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 // if we are responder, use minimal service security level as required level 409 if (!initiator){ 410 hci_connection->requested_security_level = btstack_max(hci_connection->requested_security_level, hci_stack->gap_minimal_service_security_level); 411 } 412 413 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 414 415 uint8_t event[12]; 416 event[0] = GAP_EVENT_PAIRING_STARTED; 417 event[1] = 10; 418 reverse_bd_addr(hci_connection->address, &event[2]); 419 little_endian_store_16(event, 8, (uint16_t) hci_connection->con_handle); 420 event[10] = (uint8_t) ssp; 421 event[11] = (uint8_t) initiator; 422 hci_emit_event(event, sizeof(event), 1); 423 } 424 425 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 426 if (!hci_pairing_active(hci_connection)) return; 427 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 428 log_info("pairing complete, status %02x", status); 429 430 uint8_t event[12]; 431 event[0] = GAP_EVENT_PAIRING_COMPLETE; 432 event[1] = 9; 433 reverse_bd_addr(hci_connection->address, &event[2]); 434 little_endian_store_16(event, 8, (uint16_t) hci_connection->con_handle); 435 event[10] = status; 436 hci_emit_event(event, sizeof(event), 1); 437 } 438 439 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 440 hci_connection_t * conn = hci_connection_for_handle(handle); 441 if (!conn) return 0; 442 return (int) hci_pairing_active(conn); 443 } 444 445 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 446 if (!hci_stack->link_key_db) return; 447 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 448 hci_stack->link_key_db->delete_link_key(addr); 449 } 450 451 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 452 if (!hci_stack->link_key_db) return; 453 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 454 hci_stack->link_key_db->put_link_key(addr, link_key, type); 455 } 456 457 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 458 if (!hci_stack->link_key_db) return false; 459 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 460 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 461 return result; 462 } 463 464 void gap_delete_all_link_keys(void){ 465 bd_addr_t addr; 466 link_key_t link_key; 467 link_key_type_t type; 468 btstack_link_key_iterator_t it; 469 int ok = gap_link_key_iterator_init(&it); 470 if (!ok) { 471 log_error("could not initialize iterator"); 472 return; 473 } 474 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 475 gap_drop_link_key_for_bd_addr(addr); 476 } 477 gap_link_key_iterator_done(&it); 478 } 479 480 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 481 if (!hci_stack->link_key_db) return 0; 482 if (!hci_stack->link_key_db->iterator_init) return 0; 483 return hci_stack->link_key_db->iterator_init(it); 484 } 485 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){ 486 if (!hci_stack->link_key_db) return 0; 487 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 488 } 489 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 490 if (!hci_stack->link_key_db) return; 491 hci_stack->link_key_db->iterator_done(it); 492 } 493 #endif 494 495 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 496 switch (address_type){ 497 case BD_ADDR_TYPE_LE_PUBLIC: 498 case BD_ADDR_TYPE_LE_RANDOM: 499 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 500 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 501 return true; 502 default: 503 return false; 504 } 505 } 506 507 static int hci_is_le_connection(hci_connection_t * connection){ 508 return hci_is_le_connection_type(connection->address_type); 509 } 510 511 /** 512 * count connections 513 */ 514 static int nr_hci_connections(void){ 515 int count = 0; 516 btstack_linked_item_t *it; 517 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 518 count++; 519 } 520 return count; 521 } 522 523 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 524 525 unsigned int num_packets_sent_classic = 0; 526 unsigned int num_packets_sent_le = 0; 527 528 btstack_linked_item_t *it; 529 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 530 hci_connection_t * connection = (hci_connection_t *) it; 531 if (hci_is_le_connection(connection)){ 532 num_packets_sent_le += connection->num_packets_sent; 533 } 534 if (connection->address_type == BD_ADDR_TYPE_ACL){ 535 num_packets_sent_classic += connection->num_packets_sent; 536 } 537 } 538 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 539 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 540 int free_slots_le = 0; 541 542 if (free_slots_classic < 0){ 543 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); 544 return 0; 545 } 546 547 if (hci_stack->le_acl_packets_total_num){ 548 // if we have LE slots, they are used 549 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 550 if (free_slots_le < 0){ 551 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); 552 return 0; 553 } 554 } else { 555 // otherwise, classic slots are used for LE, too 556 free_slots_classic -= num_packets_sent_le; 557 if (free_slots_classic < 0){ 558 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); 559 return 0; 560 } 561 } 562 563 switch (address_type){ 564 case BD_ADDR_TYPE_UNKNOWN: 565 log_error("hci_number_free_acl_slots: unknown address type"); 566 return 0; 567 568 case BD_ADDR_TYPE_ACL: 569 return free_slots_classic; 570 571 default: 572 if (hci_stack->le_acl_packets_total_num){ 573 return free_slots_le; 574 } 575 return free_slots_classic; 576 } 577 } 578 579 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 580 // get connection type 581 hci_connection_t * connection = hci_connection_for_handle(con_handle); 582 if (!connection){ 583 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 584 return 0; 585 } 586 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 587 } 588 589 #ifdef ENABLE_CLASSIC 590 static int hci_number_free_sco_slots(void){ 591 unsigned int num_sco_packets_sent = 0; 592 btstack_linked_item_t *it; 593 if (hci_stack->synchronous_flow_control_enabled){ 594 // explicit flow control 595 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 596 hci_connection_t * connection = (hci_connection_t *) it; 597 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 598 num_sco_packets_sent += connection->num_packets_sent; 599 } 600 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 601 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 602 return 0; 603 } 604 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 605 } else { 606 // implicit flow control -- TODO 607 int num_ready = 0; 608 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 609 hci_connection_t * connection = (hci_connection_t *) it; 610 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 611 if (connection->sco_tx_ready == 0) continue; 612 num_ready++; 613 } 614 return num_ready; 615 } 616 } 617 #endif 618 619 // only used to send HCI Host Number Completed Packets 620 static int hci_can_send_comand_packet_transport(void){ 621 if (hci_stack->hci_packet_buffer_reserved) return 0; 622 623 // check for async hci transport implementations 624 if (hci_stack->hci_transport->can_send_packet_now){ 625 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 626 return 0; 627 } 628 } 629 return 1; 630 } 631 632 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 633 int hci_can_send_command_packet_now(void){ 634 if (hci_can_send_comand_packet_transport() == 0) return 0; 635 return hci_stack->num_cmd_packets > 0u; 636 } 637 638 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 639 // check for async hci transport implementations 640 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 641 return hci_stack->hci_transport->can_send_packet_now(packet_type); 642 } 643 644 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 645 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 646 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 647 } 648 649 int hci_can_send_acl_le_packet_now(void){ 650 if (hci_stack->hci_packet_buffer_reserved) return 0; 651 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 652 } 653 654 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 655 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 656 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 657 } 658 659 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 660 if (hci_stack->hci_packet_buffer_reserved) return 0; 661 return hci_can_send_prepared_acl_packet_now(con_handle); 662 } 663 664 #ifdef ENABLE_CLASSIC 665 int hci_can_send_acl_classic_packet_now(void){ 666 if (hci_stack->hci_packet_buffer_reserved) return 0; 667 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 668 } 669 670 int hci_can_send_prepared_sco_packet_now(void){ 671 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 672 if (hci_have_usb_transport()){ 673 return hci_stack->sco_can_send_now; 674 } else { 675 return hci_number_free_sco_slots() > 0; 676 } 677 } 678 679 int hci_can_send_sco_packet_now(void){ 680 if (hci_stack->hci_packet_buffer_reserved) return 0; 681 return hci_can_send_prepared_sco_packet_now(); 682 } 683 684 void hci_request_sco_can_send_now_event(void){ 685 hci_stack->sco_waiting_for_can_send_now = 1; 686 hci_notify_if_sco_can_send_now(); 687 } 688 #endif 689 690 // used for internal checks in l2cap.c 691 int hci_is_packet_buffer_reserved(void){ 692 return hci_stack->hci_packet_buffer_reserved; 693 } 694 695 // reserves outgoing packet buffer. @returns 1 if successful 696 int hci_reserve_packet_buffer(void){ 697 if (hci_stack->hci_packet_buffer_reserved) { 698 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 699 return 0; 700 } 701 hci_stack->hci_packet_buffer_reserved = 1; 702 return 1; 703 } 704 705 void hci_release_packet_buffer(void){ 706 hci_stack->hci_packet_buffer_reserved = 0; 707 } 708 709 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 710 static int hci_transport_synchronous(void){ 711 return hci_stack->hci_transport->can_send_packet_now == NULL; 712 } 713 714 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 715 716 // 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); 717 718 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 719 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 720 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 721 max_acl_data_packet_length = hci_stack->le_data_packets_length; 722 } 723 724 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 725 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 726 max_acl_data_packet_length = connection->le_max_tx_octets; 727 } 728 #endif 729 730 log_debug("hci_send_acl_packet_fragments entered"); 731 732 int err; 733 // multiple packets could be send on a synchronous HCI transport 734 while (true){ 735 736 log_debug("hci_send_acl_packet_fragments loop entered"); 737 738 // get current data 739 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 740 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 741 bool more_fragments = false; 742 743 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 744 if (current_acl_data_packet_length > max_acl_data_packet_length){ 745 more_fragments = true; 746 current_acl_data_packet_length = max_acl_data_packet_length; 747 } 748 749 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 750 if (acl_header_pos > 0u){ 751 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 752 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 753 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 754 } 755 756 // update header len 757 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 758 759 // count packet 760 connection->num_packets_sent++; 761 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 762 763 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 764 if (more_fragments){ 765 // update start of next fragment to send 766 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 767 } else { 768 // done 769 hci_stack->acl_fragmentation_pos = 0; 770 hci_stack->acl_fragmentation_total_size = 0; 771 } 772 773 // send packet 774 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 775 const int size = current_acl_data_packet_length + 4; 776 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 777 hci_stack->acl_fragmentation_tx_active = 1; 778 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 779 780 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 781 782 // done yet? 783 if (!more_fragments) break; 784 785 // can send more? 786 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 787 } 788 789 log_debug("hci_send_acl_packet_fragments loop over"); 790 791 // release buffer now for synchronous transport 792 if (hci_transport_synchronous()){ 793 hci_stack->acl_fragmentation_tx_active = 0; 794 hci_release_packet_buffer(); 795 hci_emit_transport_packet_sent(); 796 } 797 798 return err; 799 } 800 801 // pre: caller has reserved the packet buffer 802 int hci_send_acl_packet_buffer(int size){ 803 804 // log_info("hci_send_acl_packet_buffer size %u", size); 805 806 if (!hci_stack->hci_packet_buffer_reserved) { 807 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 808 return 0; 809 } 810 811 uint8_t * packet = hci_stack->hci_packet_buffer; 812 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 813 814 // check for free places on Bluetooth module 815 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 816 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 817 hci_release_packet_buffer(); 818 hci_emit_transport_packet_sent(); 819 return BTSTACK_ACL_BUFFERS_FULL; 820 } 821 822 hci_connection_t *connection = hci_connection_for_handle( con_handle); 823 if (!connection) { 824 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 825 hci_release_packet_buffer(); 826 hci_emit_transport_packet_sent(); 827 return 0; 828 } 829 830 #ifdef ENABLE_CLASSIC 831 hci_connection_timestamp(connection); 832 #endif 833 834 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 835 836 // setup data 837 hci_stack->acl_fragmentation_total_size = size; 838 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 839 840 return hci_send_acl_packet_fragments(connection); 841 } 842 843 #ifdef ENABLE_CLASSIC 844 // pre: caller has reserved the packet buffer 845 int hci_send_sco_packet_buffer(int size){ 846 847 // log_info("hci_send_acl_packet_buffer size %u", size); 848 849 if (!hci_stack->hci_packet_buffer_reserved) { 850 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 851 return 0; 852 } 853 854 uint8_t * packet = hci_stack->hci_packet_buffer; 855 856 // skip checks in loopback mode 857 if (!hci_stack->loopback_mode){ 858 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 859 860 // check for free places on Bluetooth module 861 if (!hci_can_send_prepared_sco_packet_now()) { 862 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 863 hci_release_packet_buffer(); 864 hci_emit_transport_packet_sent(); 865 return BTSTACK_ACL_BUFFERS_FULL; 866 } 867 868 // track send packet in connection struct 869 hci_connection_t *connection = hci_connection_for_handle( con_handle); 870 if (!connection) { 871 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 872 hci_release_packet_buffer(); 873 hci_emit_transport_packet_sent(); 874 return 0; 875 } 876 877 if (hci_have_usb_transport()){ 878 // token used 879 hci_stack->sco_can_send_now = 0; 880 } else { 881 if (hci_stack->synchronous_flow_control_enabled){ 882 connection->num_packets_sent++; 883 } else { 884 connection->sco_tx_ready--; 885 } 886 } 887 } 888 889 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 890 891 #ifdef HAVE_SCO_TRANSPORT 892 hci_stack->sco_transport->send_packet(packet, size); 893 hci_release_packet_buffer(); 894 hci_emit_transport_packet_sent(); 895 896 return 0; 897 #else 898 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 899 if (hci_transport_synchronous()){ 900 hci_release_packet_buffer(); 901 hci_emit_transport_packet_sent(); 902 } 903 904 return err; 905 #endif 906 } 907 #endif 908 909 static void acl_handler(uint8_t *packet, uint16_t size){ 910 911 // get info 912 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 913 hci_connection_t *conn = hci_connection_for_handle(con_handle); 914 uint8_t acl_flags = READ_ACL_FLAGS(packet); 915 uint16_t acl_length = READ_ACL_LENGTH(packet); 916 917 // ignore non-registered handle 918 if (!conn){ 919 log_error("acl_handler called with non-registered handle %u!" , con_handle); 920 return; 921 } 922 923 // assert packet is complete 924 if ((acl_length + 4u) != size){ 925 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 926 return; 927 } 928 929 #ifdef ENABLE_CLASSIC 930 // update idle timestamp 931 hci_connection_timestamp(conn); 932 #endif 933 934 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 935 hci_stack->host_completed_packets = 1; 936 conn->num_packets_completed++; 937 #endif 938 939 // handle different packet types 940 switch (acl_flags & 0x03u) { 941 942 case 0x01: // continuation fragment 943 944 // sanity checks 945 if (conn->acl_recombination_pos == 0u) { 946 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 947 return; 948 } 949 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 950 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 951 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 952 conn->acl_recombination_pos = 0; 953 return; 954 } 955 956 // append fragment payload (header already stored) 957 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 958 &packet[4], acl_length); 959 conn->acl_recombination_pos += acl_length; 960 961 // forward complete L2CAP packet if complete. 962 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 963 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 964 // reset recombination buffer 965 conn->acl_recombination_length = 0; 966 conn->acl_recombination_pos = 0; 967 } 968 break; 969 970 case 0x02: { // first fragment 971 972 // sanity check 973 if (conn->acl_recombination_pos) { 974 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 975 conn->acl_recombination_pos = 0; 976 } 977 978 // peek into L2CAP packet! 979 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 980 981 // compare fragment size to L2CAP packet size 982 if (acl_length >= (l2cap_length + 4u)){ 983 // forward fragment as L2CAP packet 984 hci_emit_acl_packet(packet, acl_length + 4u); 985 } else { 986 987 if (acl_length > HCI_ACL_BUFFER_SIZE){ 988 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 989 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 990 return; 991 } 992 993 // store first fragment and tweak acl length for complete package 994 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 995 packet, acl_length + 4u); 996 conn->acl_recombination_pos = acl_length + 4u; 997 conn->acl_recombination_length = l2cap_length; 998 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 999 } 1000 break; 1001 1002 } 1003 default: 1004 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1005 return; 1006 } 1007 1008 // execute main loop 1009 hci_run(); 1010 } 1011 1012 static void hci_shutdown_connection(hci_connection_t *conn){ 1013 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1014 1015 #ifdef ENABLE_CLASSIC 1016 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1017 bd_addr_type_t addr_type = conn->address_type; 1018 #endif 1019 #ifdef HAVE_SCO_TRANSPORT 1020 hci_con_handle_t con_handle = conn->con_handle; 1021 #endif 1022 #endif 1023 1024 btstack_run_loop_remove_timer(&conn->timeout); 1025 1026 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1027 btstack_memory_hci_connection_free( conn ); 1028 1029 // now it's gone 1030 hci_emit_nr_connections_changed(); 1031 1032 #ifdef ENABLE_CLASSIC 1033 #ifdef ENABLE_SCO_OVER_HCI 1034 // update SCO 1035 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1036 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1037 } 1038 #endif 1039 #ifdef HAVE_SCO_TRANSPORT 1040 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1041 hci_stack->sco_transport->close(con_handle); 1042 } 1043 #endif 1044 #endif 1045 } 1046 1047 #ifdef ENABLE_CLASSIC 1048 1049 static const uint16_t packet_type_sizes[] = { 1050 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1051 HCI_ACL_DH1_SIZE, 0, 0, 0, 1052 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1053 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1054 }; 1055 static const uint8_t packet_type_feature_requirement_bit[] = { 1056 0, // 3 slot packets 1057 1, // 5 slot packets 1058 25, // EDR 2 mpbs 1059 26, // EDR 3 mbps 1060 39, // 3 slot EDR packts 1061 40, // 5 slot EDR packet 1062 }; 1063 static const uint16_t packet_type_feature_packet_mask[] = { 1064 0x0f00, // 3 slot packets 1065 0xf000, // 5 slot packets 1066 0x1102, // EDR 2 mpbs 1067 0x2204, // EDR 3 mbps 1068 0x0300, // 3 slot EDR packts 1069 0x3000, // 5 slot EDR packet 1070 }; 1071 1072 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1073 // enable packet types based on size 1074 uint16_t packet_types = 0; 1075 unsigned int i; 1076 for (i=0;i<16;i++){ 1077 if (packet_type_sizes[i] == 0) continue; 1078 if (packet_type_sizes[i] <= buffer_size){ 1079 packet_types |= 1 << i; 1080 } 1081 } 1082 // disable packet types due to missing local supported features 1083 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1084 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1085 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1086 if (feature_set) continue; 1087 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1088 packet_types &= ~packet_type_feature_packet_mask[i]; 1089 } 1090 // flip bits for "may not be used" 1091 packet_types ^= 0x3306; 1092 return packet_types; 1093 } 1094 1095 uint16_t hci_usable_acl_packet_types(void){ 1096 return hci_stack->packet_types; 1097 } 1098 #endif 1099 1100 uint8_t* hci_get_outgoing_packet_buffer(void){ 1101 // hci packet buffer is >= acl data packet length 1102 return hci_stack->hci_packet_buffer; 1103 } 1104 1105 uint16_t hci_max_acl_data_packet_length(void){ 1106 return hci_stack->acl_data_packet_length; 1107 } 1108 1109 #ifdef ENABLE_CLASSIC 1110 int hci_extended_sco_link_supported(void){ 1111 // No. 31, byte 3, bit 7 1112 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1113 } 1114 #endif 1115 1116 int hci_non_flushable_packet_boundary_flag_supported(void){ 1117 // No. 54, byte 6, bit 6 1118 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1119 } 1120 1121 static int gap_ssp_supported(void){ 1122 // No. 51, byte 6, bit 3 1123 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1124 } 1125 1126 static int hci_classic_supported(void){ 1127 #ifdef ENABLE_CLASSIC 1128 // No. 37, byte 4, bit 5, = No BR/EDR Support 1129 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1130 #else 1131 return 0; 1132 #endif 1133 } 1134 1135 static int hci_le_supported(void){ 1136 #ifdef ENABLE_BLE 1137 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1138 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1139 #else 1140 return 0; 1141 #endif 1142 } 1143 1144 #ifdef ENABLE_BLE 1145 1146 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1147 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1148 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1149 } else { 1150 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1151 } 1152 } 1153 1154 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1155 *addr_type = hci_stack->le_own_addr_type; 1156 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1157 } 1158 1159 #ifdef ENABLE_LE_PERIPHERAL 1160 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1161 *addr_type = hci_stack->le_advertisements_own_addr_type; 1162 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1163 }; 1164 #endif 1165 1166 #ifdef ENABLE_LE_CENTRAL 1167 1168 /** 1169 * @brief Get own addr type and address used for LE connections (Central) 1170 */ 1171 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1172 *addr_type = hci_stack->le_connection_own_addr_type; 1173 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1174 } 1175 1176 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1177 1178 int offset = 3; 1179 int num_reports = packet[offset]; 1180 offset += 1; 1181 1182 int i; 1183 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1184 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1185 for (i=0; (i<num_reports) && (offset < size);i++){ 1186 // sanity checks on data_length: 1187 uint8_t data_length = packet[offset + 8]; 1188 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1189 if ((offset + 9u + data_length + 1u) > size) return; 1190 // setup event 1191 uint8_t event_size = 10u + data_length; 1192 int pos = 0; 1193 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1194 event[pos++] = event_size; 1195 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1196 offset += 8; 1197 pos += 8; 1198 event[pos++] = packet[offset + 1 + data_length]; // rssi 1199 event[pos++] = data_length; 1200 offset++; 1201 (void)memcpy(&event[pos], &packet[offset], data_length); 1202 pos += data_length; 1203 offset += data_length + 1u; // rssi 1204 hci_emit_event(event, pos, 1); 1205 } 1206 } 1207 #endif 1208 #endif 1209 1210 #ifdef ENABLE_BLE 1211 #ifdef ENABLE_LE_PERIPHERAL 1212 static void hci_update_advertisements_enabled_for_current_roles(void){ 1213 if (hci_stack->le_advertisements_enabled){ 1214 // get number of active le slave connections 1215 int num_slave_connections = 0; 1216 btstack_linked_list_iterator_t it; 1217 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1218 while (btstack_linked_list_iterator_has_next(&it)){ 1219 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1220 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1221 if (con->state != OPEN) continue; 1222 if (con->role != HCI_ROLE_SLAVE) continue; 1223 if (!hci_is_le_connection(con)) continue; 1224 num_slave_connections++; 1225 } 1226 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1227 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1228 } else { 1229 hci_stack->le_advertisements_enabled_for_current_roles = false; 1230 } 1231 } 1232 #endif 1233 #endif 1234 1235 