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_FLAG_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 & AUTH_FLAG_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 |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 402 } else { 403 hci_connection->authentication_flags |= AUTH_FLAG_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 &= ~AUTH_FLAG_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 |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2095 conn->encryption_key_size = encryption_key_size; 2096 2097 if ((conn->authentication_flags & AUTH_FLAG_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, AUTH_FLAG_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 // request handled by hci_run() 2697 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 2698 break; 2699 2700 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2701 hci_event_link_key_request_get_bd_addr(packet, addr); 2702 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2703 if (!conn) break; 2704 2705 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2706 2707 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2708 // Change Connection Encryption keeps link key type 2709 if (link_key_type != CHANGED_COMBINATION_KEY){ 2710 conn->link_key_type = link_key_type; 2711 } 2712 // cache link key. link keys stored in little-endian format for legacy reasons 2713 memcpy(&conn->link_key, &packet[8], 16); 2714 2715 // only store link key: 2716 // - if bondable enabled 2717 if (hci_stack->bondable == false) break; 2718 // - if security level sufficient 2719 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2720 // - for SSP, also check if remote side requested bonding as well 2721 if (conn->link_key_type != COMBINATION_KEY){ 2722 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2723 if (!remote_bonding){ 2724 break; 2725 } 2726 } 2727 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2728 break; 2729 } 2730 2731 case HCI_EVENT_PIN_CODE_REQUEST: 2732 hci_event_pin_code_request_get_bd_addr(packet, addr); 2733 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2734 if (!conn) break; 2735 2736 hci_pairing_started(conn, false); 2737 // abort pairing if: non-bondable mode (event is not forwarded to app) 2738 if (!hci_stack->bondable ){ 2739 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2740 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2741 hci_run(); 2742 return; 2743 } 2744 // abort pairing if: Secure Connections Only mode (event is not forwarded to app) 2745 if (hci_stack->gap_secure_connections_only_mode){ 2746 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2747 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2748 hci_run(); 2749 return; 2750 } 2751 break; 2752 2753 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2754 hci_event_io_capability_response_get_bd_addr(packet, addr); 2755 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2756 if (!conn) break; 2757 2758 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2759 hci_pairing_started(conn, true); 2760 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2761 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2762 break; 2763 2764 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2765 hci_event_io_capability_response_get_bd_addr(packet, addr); 2766 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2767 if (!conn) break; 2768 2769 hci_pairing_started(conn, true); 2770 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2771 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2772 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2773 } else { 2774 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2775 } 2776 #endif 2777 break; 2778 2779 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2780 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2781 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2782 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_REMOTE_OOB_DATA_REPLY); 2783 break; 2784 #endif 2785 2786 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2787 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2788 if (hci_ssp_validate_possible_security_level(addr) == false) break; 2789 if (!hci_stack->ssp_auto_accept) break; 2790 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2791 break; 2792 2793 case HCI_EVENT_USER_PASSKEY_REQUEST: 2794 hci_event_user_passkey_request_get_bd_addr(packet, addr); 2795 if (hci_ssp_validate_possible_security_level(addr) == false) break; 2796 if (!hci_stack->ssp_auto_accept) break; 2797 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2798 break; 2799 2800 case HCI_EVENT_MODE_CHANGE: 2801 handle = hci_event_mode_change_get_handle(packet); 2802 conn = hci_connection_for_handle(handle); 2803 if (!conn) break; 2804 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2805 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2806 break; 2807 #endif 2808 2809 case HCI_EVENT_ENCRYPTION_CHANGE: 2810 handle = hci_event_encryption_change_get_connection_handle(packet); 2811 conn = hci_connection_for_handle(handle); 2812 if (!conn) break; 2813 if (hci_event_encryption_change_get_status(packet) == 0u) { 2814 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2815 if (encryption_enabled){ 2816 if (hci_is_le_connection(conn)){ 2817 // For LE, we accept connection as encrypted 2818 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2819 } 2820 #ifdef ENABLE_CLASSIC 2821 else { 2822 2823 // dedicated bonding: send result and disconnect 2824 if (conn->bonding_flags & BONDING_DEDICATED){ 2825 conn->bonding_flags &= ~BONDING_DEDICATED; 2826 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2827 conn->bonding_status = packet[2]; 2828 break; 2829 } 2830 2831 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2832 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2833 bool connected_uses_aes_ccm = encryption_enabled == 2; 2834 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2835 log_info("SC during pairing, but only E0 now -> abort"); 2836 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2837 break; 2838 } 2839 2840 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2841 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2842 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2843 } else { 2844 // if not, pretend everything is perfect 2845 hci_handle_read_encryption_key_size_complete(conn, 16); 2846 } 2847 } 2848 #endif 2849 } else { 2850 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 2851 } 2852 } 2853 2854 break; 2855 2856 #ifdef ENABLE_CLASSIC 2857 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2858 handle = hci_event_authentication_complete_get_connection_handle(packet); 2859 conn = hci_connection_for_handle(handle); 2860 if (!conn) break; 2861 2862 // clear authentication active flag 2863 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 2864 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 2865 2866 // authenticated only if auth status == 0 2867 if (hci_event_authentication_complete_get_status(packet) == 0){ 2868 // authenticated 2869 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2870 2871 // If not already encrypted, start encryption 2872 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 2873 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2874 break; 2875 } 2876 } 2877 2878 // emit updated security level 2879 conn->requested_security_level = LEVEL_0; 2880 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2881 break; 2882 2883 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 2884 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 2885 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2886 if (!conn) break; 2887 2888 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 2889 break; 2890 #endif 2891 2892 // HCI_EVENT_DISCONNECTION_COMPLETE 2893 // has been split, to first notify stack before shutting connection down 2894 // see end of function, too. 2895 case HCI_EVENT_DISCONNECTION_COMPLETE: 2896 if (packet[2]) break; // status != 0 2897 handle = little_endian_read_16(packet, 3); 2898 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2899 if (hci_stack->acl_fragmentation_total_size > 0u) { 2900 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2901 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2902 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2903 hci_stack->acl_fragmentation_total_size = 0; 2904 hci_stack->acl_fragmentation_pos = 0; 2905 if (release_buffer){ 2906 hci_release_packet_buffer(); 2907 } 2908 } 2909 } 2910 2911 conn = hci_connection_for_handle(handle); 2912 if (!conn) break; 2913 #ifdef ENABLE_CLASSIC 2914 // pairing failed if it was ongoing 2915 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 2916 #endif 2917 // mark connection for shutdown 2918 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2919 2920 // emit dedicatd bonding event 2921 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2922 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2923 } 2924 2925 #ifdef ENABLE_BLE 2926 #ifdef ENABLE_LE_PERIPHERAL 2927 // re-enable advertisements for le connections if active 2928 if (hci_is_le_connection(conn)){ 2929 hci_update_advertisements_enabled_for_current_roles(); 2930 } 2931 #endif 2932 #endif 2933 break; 2934 2935 case HCI_EVENT_HARDWARE_ERROR: 2936 log_error("Hardware Error: 0x%02x", packet[2]); 2937 if (hci_stack->hardware_error_callback){ 2938 (*hci_stack->hardware_error_callback)(packet[2]); 2939 } else { 2940 // if no special requests, just reboot stack 2941 hci_power_control_off(); 2942 hci_power_control_on(); 2943 } 2944 break; 2945 2946 #ifdef ENABLE_CLASSIC 2947 case HCI_EVENT_ROLE_CHANGE: 2948 if (packet[2]) break; // status != 0 2949 reverse_bd_addr(&packet[3], addr); 2950 addr_type = BD_ADDR_TYPE_ACL; 2951 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2952 if (!conn) break; 2953 conn->role = packet[9]; 2954 break; 2955 #endif 2956 2957 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2958 // release packet buffer only for asynchronous transport and if there are not further fragements 2959 if (hci_transport_synchronous()) { 2960 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2961 return; // instead of break: to avoid re-entering hci_run() 2962 } 2963 hci_stack->acl_fragmentation_tx_active = 0; 2964 if (hci_stack->acl_fragmentation_total_size) break; 2965 hci_release_packet_buffer(); 2966 2967 // L2CAP receives this event via the hci_emit_event below 2968 2969 #ifdef ENABLE_CLASSIC 2970 // For SCO, we do the can_send_now_check here 2971 hci_notify_if_sco_can_send_now(); 2972 #endif 2973 break; 2974 2975 #ifdef ENABLE_CLASSIC 2976 case HCI_EVENT_SCO_CAN_SEND_NOW: 2977 // For SCO, we do the can_send_now_check here 2978 hci_stack->sco_can_send_now = 1; 2979 hci_notify_if_sco_can_send_now(); 2980 return; 2981 2982 // explode inquriy results for easier consumption 2983 case HCI_EVENT_INQUIRY_RESULT: 2984 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2985 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2986 gap_inquiry_explode(packet, size); 2987 break; 2988 #endif 2989 2990 #ifdef ENABLE_BLE 2991 case HCI_EVENT_LE_META: 2992 switch (packet[2]){ 2993 #ifdef ENABLE_LE_CENTRAL 2994 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2995 // log_info("advertising report received"); 2996 if (!hci_stack->le_scanning_enabled) break; 2997 le_handle_advertisement_report(packet, size); 2998 break; 2999 #endif 3000 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3001 event_handle_le_connection_complete(packet); 3002 break; 3003 3004 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3005 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3006 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3007 conn = hci_connection_for_handle(handle); 3008 if (!conn) break; 3009 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3010 break; 3011 3012 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3013 // connection 3014 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3015 conn = hci_connection_for_handle(handle); 3016 if (conn) { 3017 // read arguments 3018 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3019 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3020 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3021 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3022 3023 // validate against current connection parameter range 3024 le_connection_parameter_range_t existing_range; 3025 gap_get_connection_parameter_range(&existing_range); 3026 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3027 if (update_parameter){ 3028 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3029 conn->le_conn_interval_min = le_conn_interval_min; 3030 conn->le_conn_interval_max = le_conn_interval_max; 3031 conn->le_conn_latency = le_conn_latency; 3032 conn->le_supervision_timeout = le_supervision_timeout; 3033 } else { 3034 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3035 } 3036 } 3037 break; 3038 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3039 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3040 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3041 conn = hci_connection_for_handle(handle); 3042 if (conn) { 3043 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3044 } 3045 break; 3046 #endif 3047 default: 3048 break; 3049 } 3050 break; 3051 #endif 3052 case HCI_EVENT_VENDOR_SPECIFIC: 3053 // Vendor specific commands often create vendor specific event instead of num completed packets 3054 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3055 switch (hci_stack->manufacturer){ 3056 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3057 hci_stack->num_cmd_packets = 1; 3058 break; 3059 default: 3060 break; 3061 } 3062 break; 3063 default: 3064 break; 3065 } 3066 3067 handle_event_for_current_stack_state(packet, size); 3068 3069 // notify upper stack 3070 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3071 3072 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3073 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3074 handle = little_endian_read_16(packet, 3); 3075 hci_connection_t * aConn = hci_connection_for_handle(handle); 3076 // discard connection if app did not trigger a reconnect in the event handler 3077 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3078 hci_shutdown_connection(aConn); 3079 } 3080 } 3081 3082 // execute main loop 3083 hci_run(); 3084 } 3085 3086 #ifdef ENABLE_CLASSIC 3087 3088 #ifdef ENABLE_SCO_OVER_HCI 3089 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3090 static void sco_schedule_tx(hci_connection_t * conn); 3091 3092 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3093 log_debug("SCO TX Timeout"); 3094 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3095 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3096 if (!conn) return; 3097 3098 // trigger send 3099 conn->sco_tx_ready = 1; 3100 // extra packet if CVSD but SCO buffer is too short 3101 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3102 conn->sco_tx_ready++; 3103 } 3104 hci_notify_if_sco_can_send_now(); 3105 } 3106 3107 3108 #define SCO_TX_AFTER_RX_MS (6) 3109 3110 static void sco_schedule_tx(hci_connection_t * conn){ 3111 3112 uint32_t now = btstack_run_loop_get_time_ms(); 3113 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3114 int time_delta_ms = sco_tx_ms - now; 3115 3116 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3117 3118 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3119 btstack_run_loop_set_timer(timer, time_delta_ms); 3120 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3121 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3122 btstack_run_loop_add_timer(timer); 3123 } 3124 #endif 3125 3126 static void sco_handler(uint8_t * packet, uint16_t size){ 3127 // lookup connection struct 3128 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3129 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3130 if (!conn) return; 3131 3132 #ifdef ENABLE_SCO_OVER_HCI 3133 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3134 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3135 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3136 packet[2] = 0x3c; 3137 memmove(&packet[3], &packet[23], 63); 3138 size = 63; 3139 } 3140 } 3141 3142 if (hci_have_usb_transport()){ 3143 // Nothing to do 3144 } else { 3145 // 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); 3146 if (hci_stack->synchronous_flow_control_enabled == 0){ 3147 uint32_t now = btstack_run_loop_get_time_ms(); 3148 3149 if (!conn->sco_rx_valid){ 3150 // ignore first 10 packets 3151 conn->sco_rx_count++; 3152 // log_debug("sco rx count %u", conn->sco_rx_count); 3153 if (conn->sco_rx_count == 10) { 3154 // use first timestamp as is and pretent it just started 3155 conn->sco_rx_ms = now; 3156 conn->sco_rx_valid = 1; 3157 conn->sco_rx_count = 0; 3158 sco_schedule_tx(conn); 3159 } 3160 } else { 3161 // track expected arrival timme 3162 conn->sco_rx_count++; 3163 conn->sco_rx_ms += 7; 3164 int delta = (int32_t) (now - conn->sco_rx_ms); 3165 if (delta > 0){ 3166 conn->sco_rx_ms++; 3167 } 3168 // log_debug("sco rx %u", conn->sco_rx_ms); 3169 sco_schedule_tx(conn); 3170 } 3171 } 3172 } 3173 #endif 3174 3175 // deliver to app 3176 if (hci_stack->sco_packet_handler) { 3177 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3178 } 3179 3180 #ifdef HAVE_SCO_TRANSPORT 3181 // We can send one packet for each received packet 3182 conn->sco_tx_ready++; 3183 hci_notify_if_sco_can_send_now(); 3184 #endif 3185 3186 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3187 conn->num_packets_completed++; 3188 hci_stack->host_completed_packets = 1; 3189 hci_run(); 3190 #endif 3191 } 3192 #endif 3193 3194 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3195 hci_dump_packet(packet_type, 1, packet, size); 3196 switch (packet_type) { 3197 case HCI_EVENT_PACKET: 3198 event_handler(packet, size); 3199 break; 3200 case HCI_ACL_DATA_PACKET: 3201 acl_handler(packet, size); 3202 break; 3203 #ifdef ENABLE_CLASSIC 3204 case HCI_SCO_DATA_PACKET: 3205 sco_handler(packet, size); 3206 break; 3207 #endif 3208 default: 3209 break; 3210 } 3211 } 3212 3213 /** 3214 * @brief Add event packet handler. 