power_control_off(); 2857 hci_power_control_on(); 2858 } 2859 break; 2860 2861 #ifdef ENABLE_CLASSIC 2862 case HCI_EVENT_ROLE_CHANGE: 2863 if (packet[2]) break; // status != 0 2864 reverse_bd_addr(&packet[3], addr); 2865 addr_type = BD_ADDR_TYPE_ACL; 2866 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2867 if (!conn) break; 2868 conn->role = packet[9]; 2869 break; 2870 #endif 2871 2872 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2873 // release packet buffer only for asynchronous transport and if there are not further fragements 2874 if (hci_transport_synchronous()) { 2875 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2876 return; // instead of break: to avoid re-entering hci_run() 2877 } 2878 hci_stack->acl_fragmentation_tx_active = 0; 2879 if (hci_stack->acl_fragmentation_total_size) break; 2880 hci_release_packet_buffer(); 2881 2882 // L2CAP receives this event via the hci_emit_event below 2883 2884 #ifdef ENABLE_CLASSIC 2885 // For SCO, we do the can_send_now_check here 2886 hci_notify_if_sco_can_send_now(); 2887 #endif 2888 break; 2889 2890 #ifdef ENABLE_CLASSIC 2891 case HCI_EVENT_SCO_CAN_SEND_NOW: 2892 // For SCO, we do the can_send_now_check here 2893 hci_stack->sco_can_send_now = 1; 2894 hci_notify_if_sco_can_send_now(); 2895 return; 2896 2897 // explode inquriy results for easier consumption 2898 case HCI_EVENT_INQUIRY_RESULT: 2899 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2900 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2901 gap_inquiry_explode(packet, size); 2902 break; 2903 #endif 2904 2905 #ifdef ENABLE_BLE 2906 case HCI_EVENT_LE_META: 2907 switch (packet[2]){ 2908 #ifdef ENABLE_LE_CENTRAL 2909 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2910 // log_info("advertising report received"); 2911 if (!hci_stack->le_scanning_enabled) break; 2912 le_handle_advertisement_report(packet, size); 2913 break; 2914 #endif 2915 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2916 event_handle_le_connection_complete(packet); 2917 break; 2918 2919 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2920 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2921 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2922 conn = hci_connection_for_handle(handle); 2923 if (!conn) break; 2924 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2925 break; 2926 2927 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2928 // connection 2929 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2930 conn = hci_connection_for_handle(handle); 2931 if (conn) { 2932 // read arguments 2933 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2934 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2935 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2936 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2937 2938 // validate against current connection parameter range 2939 le_connection_parameter_range_t existing_range; 2940 gap_get_connection_parameter_range(&existing_range); 2941 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2942 if (update_parameter){ 2943 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2944 conn->le_conn_interval_min = le_conn_interval_min; 2945 conn->le_conn_interval_max = le_conn_interval_max; 2946 conn->le_conn_latency = le_conn_latency; 2947 conn->le_supervision_timeout = le_supervision_timeout; 2948 } else { 2949 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 2950 } 2951 } 2952 break; 2953 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2954 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2955 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2956 conn = hci_connection_for_handle(handle); 2957 if (conn) { 2958 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2959 } 2960 break; 2961 #endif 2962 default: 2963 break; 2964 } 2965 break; 2966 #endif 2967 case HCI_EVENT_VENDOR_SPECIFIC: 2968 // Vendor specific commands often create vendor specific event instead of num completed packets 2969 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2970 switch (hci_stack->manufacturer){ 2971 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2972 hci_stack->num_cmd_packets = 1; 2973 break; 2974 default: 2975 break; 2976 } 2977 break; 2978 default: 2979 break; 2980 } 2981 2982 handle_event_for_current_stack_state(packet, size); 2983 2984 // notify upper stack 2985 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2986 2987 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2988 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 2989 handle = little_endian_read_16(packet, 3); 2990 hci_connection_t * aConn = hci_connection_for_handle(handle); 2991 // discard connection if app did not trigger a reconnect in the event handler 2992 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2993 hci_shutdown_connection(aConn); 2994 } 2995 } 2996 2997 // execute main loop 2998 hci_run(); 2999 } 3000 3001 #ifdef ENABLE_CLASSIC 3002 3003 #ifdef ENABLE_SCO_OVER_HCI 3004 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3005 static void sco_schedule_tx(hci_connection_t * conn); 3006 3007 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3008 log_debug("SCO TX Timeout"); 3009 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3010 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3011 if (!conn) return; 3012 3013 // trigger send 3014 conn->sco_tx_ready = 1; 3015 // extra packet if CVSD but SCO buffer is too short 3016 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3017 conn->sco_tx_ready++; 3018 } 3019 hci_notify_if_sco_can_send_now(); 3020 } 3021 3022 3023 #define SCO_TX_AFTER_RX_MS (6) 3024 3025 static void sco_schedule_tx(hci_connection_t * conn){ 3026 3027 uint32_t now = btstack_run_loop_get_time_ms(); 3028 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3029 int time_delta_ms = sco_tx_ms - now; 3030 3031 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3032 3033 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3034 btstack_run_loop_set_timer(timer, time_delta_ms); 3035 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3036 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3037 btstack_run_loop_add_timer(timer); 3038 } 3039 #endif 3040 3041 static void sco_handler(uint8_t * packet, uint16_t size){ 3042 // lookup connection struct 3043 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3044 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3045 if (!conn) return; 3046 3047 #ifdef ENABLE_SCO_OVER_HCI 3048 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3049 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3050 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3051 packet[2] = 0x3c; 3052 memmove(&packet[3], &packet[23], 63); 3053 size = 63; 3054 } 3055 } 3056 3057 if (hci_have_usb_transport()){ 3058 // Nothing to do 3059 } else { 3060 // 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); 3061 if (hci_stack->synchronous_flow_control_enabled == 0){ 3062 uint32_t now = btstack_run_loop_get_time_ms(); 3063 3064 if (!conn->sco_rx_valid){ 3065 // ignore first 10 packets 3066 conn->sco_rx_count++; 3067 // log_debug("sco rx count %u", conn->sco_rx_count); 3068 if (conn->sco_rx_count == 10) { 3069 // use first timestamp as is and pretent it just started 3070 conn->sco_rx_ms = now; 3071 conn->sco_rx_valid = 1; 3072 conn->sco_rx_count = 0; 3073 sco_schedule_tx(conn); 3074 } 3075 } else { 3076 // track expected arrival timme 3077 conn->sco_rx_count++; 3078 conn->sco_rx_ms += 7; 3079 int delta = (int32_t) (now - conn->sco_rx_ms); 3080 if (delta > 0){ 3081 conn->sco_rx_ms++; 3082 } 3083 // log_debug("sco rx %u", conn->sco_rx_ms); 3084 sco_schedule_tx(conn); 3085 } 3086 } 3087 } 3088 #endif 3089 3090 // deliver to app 3091 if (hci_stack->sco_packet_handler) { 3092 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3093 } 3094 3095 #ifdef HAVE_SCO_TRANSPORT 3096 // We can send one packet for each received packet 3097 conn->sco_tx_ready++; 3098 hci_notify_if_sco_can_send_now(); 3099 #endif 3100 3101 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3102 conn->num_packets_completed++; 3103 hci_stack->host_completed_packets = 1; 3104 hci_run(); 3105 #endif 3106 } 3107 #endif 3108 3109 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3110 hci_dump_packet(packet_type, 1, packet, size); 3111 switch (packet_type) { 3112 case HCI_EVENT_PACKET: 3113 event_handler(packet, size); 3114 break; 3115 case HCI_ACL_DATA_PACKET: 3116 acl_handler(packet, size); 3117 break; 3118 #ifdef ENABLE_CLASSIC 3119 case HCI_SCO_DATA_PACKET: 3120 sco_handler(packet, size); 3121 break; 3122 #endif 3123 default: 3124 break; 3125 } 3126 } 3127 3128 /** 3129 * @brief Add event packet handler. 3130 */ 3131 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3132 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3133 } 3134 3135 3136 /** Register HCI packet handlers */ 3137 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3138 hci_stack->acl_packet_handler = handler; 3139 } 3140 3141 #ifdef ENABLE_CLASSIC 3142 /** 3143 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3144 */ 3145 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3146 hci_stack->sco_packet_handler = handler; 3147 } 3148 #endif 3149 3150 static void hci_state_reset(void){ 3151 // no connections yet 3152 hci_stack->connections = NULL; 3153 3154 // keep discoverable/connectable as this has been requested by the client(s) 3155 // hci_stack->discoverable = 0; 3156 // hci_stack->connectable = 0; 3157 // hci_stack->bondable = 1; 3158 // hci_stack->own_addr_type = 0; 3159 3160 // buffer is free 3161 hci_stack->hci_packet_buffer_reserved = 0; 3162 3163 // no pending cmds 3164 hci_stack->decline_reason = 0; 3165 hci_stack->new_scan_enable_value = 0xff; 3166 3167 hci_stack->secure_connections_active = false; 3168 3169 #ifdef ENABLE_CLASSIC 3170 hci_stack->new_page_scan_interval = 0xffff; 3171 hci_stack->new_page_scan_window = 0xffff; 3172 hci_stack->new_page_scan_type = 0xff; 3173 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3174 #endif 3175 3176 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3177 hci_stack->classic_read_local_oob_data = true; 3178 #endif 3179 3180 // LE 3181 #ifdef ENABLE_BLE 3182 memset(hci_stack->le_random_address, 0, 6); 3183 hci_stack->le_random_address_set = 0; 3184 #endif 3185 #ifdef ENABLE_LE_CENTRAL 3186 hci_stack->le_scanning_active = false; 3187 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3188 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3189 hci_stack->le_whitelist_capacity = 0; 3190 #endif 3191 #ifdef ENABLE_LE_PERIPHERAL 3192 hci_stack->le_advertisements_active = false; 3193 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3194 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3195 } 3196 if (hci_stack->le_advertisements_data != NULL){ 3197 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3198 } 3199 #endif 3200 } 3201 3202 #ifdef ENABLE_CLASSIC 3203 /** 3204 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3205 */ 3206 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3207 // store and open remote device db 3208 hci_stack->link_key_db = link_key_db; 3209 if (hci_stack->link_key_db) { 3210 hci_stack->link_key_db->open(); 3211 } 3212 } 3213 #endif 3214 3215 void hci_init(const hci_transport_t *transport, const void *config){ 3216 3217 #ifdef HAVE_MALLOC 3218 if (!hci_stack) { 3219 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3220 } 3221 #else 3222 hci_stack = &hci_stack_static; 3223 #endif 3224 memset(hci_stack, 0, sizeof(hci_stack_t)); 3225 3226 // reference to use transport layer implementation 3227 hci_stack->hci_transport = transport; 3228 3229 // reference to used config 3230 hci_stack->config = config; 3231 3232 // setup pointer for outgoing packet buffer 3233 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3234 3235 // max acl payload size defined in config.h 3236 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3237 3238 // register packet handlers with transport 3239 transport->register_packet_handler(&packet_handler); 3240 3241 hci_stack->state = HCI_STATE_OFF; 3242 3243 // class of device 3244 hci_stack->class_of_device = 0x007a020c; // Smartphone 3245 3246 // bondable by default 3247 hci_stack->bondable = 1; 3248 3249 #ifdef ENABLE_CLASSIC 3250 // classic name 3251 hci_stack->local_name = default_classic_name; 3252 3253 // Master slave policy 3254 hci_stack->master_slave_policy = 1; 3255 3256 // Allow Role Switch 3257 hci_stack->allow_role_switch = 1; 3258 3259 // Default / minimum security level = 2 3260 hci_stack->gap_security_level = LEVEL_2; 3261 3262 // Default Security Mode 4 3263 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3264 3265 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3266 hci_stack->gap_required_encyrption_key_size = 7; 3267 3268 // Link Supervision Timeout 3269 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3270 3271 #endif 3272 3273 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3274 hci_stack->ssp_enable = 1; 3275 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3276 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3277 hci_stack->ssp_auto_accept = 1; 3278 3279 // Secure Connections: enable (requires support from Controller) 3280 hci_stack->secure_connections_enable = true; 3281 3282 // voice setting - signed 16 bit pcm data with CVSD over the air 3283 hci_stack->sco_voice_setting = 0x60; 3284 3285 #ifdef ENABLE_LE_CENTRAL 3286 // connection parameter to use for outgoing connections 3287 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3288 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3289 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3290 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3291 hci_stack->le_connection_latency = 4; // 4 3292 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3293 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3294 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3295 3296 // default LE Scanning 3297 hci_stack->le_scan_type = 0x1; // active 3298 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3299 hci_stack->le_scan_window = 0x30; // 30 ms 3300 #endif 3301 3302 #ifdef ENABLE_LE_PERIPHERAL 3303 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3304 #endif 3305 3306 // connection parameter range used to answer connection parameter update requests in l2cap 3307 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3308 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3309 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3310 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3311 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3312 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3313 3314 hci_state_reset(); 3315 } 3316 3317 void hci_deinit(void){ 3318 #ifdef HAVE_MALLOC 3319 if (hci_stack) { 3320 free(hci_stack); 3321 } 3322 #endif 3323 hci_stack = NULL; 3324 3325 #ifdef ENABLE_CLASSIC 3326 disable_l2cap_timeouts = 0; 3327 #endif 3328 } 3329 3330 /** 3331 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3332 */ 3333 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3334 hci_stack->chipset = chipset_driver; 3335 3336 // reset