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1236 1237 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1238 if (!hci_stack->config) return 0; 1239 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1240 // Limit baud rate for Broadcom chipsets to 3 mbps 1241 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1242 baud_rate = 3000000; 1243 } 1244 return baud_rate; 1245 } 1246 1247 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1248 UNUSED(ds); 1249 1250 switch (hci_stack->substate){ 1251 case HCI_INIT_W4_SEND_RESET: 1252 log_info("Resend HCI Reset"); 1253 hci_stack->substate = HCI_INIT_SEND_RESET; 1254 hci_stack->num_cmd_packets = 1; 1255 hci_run(); 1256 break; 1257 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1258 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1259 if (hci_stack->hci_transport->reset_link){ 1260 hci_stack->hci_transport->reset_link(); 1261 } 1262 1263 /* fall through */ 1264 1265 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1266 log_info("Resend HCI Reset - CSR Warm Boot"); 1267 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1268 hci_stack->num_cmd_packets = 1; 1269 hci_run(); 1270 break; 1271 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1272 if (hci_stack->hci_transport->set_baudrate){ 1273 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1274 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1275 hci_stack->hci_transport->set_baudrate(baud_rate); 1276 } 1277 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1278 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1279 if (hci_stack->hci_transport->reset_link){ 1280 log_info("Link Reset"); 1281 hci_stack->hci_transport->reset_link(); 1282 } 1283 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1284 hci_run(); 1285 } 1286 break; 1287 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1288 // otherwise continue 1289 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1290 hci_send_cmd(&hci_read_local_supported_commands); 1291 break; 1292 default: 1293 break; 1294 } 1295 } 1296 #endif 1297 1298 static void hci_initializing_next_state(void){ 1299 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1300 } 1301 1302 // assumption: hci_can_send_command_packet_now() == true 1303 static void hci_initializing_run(void){ 1304 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1305 switch (hci_stack->substate){ 1306 case HCI_INIT_SEND_RESET: 1307 hci_state_reset(); 1308 1309 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1310 // prepare reset if command complete not received in 100ms 1311 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1312 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1313 btstack_run_loop_add_timer(&hci_stack->timeout); 1314 #endif 1315 // send command 1316 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1317 hci_send_cmd(&hci_reset); 1318 break; 1319 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1320 hci_send_cmd(&hci_read_local_version_information); 1321 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1322 break; 1323 case HCI_INIT_SEND_READ_LOCAL_NAME: 1324 hci_send_cmd(&hci_read_local_name); 1325 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1326 break; 1327 1328 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1329 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1330 hci_state_reset(); 1331 // prepare reset if command complete not received in 100ms 1332 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1333 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1334 btstack_run_loop_add_timer(&hci_stack->timeout); 1335 // send command 1336 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1337 hci_send_cmd(&hci_reset); 1338 break; 1339 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1340 hci_state_reset(); 1341 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1342 hci_send_cmd(&hci_reset); 1343 break; 1344 case HCI_INIT_SEND_BAUD_CHANGE: { 1345 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1346 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1347 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1348 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1349 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1350 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1351 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1352 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1353 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1354 btstack_run_loop_add_timer(&hci_stack->timeout); 1355 } 1356 break; 1357 } 1358 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1359 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1360 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1361 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1362 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1363 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1364 break; 1365 } 1366 case HCI_INIT_CUSTOM_INIT: 1367 // Custom initialization 1368 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1369 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1370 bool send_cmd = false; 1371 switch (hci_stack->chipset_result){ 1372 case BTSTACK_CHIPSET_VALID_COMMAND: 1373 send_cmd = true; 1374 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1375 break; 1376 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1377 send_cmd = true; 1378 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1379 log_info("CSR Warm Boot"); 1380 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1381 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1382 btstack_run_loop_add_timer(&hci_stack->timeout); 1383 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1384 && hci_stack->config 1385 && hci_stack->chipset 1386 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1387 && hci_stack->hci_transport->set_baudrate 1388 && hci_transport_uart_get_main_baud_rate()){ 1389 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1390 } else { 1391 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1392 } 1393 break; 1394 default: 1395 break; 1396 } 1397 1398 if (send_cmd){ 1399 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1400 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1401 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1402 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1403 break; 1404 } 1405 log_info("Init script done"); 1406 1407 // Init script download on Broadcom chipsets causes: 1408 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1409 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1410 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1411 1412 // - baud rate to reset, restore UART baud rate if needed 1413 int need_baud_change = hci_stack->config 1414 && hci_stack->chipset 1415 && hci_stack->chipset->set_baudrate_command 1416 && hci_stack->hci_transport->set_baudrate 1417 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1418 if (need_baud_change) { 1419 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1420 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1421 hci_stack->hci_transport->set_baudrate(baud_rate); 1422 } 1423 1424 uint16_t bcm_delay_ms = 300; 1425 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1426 // -> Work around: wait here. 1427 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1428 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1429 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1430 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1431 btstack_run_loop_add_timer(&hci_stack->timeout); 1432 break; 1433 } 1434 } 1435 // otherwise continue 1436 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1437 hci_send_cmd(&hci_read_local_supported_commands); 1438 break; 1439 case HCI_INIT_SET_BD_ADDR: 1440 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1441 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1442 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1443 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1444 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1445 break; 1446 #endif 1447 1448 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1449 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1450 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1451 hci_send_cmd(&hci_read_local_supported_commands); 1452 break; 1453 case HCI_INIT_READ_BD_ADDR: 1454 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1455 hci_send_cmd(&hci_read_bd_addr); 1456 break; 1457 case HCI_INIT_READ_BUFFER_SIZE: 1458 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1459 hci_send_cmd(&hci_read_buffer_size); 1460 break; 1461 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1462 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1463 hci_send_cmd(&hci_read_local_supported_features); 1464 break; 1465 1466 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1467 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1468 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1469 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1470 break; 1471 case HCI_INIT_HOST_BUFFER_SIZE: 1472 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1473 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1474 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1475 break; 1476 #endif 1477 1478 case HCI_INIT_SET_EVENT_MASK: 1479 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1480 if (hci_le_supported()){ 1481 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1482 } else { 1483 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1484 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1485 } 1486 break; 1487 1488 #ifdef ENABLE_CLASSIC 1489 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1490 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1491 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1492 break; 1493 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1494 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1495 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1496 break; 1497 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1498 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1499 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1500 break; 1501 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1502 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1503 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1504 break; 1505 case HCI_INIT_WRITE_LOCAL_NAME: { 1506 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1507 hci_reserve_packet_buffer(); 1508 uint8_t * packet = hci_stack->hci_packet_buffer; 1509 // construct HCI Command and send 1510 uint16_t opcode = hci_write_local_name.opcode; 1511 hci_stack->last_cmd_opcode = opcode; 1512 packet[0] = opcode & 0xff; 1513 packet[1] = opcode >> 8; 1514 packet[2] = DEVICE_NAME_LEN; 1515 memset(&packet[3], 0, DEVICE_NAME_LEN); 1516 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1517 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1518 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1519 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1520 // expand '00:00:00:00:00:00' in name with bd_addr 1521 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1522 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1523 break; 1524 } 1525 case HCI_INIT_WRITE_EIR_DATA: { 1526 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1527 hci_reserve_packet_buffer(); 1528 uint8_t * packet = hci_stack->hci_packet_buffer; 1529 // construct HCI Command in-place and send 1530 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1531 hci_stack->last_cmd_opcode = opcode; 1532 uint16_t offset = 0; 1533 packet[offset++] = opcode & 0xff; 1534 packet[offset++] = opcode >> 8; 1535 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1536 packet[offset++] = 0; // FEC not required 1537 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1538 if (hci_stack->eir_data){ 1539 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1540 ad_context_t context; 1541 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1542 uint8_t data_type = ad_iterator_get_data_type(&context); 1543 uint8_t size = ad_iterator_get_data_len(&context); 1544 const uint8_t *data = ad_iterator_get_data(&context); 1545 // copy item 1546 packet[offset++] = size + 1; 1547 packet[offset++] = data_type; 1548 memcpy(&packet[offset], data, size); 1549 // update name item 1550 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1551 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1552 } 1553 offset += size; 1554 } 1555 } else { 1556 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1557 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1558 packet[offset++] = bytes_to_copy + 1; 1559 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1560 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1561 // expand '00:00:00:00:00:00' in name with bd_addr 1562 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1563 } 1564 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1565 break; 1566 } 1567 case HCI_INIT_WRITE_INQUIRY_MODE: 1568 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1569 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1570 break; 1571 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1572 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1573 hci_stack->secure_connections_active = true; 1574 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1575 break; 1576 case HCI_INIT_WRITE_SCAN_ENABLE: 1577 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1578 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1579 break; 1580 // only sent if ENABLE_SCO_OVER_HCI is defined 1581 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1582 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1583 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1584 break; 1585 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1586 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1587 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1588 break; 1589 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1590 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1591 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1592 #ifdef ENABLE_SCO_OVER_HCI 1593 log_info("BCM: Route SCO data via HCI transport"); 1594 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1595 #endif 1596 #ifdef ENABLE_SCO_OVER_PCM 1597 log_info("BCM: Route SCO data via PCM interface"); 1598 #ifdef ENABLE_BCM_PCM_WBS 1599 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1600 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1601 #else 1602 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1603 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1604 #endif 1605 #endif 1606 break; 1607 #ifdef ENABLE_SCO_OVER_PCM 1608 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1609 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1610 log_info("BCM: Config PCM interface for I2S"); 1611 #ifdef ENABLE_BCM_PCM_WBS 1612 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1613 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1614 #else 1615 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1616 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1617 #endif 1618 break; 1619 #endif 1620 #endif 1621 1622 #ifdef ENABLE_BLE 1623 // LE INIT 1624 case HCI_INIT_LE_READ_BUFFER_SIZE: 1625 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1626 hci_send_cmd(&hci_le_read_buffer_size); 1627 break; 1628 case HCI_INIT_LE_SET_EVENT_MASK: 1629 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1630 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1631 break; 1632 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1633 // LE Supported Host = 1, Simultaneous Host = 0 1634 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1635 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1636 break; 1637 #endif 1638 1639 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1640 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1641 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1642 hci_send_cmd(&hci_le_read_maximum_data_length); 1643 break; 1644 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1645 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1646 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1647 break; 1648 #endif 1649 1650 #ifdef ENABLE_LE_CENTRAL 1651 case HCI_INIT_READ_WHITE_LIST_SIZE: 1652 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1653 hci_send_cmd(&hci_le_read_white_list_size); 1654 break; 1655 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1656 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1657 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); 1658 break; 1659 #endif 1660 default: 1661 return; 1662 } 1663 } 1664 1665 static void hci_init_done(void){ 1666 // done. tell the app 1667 log_info("hci_init_done -> HCI_STATE_WORKING"); 1668 hci_stack->state = HCI_STATE_WORKING; 1669 hci_emit_state(); 1670 hci_run(); 1671 } 1672 1673 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1674 bool command_completed = false; 1675 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1676 uint16_t opcode = little_endian_read_16(packet,3); 1677 if (opcode == hci_stack->last_cmd_opcode){ 1678 command_completed = true; 1679 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1680 } else { 1681 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1682 } 1683 } 1684 1685 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1686 uint8_t status = packet[2]; 1687 uint16_t opcode = little_endian_read_16(packet,4); 1688 if (opcode == hci_stack->last_cmd_opcode){ 1689 if (status){ 1690 command_completed = true; 1691 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1692 } else { 1693 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1694 } 1695 } else { 1696 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1697 } 1698 } 1699 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1700 // Vendor == CSR 1701 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1702 // TODO: track actual command 1703 command_completed = true; 1704 } 1705 1706 // Vendor == Toshiba 1707 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1708 // TODO: track actual command 1709 command_completed = true; 1710 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1711 hci_stack->num_cmd_packets = 1; 1712 } 1713 #endif 1714 1715 return command_completed; 1716 } 1717 1718 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1719 1720 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1721 1722 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1723 1724 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1725 1726 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1727 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1728 // 1729 // HCI Reset 1730 // Timeout 100 ms 1731 // HCI Reset 1732 // Command Complete Reset 1733 // HCI Read Local Version Information 1734 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1735 // hang... 1736 // 1737 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1738 if (!command_completed 1739 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1740 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1741 1742 uint16_t opcode = little_endian_read_16(packet,3); 1743 if (opcode == hci_reset.opcode){ 1744 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1745 return; 1746 } 1747 } 1748 1749 // CSR & H5 1750 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1751 if (!command_completed 1752 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1753 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1754 1755 uint16_t opcode = little_endian_read_16(packet,3); 1756 if (opcode == hci_reset.opcode){ 1757 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1758 return; 1759 } 1760 } 1761 1762 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1763 // fix: Correct substate and behave as command below 1764 if (command_completed){ 1765 switch (hci_stack->substate){ 1766 case HCI_INIT_SEND_RESET: 1767 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1768 break; 1769 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1770 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1771 break; 1772 default: 1773 break; 1774 } 1775 } 1776 1777 #endif 1778 1779 if (!command_completed) return; 1780 1781 bool need_baud_change = false; 1782 bool need_addr_change = false; 1783 1784 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1785 need_baud_change = hci_stack->config 1786 && hci_stack->chipset 1787 && hci_stack->chipset->set_baudrate_command 1788 && hci_stack->hci_transport->set_baudrate 1789 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1790 1791 need_addr_change = hci_stack->custom_bd_addr_set 1792 && hci_stack->chipset 1793 && hci_stack->chipset->set_bd_addr_command; 1794 #endif 1795 1796 switch(hci_stack->substate){ 1797 1798 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1799 case HCI_INIT_SEND_RESET: 1800 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1801 // fix: just correct substate and behave as command below 1802 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1803 btstack_run_loop_remove_timer(&hci_stack->timeout); 1804 break; 1805 case HCI_INIT_W4_SEND_RESET: 1806 btstack_run_loop_remove_timer(&hci_stack->timeout); 1807 break; 1808 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1809 log_info("Received local name, need baud change %d", (int) need_baud_change); 1810 if (need_baud_change){ 1811 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1812 return; 1813 } 1814 // skip baud change 1815 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1816 return; 1817 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1818 // for STLC2500D, baud rate change already happened. 1819 // for others, baud rate gets changed now 1820 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1821 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1822 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1823 hci_stack->hci_transport->set_baudrate(baud_rate); 1824 } 1825 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1826 return; 1827 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1828 btstack_run_loop_remove_timer(&hci_stack->timeout); 1829 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1830 return; 1831 case HCI_INIT_W4_CUSTOM_INIT: 1832 // repeat custom init 1833 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1834 return; 1835 #else 1836 case HCI_INIT_W4_SEND_RESET: 1837 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1838 return ; 1839 #endif 1840 1841 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1842 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1843 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1844 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1845 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1846 return; 1847 } 1848 if (need_addr_change){ 1849 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1850 return; 1851 } 1852 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1853 return; 1854 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1855 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1856 if (need_baud_change){ 1857 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1858 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1859 hci_stack->hci_transport->set_baudrate(baud_rate); 1860 } 1861 if (need_addr_change){ 1862 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1863 return; 1864 } 1865 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1866 return; 1867 case HCI_INIT_W4_SET_BD_ADDR: 1868 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1869 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1870 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1871 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1872 return; 1873 } 1874 // skipping st warm boot 1875 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1876 return; 1877 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1878 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1879 return; 1880 #endif 1881 case HCI_INIT_W4_READ_BD_ADDR: 1882 // only read buffer size if supported 1883 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1884 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1885 return; 1886 } 1887 // skipping read buffer size 1888 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1889 return; 1890 case HCI_INIT_W4_SET_EVENT_MASK: 1891 // skip Classic init commands for LE only chipsets 1892 if (!hci_classic_supported()){ 1893 #ifdef ENABLE_BLE 1894 if (hci_le_supported()){ 1895 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1896 return; 1897 } 1898 #endif 1899 log_error("Neither BR/EDR nor LE supported"); 1900 hci_init_done(); 1901 return; 1902 } 1903 if (!gap_ssp_supported()){ 1904 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1905 return; 1906 } 1907 break; 1908 #ifdef ENABLE_BLE 1909 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1910 // skip write le host if not supported (e.g. on LE only EM9301) 1911 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1912 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1913 return; 1914 1915 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1916 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1917 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1918 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1919 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1920 return; 1921 } 1922 // explicit fall through to reduce repetitions 1923 1924 #ifdef ENABLE_LE_CENTRAL 1925 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1926 #else 1927 hci_init_done(); 1928 #endif 1929 return; 1930 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1931 1932 #endif /* ENABLE_BLE */ 1933 1934 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1935 // skip write secure connections host support if not supported or disabled 1936 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1937 