3215 */ 3216 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3217 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3218 } 3219 3220 3221 /** Register HCI packet handlers */ 3222 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3223 hci_stack->acl_packet_handler = handler; 3224 } 3225 3226 #ifdef ENABLE_CLASSIC 3227 /** 3228 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3229 */ 3230 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3231 hci_stack->sco_packet_handler = handler; 3232 } 3233 #endif 3234 3235 static void hci_state_reset(void){ 3236 // no connections yet 3237 hci_stack->connections = NULL; 3238 3239 // keep discoverable/connectable as this has been requested by the client(s) 3240 // hci_stack->discoverable = 0; 3241 // hci_stack->connectable = 0; 3242 // hci_stack->bondable = 1; 3243 // hci_stack->own_addr_type = 0; 3244 3245 // buffer is free 3246 hci_stack->hci_packet_buffer_reserved = 0; 3247 3248 // no pending cmds 3249 hci_stack->decline_reason = 0; 3250 hci_stack->new_scan_enable_value = 0xff; 3251 3252 hci_stack->secure_connections_active = false; 3253 3254 #ifdef ENABLE_CLASSIC 3255 hci_stack->new_page_scan_interval = 0xffff; 3256 hci_stack->new_page_scan_window = 0xffff; 3257 hci_stack->new_page_scan_type = 0xff; 3258 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3259 #endif 3260 3261 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3262 hci_stack->classic_read_local_oob_data = true; 3263 #endif 3264 3265 // LE 3266 #ifdef ENABLE_BLE 3267 memset(hci_stack->le_random_address, 0, 6); 3268 hci_stack->le_random_address_set = 0; 3269 #endif 3270 #ifdef ENABLE_LE_CENTRAL 3271 hci_stack->le_scanning_active = false; 3272 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3273 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3274 hci_stack->le_whitelist_capacity = 0; 3275 #endif 3276 #ifdef ENABLE_LE_PERIPHERAL 3277 hci_stack->le_advertisements_active = false; 3278 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3279 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3280 } 3281 if (hci_stack->le_advertisements_data != NULL){ 3282 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3283 } 3284 #endif 3285 } 3286 3287 #ifdef ENABLE_CLASSIC 3288 /** 3289 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3290 */ 3291 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3292 // store and open remote device db 3293 hci_stack->link_key_db = link_key_db; 3294 if (hci_stack->link_key_db) { 3295 hci_stack->link_key_db->open(); 3296 } 3297 } 3298 #endif 3299 3300 void hci_init(const hci_transport_t *transport, const void *config){ 3301 3302 #ifdef HAVE_MALLOC 3303 if (!hci_stack) { 3304 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3305 } 3306 #else 3307 hci_stack = &hci_stack_static; 3308 #endif 3309 memset(hci_stack, 0, sizeof(hci_stack_t)); 3310 3311 // reference to use transport layer implementation 3312 hci_stack->hci_transport = transport; 3313 3314 // reference to used config 3315 hci_stack->config = config; 3316 3317 // setup pointer for outgoing packet buffer 3318 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3319 3320 // max acl payload size defined in config.h 3321 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3322 3323 // register packet handlers with transport 3324 transport->register_packet_handler(&packet_handler); 3325 3326 hci_stack->state = HCI_STATE_OFF; 3327 3328 // class of device 3329 hci_stack->class_of_device = 0x007a020c; // Smartphone 3330 3331 // bondable by default 3332 hci_stack->bondable = 1; 3333 3334 #ifdef ENABLE_CLASSIC 3335 // classic name 3336 hci_stack->local_name = default_classic_name; 3337 3338 // Master slave policy 3339 hci_stack->master_slave_policy = 1; 3340 3341 // Allow Role Switch 3342 hci_stack->allow_role_switch = 1; 3343 3344 // Default / minimum security level = 2 3345 hci_stack->gap_security_level = LEVEL_2; 3346 3347 // Default Security Mode 4 3348 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3349 3350 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3351 hci_stack->gap_required_encyrption_key_size = 7; 3352 3353 // Link Supervision Timeout 3354 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3355 3356 #endif 3357 3358 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3359 hci_stack->ssp_enable = 1; 3360 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3361 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3362 hci_stack->ssp_auto_accept = 1; 3363 3364 // Secure Connections: enable (requires support from Controller) 3365 hci_stack->secure_connections_enable = true; 3366 3367 // voice setting - signed 16 bit pcm data with CVSD over the air 3368 hci_stack->sco_voice_setting = 0x60; 3369 3370 #ifdef ENABLE_LE_CENTRAL 3371 // connection parameter to use for outgoing connections 3372 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3373 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3374 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3375 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3376 hci_stack->le_connection_latency = 4; // 4 3377 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3378 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3379 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3380 3381 // default LE Scanning 3382 hci_stack->le_scan_type = 0x1; // active 3383 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3384 hci_stack->le_scan_window = 0x30; // 30 ms 3385 #endif 3386 3387 #ifdef ENABLE_LE_PERIPHERAL 3388 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3389 #endif 3390 3391 // connection parameter range used to answer connection parameter update requests in l2cap 3392 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3393 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3394 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3395 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3396 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3397 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3398 3399 hci_state_reset(); 3400 } 3401 3402 void hci_deinit(void){ 3403 #ifdef HAVE_MALLOC 3404 if (hci_stack) { 3405 free(hci_stack); 3406 } 3407 #endif 3408 hci_stack = NULL; 3409 3410 #ifdef ENABLE_CLASSIC 3411 disable_l2cap_timeouts = 0; 3412 #endif 3413 } 3414 3415 /** 3416 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3417 */ 3418 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3419 hci_stack->chipset = chipset_driver; 3420 3421 // reset chipset driver - init is also called on power_up 3422 if (hci_stack->chipset && hci_stack->chipset->init){ 3423 hci_stack->chipset->init(hci_stack->config); 3424 } 3425 } 3426 3427 /** 3428 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3429 */ 3430 void hci_set_control(const btstack_control_t *hardware_control){ 3431 // references to used control implementation 3432 hci_stack->control = hardware_control; 3433 // init with transport config 3434 hardware_control->init(hci_stack->config); 3435 } 3436 3437 void hci_close(void){ 3438 3439 #ifdef ENABLE_CLASSIC 3440 // close remote device db 3441 if (hci_stack->link_key_db) { 3442 hci_stack->link_key_db->close(); 3443 } 3444 #endif 3445 3446 btstack_linked_list_iterator_t lit; 3447 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3448 while (btstack_linked_list_iterator_has_next(&lit)){ 3449 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3450 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3451 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3452 hci_shutdown_connection(connection); 3453 } 3454 3455 hci_power_control(HCI_POWER_OFF); 3456 3457 #ifdef HAVE_MALLOC 3458 free(hci_stack); 3459 #endif 3460 hci_stack = NULL; 3461 } 3462 3463 #ifdef HAVE_SCO_TRANSPORT 3464 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3465 hci_stack->sco_transport = sco_transport; 3466 sco_transport->register_packet_handler(&packet_handler); 3467 } 3468 #endif 3469 3470 #ifdef ENABLE_CLASSIC 3471 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3472 // validate ranage and set 3473 if (encryption_key_size < 7) return; 3474 if (encryption_key_size > 16) return; 3475 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3476 } 3477 3478 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3479 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3480 hci_stack->gap_security_mode = security_mode; 3481 return ERROR_CODE_SUCCESS; 3482 } else { 3483 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3484 } 3485 } 3486 3487 gap_security_mode_t gap_get_security_mode(void){ 3488 return hci_stack->gap_security_mode; 3489 } 3490 3491 void gap_set_security_level(gap_security_level_t security_level){ 3492 hci_stack->gap_security_level = security_level; 3493 } 3494 3495 gap_security_level_t gap_get_security_level(void){ 3496 return hci_stack->gap_security_level; 3497 } 3498 3499 void gap_set_secure_connections_only_mode(bool enable){ 3500 hci_stack->gap_secure_connections_only_mode = enable; 3501 } 3502 3503 bool gap_get_secure_connections_only_mode(void){ 3504 return hci_stack->gap_secure_connections_only_mode; 3505 } 3506 #endif 3507 3508 #ifdef ENABLE_CLASSIC 3509 void gap_set_class_of_device(uint32_t class_of_device){ 3510 hci_stack->class_of_device = class_of_device; 3511 } 3512 3513 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3514 hci_stack->default_link_policy_settings = default_link_policy_settings; 3515 } 3516 3517 void gap_set_allow_role_switch(bool allow_role_switch){ 3518 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3519 } 3520 3521 uint8_t hci_get_allow_role_switch(void){ 3522 return hci_stack->allow_role_switch; 3523 } 3524 3525 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3526 hci_stack->link_supervision_timeout = link_supervision_timeout; 3527 } 3528 3529 void hci_disable_l2cap_timeout_check(void){ 3530 disable_l2cap_timeouts = 1; 3531 } 3532 #endif 3533 3534 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3535 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3536 void hci_set_bd_addr(bd_addr_t addr){ 3537 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3538 hci_stack->custom_bd_addr_set = 1; 3539 } 3540 #endif 3541 3542 // State-Module-Driver overview 3543 // state module low-level 3544 // HCI_STATE_OFF off close 3545 // HCI_STATE_INITIALIZING, on open 3546 // HCI_STATE_WORKING, on open 3547 // HCI_STATE_HALTING, on open 3548 // HCI_STATE_SLEEPING, off/sleep close 3549 // HCI_STATE_FALLING_ASLEEP on open 3550 3551 static int hci_power_control_on(void){ 3552 3553 // power on 3554 int err = 0; 3555 if (hci_stack->control && hci_stack->control->on){ 3556 err = (*hci_stack->control->on)(); 3557 } 3558 if (err){ 3559 log_error( "POWER_ON failed"); 3560 hci_emit_hci_open_failed(); 3561 return err; 3562 } 3563 3564 // int chipset driver 3565 if (hci_stack->chipset && hci_stack->chipset->init){ 3566 hci_stack->chipset->init(hci_stack->config); 3567 } 3568 3569 // init transport 3570 if (hci_stack->hci_transport->init){ 3571 hci_stack->hci_transport->init(hci_stack->config); 3572 } 3573 3574 // open transport 3575 err = hci_stack->hci_transport->open(); 3576 if (err){ 3577 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3578 if (hci_stack->control && hci_stack->control->off){ 3579 (*hci_stack->control->off)(); 3580 } 3581 hci_emit_hci_open_failed(); 3582 return err; 3583 } 3584 return 0; 3585 } 3586 3587 static void hci_power_control_off(void){ 3588 3589 log_info("hci_power_control_off"); 3590 3591 // close low-level device 3592 hci_stack->hci_transport->close(); 3593 3594 log_info("hci_power_control_off - hci_transport closed"); 3595 3596 // power off 3597 if (hci_stack->control && hci_stack->control->off){ 3598 (*hci_stack->control->off)(); 3599 } 3600 3601 log_info("hci_power_control_off - control closed"); 3602 3603 hci_stack->state = HCI_STATE_OFF; 3604 } 3605 3606 static void hci_power_control_sleep(void){ 3607 3608 log_info("hci_power_control_sleep"); 3609 3610 #if 0 3611 // don't close serial port during sleep 3612 3613 // close low-level device 3614 hci_stack->hci_transport->close(hci_stack->config); 3615 #endif 3616 3617 // sleep mode 3618 if (hci_stack->control && hci_stack->control->sleep){ 3619 (*hci_stack->control->sleep)(); 3620 } 3621 3622 hci_stack->state = HCI_STATE_SLEEPING; 3623 } 3624 3625 static int hci_power_control_wake(void){ 3626 3627 log_info("hci_power_control_wake"); 3628 3629 // wake on 3630 if (hci_stack->control && hci_stack->control->wake){ 3631 (*hci_stack->control->wake)(); 3632 } 3633 3634 #if 0 3635 // open low-level device 3636 int err = hci_stack->hci_transport->open(hci_stack->config); 3637 if (err){ 3638 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3639 if (hci_stack->control && hci_stack->control->off){ 3640 (*hci_stack->control->off)(); 3641 } 3642 hci_emit_hci_open_failed(); 3643 return err; 3644 } 3645 #endif 3646 3647 return 0; 3648 } 3649 3650 static void hci_power_transition_to_initializing(void){ 3651 // set up state machine 3652 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3653 hci_stack->hci_packet_buffer_reserved = 0; 3654 hci_stack->state = HCI_STATE_INITIALIZING; 3655 hci_stack->substate = HCI_INIT_SEND_RESET; 3656 } 3657 3658 // returns error 3659 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3660 int err; 3661 switch (power_mode){ 3662 case HCI_POWER_ON: 3663 err = hci_power_control_on(); 3664 if (err != 0) { 3665 log_error("hci_power_control_on() error %d", err); 3666 return err; 3667 } 3668 hci_power_transition_to_initializing(); 3669 break; 3670 case HCI_POWER_OFF: 3671 // do nothing 3672 break; 3673 case HCI_POWER_SLEEP: 3674 // do nothing (with SLEEP == OFF) 3675 break; 3676 default: 3677 btstack_assert(false); 3678 break; 3679 } 3680 return ERROR_CODE_SUCCESS; 3681 } 3682 3683 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3684 switch (power_mode){ 3685 case HCI_POWER_ON: 3686 // do nothing 3687 break; 3688 case HCI_POWER_OFF: 3689 // no connections yet, just turn it off 3690 hci_power_control_off(); 3691 break; 3692 case HCI_POWER_SLEEP: 3693 // no connections yet, just turn it off 3694 hci_power_control_sleep(); 3695 break; 3696 default: 3697 btstack_assert(false); 3698 break; 3699 } 3700 return ERROR_CODE_SUCCESS; 3701 } 3702 3703 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3704 switch (power_mode){ 3705 case HCI_POWER_ON: 3706 // do nothing 3707 