chipset driver - init is also called on power_up 3337 if (hci_stack->chipset && hci_stack->chipset->init){ 3338 hci_stack->chipset->init(hci_stack->config); 3339 } 3340 } 3341 3342 /** 3343 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3344 */ 3345 void hci_set_control(const btstack_control_t *hardware_control){ 3346 // references to used control implementation 3347 hci_stack->control = hardware_control; 3348 // init with transport config 3349 hardware_control->init(hci_stack->config); 3350 } 3351 3352 void hci_close(void){ 3353 3354 #ifdef ENABLE_CLASSIC 3355 // close remote device db 3356 if (hci_stack->link_key_db) { 3357 hci_stack->link_key_db->close(); 3358 } 3359 #endif 3360 3361 btstack_linked_list_iterator_t lit; 3362 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3363 while (btstack_linked_list_iterator_has_next(&lit)){ 3364 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3365 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3366 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3367 hci_shutdown_connection(connection); 3368 } 3369 3370 hci_power_control(HCI_POWER_OFF); 3371 3372 #ifdef HAVE_MALLOC 3373 free(hci_stack); 3374 #endif 3375 hci_stack = NULL; 3376 } 3377 3378 #ifdef HAVE_SCO_TRANSPORT 3379 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3380 hci_stack->sco_transport = sco_transport; 3381 sco_transport->register_packet_handler(&packet_handler); 3382 } 3383 #endif 3384 3385 #ifdef ENABLE_CLASSIC 3386 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3387 // validate ranage and set 3388 if (encryption_key_size < 7) return; 3389 if (encryption_key_size > 16) return; 3390 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3391 } 3392 3393 void gap_set_security_mode(gap_security_mode_t security_mode){ 3394 btstack_assert((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)); 3395 hci_stack->gap_security_mode = security_mode; 3396 } 3397 3398 gap_security_mode_t gap_get_security_mode(void){ 3399 return hci_stack->gap_security_mode; 3400 } 3401 3402 void gap_set_security_level(gap_security_level_t security_level){ 3403 hci_stack->gap_security_level = security_level; 3404 } 3405 3406 gap_security_level_t gap_get_security_level(void){ 3407 return hci_stack->gap_security_level; 3408 } 3409 3410 void gap_set_secure_connections_only_mode(bool enable){ 3411 hci_stack->gap_secure_connections_only_mode = enable; 3412 } 3413 3414 bool gap_get_secure_connections_only_mode(void){ 3415 return hci_stack->gap_secure_connections_only_mode; 3416 } 3417 #endif 3418 3419 #ifdef ENABLE_CLASSIC 3420 void gap_set_class_of_device(uint32_t class_of_device){ 3421 hci_stack->class_of_device = class_of_device; 3422 } 3423 3424 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3425 hci_stack->default_link_policy_settings = default_link_policy_settings; 3426 } 3427 3428 void gap_set_allow_role_switch(bool allow_role_switch){ 3429 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3430 } 3431 3432 uint8_t hci_get_allow_role_switch(void){ 3433 return hci_stack->allow_role_switch; 3434 } 3435 3436 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3437 hci_stack->link_supervision_timeout = link_supervision_timeout; 3438 } 3439 3440 void hci_disable_l2cap_timeout_check(void){ 3441 disable_l2cap_timeouts = 1; 3442 } 3443 #endif 3444 3445 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3446 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3447 void hci_set_bd_addr(bd_addr_t addr){ 3448 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3449 hci_stack->custom_bd_addr_set = 1; 3450 } 3451 #endif 3452 3453 // State-Module-Driver overview 3454 // state module low-level 3455 // HCI_STATE_OFF off close 3456 // HCI_STATE_INITIALIZING, on open 3457 // HCI_STATE_WORKING, on open 3458 // HCI_STATE_HALTING, on open 3459 // HCI_STATE_SLEEPING, off/sleep close 3460 // HCI_STATE_FALLING_ASLEEP on open 3461 3462 static int hci_power_control_on(void){ 3463 3464 // power on 3465 int err = 0; 3466 if (hci_stack->control && hci_stack->control->on){ 3467 err = (*hci_stack->control->on)(); 3468 } 3469 if (err){ 3470 log_error( "POWER_ON failed"); 3471 hci_emit_hci_open_failed(); 3472 return err; 3473 } 3474 3475 // int chipset driver 3476 if (hci_stack->chipset && hci_stack->chipset->init){ 3477 hci_stack->chipset->init(hci_stack->config); 3478 } 3479 3480 // init transport 3481 if (hci_stack->hci_transport->init){ 3482 hci_stack->hci_transport->init(hci_stack->config); 3483 } 3484 3485 // open transport 3486 err = hci_stack->hci_transport->open(); 3487 if (err){ 3488 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3489 if (hci_stack->control && hci_stack->control->off){ 3490 (*hci_stack->control->off)(); 3491 } 3492 hci_emit_hci_open_failed(); 3493 return err; 3494 } 3495 return 0; 3496 } 3497 3498 static void hci_power_control_off(void){ 3499 3500 log_info("hci_power_control_off"); 3501 3502 // close low-level device 3503 hci_stack->hci_transport->close(); 3504 3505 log_info("hci_power_control_off - hci_transport closed"); 3506 3507 // power off 3508 if (hci_stack->control && hci_stack->control->off){ 3509 (*hci_stack->control->off)(); 3510 } 3511 3512 log_info("hci_power_control_off - control closed"); 3513 3514 hci_stack->state = HCI_STATE_OFF; 3515 } 3516 3517 static void hci_power_control_sleep(void){ 3518 3519 log_info("hci_power_control_sleep"); 3520 3521 #if 0 3522 // don't close serial port during sleep 3523 3524 // close low-level device 3525 hci_stack->hci_transport->close(hci_stack->config); 3526 #endif 3527 3528 // sleep mode 3529 if (hci_stack->control && hci_stack->control->sleep){ 3530 (*hci_stack->control->sleep)(); 3531 } 3532 3533 hci_stack->state = HCI_STATE_SLEEPING; 3534 } 3535 3536 static int hci_power_control_wake(void){ 3537 3538 log_info("hci_power_control_wake"); 3539 3540 // wake on 3541 if (hci_stack->control && hci_stack->control->wake){ 3542 (*hci_stack->control->wake)(); 3543 } 3544 3545 #if 0 3546 // open low-level device 3547 int err = hci_stack->hci_transport->open(hci_stack->config); 3548 if (err){ 3549 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3550 if (hci_stack->control && hci_stack->control->off){ 3551 (*hci_stack->control->off)(); 3552 } 3553 hci_emit_hci_open_failed(); 3554 return err; 3555 } 3556 #endif 3557 3558 return 0; 3559 } 3560 3561 static void hci_power_transition_to_initializing(void){ 3562 // set up state machine 3563 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3564 hci_stack->hci_packet_buffer_reserved = 0; 3565 hci_stack->state = HCI_STATE_INITIALIZING; 3566 hci_stack->substate = HCI_INIT_SEND_RESET; 3567 } 3568 3569 // returns error 3570 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3571 int err; 3572 switch (power_mode){ 3573 case HCI_POWER_ON: 3574 err = hci_power_control_on(); 3575 if (err != 0) { 3576 log_error("hci_power_control_on() error %d", err); 3577 return err; 3578 } 3579 hci_power_transition_to_initializing(); 3580 break; 3581 case HCI_POWER_OFF: 3582 // do nothing 3583 break; 3584 case HCI_POWER_SLEEP: 3585 // do nothing (with SLEEP == OFF) 3586 break; 3587 default: 3588 btstack_assert(false); 3589 break; 3590 } 3591 return ERROR_CODE_SUCCESS; 3592 } 3593 3594 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3595 switch (power_mode){ 3596 case HCI_POWER_ON: 3597 // do nothing 3598 break; 3599 case HCI_POWER_OFF: 3600 // no connections yet, just turn it off 3601 hci_power_control_off(); 3602 break; 3603 case HCI_POWER_SLEEP: 3604 // no connections yet, just turn it off 3605 hci_power_control_sleep(); 3606 break; 3607 default: 3608 btstack_assert(false); 3609 break; 3610 } 3611 return ERROR_CODE_SUCCESS; 3612 } 3613 3614 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3615 switch (power_mode){ 3616 case HCI_POWER_ON: 3617 // do nothing 3618 break; 3619 case HCI_POWER_OFF: 3620 // see hci_run 3621 hci_stack->state = HCI_STATE_HALTING; 3622 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3623 break; 3624 case HCI_POWER_SLEEP: 3625 // see hci_run 3626 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3627 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3628 break; 3629 default: 3630 btstack_assert(false); 3631 break; 3632 } 3633 return ERROR_CODE_SUCCESS; 3634 } 3635 3636 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3637 switch (power_mode){ 3638 case HCI_POWER_ON: 3639 hci_power_transition_to_initializing(); 3640 break; 3641 case HCI_POWER_OFF: 3642 // do nothing 3643 break; 3644 case HCI_POWER_SLEEP: 3645 // see hci_run 3646 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3647 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3648 break; 3649 default: 3650 btstack_assert(false); 3651 break; 3652 } 3653 return ERROR_CODE_SUCCESS; 3654 } 3655 3656 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3657 switch (power_mode){ 3658 case HCI_POWER_ON: 3659 3660 #ifdef HAVE_PLATFORM_IPHONE_OS 3661 // nothing to do, if H4 supports power management 3662 if (btstack_control_iphone_power_management_enabled()){ 3663 hci_stack->state = HCI_STATE_INITIALIZING; 3664 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3665 break; 3666 } 3667 #endif 3668 hci_power_transition_to_initializing(); 3669 break; 3670 case HCI_POWER_OFF: 3671 // see hci_run 3672 hci_stack->state = HCI_STATE_HALTING; 3673 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3674 break; 3675 case HCI_POWER_SLEEP: 3676 // do nothing 3677 break; 3678 default: 3679 btstack_assert(false); 3680 break; 3681 } 3682 return ERROR_CODE_SUCCESS; 3683 } 3684 3685 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3686 int err; 3687 switch (power_mode){ 3688 case HCI_POWER_ON: 3689 #ifdef HAVE_PLATFORM_IPHONE_OS 3690 // nothing to do, if H4 supports power management 3691 if (btstack_control_iphone_power_management_enabled()){ 3692 hci_stack->state = HCI_STATE_INITIALIZING; 3693 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3694 hci_update_scan_enable(); 3695 break; 3696 } 3697 #endif 3698 err = hci_power_control_wake(); 3699 if (err) return err; 3700 hci_power_transition_to_initializing(); 3701 break; 3702 case HCI_POWER_OFF: 3703 hci_stack->state = HCI_STATE_HALTING; 3704 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3705 break; 3706 case HCI_POWER_SLEEP: 3707 // do nothing 3708 break; 3709 default: 3710 btstack_assert(false); 3711 break; 3712 } 3713 return ERROR_CODE_SUCCESS; 3714 } 3715 3716 int hci_power_control(HCI_POWER_MODE power_mode){ 3717 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3718 int err = 0; 3719 switch (hci_stack->state){ 3720 case HCI_STATE_OFF: 3721 err = hci_power_control_state_off(power_mode); 3722 break; 3723 case HCI_STATE_INITIALIZING: 3724 err = hci_power_control_state_initializing(power_mode); 3725 break; 3726 case HCI_STATE_WORKING: 3727 err = hci_power_control_state_working(power_mode); 3728 break; 3729 case HCI_STATE_HALTING: 3730 err = hci_power_control_state_halting(power_mode); 3731 break; 3732 case HCI_STATE_FALLING_ASLEEP: 3733 err = hci_power_control_state_falling_asleep(power_mode); 3734 break; 3735 case HCI_STATE_SLEEPING: 3736 err = hci_power_control_state_sleeping(power_mode); 3737 break; 3738 default: 3739 btstack_assert(false); 3740 break; 3741 } 3742 if (err != 0){ 3743 return err; 3744 } 3745 3746 // create internal event 3747 hci_emit_state(); 3748 3749 // trigger next/first action 3750 hci_run(); 3751 3752 return 0; 3753 } 3754 3755 3756 #ifdef ENABLE_CLASSIC 3757 3758 static void hci_update_scan_enable(void){ 3759 // 2 = page scan, 1 = inq scan 3760 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3761 hci_run(); 3762 } 3763 3764 void gap_discoverable_control(uint8_t enable){ 3765 if (enable) enable = 1; // normalize argument 3766 3767 if (hci_stack->discoverable == enable){ 3768 hci_emit_discoverable_enabled(hci_stack->discoverable); 3769 return; 3770 } 3771 3772 hci_stack->discoverable = enable; 3773 hci_update_scan_enable(); 3774 } 3775 3776 void gap_connectable_control(uint8_t enable){ 3777 if (enable) enable = 1; // normalize argument 3778 3779 // don't emit event 3780 if (hci_stack->connectable == enable) return; 3781 3782 hci_stack->connectable = enable; 3783 hci_update_scan_enable(); 3784 } 3785 #endif 3786 3787 void gap_local_bd_addr(bd_addr_t address_buffer){ 3788 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3789 } 3790 3791 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3792 static void hci_host_num_completed_packets(void){ 3793 3794 // create packet manually as arrays are not supported and num_commands should not get reduced 3795 hci_reserve_packet_buffer(); 3796 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3797 3798 uint16_t size = 0; 3799 uint16_t num_handles = 0; 3800 packet[size++] = 0x35; 3801 packet[size++] = 0x0c; 3802 size++; // skip param len 3803 size++; // skip num handles 3804 3805 // add { handle, packets } entries 3806 btstack_linked_item_t * it; 3807 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3808 hci_connection_t * connection = (hci_connection_t *) it; 3809 if (connection->num_packets_completed){ 3810 little_endian_store_16(packet, size, connection->con_handle); 3811 size += 2; 3812 little_endian_store_16(packet, size, connection->num_packets_completed); 3813 size += 2; 3814 // 3815 num_handles++; 3816 connection->num_packets_completed = 0; 3817 } 3818 } 3819 3820 packet[2] = size - 3; 3821 packet[3] = num_handles; 3822 3823 hci_stack->host_completed_packets = 0; 3824 3825 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3826 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3827 3828 // release packet buffer for synchronous transport implementations 3829 if (hci_transport_synchronous()){ 3830 hci_release_packet_buffer(); 3831 hci_emit_transport_packet_sent(); 3832 } 3833 } 3834 #endif 3835 3836 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3837 UNUSED(ds); 3838 hci_stack->substate = HCI_HALTING_CLOSE; 3839 // allow packet handlers to defer final shutdown 3840 hci_emit_state(); 3841 hci_run(); 3842 } 3843 3844 static bool hci_run_acl_fragments(void){ 3845 if (hci_stack->acl_fragmentation_total_size > 0u) { 3846 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3847 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3848 if (connection) { 3849 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3850 hci_send_acl_packet_fragments(connection); 3851 return true; 3852 } 3853 } else { 3854 // connection gone -> discard further fragments 3855 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3856 hci_stack->acl_fragmentation_total_size = 0; 3857 hci_stack->acl_fragmentation_pos = 0; 3858 } 3859 } 3860 return false; 3861 } 3862 3863 #ifdef ENABLE_CLASSIC 3864 static bool hci_run_general_gap_classic(void){ 3865 3866 // decline incoming connections 3867 if (hci_stack->decline_reason){ 3868 uint8_t reason = hci_stack->decline_reason; 3869 hci_stack->decline_reason = 0; 3870 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3871 return true; 3872 } 3873 // write page scan activity 3874 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_interval != 0xffff) && hci_classic_supported()){ 3875 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 