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1938 return; 1939 } 1940 break; 1941 1942 #ifdef ENABLE_SCO_OVER_HCI 1943 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1944 // skip write synchronous flow control if not supported 1945 if (hci_stack->local_supported_commands[0] & 0x04) break; 1946 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1947 1948 /* fall through */ 1949 1950 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1951 // skip write default erroneous data reporting if not supported 1952 if (hci_stack->local_supported_commands[0] & 0x08) break; 1953 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1954 1955 /* fall through */ 1956 1957 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1958 // skip bcm set sco pcm config on non-Broadcom chipsets 1959 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1960 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1961 1962 /* fall through */ 1963 1964 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1965 if (!hci_le_supported()){ 1966 // SKIP LE init for Classic only configuration 1967 hci_init_done(); 1968 return; 1969 } 1970 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1971 break; 1972 1973 #else /* !ENABLE_SCO_OVER_HCI */ 1974 1975 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1976 #ifdef ENABLE_SCO_OVER_PCM 1977 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1978 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1979 return; 1980 } 1981 #endif 1982 /* fall through */ 1983 1984 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1985 #ifdef ENABLE_BLE 1986 if (hci_le_supported()){ 1987 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1988 return; 1989 } 1990 #endif 1991 // SKIP LE init for Classic only configuration 1992 hci_init_done(); 1993 return; 1994 #endif /* ENABLE_SCO_OVER_HCI */ 1995 1996 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1997 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1998 // Response to command before init done state -> init done 1999 case (HCI_INIT_DONE-1): 2000 hci_init_done(); 2001 return; 2002 #endif 2003 2004 default: 2005 break; 2006 } 2007 hci_initializing_next_state(); 2008 } 2009 2010 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2011 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2012 bd_addr_t bd_address; 2013 (void)memcpy(&bd_address, conn->address, 6); 2014 2015 #ifdef ENABLE_CLASSIC 2016 // cache needed data 2017 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2018 #endif 2019 2020 // connection failed, remove entry 2021 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2022 btstack_memory_hci_connection_free( conn ); 2023 2024 #ifdef ENABLE_CLASSIC 2025 // notify client if dedicated bonding 2026 if (notify_dedicated_bonding_failed){ 2027 log_info("hci notify_dedicated_bonding_failed"); 2028 hci_emit_dedicated_bonding_result(bd_address, status); 2029 } 2030 2031 // if authentication error, also delete link key 2032 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2033 gap_drop_link_key_for_bd_addr(bd_address); 2034 } 2035 #else 2036 UNUSED(status); 2037 #endif 2038 } 2039 2040 #ifdef ENABLE_CLASSIC 2041 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2042 // SSP Controller 2043 if (features[6] & (1 << 3)){ 2044 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2045 } 2046 // eSCO 2047 if (features[3] & (1<<7)){ 2048 conn->remote_supported_features[0] |= 1; 2049 } 2050 // Extended features 2051 if (features[7] & (1<<7)){ 2052 conn->remote_supported_features[0] |= 2; 2053 } 2054 } 2055 2056 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2057 // SSP Host 2058 if (features[0] & (1 << 0)){ 2059 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2060 } 2061 // SC Host 2062 if (features[0] & (1 << 3)){ 2063 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2064 } 2065 } 2066 2067 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2068 // SC Controller 2069 if (features[1] & (1 << 0)){ 2070 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2071 } 2072 } 2073 2074 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2075 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2076 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2077 if (conn->bonding_flags & BONDING_DEDICATED){ 2078 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2079 } 2080 } 2081 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2082 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2083 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2084 } 2085 2086 #endif 2087 2088 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2089 // handle BT initialization 2090 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2091 hci_initializing_event_handler(packet, size); 2092 } 2093 2094 // help with BT sleep 2095 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2096 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2097 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2098 hci_initializing_next_state(); 2099 } 2100 } 2101 2102 #ifdef ENABLE_CLASSIC 2103 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2104 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2105 conn->encryption_key_size = encryption_key_size; 2106 2107 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2108 conn->requested_security_level = LEVEL_0; 2109 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2110 return; 2111 } 2112 2113 // Request Authentication if not already done 2114 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2115 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2116 } 2117 #endif 2118 2119 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2120 UNUSED(size); 2121 2122 uint16_t manufacturer; 2123 #ifdef ENABLE_CLASSIC 2124 hci_con_handle_t handle; 2125 hci_connection_t * conn; 2126 uint8_t status; 2127 #endif 2128 // get num cmd packets - limit to 1 to reduce complexity 2129 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2130 2131 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2132 switch (opcode){ 2133 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2134 if (packet[5]) break; 2135 // terminate, name 248 chars 2136 packet[6+248] = 0; 2137 log_info("local name: %s", &packet[6]); 2138 break; 2139 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2140 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2141 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2142 uint16_t acl_len = little_endian_read_16(packet, 6); 2143 uint16_t sco_len = packet[8]; 2144 2145 // determine usable ACL/SCO payload size 2146 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2147 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2148 2149 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2150 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2151 2152 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2153 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2154 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2155 } 2156 break; 2157 case HCI_OPCODE_HCI_READ_RSSI: 2158 if (packet[5] == ERROR_CODE_SUCCESS){ 2159 uint8_t event[5]; 2160 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2161 event[1] = 3; 2162 (void)memcpy(&event[2], &packet[6], 3); 2163 hci_emit_event(event, sizeof(event), 1); 2164 } 2165 break; 2166 #ifdef ENABLE_BLE 2167 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2168 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2169 hci_stack->le_acl_packets_total_num = packet[8]; 2170 // determine usable ACL payload size 2171 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2172 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2173 } 2174 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2175 break; 2176 #endif 2177 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2178 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2179 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2180 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2181 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); 2182 break; 2183 #endif 2184 #ifdef ENABLE_LE_CENTRAL 2185 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2186 hci_stack->le_whitelist_capacity = packet[6]; 2187 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2188 break; 2189 #endif 2190 case HCI_OPCODE_HCI_READ_BD_ADDR: 2191 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2192 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)); 2193 #ifdef ENABLE_CLASSIC 2194 if (hci_stack->link_key_db){ 2195 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2196 } 2197 #endif 2198 break; 2199 #ifdef ENABLE_CLASSIC 2200 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2201 hci_emit_discoverable_enabled(hci_stack->discoverable); 2202 break; 2203 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2204 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2205 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2206 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2207 hci_emit_event(event, sizeof(event), 1); 2208 } 2209 break; 2210 #endif 2211 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2212 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2213 2214 #ifdef ENABLE_CLASSIC 2215 // determine usable ACL packet types based on host buffer size and supported features 2216 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2217 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2218 #endif 2219 // Classic/LE 2220 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2221 break; 2222 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2223 manufacturer = little_endian_read_16(packet, 10); 2224 // map Cypress to Broadcom 2225 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2226 log_info("Treat Cypress as Broadcom"); 2227 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2228 little_endian_store_16(packet, 10, manufacturer); 2229 } 2230 hci_stack->manufacturer = manufacturer; 2231 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2232 break; 2233 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2234 hci_stack->local_supported_commands[0] = 2235 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2236 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2237 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2238 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2239 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2240 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2241 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2242 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2243 hci_stack->local_supported_commands[1] = 2244 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2245 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2246 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2247 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2248 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2249 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2250 break; 2251 #ifdef ENABLE_CLASSIC 2252 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2253 if (packet[5]) return; 2254 hci_stack->synchronous_flow_control_enabled = 1; 2255 break; 2256 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2257 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2258 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2259 conn = hci_connection_for_handle(handle); 2260 if (conn != NULL) { 2261 uint8_t key_size = 0; 2262 if (status == 0){ 2263 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2264 log_info("Handle %04x key Size: %u", handle, key_size); 2265 } else { 2266 key_size = 1; 2267 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2268 } 2269 hci_handle_read_encryption_key_size_complete(conn, key_size); 2270 } 2271 break; 2272 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2273 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2274 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2275 uint8_t event[67]; 2276 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2277 event[1] = 65; 2278 (void)memset(&event[2], 0, 65); 2279 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2280 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2281 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2282 event[2] = 3; 2283 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2284 } else { 2285 event[2] = 1; 2286 } 2287 } 2288 hci_emit_event(event, sizeof(event), 0); 2289 break; 2290 } 2291 #endif 2292 #endif 2293 default: 2294 break; 2295 } 2296 } 2297 2298 #ifdef ENABLE_BLE 2299 static void event_handle_le_connection_complete(const uint8_t * packet){ 2300 bd_addr_t addr; 2301 bd_addr_type_t addr_type; 2302 hci_connection_t * conn; 2303 2304 // Connection management 2305 reverse_bd_addr(&packet[8], addr); 2306 addr_type = (bd_addr_type_t)packet[7]; 2307 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2308 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2309 2310 #ifdef ENABLE_LE_CENTRAL 2311 // handle error: error is reported only to the initiator -> outgoing connection 2312 if (packet[3]){ 2313 2314 // handle cancelled outgoing connection 2315 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2316 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2317 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2318 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2319 // reset state 2320 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2321 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2322 // get outgoing connection conn struct for direct connect 2323 conn = gap_get_outgoing_connection(); 2324 } 2325 2326 // outgoing le connection establishment is done 2327 if (conn){ 2328 // remove entry 2329 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2330 btstack_memory_hci_connection_free( conn ); 2331 } 2332 return; 2333 } 2334 #endif 2335 2336 // on success, both hosts receive connection complete event 2337 if (packet[6] == HCI_ROLE_MASTER){ 2338 #ifdef ENABLE_LE_CENTRAL 2339 // if we're master on an le connection, it was an outgoing connection and we're done with it 2340 // note: no hci_connection_t object exists yet for connect with whitelist 2341 if (hci_is_le_connection_type(addr_type)){ 2342 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2343 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2344 } 2345 #endif 2346 } else { 2347 #ifdef ENABLE_LE_PERIPHERAL 2348 // if we're slave, it was an incoming connection, advertisements have stopped 2349 hci_stack->le_advertisements_active = false; 2350 #endif 2351 } 2352 2353 // LE connections are auto-accepted, so just create a connection if there isn't one already 2354 if (!conn){ 2355 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2356 } 2357 2358 // no memory, sorry. 2359 if (!conn){ 2360 return; 2361 } 2362 2363 conn->state = OPEN; 2364 conn->role = packet[6]; 2365 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2366 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2367 2368 #ifdef ENABLE_LE_PERIPHERAL 2369 if (packet[6] == HCI_ROLE_SLAVE){ 2370 hci_update_advertisements_enabled_for_current_roles(); 2371 } 2372 #endif 2373 2374 // init unenhanced att bearer mtu 2375 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2376 conn->att_connection.mtu_exchanged = false; 2377 2378 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2379 2380 // restart timer 2381 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2382 // btstack_run_loop_add_timer(&conn->timeout); 2383 2384 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2385 2386 hci_emit_nr_connections_changed(); 2387 } 2388 #endif 2389 2390 #ifdef ENABLE_CLASSIC 2391 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){ 2392 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2393 // LEVEL_4 is tested by l2cap 2394 // LEVEL 3 requires MITM protection -> check io capabilities 2395 if (level >= LEVEL_3){ 2396 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2397 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2398 if ((io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) && (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY)) return false; 2399 } 2400 // LEVEL 2 requires SSP, which is a given 2401 return true; 2402 } 2403 #endif 2404 2405 static void event_handler(uint8_t *packet, uint16_t size){ 2406 2407 uint16_t event_length = packet[1]; 2408 2409 // assert packet is complete 2410 if (size != (event_length + 2u)){ 2411 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2412 return; 2413 } 2414 2415 bd_addr_type_t addr_type; 2416 hci_con_handle_t handle; 2417 hci_connection_t * conn; 2418 int i; 2419 int create_connection_cmd; 2420 2421 #ifdef ENABLE_CLASSIC 2422 hci_link_type_t link_type; 2423 bd_addr_t addr; 2424 #endif 2425 2426 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2427 2428 switch (hci_event_packet_get_type(packet)) { 2429 2430 case HCI_EVENT_COMMAND_COMPLETE: 2431 handle_command_complete_event(packet, size); 2432 break; 2433 2434 case HCI_EVENT_COMMAND_STATUS: 2435 // get num cmd packets - limit to 1 to reduce complexity 2436 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2437 2438 // check command status to detected failed outgoing connections 2439 create_connection_cmd = 0; 2440 #ifdef ENABLE_CLASSIC 2441 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2442 create_connection_cmd = 1; 2443 } 2444 #endif 2445 #ifdef ENABLE_LE_CENTRAL 2446 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2447 create_connection_cmd = 1; 2448 } 2449 #endif 2450 if (create_connection_cmd) { 2451 uint8_t status = hci_event_command_status_get_status(packet); 2452 addr_type = hci_stack->outgoing_addr_type; 2453 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2454 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); 2455 2456 // reset outgoing address info 2457 memset(hci_stack->outgoing_addr, 0, 6); 2458 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2459 2460 // on error 2461 if (status != ERROR_CODE_SUCCESS){ 2462 #ifdef ENABLE_LE_CENTRAL 2463 if (hci_is_le_connection_type(addr_type)){ 2464 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2465 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2466 } 2467 #endif 2468 // error => outgoing connection failed 2469 if (conn != NULL){ 2470 hci_handle_connection_failed(conn, status); 2471 } 2472 } 2473 } 2474 2475 #ifdef ENABLE_CLASSIC 2476 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2477 uint8_t status = hci_event_command_status_get_status(packet); 2478 log_info("command status (inquiry), status %x", status); 2479 if (status == ERROR_CODE_SUCCESS) { 2480 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2481 } else { 2482 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2483 } 2484 } 2485 #endif 2486 break; 2487 2488 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2489 if (size < 3) return; 2490 uint16_t num_handles = packet[2]; 2491 if (size != (3u + num_handles * 4u)) return; 2492 uint16_t offset = 3; 2493 for (i=0; i<num_handles;i++){ 2494 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2495 offset += 2u; 2496 uint16_t num_packets = little_endian_read_16(packet, offset); 2497 offset += 2u; 2498 2499 conn = hci_connection_for_handle(handle); 2500 if (!conn){ 2501 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2502 continue; 2503 } 2504 2505 if (conn->num_packets_sent >= num_packets){ 2506 conn->num_packets_sent -= num_packets; 2507 } else { 2508 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2509 conn->num_packets_sent = 0; 2510 } 2511 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2512 2513 #ifdef ENABLE_CLASSIC 2514 // For SCO, we do the can_send_now_check here 2515 hci_notify_if_sco_can_send_now(); 2516 #endif 2517 } 2518 break; 2519 } 2520 2521 #ifdef ENABLE_CLASSIC 2522 case HCI_EVENT_INQUIRY_COMPLETE: 2523 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2524 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2525 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2526 hci_emit_event(event, sizeof(event), 1); 2527 } 2528 break; 2529 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2530 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2531 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2532 } 2533 break; 2534 case HCI_EVENT_CONNECTION_REQUEST: 2535 reverse_bd_addr(&packet[2], addr); 2536 link_type = (hci_link_type_t) packet[11]; 2537 if (hci_stack->gap_classic_accept_callback != NULL){ 2538 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2539 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2540 bd_addr_copy(hci_stack->decline_addr, addr); 2541 break; 2542 } 2543 } 2544 2545 // TODO: eval COD 8-10 2546 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2547 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2548 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2549 if (!conn) { 2550 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2551 } 2552 if (!conn) { 2553 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2554 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2555 bd_addr_copy(hci_stack->decline_addr, addr); 2556 break; 2557 } 2558 conn->role = HCI_ROLE_SLAVE; 2559 conn->state = RECEIVED_CONNECTION_REQUEST; 2560 // store info about eSCO 2561 if (link_type == HCI_LINK_TYPE_ESCO){ 2562 conn->remote_supported_features[0] |= 1; 2563 } 2564 hci_run(); 2565 break; 2566 2567 case HCI_EVENT_CONNECTION_COMPLETE: 2568 // Connection management 2569 reverse_bd_addr(&packet[5], addr); 2570 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2571 addr_type = BD_ADDR_TYPE_ACL; 2572 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2573 if (conn) { 2574 if (!packet[2]){ 2575 conn->state = OPEN; 2576 conn->con_handle = little_endian_read_16(packet, 3); 2577 2578 // queue get remote feature 2579 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2580 2581 // queue set supervision timeout if we're master 2582 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2583 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2584 } 2585 2586 // restart timer 2587 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2588 btstack_run_loop_add_timer(&conn->timeout); 2589 2590 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2591 2592 hci_emit_nr_connections_changed(); 2593 } else { 2594 // connection failed 2595 hci_handle_connection_failed(conn, packet[2]); 2596 } 2597 } 2598 break; 2599 2600 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2601 reverse_bd_addr(&packet[5], addr); 2602 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2603 if (packet[2]){ 2604 // connection failed 2605 break; 2606 } 2607 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2608 if (!conn) { 2609 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2610 } 2611 if (!conn) { 2612 break; 2613 } 2614 conn->state = OPEN; 2615 conn->con_handle = little_endian_read_16(packet, 3); 2616 2617 #ifdef ENABLE_SCO_OVER_HCI 2618 // update SCO 2619 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2620 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2621 } 2622 // trigger can send now 2623 if (hci_have_usb_transport()){ 2624 hci_stack->sco_can_send_now = 1; 2625 } 2626 #endif 2627 #ifdef HAVE_SCO_TRANSPORT 2628 // configure sco transport 2629 if (hci_stack->sco_transport != NULL){ 2630 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2631 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2632 } 2633 #endif 2634 break; 2635 2636 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2637 handle = little_endian_read_16(packet, 3); 2638 conn = hci_connection_for_handle(handle); 2639 if (!conn) break; 2640 if (!packet[2]){ 2641 const uint8_t * features = &packet[5]; 2642 hci_handle_remote_features_page_0(conn, features); 2643 2644 // read extended features if possible 2645 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2646 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2647 break; 2648 } 2649 } 2650 hci_handle_remote_features_received(conn); 2651 break; 2652 2653 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2654 handle = little_endian_read_16(packet, 3); 2655 conn = hci_connection_for_handle(handle); 2656 if (!conn) break; 2657 // status = ok, page = 1 2658 if (!packet[2]) { 2659 uint8_t page_number = packet[5]; 2660 uint8_t maximum_page_number = packet[6]; 2661 const uint8_t * features = &packet[7]; 2662 bool done = false; 2663 switch (page_number){ 2664 case 1: 2665 hci_handle_remote_features_page_1(conn, features); 2666 if (maximum_page_number >= 2){ 2667 // get Secure Connections (Controller) from Page 2 if available 2668 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2669 } else { 2670 // otherwise, assume SC (Controller) == SC (Host) 2671 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2672 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2673 } 2674 done = true; 2675 } 2676 break; 2677 case 2: 2678 hci_handle_remote_features_page_2(conn, features); 2679 done = true; 2680 break; 2681 default: 2682 break; 2683 } 2684 if (!done) break; 2685 } 2686 hci_handle_remote_features_received(conn); 2687 break; 2688 2689 case HCI_EVENT_LINK_KEY_REQUEST: 2690 // request handled by hci_run() 2691 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 2692 break; 2693 2694 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2695 hci_event_link_key_request_get_bd_addr(packet, addr); 2696 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2697 if (!conn) break; 2698 2699 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2700 2701 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2702 // Change Connection Encryption keeps link key type 2703 if (link_key_type != CHANGED_COMBINATION_KEY){ 2704 conn->link_key_type = link_key_type; 2705 } 2706 // cache link key. link keys stored in little-endian format for legacy reasons 2707 memcpy(&conn->link_key, &packet[8], 16); 2708 2709 // only store link key: 2710 // - if bondable enabled 2711 if (hci_stack->bondable == false) break; 2712 // - if security level sufficient 2713 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2714 // - for SSP, also check if remote side requested bonding as well 2715 if (conn->link_key_type != COMBINATION_KEY){ 2716 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2717 if (!remote_bonding){ 2718 break; 2719 } 2720 } 2721 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2722 break; 2723 } 2724 2725 case HCI_EVENT_PIN_CODE_REQUEST: 2726 hci_event_pin_code_request_get_bd_addr(packet, addr); 2727 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2728 if (!conn) break; 2729 2730 hci_pairing_started(conn, false); 2731 // abort pairing if: non-bondable mode (event is not forwarded to app) 2732 if (!hci_stack->bondable ){ 2733 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2734 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2735 hci_run(); 2736 return; 2737 } 2738 // abort pairing if: Secure Connections Only mode (event is not forwarded to app) 2739 if (hci_stack->gap_secure_connections_only_mode){ 2740 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2741 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2742 hci_run(); 2743 return; 2744 } 2745 break; 2746 2747 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2748 hci_event_io_capability_response_get_bd_addr(packet, addr); 2749 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2750 if (!conn) break; 2751 2752 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2753 hci_pairing_started(conn, true); 2754 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2755 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2756 break; 2757 2758 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2759 hci_event_io_capability_response_get_bd_addr(packet, addr); 2760 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2761 if (!conn) break; 2762 2763 hci_connection_timestamp(conn); 2764 2765 hci_pairing_started(conn, true); 2766 2767 // assess security 2768 if ((hci_stack->gap_secure_connections_only_mode || (conn->requested_security_level == LEVEL_4)) && !hci_remote_sc_enabled(conn)){ 2769 log_info("Level 4 required, but SC not supported -> abort"); 2770 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2771 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2772 break; 2773 } 2774 2775 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2776 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2777 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2778 } else { 2779 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2780 } 2781 #endif 2782 break; 2783 2784 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2785 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2786 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2787 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_REMOTE_OOB_DATA_REPLY); 2788 break; 2789 #endif 2790 2791 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2792 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2793 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2794 if (!conn) break; 2795 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2796 if (hci_stack->ssp_auto_accept){ 2797 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2798 }; 2799 } else { 2800 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2801 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2802 // don't forward event to app 2803 hci_run(); 2804 return; 2805 } 2806 break; 2807 2808 case HCI_EVENT_USER_PASSKEY_REQUEST: 2809 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2810 if (hci_stack->ssp_auto_accept){ 2811 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2812 }; 2813 break; 2814 2815 case HCI_EVENT_MODE_CHANGE: 2816 handle = hci_event_mode_change_get_handle(packet); 2817 conn = hci_connection_for_handle(handle); 2818 if (!conn) break; 2819 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2820 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2821 break; 2822 #endif 2823 2824 case HCI_EVENT_ENCRYPTION_CHANGE: 2825 handle = hci_event_encryption_change_get_connection_handle(packet); 2826 conn = hci_connection_for_handle(handle); 2827 if (!conn) break; 2828 if (hci_event_encryption_change_get_status(packet) == 0u) { 2829 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2830 if (encryption_enabled){ 2831 if (hci_is_le_connection(conn)){ 2832 // For LE, we accept connection as encrypted 2833 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2834 } 2835 #ifdef ENABLE_CLASSIC 2836 else { 2837 2838 // dedicated bonding: send result and disconnect 2839 if (conn->bonding_flags & BONDING_DEDICATED){ 2840 conn->bonding_flags &= ~BONDING_DEDICATED; 2841 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2842 conn->bonding_status = packet[2]; 2843 break; 2844 } 2845 2846 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2847 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2848 bool connected_uses_aes_ccm = encryption_enabled == 2; 2849 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2850 log_info("SC during pairing, but only E0 now -> abort"); 2851 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2852 break; 2853 } 2854 2855 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2856 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2857 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2858 } else { 2859 // if not, pretend everything is perfect 2860 hci_handle_read_encryption_key_size_complete(conn, 16); 2861 } 2862 } 2863 #endif 2864 } else { 2865 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 2866 } 2867 } 2868 2869 break; 2870 2871 #ifdef ENABLE_CLASSIC 2872 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2873 handle = hci_event_authentication_complete_get_connection_handle(packet); 2874 conn = hci_connection_for_handle(handle); 2875 if (!conn) break; 2876 2877 // clear authentication active flag 2878 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 2879 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 2880 2881 // authenticated only if auth status == 0 2882 if (hci_event_authentication_complete_get_status(packet) == 0){ 2883 // authenticated 2884 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2885 2886 // If not already encrypted, start encryption 2887 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 2888 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2889 break; 2890 } 2891 } 2892 2893 // emit updated security level 2894 conn->requested_security_level = LEVEL_0; 2895 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2896 break; 2897 2898 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 2899 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 2900 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2901 if (!conn) break; 2902 2903 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 2904 break; 2905 #endif 2906 2907 // HCI_EVENT_DISCONNECTION_COMPLETE 2908 // has been split, to first notify stack before shutting connection down 2909 // see end of function, too. 2910 case HCI_EVENT_DISCONNECTION_COMPLETE: 2911 if (packet[2]) break; // status != 0 2912 handle = little_endian_read_16(packet, 3); 2913 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2914 if (hci_stack->acl_fragmentation_total_size > 0u) { 2915 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2916 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2917 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2918 hci_stack->acl_fragmentation_total_size = 0; 2919 hci_stack->acl_fragmentation_pos = 0; 2920 if (release_buffer){ 2921 hci_release_packet_buffer(); 2922 } 2923 } 2924 } 2925 2926 conn = hci_connection_for_handle(handle); 2927 if (!conn) break; 2928 #ifdef ENABLE_CLASSIC 2929 // pairing failed if it was ongoing 2930 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 2931 #endif 2932 // mark connection for shutdown 2933 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2934 2935 // emit dedicatd bonding event 2936 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2937 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2938 } 2939 2940 #ifdef ENABLE_BLE 2941 #ifdef ENABLE_LE_PERIPHERAL 2942 // re-enable advertisements for le connections if active 2943 if (hci_is_le_connection(conn)){ 2944 hci_update_advertisements_enabled_for_current_roles(); 2945 } 2946 #endif 2947 #endif 2948 break; 2949 2950 case HCI_EVENT_HARDWARE_ERROR: 2951 log_error("Hardware Error: 0x%02x", packet[2]); 2952 if (hci_stack->hardware_error_callback){ 2953 (*hci_stack->hardware_error_callback)(packet[2]); 2954 } else { 2955 // if no special requests, just reboot stack 2956 hci_power_control_off(); 2957 hci_power_control_on(); 2958 } 2959 break; 2960 2961 #ifdef ENABLE_CLASSIC 2962 case HCI_EVENT_ROLE_CHANGE: 2963 if (packet[2]) break; // status != 0 2964 reverse_bd_addr(&packet[3], addr); 2965 addr_type = BD_ADDR_TYPE_ACL; 2966 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2967 if (!conn) break; 2968 conn->role = packet[9]; 2969 break; 2970 #endif 2971 2972 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2973 // release packet buffer only for asynchronous transport and if there are not further fragements 2974 if (hci_transport_synchronous()) { 2975 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2976 return; // instead of break: to avoid re-entering hci_run() 2977 } 2978 hci_stack->acl_fragmentation_tx_active = 0; 2979 if (hci_stack->acl_fragmentation_total_size) break; 2980 hci_release_packet_buffer(); 2981 2982 // L2CAP receives this event via the hci_emit_event below 2983 2984 #ifdef ENABLE_CLASSIC 2985 // For SCO, we do the can_send_now_check here 2986 hci_notify_if_sco_can_send_now(); 2987 #endif 2988 break; 2989 2990 #ifdef ENABLE_CLASSIC 2991 case HCI_EVENT_SCO_CAN_SEND_NOW: 2992 // For SCO, we do the can_send_now_check here 2993 hci_stack->sco_can_send_now = 1; 2994 hci_notify_if_sco_can_send_now(); 2995 return; 2996 2997 // explode inquriy results for easier consumption 2998 case HCI_EVENT_INQUIRY_RESULT: 2999 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3000 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3001 gap_inquiry_explode(packet, size); 3002 break; 3003 #endif 3004 3005 #ifdef ENABLE_BLE 3006 case HCI_EVENT_LE_META: 3007 switch (packet[2]){ 3008 #ifdef ENABLE_LE_CENTRAL 3009 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3010 // log_info("advertising report received"); 3011 if (!hci_stack->le_scanning_enabled) break; 3012 le_handle_advertisement_report(packet, size); 3013 break; 3014 #endif 3015 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3016 event_handle_le_connection_complete(packet); 3017 break; 3018 3019 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3020 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3021 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3022 conn = hci_connection_for_handle(handle); 3023 if (!conn) break; 3024 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3025 break; 3026 3027 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3028 // connection 3029 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3030 conn = hci_connection_for_handle(handle); 3031 if (conn) { 3032 // read arguments 3033 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3034 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3035 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3036 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3037 3038 // validate against current connection parameter range 3039 le_connection_parameter_range_t existing_range; 3040 gap_get_connection_parameter_range(&existing_range); 3041 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3042 if (update_parameter){ 3043 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3044 conn->le_conn_interval_min = le_conn_interval_min; 3045 conn->le_conn_interval_max = le_conn_interval_max; 3046 conn->le_conn_latency = le_conn_latency; 3047 conn->le_supervision_timeout = le_supervision_timeout; 3048 } else { 3049 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3050 } 3051 } 3052 break; 3053 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3054 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3055 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3056 conn = hci_connection_for_handle(handle); 3057 if (conn) { 3058 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3059 } 3060 break; 3061 #endif 3062 default: 3063 break; 3064 } 3065 break; 3066 #endif 3067 case HCI_EVENT_VENDOR_SPECIFIC: 3068 // Vendor specific commands often create vendor specific event instead of num completed packets 3069 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3070 switch (hci_stack->manufacturer){ 3071 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3072 hci_stack->num_cmd_packets = 1; 3073 break; 3074 default: 3075 break; 3076 } 3077 break; 3078 default: 3079 break; 3080 } 3081 3082 handle_event_for_current_stack_state(packet, size); 3083 3084 // notify upper stack 3085 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3086 3087 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3088 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3089 handle = little_endian_read_16(packet, 3); 3090 hci_connection_t * aConn = hci_connection_for_handle(handle); 3091 // discard connection if app did not trigger a reconnect in the event handler 3092 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3093 hci_shutdown_connection(aConn); 3094 } 3095 } 3096 3097 // execute main loop 3098 hci_run(); 3099 } 3100 3101 #ifdef ENABLE_CLASSIC 3102 3103 #ifdef ENABLE_SCO_OVER_HCI 3104 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3105 static void sco_schedule_tx(hci_connection_t * conn); 3106 3107 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3108 log_debug("SCO TX Timeout"); 3109 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3110 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3111 if (!conn) return; 3112 3113 // trigger send 3114 conn->sco_tx_ready = 1; 3115 // extra packet if CVSD but SCO buffer is too short 3116 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3117 conn->sco_tx_ready++; 3118 } 3119 hci_notify_if_sco_can_send_now(); 3120 } 3121 3122 3123 #define SCO_TX_AFTER_RX_MS (6) 3124 3125 static void sco_schedule_tx(hci_connection_t * conn){ 3126 3127 uint32_t now = btstack_run_loop_get_time_ms(); 3128 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3129 int time_delta_ms = sco_tx_ms - now; 3130 3131 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3132 3133 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3134 btstack_run_loop_set_timer(timer, time_delta_ms); 3135 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3136 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3137 btstack_run_loop_add_timer(timer); 3138 } 3139 #endif 3140 3141 static void sco_handler(uint8_t * packet, uint16_t size){ 3142 // lookup connection struct 3143 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3144 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3145 if (!conn) return; 3146 3147 #ifdef ENABLE_SCO_OVER_HCI 3148 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3149 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3150 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3151 packet[2] = 0x3c; 3152 memmove(&packet[3], &packet[23], 63); 3153 size = 63; 3154 } 3155 } 3156 3157 if (hci_have_usb_transport()){ 3158 // Nothing to do 3159 } else { 3160 // 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); 3161 if (hci_stack->synchronous_flow_control_enabled == 0){ 3162 uint32_t now = btstack_run_loop_get_time_ms(); 3163 3164 if (!conn->sco_rx_valid){ 3165 // ignore first 10 packets 3166 conn->sco_rx_count++; 3167 // log_debug("sco rx count %u", conn->sco_rx_count); 3168 if (conn->sco_rx_count == 10) { 3169 // use first timestamp as is and pretent it just started 3170 conn->sco_rx_ms = now; 3171 conn->sco_rx_valid = 1; 3172 conn->sco_rx_count = 0; 3173 sco_schedule_tx(conn); 3174 } 3175 } else { 3176 // track expected arrival timme 3177 conn->sco_rx_count++; 3178 conn->sco_rx_ms += 7; 3179 int delta = (int32_t) (now - conn->sco_rx_ms); 3180 if (delta > 0){ 3181 conn->sco_rx_ms++; 3182 } 3183 // log_debug("sco rx %u", conn->sco_rx_ms); 3184 sco_schedule_tx(conn); 3185 } 3186 } 3187 } 3188 #endif 3189 3190 // deliver to app 3191 if (hci_stack->sco_packet_handler) { 3192 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3193 } 3194 3195 #ifdef HAVE_SCO_TRANSPORT 3196 // We can send one packet for each received packet 3197 conn->sco_tx_ready++; 3198 hci_notify_if_sco_can_send_now(); 3199 #endif 3200 3201 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3202 conn->num_packets_completed++; 3203 hci_stack->host_completed_packets = 1; 3204 hci_run(); 3205 #endif 3206 } 3207 #endif 3208 3209 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3210 hci_dump_packet(packet_type, 1, packet, size); 3211 switch (packet_type) { 3212 case HCI_EVENT_PACKET: 3213 event_handler(packet, size); 3214 break; 3215 case HCI_ACL_DATA_PACKET: 3216 acl_handler(packet, size); 3217 break; 3218 #ifdef ENABLE_CLASSIC 3219 case HCI_SCO_DATA_PACKET: 3220 sco_handler(packet, size); 3221 break; 3222 #endif 3223 default: 3224 break; 3225 } 3226 } 3227 3228 /** 3229 * @brief Add event packet handler. 3230 */ 3231 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3232 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3233 } 3234 3235 3236 /** Register HCI packet handlers */ 3237 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3238 hci_stack->acl_packet_handler = handler; 3239 } 3240 3241 #ifdef ENABLE_CLASSIC 3242 /** 3243 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3244 */ 3245 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3246 hci_stack->sco_packet_handler = handler; 3247 } 3248 #endif 3249 3250 static void hci_state_reset(void){ 3251 // no connections yet 3252 hci_stack->connections = NULL; 3253 3254 // keep discoverable/connectable as this has been requested by the client(s) 3255 // hci_stack->discoverable = 0; 3256 // hci_stack->connectable = 0; 3257 // hci_stack->bondable = 1; 3258 // hci_stack->own_addr_type = 0; 3259 3260 // buffer is free 3261 hci_stack->hci_packet_buffer_reserved = 0; 3262 3263 // no pending cmds 3264 hci_stack->decline_reason = 0; 3265 hci_stack->new_scan_enable_value = 0xff; 3266 3267 hci_stack->secure_connections_active = false; 3268 3269 #ifdef ENABLE_CLASSIC 3270 hci_stack->new_page_scan_interval = 0xffff; 3271 hci_stack->new_page_scan_window = 0xffff; 3272 hci_stack->new_page_scan_type = 0xff; 3273 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3274 #endif 3275 3276 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3277 hci_stack->classic_read_local_oob_data = true; 3278 #endif 3279 3280 // LE 3281 #ifdef ENABLE_BLE 3282 memset(hci_stack->le_random_address, 0, 6); 3283 hci_stack->le_random_address_set = 0; 3284 #endif 3285 #ifdef ENABLE_LE_CENTRAL 3286 hci_stack->le_scanning_active = false; 3287 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3288 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3289 hci_stack->le_whitelist_capacity = 0; 3290 #endif 3291 #ifdef ENABLE_LE_PERIPHERAL 3292 hci_stack->le_advertisements_active = false; 3293 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3294 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3295 } 3296 if (hci_stack->le_advertisements_data != NULL){ 3297 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3298 } 3299 #endif 3300 } 3301 3302 #ifdef ENABLE_CLASSIC 3303 /** 3304 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3305 */ 3306 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3307 // store and open remote device db 3308 hci_stack->link_key_db = link_key_db; 3309 if (hci_stack->link_key_db) { 3310 hci_stack->link_key_db->open(); 3311 } 3312 } 3313 #endif 3314 3315 void hci_init(const hci_transport_t *transport, const void *config){ 3316 3317 #ifdef HAVE_MALLOC 3318 if (!hci_stack) { 3319 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3320 } 3321 #else 3322 hci_stack = &hci_stack_static; 3323 #endif 3324 memset(hci_stack, 0, sizeof(hci_stack_t)); 3325 3326 // reference to use transport layer implementation 3327 hci_stack->hci_transport = transport; 3328 3329 // reference to used config 3330 hci_stack->config = config; 3331 3332 // setup pointer for outgoing packet buffer 3333 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3334 3335 // max acl payload size defined in config.h 3336 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3337 3338 // register packet handlers with transport 3339 transport->register_packet_handler(&packet_handler); 3340 3341 hci_stack->state = HCI_STATE_OFF; 3342 3343 // class of device 3344 hci_stack->class_of_device = 0x007a020c; // Smartphone 3345 3346 // bondable by default 3347 hci_stack->bondable = 1; 3348 3349 #ifdef ENABLE_CLASSIC 3350 // classic name 3351 hci_stack->local_name = default_classic_name; 3352 3353 // Master slave policy 3354 hci_stack->master_slave_policy = 1; 3355 3356 // Allow Role Switch 3357 hci_stack->allow_role_switch = 1; 3358 3359 // Default / minimum security level = 2 3360 hci_stack->gap_security_level = LEVEL_2; 3361 3362 // Default Security Mode 4 3363 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3364 3365 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3366 hci_stack->gap_required_encyrption_key_size = 7; 3367 3368 // Link Supervision Timeout 3369 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3370 3371 #endif 3372 3373 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3374 hci_stack->ssp_enable = 1; 3375 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3376 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3377 hci_stack->ssp_auto_accept = 1; 3378 3379 // Secure Connections: enable (requires support from Controller) 3380 hci_stack->secure_connections_enable = true; 3381 3382 // voice setting - signed 16 bit pcm data with CVSD over the air 3383 hci_stack->sco_voice_setting = 0x60; 3384 3385 #ifdef ENABLE_LE_CENTRAL 3386 // connection parameter to use for outgoing connections 3387 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3388 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3389 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3390 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3391 hci_stack->le_connection_latency = 4; // 4 3392 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3393 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3394 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3395 3396 // default LE Scanning 3397 hci_stack->le_scan_type = 0x1; // active 3398 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3399 hci_stack->le_scan_window = 0x30; // 30 ms 3400 #endif 3401 3402 #ifdef ENABLE_LE_PERIPHERAL 3403 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3404 #endif 3405 3406 // connection parameter range used to answer connection parameter update requests in l2cap 3407 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3408 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3409 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3410 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3411 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3412 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3413 3414 hci_state_reset(); 3415 } 3416 3417 void hci_deinit(void){ 3418 #ifdef HAVE_MALLOC 3419 if (hci_stack) { 3420 free(hci_stack); 3421 } 3422 #endif 3423 hci_stack = NULL; 3424 3425 #ifdef ENABLE_CLASSIC 3426 disable_l2cap_timeouts = 0; 3427 #endif 3428 } 3429 3430 /** 3431 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3432 */ 3433 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3434 hci_stack->chipset = chipset_driver; 3435 3436 // reset chipset driver - init is also called on power_up 3437 if (hci_stack->chipset && hci_stack->chipset->init){ 3438 hci_stack->chipset->init(hci_stack->config); 3439 } 3440 } 3441 3442 /** 3443 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3444 */ 3445 void hci_set_control(const btstack_control_t *hardware_control){ 3446 // references to used control implementation 3447 hci_stack->control = hardware_control; 3448 // init with transport config 3449 hardware_control->init(hci_stack->config); 3450 } 3451 3452 void hci_close(void){ 3453 3454 #ifdef ENABLE_CLASSIC 3455 // close remote device db 3456 if (hci_stack->link_key_db) { 3457 hci_stack->link_key_db->close(); 3458 } 3459 #endif 3460 3461 btstack_linked_list_iterator_t lit; 3462 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3463 while (btstack_linked_list_iterator_has_next(&lit)){ 3464 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3465 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3466 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3467 hci_shutdown_connection(connection); 3468 } 3469 3470 hci_power_control(HCI_POWER_OFF); 3471 3472 #ifdef HAVE_MALLOC 3473 free(hci_stack); 3474 #endif 3475 hci_stack = NULL; 3476 } 3477 3478 #ifdef HAVE_SCO_TRANSPORT 3479 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3480 hci_stack->sco_transport = sco_transport; 3481 sco_transport->register_packet_handler(&packet_handler); 3482 } 3483 #endif 3484 3485 #ifdef ENABLE_CLASSIC 3486 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3487 // validate ranage and set 3488 if (encryption_key_size < 7) return; 3489 if (encryption_key_size > 16) return; 3490 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3491 } 3492 3493 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3494 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3495 hci_stack->gap_security_mode = security_mode; 3496 return ERROR_CODE_SUCCESS; 3497 } else { 3498 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3499 } 3500 } 3501 3502 gap_security_mode_t gap_get_security_mode(void){ 3503 return hci_stack->gap_security_mode; 3504 } 3505 3506 void gap_set_security_level(gap_security_level_t security_level){ 3507 hci_stack->gap_security_level = security_level; 3508 } 3509 3510 gap_security_level_t gap_get_security_level(void){ 3511 if (hci_stack->gap_secure_connections_only_mode){ 3512 return LEVEL_4; 3513 } 3514 return hci_stack->gap_security_level; 3515 } 3516 3517 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3518 hci_stack->gap_minimal_service_security_level = security_level; 3519 } 3520 3521 void gap_set_secure_connections_only_mode(bool enable){ 3522 hci_stack->gap_secure_connections_only_mode = enable; 3523 } 3524 3525 bool gap_get_secure_connections_only_mode(void){ 3526 return hci_stack->gap_secure_connections_only_mode; 3527 } 3528 #endif 3529 3530 #ifdef ENABLE_CLASSIC 3531 void gap_set_class_of_device(uint32_t class_of_device){ 3532 hci_stack->class_of_device = class_of_device; 3533 } 3534 3535 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3536 hci_stack->default_link_policy_settings = default_link_policy_settings; 3537 } 3538 3539 void gap_set_allow_role_switch(bool allow_role_switch){ 3540 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3541 } 3542 3543 uint8_t hci_get_allow_role_switch(void){ 3544 return hci_stack->allow_role_switch; 3545 } 3546 3547 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3548 hci_stack->link_supervision_timeout = link_supervision_timeout; 3549 } 3550 3551 void hci_disable_l2cap_timeout_check(void){ 3552 disable_l2cap_timeouts = 1; 3553 } 3554 #endif 3555 3556 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3557 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3558 void hci_set_bd_addr(bd_addr_t addr){ 3559 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3560 hci_stack->custom_bd_addr_set = 1; 3561 } 3562 #endif 3563 3564 // State-Module-Driver overview 3565 // state module low-level 3566 // HCI_STATE_OFF off close 3567 // HCI_STATE_INITIALIZING, on open 3568 // HCI_STATE_WORKING, on open 3569 // HCI_STATE_HALTING, on open 3570 // HCI_STATE_SLEEPING, off/sleep close 3571 // HCI_STATE_FALLING_ASLEEP on open 3572 3573 static int hci_power_control_on(void){ 3574 3575 // power on 3576 int err = 0; 3577 if (hci_stack->control && hci_stack->control->on){ 3578 err = (*hci_stack->control->on)(); 3579 } 3580 if (err){ 3581 log_error( "POWER_ON failed"); 3582 hci_emit_hci_open_failed(); 3583 return err; 3584 } 3585 3586 // int chipset driver 3587 if (hci_stack->chipset && hci_stack->chipset->init){ 3588 hci_stack->chipset->init(hci_stack->config); 3589 } 3590 3591 // init transport 3592 if (hci_stack->hci_transport->init){ 3593 hci_stack->hci_transport->init(hci_stack->config); 3594 } 3595 3596 // open transport 3597 err = hci_stack->hci_transport->open(); 3598 if (err){ 3599 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3600 if (hci_stack->control && hci_stack->control->off){ 3601 (*hci_stack->control->off)(); 3602 } 3603 hci_emit_hci_open_failed(); 3604 return err; 3605 } 3606 return 0; 3607 } 3608 3609 static void hci_power_control_off(void){ 3610 3611 log_info("hci_power_control_off"); 3612 3613 // close low-level device 3614 hci_stack->hci_transport->close(); 3615 3616 log_info("hci_power_control_off - hci_transport closed"); 3617 3618 // power off 3619 if (hci_stack->control && hci_stack->control->off){ 3620 (*hci_stack->control->off)(); 3621 } 3622 3623 log_info("hci_power_control_off - control closed"); 3624 3625 hci_stack->state = HCI_STATE_OFF; 3626 } 3627 3628 static void hci_power_control_sleep(void){ 3629 3630 log_info("hci_power_control_sleep"); 3631 3632 #if 0 3633 // don't close serial port during sleep 3634 3635 // close low-level device 3636 hci_stack->hci_transport->close(hci_stack->config); 3637 #endif 3638 3639 // sleep mode 3640 if (hci_stack->control && hci_stack->control->sleep){ 3641 (*hci_stack->control->sleep)(); 3642 } 3643 3644 hci_stack->state = HCI_STATE_SLEEPING; 3645 } 3646 3647 static int hci_power_control_wake(void){ 3648 3649 log_info("hci_power_control_wake"); 3650 3651 // wake on 3652 if (hci_stack->control && hci_stack->control->wake){ 3653 (*hci_stack->control->wake)(); 3654 } 3655 3656 #if 0 3657 // open low-level device 3658 int err = hci_stack->hci_transport->open(hci_stack->config); 3659 if (err){ 3660 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3661 if (hci_stack->control && hci_stack->control->off){ 3662 (*hci_stack->control->off)(); 3663 } 3664 hci_emit_hci_open_failed(); 3665 return err; 3666 } 3667 #endif 3668 3669 return 0; 3670 } 3671 3672 static void hci_power_transition_to_initializing(void){ 3673 // set up state machine 3674 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3675 hci_stack->hci_packet_buffer_reserved = 0; 3676 hci_stack->state = HCI_STATE_INITIALIZING; 3677 hci_stack->substate = HCI_INIT_SEND_RESET; 3678 } 3679 3680 // returns error 3681 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3682 int err; 3683 switch (power_mode){ 3684 case HCI_POWER_ON: 3685 err = hci_power_control_on(); 3686 if (err != 0) { 3687 log_error("hci_power_control_on() error %d", err); 3688 return err; 3689 } 3690 hci_power_transition_to_initializing(); 3691 break; 3692 case HCI_POWER_OFF: 3693 // do nothing 3694 break; 3695 case HCI_POWER_SLEEP: 3696 // do nothing (with SLEEP == OFF) 3697 break; 3698 default: 3699 btstack_assert(false); 3700 break; 3701 } 3702 return ERROR_CODE_SUCCESS; 3703 } 3704 3705 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3706 switch (power_mode){ 3707 case HCI_POWER_ON: 3708 // do nothing 3709 break; 3710 case HCI_POWER_OFF: 3711 // no connections yet, just turn it off 3712 hci_power_control_off(); 3713 break; 3714 case HCI_POWER_SLEEP: 3715 // no connections yet, just turn it off 3716 hci_power_control_sleep(); 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_working(HCI_POWER_MODE power_mode) { 3726 switch (power_mode){ 3727 case HCI_POWER_ON: 3728 // do nothing 3729 break; 3730 case HCI_POWER_OFF: 3731 // see hci_run 3732 hci_stack->state = HCI_STATE_HALTING; 3733 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3734 break; 3735 case HCI_POWER_SLEEP: 3736 // see hci_run 3737 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3738 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3739 break; 3740 default: 3741 btstack_assert(false); 3742 break; 3743 } 3744 return ERROR_CODE_SUCCESS; 3745 } 3746 3747 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3748 switch (power_mode){ 3749 case HCI_POWER_ON: 3750 hci_power_transition_to_initializing(); 3751 break; 3752 case HCI_POWER_OFF: 3753 // do nothing 3754 break; 3755 case HCI_POWER_SLEEP: 3756 // see hci_run 3757 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3758 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3759 break; 3760 default: 3761 btstack_assert(false); 3762 break; 3763 } 3764 return ERROR_CODE_SUCCESS; 3765 } 3766 3767 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3768 switch (power_mode){ 3769 case HCI_POWER_ON: 3770 3771 #ifdef HAVE_PLATFORM_IPHONE_OS 3772 // nothing to do, if H4 supports power management 3773 if (btstack_control_iphone_power_management_enabled()){ 3774 hci_stack->state = HCI_STATE_INITIALIZING; 3775 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3776 break; 3777 } 3778 #endif 3779 hci_power_transition_to_initializing(); 3780 break; 3781 case HCI_POWER_OFF: 3782 // see hci_run 3783 hci_stack->state = HCI_STATE_HALTING; 3784 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3785 break; 3786 case HCI_POWER_SLEEP: 3787 // do nothing 3788 break; 3789 default: 3790 btstack_assert(false); 3791 break; 3792 } 3793 return ERROR_CODE_SUCCESS; 3794 } 3795 3796 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3797 int err; 3798 switch (power_mode){ 3799 case HCI_POWER_ON: 3800 #ifdef HAVE_PLATFORM_IPHONE_OS 3801 // nothing to do, if H4 supports power management 3802 if (btstack_control_iphone_power_management_enabled()){ 3803 hci_stack->state = HCI_STATE_INITIALIZING; 3804 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3805 hci_update_scan_enable(); 3806 break; 3807 } 3808 #endif 3809 err = hci_power_control_wake(); 3810 if (err) return err; 3811 hci_power_transition_to_initializing(); 3812 break; 3813 case HCI_POWER_OFF: 3814 hci_stack->state = HCI_STATE_HALTING; 3815 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3816 break; 3817 case HCI_POWER_SLEEP: 3818 // do nothing 3819 break; 3820 default: 3821 btstack_assert(false); 3822 break; 3823 } 3824 return ERROR_CODE_SUCCESS; 3825 } 3826 3827 int hci_power_control(HCI_POWER_MODE power_mode){ 3828 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3829 int err = 0; 3830 switch (hci_stack->state){ 3831 case HCI_STATE_OFF: 3832 err = hci_power_control_state_off(power_mode); 3833 break; 3834 case HCI_STATE_INITIALIZING: 3835 err = hci_power_control_state_initializing(power_mode); 3836 break; 3837 case HCI_STATE_WORKING: 3838 err = hci_power_control_state_working(power_mode); 3839 break; 3840 case HCI_STATE_HALTING: 3841 err = hci_power_control_state_halting(power_mode); 3842 break; 3843 case HCI_STATE_FALLING_ASLEEP: 3844 err = hci_power_control_state_falling_asleep(power_mode); 3845 break; 3846 case HCI_STATE_SLEEPING: 3847 err = hci_power_control_state_sleeping(power_mode); 3848 break; 3849 default: 3850 btstack_assert(false); 3851 break; 3852 } 3853 if (err != 0){ 3854 return err; 3855 } 3856 3857 // create internal event 3858 hci_emit_state(); 3859 3860 // trigger next/first action 3861 hci_run(); 3862 3863 return 0; 3864 } 3865 3866 3867 #ifdef ENABLE_CLASSIC 3868 3869 static void hci_update_scan_enable(void){ 3870 // 2 = page scan, 1 = inq scan 3871 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3872 hci_run(); 3873 } 3874 3875 void gap_discoverable_control(uint8_t enable){ 3876 if (enable) enable = 1; // normalize argument 3877 3878 if (hci_stack->discoverable == enable){ 3879 hci_emit_discoverable_enabled(hci_stack->discoverable); 3880 return; 3881 } 3882 3883 hci_stack->discoverable = enable; 3884 hci_update_scan_enable(); 3885 } 3886 3887 void gap_connectable_control(uint8_t enable){ 3888 if (enable) enable = 1; // normalize argument 3889 3890 // don't emit event 3891 if (hci_stack->connectable == enable) return; 3892 3893 hci_stack->connectable = enable; 3894 hci_update_scan_enable(); 3895 } 3896 #endif 3897 3898 void gap_local_bd_addr(bd_addr_t address_buffer){ 3899 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3900 } 3901 3902 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3903 static void hci_host_num_completed_packets(void){ 3904 3905 // create packet manually as arrays are not supported and num_commands should not get reduced 3906 hci_reserve_packet_buffer(); 3907 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3908 3909 uint16_t size = 0; 3910 uint16_t num_handles = 0; 3911 packet[size++] = 0x35; 3912 packet[size++] = 0x0c; 3913 size++; // skip param len 3914 size++; // skip num handles 3915 3916 // add { handle, packets } entries 3917 btstack_linked_item_t * it; 3918 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3919 hci_connection_t * connection = (hci_connection_t *) it; 3920 if (connection->num_packets_completed){ 3921 little_endian_store_16(packet, size, connection->con_handle); 3922 size += 2; 3923 little_endian_store_16(packet, size, connection->num_packets_completed); 3924 size += 2; 3925 // 3926 num_handles++; 3927 connection->num_packets_completed = 0; 3928 } 3929 } 3930 3931 packet[2] = size - 3; 3932 packet[3] = num_handles; 3933 3934 hci_stack->host_completed_packets = 0; 3935 3936 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3937 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3938 3939 // release packet buffer for synchronous transport implementations 3940 if (hci_transport_synchronous()){ 3941 hci_release_packet_buffer(); 3942 hci_emit_transport_packet_sent(); 3943 } 3944 } 3945 #endif 3946 3947 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3948 UNUSED(ds); 3949 hci_stack->substate = HCI_HALTING_CLOSE; 3950 // allow packet handlers to defer final shutdown 3951 hci_emit_state(); 3952 hci_run(); 3953 } 3954 3955 static bool hci_run_acl_fragments(void){ 3956 if (hci_stack->acl_fragmentation_total_size > 0u) { 3957 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3958 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3959 if (connection) { 3960 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3961 hci_send_acl_packet_fragments(connection); 3962 return true; 3963 } 3964 } else { 3965 // connection gone -> discard further fragments 3966 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3967 hci_stack->acl_fragmentation_total_size = 0; 3968 hci_stack->acl_fragmentation_pos = 0; 3969 } 3970 } 3971 return false; 3972 } 3973 3974 #ifdef ENABLE_CLASSIC 3975 static bool hci_run_general_gap_classic(void){ 3976 3977 // decline incoming connections 3978 if (hci_stack->decline_reason){ 3979 uint8_t reason = hci_stack->decline_reason; 3980 hci_stack->decline_reason = 0; 3981 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3982 return true; 3983 } 3984 // write page scan activity 3985 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_interval != 0xffff) && hci_classic_supported()){ 3986 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 3987 hci_stack->new_page_scan_interval = 0xffff; 3988 hci_stack->new_page_scan_window = 0xffff; 3989 return true; 3990 } 3991 // write page scan type 3992 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_type != 0xff) && hci_classic_supported()){ 3993 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 3994 hci_stack->new_page_scan_type = 0xff; 3995 return true; 3996 } 3997 // send scan enable 3998 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3999 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 4000 hci_stack->new_scan_enable_value = 0xff; 4001 return true; 4002 } 4003 // start/stop inquiry 4004 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4005 uint8_t duration = hci_stack->inquiry_state; 4006 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4007 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4008 return true; 4009 } 4010 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4011 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4012 hci_send_cmd(&hci_inquiry_cancel); 4013 return true; 4014 } 4015 // remote name request 4016 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4017 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4018 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4019 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4020 return true; 4021 } 4022 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4023 // Local OOB data 4024 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 4025 hci_stack->classic_read_local_oob_data = false; 4026 if (hci_stack->local_supported_commands[1] & 0x10u){ 4027 hci_send_cmd(&hci_read_local_extended_oob_data); 4028 } else { 4029 hci_send_cmd(&hci_read_local_oob_data); 4030 } 4031 } 4032 #endif 4033 // pairing 4034 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4035 uint8_t state = hci_stack->gap_pairing_state; 4036 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4037 uint8_t pin_code[16]; 4038 switch (state){ 4039 case GAP_PAIRING_STATE_SEND_PIN: 4040 memset(pin_code, 0, 16); 4041 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4042 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4043 break; 4044 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4045 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4046 break; 4047 case GAP_PAIRING_STATE_SEND_PASSKEY: 4048 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4049 break; 4050 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4051 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4052 break; 4053 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4054 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4055 break; 4056 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4057 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4058 break; 4059 default: 4060 break; 4061 } 4062 return true; 4063 } 4064 return false; 4065 } 4066 #endif 4067 4068 #ifdef ENABLE_BLE 4069 static bool hci_run_general_gap_le(void){ 4070 4071 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4072 4073 if (hci_stack->state != HCI_STATE_WORKING) return false; 4074 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4075 4076 4077 // Phase 1: collect what to stop 4078 4079 bool scanning_stop = false; 4080 bool connecting_stop = false; 4081 bool advertising_stop = false; 4082 4083 #ifndef ENABLE_LE_CENTRAL 4084 UNUSED(scanning_stop); 4085 UNUSED(connecting_stop); 4086 #endif 4087 #ifndef ENABLE_LE_PERIPHERAL 4088 UNUSED(advertising_stop); 4089 #endif 4090 4091 // check if whitelist needs modification 4092 bool whitelist_modification_pending = false; 4093 btstack_linked_list_iterator_t lit; 4094 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4095 while (btstack_linked_list_iterator_has_next(&lit)){ 4096 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4097 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4098 whitelist_modification_pending = true; 4099 break; 4100 } 4101 } 4102 // check if resolving list needs modification 4103 bool resolving_list_modification_pending = false; 4104 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4105 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4106 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4107 resolving_list_modification_pending = true; 4108 } 4109 #endif 4110 4111 #ifdef ENABLE_LE_CENTRAL 4112 // scanning control 4113 if (hci_stack->le_scanning_active) { 4114 // stop if: 4115 // - parameter change required 4116 // - it's disabled 4117 // - whitelist change required but used for scanning 4118 // - resolving list modified 4119 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4120 if ((hci_stack->le_scanning_param_update) || 4121 !hci_stack->le_scanning_enabled || 4122 scanning_uses_whitelist || 4123 resolving_list_modification_pending){ 4124 4125 scanning_stop = true; 4126 } 4127 } 4128 #endif 4129 4130 #ifdef ENABLE_LE_CENTRAL 4131 // connecting control 4132 bool connecting_with_whitelist; 4133 switch (hci_stack->le_connecting_state){ 4134 case LE_CONNECTING_DIRECT: 4135 case LE_CONNECTING_WHITELIST: 4136 // stop connecting if: 4137 // - connecting uses white and whitelist modification pending 4138 // - if it got disabled 4139 // - resolving list modified 4140 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4141 if ((connecting_with_whitelist && whitelist_modification_pending) || 4142 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4143 resolving_list_modification_pending) { 4144 4145 connecting_stop = true; 4146 } 4147 break; 4148 default: 4149 break; 4150 } 4151 #endif 4152 4153 #ifdef ENABLE_LE_PERIPHERAL 4154 // le advertisement control 4155 if (hci_stack->le_advertisements_active){ 4156 // stop if: 4157 // - parameter change required 4158 // - it's disabled 4159 // - whitelist change required but used for advertisement filter policy 4160 // - resolving list modified 4161 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4162 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4163 if (advertising_change || 4164 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4165 (advertising_uses_whitelist & whitelist_modification_pending) || 4166 resolving_list_modification_pending) { 4167 4168 advertising_stop = true; 4169 } 4170 } 4171 #endif 4172 4173 4174 // Phase 2: stop everything that should be off during modifications 4175 4176 #ifdef ENABLE_LE_CENTRAL 4177 if (scanning_stop){ 4178 hci_stack->le_scanning_active = false; 4179 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4180 return true; 4181 } 4182 #endif 4183 4184 #ifdef ENABLE_LE_CENTRAL 4185 if (connecting_stop){ 4186 hci_send_cmd(&hci_le_create_connection_cancel); 4187 return true; 4188 } 4189 #endif 4190 4191 #ifdef ENABLE_LE_PERIPHERAL 4192 if (advertising_stop){ 4193 hci_stack->le_advertisements_active = false; 4194 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4195 return true; 4196 } 4197 #endif 4198 4199 // Phase 3: modify 4200 4201 #ifdef ENABLE_LE_CENTRAL 4202 if (hci_stack->le_scanning_param_update){ 4203 hci_stack->le_scanning_param_update = false; 4204 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4205 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4206 return true; 4207 } 4208 #endif 4209 4210 #ifdef ENABLE_LE_PERIPHERAL 4211 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4212 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4213 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4214 hci_send_cmd(&hci_le_set_advertising_parameters, 4215 hci_stack->le_advertisements_interval_min, 4216 hci_stack->le_advertisements_interval_max, 4217 hci_stack->le_advertisements_type, 4218 hci_stack->le_advertisements_own_addr_type, 4219 hci_stack->le_advertisements_direct_address_type, 4220 hci_stack->le_advertisements_direct_address, 4221 hci_stack->le_advertisements_channel_map, 4222 hci_stack->le_advertisements_filter_policy); 4223 return true; 4224 } 4225 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4226 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4227 uint8_t adv_data_clean[31]; 4228 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4229 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4230 hci_stack->le_advertisements_data_len); 4231 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4232 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4233 return true; 4234 } 4235 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4236 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4237 uint8_t scan_data_clean[31]; 4238 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4239 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4240 hci_stack->le_scan_response_data_len); 4241 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4242 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4243 return true; 4244 } 4245 #endif 4246 4247 4248 #ifdef ENABLE_LE_CENTRAL 4249 // if connect with whitelist was active and is not cancelled yet, wait until next time 4250 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4251 #endif 4252 4253 // LE Whitelist Management 4254 if (whitelist_modification_pending){ 4255 // add/remove entries 4256 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4257 while (btstack_linked_list_iterator_has_next(&lit)){ 4258 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4259 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4260 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4261 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4262 return true; 4263 } 4264 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4265 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4266 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4267 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4268 return true; 4269 } 4270 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4271 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4272 btstack_memory_whitelist_entry_free(entry); 4273 } 4274 } 4275 } 4276 4277 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4278 // LE Resolving List Management 4279 if (resolving_list_supported) { 4280 uint16_t i; 4281 switch (hci_stack->le_resolving_list_state) { 4282 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4283 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4284 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4285 return true; 4286 case LE_RESOLVING_LIST_READ_SIZE: 4287 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4288 hci_send_cmd(&hci_le_read_resolving_list_size); 4289 return true; 4290 case LE_RESOLVING_LIST_SEND_CLEAR: 4291 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4292 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4293 sizeof(hci_stack->le_resolving_list_add_entries)); 4294 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4295 sizeof(hci_stack->le_resolving_list_remove_entries)); 4296 hci_send_cmd(&hci_le_clear_resolving_list); 4297 return true; 4298 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4299 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4300 uint8_t offset = i >> 3; 4301 uint8_t mask = 1 << (i & 7); 4302 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4303 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4304 bd_addr_t peer_identity_addreses; 4305 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4306 sm_key_t peer_irk; 4307 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4308 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4309 4310 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4311 // trigger whitelist entry 'update' (work around for controller bug) 4312 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4313 while (btstack_linked_list_iterator_has_next(&lit)) { 4314 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4315 if (entry->address_type != peer_identity_addr_type) continue; 4316 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4317 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4318 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4319 } 4320 #endif 4321 4322 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4323 peer_identity_addreses); 4324 return true; 4325 } 4326 4327 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4328 4329 /* fall through */ 4330 4331 case LE_RESOLVING_LIST_ADD_ENTRIES: 4332 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4333 uint8_t offset = i >> 3; 4334 uint8_t mask = 1 << (i & 7); 4335 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4336 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4337 bd_addr_t peer_identity_addreses; 4338 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4339 sm_key_t peer_irk; 4340 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4341 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4342 const uint8_t *local_irk = gap_get_persistent_irk(); 4343 // command uses format specifier 'P' that stores 16-byte value without flip 4344 uint8_t local_irk_flipped[16]; 4345 uint8_t peer_irk_flipped[16]; 