break; 3708 case HCI_POWER_OFF: 3709 // see hci_run 3710 hci_stack->state = HCI_STATE_HALTING; 3711 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3712 break; 3713 case HCI_POWER_SLEEP: 3714 // see hci_run 3715 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3716 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3717 break; 3718 default: 3719 btstack_assert(false); 3720 break; 3721 } 3722 return ERROR_CODE_SUCCESS; 3723 } 3724 3725 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3726 switch (power_mode){ 3727 case HCI_POWER_ON: 3728 hci_power_transition_to_initializing(); 3729 break; 3730 case HCI_POWER_OFF: 3731 // do nothing 3732 break; 3733 case HCI_POWER_SLEEP: 3734 // see hci_run 3735 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3736 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3737 break; 3738 default: 3739 btstack_assert(false); 3740 break; 3741 } 3742 return ERROR_CODE_SUCCESS; 3743 } 3744 3745 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3746 switch (power_mode){ 3747 case HCI_POWER_ON: 3748 3749 #ifdef HAVE_PLATFORM_IPHONE_OS 3750 // nothing to do, if H4 supports power management 3751 if (btstack_control_iphone_power_management_enabled()){ 3752 hci_stack->state = HCI_STATE_INITIALIZING; 3753 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3754 break; 3755 } 3756 #endif 3757 hci_power_transition_to_initializing(); 3758 break; 3759 case HCI_POWER_OFF: 3760 // see hci_run 3761 hci_stack->state = HCI_STATE_HALTING; 3762 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3763 break; 3764 case HCI_POWER_SLEEP: 3765 // do nothing 3766 break; 3767 default: 3768 btstack_assert(false); 3769 break; 3770 } 3771 return ERROR_CODE_SUCCESS; 3772 } 3773 3774 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3775 int err; 3776 switch (power_mode){ 3777 case HCI_POWER_ON: 3778 #ifdef HAVE_PLATFORM_IPHONE_OS 3779 // nothing to do, if H4 supports power management 3780 if (btstack_control_iphone_power_management_enabled()){ 3781 hci_stack->state = HCI_STATE_INITIALIZING; 3782 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3783 hci_update_scan_enable(); 3784 break; 3785 } 3786 #endif 3787 err = hci_power_control_wake(); 3788 if (err) return err; 3789 hci_power_transition_to_initializing(); 3790 break; 3791 case HCI_POWER_OFF: 3792 hci_stack->state = HCI_STATE_HALTING; 3793 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3794 break; 3795 case HCI_POWER_SLEEP: 3796 // do nothing 3797 break; 3798 default: 3799 btstack_assert(false); 3800 break; 3801 } 3802 return ERROR_CODE_SUCCESS; 3803 } 3804 3805 int hci_power_control(HCI_POWER_MODE power_mode){ 3806 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3807 int err = 0; 3808 switch (hci_stack->state){ 3809 case HCI_STATE_OFF: 3810 err = hci_power_control_state_off(power_mode); 3811 break; 3812 case HCI_STATE_INITIALIZING: 3813 err = hci_power_control_state_initializing(power_mode); 3814 break; 3815 case HCI_STATE_WORKING: 3816 err = hci_power_control_state_working(power_mode); 3817 break; 3818 case HCI_STATE_HALTING: 3819 err = hci_power_control_state_halting(power_mode); 3820 break; 3821 case HCI_STATE_FALLING_ASLEEP: 3822 err = hci_power_control_state_falling_asleep(power_mode); 3823 break; 3824 case HCI_STATE_SLEEPING: 3825 err = hci_power_control_state_sleeping(power_mode); 3826 break; 3827 default: 3828 btstack_assert(false); 3829 break; 3830 } 3831 if (err != 0){ 3832 return err; 3833 } 3834 3835 // create internal event 3836 hci_emit_state(); 3837 3838 // trigger next/first action 3839 hci_run(); 3840 3841 return 0; 3842 } 3843 3844 3845 #ifdef ENABLE_CLASSIC 3846 3847 static void hci_update_scan_enable(void){ 3848 // 2 = page scan, 1 = inq scan 3849 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3850 hci_run(); 3851 } 3852 3853 void gap_discoverable_control(uint8_t enable){ 3854 if (enable) enable = 1; // normalize argument 3855 3856 if (hci_stack->discoverable == enable){ 3857 hci_emit_discoverable_enabled(hci_stack->discoverable); 3858 return; 3859 } 3860 3861 hci_stack->discoverable = enable; 3862 hci_update_scan_enable(); 3863 } 3864 3865 void gap_connectable_control(uint8_t enable){ 3866 if (enable) enable = 1; // normalize argument 3867 3868 // don't emit event 3869 if (hci_stack->connectable == enable) return; 3870 3871 hci_stack->connectable = enable; 3872 hci_update_scan_enable(); 3873 } 3874 #endif 3875 3876 void gap_local_bd_addr(bd_addr_t address_buffer){ 3877 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3878 } 3879 3880 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3881 static void hci_host_num_completed_packets(void){ 3882 3883 // create packet manually as arrays are not supported and num_commands should not get reduced 3884 hci_reserve_packet_buffer(); 3885 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3886 3887 uint16_t size = 0; 3888 uint16_t num_handles = 0; 3889 packet[size++] = 0x35; 3890 packet[size++] = 0x0c; 3891 size++; // skip param len 3892 size++; // skip num handles 3893 3894 // add { handle, packets } entries 3895 btstack_linked_item_t * it; 3896 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3897 hci_connection_t * connection = (hci_connection_t *) it; 3898 if (connection->num_packets_completed){ 3899 little_endian_store_16(packet, size, connection->con_handle); 3900 size += 2; 3901 little_endian_store_16(packet, size, connection->num_packets_completed); 3902 size += 2; 3903 // 3904 num_handles++; 3905 connection->num_packets_completed = 0; 3906 } 3907 } 3908 3909 packet[2] = size - 3; 3910 packet[3] = num_handles; 3911 3912 hci_stack->host_completed_packets = 0; 3913 3914 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3915 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3916 3917 // release packet buffer for synchronous transport implementations 3918 if (hci_transport_synchronous()){ 3919 hci_release_packet_buffer(); 3920 hci_emit_transport_packet_sent(); 3921 } 3922 } 3923 #endif 3924 3925 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3926 UNUSED(ds); 3927 hci_stack->substate = HCI_HALTING_CLOSE; 3928 // allow packet handlers to defer final shutdown 3929 hci_emit_state(); 3930 hci_run(); 3931 } 3932 3933 static bool hci_run_acl_fragments(void){ 3934 if (hci_stack->acl_fragmentation_total_size > 0u) { 3935 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3936 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3937 if (connection) { 3938 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3939 hci_send_acl_packet_fragments(connection); 3940 return true; 3941 } 3942 } else { 3943 // connection gone -> discard further fragments 3944 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3945 hci_stack->acl_fragmentation_total_size = 0; 3946 hci_stack->acl_fragmentation_pos = 0; 3947 } 3948 } 3949 return false; 3950 } 3951 3952 #ifdef ENABLE_CLASSIC 3953 static bool hci_run_general_gap_classic(void){ 3954 3955 // decline incoming connections 3956 if (hci_stack->decline_reason){ 3957 uint8_t reason = hci_stack->decline_reason; 3958 hci_stack->decline_reason = 0; 3959 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3960 return true; 3961 } 3962 // write page scan activity 3963 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_interval != 0xffff) && hci_classic_supported()){ 3964 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 3965 hci_stack->new_page_scan_interval = 0xffff; 3966 hci_stack->new_page_scan_window = 0xffff; 3967 return true; 3968 } 3969 // write page scan type 3970 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_type != 0xff) && hci_classic_supported()){ 3971 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 3972 hci_stack->new_page_scan_type = 0xff; 3973 return true; 3974 } 3975 // send scan enable 3976 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3977 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3978 hci_stack->new_scan_enable_value = 0xff; 3979 return true; 3980 } 3981 // start/stop inquiry 3982 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3983 uint8_t duration = hci_stack->inquiry_state; 3984 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 3985 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 3986 return true; 3987 } 3988 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3989 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3990 hci_send_cmd(&hci_inquiry_cancel); 3991 return true; 3992 } 3993 // remote name request 3994 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3995 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3996 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3997 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3998 return true; 3999 } 4000 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4001 // Local OOB data 4002 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 4003 hci_stack->classic_read_local_oob_data = false; 4004 if (hci_stack->local_supported_commands[1] & 0x10u){ 4005 hci_send_cmd(&hci_read_local_extended_oob_data); 4006 } else { 4007 hci_send_cmd(&hci_read_local_oob_data); 4008 } 4009 } 4010 #endif 4011 // pairing 4012 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4013 uint8_t state = hci_stack->gap_pairing_state; 4014 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4015 uint8_t pin_code[16]; 4016 switch (state){ 4017 case GAP_PAIRING_STATE_SEND_PIN: 4018 memset(pin_code, 0, 16); 4019 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4020 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4021 break; 4022 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4023 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4024 break; 4025 case GAP_PAIRING_STATE_SEND_PASSKEY: 4026 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4027 break; 4028 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4029 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4030 break; 4031 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4032 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4033 break; 4034 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4035 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4036 break; 4037 default: 4038 break; 4039 } 4040 return true; 4041 } 4042 return false; 4043 } 4044 #endif 4045 4046 #ifdef ENABLE_BLE 4047 static bool hci_run_general_gap_le(void){ 4048 4049 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4050 4051 if (hci_stack->state != HCI_STATE_WORKING) return false; 4052 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4053 4054 4055 // Phase 1: collect what to stop 4056 4057 bool scanning_stop = false; 4058 bool connecting_stop = false; 4059 bool advertising_stop = false; 4060 4061 #ifndef ENABLE_LE_CENTRAL 4062 UNUSED(scanning_stop); 4063 UNUSED(connecting_stop); 4064 #endif 4065 #ifndef ENABLE_LE_PERIPHERAL 4066 UNUSED(advertising_stop); 4067 #endif 4068 4069 // check if whitelist needs modification 4070 bool whitelist_modification_pending = false; 4071 btstack_linked_list_iterator_t lit; 4072 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4073 while (btstack_linked_list_iterator_has_next(&lit)){ 4074 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4075 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4076 whitelist_modification_pending = true; 4077 break; 4078 } 4079 } 4080 // check if resolving list needs modification 4081 bool resolving_list_modification_pending = false; 4082 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4083 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4084 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4085 resolving_list_modification_pending = true; 4086 } 4087 #endif 4088 4089 #ifdef ENABLE_LE_CENTRAL 4090 // scanning control 4091 if (hci_stack->le_scanning_active) { 4092 // stop if: 4093 // - parameter change required 4094 // - it's disabled 4095 // - whitelist change required but used for scanning 4096 // - resolving list modified 4097 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4098 if ((hci_stack->le_scanning_param_update) || 4099 !hci_stack->le_scanning_enabled || 4100 scanning_uses_whitelist || 4101 resolving_list_modification_pending){ 4102 4103 scanning_stop = true; 4104 } 4105 } 4106 #endif 4107 4108 #ifdef ENABLE_LE_CENTRAL 4109 // connecting control 4110 bool connecting_with_whitelist; 4111 switch (hci_stack->le_connecting_state){ 4112 case LE_CONNECTING_DIRECT: 4113 case LE_CONNECTING_WHITELIST: 4114 // stop connecting if: 4115 // - connecting uses white and whitelist modification pending 4116 // - if it got disabled 4117 // - resolving list modified 4118 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4119 if ((connecting_with_whitelist && whitelist_modification_pending) || 4120 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4121 resolving_list_modification_pending) { 4122 4123 connecting_stop = true; 4124 } 4125 break; 4126 default: 4127 break; 4128 } 4129 #endif 4130 4131 #ifdef ENABLE_LE_PERIPHERAL 4132 // le advertisement control 4133 if (hci_stack->le_advertisements_active){ 4134 // stop if: 4135 // - parameter change required 4136 // - it's disabled 4137 // - whitelist change required but used for advertisement filter policy 4138 // - resolving list modified 4139 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4140 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4141 if (advertising_change || 4142 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4143 (advertising_uses_whitelist & whitelist_modification_pending) || 4144 resolving_list_modification_pending) { 4145 4146 advertising_stop = true; 4147 } 4148 } 4149 #endif 4150 4151 4152 // Phase 2: stop everything that should be off during modifications 4153 4154 #ifdef ENABLE_LE_CENTRAL 4155 if (scanning_stop){ 4156 hci_stack->le_scanning_active = false; 4157 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4158 return true; 4159 } 4160 #endif 4161 4162 #ifdef ENABLE_LE_CENTRAL 4163 if (connecting_stop){ 4164 hci_send_cmd(&hci_le_create_connection_cancel); 4165 return true; 4166 } 4167 #endif 4168 4169 #ifdef ENABLE_LE_PERIPHERAL 4170 if (advertising_stop){ 4171 hci_stack->le_advertisements_active = false; 4172 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4173 return true; 4174 } 4175 #endif 4176 4177 // Phase 3: modify 4178 4179 #ifdef ENABLE_LE_CENTRAL 4180 if (hci_stack->le_scanning_param_update){ 4181 hci_stack->le_scanning_param_update = false; 4182 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4183 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4184 return true; 4185 } 4186 #endif 4187 4188 #ifdef ENABLE_LE_PERIPHERAL 4189 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4190 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4191 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4192 hci_send_cmd(&hci_le_set_advertising_parameters, 4193 hci_stack->le_advertisements_interval_min, 4194 hci_stack->le_advertisements_interval_max, 4195 hci_stack->le_advertisements_type, 4196 hci_stack->le_advertisements_own_addr_type, 4197 hci_stack->le_advertisements_direct_address_type, 4198 hci_stack->le_advertisements_direct_address, 4199 hci_stack->le_advertisements_channel_map, 4200 hci_stack->le_advertisements_filter_policy); 4201 return true; 4202 } 4203 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4204 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4205 uint8_t adv_data_clean[31]; 4206 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4207 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4208 hci_stack->le_advertisements_data_len); 4209 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4210 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4211 return true; 4212 } 4213 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4214 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4215 uint8_t scan_data_clean[31]; 4216 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4217 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4218 hci_stack->le_scan_response_data_len); 4219 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4220 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4221 return true; 4222 } 4223 #endif 4224 4225 4226 #ifdef ENABLE_LE_CENTRAL 4227 // if connect with whitelist was active and is not cancelled yet, wait until next time 4228 