3876 hci_stack->new_page_scan_interval = 0xffff; 3877 hci_stack->new_page_scan_window = 0xffff; 3878 return true; 3879 } 3880 // write page scan type 3881 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_type != 0xff) && hci_classic_supported()){ 3882 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 3883 hci_stack->new_page_scan_type = 0xff; 3884 return true; 3885 } 3886 // send scan enable 3887 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3888 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3889 hci_stack->new_scan_enable_value = 0xff; 3890 return true; 3891 } 3892 // start/stop inquiry 3893 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3894 uint8_t duration = hci_stack->inquiry_state; 3895 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 3896 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 3897 return true; 3898 } 3899 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3900 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3901 hci_send_cmd(&hci_inquiry_cancel); 3902 return true; 3903 } 3904 // remote name request 3905 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3906 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3907 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3908 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3909 return true; 3910 } 3911 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3912 // Local OOB data 3913 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 3914 hci_stack->classic_read_local_oob_data = false; 3915 if (hci_stack->local_supported_commands[1] & 0x10u){ 3916 hci_send_cmd(&hci_read_local_extended_oob_data); 3917 } else { 3918 hci_send_cmd(&hci_read_local_oob_data); 3919 } 3920 } 3921 #endif 3922 // pairing 3923 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3924 uint8_t state = hci_stack->gap_pairing_state; 3925 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3926 uint8_t pin_code[16]; 3927 switch (state){ 3928 case GAP_PAIRING_STATE_SEND_PIN: 3929 memset(pin_code, 0, 16); 3930 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 3931 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 3932 break; 3933 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3934 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3935 break; 3936 case GAP_PAIRING_STATE_SEND_PASSKEY: 3937 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3938 break; 3939 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3940 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3941 break; 3942 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3943 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3944 break; 3945 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3946 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3947 break; 3948 default: 3949 break; 3950 } 3951 return true; 3952 } 3953 return false; 3954 } 3955 #endif 3956 3957 #ifdef ENABLE_BLE 3958 static bool hci_run_general_gap_le(void){ 3959 3960 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3961 3962 if (hci_stack->state != HCI_STATE_WORKING) return false; 3963 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3964 3965 3966 // Phase 1: collect what to stop 3967 3968 bool scanning_stop = false; 3969 bool connecting_stop = false; 3970 bool advertising_stop = false; 3971 3972 #ifndef ENABLE_LE_CENTRAL 3973 UNUSED(scanning_stop); 3974 UNUSED(connecting_stop); 3975 #endif 3976 #ifndef ENABLE_LE_PERIPHERAL 3977 UNUSED(advertising_stop); 3978 #endif 3979 3980 // check if whitelist needs modification 3981 bool whitelist_modification_pending = false; 3982 btstack_linked_list_iterator_t lit; 3983 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3984 while (btstack_linked_list_iterator_has_next(&lit)){ 3985 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3986 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3987 whitelist_modification_pending = true; 3988 break; 3989 } 3990 } 3991 // check if resolving list needs modification 3992 bool resolving_list_modification_pending = false; 3993 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3994 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 3995 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 3996 resolving_list_modification_pending = true; 3997 } 3998 #endif 3999 4000 #ifdef ENABLE_LE_CENTRAL 4001 // scanning control 4002 if (hci_stack->le_scanning_active) { 4003 // stop if: 4004 // - parameter change required 4005 // - it's disabled 4006 // - whitelist change required but used for scanning 4007 // - resolving list modified 4008 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4009 if ((hci_stack->le_scanning_param_update) || 4010 !hci_stack->le_scanning_enabled || 4011 scanning_uses_whitelist || 4012 resolving_list_modification_pending){ 4013 4014 scanning_stop = true; 4015 } 4016 } 4017 #endif 4018 4019 #ifdef ENABLE_LE_CENTRAL 4020 // connecting control 4021 bool connecting_with_whitelist; 4022 switch (hci_stack->le_connecting_state){ 4023 case LE_CONNECTING_DIRECT: 4024 case LE_CONNECTING_WHITELIST: 4025 // stop connecting if: 4026 // - connecting uses white and whitelist modification pending 4027 // - if it got disabled 4028 // - resolving list modified 4029 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4030 if ((connecting_with_whitelist && whitelist_modification_pending) || 4031 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4032 resolving_list_modification_pending) { 4033 4034 connecting_stop = true; 4035 } 4036 break; 4037 default: 4038 break; 4039 } 4040 #endif 4041 4042 #ifdef ENABLE_LE_PERIPHERAL 4043 // le advertisement control 4044 if (hci_stack->le_advertisements_active){ 4045 // stop if: 4046 // - parameter change required 4047 // - it's disabled 4048 // - whitelist change required but used for advertisement filter policy 4049 // - resolving list modified 4050 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4051 bool advertising_change = (hci_stack->le_advertisements_todo & (LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_SET_ADV_DATA)) != 0; 4052 if (advertising_change || 4053 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4054 (advertising_uses_whitelist & whitelist_modification_pending) || 4055 resolving_list_modification_pending) { 4056 4057 advertising_stop = true; 4058 } 4059 } 4060 #endif 4061 4062 4063 // Phase 2: stop everything that should be off during modifications 4064 4065 #ifdef ENABLE_LE_CENTRAL 4066 if (scanning_stop){ 4067 hci_stack->le_scanning_active = false; 4068 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4069 return true; 4070 } 4071 #endif 4072 4073 #ifdef ENABLE_LE_CENTRAL 4074 if (connecting_stop){ 4075 hci_send_cmd(&hci_le_create_connection_cancel); 4076 return true; 4077 } 4078 #endif 4079 4080 #ifdef ENABLE_LE_PERIPHERAL 4081 if (advertising_stop){ 4082 hci_stack->le_advertisements_active = false; 4083 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4084 return true; 4085 } 4086 #endif 4087 4088 // Phase 3: modify 4089 4090 #ifdef ENABLE_LE_CENTRAL 4091 if (hci_stack->le_scanning_param_update){ 4092 hci_stack->le_scanning_param_update = false; 4093 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4094 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4095 return true; 4096 } 4097 #endif 4098 4099 #ifdef ENABLE_LE_PERIPHERAL 4100 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4101 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4102 hci_send_cmd(&hci_le_set_advertising_parameters, 4103 hci_stack->le_advertisements_interval_min, 4104 hci_stack->le_advertisements_interval_max, 4105 hci_stack->le_advertisements_type, 4106 hci_stack->le_own_addr_type, 4107 hci_stack->le_advertisements_direct_address_type, 4108 hci_stack->le_advertisements_direct_address, 4109 hci_stack->le_advertisements_channel_map, 4110 hci_stack->le_advertisements_filter_policy); 4111 return true; 4112 } 4113 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4114 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4115 uint8_t adv_data_clean[31]; 4116 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4117 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4118 hci_stack->le_advertisements_data_len); 4119 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4120 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4121 return true; 4122 } 4123 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4124 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4125 uint8_t scan_data_clean[31]; 4126 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4127 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4128 hci_stack->le_scan_response_data_len); 4129 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4130 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4131 return true; 4132 } 4133 #endif 4134 4135 4136 #ifdef ENABLE_LE_CENTRAL 4137 // if connect with whitelist was active and is not cancelled yet, wait until next time 4138 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4139 #endif 4140 4141 // LE Whitelist Management 4142 if (whitelist_modification_pending){ 4143 // add/remove entries 4144 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4145 while (btstack_linked_list_iterator_has_next(&lit)){ 4146 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4147 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4148 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4149 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4150 return true; 4151 } 4152 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4153 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4154 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4155 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4156 return true; 4157 } 4158 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4159 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4160 btstack_memory_whitelist_entry_free(entry); 4161 } 4162 } 4163 } 4164 4165 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4166 // LE Resolving List Management 4167 if (resolving_list_supported) { 4168 uint16_t i; 4169 switch (hci_stack->le_resolving_list_state) { 4170 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4171 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4172 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4173 return true; 4174 case LE_RESOLVING_LIST_READ_SIZE: 4175 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4176 hci_send_cmd(&hci_le_read_resolving_list_size); 4177 return true; 4178 case LE_RESOLVING_LIST_SEND_CLEAR: 4179 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4180 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4181 sizeof(hci_stack->le_resolving_list_add_entries)); 4182 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4183 sizeof(hci_stack->le_resolving_list_remove_entries)); 4184 hci_send_cmd(&hci_le_clear_resolving_list); 4185 return true; 4186 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4187 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4188 uint8_t offset = i >> 3; 4189 uint8_t mask = 1 << (i & 7); 4190 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4191 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4192 bd_addr_t peer_identity_addreses; 4193 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4194 sm_key_t peer_irk; 4195 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4196 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4197 4198 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4199 // trigger whitelist entry 'update' (work around for controller bug) 4200 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4201 while (btstack_linked_list_iterator_has_next(&lit)) { 4202 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4203 if (entry->address_type != peer_identity_addr_type) continue; 4204 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4205 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4206 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4207 } 4208 #endif 4209 4210 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4211 peer_identity_addreses); 4212 return true; 4213 } 4214 4215 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4216 4217 /* fall through */ 4218 4219 case LE_RESOLVING_LIST_ADD_ENTRIES: 4220 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4221 uint8_t offset = i >> 3; 4222 uint8_t mask = 1 << (i & 7); 4223 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4224 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4225 bd_addr_t peer_identity_addreses; 4226 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4227 sm_key_t peer_irk; 4228 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4229 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4230 const uint8_t *local_irk = gap_get_persistent_irk(); 4231 // command uses format specifier 'P' that stores 16-byte value without flip 4232 uint8_t local_irk_flipped[16]; 4233 uint8_t peer_irk_flipped[16]; 4234 reverse_128(local_irk, local_irk_flipped); 4235 reverse_128(peer_irk, peer_irk_flipped); 4236 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4237 peer_irk_flipped, local_irk_flipped); 4238 return true; 4239 } 4240 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4241 break; 4242 4243 default: 4244 break; 4245 } 4246 } 4247 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4248 #endif 4249 4250 // Phase 4: restore state 4251 4252 #ifdef ENABLE_LE_CENTRAL 4253 // re-start scanning 4254 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4255 hci_stack->le_scanning_active = true; 4256 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4257 return true; 4258 } 4259 #endif 4260 4261 #ifdef ENABLE_LE_CENTRAL 4262 // re-start connecting 4263 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4264 bd_addr_t null_addr; 4265 memset(null_addr, 0, 6); 4266 hci_send_cmd(&hci_le_create_connection, 4267 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4268 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4269 1, // use whitelist 4270 0, // peer address type 4271 null_addr, // peer bd addr 4272 hci_stack->le_own_addr_type, // our addr type: 4273 hci_stack->le_connection_interval_min, // conn interval min 4274 hci_stack->le_connection_interval_max, // conn interval max 4275 hci_stack->le_connection_latency, // conn latency 4276 hci_stack->le_supervision_timeout, // conn latency 4277 hci_stack->le_minimum_ce_length, // min ce length 4278 hci_stack->le_maximum_ce_length // max ce length 4279 ); 4280 return true; 4281 } 4282 #endif 4283 4284 #ifdef ENABLE_LE_PERIPHERAL 4285 // re-start advertising 4286 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4287 // check if advertisements should be enabled given 4288 hci_stack->le_advertisements_active = true; 4289 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4290 return true; 4291 } 4292 #endif 4293 4294 return false; 4295 } 4296 #endif 4297 4298 static bool hci_run_general_pending_commands(void){ 4299 btstack_linked_item_t * it; 4300 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4301 hci_connection_t * connection = (hci_connection_t *) it; 4302 4303 switch(connection->state){ 4304 case SEND_CREATE_CONNECTION: 