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 #endif 63 64 #include <stdarg.h> 65 #include <string.h> 66 #include <stdio.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 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 98 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 99 #define HCI_RESET_RESEND_TIMEOUT_MS 200 100 #endif 101 102 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 103 #ifndef GAP_INQUIRY_MAX_NAME_LEN 104 #define GAP_INQUIRY_MAX_NAME_LEN 32 105 #endif 106 107 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 108 #define GAP_INQUIRY_DURATION_MIN 0x01 109 #define GAP_INQUIRY_DURATION_MAX 0x30 110 #define GAP_INQUIRY_STATE_ACTIVE 0x80 111 #define GAP_INQUIRY_STATE_IDLE 0 112 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 113 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 114 115 // GAP Remote Name Request 116 #define GAP_REMOTE_NAME_STATE_IDLE 0 117 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 118 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 119 120 // GAP Pairing 121 #define GAP_PAIRING_STATE_IDLE 0 122 #define GAP_PAIRING_STATE_SEND_PIN 1 123 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 124 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 125 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 126 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 127 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 128 129 130 // prototypes 131 #ifdef ENABLE_CLASSIC 132 static void hci_update_scan_enable(void); 133 static void hci_emit_discoverable_enabled(uint8_t enabled); 134 static int hci_local_ssp_activated(void); 135 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 136 static bool hci_ssp_supported(hci_connection_t * connection); 137 static void hci_notify_if_sco_can_send_now(void); 138 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 139 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 140 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 141 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 142 static void hci_connection_timestamp(hci_connection_t *connection); 143 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 144 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 145 #endif 146 147 static int hci_power_control_on(void); 148 static void hci_power_control_off(void); 149 static void hci_state_reset(void); 150 static void hci_emit_transport_packet_sent(void); 151 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 152 static void hci_emit_nr_connections_changed(void); 153 static void hci_emit_hci_open_failed(void); 154 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 155 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 156 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 157 static void hci_run(void); 158 static int hci_is_le_connection(hci_connection_t * connection); 159 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 160 161 #ifdef ENABLE_CLASSIC 162 static int hci_have_usb_transport(void); 163 #endif 164 165 #ifdef ENABLE_BLE 166 #ifdef ENABLE_LE_CENTRAL 167 // called from test/ble_client/advertising_data_parser.c 168 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 169 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 170 static hci_connection_t * gap_get_outgoing_connection(void); 171 #endif 172 #endif 173 174 // the STACK is here 175 #ifndef HAVE_MALLOC 176 static hci_stack_t hci_stack_static; 177 #endif 178 static hci_stack_t * hci_stack = NULL; 179 180 #ifdef ENABLE_CLASSIC 181 // default name 182 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 183 184 // test helper 185 static uint8_t disable_l2cap_timeouts = 0; 186 #endif 187 188 /** 189 * create connection for given address 190 * 191 * @return connection OR NULL, if no memory left 192 */ 193 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 194 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 195 hci_connection_t * conn = btstack_memory_hci_connection_get(); 196 if (!conn) return NULL; 197 bd_addr_copy(conn->address, addr); 198 conn->address_type = addr_type; 199 conn->con_handle = 0xffff; 200 conn->authentication_flags = AUTH_FLAGS_NONE; 201 conn->bonding_flags = 0; 202 conn->requested_security_level = LEVEL_0; 203 #ifdef ENABLE_CLASSIC 204 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 205 btstack_run_loop_set_timer_context(&conn->timeout, conn); 206 hci_connection_timestamp(conn); 207 #endif 208 conn->acl_recombination_length = 0; 209 conn->acl_recombination_pos = 0; 210 conn->num_packets_sent = 0; 211 212 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 213 #ifdef ENABLE_BLE 214 conn->le_phy_update_all_phys = 0xff; 215 #endif 216 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 217 conn->le_max_tx_octets = 27; 218 #endif 219 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 220 return conn; 221 } 222 223 224 /** 225 * get le connection parameter range 226 * 227 * @return le connection parameter range struct 228 */ 229 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 230 *range = hci_stack->le_connection_parameter_range; 231 } 232 233 /** 234 * set le connection parameter range 235 * 236 */ 237 238 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 