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4229 #endif 4230 4231 // LE Whitelist Management 4232 if (whitelist_modification_pending){ 4233 // add/remove entries 4234 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4235 while (btstack_linked_list_iterator_has_next(&lit)){ 4236 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4237 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4238 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4239 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4240 return true; 4241 } 4242 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4243 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4244 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4245 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4246 return true; 4247 } 4248 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4249 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4250 btstack_memory_whitelist_entry_free(entry); 4251 } 4252 } 4253 } 4254 4255 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4256 // LE Resolving List Management 4257 if (resolving_list_supported) { 4258 uint16_t i; 4259 switch (hci_stack->le_resolving_list_state) { 4260 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4261 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4262 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4263 return true; 4264 case LE_RESOLVING_LIST_READ_SIZE: 4265 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4266 hci_send_cmd(&hci_le_read_resolving_list_size); 4267 return true; 4268 case LE_RESOLVING_LIST_SEND_CLEAR: 4269 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4270 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4271 sizeof(hci_stack->le_resolving_list_add_entries)); 4272 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4273 sizeof(hci_stack->le_resolving_list_remove_entries)); 4274 hci_send_cmd(&hci_le_clear_resolving_list); 4275 return true; 4276 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4277 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4278 uint8_t offset = i >> 3; 4279 uint8_t mask = 1 << (i & 7); 4280 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4281 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4282 bd_addr_t peer_identity_addreses; 4283 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4284 sm_key_t peer_irk; 4285 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4286 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4287 4288 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4289 // trigger whitelist entry 'update' (work around for controller bug) 4290 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4291 while (btstack_linked_list_iterator_has_next(&lit)) { 4292 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4293 if (entry->address_type != peer_identity_addr_type) continue; 4294 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4295 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4296 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4297 } 4298 #endif 4299 4300 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4301 peer_identity_addreses); 4302 return true; 4303 } 4304 4305 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4306 4307 /* fall through */ 4308 4309 case LE_RESOLVING_LIST_ADD_ENTRIES: 4310 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4311 uint8_t offset = i >> 3; 4312 uint8_t mask = 1 << (i & 7); 4313 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4314 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4315 bd_addr_t peer_identity_addreses; 4316 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4317 sm_key_t peer_irk; 4318 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4319 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4320 const uint8_t *local_irk = gap_get_persistent_irk(); 4321 // command uses format specifier 'P' that stores 16-byte value without flip 4322 uint8_t local_irk_flipped[16]; 4323 uint8_t peer_irk_flipped[16]; 4324 reverse_128(local_irk, local_irk_flipped); 4325 reverse_128(peer_irk, peer_irk_flipped); 4326 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4327 peer_irk_flipped, local_irk_flipped); 4328 return true; 4329 } 4330 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4331 break; 4332 4333 default: 4334 break; 4335 } 4336 } 4337 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4338 #endif 4339 4340 // Phase 4: restore state 4341 4342 #ifdef ENABLE_LE_CENTRAL 4343 // re-start scanning 4344 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4345 hci_stack->le_scanning_active = true; 4346 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4347 return true; 4348 } 4349 #endif 4350 4351 #ifdef ENABLE_LE_CENTRAL 4352 // re-start connecting 4353 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4354 bd_addr_t null_addr; 4355 memset(null_addr, 0, 6); 4356 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4357 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4358 hci_send_cmd(&hci_le_create_connection, 4359 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4360 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4361 1, // use whitelist 4362 0, // peer address type 4363 null_addr, // peer bd addr 4364 hci_stack->le_connection_own_addr_type, // our addr type: 4365 hci_stack->le_connection_interval_min, // conn interval min 4366 hci_stack->le_connection_interval_max, // conn interval max 4367 hci_stack->le_connection_latency, // conn latency 4368 hci_stack->le_supervision_timeout, // conn latency 4369 hci_stack->le_minimum_ce_length, // min ce length 4370 hci_stack->le_maximum_ce_length // max ce length 4371 ); 4372 return true; 4373 } 4374 #endif 4375 4376 #ifdef ENABLE_LE_PERIPHERAL 4377 // re-start advertising 4378 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4379 // check if advertisements should be enabled given 4380 hci_stack->le_advertisements_active = true; 4381 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_advertisements_own_address); 4382 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4383 return true; 4384 } 4385 #endif 4386 4387 return false; 4388 } 4389 #endif 4390 4391 static bool hci_run_general_pending_commands(void){ 4392 btstack_linked_item_t * it; 4393 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4394 hci_connection_t * connection = (hci_connection_t *) it; 4395 4396 switch(connection->state){ 4397 case SEND_CREATE_CONNECTION: 4398 switch(connection->address_type){ 4399 #ifdef ENABLE_CLASSIC 4400 case BD_ADDR_TYPE_ACL: 4401 log_info("sending hci_create_connection"); 4402 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4403 break; 4404 #endif 4405 default: 4406 #ifdef ENABLE_BLE 4407 #ifdef ENABLE_LE_CENTRAL 4408 log_info("sending hci_le_create_connection"); 4409 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4410 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4411 hci_send_cmd(&hci_le_create_connection, 4412 hci_stack->le_connection_scan_interval, // conn scan interval 4413 hci_stack->le_connection_scan_window, // conn scan windows 4414 0, // don't use whitelist 4415 connection->address_type, // peer address type 4416 connection->address, // peer bd addr 4417 hci_stack->le_connection_own_addr_type, // our addr type: 4418 hci_stack->le_connection_interval_min, // conn interval min 4419 hci_stack->le_connection_interval_max, // conn interval max 4420 hci_stack->le_connection_latency, // conn latency 4421 hci_stack->le_supervision_timeout, // conn latency 4422 hci_stack->le_minimum_ce_length, // min ce length 4423 hci_stack->le_maximum_ce_length // max ce length 4424 ); 4425 connection->state = SENT_CREATE_CONNECTION; 4426 #endif 4427 #endif 4428 break; 4429 } 4430 return true; 4431 4432 #ifdef ENABLE_CLASSIC 4433 case RECEIVED_CONNECTION_REQUEST: 4434 connection->role = HCI_ROLE_SLAVE; 4435 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4436 log_info("sending hci_accept_connection_request"); 4437 connection->state = ACCEPTED_CONNECTION_REQUEST; 4438 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4439 } 4440 return true; 4441 #endif 4442 4443 #ifdef ENABLE_BLE 4444 #ifdef ENABLE_LE_CENTRAL 4445 case SEND_CANCEL_CONNECTION: 4446 connection->state = SENT_CANCEL_CONNECTION; 4447 hci_send_cmd(&hci_le_create_connection_cancel); 4448 return true; 4449 #endif 4450 #endif 4451 case SEND_DISCONNECT: 4452 connection->state = SENT_DISCONNECT; 4453 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4454 return true; 4455 4456 default: 4457 break; 4458 } 4459 4460 // no further commands if connection is about to get shut down 4461 if (connection->state == SENT_DISCONNECT) continue; 4462 4463 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4464 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4465 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4466 return true; 4467 } 4468 4469 #ifdef ENABLE_CLASSIC 4470 4471 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4472 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4473 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4474 return true; 4475 } 4476 4477 // Handling link key request requires remote supported features 4478 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4479 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4480 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4481 4482 // lookup link key using cached key first 4483 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4484 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4485 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4486 } 4487 4488 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4489 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4490 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(connection->link_key_type) == 1) && !sc_enabled_remote; 4491 if (sc_downgrade){ 4492 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4493 connection->state = SENT_DISCONNECT; 4494 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4495 return true; 4496 } 4497 4498 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4499 if (have_link_key && security_level_sufficient){ 4500 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4501 } else { 4502 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4503 } 4504 return true; 4505 } 4506 4507 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4508 log_info("denying to pin request"); 4509 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4510 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4511 return true; 4512 } 4513 4514 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4515 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4516 // set authentication requirements: 4517 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4518 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4519 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4520 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4521 authreq |= 1; 4522 } 4523 bool bonding = hci_stack->bondable; 4524 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4525 // if we have received IO Cap Response, we're in responder role 4526 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4527 if (bonding && !remote_bonding){ 4528 log_info("Remote not bonding, dropping local flag"); 4529 bonding = false; 4530 } 4531 } 4532 if (bonding){ 4533 if (connection->bonding_flags & BONDING_DEDICATED){ 4534 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4535 } else { 4536 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4537 } 4538 } 4539 uint8_t have_oob_data = 0; 4540 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4541 if (connection->classic_oob_c_192 != NULL){ 4542 have_oob_data |= 1; 4543 } 4544 if (connection->classic_oob_c_256 != NULL){ 4545 have_oob_data |= 2; 4546 } 4547 #endif 4548 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4549 return true; 4550 } 4551 4552 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4553 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4554 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4555 return true; 4556 } 4557 4558 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4559 if (connection->authentication_flags & SEND_REMOTE_OOB_DATA_REPLY){ 4560 connectionClearAuthenticationFlags(connection, SEND_REMOTE_OOB_DATA_REPLY); 4561 const uint8_t zero[16] = { 0 }; 4562 const uint8_t * r_192 = zero; 4563 const uint8_t * c_192 = zero; 4564 const uint8_t * r_256 = zero; 4565 const uint8_t * c_256 = zero; 4566 // verify P-256 OOB 4567 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4568 c_256 = connection->classic_oob_c_256; 4569 if (connection->classic_oob_r_256 != NULL) { 4570 r_256 = connection->classic_oob_r_256; 4571 } 4572 } 4573 // verify P-192 OOB 4574 if ((connection->classic_oob_c_192 != NULL)) { 4575 c_192 = connection->classic_oob_c_192; 4576 if (connection->classic_oob_r_192 != NULL) { 4577 r_192 = connection->classic_oob_r_192; 4578 } 4579 } 4580 // Reply 4581 if (c_256 != zero) { 4582 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4583 } else if (c_192 != zero){ 4584 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4585 } else { 4586 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4587 } 4588 return true; 4589 } 4590 #endif 4591 4592 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4593 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4594 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4595 return true; 4596 } 4597 4598 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4599 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4600 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4601 return true; 4602 } 4603 4604 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4605 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4606 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4607 return true; 4608 } 4609 4610 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4611 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4612 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4613 return true; 4614 } 4615 4616 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4617 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4618 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4619 return true; 4620 } 4621 4622 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4623 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4624 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4625 connection->state = SENT_DISCONNECT; 4626 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4627 return true; 4628 } 4629 4630 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4631 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4632 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4633 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4634 return true; 4635 } 4636 4637 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4638 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4639 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4640 return true; 4641 } 4642 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4643 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4644 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4645 return true; 4646 } 4647 #endif 4648 4649 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4650 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4651 #ifdef ENABLE_CLASSIC 4652 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4653 #endif 4654 if (connection->state != SENT_DISCONNECT){ 4655 connection->state = SENT_DISCONNECT; 4656 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4657 return true; 4658 } 4659 } 4660 4661 #ifdef ENABLE_CLASSIC 4662 uint16_t sniff_min_interval; 4663 switch (connection->sniff_min_interval){ 4664 case 0: 4665 break; 4666 case 0xffff: 4667 connection->sniff_min_interval = 0; 4668 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4669 return true; 4670 default: 4671 sniff_min_interval = connection->sniff_min_interval; 4672 connection->sniff_min_interval = 0; 4673 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4674 return true; 4675 } 4676 4677 if (connection->sniff_subrating_max_latency != 0xffff){ 4678 uint16_t max_latency = connection->sniff_subrating_max_latency; 4679 connection->sniff_subrating_max_latency = 0; 4680 