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 static bool hci_pairing_active(hci_connection_t * hci_connection){ 395 return (hci_connection->authentication_flags & PAIRING_ACTIVE_MASK) != 0; 396 } 397 398 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 399 if (hci_pairing_active(hci_connection)) return; 400 if (ssp){ 401 hci_connection->authentication_flags |= SSP_PAIRING_ACTIVE; 402 } else { 403 hci_connection->authentication_flags |= LEGACY_PAIRING_ACTIVE; 404 } 405 // if we are initiator, we have sent an HCI Authenticate Request 406 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 407 408 log_info("pairing started, ssp %u, initiator %u", (int) ssp, (int) initiator); 409 410 uint8_t event[12]; 411 event[0] = GAP_EVENT_PAIRING_STARTED; 412 event[1] = 10; 413 reverse_bd_addr(hci_connection->address, &event[2]); 414 little_endian_store_16(event, 8, (uint16_t) hci_connection->con_handle); 415 event[10] = (uint8_t) ssp; 416 event[11] = (uint8_t) initiator; 417 hci_emit_event(event, sizeof(event), 1); 418 } 419 420 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 421 if (!hci_pairing_active(hci_connection)) return; 422 hci_connection->authentication_flags &= ~PAIRING_ACTIVE_MASK; 423 log_info("pairing complete, status %02x", status); 424 425 uint8_t event[12]; 426 event[0] = GAP_EVENT_PAIRING_COMPLETE; 427 event[1] = 9; 428 reverse_bd_addr(hci_connection->address, &event[2]); 429 little_endian_store_16(event, 8, (uint16_t) hci_connection->con_handle); 430 event[10] = status; 431 hci_emit_event(event, sizeof(event), 1); 432 } 433 434 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 435 hci_connection_t * conn = hci_connection_for_handle(handle); 436 if (!conn) return 0; 437 return (int) hci_pairing_active(conn); 438 } 439 440 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 441 if (!hci_stack->link_key_db) return; 442 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 443 hci_stack->link_key_db->delete_link_key(addr); 444 } 445 446 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 447 if (!hci_stack->link_key_db) return; 448 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 449 hci_stack->link_key_db->put_link_key(addr, link_key, type); 450 } 451 452 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 453 if (!hci_stack->link_key_db) return false; 454 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 455 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 456 return result; 457 } 458 459 void gap_delete_all_link_keys(void){ 460 bd_addr_t addr; 461 link_key_t link_key; 462 link_key_type_t type; 463 btstack_link_key_iterator_t it; 464 int ok = gap_link_key_iterator_init(&it); 465 if (!ok) { 466 log_error("could not initialize iterator"); 467 return; 468 } 469 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 470 gap_drop_link_key_for_bd_addr(addr); 471 } 472 gap_link_key_iterator_done(&it); 473 } 474 475 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 476 if (!hci_stack->link_key_db) return 0; 477 if (!hci_stack->link_key_db->iterator_init) return 0; 478 return hci_stack->link_key_db->iterator_init(it); 479 } 480 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){ 481 if (!hci_stack->link_key_db) return 0; 482 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 483 } 484 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 485 if (!hci_stack->link_key_db) return; 486 hci_stack->link_key_db->iterator_done(it); 487 } 488 #endif 489 490 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 491 switch (address_type){ 492 case BD_ADDR_TYPE_LE_PUBLIC: 493 case BD_ADDR_TYPE_LE_RANDOM: 494 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 495 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 496 return true; 497 default: 498 return false; 499 } 500 } 501 502 static int hci_is_le_connection(hci_connection_t * connection){ 503 return hci_is_le_connection_type(connection->address_type); 504 } 505 506 /** 507 * count connections 508 */ 509 static int nr_hci_connections(void){ 510 int count = 0; 511 btstack_linked_item_t *it; 512 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 513 count++; 514 } 515 return count; 516 } 517 518 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 519 520 unsigned int num_packets_sent_classic = 0; 521 unsigned int num_packets_sent_le = 0; 522 523 btstack_linked_item_t *it; 524 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 525 hci_connection_t * connection = (hci_connection_t *) it; 526 if (hci_is_le_connection(connection)){ 527 num_packets_sent_le += connection->num_packets_sent; 528 } 529 if (connection->address_type == BD_ADDR_TYPE_ACL){ 530 num_packets_sent_classic += connection->num_packets_sent; 531 } 532 } 533 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 534 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 535 int free_slots_le = 0; 536 537 if (free_slots_classic < 0){ 538 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); 539 return 0; 540 } 541 542 if (hci_stack->le_acl_packets_total_num){ 543 // if we have LE slots, they are used 544 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 545 if (free_slots_le < 0){ 546 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); 547 return 0; 548 } 549 } else { 550 // otherwise, classic slots are used for LE, too 551 free_slots_classic -= num_packets_sent_le; 552 if (free_slots_classic < 0){ 553 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); 554 return 0; 555 } 556 } 557 558 switch (address_type){ 559 case BD_ADDR_TYPE_UNKNOWN: 560 log_error("hci_number_free_acl_slots: unknown address type"); 561 return 0; 562 563 case BD_ADDR_TYPE_ACL: 564 return free_slots_classic; 565 566 default: 567 if (hci_stack->le_acl_packets_total_num){ 568 return free_slots_le; 569 } 570 return free_slots_classic; 571 } 572 } 573 574 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 575 // get connection type 576 hci_connection_t * connection = hci_connection_for_handle(con_handle); 577 if (!connection){ 578 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 579 return 0; 580 } 581 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 582 } 583 584 #ifdef ENABLE_CLASSIC 585 static int hci_number_free_sco_slots(void){ 586 unsigned int num_sco_packets_sent = 0; 587 btstack_linked_item_t *it; 588 if (hci_stack->synchronous_flow_control_enabled){ 589 // explicit flow control 590 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 591 hci_connection_t * connection = (hci_connection_t *) it; 592 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 593 num_sco_packets_sent += connection->num_packets_sent; 594 } 595 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 596 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 597 return 0; 598 } 599 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 600 } else { 601 // implicit flow control -- TODO 602 int num_ready = 0; 603 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 604 hci_connection_t * connection = (hci_connection_t *) it; 605 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 606 if (connection->sco_tx_ready == 0) continue; 607 num_ready++; 608 } 609 return num_ready; 610 } 611 } 612 #endif 613 614 // only used to send HCI Host Number Completed Packets 615 static int hci_can_send_comand_packet_transport(void){ 616 if (hci_stack->hci_packet_buffer_reserved) return 0; 617 618 // check for async hci transport implementations 619 if (hci_stack->hci_transport->can_send_packet_now){ 620 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 621 return 0; 622 } 623 } 624 return 1; 625 } 626 627 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 628 int hci_can_send_command_packet_now(void){ 629 if (hci_can_send_comand_packet_transport() == 0) return 0; 630 return hci_stack->num_cmd_packets > 0u; 631 } 632 633 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 634 // check for async hci transport implementations 635 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 636 return hci_stack->hci_transport->can_send_packet_now(packet_type); 637 } 638 639 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 640 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 641 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 642 } 643 644 int hci_can_send_acl_le_packet_now(void){ 645 if (hci_stack->hci_packet_buffer_reserved) return 0; 646 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 647 } 648 649 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 650 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 651 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 652 } 653 654 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 655 if (hci_stack->hci_packet_buffer_reserved) return 0; 656 return hci_can_send_prepared_acl_packet_now(con_handle); 657 } 658 659 #ifdef ENABLE_CLASSIC 660 int hci_can_send_acl_classic_packet_now(void){ 661 if (hci_stack->hci_packet_buffer_reserved) return 0; 662 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 663 } 664 665 int hci_can_send_prepared_sco_packet_now(void){ 666 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 667 if (hci_have_usb_transport()){ 668 return hci_stack->sco_can_send_now; 669 } else { 670 return hci_number_free_sco_slots() > 0; 671 } 672 } 673 674 int hci_can_send_sco_packet_now(void){ 675 if (hci_stack->hci_packet_buffer_reserved) return 0; 676 return hci_can_send_prepared_sco_packet_now(); 677 } 678 679 void hci_request_sco_can_send_now_event(void){ 680 hci_stack->sco_waiting_for_can_send_now = 1; 681 hci_notify_if_sco_can_send_now(); 682 } 683 #endif 684 685 // used for internal checks in l2cap.c 686 int hci_is_packet_buffer_reserved(void){ 687 return hci_stack->hci_packet_buffer_reserved; 688 } 689 690 // reserves outgoing packet buffer. @returns 1 if successful 691 int hci_reserve_packet_buffer(void){ 692 if (hci_stack->hci_packet_buffer_reserved) { 693 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 694 return 0; 695 } 696 hci_stack->hci_packet_buffer_reserved = 1; 697 return 1; 698 } 699 700 void hci_release_packet_buffer(void){ 701 hci_stack->hci_packet_buffer_reserved = 0; 702 } 703 704 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 705 static int hci_transport_synchronous(void){ 706 return hci_stack->hci_transport->can_send_packet_now == NULL; 707 } 708 709 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 710 711 // 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); 712 713 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 714 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 715 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 716 max_acl_data_packet_length = hci_stack->le_data_packets_length; 717 } 718 719 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 720 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 721 max_acl_data_packet_length = connection->le_max_tx_octets; 722 } 723 #endif 724 725 log_debug("hci_send_acl_packet_fragments entered"); 726 727 int err; 728 // multiple packets could be send on a synchronous HCI transport 729 while (true){ 730 731 log_debug("hci_send_acl_packet_fragments loop entered"); 732 733 // get current data 734 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 735 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 736 bool more_fragments = false; 737 738 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 739 if (current_acl_data_packet_length > max_acl_data_packet_length){ 740 more_fragments = true; 741 current_acl_data_packet_length = max_acl_data_packet_length; 742 } 743 744 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 745 if (acl_header_pos > 0u){ 746 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 747 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 748 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 749 } 750 751 // update header len 752 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 753 754 // count packet 755 connection->num_packets_sent++; 756 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 757 758 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 759 if (more_fragments){ 760 // update start of next fragment to send 761 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 762 } else { 763 // done 764 hci_stack->acl_fragmentation_pos = 0; 765 hci_stack->acl_fragmentation_total_size = 0; 766 } 767 768 // send packet 769 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 770 const int size = current_acl_data_packet_length + 4; 771 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 772 hci_stack->acl_fragmentation_tx_active = 1; 773 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 774 775 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 776 777 // done yet? 778 if (!more_fragments) break; 779 780 // can send more? 781 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 782 } 783 784 log_debug("hci_send_acl_packet_fragments loop over"); 785 786 // release buffer now for synchronous transport 787 if (hci_transport_synchronous()){ 788 hci_stack->acl_fragmentation_tx_active = 0; 789 hci_release_packet_buffer(); 790 hci_emit_transport_packet_sent(); 791 } 792 793 return err; 794 } 795 796 // pre: caller has reserved the packet buffer 797 int hci_send_acl_packet_buffer(int size){ 798 799 // log_info("hci_send_acl_packet_buffer size %u", size); 800 801 if (!hci_stack->hci_packet_buffer_reserved) { 802 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 803 return 0; 804 } 805 806 uint8_t * packet = hci_stack->hci_packet_buffer; 807 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 808 809 // check for free places on Bluetooth module 810 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 811 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 812 hci_release_packet_buffer(); 813 hci_emit_transport_packet_sent(); 814 return BTSTACK_ACL_BUFFERS_FULL; 815 } 816 817 hci_connection_t *connection = hci_connection_for_handle( con_handle); 818 if (!connection) { 819 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 820 hci_release_packet_buffer(); 821 hci_emit_transport_packet_sent(); 822 return 0; 823 } 824 825 #ifdef ENABLE_CLASSIC 826 hci_connection_timestamp(connection); 827 #endif 828 829 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 830 831 // setup data 832 hci_stack->acl_fragmentation_total_size = size; 833 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 834 835 return hci_send_acl_packet_fragments(connection); 836 } 837 838 #ifdef ENABLE_CLASSIC 839 // pre: caller has reserved the packet buffer 840 int hci_send_sco_packet_buffer(int size){ 841 842 // log_info("hci_send_acl_packet_buffer size %u", size); 843 844 if (!hci_stack->hci_packet_buffer_reserved) { 845 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 846 return 0; 847 } 848 849 uint8_t * packet = hci_stack->hci_packet_buffer; 850 851 // skip checks in loopback mode 852 if (!hci_stack->loopback_mode){ 853 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 854 855 // check for free places on Bluetooth module 856 if (!hci_can_send_prepared_sco_packet_now()) { 857 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 858 hci_release_packet_buffer(); 859 hci_emit_transport_packet_sent(); 860 return BTSTACK_ACL_BUFFERS_FULL; 861 } 862 863 // track send packet in connection struct 864 hci_connection_t *connection = hci_connection_for_handle( con_handle); 865 if (!connection) { 866 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 867 hci_release_packet_buffer(); 868 hci_emit_transport_packet_sent(); 869 return 0; 870 } 871 872 if (hci_have_usb_transport()){ 873 // token used 874 hci_stack->sco_can_send_now = 0; 875 } else { 876 if (hci_stack->synchronous_flow_control_enabled){ 877 connection->num_packets_sent++; 878 } else { 879 connection->sco_tx_ready--; 880 } 881 } 882 } 883 884 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 885 886 #ifdef HAVE_SCO_TRANSPORT 887 hci_stack->sco_transport->send_packet(packet, size); 888 hci_release_packet_buffer(); 889 hci_emit_transport_packet_sent(); 890 891 return 0; 892 #else 893 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 894 if (hci_transport_synchronous()){ 895 hci_release_packet_buffer(); 896 hci_emit_transport_packet_sent(); 897 } 898 899 return err; 900 #endif 901 } 902 #endif 903 904 static void acl_handler(uint8_t *packet, uint16_t size){ 905 906 // get info 907 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 908 hci_connection_t *conn = hci_connection_for_handle(con_handle); 909 uint8_t acl_flags = READ_ACL_FLAGS(packet); 910 uint16_t acl_length = READ_ACL_LENGTH(packet); 911 912 // ignore non-registered handle 913 if (!conn){ 914 log_error("acl_handler called with non-registered handle %u!" , con_handle); 915 return; 916 } 917 918 // assert packet is complete 919 if ((acl_length + 4u) != size){ 920 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 921 return; 922 } 923 924 #ifdef ENABLE_CLASSIC 925 // update idle timestamp 926 hci_connection_timestamp(conn); 927 #endif 928 929 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 930 hci_stack->host_completed_packets = 1; 931 conn->num_packets_completed++; 932 #endif 933 934 // handle different packet types 935 switch (acl_flags & 0x03u) { 936 937 case 0x01: // continuation fragment 938 939 // sanity checks 940 if (conn->acl_recombination_pos == 0u) { 941 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 942 return; 943 } 944 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 945 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 946 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 947 conn->acl_recombination_pos = 0; 948 return; 949 } 950 951 // append fragment payload (header already stored) 952 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 953 &packet[4], acl_length); 954 conn->acl_recombination_pos += acl_length; 955 956 // forward complete L2CAP packet if complete. 957 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 958 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 959 // reset recombination buffer 960 conn->acl_recombination_length = 0; 961 conn->acl_recombination_pos = 0; 962 } 963 break; 964 965 case 0x02: { // first fragment 966 967 // sanity check 968 if (conn->acl_recombination_pos) { 969 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 970 conn->acl_recombination_pos = 0; 971 } 972 973 // peek into L2CAP packet! 974 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 975 976 // compare fragment size to L2CAP packet size 977 if (acl_length >= (l2cap_length + 4u)){ 978 // forward fragment as L2CAP packet 979 hci_emit_acl_packet(packet, acl_length + 4u); 980 } else { 981 982 if (acl_length > HCI_ACL_BUFFER_SIZE){ 983 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 984 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 985 return; 986 } 987 988 // store first fragment and tweak acl length for complete package 989 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 990 packet, acl_length + 4u); 991 conn->acl_recombination_pos = acl_length + 4u; 992 conn->acl_recombination_length = l2cap_length; 993 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 994 } 995 break; 996 997 } 998 default: 999 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1000 return; 1001 } 1002 1003 // execute main loop 1004 hci_run(); 1005 } 1006 1007 static void hci_shutdown_connection(hci_connection_t *conn){ 1008 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1009 1010 #ifdef ENABLE_CLASSIC 1011 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1012 bd_addr_type_t addr_type = conn->address_type; 1013 #endif 1014 #ifdef HAVE_SCO_TRANSPORT 1015 hci_con_handle_t con_handle = conn->con_handle; 1016 #endif 1017 #endif 1018 1019 btstack_run_loop_remove_timer(&conn->timeout); 1020 1021 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1022 btstack_memory_hci_connection_free( conn ); 1023 1024 // now it's gone 1025 hci_emit_nr_connections_changed(); 1026 1027 #ifdef ENABLE_CLASSIC 1028 #ifdef ENABLE_SCO_OVER_HCI 1029 // update SCO 1030 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1031 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1032 } 1033 #endif 1034 #ifdef HAVE_SCO_TRANSPORT 1035 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1036 hci_stack->sco_transport->close(con_handle); 1037 } 1038 #endif 1039 #endif 1040 } 1041 1042 #ifdef ENABLE_CLASSIC 1043 1044 static const uint16_t packet_type_sizes[] = { 1045 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1046 HCI_ACL_DH1_SIZE, 0, 0, 0, 1047 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1048 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1049 }; 1050 static const uint8_t packet_type_feature_requirement_bit[] = { 1051 0, // 3 slot packets 1052 1, // 5 slot packets 1053 25, // EDR 2 mpbs 1054 26, // EDR 3 mbps 1055 39, // 3 slot EDR packts 1056 40, // 5 slot EDR packet 1057 }; 1058 static const uint16_t packet_type_feature_packet_mask[] = { 1059 0x0f00, // 3 slot packets 1060 0xf000, // 5 slot packets 1061 0x1102, // EDR 2 mpbs 1062 0x2204, // EDR 3 mbps 1063 0x0300, // 3 slot EDR packts 1064 0x3000, // 5 slot EDR packet 1065 }; 1066 1067 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1068 // enable packet types based on size 1069 uint16_t packet_types = 0; 1070 unsigned int i; 1071 for (i=0;i<16;i++){ 1072 if (packet_type_sizes[i] == 0) continue; 1073 if (packet_type_sizes[i] <= buffer_size){ 1074 packet_types |= 1 << i; 1075 } 1076 } 1077 // disable packet types due to missing local supported features 1078 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1079 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1080 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1081 if (feature_set) continue; 1082 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1083 packet_types &= ~packet_type_feature_packet_mask[i]; 1084 } 1085 // flip bits for "may not be used" 1086 packet_types ^= 0x3306; 1087 return packet_types; 1088 } 1089 1090 uint16_t hci_usable_acl_packet_types(void){ 1091 return hci_stack->packet_types; 1092 } 1093 #endif 1094 1095 uint8_t* hci_get_outgoing_packet_buffer(void){ 1096 // hci packet buffer is >= acl data packet length 1097 return hci_stack->hci_packet_buffer; 1098 } 1099 1100 uint16_t hci_max_acl_data_packet_length(void){ 1101 return hci_stack->acl_data_packet_length; 1102 } 1103 1104 #ifdef ENABLE_CLASSIC 1105 int hci_extended_sco_link_supported(void){ 1106 // No. 31, byte 3, bit 7 1107 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1108 } 1109 #endif 1110 1111 int hci_non_flushable_packet_boundary_flag_supported(void){ 1112 // No. 54, byte 6, bit 6 1113 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1114 } 1115 1116 static int gap_ssp_supported(void){ 1117 // No. 51, byte 6, bit 3 1118 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1119 } 1120 1121 static int hci_classic_supported(void){ 1122 #ifdef ENABLE_CLASSIC 1123 // No. 37, byte 4, bit 5, = No BR/EDR Support 1124 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1125 #else 1126 return 0; 1127 #endif 1128 } 1129 1130 static int hci_le_supported(void){ 1131 #ifdef ENABLE_BLE 1132 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1133 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1134 #else 1135 return 0; 1136 #endif 1137 } 1138 1139 #ifdef ENABLE_BLE 1140 1141 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1142 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1143 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1144 } else { 1145 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1146 } 1147 } 1148 1149 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1150 *addr_type = hci_stack->le_own_addr_type; 1151 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1152 } 1153 1154 #ifdef ENABLE_LE_PERIPHERAL 1155 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1156 *addr_type = hci_stack->le_advertisements_own_addr_type; 1157 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1158 }; 1159 #endif 1160 1161 #ifdef ENABLE_LE_CENTRAL 1162 1163 /** 1164 * @brief Get own addr type and address used for LE connections (Central) 1165 */ 1166 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1167 *addr_type = hci_stack->le_connection_own_addr_type; 1168 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1169 } 1170 1171 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1172 1173 int offset = 3; 1174 int num_reports = packet[offset]; 1175 offset += 1; 1176 1177 int i; 1178 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1179 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1180 for (i=0; (i<num_reports) && (offset < size);i++){ 1181 // sanity checks on data_length: 1182 uint8_t data_length = packet[offset + 8]; 1183 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1184 if ((offset + 9u + data_length + 1u) > size) return; 1185 // setup event 1186 uint8_t event_size = 10u + data_length; 1187 int pos = 0; 1188 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1189 event[pos++] = event_size; 1190 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1191 offset += 8; 1192 pos += 8; 1193 event[pos++] = packet[offset + 1 + data_length]; // rssi 1194 event[pos++] = data_length; 1195 offset++; 1196 (void)memcpy(&event[pos], &packet[offset], data_length); 1197 pos += data_length; 1198 offset += data_length + 1u; // rssi 1199 hci_emit_event(event, pos, 1); 1200 } 1201 } 1202 #endif 1203 #endif 1204 1205 #ifdef ENABLE_BLE 1206 #ifdef ENABLE_LE_PERIPHERAL 1207 static void hci_update_advertisements_enabled_for_current_roles(void){ 1208 if (hci_stack->le_advertisements_enabled){ 1209 // get number of active le slave connections 1210 int num_slave_connections = 0; 1211 btstack_linked_list_iterator_t it; 1212 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1213 while (btstack_linked_list_iterator_has_next(&it)){ 1214 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1215 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1216 if (con->state != OPEN) continue; 1217 if (con->role != HCI_ROLE_SLAVE) continue; 