239 hci_stack->le_connection_parameter_range = *range; 240 } 241 242 /** 243 * @brief Test if connection parameters are inside in existing rage 244 * @param conn_interval_min (unit: 1.25ms) 245 * @param conn_interval_max (unit: 1.25ms) 246 * @param conn_latency 247 * @param supervision_timeout (unit: 10ms) 248 * @returns 1 if included 249 */ 250 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){ 251 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 252 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 253 254 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 255 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 256 257 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 258 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 259 260 return 1; 261 } 262 263 /** 264 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 265 * @note: default: 1 266 * @param max_peripheral_connections 267 */ 268 #ifdef ENABLE_LE_PERIPHERAL 269 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 270 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 271 } 272 #endif 273 274 /** 275 * get hci connections iterator 276 * 277 * @return hci connections iterator 278 */ 279 280 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 281 btstack_linked_list_iterator_init(it, &hci_stack->connections); 282 } 283 284 /** 285 * get connection for a given handle 286 * 287 * @return connection OR NULL, if not found 288 */ 289 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 290 btstack_linked_list_iterator_t it; 291 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 292 while (btstack_linked_list_iterator_has_next(&it)){ 293 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 294 if ( item->con_handle == con_handle ) { 295 return item; 296 } 297 } 298 return NULL; 299 } 300 301 /** 302 * get connection for given address 303 * 304 * @return connection OR NULL, if not found 305 */ 306 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 307 btstack_linked_list_iterator_t it; 308 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 309 while (btstack_linked_list_iterator_has_next(&it)){ 310 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 311 if (connection->address_type != addr_type) continue; 312 if (memcmp(addr, connection->address, 6) != 0) continue; 313 return connection; 314 } 315 return NULL; 316 } 317 318 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 319 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 320 } 321 322 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 323 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 324 } 325 326 #ifdef ENABLE_CLASSIC 327 328 #ifdef ENABLE_SCO_OVER_HCI 329 static int hci_number_sco_connections(void){ 330 int connections = 0; 331 btstack_linked_list_iterator_t it; 332 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 333 while (btstack_linked_list_iterator_has_next(&it)){ 334 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 335 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 336 connections++; 337 } 338 return connections; 339 } 340 #endif 341 342 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 343 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 344 #ifdef HAVE_EMBEDDED_TICK 345 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 346 // connections might be timed out 347 hci_emit_l2cap_check_timeout(connection); 348 } 349 #else 350 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 351 // connections might be timed out 352 hci_emit_l2cap_check_timeout(connection); 353 } 354 #endif 355 } 356 357 static void hci_connection_timestamp(hci_connection_t *connection){ 358 #ifdef HAVE_EMBEDDED_TICK 359 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 360 #else 361 connection->timestamp = btstack_run_loop_get_time_ms(); 362 #endif 363 } 364 365 /** 366 * add authentication flags and reset timer 367 * @note: assumes classic connection 368 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 369 */ 370 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 371 bd_addr_t addr; 372 reverse_bd_addr(bd_addr, addr); 373 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 374 if (conn) { 375 connectionSetAuthenticationFlags(conn, flags); 376 hci_connection_timestamp(conn); 377 } 378 } 379 380 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 381 hci_connection_t * conn = hci_connection_for_handle(handle); 382 if (!conn) return 0; 383 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 384 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 385 return 0; 386 } 387 388 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 389 if (!hci_stack->link_key_db) return; 390 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 391 hci_stack->link_key_db->delete_link_key(addr); 392 } 393 394 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 395 if (!hci_stack->link_key_db) return; 396 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 397 hci_stack->link_key_db->put_link_key(addr, link_key, type); 398 } 399 400 void gap_delete_all_link_keys(void){ 401 bd_addr_t addr; 402 link_key_t link_key; 403 link_key_type_t type; 404 btstack_link_key_iterator_t it; 405 int ok = gap_link_key_iterator_init(&it); 