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4681 return true; 4682 } 4683 4684 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4685 uint8_t service_type = (uint8_t) connection->qos_service_type; 4686 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4687 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); 4688 return true; 4689 } 4690 4691 if (connection->request_role != HCI_ROLE_INVALID){ 4692 hci_role_t role = connection->request_role; 4693 connection->request_role = HCI_ROLE_INVALID; 4694 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4695 return true; 4696 } 4697 #endif 4698 4699 #ifdef ENABLE_BLE 4700 switch (connection->le_con_parameter_update_state){ 4701 // response to L2CAP CON PARAMETER UPDATE REQUEST 4702 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4703 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4704 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4705 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4706 0x0000, 0xffff); 4707 return true; 4708 case CON_PARAMETER_UPDATE_REPLY: 4709 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4710 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4711 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4712 0x0000, 0xffff); 4713 return true; 4714 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4715 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4716 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4717 return true; 4718 default: 4719 break; 4720 } 4721 if (connection->le_phy_update_all_phys != 0xffu){ 4722 uint8_t all_phys = connection->le_phy_update_all_phys; 4723 connection->le_phy_update_all_phys = 0xff; 4724 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); 4725 return true; 4726 } 4727 #endif 4728 } 4729 return false; 4730 } 4731 4732 static void hci_run(void){ 4733 4734 bool done; 4735 4736 // send continuation fragments first, as they block the prepared packet buffer 4737 done = hci_run_acl_fragments(); 4738 if (done) return; 4739 4740 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4741 // send host num completed packets next as they don't require num_cmd_packets > 0 4742 if (!hci_can_send_comand_packet_transport()) return; 4743 if (hci_stack->host_completed_packets){ 4744 hci_host_num_completed_packets(); 4745 return; 4746 } 4747 #endif 4748 4749 if (!hci_can_send_command_packet_now()) return; 4750 4751 // global/non-connection oriented commands 4752 4753 4754 #ifdef ENABLE_CLASSIC 4755 // general gap classic 4756 done = hci_run_general_gap_classic(); 4757 if (done) return; 4758 #endif 4759 4760 #ifdef ENABLE_BLE 4761 // general gap le 4762 done = hci_run_general_gap_le(); 4763 if (done) return; 4764 #endif 4765 4766 // send pending HCI commands 4767 done = hci_run_general_pending_commands(); 4768 if (done) return; 4769 4770 // stack state sub statemachines 4771 hci_connection_t * connection; 4772 switch (hci_stack->state){ 4773 case HCI_STATE_INITIALIZING: 4774 hci_initializing_run(); 4775 break; 4776 4777 case HCI_STATE_HALTING: 4778 4779 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4780 switch (hci_stack->substate){ 4781 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4782 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4783 4784 #ifdef ENABLE_BLE 4785 #ifdef ENABLE_LE_CENTRAL 4786 // free whitelist entries 4787 { 4788 btstack_linked_list_iterator_t lit; 4789 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4790 while (btstack_linked_list_iterator_has_next(&lit)){ 4791 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4792 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4793 btstack_memory_whitelist_entry_free(entry); 4794 } 4795 } 4796 #endif 4797 #endif 4798 // close all open connections 4799 connection = (hci_connection_t *) hci_stack->connections; 4800 if (connection){ 4801 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4802 if (!hci_can_send_command_packet_now()) return; 4803 4804 // check state 4805 if (connection->state == SENT_DISCONNECT) return; 4806 connection->state = SENT_DISCONNECT; 4807 4808 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4809 4810 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4811 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4812 4813 // ... which would be ignored anyway as we shutdown (free) the connection now 4814 hci_shutdown_connection(connection); 4815 4816 // finally, send the disconnect command 4817 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4818 return; 4819 } 4820 4821 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4822 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4823 log_info("HCI_STATE_HALTING: wait 50 ms"); 4824 hci_stack->substate = HCI_HALTING_W4_TIMER; 4825 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4826 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4827 btstack_run_loop_add_timer(&hci_stack->timeout); 4828 break; 4829 } 4830 4831 /* fall through */ 4832 4833 case HCI_HALTING_CLOSE: 4834 log_info("HCI_STATE_HALTING, calling off"); 4835 4836 // switch mode 4837 hci_power_control_off(); 4838 4839 log_info("HCI_STATE_HALTING, emitting state"); 4840 hci_emit_state(); 4841 log_info("HCI_STATE_HALTING, done"); 4842 break; 4843 4844 case HCI_HALTING_W4_TIMER: 4845 // keep waiting 4846 4847 break; 4848 default: 4849 break; 4850 } 4851 4852 break; 4853 4854 case HCI_STATE_FALLING_ASLEEP: 4855 switch(hci_stack->substate) { 4856 case HCI_FALLING_ASLEEP_DISCONNECT: 4857 log_info("HCI_STATE_FALLING_ASLEEP"); 4858 // close all open connections 4859 connection = (hci_connection_t *) hci_stack->connections; 4860 4861 #ifdef HAVE_PLATFORM_IPHONE_OS 4862 // don't close connections, if H4 supports power management 4863 if (btstack_control_iphone_power_management_enabled()){ 4864 connection = NULL; 4865 } 4866 #endif 4867 if (connection){ 4868 4869 // send disconnect 4870 if (!hci_can_send_command_packet_now()) return; 4871 4872 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4873 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4874 4875 // send disconnected event right away - causes higher layer connections to get closed, too. 4876 hci_shutdown_connection(connection); 4877 return; 4878 } 4879 4880 if (hci_classic_supported()){ 4881 // disable page and inquiry scan 4882 if (!hci_can_send_command_packet_now()) return; 4883 4884 log_info("HCI_STATE_HALTING, disabling inq scans"); 4885 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4886 4887 // continue in next sub state 4888 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4889 break; 4890 } 4891 4892 /* fall through */ 4893 4894 case HCI_FALLING_ASLEEP_COMPLETE: 4895 log_info("HCI_STATE_HALTING, calling sleep"); 4896 #ifdef HAVE_PLATFORM_IPHONE_OS 4897 // don't actually go to sleep, if H4 supports power management 4898 if (btstack_control_iphone_power_management_enabled()){ 4899 // SLEEP MODE reached 4900 hci_stack->state = HCI_STATE_SLEEPING; 4901 hci_emit_state(); 4902 break; 4903 } 4904 #endif 4905 // switch mode 4906 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4907 hci_emit_state(); 4908 break; 4909 4910 default: 4911 break; 4912 } 4913 break; 4914 4915 default: 4916 break; 4917 } 4918 } 4919 4920 int hci_send_cmd_packet(uint8_t *packet, int size){ 4921 // house-keeping 4922 4923 #ifdef ENABLE_CLASSIC 4924 bd_addr_t addr; 4925 hci_connection_t * conn; 4926 #endif 4927 #ifdef ENABLE_LE_CENTRAL 4928 uint8_t initiator_filter_policy; 4929 #endif 4930 4931 uint16_t opcode = little_endian_read_16(packet, 0); 4932 switch (opcode) { 4933 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4934 hci_stack->loopback_mode = packet[3]; 4935 break; 4936 4937 #ifdef ENABLE_CLASSIC 4938 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4939 reverse_bd_addr(&packet[3], addr); 4940 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4941 4942 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4943 if (!conn) { 4944 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4945 if (!conn) { 4946 // notify client that alloc failed 4947 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4948 return -1; // packet not sent to controller 4949 } 4950 conn->state = SEND_CREATE_CONNECTION; 4951 conn->role = HCI_ROLE_MASTER; 4952 } 4953 log_info("conn state %u", conn->state); 4954 switch (conn->state) { 4955 // if connection active exists 4956 case OPEN: 4957 // and OPEN, emit connection complete command 4958 hci_emit_connection_complete(addr, conn->con_handle, 0); 4959 return -1; // packet not sent to controller 4960 case RECEIVED_DISCONNECTION_COMPLETE: 4961 // create connection triggered in disconnect complete event, let's do it now 4962 break; 4963 case SEND_CREATE_CONNECTION: 4964 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4965 break; 4966 default: 4967 // otherwise, just ignore as it is already in the open process 4968 return -1; // packet not sent to controller 4969 } 4970 conn->state = SENT_CREATE_CONNECTION; 4971 4972 // track outgoing connection 4973 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4974 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4975 break; 4976 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4977 if (hci_stack->link_key_db) { 4978 reverse_bd_addr(&packet[3], addr); 4979 hci_stack->link_key_db->delete_link_key(addr); 4980 } 4981 break; 4982 4983 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 4984 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4985 // setup_synchronous_connection? Voice setting at offset 22 4986 // TODO: compare to current setting if sco connection already active 4987 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4988 break; 4989 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4990 // accept_synchronus_connection? Voice setting at offset 18 4991 // TODO: compare to current setting if sco connection already active 4992 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4993 break; 4994 #endif 4995 #endif 4996 4997 #ifdef ENABLE_BLE 4998 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4999 hci_stack->le_random_address_set = 1; 5000 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5001 break; 5002 #ifdef ENABLE_LE_PERIPHERAL 5003 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5004 hci_stack->le_advertisements_active = packet[3] != 0; 5005 break; 5006 #endif 5007 #ifdef ENABLE_LE_CENTRAL 5008 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5009 // white list used? 5010 initiator_filter_policy = packet[7]; 5011 switch (initiator_filter_policy) { 5012 case 0: 5013 // whitelist not used 5014 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5015 break; 5016 case 1: 5017 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5018 break; 5019 default: 5020 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5021 break; 5022 } 5023 // track outgoing connection 5024 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5025 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5026 break; 5027 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5028 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5029 break; 5030 #endif 5031 #endif 5032 default: 5033 break; 5034 } 5035 5036 hci_stack->num_cmd_packets--; 5037 5038 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5039 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5040 } 5041 5042 // disconnect because of security block 5043 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5044 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5045 if (!connection) return; 5046 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5047 } 5048 5049 5050 // Configure Secure Simple Pairing 5051 5052 #ifdef ENABLE_CLASSIC 5053 5054 // enable will enable SSP during init 5055 void gap_ssp_set_enable(int enable){ 5056 hci_stack->ssp_enable = enable; 5057 } 5058 5059 static int hci_local_ssp_activated(void){ 5060 return gap_ssp_supported() && hci_stack->ssp_enable; 5061 } 5062 5063 // if set, BTstack will respond to io capability request using authentication requirement 5064 void gap_ssp_set_io_capability(int io_capability){ 5065 hci_stack->ssp_io_capability = io_capability; 5066 } 5067 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5068 hci_stack->ssp_authentication_requirement = authentication_requirement; 5069 } 5070 5071 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5072 void gap_ssp_set_auto_accept(int auto_accept){ 5073 hci_stack->ssp_auto_accept = auto_accept; 5074 } 5075 5076 void gap_secure_connections_enable(bool enable){ 5077 hci_stack->secure_connections_enable = enable; 5078 } 5079 5080 #endif 5081 5082 // va_list part of hci_send_cmd 5083 int hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5084 if (!hci_can_send_command_packet_now()){ 5085 log_error("hci_send_cmd called but cannot send packet now"); 5086 return 0; 5087 } 5088 5089 // for HCI INITIALIZATION 5090 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5091 hci_stack->last_cmd_opcode = cmd->opcode; 5092 5093 hci_reserve_packet_buffer(); 5094 uint8_t * packet = hci_stack->hci_packet_buffer; 5095 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5096 int err = hci_send_cmd_packet(packet, size); 5097 5098 // release packet buffer on error or for synchronous transport implementations 5099 if ((err < 0) || hci_transport_synchronous()){ 5100 hci_release_packet_buffer(); 5101 hci_emit_transport_packet_sent(); 5102 } 5103 5104 return err; 5105 } 5106 5107 /** 5108 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5109 */ 5110 int hci_send_cmd(const hci_cmd_t * cmd, ...){ 5111 va_list argptr; 5112 va_start(argptr, cmd); 5113 int res = hci_send_cmd_va_arg(cmd, argptr); 5114 va_end(argptr); 5115 return res; 5116 } 5117 5118 // Create various non-HCI events. 5119 // TODO: generalize, use table similar to hci_create_command 5120 5121 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5122 // dump packet 5123 if (dump) { 5124 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5125 } 5126 5127 // dispatch to all event handlers 5128 btstack_linked_list_iterator_t it; 5129 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5130 while (btstack_linked_list_iterator_has_next(&it)){ 5131 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5132 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5133 } 5134 } 5135 5136 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5137 if (!hci_stack->acl_packet_handler) return; 5138 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5139 } 5140 5141 #ifdef ENABLE_CLASSIC 5142 static void hci_notify_if_sco_can_send_now(void){ 5143 // notify SCO sender if waiting 5144 if (!hci_stack->sco_waiting_for_can_send_now) return; 5145 if (hci_can_send_sco_packet_now()){ 5146 hci_stack->sco_waiting_for_can_send_now = 0; 5147 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5148 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5149 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5150 } 5151 } 5152 5153 // parsing end emitting has been merged to reduce code size 5154 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5155 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5156 5157 uint8_t * eir_data; 5158 ad_context_t context; 5159 const uint8_t * name; 5160 uint8_t name_len; 5161 5162 if (size < 3) return; 5163 5164 int event_type = hci_event_packet_get_type(packet); 5165 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5166 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5167 5168 switch (event_type){ 5169 case HCI_EVENT_INQUIRY_RESULT: 5170 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5171 if (size != (3 + (num_responses * 14))) return; 5172 break; 5173 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5174 if (size != 257) return; 5175 if (num_responses != 1) return; 5176 break; 5177 default: 5178 return; 5179 } 5180 5181 // event[1] is set at the end 5182 int i; 5183 for (i=0; i<num_responses;i++){ 5184 memset(event, 0, sizeof(event)); 5185 event[0] = GAP_EVENT_INQUIRY_RESULT; 5186 uint8_t event_size = 18; // if name is not set by EIR 5187 5188 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5189 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5190 (void)memcpy(&event[9], 5191 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5192 3); // class of device 5193 (void)memcpy(&event[12], 5194 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5195 