4305 switch(connection->address_type){ 4306 #ifdef ENABLE_CLASSIC 4307 case BD_ADDR_TYPE_ACL: 4308 log_info("sending hci_create_connection"); 4309 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4310 break; 4311 #endif 4312 default: 4313 #ifdef ENABLE_BLE 4314 #ifdef ENABLE_LE_CENTRAL 4315 log_info("sending hci_le_create_connection"); 4316 hci_send_cmd(&hci_le_create_connection, 4317 hci_stack->le_connection_scan_interval, // conn scan interval 4318 hci_stack->le_connection_scan_window, // conn scan windows 4319 0, // don't use whitelist 4320 connection->address_type, // peer address type 4321 connection->address, // peer bd addr 4322 hci_stack->le_own_addr_type, // our addr type: 4323 hci_stack->le_connection_interval_min, // conn interval min 4324 hci_stack->le_connection_interval_max, // conn interval max 4325 hci_stack->le_connection_latency, // conn latency 4326 hci_stack->le_supervision_timeout, // conn latency 4327 hci_stack->le_minimum_ce_length, // min ce length 4328 hci_stack->le_maximum_ce_length // max ce length 4329 ); 4330 connection->state = SENT_CREATE_CONNECTION; 4331 #endif 4332 #endif 4333 break; 4334 } 4335 return true; 4336 4337 #ifdef ENABLE_CLASSIC 4338 case RECEIVED_CONNECTION_REQUEST: 4339 connection->role = HCI_ROLE_SLAVE; 4340 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4341 log_info("sending hci_accept_connection_request"); 4342 connection->state = ACCEPTED_CONNECTION_REQUEST; 4343 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4344 } 4345 return true; 4346 #endif 4347 4348 #ifdef ENABLE_BLE 4349 #ifdef ENABLE_LE_CENTRAL 4350 case SEND_CANCEL_CONNECTION: 4351 connection->state = SENT_CANCEL_CONNECTION; 4352 hci_send_cmd(&hci_le_create_connection_cancel); 4353 return true; 4354 #endif 4355 #endif 4356 case SEND_DISCONNECT: 4357 connection->state = SENT_DISCONNECT; 4358 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4359 return true; 4360 4361 default: 4362 break; 4363 } 4364 4365 // no further commands if connection is about to get shut down 4366 if (connection->state == SENT_DISCONNECT) continue; 4367 4368 if (connection->authentication_flags & READ_RSSI){ 4369 connectionClearAuthenticationFlags(connection, READ_RSSI); 4370 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4371 return true; 4372 } 4373 4374 #ifdef ENABLE_CLASSIC 4375 4376 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4377 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4378 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4379 return true; 4380 } 4381 4382 // Handling link key request requires remote supported features 4383 if ( ((connection->authentication_flags & HANDLE_LINK_KEY_REQUEST) != 0) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4384 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4385 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4386 4387 // lookup link key using cached key first 4388 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4389 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4390 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4391 } 4392 4393 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4394 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4395 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(connection->link_key_type) == 1) && !sc_enabled_remote; 4396 if (sc_downgrade){ 4397 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4398 connection->state = SENT_DISCONNECT; 4399 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4400 return true; 4401 } 4402 4403 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4404 if (have_link_key && security_level_sufficient){ 4405 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4406 } else { 4407 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4408 } 4409 return true; 4410 } 4411 4412 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4413 log_info("denying to pin request"); 4414 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4415 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4416 return true; 4417 } 4418 4419 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4420 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4421 // set authentication requirements: 4422 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4423 // - BONDING MODE: Dedicated if requested, otherwise bondable flag 4424 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4425 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4426 authreq |= 1; 4427 } 4428 if (connection->bonding_flags & BONDING_DEDICATED){ 4429 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4430 } else if (hci_stack->bondable){ 4431 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4432 } 4433 uint8_t have_oob_data = 0; 4434 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4435 if (connection->classic_oob_c_192 != NULL){ 4436 have_oob_data |= 1; 4437 } 4438 if (connection->classic_oob_c_256 != NULL){ 4439 have_oob_data |= 2; 4440 } 4441 #endif 4442 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4443 return true; 4444 } 4445 4446 if (connection->authentication_flags & SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4447 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4448 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4449 return true; 4450 } 4451 4452 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4453 if (connection->authentication_flags & SEND_REMOTE_OOB_DATA_REPLY){ 4454 connectionClearAuthenticationFlags(connection, SEND_REMOTE_OOB_DATA_REPLY); 4455 const uint8_t zero[16] = { 0 }; 4456 const uint8_t * r_192 = zero; 4457 const uint8_t * c_192 = zero; 4458 const uint8_t * r_256 = zero; 4459 const uint8_t * c_256 = zero; 4460 // verify P-256 OOB 4461 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4462 c_256 = connection->classic_oob_c_256; 4463 if (connection->classic_oob_r_256 != NULL) { 4464 r_256 = connection->classic_oob_r_256; 4465 } 4466 } 4467 // verify P-192 OOB 4468 if ((connection->classic_oob_c_192 != NULL)) { 4469 c_192 = connection->classic_oob_c_192; 4470 if (connection->classic_oob_r_192 != NULL) { 4471 r_192 = connection->classic_oob_r_192; 4472 } 4473 } 4474 // Reply 4475 if (c_256 != zero) { 4476 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4477 } else if (c_192 != zero){ 4478 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4479 } else { 4480 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4481 } 4482 return true; 4483 } 4484 #endif 4485 4486 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4487 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4488 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4489 return true; 4490 } 4491 4492 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4493 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4494 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4495 return true; 4496 } 4497 4498 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4499 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4500 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4501 return true; 4502 } 4503 4504 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4505 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4506 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4507 return true; 4508 } 4509 4510 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4511 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4512 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4513 return true; 4514 } 4515 4516 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4517 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4518 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4519 connection->state = SENT_DISCONNECT; 4520 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4521 return true; 4522 } 4523 4524 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4525 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4526 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4527 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4528 return true; 4529 } 4530 4531 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4532 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4533 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4534 return true; 4535 } 4536 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4537 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4538 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4539 return true; 4540 } 4541 #endif 4542 4543 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4544 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4545 if (connection->state != SENT_DISCONNECT){ 4546 connection->state = SENT_DISCONNECT; 4547 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4548 return true; 4549 } 4550 } 4551 4552 #ifdef ENABLE_CLASSIC 4553 uint16_t sniff_min_interval; 4554 switch (connection->sniff_min_interval){ 4555 case 0: 4556 break; 4557 case 0xffff: 4558 connection->sniff_min_interval = 0; 4559 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4560 return true; 4561 default: 4562 sniff_min_interval = connection->sniff_min_interval; 4563 connection->sniff_min_interval = 0; 4564 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4565 return true; 4566 } 4567 4568 if (connection->sniff_subrating_max_latency != 0xffff){ 4569 uint16_t max_latency = connection->sniff_subrating_max_latency; 4570 connection->sniff_subrating_max_latency = 0; 4571 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4572 return true; 4573 } 4574 4575 if (connection->qos_service_type != HCI_SERVICE_TyPE_INVALID){ 4576 uint8_t service_type = (uint8_t) connection->qos_service_type; 4577 connection->qos_service_type = HCI_SERVICE_TyPE_INVALID; 4578 hci_send_cmd(&hci_qos_setup, connection->con_handle, 0, service_type, connection->qos_token_rate, connection->qos_peak_bandwidth, connection->qos_latency, connection->qos_delay_variation); 4579 return true; 4580 } 4581 4582 if (connection->request_role != HCI_ROLE_INVALID){ 4583 hci_role_t role = connection->request_role; 4584 connection->request_role = HCI_ROLE_INVALID; 4585 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4586 return true; 4587 } 4588 #endif 4589 4590 #ifdef ENABLE_BLE 4591 switch (connection->le_con_parameter_update_state){ 4592 // response to L2CAP CON PARAMETER UPDATE REQUEST 4593 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4594 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4595 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4596 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4597 0x0000, 0xffff); 4598 return true; 4599 case CON_PARAMETER_UPDATE_REPLY: 4600 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4601 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4602 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4603 0x0000, 0xffff); 4604 return true; 4605 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4606 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4607 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4608 return true; 4609 default: 4610 break; 4611 } 4612 if (connection->le_phy_update_all_phys != 0xffu){ 4613 uint8_t all_phys = connection->le_phy_update_all_phys; 4614 connection->le_phy_update_all_phys = 0xff; 4615 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); 4616 return true; 4617 } 4618 #endif 4619 } 4620 return false; 4621 } 4622 4623 static void hci_run(void){ 4624 4625 bool done; 4626 4627 // send continuation fragments first, as they block the prepared packet buffer 4628 done = hci_run_acl_fragments(); 4629 if (done) return; 4630 4631 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4632 // send host num completed packets next as they don't require num_cmd_packets > 0 4633 if (!hci_can_send_comand_packet_transport()) return; 4634 if (hci_stack->host_completed_packets){ 4635 hci_host_num_completed_packets(); 4636 return; 4637 } 4638 #endif 4639 4640 if (!hci_can_send_command_packet_now()) return; 4641 4642 // global/non-connection oriented commands 4643 4644 4645 #ifdef ENABLE_CLASSIC 4646 // general gap classic 4647 done = hci_run_general_gap_classic(); 4648 if (done) return; 4649 #endif 4650 4651 #ifdef ENABLE_BLE 4652 // general gap le 4653 done = hci_run_general_gap_le(); 4654 if (done) return; 4655 #endif 4656 4657 // send pending HCI commands 4658 done = hci_run_general_pending_commands(); 4659 if (done) return; 4660 4661 // stack state sub statemachines 4662 hci_connection_t * connection; 4663 switch (hci_stack->state){ 4664 case HCI_STATE_INITIALIZING: 4665 hci_initializing_run(); 4666 break; 4667 4668 case HCI_STATE_HALTING: 4669 4670 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4671 switch (hci_stack->substate){ 4672 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4673 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4674 4675 #ifdef ENABLE_BLE 4676 #ifdef ENABLE_LE_CENTRAL 4677 // free whitelist entries 4678 { 4679 btstack_linked_list_iterator_t lit; 4680 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4681 while (btstack_linked_list_iterator_has_next(&lit)){ 4682 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4683 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4684 btstack_memory_whitelist_entry_free(entry); 4685 } 4686 } 4687 #endif 4688 #endif 4689 // close all open connections 4690 connection = (hci_connection_t *) hci_stack->connections; 4691 if (connection){ 4692 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4693 if (!hci_can_send_command_packet_now()) return; 4694 4695 // check state 4696 if (connection->state == SENT_DISCONNECT) return; 4697 connection->state = SENT_DISCONNECT; 4698 4699 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4700 4701 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4702 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4703 4704 // ... which would be ignored anyway as we shutdown (free) the connection now 4705 hci_shutdown_connection(connection); 4706 4707 // finally, send the disconnect command 4708 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4709 return; 4710 } 4711 4712 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4713 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4714 log_info("HCI_STATE_HALTING: wait 50 ms"); 4715 hci_stack->substate = HCI_HALTING_W4_TIMER; 4716 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4717 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4718 btstack_run_loop_add_timer(&hci_stack->timeout); 4719 break; 4720 } 4721 4722 /* fall through */ 4723 4724 case HCI_HALTING_CLOSE: 4725 log_info("HCI_STATE_HALTING, calling off"); 4726 4727 // switch mode 4728 hci_power_control_off(); 4729 4730 log_info("HCI_STATE_HALTING, emitting state"); 4731 hci_emit_state(); 4732 log_info("HCI_STATE_HALTING, done"); 4733 break; 4734 4735 case HCI_HALTING_W4_TIMER: 4736 // keep waiting 4737 4738 break; 4739 default: 4740 break; 4741 } 4742 4743 break; 4744 4745 case HCI_STATE_FALLING_ASLEEP: 4746 switch(hci_stack->substate) { 4747 case HCI_FALLING_ASLEEP_DISCONNECT: 4748 log_info("HCI_STATE_FALLING_ASLEEP"); 4749 // close all open connections 4750 connection = (hci_connection_t *) hci_stack->connections; 