406 if (!ok) { 407 log_error("could not initialize iterator"); 408 return; 409 } 410 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 411 gap_drop_link_key_for_bd_addr(addr); 412 } 413 gap_link_key_iterator_done(&it); 414 } 415 416 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 417 if (!hci_stack->link_key_db) return 0; 418 if (!hci_stack->link_key_db->iterator_init) return 0; 419 return hci_stack->link_key_db->iterator_init(it); 420 } 421 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){ 422 if (!hci_stack->link_key_db) return 0; 423 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 424 } 425 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 426 if (!hci_stack->link_key_db) return; 427 hci_stack->link_key_db->iterator_done(it); 428 } 429 #endif 430 431 static int hci_is_le_connection(hci_connection_t * connection){ 432 switch (connection->address_type){ 433 case BD_ADDR_TYPE_LE_PUBLIC: 434 case BD_ADDR_TYPE_LE_RANDOM: 435 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 436 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 437 return 1; 438 default: 439 return 0; 440 } 441 } 442 443 /** 444 * count connections 445 */ 446 static int nr_hci_connections(void){ 447 int count = 0; 448 btstack_linked_item_t *it; 449 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 450 count++; 451 } 452 return count; 453 } 454 455 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 456 457 unsigned int num_packets_sent_classic = 0; 458 unsigned int num_packets_sent_le = 0; 459 460 btstack_linked_item_t *it; 461 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 462 hci_connection_t * connection = (hci_connection_t *) it; 463 if (hci_is_le_connection(connection)){ 464 num_packets_sent_le += connection->num_packets_sent; 465 } 466 if (connection->address_type == BD_ADDR_TYPE_ACL){ 467 num_packets_sent_classic += connection->num_packets_sent; 468 } 469 } 470 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 471 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 472 int free_slots_le = 0; 473 474 if (free_slots_classic < 0){ 475 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); 476 return 0; 477 } 478 479 if (hci_stack->le_acl_packets_total_num){ 480 // if we have LE slots, they are used 481 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 482 if (free_slots_le < 0){ 483 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); 484 return 0; 485 } 486 } else { 487 // otherwise, classic slots are used for LE, too 488 free_slots_classic -= num_packets_sent_le; 489 if (free_slots_classic < 0){ 490 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); 491 return 0; 492 } 493 } 494 495 switch (address_type){ 496 case BD_ADDR_TYPE_UNKNOWN: 497 log_error("hci_number_free_acl_slots: unknown address type"); 498 return 0; 499 500 case BD_ADDR_TYPE_ACL: 501 return free_slots_classic; 502 503 default: 504 if (hci_stack->le_acl_packets_total_num){ 505 return free_slots_le; 506 } 507 return free_slots_classic; 508 } 509 } 510 511 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 512 // get connection type 513 hci_connection_t * connection = hci_connection_for_handle(con_handle); 514 if (!connection){ 515 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 516 return 0; 517 } 518 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 519 } 520 521 #ifdef ENABLE_CLASSIC 522 static int hci_number_free_sco_slots(void){ 523 unsigned int num_sco_packets_sent = 0; 524 btstack_linked_item_t *it; 525 if (hci_stack->synchronous_flow_control_enabled){ 526 // explicit flow control 527 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 528 hci_connection_t * connection = (hci_connection_t *) it; 529 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 530 num_sco_packets_sent += connection->num_packets_sent; 531 } 532 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 533 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 534 return 0; 535 } 536 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 537 } else { 538 // implicit flow control -- TODO 539 int num_ready = 0; 540 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 541 hci_connection_t * connection = (hci_connection_t *) it; 542 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 543 if (connection->sco_tx_ready == 0) continue; 544 num_ready++; 545 } 546 return num_ready; 547 } 548 } 549 #endif 550 551 // only used to send HCI Host Number Completed Packets 552 static int hci_can_send_comand_packet_transport(void){ 553 if (hci_stack->hci_packet_buffer_reserved) return 0; 554 555 // check for async hci transport implementations 556 if (hci_stack->hci_transport->can_send_packet_now){ 557 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 558 return 0; 559 } 560 } 561 return 1; 562 } 563 564 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 565 int hci_can_send_command_packet_now(void){ 566 if (hci_can_send_comand_packet_transport() == 0) return 0; 567 return hci_stack->num_cmd_packets > 0; 568 } 569 570 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 571 // check for async hci transport implementations 572 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 573 return