1218 if (!hci_is_le_connection(con)) continue; 1219 num_slave_connections++; 1220 } 1221 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1222 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1223 } else { 1224 hci_stack->le_advertisements_enabled_for_current_roles = false; 1225 } 1226 } 1227 #endif 1228 #endif 1229 1230 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1231 1232 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1233 if (!hci_stack->config) return 0; 1234 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1235 // Limit baud rate for Broadcom chipsets to 3 mbps 1236 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1237 baud_rate = 3000000; 1238 } 1239 return baud_rate; 1240 } 1241 1242 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1243 UNUSED(ds); 1244 1245 switch (hci_stack->substate){ 1246 case HCI_INIT_W4_SEND_RESET: 1247 log_info("Resend HCI Reset"); 1248 hci_stack->substate = HCI_INIT_SEND_RESET; 1249 hci_stack->num_cmd_packets = 1; 1250 hci_run(); 1251 break; 1252 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1253 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1254 if (hci_stack->hci_transport->reset_link){ 1255 hci_stack->hci_transport->reset_link(); 1256 } 1257 1258 /* fall through */ 1259 1260 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1261 log_info("Resend HCI Reset - CSR Warm Boot"); 1262 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1263 hci_stack->num_cmd_packets = 1; 1264 hci_run(); 1265 break; 1266 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1267 if (hci_stack->hci_transport->set_baudrate){ 1268 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1269 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1270 hci_stack->hci_transport->set_baudrate(baud_rate); 1271 } 1272 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1273 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1274 if (hci_stack->hci_transport->reset_link){ 1275 log_info("Link Reset"); 1276 hci_stack->hci_transport->reset_link(); 1277 } 1278 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1279 hci_run(); 1280 } 1281 break; 1282 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1283 // otherwise continue 1284 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1285 hci_send_cmd(&hci_read_local_supported_commands); 1286 break; 1287 default: 1288 break; 1289 } 1290 } 1291 #endif 1292 1293 static void hci_initializing_next_state(void){ 1294 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1295 } 1296 1297 // assumption: hci_can_send_command_packet_now() == true 1298 static void hci_initializing_run(void){ 1299 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1300 switch (hci_stack->substate){ 1301 case HCI_INIT_SEND_RESET: 1302 hci_state_reset(); 1303 1304 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1305 // prepare reset if command complete not received in 100ms 1306 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1307 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1308 btstack_run_loop_add_timer(&hci_stack->timeout); 1309 #endif 1310 // send command 1311 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1312 hci_send_cmd(&hci_reset); 1313 break; 1314 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1315 hci_send_cmd(&hci_read_local_version_information); 1316 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1317 break; 1318 case HCI_INIT_SEND_READ_LOCAL_NAME: 1319 hci_send_cmd(&hci_read_local_name); 1320 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1321 break; 1322 1323 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1324 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1325 hci_state_reset(); 1326 // prepare reset if command complete not received in 100ms 1327 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1328 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1329 btstack_run_loop_add_timer(&hci_stack->timeout); 1330 // send command 1331 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1332 hci_send_cmd(&hci_reset); 1333 break; 1334 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1335 hci_state_reset(); 1336 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1337 hci_send_cmd(&hci_reset); 1338 break; 1339 case HCI_INIT_SEND_BAUD_CHANGE: { 1340 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1341 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1342 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1343 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1344 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1345 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1346 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1347 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1348 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1349 btstack_run_loop_add_timer(&hci_stack->timeout); 1350 } 1351 break; 1352 } 1353 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1354 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1355 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1356 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1357 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1358 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1359 break; 1360 } 1361 case HCI_INIT_CUSTOM_INIT: 1362 // Custom initialization 1363 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1364 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1365 bool send_cmd = false; 1366 switch (hci_stack->chipset_result){ 1367 case BTSTACK_CHIPSET_VALID_COMMAND: 1368 send_cmd = true; 1369 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1370 break; 1371 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1372 send_cmd = true; 1373 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1374 log_info("CSR Warm Boot"); 1375 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1376 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1377 btstack_run_loop_add_timer(&hci_stack->timeout); 1378 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1379 && hci_stack->config 1380 && hci_stack->chipset 1381 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1382 && hci_stack->hci_transport->set_baudrate 1383 && hci_transport_uart_get_main_baud_rate()){ 1384 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1385 } else { 1386 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1387 } 1388 break; 1389 default: 1390 break; 1391 } 1392 1393 if (send_cmd){ 1394 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1395 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1396 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1397 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1398 break; 1399 } 1400 log_info("Init script done"); 1401 1402 // Init script download on Broadcom chipsets causes: 1403 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1404 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1405 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1406 1407 // - baud rate to reset, restore UART baud rate if needed 1408 int need_baud_change = hci_stack->config 1409 && hci_stack->chipset 1410 && hci_stack->chipset->set_baudrate_command 1411 && hci_stack->hci_transport->set_baudrate 1412 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1413 if (need_baud_change) { 1414 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1415 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1416 hci_stack->hci_transport->set_baudrate(baud_rate); 1417 } 1418 1419 uint16_t bcm_delay_ms = 300; 1420 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1421 // -> Work around: wait here. 1422 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1423 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1424 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1425 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1426 btstack_run_loop_add_timer(&hci_stack->timeout); 1427 break; 1428 } 1429 } 1430 // otherwise continue 1431 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1432 hci_send_cmd(&hci_read_local_supported_commands); 1433 break; 1434 case HCI_INIT_SET_BD_ADDR: 1435 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1436 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1437 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1438 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1439 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1440 break; 1441 #endif 1442 1443 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1444 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1445 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1446 hci_send_cmd(&hci_read_local_supported_commands); 1447 break; 1448 case HCI_INIT_READ_BD_ADDR: 1449 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1450 hci_send_cmd(&hci_read_bd_addr); 1451 break; 1452 case HCI_INIT_READ_BUFFER_SIZE: 1453 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1454 hci_send_cmd(&hci_read_buffer_size); 1455 break; 1456 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1457 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1458 hci_send_cmd(&hci_read_local_supported_features); 1459 break; 1460 1461 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1462 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1463 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1464 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1465 break; 1466 case HCI_INIT_HOST_BUFFER_SIZE: 1467 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1468 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1469 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1470 break; 1471 #endif 1472 1473 case HCI_INIT_SET_EVENT_MASK: 1474 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1475 if (hci_le_supported()){ 1476 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1477 } else { 1478 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1479 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1480 } 1481 break; 1482 1483 #ifdef ENABLE_CLASSIC 1484 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1485 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1486 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1487 break; 1488 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1489 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1490 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1491 break; 1492 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1493 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1494 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1495 break; 1496 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1497 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1498 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1499 break; 1500 case HCI_INIT_WRITE_LOCAL_NAME: { 1501 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1502 hci_reserve_packet_buffer(); 1503 uint8_t * packet = hci_stack->hci_packet_buffer; 1504 // construct HCI Command and send 1505 uint16_t opcode = hci_write_local_name.opcode; 1506 hci_stack->last_cmd_opcode = opcode; 1507 packet[0] = opcode & 0xff; 1508 packet[1] = opcode >> 8; 1509 packet[2] = DEVICE_NAME_LEN; 1510 memset(&packet[3], 0, DEVICE_NAME_LEN); 1511 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1512 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1513 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1514 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1515 // expand '00:00:00:00:00:00' in name with bd_addr 1516 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1517 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1518 break; 1519 } 1520 case HCI_INIT_WRITE_EIR_DATA: { 1521 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1522 hci_reserve_packet_buffer(); 1523 uint8_t * packet = hci_stack->hci_packet_buffer; 1524 // construct HCI Command in-place and send 1525 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1526 hci_stack->last_cmd_opcode = opcode; 1527 uint16_t offset = 0; 1528 packet[offset++] = opcode & 0xff; 1529 packet[offset++] = opcode >> 8; 1530 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1531 packet[offset++] = 0; // FEC not required 1532 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1533 if (hci_stack->eir_data){ 1534 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1535 ad_context_t context; 1536 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1537 uint8_t data_type = ad_iterator_get_data_type(&context); 1538 uint8_t size = ad_iterator_get_data_len(&context); 1539 const uint8_t *data = ad_iterator_get_data(&context); 1540 // copy item 1541 packet[offset++] = size + 1; 1542 packet[offset++] = data_type; 1543 memcpy(&packet[offset], data, size); 1544 // update name item 1545 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1546 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1547 } 1548 offset += size; 1549 } 1550 } else { 1551 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1552 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1553 packet[offset++] = bytes_to_copy + 1; 1554 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1555 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1556 // expand '00:00:00:00:00:00' in name with bd_addr 1557 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1558 } 1559 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1560 break; 1561 } 1562 case HCI_INIT_WRITE_INQUIRY_MODE: 1563 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1564 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1565 break; 1566 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1567 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1568 hci_stack->secure_connections_active = true; 1569 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1570 break; 1571 case HCI_INIT_WRITE_SCAN_ENABLE: 1572 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1573 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1574 break; 1575 // only sent if ENABLE_SCO_OVER_HCI is defined 1576 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1577 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1578 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1579 break; 1580 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1581 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1582 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1583 break; 1584 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1585 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1586 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1587 #ifdef ENABLE_SCO_OVER_HCI 1588 log_info("BCM: Route SCO data via HCI transport"); 1589 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1590 #endif 1591 #ifdef ENABLE_SCO_OVER_PCM 1592 log_info("BCM: Route SCO data via PCM interface"); 1593 #ifdef ENABLE_BCM_PCM_WBS 1594 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1595 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1596 #else 1597 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1598 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1599 #endif 1600 #endif 1601 break; 1602 #ifdef ENABLE_SCO_OVER_PCM 1603 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1604 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1605 log_info("BCM: Config PCM interface for I2S"); 1606 #ifdef ENABLE_BCM_PCM_WBS 1607 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1608 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1609 #else 1610 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1611 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1612 #endif 1613 break; 1614 #endif 1615 #endif 1616 1617 #ifdef ENABLE_BLE 1618 // LE INIT 1619 case HCI_INIT_LE_READ_BUFFER_SIZE: 1620 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1621 hci_send_cmd(&hci_le_read_buffer_size); 1622 break; 1623 case HCI_INIT_LE_SET_EVENT_MASK: 1624 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1625 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1626 break; 1627 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1628 // LE Supported Host = 1, Simultaneous Host = 0 1629 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1630 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1631 break; 1632 #endif 1633 1634 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1635 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1636 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1637 hci_send_cmd(&hci_le_read_maximum_data_length); 1638 break; 1639 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1640 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1641 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1642 break; 1643 #endif 1644 1645 #ifdef ENABLE_LE_CENTRAL 1646 case HCI_INIT_READ_WHITE_LIST_SIZE: 1647 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1648 hci_send_cmd(&hci_le_read_white_list_size); 1649 break; 1650 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1651 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1652 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); 1653 break; 1654 #endif 1655 default: 1656 return; 1657 } 1658 } 1659 1660 static void hci_init_done(void){ 1661 // done. tell the app 1662 log_info("hci_init_done -> HCI_STATE_WORKING"); 1663 hci_stack->state = HCI_STATE_WORKING; 1664 hci_emit_state(); 1665 hci_run(); 1666 } 1667 1668 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1669 bool command_completed = false; 1670 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1671 uint16_t opcode = little_endian_read_16(packet,3); 1672 if (opcode == hci_stack->last_cmd_opcode){ 1673 command_completed = true; 1674 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1675 } else { 1676 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1677 } 1678 } 1679 1680 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1681 uint8_t status = packet[2]; 1682 uint16_t opcode = little_endian_read_16(packet,4); 1683 if (opcode == hci_stack->last_cmd_opcode){ 1684 if (status){ 1685 command_completed = true; 1686 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1687 } else { 1688 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1689 } 1690 } else { 1691 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1692 } 1693 } 1694 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1695 // Vendor == CSR 1696 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1697 // TODO: track actual command 1698 command_completed = true; 1699 } 1700 1701 // Vendor == Toshiba 1702 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1703 // TODO: track actual command 1704 command_completed = true; 1705 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1706 hci_stack->num_cmd_packets = 1; 1707 } 1708 #endif 1709 1710 return command_completed; 1711 } 1712 1713 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1714 1715 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1716 1717 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1718 1719 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1720 1721 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1722 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1723 // 1724 // HCI Reset 1725 // Timeout 100 ms 1726 // HCI Reset 1727 // Command Complete Reset 1728 // HCI Read Local Version Information 1729 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1730 // hang... 1731 // 1732 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1733 if (!command_completed 1734 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1735 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1736 1737 uint16_t opcode = little_endian_read_16(packet,3); 1738 if (opcode == hci_reset.opcode){ 1739 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1740 return; 1741 } 1742 } 1743 1744 // CSR & H5 1745 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1746 if (!command_completed 1747 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1748 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1749 1750 uint16_t opcode = little_endian_read_16(packet,3); 1751 if (opcode == hci_reset.opcode){ 1752 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1753 return; 1754 } 1755 } 1756 1757 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1758 // fix: Correct substate and behave as command below 1759 if (command_completed){ 1760 switch (hci_stack->substate){ 1761 case HCI_INIT_SEND_RESET: 1762 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1763 break; 1764 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1765 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1766 break; 1767 default: 1768 break; 1769 } 1770 } 1771 1772 #endif 1773 1774 if (!command_completed) return; 1775 1776 bool need_baud_change = false; 1777 bool need_addr_change = false; 1778 1779 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1780 need_baud_change = hci_stack->config 1781 && hci_stack->chipset 1782 && hci_stack->chipset->set_baudrate_command 1783 && hci_stack->hci_transport->set_baudrate 1784 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1785 1786 need_addr_change = hci_stack->custom_bd_addr_set 1787 && hci_stack->chipset 1788 && hci_stack->chipset->set_bd_addr_command; 1789 #endif 1790 1791 switch(hci_stack->substate){ 1792 1793 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1794 case HCI_INIT_SEND_RESET: 1795 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1796 // fix: just correct substate and behave as command below 1797 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1798 btstack_run_loop_remove_timer(&hci_stack->timeout); 1799 break; 1800 case HCI_INIT_W4_SEND_RESET: 1801 btstack_run_loop_remove_timer(&hci_stack->timeout); 1802 break; 1803 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1804 log_info("Received local name, need baud change %d", (int) need_baud_change); 1805 if (need_baud_change){ 1806 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1807 return; 1808 } 1809 // skip baud change 1810 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1811 return; 1812 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1813 // for STLC2500D, baud rate change already happened. 