4751 4752 #ifdef HAVE_PLATFORM_IPHONE_OS 4753 // don't close connections, if H4 supports power management 4754 if (btstack_control_iphone_power_management_enabled()){ 4755 connection = NULL; 4756 } 4757 #endif 4758 if (connection){ 4759 4760 // send disconnect 4761 if (!hci_can_send_command_packet_now()) return; 4762 4763 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4764 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4765 4766 // send disconnected event right away - causes higher layer connections to get closed, too. 4767 hci_shutdown_connection(connection); 4768 return; 4769 } 4770 4771 if (hci_classic_supported()){ 4772 // disable page and inquiry scan 4773 if (!hci_can_send_command_packet_now()) return; 4774 4775 log_info("HCI_STATE_HALTING, disabling inq scans"); 4776 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4777 4778 // continue in next sub state 4779 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4780 break; 4781 } 4782 4783 /* fall through */ 4784 4785 case HCI_FALLING_ASLEEP_COMPLETE: 4786 log_info("HCI_STATE_HALTING, calling sleep"); 4787 #ifdef HAVE_PLATFORM_IPHONE_OS 4788 // don't actually go to sleep, if H4 supports power management 4789 if (btstack_control_iphone_power_management_enabled()){ 4790 // SLEEP MODE reached 4791 hci_stack->state = HCI_STATE_SLEEPING; 4792 hci_emit_state(); 4793 break; 4794 } 4795 #endif 4796 // switch mode 4797 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4798 hci_emit_state(); 4799 break; 4800 4801 default: 4802 break; 4803 } 4804 break; 4805 4806 default: 4807 break; 4808 } 4809 } 4810 4811 int hci_send_cmd_packet(uint8_t *packet, int size){ 4812 // house-keeping 4813 4814 #ifdef ENABLE_CLASSIC 4815 bd_addr_t addr; 4816 hci_connection_t * conn; 4817 #endif 4818 #ifdef ENABLE_LE_CENTRAL 4819 uint8_t initiator_filter_policy; 4820 #endif 4821 4822 uint16_t opcode = little_endian_read_16(packet, 0); 4823 switch (opcode) { 4824 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4825 hci_stack->loopback_mode = packet[3]; 4826 break; 4827 4828 #ifdef ENABLE_CLASSIC 4829 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4830 reverse_bd_addr(&packet[3], addr); 4831 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4832 4833 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4834 if (!conn) { 4835 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4836 if (!conn) { 4837 // notify client that alloc failed 4838 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4839 return -1; // packet not sent to controller 4840 } 4841 conn->state = SEND_CREATE_CONNECTION; 4842 conn->role = HCI_ROLE_MASTER; 4843 } 4844 log_info("conn state %u", conn->state); 4845 switch (conn->state) { 4846 // if connection active exists 4847 case OPEN: 4848 // and OPEN, emit connection complete command 4849 hci_emit_connection_complete(addr, conn->con_handle, 0); 4850 return -1; // packet not sent to controller 4851 case RECEIVED_DISCONNECTION_COMPLETE: 4852 // create connection triggered in disconnect complete event, let's do it now 4853 break; 4854 case SEND_CREATE_CONNECTION: 4855 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4856 break; 4857 default: 4858 // otherwise, just ignore as it is already in the open process 4859 return -1; // packet not sent to controller 4860 } 4861 conn->state = SENT_CREATE_CONNECTION; 4862 4863 // track outgoing connection 4864 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4865 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4866 break; 4867 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4868 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4869 break; 4870 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4871 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4872 break; 4873 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4874 if (hci_stack->link_key_db) { 4875 reverse_bd_addr(&packet[3], addr); 4876 hci_stack->link_key_db->delete_link_key(addr); 4877 } 4878 break; 4879 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4880 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4881 reverse_bd_addr(&packet[3], addr); 4882 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4883 if (conn) { 4884 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4885 } 4886 break; 4887 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4888 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4889 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4890 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4891 reverse_bd_addr(&packet[3], addr); 4892 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4893 if (conn) { 4894 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4895 } 4896 break; 4897 4898 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 4899 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4900 // setup_synchronous_connection? Voice setting at offset 22 4901 // TODO: compare to current setting if sco connection already active 4902 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4903 break; 4904 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4905 // accept_synchronus_connection? Voice setting at offset 18 4906 // TODO: compare to current setting if sco connection already active 4907 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4908 break; 4909 #endif 4910 #endif 4911 4912 #ifdef ENABLE_BLE 4913 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4914 hci_stack->le_random_address_set = 1; 4915 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4916 break; 4917 #ifdef ENABLE_LE_PERIPHERAL 4918 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4919 hci_stack->le_advertisements_active = packet[3] != 0; 4920 break; 4921 #endif 4922 #ifdef ENABLE_LE_CENTRAL 4923 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4924 // white list used? 4925 initiator_filter_policy = packet[7]; 4926 switch (initiator_filter_policy) { 4927 case 0: 4928 // whitelist not used 4929 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4930 break; 4931 case 1: 4932 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4933 break; 4934 default: 4935 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4936 break; 4937 } 4938 // track outgoing connection 4939 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 4940 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 4941 break; 4942 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4943 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 4944 break; 4945 #endif 4946 #endif 4947 default: 4948 break; 4949 } 4950 4951 hci_stack->num_cmd_packets--; 4952 4953 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4954 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4955 } 4956 4957 // disconnect because of security block 4958 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4959 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4960 if (!connection) return; 4961 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4962 } 4963 4964 4965 // Configure Secure Simple Pairing 4966 4967 #ifdef ENABLE_CLASSIC 4968 4969 // enable will enable SSP during init 4970 void gap_ssp_set_enable(int enable){ 4971 hci_stack->ssp_enable = enable; 4972 } 4973 4974 static int hci_local_ssp_activated(void){ 4975 return gap_ssp_supported() && hci_stack->ssp_enable; 4976 } 4977 4978 // if set, BTstack will respond to io capability request using authentication requirement 4979 void gap_ssp_set_io_capability(int io_capability){ 4980 hci_stack->ssp_io_capability = io_capability; 4981 } 4982 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4983 hci_stack->ssp_authentication_requirement = authentication_requirement; 4984 } 4985 4986 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4987 void gap_ssp_set_auto_accept(int auto_accept){ 4988 hci_stack->ssp_auto_accept = auto_accept; 4989 } 4990 4991 void gap_secure_connections_enable(bool enable){ 4992 hci_stack->secure_connections_enable = enable; 4993 } 4994 4995 #endif 4996 4997 // va_list part of hci_send_cmd 4998 int hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 4999 if (!hci_can_send_command_packet_now()){ 5000 log_error("hci_send_cmd called but cannot send packet now"); 5001 return 0; 5002 } 5003 5004 // for HCI INITIALIZATION 5005 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5006 hci_stack->last_cmd_opcode = cmd->opcode; 5007 5008 hci_reserve_packet_buffer(); 5009 uint8_t * packet = hci_stack->hci_packet_buffer; 5010 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5011 int err = hci_send_cmd_packet(packet, size); 5012 5013 // release packet buffer on error or for synchronous transport implementations 5014 if ((err < 0) || hci_transport_synchronous()){ 5015 hci_release_packet_buffer(); 5016 hci_emit_transport_packet_sent(); 5017 } 5018 5019 return err; 5020 } 5021 5022 /** 5023 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5024 */ 5025 int hci_send_cmd(const hci_cmd_t * cmd, ...){ 5026 va_list argptr; 5027 va_start(argptr, cmd); 5028 int res = hci_send_cmd_va_arg(cmd, argptr); 5029 va_end(argptr); 5030 return res; 5031 } 5032 5033 // Create various non-HCI events. 5034 // TODO: generalize, use table similar to hci_create_command 5035 5036 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5037 // dump packet 5038 if (dump) { 5039 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5040 } 5041 5042 // dispatch to all event handlers 5043 btstack_linked_list_iterator_t it; 5044 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5045 while (btstack_linked_list_iterator_has_next(&it)){ 5046 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5047 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5048 } 5049 } 5050 5051 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5052 if (!hci_stack->acl_packet_handler) return; 5053 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5054 } 5055 5056 #ifdef ENABLE_CLASSIC 5057 static void hci_notify_if_sco_can_send_now(void){ 5058 // notify SCO sender if waiting 5059 if (!hci_stack->sco_waiting_for_can_send_now) return; 5060 if (hci_can_send_sco_packet_now()){ 5061 hci_stack->sco_waiting_for_can_send_now = 0; 5062 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5063 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5064 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5065 } 5066 } 5067 5068 // parsing end emitting has been merged to reduce code size 5069 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5070 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5071 5072 uint8_t * eir_data; 5073 ad_context_t context; 5074 const uint8_t * name; 5075 uint8_t name_len; 5076 5077 if (size < 3) return; 5078 5079 int event_type = hci_event_packet_get_type(packet); 5080 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5081 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5082 5083 switch (event_type){ 5084 case HCI_EVENT_INQUIRY_RESULT: 5085 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5086 if (size != (3 + (num_responses * 14))) return; 5087 break; 5088 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5089 if (size != 257) return; 5090 if (num_responses != 1) return; 5091 break; 5092 default: 5093 return; 5094 } 5095 5096 // event[1] is set at the end 5097 int i; 5098 for (i=0; i<num_responses;i++){ 5099 memset(event, 0, sizeof(event)); 5100 event[0] = GAP_EVENT_INQUIRY_RESULT; 5101 uint8_t event_size = 18; // if name is not set by EIR 5102 5103 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5104 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5105 (void)memcpy(&event[9], 5106 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5107 3); // class of device 5108 (void)memcpy(&event[12], 5109 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5110 2); // clock offset 5111 5112 switch (event_type){ 5113 case HCI_EVENT_INQUIRY_RESULT: 5114 // 14,15,16,17 = 0, size 18 5115 break; 5116 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5117 event[14] = 1; 5118 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5119 // 16,17 = 0, size 18 5120 break; 5121 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5122 event[14] = 1; 5123 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5124 // EIR packets only contain a single inquiry response 5125 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5126 name = NULL; 5127 // Iterate over EIR data 5128 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5129 uint8_t data_type = ad_iterator_get_data_type(&context); 5130 uint8_t data_size = ad_iterator_get_data_len(&context); 5131 const uint8_t * data = ad_iterator_get_data(&context); 5132 // Prefer Complete Local Name over Shortened Local Name 5133 switch (data_type){ 5134 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5135 if (name) continue; 5136 /* fall through */ 5137 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5138 name = data; 5139 name_len = data_size; 5140 break; 5141 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5142 if (data_size != 8) break; 5143 event[16] = 1; 5144 memcpy(&event[17], data, 8); 5145 break; 5146 default: 5147 break; 5148 } 5149 } 5150 if (name){ 5151 event[25] = 1; 5152 // truncate name if needed 5153 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5154 event[26] = len; 5155 (void)memcpy(&event[27], name, len); 5156 event_size += len; 5157 } 5158 break; 5159 default: 5160 return; 5161 } 5162 event[1] = event_size - 2; 5163 hci_emit_event(event, event_size, 1); 5164 } 5165 } 5166 #endif 5167 5168 void hci_emit_state(void){ 5169 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5170 uint8_t event[3]; 5171 event[0] = BTSTACK_EVENT_STATE; 5172 event[1] = sizeof(event) - 2u; 5173 event[2] = hci_stack->state; 5174 hci_emit_event(event, sizeof(event), 1); 5175 } 5176 5177 #ifdef ENABLE_CLASSIC 5178 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5179 uint8_t event[13]; 5180 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5181 event[1] = sizeof(event) - 2; 5182 event[2] = status; 5183 little_endian_store_16(event, 3, con_handle); 5184 reverse_bd_addr(address, &event[5]); 5185 event[11] = 1; // ACL connection 5186 event[12] = 0; // encryption disabled 5187 hci_emit_event(event, sizeof(event), 1); 5188 } 5189 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5190 if (disable_l2cap_timeouts) return; 5191 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5192 uint8_t event[4]; 5193 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5194 event[1] = sizeof(event) - 2; 5195 little_endian_store_16(event, 2, conn->con_handle); 5196 hci_emit_event(event, sizeof(event), 1); 5197 } 5198 #endif 5199 5200 #ifdef ENABLE_BLE 5201 #ifdef ENABLE_LE_CENTRAL 5202 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){ 5203 uint8_t event[21]; 5204 event[0] = HCI_EVENT_LE_META; 5205 event[1] = sizeof(event) - 2u; 5206 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5207 event[3] = status; 5208 little_endian_store_16(event, 4, con_handle); 5209 event[6] = 0; // TODO: role 5210 event[7] = address_type; 5211 reverse_bd_addr(address, &event[8]); 5212 little_endian_store_16(event, 14, 0); // interval 5213 little_endian_store_16(event, 16, 0); // latency 5214 