4346 reverse_128(local_irk, local_irk_flipped); 4347 reverse_128(peer_irk, peer_irk_flipped); 4348 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4349 peer_irk_flipped, local_irk_flipped); 4350 return true; 4351 } 4352 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4353 break; 4354 4355 default: 4356 break; 4357 } 4358 } 4359 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4360 #endif 4361 4362 // Phase 4: restore state 4363 4364 #ifdef ENABLE_LE_CENTRAL 4365 // re-start scanning 4366 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4367 hci_stack->le_scanning_active = true; 4368 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4369 return true; 4370 } 4371 #endif 4372 4373 #ifdef ENABLE_LE_CENTRAL 4374 // re-start connecting 4375 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4376 bd_addr_t null_addr; 4377 memset(null_addr, 0, 6); 4378 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4379 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4380 hci_send_cmd(&hci_le_create_connection, 4381 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4382 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4383 1, // use whitelist 4384 0, // peer address type 4385 null_addr, // peer bd addr 4386 hci_stack->le_connection_own_addr_type, // our addr type: 4387 hci_stack->le_connection_interval_min, // conn interval min 4388 hci_stack->le_connection_interval_max, // conn interval max 4389 hci_stack->le_connection_latency, // conn latency 4390 hci_stack->le_supervision_timeout, // conn latency 4391 hci_stack->le_minimum_ce_length, // min ce length 4392 hci_stack->le_maximum_ce_length // max ce length 4393 ); 4394 return true; 4395 } 4396 #endif 4397 4398 #ifdef ENABLE_LE_PERIPHERAL 4399 // re-start advertising 4400 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4401 // check if advertisements should be enabled given 4402 hci_stack->le_advertisements_active = true; 4403 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_advertisements_own_address); 4404 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4405 return true; 4406 } 4407 #endif 4408 4409 return false; 4410 } 4411 #endif 4412 4413 static bool hci_run_general_pending_commands(void){ 4414 btstack_linked_item_t * it; 4415 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4416 hci_connection_t * connection = (hci_connection_t *) it; 4417 4418 switch(connection->state){ 4419 case SEND_CREATE_CONNECTION: 4420 switch(connection->address_type){ 4421 #ifdef ENABLE_CLASSIC 4422 case BD_ADDR_TYPE_ACL: 4423 log_info("sending hci_create_connection"); 4424 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4425 break; 4426 #endif 4427 default: 4428 #ifdef ENABLE_BLE 4429 #ifdef ENABLE_LE_CENTRAL 4430 log_info("sending hci_le_create_connection"); 4431 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4432 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4433 hci_send_cmd(&hci_le_create_connection, 4434 hci_stack->le_connection_scan_interval, // conn scan interval 4435 hci_stack->le_connection_scan_window, // conn scan windows 4436 0, // don't use whitelist 4437 connection->address_type, // peer address type 4438 connection->address, // peer bd addr 4439 hci_stack->le_connection_own_addr_type, // our addr type: 4440 hci_stack->le_connection_interval_min, // conn interval min 4441 hci_stack->le_connection_interval_max, // conn interval max 4442 hci_stack->le_connection_latency, // conn latency 4443 hci_stack->le_supervision_timeout, // conn latency 4444 hci_stack->le_minimum_ce_length, // min ce length 4445 hci_stack->le_maximum_ce_length // max ce length 4446 ); 4447 connection->state = SENT_CREATE_CONNECTION; 4448 #endif 4449 #endif 4450 break; 4451 } 4452 return true; 4453 4454 #ifdef ENABLE_CLASSIC 4455 case RECEIVED_CONNECTION_REQUEST: 4456 connection->role = HCI_ROLE_SLAVE; 4457 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4458 log_info("sending hci_accept_connection_request"); 4459 connection->state = ACCEPTED_CONNECTION_REQUEST; 4460 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4461 } 4462 return true; 4463 #endif 4464 4465 #ifdef ENABLE_BLE 4466 #ifdef ENABLE_LE_CENTRAL 4467 case SEND_CANCEL_CONNECTION: 4468 connection->state = SENT_CANCEL_CONNECTION; 4469 hci_send_cmd(&hci_le_create_connection_cancel); 4470 return true; 4471 #endif 4472 #endif 4473 case SEND_DISCONNECT: 4474 connection->state = SENT_DISCONNECT; 4475 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4476 return true; 4477 4478 default: 4479 break; 4480 } 4481 4482 // no further commands if connection is about to get shut down 4483 if (connection->state == SENT_DISCONNECT) continue; 4484 4485 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4486 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4487 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4488 return true; 4489 } 4490 4491 #ifdef ENABLE_CLASSIC 4492 4493 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4494 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4495 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4496 return true; 4497 } 4498 4499 // Handling link key request requires remote supported features 4500 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4501 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4502 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4503 4504 // lookup link key using cached key first 4505 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4506 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4507 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4508 } 4509 4510 bool sc_enabled_remote = hci_remote_sc_enabled(connection); 4511 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(connection->link_key_type) == 1) && !sc_enabled_remote; 4512 if (sc_downgrade){ 4513 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4514 connection->state = SENT_DISCONNECT; 4515 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4516 return true; 4517 } 4518 4519 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4520 if (have_link_key && security_level_sufficient){ 4521 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4522 } else { 4523 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4524 } 4525 return true; 4526 } 4527 4528 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4529 log_info("denying to pin request"); 4530 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4531 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4532 return true; 4533 } 4534 4535 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4536 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4537 // set authentication requirements: 4538 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4539 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4540 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4541 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4542 authreq |= 1; 4543 } 4544 bool bonding = hci_stack->bondable; 4545 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4546 // if we have received IO Cap Response, we're in responder role 4547 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4548 if (bonding && !remote_bonding){ 4549 log_info("Remote not bonding, dropping local flag"); 4550 bonding = false; 4551 } 4552 } 4553 if (bonding){ 4554 if (connection->bonding_flags & BONDING_DEDICATED){ 4555 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4556 } else { 4557 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4558 } 4559 } 4560 uint8_t have_oob_data = 0; 4561 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4562 if (connection->classic_oob_c_192 != NULL){ 4563 have_oob_data |= 1; 4564 } 4565 if (connection->classic_oob_c_256 != NULL){ 4566 have_oob_data |= 2; 4567 } 4568 #endif 4569 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4570 return true; 4571 } 4572 4573 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4574 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4575 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4576 return true; 4577 } 4578 4579 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4580 if (connection->authentication_flags & SEND_REMOTE_OOB_DATA_REPLY){ 4581 connectionClearAuthenticationFlags(connection, SEND_REMOTE_OOB_DATA_REPLY); 4582 const uint8_t zero[16] = { 0 }; 4583 const uint8_t * r_192 = zero; 4584 const uint8_t * c_192 = zero; 4585 const uint8_t * r_256 = zero; 4586 const uint8_t * c_256 = zero; 4587 // verify P-256 OOB 4588 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4589 c_256 = connection->classic_oob_c_256; 4590 if (connection->classic_oob_r_256 != NULL) { 4591 r_256 = connection->classic_oob_r_256; 4592 } 4593 } 4594 // verify P-192 OOB 4595 if ((connection->classic_oob_c_192 != NULL)) { 4596 c_192 = connection->classic_oob_c_192; 4597 if (connection->classic_oob_r_192 != NULL) { 4598 r_192 = connection->classic_oob_r_192; 4599 } 4600 } 4601 // Reply 4602 if (c_256 != zero) { 4603 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4604 } else if (c_192 != zero){ 4605 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4606 } else { 4607 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4608 } 4609 return true; 4610 } 4611 #endif 4612 4613 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4614 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4615 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4616 return true; 4617 } 4618 4619 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4620 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4621 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4622 return true; 4623 } 4624 4625 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4626 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4627 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4628 return true; 4629 } 4630 4631 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4632 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4633 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4634 return true; 4635 } 4636 4637 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4638 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4639 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4640 return true; 4641 } 4642 4643 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4644 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4645 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4646 return true; 4647 } 4648 4649 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4650 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4651 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4652 connection->state = SENT_DISCONNECT; 4653 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4654 return true; 4655 } 4656 4657 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4658 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4659 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4660 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4661 return true; 4662 } 4663 4664 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4665 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4666 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4667 return true; 4668 } 4669 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4670 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4671 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4672 return true; 4673 } 4674 #endif 4675 4676 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4677 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4678 #ifdef ENABLE_CLASSIC 4679 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4680 #endif 4681 if (connection->state != SENT_DISCONNECT){ 4682 connection->state = SENT_DISCONNECT; 4683 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4684 return true; 4685 } 4686 } 4687 4688 #ifdef ENABLE_CLASSIC 4689 uint16_t sniff_min_interval; 4690 switch (connection->sniff_min_interval){ 4691 case 0: 4692 break; 4693 case 0xffff: 4694 connection->sniff_min_interval = 0; 4695 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4696 return true; 4697 default: 4698 sniff_min_interval = connection->sniff_min_interval; 4699 connection->sniff_min_interval = 0; 4700 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4701 return true; 4702 } 4703 4704 if (connection->sniff_subrating_max_latency != 0xffff){ 4705 uint16_t max_latency = connection->sniff_subrating_max_latency; 4706 connection->sniff_subrating_max_latency = 0; 4707 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4708 return true; 4709 } 4710 4711 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4712 uint8_t service_type = (uint8_t) connection->qos_service_type; 4713 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4714 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); 4715 return true; 4716 } 4717 4718 if (connection->request_role != HCI_ROLE_INVALID){ 4719 hci_role_t role = connection->request_role; 4720 connection->request_role = HCI_ROLE_INVALID; 4721 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4722 return true; 4723 } 4724 #endif 4725 4726 #ifdef ENABLE_BLE 4727 switch (connection->le_con_parameter_update_state){ 4728 // response to L2CAP CON PARAMETER UPDATE REQUEST 4729 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4730 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4731 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4732 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4733 0x0000, 0xffff); 4734 return true; 4735 case CON_PARAMETER_UPDATE_REPLY: 4736 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4737 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4738 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4739 0x0000, 0xffff); 4740 return true; 4741 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4742 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4743 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4744 return true; 4745 default: 4746 break; 4747 } 4748 if (connection->le_phy_update_all_phys != 0xffu){ 4749 uint8_t all_phys = connection->le_phy_update_all_phys; 4750 connection->le_phy_update_all_phys = 0xff; 4751 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); 4752 return true; 4753 } 4754 #endif 4755 } 4756 return false; 4757 } 4758 4759 static void hci_run(void){ 4760 4761 bool done; 4762 4763 // send continuation fragments first, as they block the prepared packet buffer 4764 done = hci_run_acl_fragments(); 4765 if (done) return; 4766 4767 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4768 // send host num completed packets next as they don't require num_cmd_packets > 0 4769 if (!hci_can_send_comand_packet_transport()) return; 4770 if (hci_stack->host_completed_packets){ 4771 hci_host_num_completed_packets(); 4772 return; 4773 } 4774 #endif 4775 4776 if (!hci_can_send_command_packet_now()) return; 4777 4778 // global/non-connection oriented commands 4779 4780 4781 #ifdef ENABLE_CLASSIC 4782 // general gap classic 4783 done = hci_run_general_gap_classic(); 4784 if (done) return; 4785 #endif 4786 4787 #ifdef ENABLE_BLE 4788 // general gap le 4789 done = hci_run_general_gap_le(); 4790 if (done) return; 4791 #endif 4792 4793 // send pending HCI commands 4794 done = hci_run_general_pending_commands(); 4795 if (done) return; 4796 4797 // stack state sub statemachines 4798 hci_connection_t * connection; 4799 switch (hci_stack->state){ 4800 case HCI_STATE_INITIALIZING: 4801 hci_initializing_run(); 4802 break; 4803 4804 case HCI_STATE_HALTING: 4805 4806 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4807 switch (hci_stack->substate){ 4808 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4809 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4810 4811 #ifdef ENABLE_BLE 4812 #ifdef ENABLE_LE_CENTRAL 4813 // free whitelist entries 4814 { 4815 btstack_linked_list_iterator_t lit; 4816 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4817 while (btstack_linked_list_iterator_has_next(&lit)){ 4818 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4819 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4820 btstack_memory_whitelist_entry_free(entry); 4821 } 4822 } 4823 #endif 4824 #endif 4825 // close all open connections 4826 connection = (hci_connection_t *) hci_stack->connections; 4827 if (connection){ 4828 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4829 if (!hci_can_send_command_packet_now()) return; 4830 4831 // check state 4832 if (connection->state == SENT_DISCONNECT) return; 4833 connection->state = SENT_DISCONNECT; 4834 4835 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4836 4837 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4838 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4839 4840 // ... which would be ignored anyway as we shutdown (free) the connection now 4841 hci_shutdown_connection(connection); 4842 4843 // finally, send the disconnect command 4844 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4845 return; 4846 } 4847 4848 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4849 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4850 log_info("HCI_STATE_HALTING: wait 50 ms"); 4851 hci_stack->substate = HCI_HALTING_W4_TIMER; 4852 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4853 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4854 btstack_run_loop_add_timer(&hci_stack->timeout); 4855 break; 4856 } 4857 4858 /* fall through */ 4859 4860 case HCI_HALTING_CLOSE: 4861 log_info("HCI_STATE_HALTING, calling off"); 4862 4863 // switch mode 4864 hci_power_control_off(); 4865 4866 log_info("HCI_STATE_HALTING, emitting state"); 4867 hci_emit_state(); 4868 log_info("HCI_STATE_HALTING, done"); 4869 break; 4870 4871 case HCI_HALTING_W4_TIMER: 4872 // keep waiting 4873 4874 break; 4875 default: 4876 break; 4877 } 4878 4879 break; 4880 4881 case HCI_STATE_FALLING_ASLEEP: 4882 switch(hci_stack->substate) { 4883 case HCI_FALLING_ASLEEP_DISCONNECT: 4884 log_info("HCI_STATE_FALLING_ASLEEP"); 4885 // close all open connections 4886 connection = (hci_connection_t *) hci_stack->connections; 4887 4888 #ifdef HAVE_PLATFORM_IPHONE_OS 4889 // don't close connections, if H4 supports power management 4890 if (btstack_control_iphone_power_management_enabled()){ 4891 connection = NULL; 4892 } 4893 #endif 4894 if (connection){ 4895 4896 // send disconnect 4897 if (!hci_can_send_command_packet_now()) return; 4898 4899 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4900 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4901 4902 // send disconnected event right away - causes higher layer connections to get closed, too. 4903 hci_shutdown_connection(connection); 4904 return; 4905 } 4906 4907 if (hci_classic_supported()){ 4908 // disable page and inquiry scan 4909 if (!hci_can_send_command_packet_now()) return; 4910 4911 log_info("HCI_STATE_HALTING, disabling inq scans"); 4912 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4913 4914 // continue in next sub state 4915 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4916 break; 4917 } 4918 4919 /* fall through */ 4920 4921 case HCI_FALLING_ASLEEP_COMPLETE: 4922 log_info("HCI_STATE_HALTING, calling sleep"); 4923 #ifdef HAVE_PLATFORM_IPHONE_OS 4924 // don't actually go to sleep, if H4 supports power management 4925 if (btstack_control_iphone_power_management_enabled()){ 4926 // SLEEP MODE reached 4927 hci_stack->state = HCI_STATE_SLEEPING; 4928 hci_emit_state(); 4929 break; 4930 } 4931 #endif 4932 // switch mode 4933 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4934 hci_emit_state(); 4935 break; 4936 4937 default: 4938 break; 4939 } 4940 break; 4941 4942 default: 4943 break; 4944 } 4945 } 4946 4947 int hci_send_cmd_packet(uint8_t *packet, int size){ 4948 // house-keeping 4949 4950 #ifdef ENABLE_CLASSIC 4951 bd_addr_t addr; 4952 hci_connection_t * conn; 4953 #endif 4954 #ifdef ENABLE_LE_CENTRAL 4955 uint8_t initiator_filter_policy; 4956 #endif 4957 4958 uint16_t opcode = little_endian_read_16(packet, 0); 4959 switch (opcode) { 4960 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4961 hci_stack->loopback_mode = packet[3]; 4962 break; 4963 4964 #ifdef ENABLE_CLASSIC 4965 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4966 reverse_bd_addr(&packet[3], addr); 4967 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4968 4969 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4970 if (!conn) { 4971 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4972 if (!conn) { 4973 // notify client that alloc failed 4974 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4975 return -1; // packet not sent to controller 4976 } 4977 conn->state = SEND_CREATE_CONNECTION; 4978 conn->role = HCI_ROLE_MASTER; 4979 } 4980 log_info("conn state %u", conn->state); 4981 switch (conn->state) { 4982 // if connection active exists 4983 case OPEN: 4984 // and OPEN, emit connection complete command 4985 hci_emit_connection_complete(addr, conn->con_handle, 0); 4986 return -1; // packet not sent to controller 4987 case RECEIVED_DISCONNECTION_COMPLETE: 4988 // create connection triggered in disconnect complete event, let's do it now 4989 break; 4990 case SEND_CREATE_CONNECTION: 4991 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4992 break; 4993 default: 4994 // otherwise, just ignore as it is already in the open process 4995 return -1; // packet not sent to controller 4996 } 4997 conn->state = SENT_CREATE_CONNECTION; 4998 4999 // track outgoing connection 5000 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5001 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5002 break; 5003 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5004 if (hci_stack->link_key_db) { 5005 reverse_bd_addr(&packet[3], addr); 5006 hci_stack->link_key_db->delete_link_key(addr); 5007 } 5008 break; 5009 5010 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5011 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5012 // setup_synchronous_connection? Voice setting at offset 22 5013 // TODO: compare to current setting if sco connection already active 5014 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5015 break; 5016 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5017 // accept_synchronus_connection? Voice setting at offset 18 5018 // TODO: compare to current setting if sco connection already active 5019 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5020 break; 5021 #endif 5022 #endif 5023 5024 #ifdef ENABLE_BLE 5025 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5026 hci_stack->le_random_address_set = 1; 5027 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5028 break; 5029 #ifdef ENABLE_LE_PERIPHERAL 5030 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5031 hci_stack->le_advertisements_active = packet[3] != 0; 5032 break; 5033 #endif 5034 #ifdef ENABLE_LE_CENTRAL 5035 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5036 // white list used? 5037 initiator_filter_policy = packet[7]; 5038 switch (initiator_filter_policy) { 5039 case 0: 5040 // whitelist not used 5041 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5042 break; 5043 case 1: 5044 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5045 break; 5046 default: 5047 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5048 break; 5049 } 5050 // track outgoing connection 5051 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5052 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5053 break; 5054 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5055 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5056 break; 5057 #endif 5058 #endif 5059 default: 5060 break; 5061 } 5062 5063 hci_stack->num_cmd_packets--; 5064 5065 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5066 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5067 } 5068 5069 // disconnect because of security block 5070 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5071 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5072 if (!connection) return; 5073 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5074 } 5075 5076 5077 // Configure Secure Simple Pairing 5078 5079 #ifdef ENABLE_CLASSIC 5080 5081 // enable will enable SSP during init 5082 void gap_ssp_set_enable(int enable){ 5083 hci_stack->ssp_enable = enable; 5084 } 5085 5086 static int hci_local_ssp_activated(void){ 5087 return gap_ssp_supported() && hci_stack->ssp_enable; 5088 } 5089 5090 // if set, BTstack will respond to io capability request using authentication requirement 5091 void gap_ssp_set_io_capability(int io_capability){ 5092 hci_stack->ssp_io_capability = io_capability; 5093 } 5094 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5095 hci_stack->ssp_authentication_requirement = authentication_requirement; 5096 } 5097 5098 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5099 void gap_ssp_set_auto_accept(int auto_accept){ 5100 hci_stack->ssp_auto_accept = auto_accept; 5101 } 5102 5103 void gap_secure_connections_enable(bool enable){ 5104 hci_stack->secure_connections_enable = enable; 5105 } 5106 5107 #endif 5108 5109 // va_list part of hci_send_cmd 5110 int hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5111 if (!hci_can_send_command_packet_now()){ 5112 log_error("hci_send_cmd called but cannot send packet now"); 5113 return 0; 5114 } 5115 5116 // for HCI INITIALIZATION 5117 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5118 hci_stack->last_cmd_opcode = cmd->opcode; 5119 5120 hci_reserve_packet_buffer(); 5121 uint8_t * packet = hci_stack->hci_packet_buffer; 5122 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5123 int err = hci_send_cmd_packet(packet, size); 5124 5125 // release packet buffer on error or for synchronous transport implementations 5126 if ((err < 0) || hci_transport_synchronous()){ 5127 hci_release_packet_buffer(); 5128 hci_emit_transport_packet_sent(); 5129 } 5130 5131 return err; 5132 } 5133 5134 /** 5135 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5136 */ 5137 int hci_send_cmd(const hci_cmd_t * cmd, ...){ 5138 va_list argptr; 5139 va_start(argptr, cmd); 5140 int res = hci_send_cmd_va_arg(cmd, argptr); 5141 va_end(argptr); 5142 return res; 5143 } 5144 5145 // Create various non-HCI events. 