1814 // for others, baud rate gets changed now 1815 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1816 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1817 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1818 hci_stack->hci_transport->set_baudrate(baud_rate); 1819 } 1820 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1821 return; 1822 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1823 btstack_run_loop_remove_timer(&hci_stack->timeout); 1824 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1825 return; 1826 case HCI_INIT_W4_CUSTOM_INIT: 1827 // repeat custom init 1828 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1829 return; 1830 #else 1831 case HCI_INIT_W4_SEND_RESET: 1832 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1833 return ; 1834 #endif 1835 1836 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1837 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1838 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1839 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1840 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1841 return; 1842 } 1843 if (need_addr_change){ 1844 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1845 return; 1846 } 1847 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1848 return; 1849 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1850 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1851 if (need_baud_change){ 1852 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1853 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1854 hci_stack->hci_transport->set_baudrate(baud_rate); 1855 } 1856 if (need_addr_change){ 1857 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1858 return; 1859 } 1860 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1861 return; 1862 case HCI_INIT_W4_SET_BD_ADDR: 1863 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1864 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1865 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1866 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1867 return; 1868 } 1869 // skipping st warm boot 1870 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1871 return; 1872 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1873 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1874 return; 1875 #endif 1876 case HCI_INIT_W4_READ_BD_ADDR: 1877 // only read buffer size if supported 1878 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1879 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1880 return; 1881 } 1882 // skipping read buffer size 1883 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1884 return; 1885 case HCI_INIT_W4_SET_EVENT_MASK: 1886 // skip Classic init commands for LE only chipsets 1887 if (!hci_classic_supported()){ 1888 #ifdef ENABLE_BLE 1889 if (hci_le_supported()){ 1890 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1891 return; 1892 } 1893 #endif 1894 log_error("Neither BR/EDR nor LE supported"); 1895 hci_init_done(); 1896 return; 1897 } 1898 if (!gap_ssp_supported()){ 1899 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1900 return; 1901 } 1902 break; 1903 #ifdef ENABLE_BLE 1904 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1905 // skip write le host if not supported (e.g. on LE only EM9301) 1906 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1907 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1908 return; 1909 1910 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1911 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1912 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1913 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1914 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1915 return; 1916 } 1917 // explicit fall through to reduce repetitions 1918 1919 #ifdef ENABLE_LE_CENTRAL 1920 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1921 #else 1922 hci_init_done(); 1923 #endif 1924 return; 1925 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1926 1927 #endif /* ENABLE_BLE */ 1928 1929 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1930 // skip write secure connections host support if not supported or disabled 1931 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1932 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1933 return; 1934 } 1935 break; 1936 1937 #ifdef ENABLE_SCO_OVER_HCI 1938 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1939 // skip write synchronous flow control if not supported 1940 if (hci_stack->local_supported_commands[0] & 0x04) break; 1941 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1942 1943 /* fall through */ 1944 1945 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1946 // skip write default erroneous data reporting if not supported 1947 if (hci_stack->local_supported_commands[0] & 0x08) break; 1948 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1949 1950 /* fall through */ 1951 1952 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1953 // skip bcm set sco pcm config on non-Broadcom chipsets 1954 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1955 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1956 1957 /* fall through */ 1958 1959 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1960 if (!hci_le_supported()){ 1961 // SKIP LE init for Classic only configuration 1962 hci_init_done(); 1963 return; 1964 } 1965 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1966 break; 1967 1968 #else /* !ENABLE_SCO_OVER_HCI */ 1969 1970 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1971 #ifdef ENABLE_SCO_OVER_PCM 1972 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1973 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1974 return; 1975 } 1976 #endif 1977 /* fall through */ 1978 1979 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1980 #ifdef ENABLE_BLE 1981 if (hci_le_supported()){ 1982 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1983 return; 1984 } 1985 #endif 1986 // SKIP LE init for Classic only configuration 1987 hci_init_done(); 1988 return; 1989 #endif /* ENABLE_SCO_OVER_HCI */ 1990 1991 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1992 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1993 // Response to command before init done state -> init done 1994 case (HCI_INIT_DONE-1): 1995 hci_init_done(); 1996 return; 1997 #endif 1998 1999 default: 2000 break; 2001 } 2002 hci_initializing_next_state(); 2003 } 2004 2005 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2006 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2007 bd_addr_t bd_address; 2008 (void)memcpy(&bd_address, conn->address, 6); 2009 2010 #ifdef ENABLE_CLASSIC 2011 // cache needed data 2012 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2013 #endif 2014 2015 // connection failed, remove entry 2016 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2017 btstack_memory_hci_connection_free( conn ); 2018 2019 #ifdef ENABLE_CLASSIC 2020 // notify client if dedicated bonding 2021 if (notify_dedicated_bonding_failed){ 2022 log_info("hci notify_dedicated_bonding_failed"); 2023 hci_emit_dedicated_bonding_result(bd_address, status); 2024 } 2025 2026 // if authentication error, also delete link key 2027 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2028 gap_drop_link_key_for_bd_addr(bd_address); 2029 } 2030 #else 2031 UNUSED(status); 2032 #endif 2033 } 2034 2035 #ifdef ENABLE_CLASSIC 2036 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2037 // SSP Controller 2038 if (features[6] & (1 << 3)){ 2039 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2040 } 2041 // eSCO 2042 if (features[3] & (1<<7)){ 2043 conn->remote_supported_features[0] |= 1; 2044 } 2045 // Extended features 2046 if (features[7] & (1<<7)){ 2047 conn->remote_supported_features[0] |= 2; 2048 } 2049 } 2050 2051 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2052 // SSP Host 2053 if (features[0] & (1 << 0)){ 2054 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2055 } 2056 // SC Host 2057 if (features[0] & (1 << 3)){ 2058 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2059 } 2060 } 2061 2062 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2063 // SC Controller 2064 if (features[1] & (1 << 0)){ 2065 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2066 } 2067 } 2068 2069 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2070 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2071 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2072 if (conn->bonding_flags & BONDING_DEDICATED){ 2073 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2074 } 2075 } 2076 #endif 2077 2078 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2079 // handle BT initialization 2080 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2081 hci_initializing_event_handler(packet, size); 2082 } 2083 2084 // help with BT sleep 2085 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2086 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2087 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2088 hci_initializing_next_state(); 2089 } 2090 } 2091 2092 #ifdef ENABLE_CLASSIC 2093 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2094 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2095 conn->encryption_key_size = encryption_key_size; 2096 2097 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 2098 conn->requested_security_level = LEVEL_0; 2099 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2100 return; 2101 } 2102 2103 // Request Authentication if not already done 2104 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2105 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2106 } 2107 #endif 2108 2109 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2110 UNUSED(size); 2111 2112 uint16_t manufacturer; 2113 #ifdef ENABLE_CLASSIC 2114 hci_con_handle_t handle; 2115 hci_connection_t * conn; 2116 uint8_t status; 2117 #endif 2118 // get num cmd packets - limit to 1 to reduce complexity 2119 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2120 2121 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2122 switch (opcode){ 2123 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2124 if (packet[5]) break; 2125 // terminate, name 248 chars 2126 packet[6+248] = 0; 2127 log_info("local name: %s", &packet[6]); 2128 break; 2129 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2130 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2131 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2132 uint16_t acl_len = little_endian_read_16(packet, 6); 2133 uint16_t sco_len = packet[8]; 2134 2135 // determine usable ACL/SCO payload size 2136 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2137 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2138 2139 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2140 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2141 2142 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2143 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2144 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2145 } 2146 break; 2147 case HCI_OPCODE_HCI_READ_RSSI: 2148 if (packet[5] == ERROR_CODE_SUCCESS){ 2149 uint8_t event[5]; 2150 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2151 event[1] = 3; 2152 (void)memcpy(&event[2], &packet[6], 3); 2153 hci_emit_event(event, sizeof(event), 1); 2154 } 2155 break; 2156 #ifdef ENABLE_BLE 2157 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2158 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2159 hci_stack->le_acl_packets_total_num = packet[8]; 2160 // determine usable ACL payload size 2161 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2162 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2163 } 2164 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2165 break; 2166 #endif 2167 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2168 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2169 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2170 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2171 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); 2172 break; 2173 #endif 2174 #ifdef ENABLE_LE_CENTRAL 2175 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2176 hci_stack->le_whitelist_capacity = packet[6]; 2177 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2178 break; 2179 #endif 2180 case HCI_OPCODE_HCI_READ_BD_ADDR: 2181 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2182 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)); 2183 #ifdef ENABLE_CLASSIC 2184 if (hci_stack->link_key_db){ 2185 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2186 } 2187 #endif 2188 break; 2189 #ifdef ENABLE_CLASSIC 2190 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2191 hci_emit_discoverable_enabled(hci_stack->discoverable); 2192 break; 2193 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2194 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2195 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2196 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2197 hci_emit_event(event, sizeof(event), 1); 2198 } 2199 break; 2200 #endif 2201 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2202 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2203 2204 #ifdef ENABLE_CLASSIC 2205 // determine usable ACL packet types based on host buffer size and supported features 2206 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2207 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2208 #endif 2209 // Classic/LE 2210 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2211 break; 2212 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2213 manufacturer = little_endian_read_16(packet, 10); 2214 // map Cypress to Broadcom 2215 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2216 log_info("Treat Cypress as Broadcom"); 2217 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2218 little_endian_store_16(packet, 10, manufacturer); 2219 } 2220 hci_stack->manufacturer = manufacturer; 2221 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2222 break; 2223 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2224 hci_stack->local_supported_commands[0] = 2225 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2226 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2227 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2228 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2229 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2230 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2231 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2232 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2233 hci_stack->local_supported_commands[1] = 2234 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2235 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2236 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2237 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2238 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2239 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2240 break; 2241 #ifdef ENABLE_CLASSIC 2242 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2243 if (packet[5]) return; 2244 hci_stack->synchronous_flow_control_enabled = 1; 2245 break; 2246 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2247 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2248 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2249 conn = hci_connection_for_handle(handle); 2250 if (conn != NULL) { 2251 uint8_t key_size = 0; 2252 if (status == 0){ 2253 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2254 log_info("Handle %04x key Size: %u", handle, key_size); 2255 } else { 2256 key_size = 1; 2257 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2258 } 2259 hci_handle_read_encryption_key_size_complete(conn, key_size); 2260 } 2261 break; 2262 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2263 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2264 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2265 uint8_t event[67]; 2266 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2267 event[1] = 65; 2268 (void)memset(&event[2], 0, 65); 2269 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2270 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2271 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2272 event[2] = 3; 2273 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2274 } else { 2275 event[2] = 1; 2276 } 2277 } 2278 hci_emit_event(event, sizeof(event), 0); 2279 break; 2280 } 2281 #endif 2282 #endif 2283 default: 2284 break; 2285 } 2286 } 2287 2288 #ifdef ENABLE_BLE 2289 static void event_handle_le_connection_complete(const uint8_t * packet){ 2290 bd_addr_t addr; 2291 bd_addr_type_t addr_type; 2292 hci_connection_t * conn; 2293 2294 // Connection management 2295 reverse_bd_addr(&packet[8], addr); 2296 addr_type = (bd_addr_type_t)packet[7]; 2297 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2298 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2299 2300 #ifdef ENABLE_LE_CENTRAL 2301 // handle error: error is reported only to the initiator -> outgoing connection 2302 if (packet[3]){ 2303 2304 // handle cancelled outgoing connection 2305 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2306 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2307 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2308 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2309 // reset state 2310 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2311 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2312 // get outgoing connection conn struct for direct connect 2313 conn = gap_get_outgoing_connection(); 2314 } 2315 2316 // outgoing le connection establishment is done 2317 if (conn){ 2318 // remove entry 2319 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2320 btstack_memory_hci_connection_free( conn ); 2321 } 2322 return; 2323 } 2324 #endif 2325 2326 // on success, both hosts receive connection complete event 2327 if (packet[6] == HCI_ROLE_MASTER){ 2328 #ifdef ENABLE_LE_CENTRAL 2329 // if we're master on an le connection, it was an outgoing connection and we're done with it 2330 // note: no hci_connection_t object exists yet for connect with whitelist 2331 if (hci_is_le_connection_type(addr_type)){ 2332 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2333 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2334 } 2335 #endif 2336 } else { 2337 #ifdef ENABLE_LE_PERIPHERAL 2338 // if we're slave, it was an incoming connection, advertisements have stopped 2339 hci_stack->le_advertisements_active = false; 2340 #endif 2341 } 2342 2343 // LE connections are auto-accepted, so just create a connection if there isn't one already 2344 if (!conn){ 2345 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2346 } 2347 2348 // no memory, sorry. 2349 if (!conn){ 2350 return; 2351 } 2352 2353 conn->state = OPEN; 2354 conn->role = packet[6]; 2355 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2356 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2357 2358 #ifdef ENABLE_LE_PERIPHERAL 2359 if (packet[6] == HCI_ROLE_SLAVE){ 2360 hci_update_advertisements_enabled_for_current_roles(); 2361 } 2362 #endif 2363 2364 // init unenhanced att bearer mtu 2365 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2366 conn->att_connection.mtu_exchanged = false; 2367 2368 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2369 2370 // restart timer 2371 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2372 // btstack_run_loop_add_timer(&conn->timeout); 2373 2374 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2375 2376 hci_emit_nr_connections_changed(); 2377 } 2378 #endif 2379 2380 #ifdef ENABLE_CLASSIC 2381 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){ 2382 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2383 // LEVEL_4 is tested by l2cap 2384 // LEVEL 3 requires MITM protection -> check io capabilities 2385 if (level >= LEVEL_3){ 2386 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2387 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2388 if ((io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) && (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY)) return false; 2389 } 2390 // LEVEL 2 requires SSP, which is a given 2391 return true; 2392 } 2393 2394 static bool hci_ssp_validate_possible_security_level(bd_addr_t addr){ 2395 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2396 if (!conn) return false; 2397 // abort pairing, if requested security level cannot be met 2398 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2399 // inlined hci_add_connection_flags_for_flipped_bd_addr 2400 hci_connection_timestamp(conn); 2401 return true; 2402 } else { 2403 log_info("Level %u cannot be reached", conn->requested_security_level); 2404 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2405 return false; 2406 }; 2407 } 2408 2409 #endif 2410 2411 static void event_handler(uint8_t *packet, uint16_t size){ 2412 2413 uint16_t event_length = packet[1]; 2414 2415 // assert packet is complete 2416 if (size != (event_length + 2u)){ 2417 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2418 return; 2419 } 2420 2421 bd_addr_type_t addr_type; 2422 hci_con_handle_t handle; 2423 hci_connection_t * conn; 2424 int i; 2425 int create_connection_cmd; 2426 2427 #ifdef ENABLE_CLASSIC 2428 hci_link_type_t link_type; 2429 bd_addr_t addr; 2430 #endif 2431 2432 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2433 2434 switch (hci_event_packet_get_type(packet)) { 2435 2436 case HCI_EVENT_COMMAND_COMPLETE: 2437 handle_command_complete_event(packet, size); 2438 break; 2439 2440 case HCI_EVENT_COMMAND_STATUS: 2441 // get num cmd packets - limit to 1 to reduce complexity 2442 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2443 2444 // check command status to detected failed outgoing connections 2445 create_connection_cmd = 0; 2446 #ifdef ENABLE_CLASSIC 2447 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2448 create_connection_cmd = 1; 2449 } 2450 #endif 2451 #ifdef ENABLE_LE_CENTRAL 2452 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2453 create_connection_cmd = 1; 2454 } 2455 #endif 2456 if (create_connection_cmd) { 2457 uint8_t status = hci_event_command_status_get_status(packet); 2458 addr_type = hci_stack->outgoing_addr_type; 2459 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2460 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); 2461 2462 // reset outgoing address info 2463 memset(hci_stack->outgoing_addr, 0, 6); 2464 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2465 2466 // on error 2467 if (status != ERROR_CODE_SUCCESS){ 2468 #ifdef ENABLE_LE_CENTRAL 2469 if (hci_is_le_connection_type(addr_type)){ 2470 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2471 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2472 } 2473 #endif 2474 // error => outgoing connection failed 2475 if (conn != NULL){ 2476 hci_handle_connection_failed(conn, status); 2477 } 2478 } 2479 } 2480 2481 #ifdef ENABLE_CLASSIC 2482 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2483 uint8_t status = hci_event_command_status_get_status(packet); 2484 log_info("command status (inquiry), status %x", status); 2485 if (status == ERROR_CODE_SUCCESS) { 2486 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2487 } else { 2488 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2489 } 2490 } 2491 #endif 2492 break; 2493 2494 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2495 if (size < 3) return; 2496 uint16_t num_handles = packet[2]; 2497 if (size != (3u + num_handles * 4u)) return; 2498 uint16_t offset = 3; 2499 for (i=0; i<num_handles;i++){ 2500 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2501 offset += 2u; 2502 uint16_t num_packets = little_endian_read_16(packet, offset); 2503 offset += 2u; 2504 2505 conn = hci_connection_for_handle(handle); 2506 if (!conn){ 2507 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2508 continue; 2509 } 2510 2511 if (conn->num_packets_sent >= num_packets){ 2512 conn->num_packets_sent -= num_packets; 2513 } else { 2514 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2515 conn->num_packets_sent = 0; 2516 } 2517 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2518 2519 #ifdef ENABLE_CLASSIC 2520 // For SCO, we do the can_send_now_check here 2521 hci_notify_if_sco_can_send_now(); 2522 #endif 2523 } 2524 break; 2525 } 2526 2527 #ifdef ENABLE_CLASSIC 2528 case HCI_EVENT_INQUIRY_COMPLETE: 2529 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2530 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2531 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2532 hci_emit_event(event, sizeof(event), 1); 2533 } 2534 break; 2535 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2536 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2537 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2538 } 2539 break; 2540 case HCI_EVENT_CONNECTION_REQUEST: 2541 reverse_bd_addr(&packet[2], addr); 2542 link_type = (hci_link_type_t) packet[11]; 2543 if (hci_stack->gap_classic_accept_callback != NULL){ 2544 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2545 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2546 bd_addr_copy(hci_stack->decline_addr, addr); 2547 break; 2548 } 2549 } 2550 2551 // TODO: eval COD 8-10 2552 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2553 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2554 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2555 if (!conn) { 2556 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2557 } 2558 if (!conn) { 2559 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2560 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2561 bd_addr_copy(hci_stack->decline_addr, addr); 2562 break; 2563 } 2564 conn->role = HCI_ROLE_SLAVE; 2565 conn->state = RECEIVED_CONNECTION_REQUEST; 2566 // store info about eSCO 2567 if (link_type == HCI_LINK_TYPE_ESCO){ 2568 conn->remote_supported_features[0] |= 1; 2569 } 2570 hci_run(); 2571 break; 2572 2573 case HCI_EVENT_CONNECTION_COMPLETE: 2574 // Connection management 2575 reverse_bd_addr(&packet[5], addr); 2576 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2577 addr_type = BD_ADDR_TYPE_ACL; 2578 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2579 if (conn) { 2580 if (!packet[2]){ 2581 conn->state = OPEN; 2582 conn->con_handle = little_endian_read_16(packet, 3); 2583 2584 // queue get remote feature 2585 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2586 2587 // queue set supervision timeout if we're master 2588 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2589 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2590 } 2591 2592 // restart timer 2593 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2594 btstack_run_loop_add_timer(&conn->timeout); 2595 2596 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2597 2598 hci_emit_nr_connections_changed(); 2599 } else { 2600 // connection failed 2601 hci_handle_connection_failed(conn, packet[2]); 2602 } 2603 } 2604 break; 2605 2606 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2607 reverse_bd_addr(&packet[5], addr); 2608 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2609 if (packet[2]){ 2610 // connection failed 2611 break; 2612 } 2613 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2614 if (!conn) { 2615 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2616 } 2617 if (!conn) { 2618 break; 2619 } 2620 conn->state = OPEN; 2621 conn->con_handle = little_endian_read_16(packet, 3); 2622 2623 #ifdef ENABLE_SCO_OVER_HCI 2624 // update SCO 2625 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2626 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2627 } 2628 // trigger can send now 2629 if (hci_have_usb_transport()){ 2630 hci_stack->sco_can_send_now = 1; 2631 } 2632 #endif 2633 #ifdef HAVE_SCO_TRANSPORT 2634 // configure sco transport 2635 if (hci_stack->sco_transport != NULL){ 2636 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2637 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2638 } 2639 #endif 2640 break; 2641 2642 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2643 handle = little_endian_read_16(packet, 3); 2644 conn = hci_connection_for_handle(handle); 2645 if (!conn) break; 2646 if (!packet[2]){ 2647 const uint8_t * features = &packet[5]; 2648 hci_handle_remote_features_page_0(conn, features); 2649 2650 // read extended features if possible 2651 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2652 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2653 break; 2654 } 2655 } 2656 hci_handle_remote_features_received(conn); 2657 break; 2658 2659 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2660 handle = little_endian_read_16(packet, 3); 2661 conn = hci_connection_for_handle(handle); 2662 if (!conn) break; 2663 // status = ok, page = 1 2664 if (!packet[2]) { 2665 uint8_t page_number = packet[5]; 2666 uint8_t maximum_page_number = packet[6]; 2667 const uint8_t * features = &packet[7]; 2668 bool done = false; 2669 switch (page_number){ 2670 case 1: 2671 hci_handle_remote_features_page_1(conn, features); 2672 if (maximum_page_number >= 2){ 2673 // get Secure Connections (Controller) from Page 2 if available 2674 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2675 } else { 2676 // otherwise, assume SC (Controller) == SC (Host) 2677 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2678 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2679 } 2680 done = true; 2681 } 2682 break; 2683 case 2: 2684 hci_handle_remote_features_page_2(conn, features); 2685 done = true; 2686 break; 2687 default: 2688 break; 2689 } 2690 if (!done) break; 2691 } 2692 hci_handle_remote_features_received(conn); 2693 break; 2694 2695 case HCI_EVENT_LINK_KEY_REQUEST: 2696 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2697 // request handled by hci_run() 2698 