little_endian_store_16(event, 18, 0); // supervision timeout 5215 event[20] = 0; // master clock accuracy 5216 hci_emit_event(event, sizeof(event), 1); 5217 } 5218 #endif 5219 #endif 5220 5221 static void hci_emit_transport_packet_sent(void){ 5222 // notify upper stack that it might be possible to send again 5223 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5224 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5225 } 5226 5227 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5228 uint8_t event[6]; 5229 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5230 event[1] = sizeof(event) - 2u; 5231 event[2] = 0; // status = OK 5232 little_endian_store_16(event, 3, con_handle); 5233 event[5] = reason; 5234 hci_emit_event(event, sizeof(event), 1); 5235 } 5236 5237 static void hci_emit_nr_connections_changed(void){ 5238 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5239 uint8_t event[3]; 5240 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5241 event[1] = sizeof(event) - 2u; 5242 event[2] = nr_hci_connections(); 5243 hci_emit_event(event, sizeof(event), 1); 5244 } 5245 5246 static void hci_emit_hci_open_failed(void){ 5247 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5248 uint8_t event[2]; 5249 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5250 event[1] = sizeof(event) - 2u; 5251 hci_emit_event(event, sizeof(event), 1); 5252 } 5253 5254 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5255 log_info("hci_emit_dedicated_bonding_result %u ", status); 5256 uint8_t event[9]; 5257 int pos = 0; 5258 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5259 event[pos++] = sizeof(event) - 2u; 5260 event[pos++] = status; 5261 reverse_bd_addr(address, &event[pos]); 5262 hci_emit_event(event, sizeof(event), 1); 5263 } 5264 5265 5266 #ifdef ENABLE_CLASSIC 5267 5268 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5269 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5270 uint8_t event[5]; 5271 int pos = 0; 5272 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5273 event[pos++] = sizeof(event) - 2; 5274 little_endian_store_16(event, 2, con_handle); 5275 pos += 2; 5276 event[pos++] = level; 5277 hci_emit_event(event, sizeof(event), 1); 5278 } 5279 5280 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5281 if (!connection) return LEVEL_0; 5282 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5283 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5284 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5285 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5286 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5287 // LEVEL 4 always requires 128 bit encrytion key size 5288 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5289 security_level = LEVEL_3; 5290 } 5291 return security_level; 5292 } 5293 5294 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5295 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5296 uint8_t event[3]; 5297 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5298 event[1] = sizeof(event) - 2; 5299 event[2] = enabled; 5300 hci_emit_event(event, sizeof(event), 1); 5301 } 5302 5303 // query if remote side supports eSCO 5304 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5305 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5306 if (!connection) return 0; 5307 return (connection->remote_supported_features[0] & 1) != 0; 5308 } 5309 5310 static bool hci_ssp_supported(hci_connection_t * connection){ 5311 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5312 return (connection->bonding_flags & mask) == mask; 5313 } 5314 5315 // query if remote side supports SSP 5316 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5317 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5318 if (!connection) return 0; 5319 return hci_ssp_supported(connection) ? 1 : 0; 5320 } 5321 5322 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5323 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5324 } 5325 5326 // GAP API 5327 /** 5328 * @bbrief enable/disable bonding. default is enabled 5329 * @praram enabled 5330 */ 5331 void gap_set_bondable_mode(int enable){ 5332 hci_stack->bondable = enable ? 1 : 0; 5333 } 5334 /** 5335 * @brief Get bondable mode. 5336 * @return 1 if bondable 5337 */ 5338 int gap_get_bondable_mode(void){ 5339 return hci_stack->bondable; 5340 } 5341 5342 /** 5343 * @brief map link keys to security levels 5344 */ 5345 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5346 switch (link_key_type){ 5347 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5348 return LEVEL_4; 5349 case COMBINATION_KEY: 5350 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5351 return LEVEL_3; 5352 default: 5353 return LEVEL_2; 5354 } 5355 } 5356 5357 /** 5358 * @brief map link keys to secure connection yes/no 5359 */ 5360 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5361 switch (link_key_type){ 5362 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5363 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5364 return 1; 5365 default: 5366 return 0; 5367 } 5368 } 5369 5370 /** 5371 * @brief map link keys to authenticated 5372 */ 5373 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5374 switch (link_key_type){ 5375 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5376 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5377 return 1; 5378 default: 5379 return 0; 5380 } 5381 } 5382 5383 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5384 log_info("gap_mitm_protection_required_for_security_level %u", level); 5385 return level > LEVEL_2; 5386 } 5387 5388 /** 5389 * @brief get current security level 5390 */ 5391 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5392 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5393 if (!connection) return LEVEL_0; 5394 return gap_security_level_for_connection(connection); 5395 } 5396 5397 /** 5398 * @brief request connection to device to 5399 * @result GAP_AUTHENTICATION_RESULT 5400 */ 5401 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5402 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5403 if (!connection){ 5404 hci_emit_security_level(con_handle, LEVEL_0); 5405 return; 5406 } 5407 5408 btstack_assert(hci_is_le_connection(connection) == false); 5409 5410 gap_security_level_t current_level = gap_security_level(con_handle); 5411 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5412 requested_level, connection->requested_security_level, current_level); 5413 5414 // authentication already active if planned level > 0 5415 if (connection->requested_security_level > LEVEL_0){ 5416 // authentication already active 5417 if (connection->requested_security_level < requested_level){ 5418 // increase requested level as new level is higher 5419 // TODO: handle re-authentication when done 5420 connection->requested_security_level = requested_level; 5421 } 5422 } else { 5423 // no request active, notify if security sufficient 5424 if (requested_level <= current_level){ 5425 hci_emit_security_level(con_handle, current_level); 5426 return; 5427 } 5428 5429 // store request 5430 connection->requested_security_level = requested_level; 5431 5432 // start to authenticate connection 5433 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5434 hci_run(); 5435 } 5436 } 5437 5438 /** 5439 * @brief start dedicated bonding with device. disconnect after bonding 5440 * @param device 5441 * @param request MITM protection 5442 * @result GAP_DEDICATED_BONDING_COMPLETE 5443 */ 5444 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5445 5446 // create connection state machine 5447 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5448 5449 if (!connection){ 5450 return BTSTACK_MEMORY_ALLOC_FAILED; 5451 } 5452 5453 // delete linkn key 5454 gap_drop_link_key_for_bd_addr(device); 5455 5456 // configure LEVEL_2/3, dedicated bonding 5457 connection->state = SEND_CREATE_CONNECTION; 5458 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5459 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5460 connection->bonding_flags = BONDING_DEDICATED; 5461 5462 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5463 5464 // handle: connnection failure (connection complete != ok) 5465 // handle: authentication failure 5466 // handle: disconnect on done 5467 5468 hci_run(); 5469 5470 return 0; 5471 } 5472 #endif 5473 5474 void gap_set_local_name(const char * local_name){ 5475 hci_stack->local_name = local_name; 5476 } 5477 5478 5479 #ifdef ENABLE_BLE 5480 5481 #ifdef ENABLE_LE_CENTRAL 5482 void gap_start_scan(void){ 5483 hci_stack->le_scanning_enabled = true; 5484 hci_run(); 5485 } 5486 5487 void gap_stop_scan(void){ 5488 hci_stack->le_scanning_enabled = false; 5489 hci_run(); 5490 } 5491 5492 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5493 hci_stack->le_scan_type = scan_type; 5494 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5495 hci_stack->le_scan_interval = scan_interval; 5496 hci_stack->le_scan_window = scan_window; 5497 hci_stack->le_scanning_param_update = true; 5498 hci_run(); 5499 } 5500 5501 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5502 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5503 } 5504 5505 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5506 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5507 if (!conn){ 5508 // disallow if le connection is already outgoing 5509 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5510 log_error("le connection already active"); 5511 return ERROR_CODE_COMMAND_DISALLOWED; 5512 } 5513 5514 log_info("gap_connect: no connection exists yet, creating context"); 5515 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5516 if (!conn){ 5517 // notify client that alloc failed 5518 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5519 log_info("gap_connect: failed to alloc hci_connection_t"); 5520 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5521 } 5522 5523 // set le connecting state 5524 if (hci_is_le_connection_type(addr_type)){ 5525 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5526 } 5527 5528 conn->state = SEND_CREATE_CONNECTION; 5529 log_info("gap_connect: send create connection next"); 5530 hci_run(); 5531 return ERROR_CODE_SUCCESS; 5532 } 5533 5534 if (!hci_is_le_connection(conn) || 5535 (conn->state == SEND_CREATE_CONNECTION) || 5536 (conn->state == SENT_CREATE_CONNECTION)) { 5537 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5538 log_error("gap_connect: classic connection or connect is already being created"); 5539 return GATT_CLIENT_IN_WRONG_STATE; 5540 } 5541 5542 // check if connection was just disconnected 5543 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5544 log_info("gap_connect: send create connection (again)"); 5545 conn->state = SEND_CREATE_CONNECTION; 5546 hci_run(); 5547 return ERROR_CODE_SUCCESS; 5548 } 5549 5550 log_info("gap_connect: context exists with state %u", conn->state); 5551 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5552 hci_run(); 5553 return ERROR_CODE_SUCCESS; 5554 } 5555 5556 // @assumption: only a single outgoing LE Connection exists 5557 static hci_connection_t * gap_get_outgoing_connection(void){ 5558 btstack_linked_item_t *it; 5559 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5560 hci_connection_t * conn = (hci_connection_t *) it; 5561 if (!hci_is_le_connection(conn)) continue; 5562 switch (conn->state){ 5563 case SEND_CREATE_CONNECTION: 5564 case SENT_CREATE_CONNECTION: 5565 case SENT_CANCEL_CONNECTION: 5566 return conn; 5567 default: 5568 break; 5569 }; 5570 } 5571 return NULL; 5572 } 5573 5574 uint8_t gap_connect_cancel(void){ 5575 hci_connection_t * conn = gap_get_outgoing_connection(); 5576 if (!conn) return 0; 5577 switch (conn->state){ 5578 case SEND_CREATE_CONNECTION: 5579 // skip sending create connection and emit event instead 5580 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5581 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5582 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5583 btstack_memory_hci_connection_free( conn ); 5584 break; 5585 case SENT_CREATE_CONNECTION: 5586 // request to send cancel connection 5587 conn->state = SEND_CANCEL_CONNECTION; 5588 hci_run(); 5589 break; 5590 default: 5591 break; 5592 } 5593 return 0; 5594 } 5595 #endif 5596 5597 #ifdef ENABLE_LE_CENTRAL 5598 /** 5599 * @brief Set connection parameters for outgoing connections 5600 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5601 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5602 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5603 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5604 * @param conn_latency, default: 4 5605 * @param supervision_timeout (unit: 10ms), default: 720 ms 5606 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5607 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5608 */ 5609 5610 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5611 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5612 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5613 hci_stack->le_connection_scan_interval = conn_scan_interval; 5614 hci_stack->le_connection_scan_window = conn_scan_window; 5615 hci_stack->le_connection_interval_min = conn_interval_min; 5616 hci_stack->le_connection_interval_max = conn_interval_max; 5617 hci_stack->le_connection_latency = conn_latency; 5618 hci_stack->le_supervision_timeout = supervision_timeout; 5619 hci_stack->le_minimum_ce_length = min_ce_length; 5620 hci_stack->le_maximum_ce_length = max_ce_length; 5621 } 5622 #endif 5623 5624 /** 5625 * @brief Updates the connection parameters for a given LE connection 5626 * @param handle 5627 * @param conn_interval_min (unit: 1.25ms) 5628 * @param conn_interval_max (unit: 1.25ms) 5629 * @param conn_latency 5630 * @param supervision_timeout (unit: 10ms) 5631 * @returns 0 if ok 5632 */ 5633 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5634 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5635 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5636 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5637 connection->le_conn_interval_min = conn_interval_min; 5638 connection->le_conn_interval_max = conn_interval_max; 5639 connection->le_conn_latency = conn_latency; 5640 connection->le_supervision_timeout = supervision_timeout; 5641 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5642 hci_run(); 5643 return 0; 5644 } 5645 5646 /** 5647 * @brief Request an update of the connection parameter for a given LE connection 5648 * @param handle 5649 * @param conn_interval_min (unit: 1.25ms) 5650 * @param conn_interval_max (unit: 1.25ms) 5651 * @param conn_latency 5652 * @param supervision_timeout (unit: 10ms) 5653 * @returns 0 if ok 5654 */ 5655 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5656 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5657 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5658 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5659 connection->le_conn_interval_min = conn_interval_min; 5660 connection->le_conn_interval_max = conn_interval_max; 5661 connection->le_conn_latency = conn_latency; 5662 connection->le_supervision_timeout = supervision_timeout; 5663 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5664 