hci_stack->hci_transport->can_send_packet_now(packet_type); 574 } 575 576 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 577 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 578 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 579 } 580 581 int hci_can_send_acl_le_packet_now(void){ 582 if (hci_stack->hci_packet_buffer_reserved) return 0; 583 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 584 } 585 586 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 587 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 588 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 589 } 590 591 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 592 if (hci_stack->hci_packet_buffer_reserved) return 0; 593 return hci_can_send_prepared_acl_packet_now(con_handle); 594 } 595 596 #ifdef ENABLE_CLASSIC 597 int hci_can_send_acl_classic_packet_now(void){ 598 if (hci_stack->hci_packet_buffer_reserved) return 0; 599 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 600 } 601 602 int hci_can_send_prepared_sco_packet_now(void){ 603 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 604 if (hci_have_usb_transport()){ 605 return hci_stack->sco_can_send_now; 606 } else { 607 return hci_number_free_sco_slots() > 0; 608 } 609 } 610 611 int hci_can_send_sco_packet_now(void){ 612 if (hci_stack->hci_packet_buffer_reserved) return 0; 613 return hci_can_send_prepared_sco_packet_now(); 614 } 615 616 void hci_request_sco_can_send_now_event(void){ 617 hci_stack->sco_waiting_for_can_send_now = 1; 618 hci_notify_if_sco_can_send_now(); 619 } 620 #endif 621 622 // used for internal checks in l2cap.c 623 int hci_is_packet_buffer_reserved(void){ 624 return hci_stack->hci_packet_buffer_reserved; 625 } 626 627 // reserves outgoing packet buffer. @returns 1 if successful 628 int hci_reserve_packet_buffer(void){ 629 if (hci_stack->hci_packet_buffer_reserved) { 630 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 631 return 0; 632 } 633 hci_stack->hci_packet_buffer_reserved = 1; 634 return 1; 635 } 636 637 void hci_release_packet_buffer(void){ 638 hci_stack->hci_packet_buffer_reserved = 0; 639 } 640 641 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 642 static int hci_transport_synchronous(void){ 643 return hci_stack->hci_transport->can_send_packet_now == NULL; 644 } 645 646 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 647 648 // 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); 649 650 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 651 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 652 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0)){ 653 max_acl_data_packet_length = hci_stack->le_data_packets_length; 654 } 655 656 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 657 if (hci_is_le_connection(connection)){ 658 max_acl_data_packet_length = connection->le_max_tx_octets; 659 } 660 #endif 661 662 log_debug("hci_send_acl_packet_fragments entered"); 663 664 int err; 665 // multiple packets could be send on a synchronous HCI transport 666 while (true){ 667 668 log_debug("hci_send_acl_packet_fragments loop entered"); 669 670 // get current data 671 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 672 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 673 int more_fragments = 0; 674 675 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 676 if (current_acl_data_packet_length > max_acl_data_packet_length){ 677 more_fragments = 1; 678 current_acl_data_packet_length = max_acl_data_packet_length; 679 } 680 681 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 682 if (acl_header_pos > 0){ 683 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 684 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 685 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 686 } 687 688 // update header len 689 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 690 691 // count packet 692 connection->num_packets_sent++; 693 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 694 695 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 696 if (more_fragments){ 697 // update start of next fragment to send 698 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 699 } else { 700 // done 701 hci_stack->acl_fragmentation_pos = 0; 702 hci_stack->acl_fragmentation_total_size = 0; 703 } 704 705 // send packet 706 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 707 const int size = current_acl_data_packet_length + 4; 708 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 709 hci_stack->acl_fragmentation_tx_active = 1; 710 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 711 712 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 713 714 // done yet? 715 if (!more_fragments) break; 716 717 // can send more? 718 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 719 } 720 721 log_debug("hci_send_acl_packet_fragments loop over"); 722 723 // release buffer now for synchronous transport 724 if (hci_transport_synchronous()){ 725 hci_stack->acl_fragmentation_tx_active = 0; 726 hci_release_packet_buffer(); 727 hci_emit_transport_packet_sent(); 728 } 729 730 return err; 731 } 732 733 // pre: caller has reserved the packet buffer 734 int hci_send_acl_packet_buffer(int