5146 // TODO: generalize, use table similar to hci_create_command 5147 5148 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5149 // dump packet 5150 if (dump) { 5151 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5152 } 5153 5154 // dispatch to all event handlers 5155 btstack_linked_list_iterator_t it; 5156 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5157 while (btstack_linked_list_iterator_has_next(&it)){ 5158 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5159 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5160 } 5161 } 5162 5163 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5164 if (!hci_stack->acl_packet_handler) return; 5165 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5166 } 5167 5168 #ifdef ENABLE_CLASSIC 5169 static void hci_notify_if_sco_can_send_now(void){ 5170 // notify SCO sender if waiting 5171 if (!hci_stack->sco_waiting_for_can_send_now) return; 5172 if (hci_can_send_sco_packet_now()){ 5173 hci_stack->sco_waiting_for_can_send_now = 0; 5174 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5175 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5176 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5177 } 5178 } 5179 5180 // parsing end emitting has been merged to reduce code size 5181 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5182 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5183 5184 uint8_t * eir_data; 5185 ad_context_t context; 5186 const uint8_t * name; 5187 uint8_t name_len; 5188 5189 if (size < 3) return; 5190 5191 int event_type = hci_event_packet_get_type(packet); 5192 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5193 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5194 5195 switch (event_type){ 5196 case HCI_EVENT_INQUIRY_RESULT: 5197 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5198 if (size != (3 + (num_responses * 14))) return; 5199 break; 5200 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5201 if (size != 257) return; 5202 if (num_responses != 1) return; 5203 break; 5204 default: 5205 return; 5206 } 5207 5208 // event[1] is set at the end 5209 int i; 5210 for (i=0; i<num_responses;i++){ 5211 memset(event, 0, sizeof(event)); 5212 event[0] = GAP_EVENT_INQUIRY_RESULT; 5213 uint8_t event_size = 18; // if name is not set by EIR 5214 5215 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5216 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5217 (void)memcpy(&event[9], 5218 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5219 3); // class of device 5220 (void)memcpy(&event[12], 5221 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5222 2); // clock offset 5223 5224 switch (event_type){ 5225 case HCI_EVENT_INQUIRY_RESULT: 5226 // 14,15,16,17 = 0, size 18 5227 break; 5228 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5229 event[14] = 1; 5230 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5231 // 16,17 = 0, size 18 5232 break; 5233 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5234 event[14] = 1; 5235 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5236 // EIR packets only contain a single inquiry response 5237 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5238 name = NULL; 5239 // Iterate over EIR data 5240 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5241 uint8_t data_type = ad_iterator_get_data_type(&context); 5242 uint8_t data_size = ad_iterator_get_data_len(&context); 5243 const uint8_t * data = ad_iterator_get_data(&context); 5244 // Prefer Complete Local Name over Shortened Local Name 5245 switch (data_type){ 5246 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5247 if (name) continue; 5248 /* fall through */ 5249 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5250 name = data; 5251 name_len = data_size; 5252 break; 5253 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5254 if (data_size != 8) break; 5255 event[16] = 1; 5256 memcpy(&event[17], data, 8); 5257 break; 5258 default: 5259 break; 5260 } 5261 } 5262 if (name){ 5263 event[25] = 1; 5264 // truncate name if needed 5265 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5266 event[26] = len; 5267 (void)memcpy(&event[27], name, len); 5268 event_size += len; 5269 } 5270 break; 5271 default: 5272 return; 5273 } 5274 event[1] = event_size - 2; 5275 hci_emit_event(event, event_size, 1); 5276 } 5277 } 5278 #endif 5279 5280 void hci_emit_state(void){ 5281 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5282 uint8_t event[3]; 5283 event[0] = BTSTACK_EVENT_STATE; 5284 event[1] = sizeof(event) - 2u; 5285 event[2] = hci_stack->state; 5286 hci_emit_event(event, sizeof(event), 1); 5287 } 5288 5289 #ifdef ENABLE_CLASSIC 5290 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5291 uint8_t event[13]; 5292 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5293 event[1] = sizeof(event) - 2; 5294 event[2] = status; 5295 little_endian_store_16(event, 3, con_handle); 5296 reverse_bd_addr(address, &event[5]); 5297 event[11] = 1; // ACL connection 5298 event[12] = 0; // encryption disabled 5299 hci_emit_event(event, sizeof(event), 1); 5300 } 5301 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5302 if (disable_l2cap_timeouts) return; 5303 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5304 uint8_t event[4]; 5305 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5306 event[1] = sizeof(event) - 2; 5307 little_endian_store_16(event, 2, conn->con_handle); 5308 hci_emit_event(event, sizeof(event), 1); 5309 } 5310 #endif 5311 5312 #ifdef ENABLE_BLE 5313 #ifdef ENABLE_LE_CENTRAL 5314 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){ 5315 uint8_t event[21]; 5316 event[0] = HCI_EVENT_LE_META; 5317 event[1] = sizeof(event) - 2u; 5318 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5319 event[3] = status; 5320 little_endian_store_16(event, 4, con_handle); 5321 event[6] = 0; // TODO: role 5322 event[7] = address_type; 5323 reverse_bd_addr(address, &event[8]); 5324 little_endian_store_16(event, 14, 0); // interval 5325 little_endian_store_16(event, 16, 0); // latency 5326 little_endian_store_16(event, 18, 0); // supervision timeout 5327 event[20] = 0; // master clock accuracy 5328 hci_emit_event(event, sizeof(event), 1); 5329 } 5330 #endif 5331 #endif 5332 5333 static void hci_emit_transport_packet_sent(void){ 5334 // notify upper stack that it might be possible to send again 5335 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5336 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5337 } 5338 5339 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5340 uint8_t event[6]; 5341 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5342 event[1] = sizeof(event) - 2u; 5343 event[2] = 0; // status = OK 5344 little_endian_store_16(event, 3, con_handle); 5345 event[5] = reason; 5346 hci_emit_event(event, sizeof(event), 1); 5347 } 5348 5349 static void hci_emit_nr_connections_changed(void){ 5350 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5351 uint8_t event[3]; 5352 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5353 event[1] = sizeof(event) - 2u; 5354 event[2] = nr_hci_connections(); 5355 hci_emit_event(event, sizeof(event), 1); 5356 } 5357 5358 static void hci_emit_hci_open_failed(void){ 5359 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5360 uint8_t event[2]; 5361 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5362 event[1] = sizeof(event) - 2u; 5363 hci_emit_event(event, sizeof(event), 1); 5364 } 5365 5366 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5367 log_info("hci_emit_dedicated_bonding_result %u ", status); 5368 uint8_t event[9]; 5369 int pos = 0; 5370 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5371 event[pos++] = sizeof(event) - 2u; 5372 event[pos++] = status; 5373 reverse_bd_addr(address, &event[pos]); 5374 hci_emit_event(event, sizeof(event), 1); 5375 } 5376 5377 5378 #ifdef ENABLE_CLASSIC 5379 5380 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5381 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5382 uint8_t event[5]; 5383 int pos = 0; 5384 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5385 event[pos++] = sizeof(event) - 2; 5386 little_endian_store_16(event, 2, con_handle); 5387 pos += 2; 5388 event[pos++] = level; 5389 hci_emit_event(event, sizeof(event), 1); 5390 } 5391 5392 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5393 if (!connection) return LEVEL_0; 5394 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5395 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5396 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5397 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5398 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5399 // LEVEL 4 always requires 128 bit encrytion key size 5400 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5401 security_level = LEVEL_3; 5402 } 5403 return security_level; 5404 } 5405 5406 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5407 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5408 uint8_t event[3]; 5409 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5410 event[1] = sizeof(event) - 2; 5411 event[2] = enabled; 5412 hci_emit_event(event, sizeof(event), 1); 5413 } 5414 5415 // query if remote side supports eSCO 5416 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5417 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5418 if (!connection) return 0; 5419 return (connection->remote_supported_features[0] & 1) != 0; 5420 } 5421 5422 static bool hci_ssp_supported(hci_connection_t * connection){ 5423 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5424 return (connection->bonding_flags & mask) == mask; 5425 } 5426 5427 // query if remote side supports SSP 5428 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5429 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5430 if (!connection) return 0; 5431 return hci_ssp_supported(connection) ? 1 : 0; 5432 } 5433 5434 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5435 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5436 } 5437 5438 // GAP API 5439 /** 5440 * @bbrief enable/disable bonding. default is enabled 5441 * @praram enabled 5442 */ 5443 void gap_set_bondable_mode(int enable){ 5444 hci_stack->bondable = enable ? 1 : 0; 5445 } 5446 /** 5447 * @brief Get bondable mode. 5448 * @return 1 if bondable 5449 */ 5450 int gap_get_bondable_mode(void){ 5451 return hci_stack->bondable; 5452 } 5453 5454 /** 5455 * @brief map link keys to security levels 5456 */ 5457 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5458 switch (link_key_type){ 5459 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5460 return LEVEL_4; 5461 case COMBINATION_KEY: 5462 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5463 return LEVEL_3; 5464 default: 5465 return LEVEL_2; 5466 } 5467 } 5468 5469 /** 5470 * @brief map link keys to secure connection yes/no 5471 */ 5472 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5473 switch (link_key_type){ 5474 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5475 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5476 return 1; 5477 default: 5478 return 0; 5479 } 5480 } 5481 5482 /** 5483 * @brief map link keys to authenticated 5484 */ 5485 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5486 switch (link_key_type){ 5487 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5488 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5489 return 1; 5490 default: 5491 return 0; 5492 } 5493 } 5494 5495 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5496 log_info("gap_mitm_protection_required_for_security_level %u", level); 5497 return level > LEVEL_2; 5498 } 5499 5500 /** 5501 * @brief get current security level 5502 */ 5503 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5504 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5505 if (!connection) return LEVEL_0; 5506 return gap_security_level_for_connection(connection); 5507 } 5508 5509 /** 5510 * @brief request connection to device to 5511 * @result GAP_AUTHENTICATION_RESULT 5512 */ 5513 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5514 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5515 if (!connection){ 5516 hci_emit_security_level(con_handle, LEVEL_0); 5517 return; 5518 } 5519 5520 btstack_assert(hci_is_le_connection(connection) == false); 5521 5522 // Core Spec 5.2, GAP 5.2.2: "When in Secure Connections Only mode, all services (except those allowed to have Security Mode 4, Level 0) 5523 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5524 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5525 requested_level = LEVEL_4; 5526 } 5527 5528 gap_security_level_t current_level = gap_security_level(con_handle); 5529 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5530 requested_level, connection->requested_security_level, current_level); 5531 5532 // authentication active if authentication request was sent or planned level > 0 5533 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5534 if (authentication_active){ 5535 // authentication already active 5536 if (connection->requested_security_level < requested_level){ 5537 // increase requested level as new level is higher 5538 // TODO: handle re-authentication when done 5539 connection->requested_security_level = requested_level; 5540 } 5541 } else { 5542 // no request active, notify if security sufficient 5543 if (requested_level <= current_level){ 5544 hci_emit_security_level(con_handle, current_level); 5545 return; 5546 } 5547 5548 // store request 5549 connection->requested_security_level = requested_level; 5550 5551 // start to authenticate connection 5552 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5553 hci_run(); 5554 } 5555 } 5556 5557 /** 5558 * @brief start dedicated bonding with device. disconnect after bonding 5559 * @param device 5560 * @param request MITM protection 5561 * @result GAP_DEDICATED_BONDING_COMPLETE 5562 */ 5563 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5564 5565 // create connection state machine 5566 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5567 5568 if (!connection){ 5569 return BTSTACK_MEMORY_ALLOC_FAILED; 5570 } 5571 5572 // delete linkn key 5573 gap_drop_link_key_for_bd_addr(device); 5574 5575 // configure LEVEL_2/3, dedicated bonding 5576 connection->state = SEND_CREATE_CONNECTION; 5577 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5578 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5579 connection->bonding_flags = BONDING_DEDICATED; 5580 5581 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5582 5583 // handle: connnection failure (connection complete != ok) 5584 // handle: authentication failure 5585 // handle: disconnect on done 5586 5587 hci_run(); 5588 5589 return 0; 5590 } 5591 #endif 5592 5593 void gap_set_local_name(const char * local_name){ 5594 hci_stack->local_name = local_name; 5595 } 5596 5597 5598 #ifdef ENABLE_BLE 5599 5600 #ifdef ENABLE_LE_CENTRAL 5601 void gap_start_scan(void){ 5602 hci_stack->le_scanning_enabled = true; 5603 hci_run(); 5604 } 5605 5606 void gap_stop_scan(void){ 5607 hci_stack->le_scanning_enabled = false; 5608 hci_run(); 5609 } 5610 5611 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5612 hci_stack->le_scan_type = scan_type; 5613 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5614 hci_stack->le_scan_interval = scan_interval; 5615 hci_stack->le_scan_window = scan_window; 5616 hci_stack->le_scanning_param_update = true; 5617 hci_run(); 5618 } 5619 5620 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5621 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5622 } 5623 5624 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5625 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5626 if (!conn){ 5627 // disallow if le connection is already outgoing 5628 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5629 log_error("le connection already active"); 5630 return ERROR_CODE_COMMAND_DISALLOWED; 5631 } 5632 5633 log_info("gap_connect: no connection exists yet, creating context"); 5634 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5635 if (!conn){ 5636 // notify client that alloc failed 5637 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5638 log_info("gap_connect: failed to alloc hci_connection_t"); 5639 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5640 } 5641 5642 // set le connecting state 5643 if (hci_is_le_connection_type(addr_type)){ 5644 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5645 } 5646 5647 conn->state = SEND_CREATE_CONNECTION; 5648 log_info("gap_connect: send create connection next"); 5649 hci_run(); 5650 return ERROR_CODE_SUCCESS; 5651 } 5652 5653 if (!hci_is_le_connection(conn) || 5654 (conn->state == SEND_CREATE_CONNECTION) || 5655 (conn->state == SENT_CREATE_CONNECTION)) { 5656 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5657 log_error("gap_connect: classic connection or connect is already being created"); 5658 return GATT_CLIENT_IN_WRONG_STATE; 5659 } 5660 5661 // check if connection was just disconnected 5662 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5663 log_info("gap_connect: send create connection (again)"); 5664 conn->state = SEND_CREATE_CONNECTION; 5665 hci_run(); 5666 return ERROR_CODE_SUCCESS; 5667 } 5668 5669 log_info("gap_connect: context exists with state %u", conn->state); 5670 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5671 hci_run(); 5672 return ERROR_CODE_SUCCESS; 5673 } 5674 5675 // @assumption: only a single outgoing LE Connection exists 5676 static hci_connection_t * gap_get_outgoing_connection(void){ 5677 btstack_linked_item_t *it; 5678 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5679 hci_connection_t * conn = (hci_connection_t *) it; 5680 if (!hci_is_le_connection(conn)) continue; 5681 switch (conn->state){ 5682 case SEND_CREATE_CONNECTION: 5683 case SENT_CREATE_CONNECTION: 5684 case SENT_CANCEL_CONNECTION: 5685 return conn; 5686 default: 5687 break; 5688 }; 5689 } 5690 return NULL; 5691 } 5692 5693 uint8_t gap_connect_cancel(void){ 5694 hci_connection_t * conn = gap_get_outgoing_connection(); 5695 if (!conn) return 0; 5696 switch (conn->state){ 5697 case SEND_CREATE_CONNECTION: 5698 // skip sending create connection and emit event instead 5699 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5700 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5701 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5702 btstack_memory_hci_connection_free( conn ); 5703 break; 5704 case SENT_CREATE_CONNECTION: 5705 // request to send cancel connection 5706 conn->state = SEND_CANCEL_CONNECTION; 5707 hci_run(); 5708 break; 5709 default: 5710 break; 5711 } 5712 return 0; 5713 } 5714 #endif 5715 5716 #ifdef ENABLE_LE_CENTRAL 5717 /** 5718 * @brief Set connection parameters for outgoing connections 5719 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5720 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5721 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5722 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5723 * @param conn_latency, default: 4 5724 * @param supervision_timeout (unit: 10ms), default: 720 ms 5725 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5726 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5727 */ 5728 5729 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5730 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5731 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5732 hci_stack->le_connection_scan_interval = conn_scan_interval; 5733 hci_stack->le_connection_scan_window = conn_scan_window; 5734 hci_stack->le_connection_interval_min = conn_interval_min; 5735 hci_stack->le_connection_interval_max = conn_interval_max; 5736 hci_stack->le_connection_latency = conn_latency; 5737 hci_stack->le_supervision_timeout = supervision_timeout; 5738 hci_stack->le_minimum_ce_length = min_ce_length; 5739 hci_stack->le_maximum_ce_length = max_ce_length; 5740 } 5741 #endif 5742 5743 /** 5744 * @brief Updates the connection parameters for a given LE connection 5745 * @param handle 5746 * @param conn_interval_min (unit: 1.25ms) 5747 * @param conn_interval_max (unit: 1.25ms) 5748 * @param conn_latency 5749 * @param supervision_timeout (unit: 10ms) 5750 * @returns 0 if ok 5751 */ 5752 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5753 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5754 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5755 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5756 connection->le_conn_interval_min = conn_interval_min; 5757 connection->le_conn_interval_max = conn_interval_max; 5758 connection->le_conn_latency = conn_latency; 5759 connection->le_supervision_timeout = supervision_timeout; 5760 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5761 hci_run(); 5762 return 0; 5763 } 5764 5765 /** 5766 * @brief Request an update of the connection parameter for a given LE connection 5767 * @param handle 5768 * @param conn_interval_min (unit: 1.25ms) 5769 * @param conn_interval_max (unit: 1.25ms) 5770 * @param conn_latency 5771 * @param supervision_timeout (unit: 10ms) 5772 * @returns 0 if ok 5773 */ 5774 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5775 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5776 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5777 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5778 connection->le_conn_interval_min = conn_interval_min; 5779 connection->le_conn_interval_max = conn_interval_max; 5780 connection->le_conn_latency = conn_latency; 5781 connection->le_supervision_timeout = supervision_timeout; 5782 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5783 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5784 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5785 return 0; 5786 } 5787 5788 #ifdef ENABLE_LE_PERIPHERAL 5789 5790 /** 5791 * @brief Set Advertisement Data 5792 * @param advertising_data_length 5793 * @param advertising_data (max 31 octets) 5794 * @note data is not copied, pointer has to stay valid 5795 */ 5796 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5797 hci_stack->le_advertisements_data_len = advertising_data_length; 5798 hci_stack->le_advertisements_data = advertising_data; 5799 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5800 hci_run(); 5801 } 5802 5803 /** 5804 * @brief Set Scan Response Data 5805 * @param advertising_data_length 5806 * @param advertising_data (max 31 octets) 5807 * @note data is not copied, pointer has to stay valid 5808 */ 5809 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5810 hci_stack->le_scan_response_data_len = scan_response_data_length; 5811 hci_stack->le_scan_response_data = scan_response_data; 5812 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5813 hci_run(); 5814 } 5815 5816 /** 5817 * @brief Set Advertisement Parameters 5818 * @param adv_int_min 5819 * @param adv_int_max 5820 * @param adv_type 5821 * @param direct_address_type 5822 * @param direct_address 5823 * @param channel_map 5824 * @param filter_policy 5825 * 5826 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5827 */ 5828 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5829 uint8_t direct_address_typ, bd_addr_t direct_address, 5830 uint8_t channel_map, uint8_t filter_policy) { 5831 5832 hci_stack->le_advertisements_interval_min = adv_int_min; 5833 hci_stack->le_advertisements_interval_max = adv_int_max; 5834 hci_stack->le_advertisements_type = adv_type; 5835 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5836 hci_stack->le_advertisements_channel_map = channel_map; 5837 hci_stack->le_advertisements_filter_policy = filter_policy; 5838 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5839 6); 5840 5841 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 5842 hci_run(); 5843 } 5844 5845 /** 5846 * @brief Enable/Disable Advertisements 5847 * @param enabled 5848 */ 5849 void gap_advertisements_enable(int enabled){ 5850 hci_stack->le_advertisements_enabled = enabled != 0; 5851 hci_update_advertisements_enabled_for_current_roles(); 5852 hci_run(); 5853 } 5854 5855 #endif 5856 5857 void hci_le_set_own_address_type(uint8_t own_address_type){ 5858 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5859 if (own_address_type == hci_stack->le_own_addr_type) return; 5860 hci_stack->le_own_addr_type = own_address_type; 5861 5862 #ifdef ENABLE_LE_PERIPHERAL 5863 // update advertisement parameters, too 5864 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5865 hci_run(); 5866 #endif 5867 #ifdef ENABLE_LE_CENTRAL 5868 // note: we don't update scan parameters or modify ongoing connection attempts 5869 #endif 5870 } 5871 5872 #endif 5873 5874 uint8_t gap_disconnect(hci_con_handle_t handle){ 5875 hci_connection_t * conn = hci_connection_for_handle(handle); 5876 if (!conn){ 5877 hci_emit_disconnection_complete(handle, 0); 5878 return 0; 5879 } 5880 // ignore if already disconnected 5881 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5882 return 0; 5883 } 5884 conn->state = SEND_DISCONNECT; 5885 hci_run(); 5886 return 0; 5887 } 5888 5889 int gap_read_rssi(hci_con_handle_t con_handle){ 5890 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5891 if (hci_connection == NULL) return 0; 5892 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 5893 hci_run(); 5894 return 1; 5895 } 5896 5897 /** 5898 * @brief Get connection type 5899 * @param con_handle 5900 * @result connection_type 5901 */ 5902 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5903 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5904 if (!conn) return GAP_CONNECTION_INVALID; 5905 switch (conn->address_type){ 5906 case BD_ADDR_TYPE_LE_PUBLIC: 5907 case BD_ADDR_TYPE_LE_RANDOM: 5908 return GAP_CONNECTION_LE; 5909 case BD_ADDR_TYPE_SCO: 5910 return GAP_CONNECTION_SCO; 5911 case BD_ADDR_TYPE_ACL: 5912 return GAP_CONNECTION_ACL; 5913 default: 