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5665 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5666 return 0; 5667 } 5668 5669 #ifdef ENABLE_LE_PERIPHERAL 5670 5671 /** 5672 * @brief Set Advertisement Data 5673 * @param advertising_data_length 5674 * @param advertising_data (max 31 octets) 5675 * @note data is not copied, pointer has to stay valid 5676 */ 5677 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5678 hci_stack->le_advertisements_data_len = advertising_data_length; 5679 hci_stack->le_advertisements_data = advertising_data; 5680 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5681 hci_run(); 5682 } 5683 5684 /** 5685 * @brief Set Scan Response Data 5686 * @param advertising_data_length 5687 * @param advertising_data (max 31 octets) 5688 * @note data is not copied, pointer has to stay valid 5689 */ 5690 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5691 hci_stack->le_scan_response_data_len = scan_response_data_length; 5692 hci_stack->le_scan_response_data = scan_response_data; 5693 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5694 hci_run(); 5695 } 5696 5697 /** 5698 * @brief Set Advertisement Parameters 5699 * @param adv_int_min 5700 * @param adv_int_max 5701 * @param adv_type 5702 * @param direct_address_type 5703 * @param direct_address 5704 * @param channel_map 5705 * @param filter_policy 5706 * 5707 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5708 */ 5709 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5710 uint8_t direct_address_typ, bd_addr_t direct_address, 5711 uint8_t channel_map, uint8_t filter_policy) { 5712 5713 hci_stack->le_advertisements_interval_min = adv_int_min; 5714 hci_stack->le_advertisements_interval_max = adv_int_max; 5715 hci_stack->le_advertisements_type = adv_type; 5716 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5717 hci_stack->le_advertisements_channel_map = channel_map; 5718 hci_stack->le_advertisements_filter_policy = filter_policy; 5719 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5720 6); 5721 5722 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 5723 hci_run(); 5724 } 5725 5726 /** 5727 * @brief Enable/Disable Advertisements 5728 * @param enabled 5729 */ 5730 void gap_advertisements_enable(int enabled){ 5731 hci_stack->le_advertisements_enabled = enabled != 0; 5732 hci_update_advertisements_enabled_for_current_roles(); 5733 hci_run(); 5734 } 5735 5736 #endif 5737 5738 void hci_le_set_own_address_type(uint8_t own_address_type){ 5739 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5740 if (own_address_type == hci_stack->le_own_addr_type) return; 5741 hci_stack->le_own_addr_type = own_address_type; 5742 5743 #ifdef ENABLE_LE_PERIPHERAL 5744 // update advertisement parameters, too 5745 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5746 hci_run(); 5747 #endif 5748 #ifdef ENABLE_LE_CENTRAL 5749 // note: we don't update scan parameters or modify ongoing connection attempts 5750 #endif 5751 } 5752 5753 #endif 5754 5755 uint8_t gap_disconnect(hci_con_handle_t handle){ 5756 hci_connection_t * conn = hci_connection_for_handle(handle); 5757 if (!conn){ 5758 hci_emit_disconnection_complete(handle, 0); 5759 return 0; 5760 } 5761 // ignore if already disconnected 5762 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5763 return 0; 5764 } 5765 conn->state = SEND_DISCONNECT; 5766 hci_run(); 5767 return 0; 5768 } 5769 5770 int gap_read_rssi(hci_con_handle_t con_handle){ 5771 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5772 if (hci_connection == NULL) return 0; 5773 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5774 hci_run(); 5775 return 1; 5776 } 5777 5778 /** 5779 * @brief Get connection type 5780 * @param con_handle 5781 * @result connection_type 5782 */ 5783 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5784 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5785 if (!conn) return GAP_CONNECTION_INVALID; 5786 switch (conn->address_type){ 5787 case BD_ADDR_TYPE_LE_PUBLIC: 5788 case BD_ADDR_TYPE_LE_RANDOM: 5789 return GAP_CONNECTION_LE; 5790 case BD_ADDR_TYPE_SCO: 5791 return GAP_CONNECTION_SCO; 5792 case BD_ADDR_TYPE_ACL: 5793 return GAP_CONNECTION_ACL; 5794 default: 5795 return GAP_CONNECTION_INVALID; 5796 } 5797 } 5798 5799 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5800 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5801 if (!conn) return HCI_ROLE_INVALID; 5802 return (hci_role_t) conn->role; 5803 } 5804 5805 5806 #ifdef ENABLE_CLASSIC 5807 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5808 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5809 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5810 conn->request_role = role; 5811 hci_run(); 5812 return ERROR_CODE_SUCCESS; 5813 } 5814 #endif 5815 5816 #ifdef ENABLE_BLE 5817 5818 uint8_t gap_le_set_phy(hci_con_handle_t con_handle, uint8_t all_phys, uint8_t tx_phys, uint8_t rx_phys, uint8_t phy_options){ 5819 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5820 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5821 5822 conn->le_phy_update_all_phys = all_phys; 5823 conn->le_phy_update_tx_phys = tx_phys; 5824 conn->le_phy_update_rx_phys = rx_phys; 5825 conn->le_phy_update_phy_options = phy_options; 5826 5827 hci_run(); 5828 5829 return 0; 5830 } 5831 5832 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5833 // check if already in list 5834 btstack_linked_list_iterator_t it; 5835 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5836 while (btstack_linked_list_iterator_has_next(&it)) { 5837 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5838 if (entry->address_type != address_type) { 5839 continue; 5840 } 5841 if (memcmp(entry->address, address, 6) != 0) { 5842 continue; 5843 } 5844 // disallow if already scheduled to add 5845 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5846 return ERROR_CODE_COMMAND_DISALLOWED; 5847 } 5848 // still on controller, but scheduled to remove -> re-add 5849 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5850 return ERROR_CODE_SUCCESS; 5851 } 5852 // alloc and add to list 5853 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5854 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5855 entry->address_type = address_type; 5856 (void)memcpy(entry->address, address, 6); 5857 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5858 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5859 return ERROR_CODE_SUCCESS; 5860 } 5861 5862 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5863 btstack_linked_list_iterator_t it; 5864 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5865 while (btstack_linked_list_iterator_has_next(&it)){ 5866 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5867 if (entry->address_type != address_type) { 5868 continue; 5869 } 5870 if (memcmp(entry->address, address, 6) != 0) { 5871 continue; 5872 } 5873 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5874 // remove from controller if already present 5875 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5876 } else { 5877 // directly remove entry from whitelist 5878 btstack_linked_list_iterator_remove(&it); 5879 btstack_memory_whitelist_entry_free(entry); 5880 } 5881 return ERROR_CODE_SUCCESS; 5882 } 5883 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5884 } 5885 5886 static void hci_whitelist_clear(void){ 5887 btstack_linked_list_iterator_t it; 5888 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5889 while (btstack_linked_list_iterator_has_next(&it)){ 5890 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5891 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5892 // remove from controller if already present 5893 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5894 continue; 5895 } 5896 // directly remove entry from whitelist 5897 btstack_linked_list_iterator_remove(&it); 5898 btstack_memory_whitelist_entry_free(entry); 5899 } 5900 } 5901 5902 /** 5903 * @brief Clear Whitelist 5904 * @returns 0 if ok 5905 */ 5906 uint8_t gap_whitelist_clear(void){ 5907 hci_whitelist_clear(); 5908 hci_run(); 5909 return ERROR_CODE_SUCCESS; 5910 } 5911 5912 /** 5913 * @brief Add Device to Whitelist 5914 * @param address_typ 5915 * @param address 5916 * @returns 0 if ok 5917 */ 5918 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5919 uint8_t status = hci_whitelist_add(address_type, address); 5920 if (status){ 5921 return status; 5922 } 5923 hci_run(); 5924 return ERROR_CODE_SUCCESS; 5925 } 5926 5927 /** 5928 * @brief Remove Device from Whitelist 5929 * @param address_typ 5930 * @param address 5931 * @returns 0 if ok 5932 */ 5933 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5934 uint8_t status = hci_whitelist_remove(address_type, address); 5935 if (status){ 5936 return status; 5937 } 5938 hci_run(); 5939 return ERROR_CODE_SUCCESS; 5940 } 5941 5942 #ifdef ENABLE_LE_CENTRAL 5943 /** 5944 * @brief Connect with Whitelist 5945 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 5946 * @returns - if ok 5947 */ 5948 uint8_t gap_connect_with_whitelist(void){ 5949 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5950 return ERROR_CODE_COMMAND_DISALLOWED; 5951 } 5952 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5953 hci_run(); 5954 return ERROR_CODE_SUCCESS; 5955 } 5956 5957 /** 5958 * @brief Auto Connection Establishment - Start Connecting to device 5959 * @param address_typ 5960 * @param address 5961 * @returns 0 if ok 5962 */ 5963 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 5964 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5965 return ERROR_CODE_COMMAND_DISALLOWED; 5966 } 5967 5968 uint8_t status = hci_whitelist_add(address_type, address); 5969 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 5970 return status; 5971 } 5972 5973 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5974 5975 hci_run(); 5976 return ERROR_CODE_SUCCESS; 5977 } 5978 5979 /** 5980 * @brief Auto Connection Establishment - Stop Connecting to device 5981 * @param address_typ 5982 * @param address 5983 * @returns 0 if ok 5984 */ 5985 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 5986 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5987 return ERROR_CODE_COMMAND_DISALLOWED; 5988 } 5989 5990 hci_whitelist_remove(address_type, address); 5991 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 5992 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5993 } 5994 hci_run(); 5995 return 0; 5996 } 5997 5998 /** 5999 * @brief Auto Connection Establishment - Stop everything 6000 * @note Convenience function to stop all active auto connection attempts 6001 */ 6002 uint8_t gap_auto_connection_stop_all(void){ 6003 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6004 return ERROR_CODE_COMMAND_DISALLOWED; 6005 } 6006 hci_whitelist_clear(); 6007 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6008 hci_run(); 6009 return ERROR_CODE_SUCCESS; 6010 } 6011 6012 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6013 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6014 if (!conn) return 0; 6015 return conn->le_connection_interval; 6016 } 6017 #endif 6018 #endif 6019 6020 #ifdef ENABLE_CLASSIC 6021 /** 6022 * @brief Set Extended Inquiry Response data 6023 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6024 * @note has to be done before stack starts up 6025 */ 6026 void gap_set_extended_inquiry_response(const uint8_t * data){ 6027 hci_stack->eir_data = data; 6028 } 6029 6030 /** 6031 * @brief Start GAP Classic Inquiry 6032 * @param duration in 1.28s units 6033 * @return 0 if ok 6034 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6035 */ 6036 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6037 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6038 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6039 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6040 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6041 } 6042 hci_stack->inquiry_state = duration_in_1280ms_units; 6043 hci_run(); 6044 return 0; 6045 } 6046 6047 /** 6048 * @brief Stop GAP Classic Inquiry 6049 * @returns 0 if ok 6050 */ 6051 int gap_inquiry_stop(void){ 6052 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6053 // emit inquiry complete event, before it even started 6054 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6055 hci_emit_event(event, sizeof(event), 1); 6056 return 0; 6057 } 6058 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6059 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6060 hci_run(); 6061 return 0; 6062 } 6063 6064 void gap_inquiry_set_lap(uint32_t lap){ 6065 hci_stack->inquiry_lap = lap; 6066 } 6067 6068 6069 /** 6070 * @brief Remote Name Request 6071 * @param addr 6072 * @param page_scan_repetition_mode 6073 * @param clock_offset only used when bit 15 is set 6074 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6075 */ 6076 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6077 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6078 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6079 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6080 hci_stack->remote_name_clock_offset = clock_offset; 6081 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6082 hci_run(); 6083 return 0; 6084 } 6085 6086 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6087 hci_stack->gap_pairing_state = state; 6088 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6089 hci_run(); 6090 return 0; 6091 } 6092 6093 /** 6094 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6095 * @param addr 6096 * @param pin_data 6097 * @param pin_len 6098 * @return 0 if ok 6099 */ 6100 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6101 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6102 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6103 hci_stack->gap_pairing_pin_len = pin_len; 6104 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6105 } 6106 6107 /** 6108 * @brief Legacy Pairing Pin Code Response 6109 * @param addr 6110 * @param pin 6111 * @return 0 if ok 6112 */ 6113 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6114 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6115 } 6116 6117 /** 6118 * @brief Abort Legacy Pairing 6119 * @param addr 6120 * @param pin 6121 * @return 0 if ok 6122 */ 6123 int gap_pin_code_negative(bd_addr_t addr){ 6124 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6125 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6126 } 6127 6128 /** 6129 * @brief SSP Passkey Response 6130 * @param addr 6131 * @param passkey 6132 * @return 0 if ok 6133 */ 6134 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6135 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6136 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6137 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6138 } 6139 6140 /** 6141 * @brief Abort SSP Passkey Entry/Pairing 6142 * @param addr 6143 * @param pin 6144 * @return 0 if ok 6145 */ 6146 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6147 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6148 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6149 } 6150 6151 /** 6152 * @brief Accept SSP Numeric Comparison 6153 * @param addr 6154 * @param passkey 6155 * @return 0 if ok 6156 */ 6157 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6158 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6159 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6160 } 6161 6162 /** 6163 * @brief Abort SSP Numeric Comparison/Pairing 6164 * @param addr 6165 * @param pin 6166 * @return 0 if ok 6167 */ 6168 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6169 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6170 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6171 } 6172 6173 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6174 6175 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6176 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6177 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6178 connectionSetAuthenticationFlags(conn, flag); 6179 hci_run(); 6180 return ERROR_CODE_SUCCESS; 6181 } 6182 6183 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6184 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_REPLY); 6185 } 6186 6187 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6188 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6189 } 6190 #endif 6191 6192 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6193 /** 6194 * @brief Report Remote OOB Data 6195 * @param bd_addr 6196 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6197 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6198 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6199 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6200 */ 6201 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){ 6202 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6203 if (connection == NULL) { 6204 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6205 } 6206 connection->classic_oob_c_192 = c_192; 6207 connection->classic_oob_r_192 = r_192; 6208 connection->classic_oob_c_256 = c_256; 6209 connection->classic_oob_r_256 = r_256; 6210 return ERROR_CODE_SUCCESS; 6211 } 6212 /** 6213 * @brief Generate new OOB data 6214 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6215 */ 6216 void gap_ssp_generate_oob_data(void){ 6217 hci_stack->classic_read_local_oob_data = true; 6218 hci_run(); 6219 } 6220 6221 #endif 6222 6223 /** 6224 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6225 * @param inquiry_mode see bluetooth_defines.h 6226 */ 6227 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6228 hci_stack->inquiry_mode = inquiry_mode; 6229 } 6230 6231 /** 6232 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6233 */ 6234 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6235 hci_stack->sco_voice_setting = voice_setting; 6236 } 6237 6238 /** 6239 * @brief Get SCO Voice Setting 6240 * @return current voice setting 6241 */ 6242 uint16_t hci_get_sco_voice_setting(void){ 6243 return hci_stack->sco_voice_setting; 6244 } 6245 6246 static int hci_have_usb_transport(void){ 6247 if (!hci_stack->hci_transport) return 0; 6248 const char * transport_name = hci_stack->hci_transport->name; 6249 if (!transport_name) return 0; 6250 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6251 } 6252 6253 /** @brief Get SCO packet length for current SCO Voice setting 6254 * @note Using SCO packets of the exact length is required for USB transfer 6255 * @return Length of SCO packets in bytes (not audio frames) 6256 */ 6257 int hci_get_sco_packet_length(void){ 6258 int sco_packet_length = 0; 6259 6260 #ifdef ENABLE_SCO_OVER_HCI 6261 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6262 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6263 6264 if (hci_have_usb_transport()){ 6265 // see Core Spec for H2 USB Transfer. 6266 // 3 byte SCO header + 24 bytes per connection 6267 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6268 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6269 } else { 6270 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6271 sco_packet_length = 3 + 60 * multiplier; 6272 // assert that it still fits inside an SCO buffer 6273 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6274 sco_packet_length = 3 + 60; 6275 } 6276 } 6277 #endif 6278 6279 #ifdef HAVE_SCO_TRANSPORT 6280 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6281 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6282 sco_packet_length = 3 + 60 * multiplier; 6283 #endif 6284 return sco_packet_length; 6285 } 6286 6287 /** 6288 * @brief Sets the master/slave policy 6289 * @param policy (0: attempt to become master, 1: let connecting device decide) 6290 */ 6291 void hci_set_master_slave_policy(uint8_t policy){ 6292 hci_stack->master_slave_policy = policy; 6293 } 6294 6295 #endif 6296 6297 HCI_STATE hci_get_state(void){ 6298 return hci_stack->state; 6299 } 6300 6301 #ifdef ENABLE_CLASSIC 6302 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6303 hci_stack->gap_classic_accept_callback = accept_callback; 6304 } 6305 #endif 6306 6307 /** 6308 * @brief Set callback for Bluetooth Hardware Error 6309 */ 6310 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6311 hci_stack->hardware_error_callback = fn; 6312 } 6313 6314 void hci_disconnect_all(void){ 6315 btstack_linked_list_iterator_t it; 6316 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6317 while (btstack_linked_list_iterator_has_next(&it)){ 6318 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6319 if (con->state == SENT_DISCONNECT) continue; 6320 con->state = SEND_DISCONNECT; 6321 } 6322 hci_run(); 6323 } 6324 6325 uint16_t hci_get_manufacturer(void){ 6326 return hci_stack->manufacturer; 6327 } 6328 6329 #ifdef ENABLE_BLE 6330 6331 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6332 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6333 if (!hci_con) return NULL; 6334 return &hci_con->sm_connection; 6335 } 6336 6337 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6338 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6339 6340 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6341 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6342 if (hci_connection == NULL) return 0; 6343 if (hci_is_le_connection(hci_connection)){ 6344 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6345 if (sm_conn->sm_connection_encrypted) { 6346 return sm_conn->sm_actual_encryption_key_size; 6347 } 6348 } 6349 #ifdef ENABLE_CLASSIC 6350 else { 6351 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 6352 return hci_connection->encryption_key_size; 6353 } 6354 } 6355 #endif 6356 return 0; 6357 } 6358 6359 int gap_authenticated(hci_con_handle_t con_handle){ 6360 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6361 if (hci_connection == NULL) return 0; 6362 6363 switch (hci_connection->address_type){ 6364 case BD_ADDR_TYPE_LE_PUBLIC: 6365 case BD_ADDR_TYPE_LE_RANDOM: 6366 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6367 return hci_connection->sm_connection.sm_connection_authenticated; 6368 #ifdef ENABLE_CLASSIC 6369 case BD_ADDR_TYPE_SCO: 6370 case BD_ADDR_TYPE_ACL: 6371 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6372 #endif 6373 default: 6374 return 0; 6375 } 6376 } 6377 6378 int gap_secure_connection(hci_con_handle_t con_handle){ 6379 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6380 if (hci_connection == NULL) return 0; 6381 6382 switch (hci_connection->address_type){ 6383 case BD_ADDR_TYPE_LE_PUBLIC: 6384 case BD_ADDR_TYPE_LE_RANDOM: 6385 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6386 return hci_connection->sm_connection.sm_connection_sc; 6387 #ifdef ENABLE_CLASSIC 6388 case BD_ADDR_TYPE_SCO: 6389 case BD_ADDR_TYPE_ACL: 6390 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6391 #endif 6392 default: 6393 return 0; 6394 } 6395 } 6396 6397 bool gap_bonded(hci_con_handle_t con_handle){ 6398 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6399 if (hci_connection == NULL) return 0; 6400 6401 #ifdef ENABLE_CLASSIC 6402 link_key_t link_key; 6403 link_key_type_t link_key_type; 6404 #endif 6405 switch (hci_connection->address_type){ 6406 case BD_ADDR_TYPE_LE_PUBLIC: 6407 case BD_ADDR_TYPE_LE_RANDOM: 6408 return hci_connection->sm_connection.sm_le_db_index >= 0; 6409 #ifdef ENABLE_CLASSIC 6410 case BD_ADDR_TYPE_SCO: 6411 case BD_ADDR_TYPE_ACL: 6412 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6413 #endif 6414 default: 6415 return false; 6416 } 6417 } 6418 6419 6420 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6421 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6422 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6423 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6424 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6425 return sm_conn->sm_connection_authorization_state; 6426 } 6427 #endif 6428 6429 #ifdef ENABLE_CLASSIC 6430 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){ 6431 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6432 if (!conn) return GAP_CONNECTION_INVALID; 6433 conn->sniff_min_interval = sniff_min_interval; 6434 conn->sniff_max_interval = sniff_max_interval; 6435 conn->sniff_attempt = sniff_attempt; 6436 conn->sniff_timeout = sniff_timeout; 6437 hci_run(); 6438 return 0; 6439 } 6440 6441 /** 6442 * @brief Exit Sniff mode 6443 * @param con_handle 6444 @ @return 0 if ok 6445 */ 6446 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6447 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6448 if (!conn) return GAP_CONNECTION_INVALID; 6449 conn->sniff_min_interval = 0xffff; 6450 hci_run(); 6451 return 0; 6452 } 6453 6454 uint8_t gap_sniff_subrating_configure(hci_con_handle_t con_handle, uint16_t max_latency, uint16_t min_remote_timeout, uint16_t min_local_timeout){ 6455 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6456 if (!conn) return GAP_CONNECTION_INVALID; 6457 conn->sniff_subrating_max_latency = max_latency; 6458 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6459 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6460 hci_run(); 6461 return ERROR_CODE_SUCCESS; 6462 } 6463 6464 uint8_t gap_qos_set(hci_con_handle_t con_handle, hci_service_type_t service_type, uint32_t token_rate, uint32_t peak_bandwidth, uint32_t latency, uint32_t delay_variation){ 6465 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6466 if (!conn) return GAP_CONNECTION_INVALID; 6467 conn->qos_service_type = service_type; 6468 conn->qos_token_rate = token_rate; 6469 conn->qos_peak_bandwidth = peak_bandwidth; 6470 conn->qos_latency = latency; 6471 conn->qos_delay_variation = delay_variation; 6472 hci_run(); 6473 return ERROR_CODE_SUCCESS; 6474 } 6475 6476 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6477 hci_stack->new_page_scan_interval = page_scan_interval; 6478 hci_stack->new_page_scan_window = page_scan_window; 6479 hci_run(); 6480 } 6481 6482 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6483 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6484 hci_run(); 6485 } 6486 6487 #endif 6488 6489 void hci_halting_defer(void){ 6490 if (hci_stack->state != HCI_STATE_HALTING) return; 6491 switch (hci_stack->substate){ 6492 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6493 case HCI_HALTING_CLOSE: 6494 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6495 break; 6496 default: 6497 break; 6498 } 6499 } 6500 6501 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6502 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6503 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6504 if (le_device_db_index >= le_device_db_max_count()) return; 6505 uint8_t offset = le_device_db_index >> 3; 6506 uint8_t mask = 1 << (le_device_db_index & 7); 6507 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6508 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6509 // note: go back to remove entries, otherwise, a remove + add will skip the add 6510 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6511 } 6512 } 6513 6514 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6515 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6516 if (le_device_db_index >= le_device_db_max_count()) return; 6517 uint8_t offset = le_device_db_index >> 3; 6518 uint8_t mask = 1 << (le_device_db_index & 7); 6519 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6520 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6521 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6522 } 6523 } 6524 6525 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6526 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6527 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6528 } 6529 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6530 // restart le resolving list update 6531 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6532 } 6533 return ERROR_CODE_SUCCESS; 6534 } 6535 #endif 6536 6537 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6538 void hci_setup_test_connections_fuzz(void){ 6539 hci_connection_t * conn; 6540 6541 // default address: 66:55:44:33:00:01 6542 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6543 6544 // setup Controller info 6545 hci_stack->num_cmd_packets = 255; 6546 hci_stack->acl_packets_total_num = 255; 6547 6548 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6549 addr[5] = 0x01; 6550 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6551 conn->con_handle = addr[5]; 6552 conn->role = HCI_ROLE_SLAVE; 6553 conn->state = RECEIVED_CONNECTION_REQUEST; 6554 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6555 6556 // setup incoming Classic SCO connection with con handle 0x0002 6557 addr[5] = 0x02; 6558 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6559 conn->con_handle = addr[5]; 6560 conn->role = HCI_ROLE_SLAVE; 6561 conn->state = RECEIVED_CONNECTION_REQUEST; 6562 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6563 6564 // setup ready Classic ACL connection with con handle 0x0003 6565 addr[5] = 0x03; 6566 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6567 conn->con_handle = addr[5]; 6568 conn->role = HCI_ROLE_SLAVE; 6569 conn->state = OPEN; 6570 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6571 6572 // setup ready Classic SCO connection with con handle 0x0004 6573 addr[5] = 0x04; 6574 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6575 conn->con_handle = addr[5]; 6576 conn->role = HCI_ROLE_SLAVE; 6577 conn->state = OPEN; 6578 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6579 6580 // setup ready LE ACL connection with con handle 0x005 and public address 6581 addr[5] = 0x05; 6582 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6583 conn->con_handle = addr[5]; 6584 conn->role = HCI_ROLE_SLAVE; 6585 conn->state = OPEN; 6586 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6587 conn->sm_connection.sm_connection_encrypted = 1; 6588 } 6589 6590 void hci_free_connections_fuzz(void){ 6591 btstack_linked_list_iterator_t it; 6592 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6593 while (btstack_linked_list_iterator_has_next(&it)){ 6594 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6595 btstack_linked_list_iterator_remove(&it); 6596 btstack_memory_hci_connection_free(con); 6597 } 6598 } 6599 void hci_simulate_working_fuzz(void){ 6600 hci_init_done(); 6601 hci_stack->num_cmd_packets = 255; 6602 } 6603 #endif 6604