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2699 break; 2700 2701 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2702 hci_event_link_key_request_get_bd_addr(packet, addr); 2703 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2704 if (!conn) break; 2705 2706 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2707 2708 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2709 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2710 // Change Connection Encryption keeps link key type 2711 if (link_key_type != CHANGED_COMBINATION_KEY){ 2712 conn->link_key_type = link_key_type; 2713 } 2714 // cache link key. link keys stored in little-endian format for legacy reasons 2715 memcpy(&conn->link_key, &packet[8], 16); 2716 2717 // only store link key: 2718 // - if bondable enabled 2719 if (hci_stack->bondable == false) break; 2720 // - if security level sufficient 2721 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2722 // - for SSP, also check if remote side requested bonding as well 2723 if (conn->link_key_type != COMBINATION_KEY){ 2724 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2725 if (!remote_bonding){ 2726 break; 2727 } 2728 } 2729 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2730 break; 2731 } 2732 2733 case HCI_EVENT_PIN_CODE_REQUEST: 2734 hci_event_pin_code_request_get_bd_addr(packet, addr); 2735 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2736 if (!conn) break; 2737 2738 hci_pairing_started(conn, false); 2739 // non-bondable mode: pin code negative reply will be sent (event is not forwarded to app) 2740 if (!hci_stack->bondable){ 2741 conn->authentication_flags |= DENY_PIN_CODE_REQUEST; 2742 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2743 hci_run(); 2744 return; 2745 } 2746 break; 2747 2748 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2749 hci_event_io_capability_response_get_bd_addr(packet, addr); 2750 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2751 if (!conn) break; 2752 2753 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_RESPONSE); 2754 hci_pairing_started(conn, true); 2755 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2756 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2757 break; 2758 2759 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2760 hci_event_io_capability_response_get_bd_addr(packet, addr); 2761 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2762 if (!conn) break; 2763 2764 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2765 hci_pairing_started(conn, true); 2766 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2767 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2768 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2769 } else { 2770 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2771 } 2772 #endif 2773 break; 2774 2775 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2776 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2777 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2778 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_REMOTE_OOB_DATA_REPLY); 2779 break; 2780 #endif 2781 2782 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2783 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2784 if (hci_ssp_validate_possible_security_level(addr) == false) break; 2785 if (!hci_stack->ssp_auto_accept) break; 2786 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2787 break; 2788 2789 case HCI_EVENT_USER_PASSKEY_REQUEST: 2790 hci_event_user_passkey_request_get_bd_addr(packet, addr); 2791 if (hci_ssp_validate_possible_security_level(addr) == false) break; 2792 if (!hci_stack->ssp_auto_accept) break; 2793 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2794 break; 2795 2796 case HCI_EVENT_MODE_CHANGE: 2797 handle = hci_event_mode_change_get_handle(packet); 2798 conn = hci_connection_for_handle(handle); 2799 if (!conn) break; 2800 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2801 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2802 break; 2803 #endif 2804 2805 case HCI_EVENT_ENCRYPTION_CHANGE: 2806 handle = hci_event_encryption_change_get_connection_handle(packet); 2807 conn = hci_connection_for_handle(handle); 2808 if (!conn) break; 2809 if (hci_event_encryption_change_get_status(packet) == 0u) { 2810 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2811 if (encryption_enabled){ 2812 if (hci_is_le_connection(conn)){ 2813 // For LE, we accept connection as encrypted 2814 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2815 } 2816 #ifdef ENABLE_CLASSIC 2817 else { 2818 2819 // dedicated bonding: send result and disconnect 2820 if (conn->bonding_flags & BONDING_DEDICATED){ 2821 conn->bonding_flags &= ~BONDING_DEDICATED; 2822 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2823 conn->bonding_status = packet[2]; 2824 break; 2825 } 2826 2827 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2828 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2829 bool connected_uses_aes_ccm = encryption_enabled == 2; 2830 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2831 log_info("SC during pairing, but only E0 now -> abort"); 2832 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2833 break; 2834 } 2835 2836 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2837 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2838 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2839 } else { 2840 // if not, pretend everything is perfect 2841 hci_handle_read_encryption_key_size_complete(conn, 16); 2842 } 2843 } 2844 #endif 2845 } else { 2846 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2847 } 2848 } 2849 2850 break; 2851 2852 #ifdef ENABLE_CLASSIC 2853 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2854 handle = hci_event_authentication_complete_get_connection_handle(packet); 2855 conn = hci_connection_for_handle(handle); 2856 if (!conn) break; 2857 2858 // clear authentication active flag 2859 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 2860 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 2861 2862 // authenticated only if auth status == 0 2863 if (hci_event_authentication_complete_get_status(packet) == 0){ 2864 // authenticated 2865 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2866 2867 // If not already encrypted, start encryption 2868 if ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0){ 2869 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2870 break; 2871 } 2872 } 2873 2874 // emit updated security level 2875 conn->requested_security_level = LEVEL_0; 2876 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2877 break; 2878 2879 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 2880 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 2881 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2882 if (!conn) break; 2883 2884 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 2885 break; 2886 #endif 2887 2888 // HCI_EVENT_DISCONNECTION_COMPLETE 2889 // has been split, to first notify stack before shutting connection down 2890 // see end of function, too. 2891 case HCI_EVENT_DISCONNECTION_COMPLETE: 2892 if (packet[2]) break; // status != 0 2893 handle = little_endian_read_16(packet, 3); 2894 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2895 if (hci_stack->acl_fragmentation_total_size > 0u) { 2896 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2897 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2898 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2899 hci_stack->acl_fragmentation_total_size = 0; 2900 hci_stack->acl_fragmentation_pos = 0; 2901 if (release_buffer){ 2902 hci_release_packet_buffer(); 2903 } 2904 } 2905 } 2906 2907 conn = hci_connection_for_handle(handle); 2908 if (!conn) break; 2909 #ifdef ENABLE_CLASSIC 2910 // pairing failed if it was ongoing 2911 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 2912 #endif 2913 // mark connection for shutdown 2914 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2915 2916 // emit dedicatd bonding event 2917 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2918 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2919 } 2920 2921 #ifdef ENABLE_BLE 2922 #ifdef ENABLE_LE_PERIPHERAL 2923 // re-enable advertisements for le connections if active 2924 if (hci_is_le_connection(conn)){ 2925 hci_update_advertisements_enabled_for_current_roles(); 2926 } 2927 #endif 2928 #endif 2929 break; 2930 2931 case HCI_EVENT_HARDWARE_ERROR: 2932 log_error("Hardware Error: 0x%02x", packet[2]); 2933 if (hci_stack->hardware_error_callback){ 2934 (*hci_stack->hardware_error_callback)(packet[2]); 2935 } else { 2936 // if no special requests, just reboot stack 2937 hci_power_control_off(); 2938 hci_power_control_on(); 2939 } 2940 break; 2941 2942 #ifdef ENABLE_CLASSIC 2943 case HCI_EVENT_ROLE_CHANGE: 2944 if (packet[2]) break; // status != 0 2945 reverse_bd_addr(&packet[3], addr); 2946 addr_type = BD_ADDR_TYPE_ACL; 2947 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2948 if (!conn) break; 2949 conn->role = packet[9]; 2950 break; 2951 #endif 2952 2953 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2954 // release packet buffer only for asynchronous transport and if there are not further fragements 2955 if (hci_transport_synchronous()) { 2956 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2957 return; // instead of break: to avoid re-entering hci_run() 2958 } 2959 hci_stack->acl_fragmentation_tx_active = 0; 2960 if (hci_stack->acl_fragmentation_total_size) break; 2961 hci_release_packet_buffer(); 2962 2963 // L2CAP receives this event via the hci_emit_event below 2964 2965 #ifdef ENABLE_CLASSIC 2966 // For SCO, we do the can_send_now_check here 2967 hci_notify_if_sco_can_send_now(); 2968 #endif 2969 break; 2970 2971 #ifdef ENABLE_CLASSIC 2972 case HCI_EVENT_SCO_CAN_SEND_NOW: 2973 // For SCO, we do the can_send_now_check here 2974 hci_stack->sco_can_send_now = 1; 2975 hci_notify_if_sco_can_send_now(); 2976 return; 2977 2978 // explode inquriy results for easier consumption 2979 case HCI_EVENT_INQUIRY_RESULT: 2980 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2981 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2982 gap_inquiry_explode(packet, size); 2983 break; 2984 #endif 2985 2986 #ifdef ENABLE_BLE 2987 case HCI_EVENT_LE_META: 2988 switch (packet[2]){ 2989 #ifdef ENABLE_LE_CENTRAL 2990 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2991 // log_info("advertising report received"); 2992 if (!hci_stack->le_scanning_enabled) break; 2993 le_handle_advertisement_report(packet, size); 2994 break; 2995 #endif 2996 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2997 event_handle_le_connection_complete(packet); 2998 break; 2999 3000 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3001 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3002 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3003 conn = hci_connection_for_handle(handle); 3004 if (!conn) break; 3005 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3006 break; 3007 3008 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3009 // connection 3010 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3011 conn = hci_connection_for_handle(handle); 3012 if (conn) { 3013 // read arguments 3014 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3015 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3016 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3017 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3018 3019 // validate against current connection parameter range 3020 le_connection_parameter_range_t existing_range; 3021 gap_get_connection_parameter_range(&existing_range); 3022 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3023 if (update_parameter){ 3024 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3025 conn->le_conn_interval_min = le_conn_interval_min; 3026 conn->le_conn_interval_max = le_conn_interval_max; 3027 conn->le_conn_latency = le_conn_latency; 3028 conn->le_supervision_timeout = le_supervision_timeout; 3029 } else { 3030 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3031 } 3032 } 3033 break; 3034 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3035 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3036 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3037 conn = hci_connection_for_handle(handle); 3038 if (conn) { 3039 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3040 } 3041 break; 3042 #endif 3043 default: 3044 break; 3045 } 3046 break; 3047 #endif 3048 case HCI_EVENT_VENDOR_SPECIFIC: 3049 // Vendor specific commands often create vendor specific event instead of num completed packets 3050 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3051 switch (hci_stack->manufacturer){ 3052 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3053 hci_stack->num_cmd_packets = 1; 3054 break; 3055 default: 3056 break; 3057 } 3058 break; 3059 default: 3060 break; 3061 } 3062 3063 handle_event_for_current_stack_state(packet, size); 3064 3065 // notify upper stack 3066 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3067 3068 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3069 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3070 handle = little_endian_read_16(packet, 3); 3071 hci_connection_t * aConn = hci_connection_for_handle(handle); 3072 // discard connection if app did not trigger a reconnect in the event handler 3073 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3074 hci_shutdown_connection(aConn); 3075 } 3076 } 3077 3078 // execute main loop 3079 hci_run(); 3080 } 3081 3082 #ifdef ENABLE_CLASSIC 3083 3084 #ifdef ENABLE_SCO_OVER_HCI 3085 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3086 static void sco_schedule_tx(hci_connection_t * conn); 3087 3088 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3089 log_debug("SCO TX Timeout"); 3090 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3091 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3092 if (!conn) return; 3093 3094 // trigger send 3095 conn->sco_tx_ready = 1; 3096 // extra packet if CVSD but SCO buffer is too short 3097 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3098 conn->sco_tx_ready++; 3099 } 3100 hci_notify_if_sco_can_send_now(); 3101 } 3102 3103 3104 #define SCO_TX_AFTER_RX_MS (6) 3105 3106 static void sco_schedule_tx(hci_connection_t * conn){ 3107 3108 uint32_t now = btstack_run_loop_get_time_ms(); 3109 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3110 int time_delta_ms = sco_tx_ms - now; 3111 3112 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3113 3114 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3115 btstack_run_loop_set_timer(timer, time_delta_ms); 3116 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3117 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3118 btstack_run_loop_add_timer(timer); 3119 } 3120 #endif 3121 3122 static void sco_handler(uint8_t * packet, uint16_t size){ 3123 // lookup connection struct 3124 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3125 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3126 if (!conn) return; 3127 3128 #ifdef ENABLE_SCO_OVER_HCI 3129 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3130 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3131 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3132 packet[2] = 0x3c; 3133 memmove(&packet[3], &packet[23], 63); 3134 size = 63; 3135 } 3136 } 3137 3138 if (hci_have_usb_transport()){ 3139 // Nothing to do 3140 } else { 3141 // 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); 3142 if (hci_stack->synchronous_flow_control_enabled == 0){ 3143 uint32_t now = btstack_run_loop_get_time_ms(); 3144 3145 if (!conn->sco_rx_valid){ 3146 // ignore first 10 packets 3147 conn->sco_rx_count++; 3148 // log_debug("sco rx count %u", conn->sco_rx_count); 3149 if (conn->sco_rx_count == 10) { 3150 // use first timestamp as is and pretent it just started 3151 conn->sco_rx_ms = now; 3152 conn->sco_rx_valid = 1; 3153 conn->sco_rx_count = 0; 3154 sco_schedule_tx(conn); 3155 } 3156 } else { 3157 // track expected arrival timme 3158 conn->sco_rx_count++; 3159 conn->sco_rx_ms += 7; 3160 int delta = (int32_t) (now - conn->sco_rx_ms); 3161 if (delta > 0){ 3162 conn->sco_rx_ms++; 3163 } 3164 // log_debug("sco rx %u", conn->sco_rx_ms); 3165 sco_schedule_tx(conn); 3166 } 3167 } 3168 } 3169 #endif 3170 3171 // deliver to app 3172 if (hci_stack->sco_packet_handler) { 3173 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3174 } 3175 3176 #ifdef HAVE_SCO_TRANSPORT 3177 // We can send one packet for each received packet 3178 conn->sco_tx_ready++; 3179 hci_notify_if_sco_can_send_now(); 3180 #endif 3181 3182 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3183 conn->num_packets_completed++; 3184 hci_stack->host_completed_packets = 1; 3185 hci_run(); 3186 #endif 3187 } 3188 #endif 3189 3190 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3191 hci_dump_packet(packet_type, 1, packet, size); 3192 switch (packet_type) { 3193 case HCI_EVENT_PACKET: 3194 event_handler(packet, size); 3195 break; 3196 case HCI_ACL_DATA_PACKET: 3197 acl_handler(packet, size); 3198 break; 3199 #ifdef ENABLE_CLASSIC 3200 case HCI_SCO_DATA_PACKET: 3201 sco_handler(packet, size); 3202 break; 3203 #endif 3204 default: 3205 break; 3206 } 3207 } 3208 3209 /** 3210 * @brief Add event packet handler. 3211 */ 3212 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3213 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3214 } 3215 3216 3217 /** Register HCI packet handlers */ 3218 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3219 hci_stack->acl_packet_handler = handler; 3220 } 3221 3222 #ifdef ENABLE_CLASSIC 3223 /** 3224 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3225 */ 3226 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3227 hci_stack->sco_packet_handler = handler; 3228 } 3229 #endif 3230 3231 static void hci_state_reset(void){ 3232 // no connections yet 3233 hci_stack->connections = NULL; 3234 3235 // keep discoverable/connectable as this has been requested by the client(s) 3236 // hci_stack->discoverable = 0; 3237 // hci_stack->connectable = 0; 3238 // hci_stack->bondable = 1; 3239 // hci_stack->own_addr_type = 0; 3240 3241 // buffer is free 3242 hci_stack->hci_packet_buffer_reserved = 0; 3243 3244 // no pending cmds 3245 hci_stack->decline_reason = 0; 3246 hci_stack->new_scan_enable_value = 0xff; 3247 3248 hci_stack->secure_connections_active = false; 3249 3250 #ifdef ENABLE_CLASSIC 3251 hci_stack->new_page_scan_interval = 0xffff; 3252 hci_stack->new_page_scan_window = 0xffff; 3253 hci_stack->new_page_scan_type = 0xff; 3254 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3255 #endif 3256 3257 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3258 hci_stack->classic_read_local_oob_data = true; 3259 #endif 3260 3261 // LE 3262 #ifdef ENABLE_BLE 3263 memset(hci_stack->le_random_address, 0, 6); 3264 hci_stack->le_random_address_set = 0; 3265 #endif 3266 #ifdef ENABLE_LE_CENTRAL 3267 hci_stack->le_scanning_active = false; 3268 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3269 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3270 hci_stack->le_whitelist_capacity = 0; 3271 #endif 3272 #ifdef ENABLE_LE_PERIPHERAL 3273 hci_stack->le_advertisements_active = false; 3274 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3275 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3276 } 3277 if (hci_stack->le_advertisements_data != NULL){ 3278 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3279 } 3280 #endif 3281 } 3282 3283 #ifdef ENABLE_CLASSIC 3284 /** 3285 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3286 */ 3287 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3288 // store and open remote device db 3289 hci_stack->link_key_db = link_key_db; 3290 if (hci_stack->link_key_db) { 3291 hci_stack->link_key_db->open(); 3292 } 3293 } 3294 #endif 3295 3296 void hci_init(const hci_transport_t *transport, const void *config){ 3297 3298 #ifdef HAVE_MALLOC 3299 if (!hci_stack) { 3300 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3301 } 3302 #else 3303 hci_stack = &hci_stack_static; 3304 #endif 3305 memset(hci_stack, 0, sizeof(hci_stack_t)); 3306 3307 // reference to use transport layer implementation 3308 hci_stack->hci_transport = transport; 3309 3310 // reference to used config 3311 hci_stack->config = config; 3312 3313 // setup pointer for outgoing packet buffer 3314 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3315 3316 // max acl payload size defined in config.h 3317 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3318 3319 // register packet handlers with transport 3320 transport->register_packet_handler(&packet_handler); 3321 3322 hci_stack->state = HCI_STATE_OFF; 3323 3324 // class of device 3325 hci_stack->class_of_device = 0x007a020c; // Smartphone 3326 3327 // bondable by default 3328 hci_stack->bondable = 1; 3329 3330 #ifdef ENABLE_CLASSIC 3331 // classic name 3332 hci_stack->local_name = default_classic_name; 3333 3334 // Master slave policy 3335 hci_stack->master_slave_policy = 1; 3336 3337 // Allow Role Switch 3338 hci_stack->allow_role_switch = 1; 3339 3340 // Default / minimum security level = 2 3341 hci_stack->gap_security_level = LEVEL_2; 3342 3343 // Default Security Mode 4 3344 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3345 3346 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3347 hci_stack->gap_required_encyrption_key_size = 7; 3348 3349 // Link Supervision Timeout 3350 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3351 3352 #endif 3353 3354 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3355 hci_stack->ssp_enable = 1; 3356 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3357 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3358 hci_stack->ssp_auto_accept = 1; 3359 3360 // Secure Connections: enable (requires support from Controller) 3361 hci_stack->secure_connections_enable = true; 3362 3363 // voice setting - signed 16 bit pcm data with CVSD over the air 3364 hci_stack->sco_voice_setting = 0x60; 3365 3366 #ifdef ENABLE_LE_CENTRAL 3367 // connection parameter to use for outgoing connections 3368 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3369 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3370 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3371 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3372 hci_stack->le_connection_latency = 4; // 4 3373 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3374 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3375 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3376 3377 // default LE Scanning 3378 hci_stack->le_scan_type = 0x1; // active 3379 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3380 hci_stack->le_scan_window = 0x30; // 30 ms 3381 #endif 3382 3383 #ifdef ENABLE_LE_PERIPHERAL 3384 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3385 #endif 3386 3387 // connection parameter range used to answer connection parameter update requests in l2cap 3388 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3389 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3390 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3391 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3392 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3393 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3394 3395 hci_state_reset(); 3396 } 3397 3398 void hci_deinit(void){ 3399 #ifdef HAVE_MALLOC 3400 if (hci_stack) { 3401 free(hci_stack); 3402 } 3403 #endif 3404 hci_stack = NULL; 3405 3406 #ifdef ENABLE_CLASSIC 3407 disable_l2cap_timeouts = 0; 3408 #endif 3409 } 3410 3411 /** 3412 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3413 */ 3414 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3415 hci_stack->chipset = chipset_driver; 3416 3417 // reset chipset driver - init is also called on power_up 3418 if (hci_stack->chipset && hci_stack->chipset->init){ 3419 hci_stack->chipset->init(hci_stack->config); 3420 } 3421 } 3422 3423 /** 3424 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3425 */ 3426 void hci_set_control(const btstack_control_t *hardware_control){ 3427 // references to used control implementation 3428 hci_stack->control = hardware_control; 3429 // init with transport config 3430 hardware_control->init(hci_stack->config); 3431 } 3432 3433 void hci_close(void){ 3434 3435 #ifdef ENABLE_CLASSIC 3436 // close remote device db 3437 if (hci_stack->link_key_db) { 3438 hci_stack->link_key_db->close(); 3439 } 3440 #endif 3441 3442 btstack_linked_list_iterator_t lit; 3443 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3444 while (btstack_linked_list_iterator_has_next(&lit)){ 3445 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3446 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3447 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3448 hci_shutdown_connection(connection); 3449 } 3450 3451 hci_power_control(HCI_POWER_OFF); 3452 3453 #ifdef HAVE_MALLOC 3454 free(hci_stack); 3455 #endif 3456 hci_stack = NULL; 3457 } 3458 3459 #ifdef HAVE_SCO_TRANSPORT 3460 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3461 hci_stack->sco_transport = sco_transport; 3462 sco_transport->register_packet_handler(&packet_handler); 3463 } 3464 #endif 3465 3466 #ifdef ENABLE_CLASSIC 3467 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3468 // validate ranage and set 3469 if (encryption_key_size < 7) return; 3470 if (encryption_key_size > 16) return; 3471 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3472 } 3473 3474 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3475 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3476 hci_stack->gap_security_mode = security_mode; 3477 return ERROR_CODE_SUCCESS; 3478 } else { 3479 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3480 } 3481 } 3482 3483 gap_security_mode_t gap_get_security_mode(void){ 3484 return hci_stack->gap_security_mode; 3485 } 3486 3487 void gap_set_security_level(gap_security_level_t security_level){ 3488 