2); // clock offset 5196 5197 switch (event_type){ 5198 case HCI_EVENT_INQUIRY_RESULT: 5199 // 14,15,16,17 = 0, size 18 5200 break; 5201 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5202 event[14] = 1; 5203 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5204 // 16,17 = 0, size 18 5205 break; 5206 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5207 event[14] = 1; 5208 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5209 // EIR packets only contain a single inquiry response 5210 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5211 name = NULL; 5212 // Iterate over EIR data 5213 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5214 uint8_t data_type = ad_iterator_get_data_type(&context); 5215 uint8_t data_size = ad_iterator_get_data_len(&context); 5216 const uint8_t * data = ad_iterator_get_data(&context); 5217 // Prefer Complete Local Name over Shortened Local Name 5218 switch (data_type){ 5219 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5220 if (name) continue; 5221 /* fall through */ 5222 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5223 name = data; 5224 name_len = data_size; 5225 break; 5226 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5227 if (data_size != 8) break; 5228 event[16] = 1; 5229 memcpy(&event[17], data, 8); 5230 break; 5231 default: 5232 break; 5233 } 5234 } 5235 if (name){ 5236 event[25] = 1; 5237 // truncate name if needed 5238 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5239 event[26] = len; 5240 (void)memcpy(&event[27], name, len); 5241 event_size += len; 5242 } 5243 break; 5244 default: 5245 return; 5246 } 5247 event[1] = event_size - 2; 5248 hci_emit_event(event, event_size, 1); 5249 } 5250 } 5251 #endif 5252 5253 void hci_emit_state(void){ 5254 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5255 uint8_t event[3]; 5256 event[0] = BTSTACK_EVENT_STATE; 5257 event[1] = sizeof(event) - 2u; 5258 event[2] = hci_stack->state; 5259 hci_emit_event(event, sizeof(event), 1); 5260 } 5261 5262 #ifdef ENABLE_CLASSIC 5263 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5264 uint8_t event[13]; 5265 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5266 event[1] = sizeof(event) - 2; 5267 event[2] = status; 5268 little_endian_store_16(event, 3, con_handle); 5269 reverse_bd_addr(address, &event[5]); 5270 event[11] = 1; // ACL connection 5271 event[12] = 0; // encryption disabled 5272 hci_emit_event(event, sizeof(event), 1); 5273 } 5274 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5275 if (disable_l2cap_timeouts) return; 5276 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5277 uint8_t event[4]; 5278 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5279 event[1] = sizeof(event) - 2; 5280 little_endian_store_16(event, 2, conn->con_handle); 5281 hci_emit_event(event, sizeof(event), 1); 5282 } 5283 #endif 5284 5285 #ifdef ENABLE_BLE 5286 #ifdef ENABLE_LE_CENTRAL 5287 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){ 5288 uint8_t event[21]; 5289 event[0] = HCI_EVENT_LE_META; 5290 event[1] = sizeof(event) - 2u; 5291 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5292 event[3] = status; 5293 little_endian_store_16(event, 4, con_handle); 5294 event[6] = 0; // TODO: role 5295 event[7] = address_type; 5296 reverse_bd_addr(address, &event[8]); 5297 little_endian_store_16(event, 14, 0); // interval 5298 little_endian_store_16(event, 16, 0); // latency 5299 little_endian_store_16(event, 18, 0); // supervision timeout 5300 event[20] = 0; // master clock accuracy 5301 hci_emit_event(event, sizeof(event), 1); 5302 } 5303 #endif 5304 #endif 5305 5306 static void hci_emit_transport_packet_sent(void){ 5307 // notify upper stack that it might be possible to send again 5308 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5309 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5310 } 5311 5312 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5313 uint8_t event[6]; 5314 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5315 event[1] = sizeof(event) - 2u; 5316 event[2] = 0; // status = OK 5317 little_endian_store_16(event, 3, con_handle); 5318 event[5] = reason; 5319 hci_emit_event(event, sizeof(event), 1); 5320 } 5321 5322 static void hci_emit_nr_connections_changed(void){ 5323 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5324 uint8_t event[3]; 5325 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5326 event[1] = sizeof(event) - 2u; 5327 event[2] = nr_hci_connections(); 5328 hci_emit_event(event, sizeof(event), 1); 5329 } 5330 5331 static void hci_emit_hci_open_failed(void){ 5332 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5333 uint8_t event[2]; 5334 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5335 event[1] = sizeof(event) - 2u; 5336 hci_emit_event(event, sizeof(event), 1); 5337 } 5338 5339 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5340 log_info("hci_emit_dedicated_bonding_result %u ", status); 5341 uint8_t event[9]; 5342 int pos = 0; 5343 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5344 event[pos++] = sizeof(event) - 2u; 5345 event[pos++] = status; 5346 reverse_bd_addr(address, &event[pos]); 5347 hci_emit_event(event, sizeof(event), 1); 5348 } 5349 5350 5351 #ifdef ENABLE_CLASSIC 5352 5353 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5354 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5355 uint8_t event[5]; 5356 int pos = 0; 5357 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5358 event[pos++] = sizeof(event) - 2; 5359 little_endian_store_16(event, 2, con_handle); 5360 pos += 2; 5361 event[pos++] = level; 5362 hci_emit_event(event, sizeof(event), 1); 5363 } 5364 5365 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5366 if (!connection) return LEVEL_0; 5367 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5368 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5369 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5370 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5371 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5372 // LEVEL 4 always requires 128 bit encrytion key size 5373 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5374 security_level = LEVEL_3; 5375 } 5376 return security_level; 5377 } 5378 5379 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5380 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5381 uint8_t event[3]; 5382 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5383 event[1] = sizeof(event) - 2; 5384 event[2] = enabled; 5385 hci_emit_event(event, sizeof(event), 1); 5386 } 5387 5388 // query if remote side supports eSCO 5389 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5390 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5391 if (!connection) return 0; 5392 return (connection->remote_supported_features[0] & 1) != 0; 5393 } 5394 5395 static bool hci_ssp_supported(hci_connection_t * connection){ 5396 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5397 return (connection->bonding_flags & mask) == mask; 5398 } 5399 5400 // query if remote side supports SSP 5401 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5402 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5403 if (!connection) return 0; 5404 return hci_ssp_supported(connection) ? 1 : 0; 5405 } 5406 5407 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5408 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5409 } 5410 5411 // GAP API 5412 /** 5413 * @bbrief enable/disable bonding. default is enabled 5414 * @praram enabled 5415 */ 5416 void gap_set_bondable_mode(int enable){ 5417 hci_stack->bondable = enable ? 1 : 0; 5418 } 5419 /** 5420 * @brief Get bondable mode. 5421 * @return 1 if bondable 5422 */ 5423 int gap_get_bondable_mode(void){ 5424 return hci_stack->bondable; 5425 } 5426 5427 /** 5428 * @brief map link keys to security levels 5429 */ 5430 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5431 switch (link_key_type){ 5432 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5433 return LEVEL_4; 5434 case COMBINATION_KEY: 5435 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5436 return LEVEL_3; 5437 default: 5438 return LEVEL_2; 5439 } 5440 } 5441 5442 /** 5443 * @brief map link keys to secure connection yes/no 5444 */ 5445 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5446 switch (link_key_type){ 5447 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5448 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5449 return 1; 5450 default: 5451 return 0; 5452 } 5453 } 5454 5455 /** 5456 * @brief map link keys to authenticated 5457 */ 5458 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5459 switch (link_key_type){ 5460 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5461 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5462 return 1; 5463 default: 5464 return 0; 5465 } 5466 } 5467 5468 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5469 log_info("gap_mitm_protection_required_for_security_level %u", level); 5470 return level > LEVEL_2; 5471 } 5472 5473 /** 5474 * @brief get current security level 5475 */ 5476 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5477 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5478 if (!connection) return LEVEL_0; 5479 return gap_security_level_for_connection(connection); 5480 } 5481 5482 /** 5483 * @brief request connection to device to 5484 * @result GAP_AUTHENTICATION_RESULT 5485 */ 5486 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5487 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5488 if (!connection){ 5489 hci_emit_security_level(con_handle, LEVEL_0); 5490 return; 5491 } 5492 5493 btstack_assert(hci_is_le_connection(connection) == false); 5494 5495 gap_security_level_t current_level = gap_security_level(con_handle); 5496 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5497 requested_level, connection->requested_security_level, current_level); 5498 5499 // authentication active if authentication request was sent or planned level > 0 5500 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5501 if (authentication_active){ 5502 // authentication already active 5503 if (connection->requested_security_level < requested_level){ 5504 // increase requested level as new level is higher 5505 // TODO: handle re-authentication when done 5506 connection->requested_security_level = requested_level; 5507 } 5508 } else { 5509 // no request active, notify if security sufficient 5510 if (requested_level <= current_level){ 5511 hci_emit_security_level(con_handle, current_level); 5512 return; 5513 } 5514 5515 // store request 5516 connection->requested_security_level = requested_level; 5517 5518 // start to authenticate connection 5519 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5520 hci_run(); 5521 } 5522 } 5523 5524 /** 5525 * @brief start dedicated bonding with device. disconnect after bonding 5526 * @param device 5527 * @param request MITM protection 5528 * @result GAP_DEDICATED_BONDING_COMPLETE 5529 */ 5530 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5531 5532 // create connection state machine 5533 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5534 5535 if (!connection){ 5536 return BTSTACK_MEMORY_ALLOC_FAILED; 5537 } 5538 5539 // delete linkn key 5540 gap_drop_link_key_for_bd_addr(device); 5541 5542 // configure LEVEL_2/3, dedicated bonding 5543 connection->state = SEND_CREATE_CONNECTION; 5544 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5545 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5546 connection->bonding_flags = BONDING_DEDICATED; 5547 5548 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5549 5550 // handle: connnection failure (connection complete != ok) 5551 // handle: authentication failure 5552 // handle: disconnect on done 5553 5554 hci_run(); 5555 5556 return 0; 5557 } 5558 #endif 5559 5560 void gap_set_local_name(const char * local_name){ 5561 hci_stack->local_name = local_name; 5562 } 5563 5564 5565 #ifdef ENABLE_BLE 5566 5567 #ifdef ENABLE_LE_CENTRAL 5568 void gap_start_scan(void){ 5569 hci_stack->le_scanning_enabled = true; 5570 hci_run(); 5571 } 5572 5573 void gap_stop_scan(void){ 5574 hci_stack->le_scanning_enabled = false; 5575 hci_run(); 5576 } 5577 5578 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5579 hci_stack->le_scan_type = scan_type; 5580 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5581 hci_stack->le_scan_interval = scan_interval; 5582 hci_stack->le_scan_window = scan_window; 5583 hci_stack->le_scanning_param_update = true; 5584 hci_run(); 5585 } 5586 5587 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5588 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5589 } 5590 5591 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5592 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5593 if (!conn){ 5594 // disallow if le connection is already outgoing 5595 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5596 log_error("le connection already active"); 5597 return ERROR_CODE_COMMAND_DISALLOWED; 5598 } 5599 5600 log_info("gap_connect: no connection exists yet, creating context"); 5601 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5602 if (!conn){ 5603 // notify client that alloc failed 5604 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5605 log_info("gap_connect: failed to alloc hci_connection_t"); 5606 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5607 } 5608 5609 // set le connecting state 5610 if (hci_is_le_connection_type(addr_type)){ 5611 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5612 } 5613 5614 conn->state = SEND_CREATE_CONNECTION; 5615 log_info("gap_connect: send create connection next"); 5616 hci_run(); 5617 return ERROR_CODE_SUCCESS; 5618 } 5619 5620 if (!hci_is_le_connection(conn) || 5621 (conn->state == SEND_CREATE_CONNECTION) || 5622 (conn->state == SENT_CREATE_CONNECTION)) { 5623 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5624 log_error("gap_connect: classic connection or connect is already being created"); 5625 return GATT_CLIENT_IN_WRONG_STATE; 5626 } 5627 5628 // check if connection was just disconnected 5629 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5630 log_info("gap_connect: send create connection (again)"); 5631 conn->state = SEND_CREATE_CONNECTION; 5632 hci_run(); 5633 return ERROR_CODE_SUCCESS; 5634 } 5635 5636 log_info("gap_connect: context exists with state %u", conn->state); 5637 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5638 hci_run(); 5639 return ERROR_CODE_SUCCESS; 5640 } 5641 5642 // @assumption: only a single outgoing LE Connection exists 5643 static hci_connection_t * gap_get_outgoing_connection(void){ 5644 btstack_linked_item_t *it; 5645 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5646 hci_connection_t * conn = (hci_connection_t *) it; 5647 if (!hci_is_le_connection(conn)) continue; 5648 switch (conn->state){ 5649 case SEND_CREATE_CONNECTION: 5650 case SENT_CREATE_CONNECTION: 5651 case SENT_CANCEL_CONNECTION: 5652 return conn; 5653 default: 5654 break; 5655 }; 5656 } 5657 return NULL; 5658 } 5659 5660 uint8_t gap_connect_cancel(void){ 5661 hci_connection_t * conn = gap_get_outgoing_connection(); 5662 if (!conn) return 0; 5663 switch (conn->state){ 5664 case SEND_CREATE_CONNECTION: 5665 // skip sending create connection and emit event instead 5666 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5667 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5668 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5669 btstack_memory_hci_connection_free( conn ); 5670 break; 5671 case SENT_CREATE_CONNECTION: 5672 // request to send cancel connection 5673 conn->state = SEND_CANCEL_CONNECTION; 5674 hci_run(); 5675 break; 5676 default: 5677 break; 5678 } 5679 return 0; 5680 } 5681 #endif 5682 5683 #ifdef ENABLE_LE_CENTRAL 5684 /** 5685 * @brief Set connection parameters for outgoing connections 5686 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5687 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5688 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5689 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5690 * @param conn_latency, default: 4 5691 * @param supervision_timeout (unit: 10ms), default: 720 ms 5692 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5693 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5694 */ 5695 5696 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5697 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5698 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5699 hci_stack->le_connection_scan_interval = conn_scan_interval; 5700 hci_stack->le_connection_scan_window = conn_scan_window; 5701 hci_stack->le_connection_interval_min = conn_interval_min; 5702 hci_stack->le_connection_interval_max = conn_interval_max; 5703 hci_stack->le_connection_latency = conn_latency; 5704 hci_stack->le_supervision_timeout = supervision_timeout; 5705 hci_stack->le_minimum_ce_length = min_ce_length; 5706 hci_stack->le_maximum_ce_length = max_ce_length; 5707 } 5708 #endif 5709 5710 /** 5711 * @brief Updates the connection parameters for a given LE connection 5712 * @param handle 5713 * @param conn_interval_min (unit: 1.25ms) 5714 * @param conn_interval_max (unit: 1.25ms) 5715 * @param conn_latency 5716 * @param supervision_timeout (unit: 10ms) 5717 * @returns 0 if ok 5718 */ 5719 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5720 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5721 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5722 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5723 connection->le_conn_interval_min = conn_interval_min; 5724 connection->le_conn_interval_max = conn_interval_max; 5725 connection->le_conn_latency = conn_latency; 5726 connection->le_supervision_timeout = supervision_timeout; 5727 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5728 hci_run(); 5729 return 0; 5730 } 5731 5732 /** 5733 * @brief Request an update of the connection parameter for a given LE connection 5734 * @param handle 5735 * @param conn_interval_min (unit: 1.25ms) 5736 * @param conn_interval_max (unit: 1.25ms) 5737 * @param conn_latency 5738 * @param supervision_timeout (unit: 10ms) 5739 * @returns 0 if ok 5740 */ 5741 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5742 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5743 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5744 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5745 connection->le_conn_interval_min = conn_interval_min; 5746 connection->le_conn_interval_max = conn_interval_max; 5747 connection->le_conn_latency = conn_latency; 5748 connection->le_supervision_timeout = supervision_timeout; 5749 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5750 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5751 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5752 return 0; 5753 } 5754 5755 #ifdef ENABLE_LE_PERIPHERAL 5756 5757 /** 5758 * @brief Set Advertisement Data 5759 * @param advertising_data_length 5760 * @param advertising_data (max 31 octets) 5761 * @note data is not copied, pointer has to stay valid 5762 */ 5763 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5764 hci_stack->le_advertisements_data_len = advertising_data_length; 5765 hci_stack->le_advertisements_data = advertising_data; 5766 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5767 hci_run(); 5768 } 5769 5770 /** 5771 * @brief Set Scan Response Data 5772 * @param advertising_data_length 5773 * @param advertising_data (max 31 octets) 5774 * @note data is not copied, pointer has to stay valid 5775 */ 5776 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5777 hci_stack->le_scan_response_data_len = scan_response_data_length; 5778 hci_stack->le_scan_response_data = scan_response_data; 5779 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5780 hci_run(); 5781 } 5782 5783 /** 5784 * @brief Set Advertisement Parameters 5785 * @param adv_int_min 5786 * @param adv_int_max 5787 * @param adv_type 5788 * @param direct_address_type 5789 * @param direct_address 5790 * @param channel_map 5791 * @param filter_policy 5792 * 5793 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5794 */ 5795 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5796 uint8_t direct_address_typ, bd_addr_t direct_address, 5797 uint8_t channel_map, uint8_t filter_policy) { 5798 5799 hci_stack->le_advertisements_interval_min = adv_int_min; 5800 hci_stack->le_advertisements_interval_max = adv_int_max; 5801 hci_stack->le_advertisements_type = adv_type; 5802 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5803 hci_stack->le_advertisements_channel_map = channel_map; 5804 hci_stack->le_advertisements_filter_policy = filter_policy; 5805 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5806 6); 5807 5808 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 5809 hci_run(); 5810 } 5811 5812 /** 5813 * @brief Enable/Disable Advertisements 5814 * @param enabled 5815 */ 5816 void gap_advertisements_enable(int enabled){ 5817 hci_stack->le_advertisements_enabled = enabled != 0; 5818 hci_update_advertisements_enabled_for_current_roles(); 5819 hci_run(); 5820 } 5821 5822 #endif 5823 5824 void hci_le_set_own_address_type(uint8_t own_address_type){ 5825 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5826 if (own_address_type == hci_stack->le_own_addr_type) return; 5827 hci_stack->le_own_addr_type = own_address_type; 5828 5829 #ifdef ENABLE_LE_PERIPHERAL 5830 // update advertisement parameters, too 5831 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5832 hci_run(); 5833 #endif 5834 #ifdef ENABLE_LE_CENTRAL 5835 // note: we don't update scan parameters or modify ongoing connection attempts 5836 #endif 5837 } 5838 5839 #endif 5840 5841 uint8_t gap_disconnect(hci_con_handle_t handle){ 5842 hci_connection_t * conn = hci_connection_for_handle(handle); 5843 if (!conn){ 5844 hci_emit_disconnection_complete(handle, 0); 5845 return 0; 5846 } 5847 // ignore if already disconnected 5848 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5849 return 0; 5850 } 5851 conn->state = SEND_DISCONNECT; 5852 hci_run(); 5853 return 0; 5854 } 5855 5856 int gap_read_rssi(hci_con_handle_t con_handle){ 5857 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5858 if (hci_connection == NULL) return 0; 5859 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 5860 hci_run(); 5861 return 1; 5862 } 5863 5864 /** 5865 * @brief Get connection type 5866 * @param con_handle 5867 * @result connection_type 5868 */ 5869 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5870 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5871 if (!conn) return GAP_CONNECTION_INVALID; 5872 switch (conn->address_type){ 5873 case BD_ADDR_TYPE_LE_PUBLIC: 5874 case BD_ADDR_TYPE_LE_RANDOM: 5875 return GAP_CONNECTION_LE; 5876 case BD_ADDR_TYPE_SCO: 5877 return GAP_CONNECTION_SCO; 5878 case BD_ADDR_TYPE_ACL: 5879 return GAP_CONNECTION_ACL; 5880 default: 5881 return GAP_CONNECTION_INVALID; 5882 } 5883 } 5884 5885 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5886 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5887 if (!conn) return HCI_ROLE_INVALID; 5888 return (hci_role_t) conn->role; 5889 } 5890 5891 5892 #ifdef ENABLE_CLASSIC 5893 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5894 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5895 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5896 conn->request_role = role; 5897 hci_run(); 5898 return ERROR_CODE_SUCCESS; 5899 } 5900 #endif 5901 5902 #ifdef ENABLE_BLE 5903 5904 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){ 5905 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5906 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5907 5908 conn->le_phy_update_all_phys = all_phys; 5909 conn->le_phy_update_tx_phys = tx_phys; 5910 conn->le_phy_update_rx_phys = rx_phys; 5911 conn->le_phy_update_phy_options = phy_options; 5912 5913 hci_run(); 5914 5915 return 0; 5916 } 5917 5918 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5919 // check if already in list 5920 btstack_linked_list_iterator_t it; 5921 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5922 while (btstack_linked_list_iterator_has_next(&it)) { 5923 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5924 if (entry->address_type != address_type) { 5925 continue; 5926 } 5927 if (memcmp(entry->address, address, 6) != 0) { 5928 continue; 5929 } 5930 // disallow if already scheduled to add 5931 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5932 return ERROR_CODE_COMMAND_DISALLOWED; 5933 } 5934 // still on controller, but scheduled to remove -> re-add 5935 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5936 return ERROR_CODE_SUCCESS; 5937 } 5938 // alloc and add to list 5939 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5940 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5941 entry->address_type = address_type; 5942 (void)memcpy(entry->address, address, 6); 5943 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5944 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5945 return ERROR_CODE_SUCCESS; 5946 } 5947 5948 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5949 btstack_linked_list_iterator_t it; 5950 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5951 while (btstack_linked_list_iterator_has_next(&it)){ 5952 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5953 if (entry->address_type != address_type) { 5954 continue; 5955 } 5956 if (memcmp(entry->address, address, 6) != 0) { 5957 continue; 5958 } 5959 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5960 // remove from controller if already present 5961 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5962 } else { 5963 // directly remove entry from whitelist 5964 btstack_linked_list_iterator_remove(&it); 5965 btstack_memory_whitelist_entry_free(entry); 5966 } 5967 return ERROR_CODE_SUCCESS; 5968 } 5969 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5970 } 5971 5972 static void hci_whitelist_clear(void){ 5973 btstack_linked_list_iterator_t it; 5974 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5975 while (btstack_linked_list_iterator_has_next(&it)){ 5976 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5977 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5978 // remove from controller if already present 5979 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5980 continue; 5981 } 5982 // directly remove entry from whitelist 5983 btstack_linked_list_iterator_remove(&it); 5984 btstack_memory_whitelist_entry_free(entry); 5985 } 5986 } 5987 5988 /** 5989 * @brief Clear Whitelist 5990 * @returns 0 if ok 5991 */ 5992 uint8_t gap_whitelist_clear(void){ 5993 hci_whitelist_clear(); 5994 hci_run(); 5995 return ERROR_CODE_SUCCESS; 5996 } 5997 5998 /** 5999 * @brief Add Device to Whitelist 6000 * @param address_typ 6001 * @param address 6002 * @returns 0 if ok 6003 */ 6004 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6005 uint8_t status = hci_whitelist_add(address_type, address); 6006 if (status){ 6007 return status; 6008 } 6009 hci_run(); 6010 return ERROR_CODE_SUCCESS; 6011 } 6012 6013 /** 6014 * @brief Remove Device from Whitelist 6015 * @param address_typ 6016 * @param address 6017 * @returns 0 if ok 6018 */ 6019 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6020 uint8_t status = hci_whitelist_remove(address_type, address); 6021 if (status){ 6022 return status; 6023 } 6024 hci_run(); 6025 return ERROR_CODE_SUCCESS; 6026 } 6027 6028 #ifdef ENABLE_LE_CENTRAL 6029 /** 6030 * @brief Connect with Whitelist 6031 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6032 * @returns - if ok 6033 */ 6034 uint8_t gap_connect_with_whitelist(void){ 6035 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6036 return ERROR_CODE_COMMAND_DISALLOWED; 6037 } 6038 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6039 hci_run(); 6040 return ERROR_CODE_SUCCESS; 6041 } 6042 6043 /** 6044 * @brief Auto Connection Establishment - Start Connecting to device 6045 * @param address_typ 6046 * @param address 6047 * @returns 0 if ok 6048 */ 6049 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6050 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6051 return ERROR_CODE_COMMAND_DISALLOWED; 6052 } 6053 6054 uint8_t status = hci_whitelist_add(address_type, address); 6055 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6056 return status; 6057 } 6058 6059 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6060 6061 hci_run(); 6062 return ERROR_CODE_SUCCESS; 6063 } 6064 6065 /** 6066 * @brief Auto Connection Establishment - Stop Connecting to device 6067 * @param address_typ 6068 * @param address 6069 * @returns 0 if ok 6070 */ 6071 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6072 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6073 return ERROR_CODE_COMMAND_DISALLOWED; 6074 } 6075 6076 hci_whitelist_remove(address_type, address); 6077 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6078 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6079 } 6080 hci_run(); 6081 return 0; 6082 } 6083 6084 /** 6085 * @brief Auto Connection Establishment - Stop everything 6086 * @note Convenience function to stop all active auto connection attempts 6087 */ 6088 uint8_t gap_auto_connection_stop_all(void){ 6089 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6090 return ERROR_CODE_COMMAND_DISALLOWED; 6091 } 6092 hci_whitelist_clear(); 6093 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6094 hci_run(); 6095 return ERROR_CODE_SUCCESS; 6096 } 6097 6098 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6099 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6100 if (!conn) return 0; 6101 return conn->le_connection_interval; 6102 } 6103 #endif 6104 #endif 6105 6106 #ifdef ENABLE_CLASSIC 6107 /** 6108 * @brief Set Extended Inquiry Response data 6109 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6110 * @note has to be done before stack starts up 6111 */ 6112 void gap_set_extended_inquiry_response(const uint8_t * data){ 6113 hci_stack->eir_data = data; 6114 } 6115 6116 /** 6117 * @brief Start GAP Classic Inquiry 6118 * @param duration in 1.28s units 6119 * @return 0 if ok 6120 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6121 */ 6122 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6123 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6124 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6125 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6126 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6127 } 6128 hci_stack->inquiry_state = duration_in_1280ms_units; 6129 hci_run(); 6130 return 0; 6131 } 6132 6133 /** 6134 * @brief Stop GAP Classic Inquiry 6135 * @returns 0 if ok 6136 */ 6137 int gap_inquiry_stop(void){ 6138 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6139 // emit inquiry complete event, before it even started 6140 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6141 hci_emit_event(event, sizeof(event), 1); 6142 return 0; 6143 } 6144 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6145 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6146 hci_run(); 6147 return 0; 6148 } 6149 6150 void gap_inquiry_set_lap(uint32_t lap){ 6151 hci_stack->inquiry_lap = lap; 6152 } 6153 6154 6155 /** 6156 * @brief Remote Name Request 6157 * @param addr 6158 * @param page_scan_repetition_mode 6159 * @param clock_offset only used when bit 15 is set 6160 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6161 */ 6162 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6163 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6164 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6165 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6166 hci_stack->remote_name_clock_offset = clock_offset; 6167 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6168 hci_run(); 6169 return 0; 6170 } 6171 6172 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6173 hci_stack->gap_pairing_state = state; 6174 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6175 hci_run(); 6176 return 0; 6177 } 6178 6179 /** 6180 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6181 * @param addr 6182 * @param pin_data 6183 * @param pin_len 6184 * @return 0 if ok 6185 */ 6186 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6187 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6188 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6189 hci_stack->gap_pairing_pin_len = pin_len; 6190 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6191 } 6192 6193 /** 6194 * @brief Legacy Pairing Pin Code Response 6195 * @param addr 6196 * @param