5914 return GAP_CONNECTION_INVALID; 5915 } 5916 } 5917 5918 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5919 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5920 if (!conn) return HCI_ROLE_INVALID; 5921 return (hci_role_t) conn->role; 5922 } 5923 5924 5925 #ifdef ENABLE_CLASSIC 5926 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5927 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5928 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5929 conn->request_role = role; 5930 hci_run(); 5931 return ERROR_CODE_SUCCESS; 5932 } 5933 #endif 5934 5935 #ifdef ENABLE_BLE 5936 5937 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){ 5938 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5939 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5940 5941 conn->le_phy_update_all_phys = all_phys; 5942 conn->le_phy_update_tx_phys = tx_phys; 5943 conn->le_phy_update_rx_phys = rx_phys; 5944 conn->le_phy_update_phy_options = phy_options; 5945 5946 hci_run(); 5947 5948 return 0; 5949 } 5950 5951 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5952 // check if already in list 5953 btstack_linked_list_iterator_t it; 5954 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5955 while (btstack_linked_list_iterator_has_next(&it)) { 5956 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5957 if (entry->address_type != address_type) { 5958 continue; 5959 } 5960 if (memcmp(entry->address, address, 6) != 0) { 5961 continue; 5962 } 5963 // disallow if already scheduled to add 5964 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5965 return ERROR_CODE_COMMAND_DISALLOWED; 5966 } 5967 // still on controller, but scheduled to remove -> re-add 5968 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5969 return ERROR_CODE_SUCCESS; 5970 } 5971 // alloc and add to list 5972 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5973 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5974 entry->address_type = address_type; 5975 (void)memcpy(entry->address, address, 6); 5976 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5977 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5978 return ERROR_CODE_SUCCESS; 5979 } 5980 5981 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5982 btstack_linked_list_iterator_t it; 5983 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5984 while (btstack_linked_list_iterator_has_next(&it)){ 5985 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5986 if (entry->address_type != address_type) { 5987 continue; 5988 } 5989 if (memcmp(entry->address, address, 6) != 0) { 5990 continue; 5991 } 5992 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5993 // remove from controller if already present 5994 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5995 } else { 5996 // directly remove entry from whitelist 5997 btstack_linked_list_iterator_remove(&it); 5998 btstack_memory_whitelist_entry_free(entry); 5999 } 6000 return ERROR_CODE_SUCCESS; 6001 } 6002 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6003 } 6004 6005 static void hci_whitelist_clear(void){ 6006 btstack_linked_list_iterator_t it; 6007 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6008 while (btstack_linked_list_iterator_has_next(&it)){ 6009 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6010 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6011 // remove from controller if already present 6012 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6013 continue; 6014 } 6015 // directly remove entry from whitelist 6016 btstack_linked_list_iterator_remove(&it); 6017 btstack_memory_whitelist_entry_free(entry); 6018 } 6019 } 6020 6021 /** 6022 * @brief Clear Whitelist 6023 * @returns 0 if ok 6024 */ 6025 uint8_t gap_whitelist_clear(void){ 6026 hci_whitelist_clear(); 6027 hci_run(); 6028 return ERROR_CODE_SUCCESS; 6029 } 6030 6031 /** 6032 * @brief Add Device to Whitelist 6033 * @param address_typ 6034 * @param address 6035 * @returns 0 if ok 6036 */ 6037 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6038 uint8_t status = hci_whitelist_add(address_type, address); 6039 if (status){ 6040 return status; 6041 } 6042 hci_run(); 6043 return ERROR_CODE_SUCCESS; 6044 } 6045 6046 /** 6047 * @brief Remove Device from Whitelist 6048 * @param address_typ 6049 * @param address 6050 * @returns 0 if ok 6051 */ 6052 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6053 uint8_t status = hci_whitelist_remove(address_type, address); 6054 if (status){ 6055 return status; 6056 } 6057 hci_run(); 6058 return ERROR_CODE_SUCCESS; 6059 } 6060 6061 #ifdef ENABLE_LE_CENTRAL 6062 /** 6063 * @brief Connect with Whitelist 6064 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6065 * @returns - if ok 6066 */ 6067 uint8_t gap_connect_with_whitelist(void){ 6068 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6069 return ERROR_CODE_COMMAND_DISALLOWED; 6070 } 6071 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6072 hci_run(); 6073 return ERROR_CODE_SUCCESS; 6074 } 6075 6076 /** 6077 * @brief Auto Connection Establishment - Start Connecting to device 6078 * @param address_typ 6079 * @param address 6080 * @returns 0 if ok 6081 */ 6082 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6083 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6084 return ERROR_CODE_COMMAND_DISALLOWED; 6085 } 6086 6087 uint8_t status = hci_whitelist_add(address_type, address); 6088 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6089 return status; 6090 } 6091 6092 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6093 6094 hci_run(); 6095 return ERROR_CODE_SUCCESS; 6096 } 6097 6098 /** 6099 * @brief Auto Connection Establishment - Stop Connecting to device 6100 * @param address_typ 6101 * @param address 6102 * @returns 0 if ok 6103 */ 6104 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6105 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6106 return ERROR_CODE_COMMAND_DISALLOWED; 6107 } 6108 6109 hci_whitelist_remove(address_type, address); 6110 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6111 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6112 } 6113 hci_run(); 6114 return 0; 6115 } 6116 6117 /** 6118 * @brief Auto Connection Establishment - Stop everything 6119 * @note Convenience function to stop all active auto connection attempts 6120 */ 6121 uint8_t gap_auto_connection_stop_all(void){ 6122 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6123 return ERROR_CODE_COMMAND_DISALLOWED; 6124 } 6125 hci_whitelist_clear(); 6126 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6127 hci_run(); 6128 return ERROR_CODE_SUCCESS; 6129 } 6130 6131 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6132 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6133 if (!conn) return 0; 6134 return conn->le_connection_interval; 6135 } 6136 #endif 6137 #endif 6138 6139 #ifdef ENABLE_CLASSIC 6140 /** 6141 * @brief Set Extended Inquiry Response data 6142 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6143 * @note has to be done before stack starts up 6144 */ 6145 void gap_set_extended_inquiry_response(const uint8_t * data){ 6146 hci_stack->eir_data = data; 6147 } 6148 6149 /** 6150 * @brief Start GAP Classic Inquiry 6151 * @param duration in 1.28s units 6152 * @return 0 if ok 6153 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6154 */ 6155 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6156 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6157 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6158 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6159 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6160 } 6161 hci_stack->inquiry_state = duration_in_1280ms_units; 6162 hci_run(); 6163 return 0; 6164 } 6165 6166 /** 6167 * @brief Stop GAP Classic Inquiry 6168 * @returns 0 if ok 6169 */ 6170 int gap_inquiry_stop(void){ 6171 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6172 // emit inquiry complete event, before it even started 6173 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6174 hci_emit_event(event, sizeof(event), 1); 6175 return 0; 6176 } 6177 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6178 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6179 hci_run(); 6180 return 0; 6181 } 6182 6183 void gap_inquiry_set_lap(uint32_t lap){ 6184 hci_stack->inquiry_lap = lap; 6185 } 6186 6187 6188 /** 6189 * @brief Remote Name Request 6190 * @param addr 6191 * @param page_scan_repetition_mode 6192 * @param clock_offset only used when bit 15 is set 6193 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6194 */ 6195 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6196 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6197 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6198 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6199 hci_stack->remote_name_clock_offset = clock_offset; 6200 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6201 hci_run(); 6202 return 0; 6203 } 6204 6205 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6206 hci_stack->gap_pairing_state = state; 6207 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6208 hci_run(); 6209 return 0; 6210 } 6211 6212 /** 6213 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6214 * @param addr 6215 * @param pin_data 6216 * @param pin_len 6217 * @return 0 if ok 6218 */ 6219 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6220 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6221 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6222 hci_stack->gap_pairing_pin_len = pin_len; 6223 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6224 } 6225 6226 /** 6227 * @brief Legacy Pairing Pin Code Response 6228 * @param addr 6229 * @param pin 6230 * @return 0 if ok 6231 */ 6232 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6233 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6234 } 6235 6236 /** 6237 * @brief Abort Legacy Pairing 6238 * @param addr 6239 * @param pin 6240 * @return 0 if ok 6241 */ 6242 int gap_pin_code_negative(bd_addr_t addr){ 6243 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6244 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6245 } 6246 6247 /** 6248 * @brief SSP Passkey Response 6249 * @param addr 6250 * @param passkey 6251 * @return 0 if ok 6252 */ 6253 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6254 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6255 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6256 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6257 } 6258 6259 /** 6260 * @brief Abort SSP Passkey Entry/Pairing 6261 * @param addr 6262 * @param pin 6263 * @return 0 if ok 6264 */ 6265 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6266 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6267 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6268 } 6269 6270 /** 6271 * @brief Accept SSP Numeric Comparison 6272 * @param addr 6273 * @param passkey 6274 * @return 0 if ok 6275 */ 6276 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6277 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6278 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6279 } 6280 6281 /** 6282 * @brief Abort SSP Numeric Comparison/Pairing 6283 * @param addr 6284 * @param pin 6285 * @return 0 if ok 6286 */ 6287 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6288 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6289 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6290 } 6291 6292 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6293 6294 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6295 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6296 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6297 connectionSetAuthenticationFlags(conn, flag); 6298 hci_run(); 6299 return ERROR_CODE_SUCCESS; 6300 } 6301 6302 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6303 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_REPLY); 6304 } 6305 6306 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6307 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6308 } 6309 #endif 6310 6311 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6312 /** 6313 * @brief Report Remote OOB Data 6314 * @param bd_addr 6315 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6316 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6317 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6318 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6319 */ 6320 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){ 6321 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6322 if (connection == NULL) { 6323 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6324 } 6325 connection->classic_oob_c_192 = c_192; 6326 connection->classic_oob_r_192 = r_192; 6327 connection->classic_oob_c_256 = c_256; 6328 connection->classic_oob_r_256 = r_256; 6329 return ERROR_CODE_SUCCESS; 6330 } 6331 /** 6332 * @brief Generate new OOB data 6333 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6334 */ 6335 void gap_ssp_generate_oob_data(void){ 6336 hci_stack->classic_read_local_oob_data = true; 6337 hci_run(); 6338 } 6339 6340 #endif 6341 6342 /** 6343 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6344 * @param inquiry_mode see bluetooth_defines.h 6345 */ 6346 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6347 hci_stack->inquiry_mode = inquiry_mode; 6348 } 6349 6350 /** 6351 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6352 */ 6353 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6354 hci_stack->sco_voice_setting = voice_setting; 6355 } 6356 6357 /** 6358 * @brief Get SCO Voice Setting 6359 * @return current voice setting 6360 */ 6361 uint16_t hci_get_sco_voice_setting(void){ 6362 return hci_stack->sco_voice_setting; 6363 } 6364 6365 static int hci_have_usb_transport(void){ 6366 if (!hci_stack->hci_transport) return 0; 6367 const char * transport_name = hci_stack->hci_transport->name; 6368 if (!transport_name) return 0; 6369 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6370 } 6371 6372 /** @brief Get SCO packet length for current SCO Voice setting 6373 * @note Using SCO packets of the exact length is required for USB transfer 6374 * @return Length of SCO packets in bytes (not audio frames) 6375 */ 6376 int hci_get_sco_packet_length(void){ 6377 int sco_packet_length = 0; 6378 6379 #ifdef ENABLE_SCO_OVER_HCI 6380 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6381 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6382 6383 if (hci_have_usb_transport()){ 6384 // see Core Spec for H2 USB Transfer. 6385 // 3 byte SCO header + 24 bytes per connection 6386 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6387 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6388 } else { 6389 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6390 sco_packet_length = 3 + 60 * multiplier; 6391 // assert that it still fits inside an SCO buffer 6392 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6393 sco_packet_length = 3 + 60; 6394 } 6395 } 6396 #endif 6397 6398 #ifdef HAVE_SCO_TRANSPORT 6399 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6400 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6401 sco_packet_length = 3 + 60 * multiplier; 6402 #endif 6403 return sco_packet_length; 6404 } 6405 6406 /** 6407 * @brief Sets the master/slave policy 6408 * @param policy (0: attempt to become master, 1: let connecting device decide) 6409 */ 6410 void hci_set_master_slave_policy(uint8_t policy){ 6411 hci_stack->master_slave_policy = policy; 6412 } 6413 6414 #endif 6415 6416 HCI_STATE hci_get_state(void){ 6417 return hci_stack->state; 6418 } 6419 6420 #ifdef ENABLE_CLASSIC 6421 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6422 hci_stack->gap_classic_accept_callback = accept_callback; 6423 } 6424 #endif 6425 6426 /** 6427 * @brief Set callback for Bluetooth Hardware Error 6428 */ 6429 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6430 hci_stack->hardware_error_callback = fn; 6431 } 6432 6433 void hci_disconnect_all(void){ 6434 btstack_linked_list_iterator_t it; 6435 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6436 while (btstack_linked_list_iterator_has_next(&it)){ 6437 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6438 if (con->state == SENT_DISCONNECT) continue; 6439 con->state = SEND_DISCONNECT; 6440 } 6441 hci_run(); 6442 } 6443 6444 uint16_t hci_get_manufacturer(void){ 6445 return hci_stack->manufacturer; 6446 } 6447 6448 #ifdef ENABLE_BLE 6449 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6450 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6451 if (!hci_con) return NULL; 6452 return &hci_con->sm_connection; 6453 } 6454 6455 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6456 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6457 #endif 6458 6459 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6460 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6461 if (hci_connection == NULL) return 0; 6462 if (hci_is_le_connection(hci_connection)){ 6463 #ifdef ENABLE_BLE 6464 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6465 if (sm_conn->sm_connection_encrypted) { 6466 return sm_conn->sm_actual_encryption_key_size; 6467 } 6468 #endif 6469 } else { 6470 #ifdef ENABLE_CLASSIC 6471 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6472 return hci_connection->encryption_key_size; 6473 } 6474 #endif 6475 } 6476 return 0; 6477 } 6478 6479 int gap_authenticated(hci_con_handle_t con_handle){ 6480 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6481 if (hci_connection == NULL) return 0; 6482 6483 switch (hci_connection->address_type){ 6484 #ifdef ENABLE_BLE 6485 case BD_ADDR_TYPE_LE_PUBLIC: 6486 case BD_ADDR_TYPE_LE_RANDOM: 6487 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6488 return hci_connection->sm_connection.sm_connection_authenticated; 6489 #endif 6490 #ifdef ENABLE_CLASSIC 6491 case BD_ADDR_TYPE_SCO: 6492 case BD_ADDR_TYPE_ACL: 6493 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6494 #endif 6495 default: 6496 return 0; 6497 } 6498 } 6499 6500 int gap_secure_connection(hci_con_handle_t con_handle){ 6501 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6502 if (hci_connection == NULL) return 0; 6503 6504 switch (hci_connection->address_type){ 6505 #ifdef ENABLE_BLE 6506 case BD_ADDR_TYPE_LE_PUBLIC: 6507 case BD_ADDR_TYPE_LE_RANDOM: 6508 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6509 return hci_connection->sm_connection.sm_connection_sc; 6510 #endif 6511 #ifdef ENABLE_CLASSIC 6512 case BD_ADDR_TYPE_SCO: 6513 case BD_ADDR_TYPE_ACL: 6514 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6515 #endif 6516 default: 6517 return 0; 6518 } 6519 } 6520 6521 bool gap_bonded(hci_con_handle_t con_handle){ 6522 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6523 if (hci_connection == NULL) return 0; 6524 6525 #ifdef ENABLE_CLASSIC 6526 link_key_t link_key; 6527 link_key_type_t link_key_type; 6528 #endif 6529 switch (hci_connection->address_type){ 6530 #ifdef ENABLE_BLE 6531 case BD_ADDR_TYPE_LE_PUBLIC: 6532 case BD_ADDR_TYPE_LE_RANDOM: 6533 return hci_connection->sm_connection.sm_le_db_index >= 0; 6534 #endif 6535 #ifdef ENABLE_CLASSIC 6536 case BD_ADDR_TYPE_SCO: 6537 case BD_ADDR_TYPE_ACL: 6538 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6539 #endif 6540 default: 6541 return false; 6542 } 6543 } 6544 6545 #ifdef ENABLE_BLE 6546 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6547 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6548 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6549 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6550 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6551 return sm_conn->sm_connection_authorization_state; 6552 } 6553 #endif 6554 6555 #ifdef ENABLE_CLASSIC 6556 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){ 6557 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6558 if (!conn) return GAP_CONNECTION_INVALID; 6559 conn->sniff_min_interval = sniff_min_interval; 6560 conn->sniff_max_interval = sniff_max_interval; 6561 conn->sniff_attempt = sniff_attempt; 6562 conn->sniff_timeout = sniff_timeout; 6563 hci_run(); 6564 return 0; 6565 } 6566 6567 /** 6568 * @brief Exit Sniff mode 6569 * @param con_handle 6570 @ @return 0 if ok 6571 */ 6572 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6573 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6574 if (!conn) return GAP_CONNECTION_INVALID; 6575 conn->sniff_min_interval = 0xffff; 6576 hci_run(); 6577 return 0; 6578 } 6579 6580 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){ 6581 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6582 if (!conn) return GAP_CONNECTION_INVALID; 6583 conn->sniff_subrating_max_latency = max_latency; 6584 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6585 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6586 hci_run(); 6587 return ERROR_CODE_SUCCESS; 6588 } 6589 6590 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){ 6591 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6592 if (!conn) return GAP_CONNECTION_INVALID; 6593 conn->qos_service_type = service_type; 6594 conn->qos_token_rate = token_rate; 6595 conn->qos_peak_bandwidth = peak_bandwidth; 6596 conn->qos_latency = latency; 6597 conn->qos_delay_variation = delay_variation; 6598 hci_run(); 6599 return ERROR_CODE_SUCCESS; 6600 } 6601 6602 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6603 hci_stack->new_page_scan_interval = page_scan_interval; 6604 hci_stack->new_page_scan_window = page_scan_window; 6605 hci_run(); 6606 } 6607 6608 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6609 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6610 hci_run(); 6611 } 6612 6613 #endif 6614 6615 void hci_halting_defer(void){ 6616 if (hci_stack->state != HCI_STATE_HALTING) return; 6617 switch (hci_stack->substate){ 6618 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6619 case HCI_HALTING_CLOSE: 6620 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6621 break; 6622 default: 6623 break; 6624 } 6625 } 6626 6627 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6628 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6629 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6630 if (le_device_db_index >= le_device_db_max_count()) return; 6631 uint8_t offset = le_device_db_index >> 3; 6632 uint8_t mask = 1 << (le_device_db_index & 7); 6633 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6634 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6635 // note: go back to remove entries, otherwise, a remove + add will skip the add 6636 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6637 } 6638 } 6639 6640 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6641 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6642 if (le_device_db_index >= le_device_db_max_count()) return; 6643 uint8_t offset = le_device_db_index >> 3; 6644 uint8_t mask = 1 << (le_device_db_index & 7); 6645 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6646 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6647 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6648 } 6649 } 6650 6651 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6652 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6653 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6654 } 6655 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6656 // restart le resolving list update 6657 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6658 } 6659 return ERROR_CODE_SUCCESS; 6660 } 6661 #endif 6662 6663 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6664 void hci_setup_test_connections_fuzz(void){ 6665 hci_connection_t * conn; 6666 6667 // default address: 66:55:44:33:00:01 6668 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6669 6670 // setup Controller info 6671 hci_stack->num_cmd_packets = 255; 6672 hci_stack->acl_packets_total_num = 255; 6673 6674 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6675 addr[5] = 0x01; 6676 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6677 conn->con_handle = addr[5]; 6678 conn->role = HCI_ROLE_SLAVE; 6679 conn->state = RECEIVED_CONNECTION_REQUEST; 6680 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6681 6682 // setup incoming Classic SCO connection with con handle 0x0002 6683 addr[5] = 0x02; 6684 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6685 conn->con_handle = addr[5]; 6686 conn->role = HCI_ROLE_SLAVE; 6687 conn->state = RECEIVED_CONNECTION_REQUEST; 6688 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6689 6690 // setup ready Classic ACL connection with con handle 0x0003 6691 addr[5] = 0x03; 6692 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6693 conn->con_handle = addr[5]; 6694 conn->role = HCI_ROLE_SLAVE; 6695 conn->state = OPEN; 6696 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6697 6698 // setup ready Classic SCO connection with con handle 0x0004 6699 addr[5] = 0x04; 6700 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6701 conn->con_handle = addr[5]; 6702 conn->role = HCI_ROLE_SLAVE; 6703 conn->state = OPEN; 6704 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6705 6706 // setup ready LE ACL connection with con handle 0x005 and public address 6707 addr[5] = 0x05; 6708 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6709 conn->con_handle = addr[5]; 6710 conn->role = HCI_ROLE_SLAVE; 6711 conn->state = OPEN; 6712 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6713 conn->sm_connection.sm_connection_encrypted = 1; 6714 } 6715 6716 void hci_free_connections_fuzz(void){ 6717 btstack_linked_list_iterator_t it; 6718 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6719 while (btstack_linked_list_iterator_has_next(&it)){ 6720 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6721 btstack_linked_list_iterator_remove(&it); 6722 btstack_memory_hci_connection_free(con); 6723 } 6724 } 6725 void hci_simulate_working_fuzz(void){ 6726 hci_init_done(); 6727 hci_stack->num_cmd_packets = 255; 6728 } 6729 #endif 6730