hci_stack->gap_security_level = security_level; 3489 } 3490 3491 gap_security_level_t gap_get_security_level(void){ 3492 return hci_stack->gap_security_level; 3493 } 3494 3495 void gap_set_secure_connections_only_mode(bool enable){ 3496 hci_stack->gap_secure_connections_only_mode = enable; 3497 } 3498 3499 bool gap_get_secure_connections_only_mode(void){ 3500 return hci_stack->gap_secure_connections_only_mode; 3501 } 3502 #endif 3503 3504 #ifdef ENABLE_CLASSIC 3505 void gap_set_class_of_device(uint32_t class_of_device){ 3506 hci_stack->class_of_device = class_of_device; 3507 } 3508 3509 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3510 hci_stack->default_link_policy_settings = default_link_policy_settings; 3511 } 3512 3513 void gap_set_allow_role_switch(bool allow_role_switch){ 3514 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3515 } 3516 3517 uint8_t hci_get_allow_role_switch(void){ 3518 return hci_stack->allow_role_switch; 3519 } 3520 3521 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3522 hci_stack->link_supervision_timeout = link_supervision_timeout; 3523 } 3524 3525 void hci_disable_l2cap_timeout_check(void){ 3526 disable_l2cap_timeouts = 1; 3527 } 3528 #endif 3529 3530 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3531 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3532 void hci_set_bd_addr(bd_addr_t addr){ 3533 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3534 hci_stack->custom_bd_addr_set = 1; 3535 } 3536 #endif 3537 3538 // State-Module-Driver overview 3539 // state module low-level 3540 // HCI_STATE_OFF off close 3541 // HCI_STATE_INITIALIZING, on open 3542 // HCI_STATE_WORKING, on open 3543 // HCI_STATE_HALTING, on open 3544 // HCI_STATE_SLEEPING, off/sleep close 3545 // HCI_STATE_FALLING_ASLEEP on open 3546 3547 static int hci_power_control_on(void){ 3548 3549 // power on 3550 int err = 0; 3551 if (hci_stack->control && hci_stack->control->on){ 3552 err = (*hci_stack->control->on)(); 3553 } 3554 if (err){ 3555 log_error( "POWER_ON failed"); 3556 hci_emit_hci_open_failed(); 3557 return err; 3558 } 3559 3560 // int chipset driver 3561 if (hci_stack->chipset && hci_stack->chipset->init){ 3562 hci_stack->chipset->init(hci_stack->config); 3563 } 3564 3565 // init transport 3566 if (hci_stack->hci_transport->init){ 3567 hci_stack->hci_transport->init(hci_stack->config); 3568 } 3569 3570 // open transport 3571 err = hci_stack->hci_transport->open(); 3572 if (err){ 3573 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3574 if (hci_stack->control && hci_stack->control->off){ 3575 (*hci_stack->control->off)(); 3576 } 3577 hci_emit_hci_open_failed(); 3578 return err; 3579 } 3580 return 0; 3581 } 3582 3583 static void hci_power_control_off(void){ 3584 3585 log_info("hci_power_control_off"); 3586 3587 // close low-level device 3588 hci_stack->hci_transport->close(); 3589 3590 log_info("hci_power_control_off - hci_transport closed"); 3591 3592 // power off 3593 if (hci_stack->control && hci_stack->control->off){ 3594 (*hci_stack->control->off)(); 3595 } 3596 3597 log_info("hci_power_control_off - control closed"); 3598 3599 hci_stack->state = HCI_STATE_OFF; 3600 } 3601 3602 static void hci_power_control_sleep(void){ 3603 3604 log_info("hci_power_control_sleep"); 3605 3606 #if 0 3607 // don't close serial port during sleep 3608 3609 // close low-level device 3610 hci_stack->hci_transport->close(hci_stack->config); 3611 #endif 3612 3613 // sleep mode 3614 if (hci_stack->control && hci_stack->control->sleep){ 3615 (*hci_stack->control->sleep)(); 3616 } 3617 3618 hci_stack->state = HCI_STATE_SLEEPING; 3619 } 3620 3621 static int hci_power_control_wake(void){ 3622 3623 log_info("hci_power_control_wake"); 3624 3625 // wake on 3626 if (hci_stack->control && hci_stack->control->wake){ 3627 (*hci_stack->control->wake)(); 3628 } 3629 3630 #if 0 3631 // open low-level device 3632 int err = hci_stack->hci_transport->open(hci_stack->config); 3633 if (err){ 3634 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3635 if (hci_stack->control && hci_stack->control->off){ 3636 (*hci_stack->control->off)(); 3637 } 3638 hci_emit_hci_open_failed(); 3639 return err; 3640 } 3641 #endif 3642 3643 return 0; 3644 } 3645 3646 static void hci_power_transition_to_initializing(void){ 3647 // set up state machine 3648 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3649 hci_stack->hci_packet_buffer_reserved = 0; 3650 hci_stack->state = HCI_STATE_INITIALIZING; 3651 hci_stack->substate = HCI_INIT_SEND_RESET; 3652 } 3653 3654 // returns error 3655 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3656 int err; 3657 switch (power_mode){ 3658 case HCI_POWER_ON: 3659 err = hci_power_control_on(); 3660 if (err != 0) { 3661 log_error("hci_power_control_on() error %d", err); 3662 return err; 3663 } 3664 hci_power_transition_to_initializing(); 3665 break; 3666 case HCI_POWER_OFF: 3667 // do nothing 3668 break; 3669 case HCI_POWER_SLEEP: 3670 // do nothing (with SLEEP == OFF) 3671 break; 3672 default: 3673 btstack_assert(false); 3674 break; 3675 } 3676 return ERROR_CODE_SUCCESS; 3677 } 3678 3679 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3680 switch (power_mode){ 3681 case HCI_POWER_ON: 3682 // do nothing 3683 break; 3684 case HCI_POWER_OFF: 3685 // no connections yet, just turn it off 3686 hci_power_control_off(); 3687 break; 3688 case HCI_POWER_SLEEP: 3689 // no connections yet, just turn it off 3690 hci_power_control_sleep(); 3691 break; 3692 default: 3693 btstack_assert(false); 3694 break; 3695 } 3696 return ERROR_CODE_SUCCESS; 3697 } 3698 3699 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3700 switch (power_mode){ 3701 case HCI_POWER_ON: 3702 // do nothing 3703 break; 3704 case HCI_POWER_OFF: 3705 // see hci_run 3706 hci_stack->state = HCI_STATE_HALTING; 3707 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3708 break; 3709 case HCI_POWER_SLEEP: 3710 // see hci_run 3711 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3712 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3713 break; 3714 default: 3715 btstack_assert(false); 3716 break; 3717 } 3718 return ERROR_CODE_SUCCESS; 3719 } 3720 3721 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3722 switch (power_mode){ 3723 case HCI_POWER_ON: 3724 hci_power_transition_to_initializing(); 3725 break; 3726 case HCI_POWER_OFF: 3727 // do nothing 3728 break; 3729 case HCI_POWER_SLEEP: 3730 // see hci_run 3731 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3732 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3733 break; 3734 default: 3735 btstack_assert(false); 3736 break; 3737 } 3738 return ERROR_CODE_SUCCESS; 3739 } 3740 3741 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3742 switch (power_mode){ 3743 case HCI_POWER_ON: 3744 3745 #ifdef HAVE_PLATFORM_IPHONE_OS 3746 // nothing to do, if H4 supports power management 3747 if (btstack_control_iphone_power_management_enabled()){ 3748 hci_stack->state = HCI_STATE_INITIALIZING; 3749 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3750 break; 3751 } 3752 #endif 3753 hci_power_transition_to_initializing(); 3754 break; 3755 case HCI_POWER_OFF: 3756 // see hci_run 3757 hci_stack->state = HCI_STATE_HALTING; 3758 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3759 break; 3760 case HCI_POWER_SLEEP: 3761 // do nothing 3762 break; 3763 default: 3764 btstack_assert(false); 3765 break; 3766 } 3767 return ERROR_CODE_SUCCESS; 3768 } 3769 3770 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3771 int err; 3772 switch (power_mode){ 3773 case HCI_POWER_ON: 3774 #ifdef HAVE_PLATFORM_IPHONE_OS 3775 // nothing to do, if H4 supports power management 3776 if (btstack_control_iphone_power_management_enabled()){ 3777 hci_stack->state = HCI_STATE_INITIALIZING; 3778 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3779 hci_update_scan_enable(); 3780 break; 3781 } 3782 #endif 3783 err = hci_power_control_wake(); 3784 if (err) return err; 3785 hci_power_transition_to_initializing(); 3786 break; 3787 case HCI_POWER_OFF: 3788 hci_stack->state = HCI_STATE_HALTING; 3789 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3790 break; 3791 case HCI_POWER_SLEEP: 3792 // do nothing 3793 break; 3794 default: 3795 btstack_assert(false); 3796 break; 3797 } 3798 return ERROR_CODE_SUCCESS; 3799 } 3800 3801 int hci_power_control(HCI_POWER_MODE power_mode){ 3802 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3803 int err = 0; 3804 switch (hci_stack->state){ 3805 case HCI_STATE_OFF: 3806 err = hci_power_control_state_off(power_mode); 3807 break; 3808 case HCI_STATE_INITIALIZING: 3809 err = hci_power_control_state_initializing(power_mode); 3810 break; 3811 case HCI_STATE_WORKING: 3812 err = hci_power_control_state_working(power_mode); 3813 break; 3814 case HCI_STATE_HALTING: 3815 err = hci_power_control_state_halting(power_mode); 3816 break; 3817 case HCI_STATE_FALLING_ASLEEP: 3818 err = hci_power_control_state_falling_asleep(power_mode); 3819 break; 3820 case HCI_STATE_SLEEPING: 3821 err = hci_power_control_state_sleeping(power_mode); 3822 break; 3823 default: 3824 btstack_assert(false); 3825 break; 3826 } 3827 if (err != 0){ 3828 return err; 3829 } 3830 3831 // create internal event 3832 hci_emit_state(); 3833 3834 // trigger next/first action 3835 hci_run(); 3836 3837 return 0; 3838 } 3839 3840 3841 #ifdef ENABLE_CLASSIC 3842 3843 static void hci_update_scan_enable(void){ 3844 // 2 = page scan, 1 = inq scan 3845 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3846 hci_run(); 3847 } 3848 3849 void gap_discoverable_control(uint8_t enable){ 3850 if (enable) enable = 1; // normalize argument 3851 3852 if (hci_stack->discoverable == enable){ 3853 hci_emit_discoverable_enabled(hci_stack->discoverable); 3854 return; 3855 } 3856 3857 hci_stack->discoverable = enable; 3858 hci_update_scan_enable(); 3859 } 3860 3861 void gap_connectable_control(uint8_t enable){ 3862 if (enable) enable = 1; // normalize argument 3863 3864 // don't emit event 3865 if (hci_stack->connectable == enable) return; 3866 3867 hci_stack->connectable = enable; 3868 hci_update_scan_enable(); 3869 } 3870 #endif 3871 3872 void gap_local_bd_addr(bd_addr_t address_buffer){ 3873 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3874 } 3875 3876 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3877 static void hci_host_num_completed_packets(void){ 3878 3879 // create packet manually as arrays are not supported and num_commands should not get reduced 3880 hci_reserve_packet_buffer(); 3881 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3882 3883 uint16_t size = 0; 3884 uint16_t num_handles = 0; 3885 packet[size++] = 0x35; 3886 packet[size++] = 0x0c; 3887 size++; // skip param len 3888 size++; // skip num handles 3889 3890 // add { handle, packets } entries 3891 btstack_linked_item_t * it; 3892 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3893 hci_connection_t * connection = (hci_connection_t *) it; 3894 if (connection->num_packets_completed){ 3895 little_endian_store_16(packet, size, connection->con_handle); 3896 size += 2; 3897 little_endian_store_16(packet, size, connection->num_packets_completed); 3898 size += 2; 3899 // 3900 num_handles++; 3901 connection->num_packets_completed = 0; 3902 } 3903 } 3904 3905 packet[2] = size - 3; 3906 packet[3] = num_handles; 3907 3908 hci_stack->host_completed_packets = 0; 3909 3910 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3911 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3912 3913 // release packet buffer for synchronous transport implementations 3914 if (hci_transport_synchronous()){ 3915 hci_release_packet_buffer(); 3916 hci_emit_transport_packet_sent(); 3917 } 3918 } 3919 #endif 3920 3921 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3922 UNUSED(ds); 3923 hci_stack->substate = HCI_HALTING_CLOSE; 3924 // allow packet handlers to defer final shutdown 3925 hci_emit_state(); 3926 hci_run(); 3927 } 3928 3929 static bool hci_run_acl_fragments(void){ 3930 if (hci_stack->acl_fragmentation_total_size > 0u) { 3931 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3932 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3933 if (connection) { 3934 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3935 hci_send_acl_packet_fragments(connection); 3936 return true; 3937 } 3938 } else { 3939 // connection gone -> discard further fragments 3940 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3941 hci_stack->acl_fragmentation_total_size = 0; 3942 hci_stack->acl_fragmentation_pos = 0; 3943 } 3944 } 3945 return false; 3946 } 3947 3948 #ifdef ENABLE_CLASSIC 3949 static bool hci_run_general_gap_classic(void){ 3950 3951 // decline incoming connections 3952 if (hci_stack->decline_reason){ 3953 uint8_t reason = hci_stack->decline_reason; 3954 hci_stack->decline_reason = 0; 3955 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3956 return true; 3957 } 3958 // write page scan activity 3959 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_interval != 0xffff) && hci_classic_supported()){ 3960 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 3961 hci_stack->new_page_scan_interval = 0xffff; 3962 hci_stack->new_page_scan_window = 0xffff; 3963 return true; 3964 } 3965 // write page scan type 3966 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_type != 0xff) && hci_classic_supported()){ 3967 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 3968 hci_stack->new_page_scan_type = 0xff; 3969 return true; 3970 } 3971 // send scan enable 3972 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3973 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3974 hci_stack->new_scan_enable_value = 0xff; 3975 return true; 3976 } 3977 // start/stop inquiry 3978 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3979 uint8_t duration = hci_stack->inquiry_state; 3980 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 3981 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 3982 return true; 3983 } 3984 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3985 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3986 hci_send_cmd(&hci_inquiry_cancel); 3987 return true; 3988 } 3989 // remote name request 3990 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3991 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3992 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3993 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3994 return true; 3995 } 3996 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3997 // Local OOB data 3998 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 3999 hci_stack->classic_read_local_oob_data = false; 4000 if (hci_stack->local_supported_commands[1] & 0x10u){ 4001 hci_send_cmd(&hci_read_local_extended_oob_data); 4002 } else { 4003 hci_send_cmd(&hci_read_local_oob_data); 4004 } 4005 } 4006 #endif 4007 // pairing 4008 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4009 uint8_t state = hci_stack->gap_pairing_state; 4010 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4011 uint8_t pin_code[16]; 4012 switch (state){ 4013 case GAP_PAIRING_STATE_SEND_PIN: 4014 memset(pin_code, 0, 16); 4015 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4016 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4017 break; 4018 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4019 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4020 break; 4021 case GAP_PAIRING_STATE_SEND_PASSKEY: 4022 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4023 break; 4024 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4025 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4026 break; 4027 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4028 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4029 break; 4030 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4031 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4032 break; 4033 default: 4034 break; 4035 } 4036 return true; 4037 } 4038 return false; 4039 } 4040 #endif 4041 4042 #ifdef ENABLE_BLE 4043 static bool hci_run_general_gap_le(void){ 4044 4045 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4046 4047 if (hci_stack->state != HCI_STATE_WORKING) return false; 4048 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4049 4050 4051 // Phase 1: collect what to stop 4052 4053 bool scanning_stop = false; 4054 bool connecting_stop = false; 4055 bool advertising_stop = false; 4056 4057 #ifndef ENABLE_LE_CENTRAL 4058 UNUSED(scanning_stop); 4059 UNUSED(connecting_stop); 4060 #endif 4061 #ifndef ENABLE_LE_PERIPHERAL 4062 UNUSED(advertising_stop); 4063 #endif 4064 4065 // check if whitelist needs modification 4066 bool whitelist_modification_pending = false; 4067 btstack_linked_list_iterator_t lit; 4068 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4069 while (btstack_linked_list_iterator_has_next(&lit)){ 4070 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4071 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4072 whitelist_modification_pending = true; 4073 break; 4074 } 4075 } 4076 // check if resolving list needs modification 4077 bool resolving_list_modification_pending = false; 4078 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4079 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4080 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4081 resolving_list_modification_pending = true; 4082 } 4083 #endif 4084 4085 #ifdef ENABLE_LE_CENTRAL 4086 // scanning control 4087 if (hci_stack->le_scanning_active) { 4088 // stop if: 4089 // - parameter change required 4090 // - it's disabled 4091 // - whitelist change required but used for scanning 4092 // - resolving list modified 4093 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4094 if ((hci_stack->le_scanning_param_update) || 4095 !hci_stack->le_scanning_enabled || 4096 scanning_uses_whitelist || 4097 resolving_list_modification_pending){ 4098 4099 scanning_stop = true; 4100 } 4101 } 4102 #endif 4103 4104 #ifdef ENABLE_LE_CENTRAL 4105 // connecting control 4106 bool connecting_with_whitelist; 4107 switch (hci_stack->le_connecting_state){ 4108 case LE_CONNECTING_DIRECT: 4109 case LE_CONNECTING_WHITELIST: 4110 // stop connecting if: 4111 // - connecting uses white and whitelist modification pending 4112 // - if it got disabled 4113 // - resolving list modified 4114 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4115 if ((connecting_with_whitelist && whitelist_modification_pending) || 4116 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4117 resolving_list_modification_pending) { 4118 4119 connecting_stop = true; 4120 } 4121 break; 4122 default: 4123 break; 4124 } 4125 #endif 4126 4127 #ifdef ENABLE_LE_PERIPHERAL 4128 // le advertisement control 4129 if (hci_stack->le_advertisements_active){ 4130 // stop if: 4131 // - parameter change required 4132 // - it's disabled 4133 // - whitelist change required but used for advertisement filter policy 4134 // - resolving list modified 4135 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4136 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4137 if (advertising_change || 4138 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4139 (advertising_uses_whitelist & whitelist_modification_pending) || 4140 resolving_list_modification_pending) { 4141 4142 advertising_stop = true; 4143 } 4144 } 4145 #endif 4146 4147 4148 // Phase 2: stop everything that should be off during modifications 4149 4150 #ifdef ENABLE_LE_CENTRAL 4151 if (scanning_stop){ 4152 hci_stack->le_scanning_active = false; 4153 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4154 return true; 4155 } 4156 #endif 4157 4158 #ifdef ENABLE_LE_CENTRAL 4159 if (connecting_stop){ 4160 hci_send_cmd(&hci_le_create_connection_cancel); 4161 return true; 4162 } 4163 #endif 4164 4165 #ifdef ENABLE_LE_PERIPHERAL 4166 if (advertising_stop){ 4167 hci_stack->le_advertisements_active = false; 4168 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4169 return true; 4170 } 4171 #endif 4172 4173 // Phase 3: modify 4174 4175 #ifdef ENABLE_LE_CENTRAL 4176 if (hci_stack->le_scanning_param_update){ 4177 hci_stack->le_scanning_param_update = false; 4178 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4179 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4180 return true; 4181 } 4182 #endif 4183 4184 #ifdef ENABLE_LE_PERIPHERAL 4185 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4186 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4187 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4188 hci_send_cmd(&hci_le_set_advertising_parameters, 4189 hci_stack->le_advertisements_interval_min, 4190 hci_stack->le_advertisements_interval_max, 4191 hci_stack->le_advertisements_type, 4192 hci_stack->le_advertisements_own_addr_type, 4193 hci_stack->le_advertisements_direct_address_type, 4194 hci_stack->le_advertisements_direct_address, 4195 hci_stack->le_advertisements_channel_map, 4196 hci_stack->le_advertisements_filter_policy); 4197 return true; 4198 } 4199 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4200 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4201 uint8_t adv_data_clean[31]; 4202 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4203 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4204 hci_stack->le_advertisements_data_len); 4205 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4206 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4207 return true; 4208 } 4209 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4210 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4211 uint8_t scan_data_clean[31]; 4212 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4213 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4214 hci_stack->le_scan_response_data_len); 4215 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4216 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4217 return true; 4218 } 4219 #endif 4220 4221 4222 #ifdef ENABLE_LE_CENTRAL 4223 // if connect with whitelist was active and is not cancelled yet, wait until next time 4224 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4225 #endif 4226 4227 // LE Whitelist Management 4228 if (whitelist_modification_pending){ 4229 // add/remove entries 4230 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4231 while (btstack_linked_list_iterator_has_next(&lit)){ 4232 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4233 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4234 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4235 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4236 return true; 4237 } 4238 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4239 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4240 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4241 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4242 return true; 4243 } 4244 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4245 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4246 btstack_memory_whitelist_entry_free(entry); 4247 } 4248 } 4249 } 4250 4251 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4252 // LE Resolving List Management 4253 if (resolving_list_supported) { 4254 uint16_t i; 4255 switch (hci_stack->le_resolving_list_state) { 4256 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4257 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4258 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4259 return true; 4260 case LE_RESOLVING_LIST_READ_SIZE: 4261 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4262 hci_send_cmd(&hci_le_read_resolving_list_size); 4263 return true; 4264 case LE_RESOLVING_LIST_SEND_CLEAR: 4265 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4266 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4267 sizeof(hci_stack->le_resolving_list_add_entries)); 4268 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4269 sizeof(hci_stack->le_resolving_list_remove_entries)); 4270 hci_send_cmd(&hci_le_clear_resolving_list); 4271 return true; 4272 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4273 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4274 uint8_t offset = i >> 3; 4275 uint8_t mask = 1 << (i & 7); 4276 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4277 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4278 bd_addr_t peer_identity_addreses; 4279 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4280 sm_key_t peer_irk; 4281 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4282 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4283 4284 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4285 // trigger whitelist entry 'update' (work around for controller bug) 4286 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4287 while (btstack_linked_list_iterator_has_next(&lit)) { 4288 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4289 if (entry->address_type != peer_identity_addr_type) continue; 4290 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4291 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4292 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4293 } 4294 #endif 4295 4296 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4297 peer_identity_addreses); 4298 return true; 4299 } 4300 4301 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4302 4303 /* fall through */ 4304 4305 case LE_RESOLVING_LIST_ADD_ENTRIES: 4306 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4307 uint8_t offset = i >> 3; 4308 uint8_t mask = 1 << (i & 7); 4309 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4310 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4311 bd_addr_t peer_identity_addreses; 4312 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4313 sm_key_t peer_irk; 4314 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4315 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4316 const uint8_t *local_irk = gap_get_persistent_irk(); 4317 // command uses format specifier 'P' that stores 16-byte value without flip 4318 uint8_t local_irk_flipped[16]; 4319 uint8_t