pin 6197 * @return 0 if ok 6198 */ 6199 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6200 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6201 } 6202 6203 /** 6204 * @brief Abort Legacy Pairing 6205 * @param addr 6206 * @param pin 6207 * @return 0 if ok 6208 */ 6209 int gap_pin_code_negative(bd_addr_t addr){ 6210 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6211 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6212 } 6213 6214 /** 6215 * @brief SSP Passkey Response 6216 * @param addr 6217 * @param passkey 6218 * @return 0 if ok 6219 */ 6220 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6221 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6222 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6223 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6224 } 6225 6226 /** 6227 * @brief Abort SSP Passkey Entry/Pairing 6228 * @param addr 6229 * @param pin 6230 * @return 0 if ok 6231 */ 6232 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6233 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6234 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6235 } 6236 6237 /** 6238 * @brief Accept SSP Numeric Comparison 6239 * @param addr 6240 * @param passkey 6241 * @return 0 if ok 6242 */ 6243 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6244 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6245 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6246 } 6247 6248 /** 6249 * @brief Abort SSP Numeric Comparison/Pairing 6250 * @param addr 6251 * @param pin 6252 * @return 0 if ok 6253 */ 6254 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6255 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6256 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6257 } 6258 6259 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6260 6261 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6262 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6263 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6264 connectionSetAuthenticationFlags(conn, flag); 6265 hci_run(); 6266 return ERROR_CODE_SUCCESS; 6267 } 6268 6269 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6270 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_REPLY); 6271 } 6272 6273 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6274 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6275 } 6276 #endif 6277 6278 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6279 /** 6280 * @brief Report Remote OOB Data 6281 * @param bd_addr 6282 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6283 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6284 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6285 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6286 */ 6287 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){ 6288 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6289 if (connection == NULL) { 6290 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6291 } 6292 connection->classic_oob_c_192 = c_192; 6293 connection->classic_oob_r_192 = r_192; 6294 connection->classic_oob_c_256 = c_256; 6295 connection->classic_oob_r_256 = r_256; 6296 return ERROR_CODE_SUCCESS; 6297 } 6298 /** 6299 * @brief Generate new OOB data 6300 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6301 */ 6302 void gap_ssp_generate_oob_data(void){ 6303 hci_stack->classic_read_local_oob_data = true; 6304 hci_run(); 6305 } 6306 6307 #endif 6308 6309 /** 6310 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6311 * @param inquiry_mode see bluetooth_defines.h 6312 */ 6313 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6314 hci_stack->inquiry_mode = inquiry_mode; 6315 } 6316 6317 /** 6318 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6319 */ 6320 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6321 hci_stack->sco_voice_setting = voice_setting; 6322 } 6323 6324 /** 6325 * @brief Get SCO Voice Setting 6326 * @return current voice setting 6327 */ 6328 uint16_t hci_get_sco_voice_setting(void){ 6329 return hci_stack->sco_voice_setting; 6330 } 6331 6332 static int hci_have_usb_transport(void){ 6333 if (!hci_stack->hci_transport) return 0; 6334 const char * transport_name = hci_stack->hci_transport->name; 6335 if (!transport_name) return 0; 6336 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6337 } 6338 6339 /** @brief Get SCO packet length for current SCO Voice setting 6340 * @note Using SCO packets of the exact length is required for USB transfer 6341 * @return Length of SCO packets in bytes (not audio frames) 6342 */ 6343 int hci_get_sco_packet_length(void){ 6344 int sco_packet_length = 0; 6345 6346 #ifdef ENABLE_SCO_OVER_HCI 6347 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6348 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6349 6350 if (hci_have_usb_transport()){ 6351 // see Core Spec for H2 USB Transfer. 6352 // 3 byte SCO header + 24 bytes per connection 6353 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6354 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6355 } else { 6356 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6357 sco_packet_length = 3 + 60 * multiplier; 6358 // assert that it still fits inside an SCO buffer 6359 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6360 sco_packet_length = 3 + 60; 6361 } 6362 } 6363 #endif 6364 6365 #ifdef HAVE_SCO_TRANSPORT 6366 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6367 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6368 sco_packet_length = 3 + 60 * multiplier; 6369 #endif 6370 return sco_packet_length; 6371 } 6372 6373 /** 6374 * @brief Sets the master/slave policy 6375 * @param policy (0: attempt to become master, 1: let connecting device decide) 6376 */ 6377 void hci_set_master_slave_policy(uint8_t policy){ 6378 hci_stack->master_slave_policy = policy; 6379 } 6380 6381 #endif 6382 6383 HCI_STATE hci_get_state(void){ 6384 return hci_stack->state; 6385 } 6386 6387 #ifdef ENABLE_CLASSIC 6388 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6389 hci_stack->gap_classic_accept_callback = accept_callback; 6390 } 6391 #endif 6392 6393 /** 6394 * @brief Set callback for Bluetooth Hardware Error 6395 */ 6396 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6397 hci_stack->hardware_error_callback = fn; 6398 } 6399 6400 void hci_disconnect_all(void){ 6401 btstack_linked_list_iterator_t it; 6402 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6403 while (btstack_linked_list_iterator_has_next(&it)){ 6404 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6405 if (con->state == SENT_DISCONNECT) continue; 6406 con->state = SEND_DISCONNECT; 6407 } 6408 hci_run(); 6409 } 6410 6411 uint16_t hci_get_manufacturer(void){ 6412 return hci_stack->manufacturer; 6413 } 6414 6415 #ifdef ENABLE_BLE 6416 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6417 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6418 if (!hci_con) return NULL; 6419 return &hci_con->sm_connection; 6420 } 6421 6422 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6423 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6424 #endif 6425 6426 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6427 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6428 if (hci_connection == NULL) return 0; 6429 if (hci_is_le_connection(hci_connection)){ 6430 #ifdef ENABLE_BLE 6431 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6432 if (sm_conn->sm_connection_encrypted) { 6433 return sm_conn->sm_actual_encryption_key_size; 6434 } 6435 #endif 6436 } else { 6437 #ifdef ENABLE_CLASSIC 6438 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6439 return hci_connection->encryption_key_size; 6440 } 6441 #endif 6442 } 6443 return 0; 6444 } 6445 6446 int gap_authenticated(hci_con_handle_t con_handle){ 6447 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6448 if (hci_connection == NULL) return 0; 6449 6450 switch (hci_connection->address_type){ 6451 #ifdef ENABLE_BLE 6452 case BD_ADDR_TYPE_LE_PUBLIC: 6453 case BD_ADDR_TYPE_LE_RANDOM: 6454 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6455 return hci_connection->sm_connection.sm_connection_authenticated; 6456 #endif 6457 #ifdef ENABLE_CLASSIC 6458 case BD_ADDR_TYPE_SCO: 6459 case BD_ADDR_TYPE_ACL: 6460 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6461 #endif 6462 default: 6463 return 0; 6464 } 6465 } 6466 6467 int gap_secure_connection(hci_con_handle_t con_handle){ 6468 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6469 if (hci_connection == NULL) return 0; 6470 6471 switch (hci_connection->address_type){ 6472 #ifdef ENABLE_BLE 6473 case BD_ADDR_TYPE_LE_PUBLIC: 6474 case BD_ADDR_TYPE_LE_RANDOM: 6475 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6476 return hci_connection->sm_connection.sm_connection_sc; 6477 #endif 6478 #ifdef ENABLE_CLASSIC 6479 case BD_ADDR_TYPE_SCO: 6480 case BD_ADDR_TYPE_ACL: 6481 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6482 #endif 6483 default: 6484 return 0; 6485 } 6486 } 6487 6488 bool gap_bonded(hci_con_handle_t con_handle){ 6489 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6490 if (hci_connection == NULL) return 0; 6491 6492 #ifdef ENABLE_CLASSIC 6493 link_key_t link_key; 6494 link_key_type_t link_key_type; 6495 #endif 6496 switch (hci_connection->address_type){ 6497 #ifdef ENABLE_BLE 6498 case BD_ADDR_TYPE_LE_PUBLIC: 6499 case BD_ADDR_TYPE_LE_RANDOM: 6500 return hci_connection->sm_connection.sm_le_db_index >= 0; 6501 #endif 6502 #ifdef ENABLE_CLASSIC 6503 case BD_ADDR_TYPE_SCO: 6504 case BD_ADDR_TYPE_ACL: 6505 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6506 #endif 6507 default: 6508 return false; 6509 } 6510 } 6511 6512 #ifdef ENABLE_BLE 6513 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6514 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6515 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6516 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6517 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6518 return sm_conn->sm_connection_authorization_state; 6519 } 6520 #endif 6521 6522 #ifdef ENABLE_CLASSIC 6523 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){ 6524 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6525 if (!conn) return GAP_CONNECTION_INVALID; 6526 conn->sniff_min_interval = sniff_min_interval; 6527 conn->sniff_max_interval = sniff_max_interval; 6528 conn->sniff_attempt = sniff_attempt; 6529 conn->sniff_timeout = sniff_timeout; 6530 hci_run(); 6531 return 0; 6532 } 6533 6534 /** 6535 * @brief Exit Sniff mode 6536 * @param con_handle 6537 @ @return 0 if ok 6538 */ 6539 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6540 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6541 if (!conn) return GAP_CONNECTION_INVALID; 6542 conn->sniff_min_interval = 0xffff; 6543 hci_run(); 6544 return 0; 6545 } 6546 6547 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){ 6548 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6549 if (!conn) return GAP_CONNECTION_INVALID; 6550 conn->sniff_subrating_max_latency = max_latency; 6551 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6552 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6553 hci_run(); 6554 return ERROR_CODE_SUCCESS; 6555 } 6556 6557 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){ 6558 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6559 if (!conn) return GAP_CONNECTION_INVALID; 6560 conn->qos_service_type = service_type; 6561 conn->qos_token_rate = token_rate; 6562 conn->qos_peak_bandwidth = peak_bandwidth; 6563 conn->qos_latency = latency; 6564 conn->qos_delay_variation = delay_variation; 6565 hci_run(); 6566 return ERROR_CODE_SUCCESS; 6567 } 6568 6569 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6570 hci_stack->new_page_scan_interval = page_scan_interval; 6571 hci_stack->new_page_scan_window = page_scan_window; 6572 hci_run(); 6573 } 6574 6575 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6576 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6577 hci_run(); 6578 } 6579 6580 #endif 6581 6582 void hci_halting_defer(void){ 6583 if (hci_stack->state != HCI_STATE_HALTING) return; 6584 switch (hci_stack->substate){ 6585 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6586 case HCI_HALTING_CLOSE: 6587 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6588 break; 6589 default: 6590 break; 6591 } 6592 } 6593 6594 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6595 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6596 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6597 if (le_device_db_index >= le_device_db_max_count()) return; 6598 uint8_t offset = le_device_db_index >> 3; 6599 uint8_t mask = 1 << (le_device_db_index & 7); 6600 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6601 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6602 // note: go back to remove entries, otherwise, a remove + add will skip the add 6603 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6604 } 6605 } 6606 6607 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6608 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6609 if (le_device_db_index >= le_device_db_max_count()) return; 6610 uint8_t offset = le_device_db_index >> 3; 6611 uint8_t mask = 1 << (le_device_db_index & 7); 6612 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6613 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6614 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6615 } 6616 } 6617 6618 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6619 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6620 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6621 } 6622 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6623 // restart le resolving list update 6624 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6625 } 6626 return ERROR_CODE_SUCCESS; 6627 } 6628 #endif 6629 6630 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6631 void hci_setup_test_connections_fuzz(void){ 6632 hci_connection_t * conn; 6633 6634 // default address: 66:55:44:33:00:01 6635 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6636 6637 // setup Controller info 6638 hci_stack->num_cmd_packets = 255; 6639 hci_stack->acl_packets_total_num = 255; 6640 6641 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6642 addr[5] = 0x01; 6643 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6644 conn->con_handle = addr[5]; 6645 conn->role = HCI_ROLE_SLAVE; 6646 conn->state = RECEIVED_CONNECTION_REQUEST; 6647 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6648 6649 // setup incoming Classic SCO connection with con handle 0x0002 6650 addr[5] = 0x02; 6651 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6652 conn->con_handle = addr[5]; 6653 conn->role = HCI_ROLE_SLAVE; 6654 conn->state = RECEIVED_CONNECTION_REQUEST; 6655 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6656 6657 // setup ready Classic ACL connection with con handle 0x0003 6658 addr[5] = 0x03; 6659 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6660 conn->con_handle = addr[5]; 6661 conn->role = HCI_ROLE_SLAVE; 6662 conn->state = OPEN; 6663 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6664 6665 // setup ready Classic SCO connection with con handle 0x0004 6666 addr[5] = 0x04; 6667 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6668 conn->con_handle = addr[5]; 6669 conn->role = HCI_ROLE_SLAVE; 6670 conn->state = OPEN; 6671 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6672 6673 // setup ready LE ACL connection with con handle 0x005 and public address 6674 addr[5] = 0x05; 6675 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6676 conn->con_handle = addr[5]; 6677 conn->role = HCI_ROLE_SLAVE; 6678 conn->state = OPEN; 6679 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6680 conn->sm_connection.sm_connection_encrypted = 1; 6681 } 6682 6683 void hci_free_connections_fuzz(void){ 6684 btstack_linked_list_iterator_t it; 6685 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6686 while (btstack_linked_list_iterator_has_next(&it)){ 6687 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6688 btstack_linked_list_iterator_remove(&it); 6689 btstack_memory_hci_connection_free(con); 6690 } 6691 } 6692 void hci_simulate_working_fuzz(void){ 6693 hci_init_done(); 6694 hci_stack->num_cmd_packets = 255; 6695 } 6696 #endif 6697