peer_irk_flipped[16]; 4320 reverse_128(local_irk, local_irk_flipped); 4321 reverse_128(peer_irk, peer_irk_flipped); 4322 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4323 peer_irk_flipped, local_irk_flipped); 4324 return true; 4325 } 4326 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4327 break; 4328 4329 default: 4330 break; 4331 } 4332 } 4333 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4334 #endif 4335 4336 // Phase 4: restore state 4337 4338 #ifdef ENABLE_LE_CENTRAL 4339 // re-start scanning 4340 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4341 hci_stack->le_scanning_active = true; 4342 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4343 return true; 4344 } 4345 #endif 4346 4347 #ifdef ENABLE_LE_CENTRAL 4348 // re-start connecting 4349 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4350 bd_addr_t null_addr; 4351 memset(null_addr, 0, 6); 4352 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4353 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4354 hci_send_cmd(&hci_le_create_connection, 4355 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4356 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4357 1, // use whitelist 4358 0, // peer address type 4359 null_addr, // peer bd addr 4360 hci_stack->le_connection_own_addr_type, // our addr type: 4361 hci_stack->le_connection_interval_min, // conn interval min 4362 hci_stack->le_connection_interval_max, // conn interval max 4363 hci_stack->le_connection_latency, // conn latency 4364 hci_stack->le_supervision_timeout, // conn latency 4365 hci_stack->le_minimum_ce_length, // min ce length 4366 hci_stack->le_maximum_ce_length // max ce length 4367 ); 4368 return true; 4369 } 4370 #endif 4371 4372 #ifdef ENABLE_LE_PERIPHERAL 4373 // re-start advertising 4374 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4375 // check if advertisements should be enabled given 4376 hci_stack->le_advertisements_active = true; 4377 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_advertisements_own_address); 4378 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4379 return true; 4380 } 4381 #endif 4382 4383 return false; 4384 } 4385 #endif 4386 4387 static bool hci_run_general_pending_commands(void){ 4388 btstack_linked_item_t * it; 4389 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4390 hci_connection_t * connection = (hci_connection_t *) it; 4391 4392 switch(connection->state){ 4393 case SEND_CREATE_CONNECTION: 4394 switch(connection->address_type){ 4395 #ifdef ENABLE_CLASSIC 4396 case BD_ADDR_TYPE_ACL: 4397 log_info("sending hci_create_connection"); 4398 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4399 break; 4400 #endif 4401 default: 4402 #ifdef ENABLE_BLE 4403 #ifdef ENABLE_LE_CENTRAL 4404 log_info("sending hci_le_create_connection"); 4405 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4406 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4407 hci_send_cmd(&hci_le_create_connection, 4408 hci_stack->le_connection_scan_interval, // conn scan interval 4409 hci_stack->le_connection_scan_window, // conn scan windows 4410 0, // don't use whitelist 4411 connection->address_type, // peer address type 4412 connection->address, // peer bd addr 4413 hci_stack->le_connection_own_addr_type, // our addr type: 4414 hci_stack->le_connection_interval_min, // conn interval min 4415 hci_stack->le_connection_interval_max, // conn interval max 4416 hci_stack->le_connection_latency, // conn latency 4417 hci_stack->le_supervision_timeout, // conn latency 4418 hci_stack->le_minimum_ce_length, // min ce length 4419 hci_stack->le_maximum_ce_length // max ce length 4420 ); 4421 connection->state = SENT_CREATE_CONNECTION; 4422 #endif 4423 #endif 4424 break; 4425 } 4426 return true; 4427 4428 #ifdef ENABLE_CLASSIC 4429 case RECEIVED_CONNECTION_REQUEST: 4430 connection->role = HCI_ROLE_SLAVE; 4431 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4432 log_info("sending hci_accept_connection_request"); 4433 connection->state = ACCEPTED_CONNECTION_REQUEST; 4434 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4435 } 4436 return true; 4437 #endif 4438 4439 #ifdef ENABLE_BLE 4440 #ifdef ENABLE_LE_CENTRAL 4441 case SEND_CANCEL_CONNECTION: 4442 connection->state = SENT_CANCEL_CONNECTION; 4443 hci_send_cmd(&hci_le_create_connection_cancel); 4444 return true; 4445 #endif 4446 #endif 4447 case SEND_DISCONNECT: 4448 connection->state = SENT_DISCONNECT; 4449 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4450 return true; 4451 4452 default: 4453 break; 4454 } 4455 4456 // no further commands if connection is about to get shut down 4457 if (connection->state == SENT_DISCONNECT) continue; 4458 4459 if (connection->authentication_flags & READ_RSSI){ 4460 connectionClearAuthenticationFlags(connection, READ_RSSI); 4461 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4462 return true; 4463 } 4464 4465 #ifdef ENABLE_CLASSIC 4466 4467 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4468 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4469 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4470 return true; 4471 } 4472 4473 // Handling link key request requires remote supported features 4474 if ( ((connection->authentication_flags & HANDLE_LINK_KEY_REQUEST) != 0) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4475 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4476 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4477 4478 // lookup link key using cached key first 4479 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4480 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4481 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4482 } 4483 4484 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4485 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4486 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(connection->link_key_type) == 1) && !sc_enabled_remote; 4487 if (sc_downgrade){ 4488 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4489 connection->state = SENT_DISCONNECT; 4490 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4491 return true; 4492 } 4493 4494 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4495 if (have_link_key && security_level_sufficient){ 4496 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4497 } else { 4498 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4499 } 4500 return true; 4501 } 4502 4503 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4504 log_info("denying to pin request"); 4505 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4506 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4507 return true; 4508 } 4509 4510 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4511 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4512 // set authentication requirements: 4513 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4514 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4515 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4516 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4517 authreq |= 1; 4518 } 4519 bool bonding = hci_stack->bondable; 4520 if (connection->authentication_flags & RECV_IO_CAPABILITIES_RESPONSE){ 4521 // if we have received IO Cap Response, we're in responder role 4522 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4523 if (bonding && !remote_bonding){ 4524 log_info("Remote not bonding, dropping local flag"); 4525 bonding = false; 4526 } 4527 } 4528 if (bonding){ 4529 if (connection->bonding_flags & BONDING_DEDICATED){ 4530 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4531 } else { 4532 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4533 } 4534 } 4535 uint8_t have_oob_data = 0; 4536 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4537 if (connection->classic_oob_c_192 != NULL){ 4538 have_oob_data |= 1; 4539 } 4540 if (connection->classic_oob_c_256 != NULL){ 4541 have_oob_data |= 2; 4542 } 4543 #endif 4544 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4545 return true; 4546 } 4547 4548 if (connection->authentication_flags & SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4549 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4550 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4551 return true; 4552 } 4553 4554 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4555 if (connection->authentication_flags & SEND_REMOTE_OOB_DATA_REPLY){ 4556 connectionClearAuthenticationFlags(connection, SEND_REMOTE_OOB_DATA_REPLY); 4557 const uint8_t zero[16] = { 0 }; 4558 const uint8_t * r_192 = zero; 4559 const uint8_t * c_192 = zero; 4560 const uint8_t * r_256 = zero; 4561 const uint8_t * c_256 = zero; 4562 // verify P-256 OOB 4563 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4564 c_256 = connection->classic_oob_c_256; 4565 if (connection->classic_oob_r_256 != NULL) { 4566 r_256 = connection->classic_oob_r_256; 4567 } 4568 } 4569 // verify P-192 OOB 4570 if ((connection->classic_oob_c_192 != NULL)) { 4571 c_192 = connection->classic_oob_c_192; 4572 if (connection->classic_oob_r_192 != NULL) { 4573 r_192 = connection->classic_oob_r_192; 4574 } 4575 } 4576 // Reply 4577 if (c_256 != zero) { 4578 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4579 } else if (c_192 != zero){ 4580 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4581 } else { 4582 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4583 } 4584 return true; 4585 } 4586 #endif 4587 4588 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4589 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4590 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4591 return true; 4592 } 4593 4594 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4595 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4596 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4597 return true; 4598 } 4599 4600 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4601 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4602 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4603 return true; 4604 } 4605 4606 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4607 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4608 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4609 return true; 4610 } 4611 4612 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4613 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4614 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4615 return true; 4616 } 4617 4618 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4619 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4620 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4621 connection->state = SENT_DISCONNECT; 4622 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4623 return true; 4624 } 4625 4626 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4627 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4628 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4629 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4630 return true; 4631 } 4632 4633 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4634 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4635 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4636 return true; 4637 } 4638 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4639 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4640 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4641 return true; 4642 } 4643 #endif 4644 4645 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4646 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4647 #ifdef ENABLE_CLASSIC 4648 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4649 #endif 4650 if (connection->state != SENT_DISCONNECT){ 4651 connection->state = SENT_DISCONNECT; 4652 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4653 return true; 4654 } 4655 } 4656 4657 #ifdef ENABLE_CLASSIC 4658 uint16_t sniff_min_interval; 4659 switch (connection->sniff_min_interval){ 4660 case 0: 4661 break; 4662 case 0xffff: 4663 connection->sniff_min_interval = 0; 4664 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4665 return true; 4666 default: 4667 sniff_min_interval = connection->sniff_min_interval; 4668 connection->sniff_min_interval = 0; 4669 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4670 return true; 4671 } 4672 4673 if (connection->sniff_subrating_max_latency != 0xffff){ 4674 uint16_t max_latency = connection->sniff_subrating_max_latency; 4675 connection->sniff_subrating_max_latency = 0; 4676 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4677 return true; 4678 } 4679 4680 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4681 uint8_t service_type = (uint8_t) connection->qos_service_type; 4682 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4683 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); 4684 return true; 4685 } 4686 4687 if (connection->request_role != HCI_ROLE_INVALID){ 4688 hci_role_t role = connection->request_role; 4689 connection->request_role = HCI_ROLE_INVALID; 4690 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4691 return true; 4692 } 4693 #endif 4694 4695 #ifdef ENABLE_BLE 4696 switch (connection->le_con_parameter_update_state){ 4697 // response to L2CAP CON PARAMETER UPDATE REQUEST 4698 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4699 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4700 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4701 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4702 0x0000, 0xffff); 4703 return true; 4704 case CON_PARAMETER_UPDATE_REPLY: 4705 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4706 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4707 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4708 0x0000, 0xffff); 4709 return true; 4710 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4711 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4712 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4713 return true; 4714 default: 4715 break; 4716 } 4717 if (connection->le_phy_update_all_phys != 0xffu){ 4718 uint8_t all_phys = connection->le_phy_update_all_phys; 4719 connection->le_phy_update_all_phys = 0xff; 4720 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); 4721 return true; 4722 } 4723 #endif 4724 } 4725 return false; 4726 } 4727 4728 static void hci_run(void){ 4729 4730 bool done; 4731 4732 // send continuation fragments first, as they block the prepared packet buffer 4733 done = hci_run_acl_fragments(); 4734 if (done) return; 4735 4736 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4737 // send host num completed packets next as they don't require num_cmd_packets > 0 4738 if (!hci_can_send_comand_packet_transport()) return; 4739 if (hci_stack->host_completed_packets){ 4740 hci_host_num_completed_packets(); 4741 return; 4742 } 4743 #endif 4744 4745 if (!hci_can_send_command_packet_now()) return; 4746 4747 // global/non-connection oriented commands 4748 4749 4750 #ifdef ENABLE_CLASSIC 4751 // general gap classic 4752 done = hci_run_general_gap_classic(); 4753 if (done) return; 4754 #endif 4755 4756 #ifdef ENABLE_BLE 4757 // general gap le 4758 done = hci_run_general_gap_le(); 4759 if (done) return; 4760 #endif 4761 4762 // send pending HCI commands 4763 done = hci_run_general_pending_commands(); 4764 if (done) return; 4765 4766 // stack state sub statemachines 4767 hci_connection_t * connection; 4768 switch (hci_stack->state){ 4769 case HCI_STATE_INITIALIZING: 4770 hci_initializing_run(); 4771 break; 4772 4773 case HCI_STATE_HALTING: 4774 4775 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4776 switch (hci_stack->substate){ 4777 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4778 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4779 4780 #ifdef ENABLE_BLE 4781 #ifdef ENABLE_LE_CENTRAL 4782 // free whitelist entries 4783 { 4784 btstack_linked_list_iterator_t lit; 4785 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4786 while (btstack_linked_list_iterator_has_next(&lit)){ 4787 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4788 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4789 btstack_memory_whitelist_entry_free(entry); 4790 } 4791 } 4792 #endif 4793 #endif 4794 // close all open connections 4795 connection = (hci_connection_t *) hci_stack->connections; 4796 if (connection){ 4797 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4798 if (!hci_can_send_command_packet_now()) return; 4799 4800 // check state 4801 if (connection->state == SENT_DISCONNECT) return; 4802 connection->state = SENT_DISCONNECT; 4803 4804 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4805 4806 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4807 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4808 4809 // ... which would be ignored anyway as we shutdown (free) the connection now 4810 hci_shutdown_connection(connection); 4811 4812 // finally, send the disconnect command 4813 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4814 return; 4815 } 4816 4817 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4818 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4819 log_info("HCI_STATE_HALTING: wait 50 ms"); 4820 hci_stack->substate = HCI_HALTING_W4_TIMER; 4821 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4822 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4823 btstack_run_loop_add_timer(&hci_stack->timeout); 4824 break; 4825 } 4826 4827 /* fall through */ 4828 4829 case HCI_HALTING_CLOSE: 4830 log_info("HCI_STATE_HALTING, calling off"); 4831 4832 // switch mode 4833 hci_power_control_off(); 4834 4835 log_info("HCI_STATE_HALTING, emitting state"); 4836 hci_emit_state(); 4837 log_info("HCI_STATE_HALTING, done"); 4838 break; 4839 4840 case HCI_HALTING_W4_TIMER: 4841 // keep waiting 4842 4843 break; 4844 default: 4845 break; 4846 } 4847 4848 break; 4849 4850 case HCI_STATE_FALLING_ASLEEP: 4851 switch(hci_stack->substate) { 4852 case HCI_FALLING_ASLEEP_DISCONNECT: 4853 log_info("HCI_STATE_FALLING_ASLEEP"); 4854 // close all open connections 4855 connection = (hci_connection_t *) hci_stack->connections; 4856 4857 #ifdef HAVE_PLATFORM_IPHONE_OS 4858 // don't close connections, if H4 supports power management 4859 if (btstack_control_iphone_power_management_enabled()){ 4860 connection = NULL; 4861 } 4862 #endif 4863 if (connection){ 4864 4865 // send disconnect 4866 if (!hci_can_send_command_packet_now()) return; 4867 4868 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4869 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4870 4871 // send disconnected event right away - causes higher layer connections to get closed, too. 4872 hci_shutdown_connection(connection); 4873 return; 4874 } 4875 4876 if (hci_classic_supported()){ 4877 // disable page and inquiry scan 4878 if (!hci_can_send_command_packet_now()) return; 4879 4880 log_info("HCI_STATE_HALTING, disabling inq scans"); 4881 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4882 4883 // continue in next sub state 4884 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4885 break; 4886 } 4887 4888 /* fall through */ 4889 4890 case HCI_FALLING_ASLEEP_COMPLETE: 4891 log_info("HCI_STATE_HALTING, calling sleep"); 4892 #ifdef HAVE_PLATFORM_IPHONE_OS 4893 // don't actually go to sleep, if H4 supports power management 4894 if (btstack_control_iphone_power_management_enabled()){ 4895 // SLEEP MODE reached 4896 hci_stack->state = HCI_STATE_SLEEPING; 4897 hci_emit_state(); 4898 break; 4899 } 4900 #endif 4901 // switch mode 4902 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4903 hci_emit_state(); 4904 break; 4905 4906 default: 4907 break; 4908 } 4909 break; 4910 4911 default: 4912 break; 4913 } 4914 } 4915 4916 int hci_send_cmd_packet(uint8_t *packet, int size){ 4917 // house-keeping 4918 4919 #ifdef ENABLE_CLASSIC 4920 bd_addr_t addr; 4921 hci_connection_t * conn; 4922 #endif 4923 #ifdef ENABLE_LE_CENTRAL 4924 uint8_t initiator_filter_policy; 4925 #endif 4926 4927 uint16_t opcode = little_endian_read_16(packet, 0); 4928 switch (opcode) { 4929 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4930 hci_stack->loopback_mode = packet[3]; 4931 break; 4932 4933 #ifdef ENABLE_CLASSIC 4934 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4935 reverse_bd_addr(&packet[3], addr); 4936 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4937 4938 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4939 if (!conn) { 4940 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4941 if (!conn) { 4942 // notify client that alloc failed 4943 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4944 return -1; // packet not sent to controller 4945 } 4946 conn->state = SEND_CREATE_CONNECTION; 4947 conn->role = HCI_ROLE_MASTER; 4948 } 4949 log_info("conn state %u", conn->state); 4950 switch (conn->state) { 4951 // if connection active exists 4952 case OPEN: 4953 // and OPEN, emit connection complete command 4954 hci_emit_connection_complete(addr, conn->con_handle, 0); 4955 return -1; // packet not sent to controller 4956 case RECEIVED_DISCONNECTION_COMPLETE: 4957 // create connection triggered in disconnect complete event, let's do it now 4958 break; 4959 case SEND_CREATE_CONNECTION: 4960 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4961 break; 4962 default: 4963 // otherwise, just ignore as it is already in the open process 4964 return -1; // packet not sent to controller 4965 } 4966 conn->state = SENT_CREATE_CONNECTION; 4967 4968 // track outgoing connection 4969 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4970 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4971 break; 4972 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4973 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4974 break; 4975 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4976 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4977 break; 4978 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4979 if (hci_stack->link_key_db) { 4980 reverse_bd_addr(&packet[3], addr); 4981 hci_stack->link_key_db->delete_link_key(addr); 4982 } 4983 break; 4984 4985 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 4986 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4987 // setup_synchronous_connection? Voice setting at offset 22 4988 // TODO: compare to current setting if sco connection already active 4989 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4990 break; 4991 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4992 // accept_synchronus_connection? Voice setting at offset 18 4993 // TODO: compare to current setting if sco connection already active 4994 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4995 break; 4996 #endif 4997 #endif 4998 4999 #ifdef ENABLE_BLE 5000 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5001 hci_stack->le_random_address_set = 1; 5002 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5003 break; 5004 #ifdef ENABLE_LE_PERIPHERAL 5005 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5006 hci_stack->le_advertisements_active = packet[3] != 0; 5007 break; 5008 #endif 5009 #ifdef ENABLE_LE_CENTRAL 5010 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5011 // white list used? 5012 initiator_filter_policy = packet[7]; 5013 switch (initiator_filter_policy) { 5014 case 0: 5015 // whitelist not used 5016 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5017 break; 5018 case 1: 5019 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5020 break; 5021 default: 5022 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5023 break; 5024 } 5025 // track outgoing connection 5026 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5027 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5028 break; 5029 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5030 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5031 break; 5032 #endif 5033 #endif 5034 default: 5035 break; 5036 } 5037 5038 hci_stack->num_cmd_packets--; 5039 5040 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5041 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5042 } 5043 5044 // disconnect because of security block 5045 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5046 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5047 if (!connection) return; 5048 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5049 } 5050 5051 5052 // Configure Secure Simple Pairing 5053 5054 #ifdef ENABLE_CLASSIC 5055 5056 // enable will enable SSP during init 5057 void gap_ssp_set_enable(int enable){ 5058 hci_stack->ssp_enable = enable; 5059 } 5060 5061 static int hci_local_ssp_activated(void){ 5062 return gap_ssp_supported() && hci_stack->ssp_enable; 5063 } 5064 5065 // if set, BTstack will respond to io capability request using authentication requirement 5066 void gap_ssp_set_io_capability(int io_capability){ 5067 hci_stack->ssp_io_capability = io_capability; 5068 } 5069 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5070 hci_stack->ssp_authentication_requirement = authentication_requirement; 5071 } 5072 5073 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5074 void gap_ssp_set_auto_accept(int auto_accept){ 5075 hci_stack->ssp_auto_accept = auto_accept; 5076 } 5077 5078 void gap_secure_connections_enable(bool enable){ 5079 hci_stack->secure_connections_enable = enable; 5080 } 5081 5082 #endif 5083 5084 // va_list part of hci_send_cmd 5085 int hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5086 if (!hci_can_send_command_packet_now()){ 5087 log_error("hci_send_cmd called but cannot send packet now"); 5088 return 0; 5089 } 5090 5091 // for HCI INITIALIZATION 5092 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5093 hci_stack->last_cmd_opcode = cmd->opcode; 5094 5095 hci_reserve_packet_buffer(); 5096 uint8_t * packet = hci_stack->hci_packet_buffer; 5097 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5098 int err = hci_send_cmd_packet(packet, size); 5099 5100 // release packet buffer on error or for synchronous transport implementations 5101 if ((err < 0) || hci_transport_synchronous()){ 5102 hci_release_packet_buffer(); 5103 hci_emit_transport_packet_sent(); 5104 } 5105 5106 return err; 5107 } 5108 5109 /** 5110 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5111 */ 5112 int hci_send_cmd(const hci_cmd_t * cmd, ...){ 5113 va_list argptr; 5114 va_start(argptr, cmd); 5115 int res = hci_send_cmd_va_arg(cmd, argptr); 5116 va_end(argptr); 5117 return res; 5118 } 5119 5120 // Create various non-HCI events. 5121 // TODO: generalize, use table similar to hci_create_command 5122 5123 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5124 // dump packet 5125 if (dump) { 5126 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5127 } 5128 5129 // dispatch to all event handlers 5130 btstack_linked_list_iterator_t it; 5131 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5132 while (btstack_linked_list_iterator_has_next(&it)){ 5133 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5134 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5135 } 5136 } 5137 5138 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5139 if (!hci_stack->acl_packet_handler) return; 5140 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5141 } 5142 5143 #ifdef ENABLE_CLASSIC 5144 static void hci_notify_if_sco_can_send_now(void){ 5145 // notify SCO sender if waiting 5146 if (!hci_stack->sco_waiting_for_can_send_now) return; 5147 if (hci_can_send_sco_packet_now()){ 5148 hci_stack->sco_waiting_for_can_send_now = 0; 5149 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5150 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5151 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5152 } 5153 } 5154 5155 // parsing end emitting has been merged to reduce code size 5156 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5157 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5158 5159 uint8_t * eir_data; 5160 ad_context_t context; 5161 const uint8_t * name; 5162 uint8_t name_len; 5163 5164 if (size < 3) return; 5165 5166 int event_type = hci_event_packet_get_type(packet); 5167 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5168 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5169 5170 switch (event_type){ 5171 case HCI_EVENT_INQUIRY_RESULT: 5172 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5173 if (size != (3 + (num_responses * 14))) return; 5174 break; 5175 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5176 if (size != 257) return; 5177 if (num_responses != 1) return; 5178 break; 5179 default: 5180 return; 5181 } 5182 5183 // event[1] is set at the end 5184 int i; 5185 for (i=0; i<num_responses;i++){ 5186 memset(event, 0, sizeof(event)); 5187 event[0] = GAP_EVENT_INQUIRY_RESULT; 5188 uint8_t event_size = 18; // if name is not set by EIR 5189 5190 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5191 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5192 (void)memcpy(&event[9], 5193 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5194 3); // class of device 5195 (void)memcpy(&event[12], 5196 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5197 2); // clock offset 5198 5199 switch (event_type){ 5200 case HCI_EVENT_INQUIRY_RESULT: 5201 // 14,15,16,17 = 0, size 18 5202 break; 5203 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5204 event[14] = 1; 5205 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5206 // 16,17 = 0, size 18 5207 break; 5208 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5209 event[14] = 1; 5210 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5211 // EIR packets only contain a single inquiry response 5212 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5213 name = NULL; 5214 // Iterate over EIR data 5215 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5216 uint8_t data_type = ad_iterator_get_data_type(&context); 5217 uint8_t data_size = ad_iterator_get_data_len(&context); 5218 const uint8_t * data = ad_iterator_get_data(&context); 5219 // Prefer Complete Local Name over Shortened Local Name 5220 switch (data_type){ 5221 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5222 if (name) continue; 5223 /* fall through */ 5224 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5225 name = data; 5226 name_len = data_size; 5227 break; 5228 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5229 if (data_size != 8) break; 5230 event[16] = 1; 5231 memcpy(&event[17], data, 8); 5232 break; 5233 default: 5234 break; 5235 } 5236 } 5237 if (name){ 5238 event[25] = 1; 5239 // truncate name if needed 5240 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5241 event[26] = len; 5242 (void)memcpy(&event[27], name, len); 5243 event_size += len; 5244 } 5245 break; 5246 default: 5247 return; 5248 } 5249 event[1] = event_size - 2; 5250 hci_emit_event(event, event_size, 1); 5251 } 5252 } 5253 #endif 5254 5255 void hci_emit_state(void){ 5256 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5257 uint8_t event[3]; 5258 event[0] = BTSTACK_EVENT_STATE; 5259 event[1] = sizeof(event) - 2u; 5260 event[2] = hci_stack->state; 5261 hci_emit_event(event, sizeof(event), 1); 5262 } 5263 5264 #ifdef ENABLE_CLASSIC 5265 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5266 uint8_t event[13]; 5267 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5268 event[1] = sizeof(event) - 2; 5269 event[2] = status; 5270 little_endian_store_16(event, 3, con_handle); 5271 reverse_bd_addr(address, &event[5]); 5272 event[11] = 1; // ACL connection 5273 event[12] = 0; // encryption disabled 5274 hci_emit_event(event, sizeof(event), 1); 5275 } 5276 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5277 if (disable_l2cap_timeouts) return; 5278 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5279 uint8_t event[4]; 5280 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5281 event[1] = sizeof(event) - 2; 5282 little_endian_store_16(event, 2, conn->con_handle); 5283 hci_emit_event(event, sizeof(event), 1); 5284 } 5285 #endif 5286 5287 #ifdef ENABLE_BLE 5288 #ifdef ENABLE_LE_CENTRAL 5289 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){ 5290 uint8_t event[21]; 5291 event[0] = HCI_EVENT_LE_META; 5292 event[1] = sizeof(event) - 2u; 5293 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5294 event[3] = status; 5295 little_endian_store_16(event, 4, con_handle); 5296 event[6] = 0; // TODO: role 5297 event[7] = address_type; 5298 reverse_bd_addr(address, &event[8]); 5299 little_endian_store_16(event, 14, 0); // interval 5300 little_endian_store_16(event, 16, 0); // latency 5301 little_endian_store_16(event, 18, 0); // supervision timeout 5302 event[20] = 0; // master clock accuracy 5303 hci_emit_event(event, sizeof(event), 1); 5304 } 5305 #endif 5306 #endif 5307 5308 static void hci_emit_transport_packet_sent(void){ 5309 // notify upper stack that it might be possible to send again 5310 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5311 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5312 } 5313 5314 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5315 uint8_t event[6]; 5316 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5317 event[1] = sizeof(event) - 2u; 5318 event[2] = 0; // status = OK 5319 little_endian_store_16(event, 3, con_handle); 5320 event[5] = reason; 5321 hci_emit_event(event, sizeof(event), 1); 5322 } 5323 5324 static void hci_emit_nr_connections_changed(void){ 5325 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5326 uint8_t event[3]; 5327 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5328 event[1] = sizeof(event) - 2u; 5329 event[2] = nr_hci_connections(); 5330 hci_emit_event(event, sizeof(event), 1); 5331 } 5332 5333 static void hci_emit_hci_open_failed(void){ 5334 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5335 uint8_t event[2]; 5336 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5337 event[1] = sizeof(event) - 2u; 5338 hci_emit_event(event, sizeof(event), 1); 5339 } 5340 5341 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5342 log_info("hci_emit_dedicated_bonding_result %u ", status); 5343 uint8_t event[9]; 5344 int pos = 0; 5345 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5346 event[pos++] = sizeof(event) - 2u; 5347 event[pos++] = status; 5348 reverse_bd_addr(address, &event[pos]); 5349 hci_emit_event(event, sizeof(event), 1); 5350 } 5351 5352 5353 #ifdef ENABLE_CLASSIC 5354 5355 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5356 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5357 uint8_t event[5]; 5358 int pos = 0; 5359 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5360 event[pos++] = sizeof(event) - 2; 5361 little_endian_store_16(event, 2, con_handle); 5362 pos += 2; 5363 event[pos++] = level; 5364 hci_emit_event(event, sizeof(event), 1); 5365 } 5366 5367 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5368 if (!connection) return LEVEL_0; 5369 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5370 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5371 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5372 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5373 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5374 // LEVEL 4 always requires 128 bit encrytion key size 5375 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5376 security_level = LEVEL_3; 5377 } 5378 return security_level; 5379 } 5380 5381 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5382 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5383 uint8_t event[3]; 5384 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5385 event[1] = sizeof(event) - 2; 5386 event[2] = enabled; 5387 hci_emit_event(event, sizeof(event), 1); 5388 } 5389 5390 // query if remote side supports eSCO 5391 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5392 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5393 if (!connection) return 0; 5394 return (connection->remote_supported_features[0] & 1) != 0; 5395 } 5396 5397 static bool hci_ssp_supported(hci_connection_t * connection){ 5398 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5399 return (connection->bonding_flags & mask) == mask; 5400 } 5401 5402 // query if remote side supports SSP 5403 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5404 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5405 if (!connection) return 0; 5406 return hci_ssp_supported(connection) ? 1 : 0; 5407 } 5408 5409 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5410 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5411 } 5412 5413 // GAP API 5414 /** 5415 * @bbrief enable/disable bonding. default is enabled 5416 * @praram enabled 5417 */ 5418 void gap_set_bondable_mode(int enable){ 5419 hci_stack->bondable = enable ? 1 : 0; 5420 } 5421 /** 5422 * @brief Get bondable mode. 5423 * @return 1 if bondable 5424 */ 5425 int gap_get_bondable_mode(void){ 5426 return hci_stack->bondable; 5427 } 5428 5429 /** 5430 * @brief map link keys to security levels 5431 */ 5432 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5433 switch (link_key_type){ 5434 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5435 return LEVEL_4; 5436 case COMBINATION_KEY: 5437 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5438 return LEVEL_3; 5439 default: 5440 return LEVEL_2; 5441 } 5442 } 5443 5444 /** 5445 * @brief map link keys to secure connection yes/no 5446 */ 5447 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5448 switch (link_key_type){ 5449 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5450 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5451 return 1; 5452 default: 5453 return 0; 5454 } 5455 } 5456 5457 /** 5458 * @brief map link keys to authenticated 5459 */ 5460 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5461 switch (link_key_type){ 5462 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5463 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5464 return 1; 5465 default: 5466 return 0; 5467 } 5468 } 5469 5470 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5471 log_info("gap_mitm_protection_required_for_security_level %u", level); 5472 return level > LEVEL_2; 5473 } 5474 5475 /** 5476 * @brief get current security level 5477 */ 5478 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5479 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5480 if (!connection) return LEVEL_0; 5481 return gap_security_level_for_connection(connection); 5482 } 5483 5484 /** 5485 * @brief request connection to device to 5486 * @result GAP_AUTHENTICATION_RESULT 5487 */ 5488 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5489 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5490 if (!connection){ 5491 hci_emit_security_level(con_handle, LEVEL_0); 5492 return; 5493 } 5494 5495 btstack_assert(hci_is_le_connection(connection) == false); 5496 5497 gap_security_level_t current_level = gap_security_level(con_handle); 5498 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5499 requested_level, connection->requested_security_level, current_level); 5500 5501 // authentication active if authentication request was sent or planned level > 0 5502 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5503 if (authentication_active){ 5504 // authentication already active 5505 if (connection->requested_security_level < requested_level){ 5506 // increase requested level as new level is higher 5507 // TODO: handle re-authentication when done 5508 connection->requested_security_level = requested_level; 5509 } 5510 } else { 5511 // no request active, notify if security sufficient 5512 if (requested_level <= current_level){ 5513 hci_emit_security_level(con_handle, current_level); 5514 return; 5515 } 5516 5517 // store request 5518 connection->requested_security_level = requested_level; 5519 5520 // start to authenticate connection 5521 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5522 hci_run(); 5523 } 5524 } 5525 5526 /** 5527 * @brief start dedicated bonding with device. disconnect after bonding 5528 * @param device 5529 * @param request MITM protection 5530 * @result GAP_DEDICATED_BONDING_COMPLETE 5531 */ 5532 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5533 5534 // create connection state machine 5535 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5536 5537 if (!connection){ 5538 return BTSTACK_MEMORY_ALLOC_FAILED; 5539 } 5540 5541 // delete linkn key 5542 gap_drop_link_key_for_bd_addr(device); 5543 5544 // configure LEVEL_2/3, dedicated bonding 5545 connection->state = SEND_CREATE_CONNECTION; 5546 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5547 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5548 connection->bonding_flags = BONDING_DEDICATED; 5549 5550 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5551 5552 // handle: connnection failure (connection complete != ok) 5553 // handle: authentication failure 5554 // handle: disconnect on done 5555 5556 hci_run(); 5557 5558 return 0; 5559 } 5560 #endif 5561 5562 void gap_set_local_name(const char * local_name){ 5563 hci_stack->local_name = local_name; 5564 } 5565 5566 5567 #ifdef ENABLE_BLE 5568 5569 #ifdef ENABLE_LE_CENTRAL 5570 void gap_start_scan(void){ 5571 hci_stack->le_scanning_enabled = true; 5572 hci_run(); 5573 } 5574 5575 void gap_stop_scan(void){ 5576 hci_stack->le_scanning_enabled = false; 5577 hci_run(); 5578 } 5579 5580 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5581 hci_stack->le_scan_type = scan_type; 5582 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5583 hci_stack->le_scan_interval = scan_interval; 5584 hci_stack->le_scan_window = scan_window; 5585 hci_stack->le_scanning_param_update = true; 5586 hci_run(); 5587 } 5588 5589 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5590 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5591 } 5592 5593 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5594 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5595 if (!conn){ 5596 // disallow if le connection is already outgoing 5597 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5598 log_error("le connection already active"); 5599 return ERROR_CODE_COMMAND_DISALLOWED; 5600 } 5601 5602 log_info("gap_connect: no connection exists yet, creating context"); 5603 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5604 if (!conn){ 5605 // notify client that alloc failed 5606 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5607 log_info("gap_connect: failed to alloc hci_connection_t"); 5608 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5609 } 5610 5611 // set le connecting state 5612 if (hci_is_le_connection_type(addr_type)){ 5613 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5614 } 5615 5616 conn->state = SEND_CREATE_CONNECTION; 5617 log_info("gap_connect: send create connection next"); 5618 hci_run(); 5619 return ERROR_CODE_SUCCESS; 5620 } 5621 5622 if (!hci_is_le_connection(conn) || 5623 (conn->state == SEND_CREATE_CONNECTION) || 5624 (conn->state == SENT_CREATE_CONNECTION)) { 5625 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5626 log_error("gap_connect: classic connection or connect is already being created"); 5627 return GATT_CLIENT_IN_WRONG_STATE; 5628 } 5629 5630 // check if connection was just disconnected 5631 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5632 log_info("gap_connect: send create connection (again)"); 5633 conn->state = SEND_CREATE_CONNECTION; 5634 hci_run(); 5635 return ERROR_CODE_SUCCESS; 5636 } 5637 5638 log_info("gap_connect: context exists with state %u", conn->state); 5639 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5640 hci_run(); 5641 return ERROR_CODE_SUCCESS; 5642 } 5643 5644 // @assumption: only a single outgoing LE Connection exists 5645 static hci_connection_t * gap_get_outgoing_connection(void){ 5646 btstack_linked_item_t *it; 5647 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5648 hci_connection_t * conn = (hci_connection_t *) it; 5649 if (!hci_is_le_connection(conn)) continue; 5650 switch (conn->state){ 5651 case SEND_CREATE_CONNECTION: 5652 case SENT_CREATE_CONNECTION: 5653 case SENT_CANCEL_CONNECTION: 5654 return conn; 5655 default: 5656 break; 5657 }; 5658 } 5659 return NULL; 5660 } 5661 5662 uint8_t gap_connect_cancel(void){ 5663 hci_connection_t * conn = gap_get_outgoing_connection(); 5664 if (!conn) return 0; 5665 switch (conn->state){ 5666 case SEND_CREATE_CONNECTION: 5667 // skip sending create connection and emit event instead 5668 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5669 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5670 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5671 btstack_memory_hci_connection_free( conn ); 5672 break; 5673 case SENT_CREATE_CONNECTION: 5674 // request to send cancel connection 5675 conn->state = SEND_CANCEL_CONNECTION; 5676 hci_run(); 5677 break; 5678 default: 5679 break; 5680 } 5681 return 0; 5682 } 5683 #endif 5684 5685 #ifdef ENABLE_LE_CENTRAL 5686 /** 5687 * @brief Set connection parameters for outgoing connections 5688 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5689 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5690 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5691 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5692 * @param conn_latency, default: 4 5693 * @param supervision_timeout (unit: 10ms), default: 720 ms 5694 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5695 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5696 */ 5697 5698 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5699 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5700 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5701 hci_stack->le_connection_scan_interval = conn_scan_interval; 5702 hci_stack->le_connection_scan_window = conn_scan_window; 5703 hci_stack->le_connection_interval_min = conn_interval_min; 5704 hci_stack->le_connection_interval_max = conn_interval_max; 5705 hci_stack->le_connection_latency = conn_latency; 5706 hci_stack->le_supervision_timeout = supervision_timeout; 5707 hci_stack->le_minimum_ce_length = min_ce_length; 5708 hci_stack->le_maximum_ce_length = max_ce_length; 5709 } 5710 #endif 5711 5712 /** 5713 * @brief Updates the connection parameters for a given LE connection 5714 * @param handle 5715 * @param conn_interval_min (unit: 1.25ms) 5716 * @param conn_interval_max (unit: 1.25ms) 5717 * @param conn_latency 5718 * @param supervision_timeout (unit: 10ms) 5719 * @returns 0 if ok 5720 */ 5721 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5722 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5723 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5724 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5725 connection->le_conn_interval_min = conn_interval_min; 5726 connection->le_conn_interval_max = conn_interval_max; 5727 connection->le_conn_latency = conn_latency; 5728 connection->le_supervision_timeout = supervision_timeout; 5729 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5730 hci_run(); 5731 return 0; 5732 } 5733 5734 /** 5735 * @brief Request an update of the connection parameter for a given LE connection 5736 * @param handle 5737 * @param conn_interval_min (unit: 1.25ms) 5738 * @param conn_interval_max (unit: 1.25ms) 5739 * @param conn_latency 5740 * @param supervision_timeout (unit: 10ms) 5741 * @returns 0 if ok 5742 */ 5743 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5744 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5745 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5746 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5747 connection->le_conn_interval_min = conn_interval_min; 5748 connection->le_conn_interval_max = conn_interval_max; 5749 connection->le_conn_latency = conn_latency; 5750 connection->le_supervision_timeout = supervision_timeout; 5751 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5752 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5753 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5754 return 0; 5755 } 5756 5757 #ifdef ENABLE_LE_PERIPHERAL 5758 5759 /** 5760 * @brief Set Advertisement Data 5761 * @param advertising_data_length 5762 * @param advertising_data (max 31 octets) 5763 * @note data is not copied, pointer has to stay valid 5764 */ 5765 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5766 hci_stack->le_advertisements_data_len = advertising_data_length; 5767 hci_stack->le_advertisements_data = advertising_data; 5768 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5769 hci_run(); 5770 } 5771 5772 /** 5773 * @brief Set Scan Response Data 5774 * @param advertising_data_length 5775 * @param advertising_data (max 31 octets) 5776 * @note data is not copied, pointer has to stay valid 5777 */ 5778 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5779 hci_stack->le_scan_response_data_len = scan_response_data_length; 5780 hci_stack->le_scan_response_data = scan_response_data; 5781 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5782 hci_run(); 5783 } 5784 5785 /** 5786 * @brief Set Advertisement Parameters 5787 * @param adv_int_min 5788 * @param adv_int_max 5789 * @param adv_type 5790 * @param direct_address_type 5791 * @param direct_address 5792 * @param channel_map 5793 * @param filter_policy 5794 * 5795 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5796 */ 5797 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5798 uint8_t direct_address_typ, bd_addr_t direct_address, 5799 uint8_t channel_map, uint8_t filter_policy) { 5800 5801 hci_stack->le_advertisements_interval_min = adv_int_min; 5802 hci_stack->le_advertisements_interval_max = adv_int_max; 5803 hci_stack->le_advertisements_type = adv_type; 5804 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5805 hci_stack->le_advertisements_channel_map = channel_map; 5806 hci_stack->le_advertisements_filter_policy = filter_policy; 5807 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5808 6); 5809 5810 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 5811 hci_run(); 5812 } 5813 5814 /** 5815 * @brief Enable/Disable Advertisements 5816 * @param enabled 5817 */ 5818 void gap_advertisements_enable(int enabled){ 5819 hci_stack->le_advertisements_enabled = enabled != 0; 5820 hci_update_advertisements_enabled_for_current_roles(); 5821 hci_run(); 5822 } 5823 5824 #endif 5825 5826 void hci_le_set_own_address_type(uint8_t own_address_type){ 5827 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5828 if (own_address_type == hci_stack->le_own_addr_type) return; 5829 hci_stack->le_own_addr_type = own_address_type; 5830 5831 #ifdef ENABLE_LE_PERIPHERAL 5832 // update advertisement parameters, too 5833 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5834 hci_run(); 5835 #endif 5836 #ifdef ENABLE_LE_CENTRAL 5837 // note: we don't update scan parameters or modify ongoing connection attempts 5838 #endif 5839 } 5840 5841 #endif 5842 5843 uint8_t gap_disconnect(hci_con_handle_t handle){ 5844 hci_connection_t * conn = hci_connection_for_handle(handle); 5845 if (!conn){ 5846 hci_emit_disconnection_complete(handle, 0); 5847 return 0; 5848 } 5849 // ignore if already disconnected 5850 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5851 return 0; 5852 } 5853 conn->state = SEND_DISCONNECT; 5854 hci_run(); 5855 return 0; 5856 } 5857 5858 int gap_read_rssi(hci_con_handle_t con_handle){ 5859 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5860 if (hci_connection == NULL) return 0; 5861 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5862 hci_run(); 5863 return 1; 5864 } 5865 5866 /** 5867 * @brief Get connection type 5868 * @param con_handle 5869 * @result connection_type 5870 */ 5871 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5872 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5873 if (!conn) return GAP_CONNECTION_INVALID; 5874 switch (conn->address_type){ 5875 case BD_ADDR_TYPE_LE_PUBLIC: 5876 case BD_ADDR_TYPE_LE_RANDOM: 5877 return GAP_CONNECTION_LE; 5878 case BD_ADDR_TYPE_SCO: 5879 return GAP_CONNECTION_SCO; 5880 case BD_ADDR_TYPE_ACL: 5881 return GAP_CONNECTION_ACL; 5882 default: 5883 return GAP_CONNECTION_INVALID; 5884 } 5885 } 5886 5887 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5888 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5889 if (!conn) return HCI_ROLE_INVALID; 5890 return (hci_role_t) conn->role; 5891 } 5892 5893 5894 #ifdef ENABLE_CLASSIC 5895 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5896 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5897 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5898 conn->request_role = role; 5899 hci_run(); 5900 return ERROR_CODE_SUCCESS; 5901 } 5902 #endif 5903 5904 #ifdef ENABLE_BLE 5905 5906 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){ 5907 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5908 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5909 5910 conn->le_phy_update_all_phys = all_phys; 5911 conn->le_phy_update_tx_phys = tx_phys; 5912 conn->le_phy_update_rx_phys = rx_phys; 5913 conn->le_phy_update_phy_options = phy_options; 5914 5915 hci_run(); 5916 5917 return 0; 5918 } 5919 5920 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5921 // check if already in list 5922 btstack_linked_list_iterator_t it; 5923 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5924 while (btstack_linked_list_iterator_has_next(&it)) { 5925 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5926 if (entry->address_type != address_type) { 5927 continue; 5928 } 5929 if (memcmp(entry->address, address, 6) != 0) { 5930 continue; 5931 } 5932 // disallow if already scheduled to add 5933 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5934 return ERROR_CODE_COMMAND_DISALLOWED; 5935 } 5936 // still on controller, but scheduled to remove -> re-add 5937 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5938 return ERROR_CODE_SUCCESS; 5939 } 5940 // alloc and add to list 5941 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5942 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5943 entry->address_type = address_type; 5944 (void)memcpy(entry->address, address, 6); 5945 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5946 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5947 return ERROR_CODE_SUCCESS; 5948 } 5949 5950 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5951 btstack_linked_list_iterator_t it; 5952 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5953 while (btstack_linked_list_iterator_has_next(&it)){ 5954 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5955 if (entry->address_type != address_type) { 5956 continue; 5957 } 5958 if (memcmp(entry->address, address, 6) != 0) { 5959 continue; 5960 } 5961 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5962 // remove from controller if already present 5963 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5964 } else { 5965 // directly remove entry from whitelist 5966 btstack_linked_list_iterator_remove(&it); 5967 btstack_memory_whitelist_entry_free(entry); 5968 } 5969 return ERROR_CODE_SUCCESS; 5970 } 5971 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5972 } 5973 5974 static void hci_whitelist_clear(void){ 5975 btstack_linked_list_iterator_t it; 5976 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5977 while (btstack_linked_list_iterator_has_next(&it)){ 5978 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5979 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5980 // remove from controller if already present 5981 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5982 continue; 5983 } 5984 // directly remove entry from whitelist 5985 btstack_linked_list_iterator_remove(&it); 5986 btstack_memory_whitelist_entry_free(entry); 5987 } 5988 } 5989 5990 /** 5991 * @brief Clear Whitelist 5992 * @returns 0 if ok 5993 */ 5994 uint8_t gap_whitelist_clear(void){ 5995 hci_whitelist_clear(); 5996 hci_run(); 5997 return ERROR_CODE_SUCCESS; 5998 } 5999 6000 /** 6001 * @brief Add Device to Whitelist 6002 * @param address_typ 6003 * @param address 6004 * @returns 0 if ok 6005 */ 6006 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6007 uint8_t status = hci_whitelist_add(address_type, address); 6008 if (status){ 6009 return status; 6010 } 6011 hci_run(); 6012 return ERROR_CODE_SUCCESS; 6013 } 6014 6015 /** 6016 * @brief Remove Device from Whitelist 6017 * @param address_typ 6018 * @param address 6019 * @returns 0 if ok 6020 */ 6021 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6022 uint8_t status = hci_whitelist_remove(address_type, address); 6023 if (status){ 6024 return status; 6025 } 6026 hci_run(); 6027 return ERROR_CODE_SUCCESS; 6028 } 6029 6030 #ifdef ENABLE_LE_CENTRAL 6031 /** 6032 * @brief Connect with Whitelist 6033 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6034 * @returns - if ok 6035 */ 6036 uint8_t gap_connect_with_whitelist(void){ 6037 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6038 return ERROR_CODE_COMMAND_DISALLOWED; 6039 } 6040 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6041 hci_run(); 6042 return ERROR_CODE_SUCCESS; 6043 } 6044 6045 /** 6046 * @brief Auto Connection Establishment - Start Connecting to device 6047 * @param address_typ 6048 * @param address 6049 * @returns 0 if ok 6050 */ 6051 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6052 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6053 return ERROR_CODE_COMMAND_DISALLOWED; 6054 } 6055 6056 uint8_t status = hci_whitelist_add(address_type, address); 6057 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6058 return status; 6059 } 6060 6061 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6062 6063 hci_run(); 6064 return ERROR_CODE_SUCCESS; 6065 } 6066 6067 /** 6068 * @brief Auto Connection Establishment - Stop Connecting to device 6069 * @param address_typ 6070 * @param address 6071 * @returns 0 if ok 6072 */ 6073 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6074 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6075 return ERROR_CODE_COMMAND_DISALLOWED; 6076 } 6077 6078 hci_whitelist_remove(address_type, address); 6079 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6080 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6081 } 6082 hci_run(); 6083 return 0; 6084 } 6085 6086 /** 6087 * @brief Auto Connection Establishment - Stop everything 6088 * @note Convenience function to stop all active auto connection attempts 6089 */ 6090 uint8_t gap_auto_connection_stop_all(void){ 6091 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6092 return ERROR_CODE_COMMAND_DISALLOWED; 6093 } 6094 hci_whitelist_clear(); 6095 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6096 hci_run(); 6097 return ERROR_CODE_SUCCESS; 6098 } 6099 6100 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6101 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6102 if (!conn) return 0; 6103 return conn->le_connection_interval; 6104 } 6105 #endif 6106 #endif 6107 6108 #ifdef ENABLE_CLASSIC 6109 /** 6110 * @brief Set Extended Inquiry Response data 6111 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6112 * @note has to be done before stack starts up 6113 */ 6114 void gap_set_extended_inquiry_response(const uint8_t * data){ 6115 hci_stack->eir_data = data; 6116 } 6117 6118 /** 6119 * @brief Start GAP Classic Inquiry 6120 * @param duration in 1.28s units 6121 * @return 0 if ok 6122 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6123 */ 6124 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6125 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6126 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6127 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6128 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6129 } 6130 hci_stack->inquiry_state = duration_in_1280ms_units; 6131 hci_run(); 6132 return 0; 6133 } 6134 6135 /** 6136 * @brief Stop GAP Classic Inquiry 6137 * @returns 0 if ok 6138 */ 6139 int gap_inquiry_stop(void){ 6140 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6141 // emit inquiry complete event, before it even started 6142 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6143 hci_emit_event(event, sizeof(event), 1); 6144 return 0; 6145 } 6146 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6147 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6148 hci_run(); 6149 return 0; 6150 } 6151 6152 void gap_inquiry_set_lap(uint32_t lap){ 6153 hci_stack->inquiry_lap = lap; 6154 } 6155 6156 6157 /** 6158 * @brief Remote Name Request 6159 * @param addr 6160 * @param page_scan_repetition_mode 6161 * @param clock_offset only used when bit 15 is set 6162 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6163 */ 6164 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6165 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6166 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6167 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6168 hci_stack->remote_name_clock_offset = clock_offset; 6169 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6170 hci_run(); 6171 return 0; 6172 } 6173 6174 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6175 hci_stack->gap_pairing_state = state; 6176 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6177 hci_run(); 6178 return 0; 6179 } 6180 6181 /** 6182 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6183 * @param addr 6184 * @param pin_data 6185 * @param pin_len 6186 * @return 0 if ok 6187 */ 6188 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6189 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6190 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6191 hci_stack->gap_pairing_pin_len = pin_len; 6192 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6193 } 6194 6195 /** 6196 * @brief Legacy Pairing Pin Code Response 6197 * @param addr 6198 * @param pin 6199 * @return 0 if ok 6200 */ 6201 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6202 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6203 } 6204 6205 /** 6206 * @brief Abort Legacy Pairing 6207 * @param addr 6208 * @param pin 6209 * @return 0 if ok 6210 */ 6211 int gap_pin_code_negative(bd_addr_t addr){ 6212 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6213 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6214 } 6215 6216 /** 6217 * @brief SSP Passkey Response 6218 * @param addr 6219 * @param passkey 6220 * @return 0 if ok 6221 */ 6222 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6223 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6224 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6225 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6226 } 6227 6228 /** 6229 * @brief Abort SSP Passkey Entry/Pairing 6230 * @param addr 6231 * @param pin 6232 * @return 0 if ok 6233 */ 6234 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6235 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6236 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6237 } 6238 6239 /** 6240 * @brief Accept SSP Numeric Comparison 6241 * @param addr 6242 * @param passkey 6243 * @return 0 if ok 6244 */ 6245 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6246 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6247 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6248 } 6249 6250 /** 6251 * @brief Abort SSP Numeric Comparison/Pairing 6252 * @param addr 6253 * @param pin 6254 * @return 0 if ok 6255 */ 6256 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6257 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6258 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6259 } 6260 6261 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6262 6263 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6264 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6265 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6266 connectionSetAuthenticationFlags(conn, flag); 6267 hci_run(); 6268 return ERROR_CODE_SUCCESS; 6269 } 6270 6271 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6272 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_REPLY); 6273 } 6274 6275 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6276 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6277 } 6278 #endif 6279 6280 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6281 /** 6282 * @brief Report Remote OOB Data 6283 * @param bd_addr 6284 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6285 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6286 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6287 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6288 */ 6289 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){ 6290 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6291 if (connection == NULL) { 6292 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6293 } 6294 connection->classic_oob_c_192 = c_192; 6295 connection->classic_oob_r_192 = r_192; 6296 connection->classic_oob_c_256 = c_256; 6297 connection->classic_oob_r_256 = r_256; 6298 return ERROR_CODE_SUCCESS; 6299 } 6300 /** 6301 * @brief Generate new OOB data 6302 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6303 */ 6304 void gap_ssp_generate_oob_data(void){ 6305 hci_stack->classic_read_local_oob_data = true; 6306 hci_run(); 6307 } 6308 6309 #endif 6310 6311 /** 6312 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6313 * @param inquiry_mode see bluetooth_defines.h 6314 */ 6315 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6316 hci_stack->inquiry_mode = inquiry_mode; 6317 } 6318 6319 /** 6320 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6321 */ 6322 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6323 hci_stack->sco_voice_setting = voice_setting; 6324 } 6325 6326 /** 6327 * @brief Get SCO Voice Setting 6328 * @return current voice setting 6329 */ 6330 uint16_t hci_get_sco_voice_setting(void){ 6331 return hci_stack->sco_voice_setting; 6332 } 6333 6334 static int hci_have_usb_transport(void){ 6335 if (!hci_stack->hci_transport) return 0; 6336 const char * transport_name = hci_stack->hci_transport->name; 6337 if (!transport_name) return 0; 6338 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6339 } 6340 6341 /** @brief Get SCO packet length for current SCO Voice setting 6342 * @note Using SCO packets of the exact length is required for USB transfer 6343 * @return Length of SCO packets in bytes (not audio frames) 6344 */ 6345 int hci_get_sco_packet_length(void){ 6346 int sco_packet_length = 0; 6347 6348 #ifdef ENABLE_SCO_OVER_HCI 6349 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6350 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6351 6352 if (hci_have_usb_transport()){ 6353 // see Core Spec for H2 USB Transfer. 6354 // 3 byte SCO header + 24 bytes per connection 6355 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6356 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6357 } else { 6358 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6359 sco_packet_length = 3 + 60 * multiplier; 6360 // assert that it still fits inside an SCO buffer 6361 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6362 sco_packet_length = 3 + 60; 6363 } 6364 } 6365 #endif 6366 6367 #ifdef HAVE_SCO_TRANSPORT 6368 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6369 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6370 sco_packet_length = 3 + 60 * multiplier; 6371 #endif 6372 return sco_packet_length; 6373 } 6374 6375 /** 6376 * @brief Sets the master/slave policy 6377 * @param policy (0: attempt to become master, 1: let connecting device decide) 6378 */ 6379 void hci_set_master_slave_policy(uint8_t policy){ 6380 hci_stack->master_slave_policy = policy; 6381 } 6382 6383 #endif 6384 6385 HCI_STATE hci_get_state(void){ 6386 return hci_stack->state; 6387 } 6388 6389 #ifdef ENABLE_CLASSIC 6390 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6391 hci_stack->gap_classic_accept_callback = accept_callback; 6392 } 6393 #endif 6394 6395 /** 6396 * @brief Set callback for Bluetooth Hardware Error 6397 */ 6398 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6399 hci_stack->hardware_error_callback = fn; 6400 } 6401 6402 void hci_disconnect_all(void){ 6403 btstack_linked_list_iterator_t it; 6404 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6405 while (btstack_linked_list_iterator_has_next(&it)){ 6406 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6407 if (con->state == SENT_DISCONNECT) continue; 6408 con->state = SEND_DISCONNECT; 6409 } 6410 hci_run(); 6411 } 6412 6413 uint16_t hci_get_manufacturer(void){ 6414 return hci_stack->manufacturer; 6415 } 6416 6417 #ifdef ENABLE_BLE 6418 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6419 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6420 if (!hci_con) return NULL; 6421 return &hci_con->sm_connection; 6422 } 6423 6424 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6425 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6426 #endif 6427 6428 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6429 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6430 if (hci_connection == NULL) return 0; 6431 if (hci_is_le_connection(hci_connection)){ 6432 #ifdef ENABLE_BLE 6433 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6434 if (sm_conn->sm_connection_encrypted) { 6435 return sm_conn->sm_actual_encryption_key_size; 6436 } 6437 #endif 6438 } else { 6439 #ifdef ENABLE_CLASSIC 6440 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 6441 return hci_connection->encryption_key_size; 6442 } 6443 #endif 6444 } 6445 return 0; 6446 } 6447 6448 int gap_authenticated(hci_con_handle_t con_handle){ 6449 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6450 if (hci_connection == NULL) return 0; 6451 6452 switch (hci_connection->address_type){ 6453 #ifdef ENABLE_BLE 6454 case BD_ADDR_TYPE_LE_PUBLIC: 6455 case BD_ADDR_TYPE_LE_RANDOM: 6456 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6457 return hci_connection->sm_connection.sm_connection_authenticated; 6458 #endif 6459 #ifdef ENABLE_CLASSIC 6460 case BD_ADDR_TYPE_SCO: 6461 case BD_ADDR_TYPE_ACL: 6462 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6463 #endif 6464 default: 6465 return 0; 6466 } 6467 } 6468 6469 int gap_secure_connection(hci_con_handle_t con_handle){ 6470 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6471 if (hci_connection == NULL) return 0; 6472 6473 switch (hci_connection->address_type){ 6474 #ifdef ENABLE_BLE 6475 case BD_ADDR_TYPE_LE_PUBLIC: 6476 case BD_ADDR_TYPE_LE_RANDOM: 6477 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6478 return hci_connection->sm_connection.sm_connection_sc; 6479 #endif 6480 #ifdef ENABLE_CLASSIC 6481 case BD_ADDR_TYPE_SCO: 6482 case BD_ADDR_TYPE_ACL: 6483 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6484 #endif 6485 default: 6486 return 0; 6487 } 6488 } 6489 6490 bool gap_bonded(hci_con_handle_t con_handle){ 6491 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6492 if (hci_connection == NULL) return 0; 6493 6494 #ifdef ENABLE_CLASSIC 6495 link_key_t link_key; 6496 link_key_type_t link_key_type; 6497 #endif 6498 switch (hci_connection->address_type){ 6499 #ifdef ENABLE_BLE 6500 case BD_ADDR_TYPE_LE_PUBLIC: 6501 case BD_ADDR_TYPE_LE_RANDOM: 6502 return hci_connection->sm_connection.sm_le_db_index >= 0; 6503 #endif 6504 #ifdef ENABLE_CLASSIC 6505 case BD_ADDR_TYPE_SCO: 6506 case BD_ADDR_TYPE_ACL: 6507 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6508 #endif 6509 default: 6510 return false; 6511 } 6512 } 6513 6514 #ifdef ENABLE_BLE 6515 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6516 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6517 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6518 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6519 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6520 return sm_conn->sm_connection_authorization_state; 6521 } 6522 #endif 6523 6524 #ifdef ENABLE_CLASSIC 6525 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){ 6526 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6527 if (!conn) return GAP_CONNECTION_INVALID; 6528 conn->sniff_min_interval = sniff_min_interval; 6529 conn->sniff_max_interval = sniff_max_interval; 6530 conn->sniff_attempt = sniff_attempt; 6531 conn->sniff_timeout = sniff_timeout; 6532 hci_run(); 6533 return 0; 6534 } 6535 6536 /** 6537 * @brief Exit Sniff mode 6538 * @param con_handle 6539 @ @return 0 if ok 6540 */ 6541 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6542 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6543 if (!conn) return GAP_CONNECTION_INVALID; 6544 conn->sniff_min_interval = 0xffff; 6545 hci_run(); 6546 return 0; 6547 } 6548 6549 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){ 6550 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6551 if (!conn) return GAP_CONNECTION_INVALID; 6552 conn->sniff_subrating_max_latency = max_latency; 6553 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6554 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6555 hci_run(); 6556 return ERROR_CODE_SUCCESS; 6557 } 6558 6559 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){ 6560 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6561 if (!conn) return GAP_CONNECTION_INVALID; 6562 conn->qos_service_type = service_type; 6563 conn->qos_token_rate = token_rate; 6564 conn->qos_peak_bandwidth = peak_bandwidth; 6565 conn->qos_latency = latency; 6566 conn->qos_delay_variation = delay_variation; 6567 hci_run(); 6568 return ERROR_CODE_SUCCESS; 6569 } 6570 6571 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6572 hci_stack->new_page_scan_interval = page_scan_interval; 6573 hci_stack->new_page_scan_window = page_scan_window; 6574 hci_run(); 6575 } 6576 6577 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6578 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6579 hci_run(); 6580 } 6581 6582 #endif 6583 6584 void hci_halting_defer(void){ 6585 if (hci_stack->state != HCI_STATE_HALTING) return; 6586 switch (hci_stack->substate){ 6587 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6588 case HCI_HALTING_CLOSE: 6589 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6590 break; 6591 default: 6592 break; 6593 } 6594 } 6595 6596 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6597 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6598 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6599 if (le_device_db_index >= le_device_db_max_count()) return; 6600 uint8_t offset = le_device_db_index >> 3; 6601 uint8_t mask = 1 << (le_device_db_index & 7); 6602 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6603 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6604 // note: go back to remove entries, otherwise, a remove + add will skip the add 6605 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6606 } 6607 } 6608 6609 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6610 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6611 if (le_device_db_index >= le_device_db_max_count()) return; 6612 uint8_t offset = le_device_db_index >> 3; 6613 uint8_t mask = 1 << (le_device_db_index & 7); 6614 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6615 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6616 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6617 } 6618 } 6619 6620 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6621 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6622 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6623 } 6624 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6625 // restart le resolving list update 6626 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6627 } 6628 return ERROR_CODE_SUCCESS; 6629 } 6630 #endif 6631 6632 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6633 void hci_setup_test_connections_fuzz(void){ 6634 hci_connection_t * conn; 6635 6636 // default address: 66:55:44:33:00:01 6637 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6638 6639 // setup Controller info 6640 hci_stack->num_cmd_packets = 255; 6641 hci_stack->acl_packets_total_num = 255; 6642 6643 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6644 addr[5] = 0x01; 6645 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6646 conn->con_handle = addr[5]; 6647 conn->role = HCI_ROLE_SLAVE; 6648 conn->state = RECEIVED_CONNECTION_REQUEST; 6649 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6650 6651 // setup incoming Classic SCO connection with con handle 0x0002 6652 addr[5] = 0x02; 6653 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6654 conn->con_handle = addr[5]; 6655 conn->role = HCI_ROLE_SLAVE; 6656 conn->state = RECEIVED_CONNECTION_REQUEST; 6657 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6658 6659 // setup ready Classic ACL connection with con handle 0x0003 6660 addr[5] = 0x03; 6661 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6662 conn->con_handle = addr[5]; 6663 conn->role = HCI_ROLE_SLAVE; 6664 conn->state = OPEN; 6665 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6666 6667 // setup ready Classic SCO connection with con handle 0x0004 6668 addr[5] = 0x04; 6669 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6670 conn->con_handle = addr[5]; 6671 conn->role = HCI_ROLE_SLAVE; 6672 conn->state = OPEN; 6673 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6674 6675 // setup ready LE ACL connection with con handle 0x005 and public address 6676 addr[5] = 0x05; 6677 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6678 conn->con_handle = addr[5]; 6679 conn->role = HCI_ROLE_SLAVE; 6680 conn->state = OPEN; 6681 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6682 conn->sm_connection.sm_connection_encrypted = 1; 6683 } 6684 6685 void hci_free_connections_fuzz(void){ 6686 btstack_linked_list_iterator_t it; 6687 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6688 while (btstack_linked_list_iterator_has_next(&it)){ 6689 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6690 btstack_linked_list_iterator_remove(&it); 6691 btstack_memory_hci_connection_free(con); 6692 } 6693 } 6694 void hci_simulate_working_fuzz(void){ 6695 hci_init_done(); 6696 hci_stack->num_cmd_packets = 255; 6697 } 6698 #endif 6699