size){ 735 736 // log_info("hci_send_acl_packet_buffer size %u", size); 737 738 if (!hci_stack->hci_packet_buffer_reserved) { 739 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 740 return 0; 741 } 742 743 uint8_t * packet = hci_stack->hci_packet_buffer; 744 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 745 746 // check for free places on Bluetooth module 747 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 748 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 749 hci_release_packet_buffer(); 750 hci_emit_transport_packet_sent(); 751 return BTSTACK_ACL_BUFFERS_FULL; 752 } 753 754 hci_connection_t *connection = hci_connection_for_handle( con_handle); 755 if (!connection) { 756 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 757 hci_release_packet_buffer(); 758 hci_emit_transport_packet_sent(); 759 return 0; 760 } 761 762 #ifdef ENABLE_CLASSIC 763 hci_connection_timestamp(connection); 764 #endif 765 766 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 767 768 // setup data 769 hci_stack->acl_fragmentation_total_size = size; 770 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 771 772 return hci_send_acl_packet_fragments(connection); 773 } 774 775 #ifdef ENABLE_CLASSIC 776 // pre: caller has reserved the packet buffer 777 int hci_send_sco_packet_buffer(int size){ 778 779 // log_info("hci_send_acl_packet_buffer size %u", size); 780 781 if (!hci_stack->hci_packet_buffer_reserved) { 782 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 783 return 0; 784 } 785 786 uint8_t * packet = hci_stack->hci_packet_buffer; 787 788 // skip checks in loopback mode 789 if (!hci_stack->loopback_mode){ 790 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 791 792 // check for free places on Bluetooth module 793 if (!hci_can_send_prepared_sco_packet_now()) { 794 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 795 hci_release_packet_buffer(); 796 hci_emit_transport_packet_sent(); 797 return BTSTACK_ACL_BUFFERS_FULL; 798 } 799 800 // track send packet in connection struct 801 hci_connection_t *connection = hci_connection_for_handle( con_handle); 802 if (!connection) { 803 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 804 hci_release_packet_buffer(); 805 hci_emit_transport_packet_sent(); 806 return 0; 807 } 808 809 if (hci_have_usb_transport()){ 810 // token used 811 hci_stack->sco_can_send_now = 0; 812 } else { 813 if (hci_stack->synchronous_flow_control_enabled){ 814 connection->num_packets_sent++; 815 } else { 816 connection->sco_tx_ready--; 817 } 818 } 819 } 820 821 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 822 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 823 824 if (hci_transport_synchronous()){ 825 hci_release_packet_buffer(); 826 hci_emit_transport_packet_sent(); 827 } 828 829 return err; 830 } 831 #endif 832 833 static void acl_handler(uint8_t *packet, int size){ 834 835 // log_info("acl_handler: size %u", size); 836 837 // get info 838 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 839 hci_connection_t *conn = hci_connection_for_handle(con_handle); 840 uint8_t acl_flags = READ_ACL_FLAGS(packet); 841 uint16_t acl_length = READ_ACL_LENGTH(packet); 842 843 // ignore non-registered handle 844 if (!conn){ 845 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 846 return; 847 } 848 849 // assert packet is complete 850 if ((acl_length + 4) != size){ 851 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 852 return; 853 } 854 855 #ifdef ENABLE_CLASSIC 856 // update idle timestamp 857 hci_connection_timestamp(conn); 858 #endif 859 860 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 861 hci_stack->host_completed_packets = 1; 862 conn->num_packets_completed++; 863 #endif 864 865 // handle different packet types 866 switch (acl_flags & 0x03) { 867 868 case 0x01: // continuation fragment 869 870 // sanity checks 871 if (conn->acl_recombination_pos == 0) { 872 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 873 return; 874 } 875 if ((conn->acl_recombination_pos + acl_length) > (4 + HCI_ACL_BUFFER_SIZE)){ 876 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 877 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 878 conn->acl_recombination_pos = 0; 879 return; 880 } 881 882 // append fragment payload (header already stored) 883 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 884 &packet[4], acl_length); 885 conn->acl_recombination_pos += acl_length; 886 887 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 888 // conn->acl_recombination_pos, conn->acl_recombination_length); 889 890 // forward complete L2CAP packet if complete. 891 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4 + 4)){ // pos already incl. ACL header 892 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 893 // reset recombination buffer 894 conn->acl_recombination_length = 0; 895 conn->acl_recombination_pos = 0; 896 } 897 break; 898 899 case 0x02: { // first fragment 900 901 // sanity check 902 if (conn->acl_recombination_pos) { 903 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 904 conn->acl_recombination_pos = 0; 905 } 906 907 // peek into L2CAP packet! 908 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 909 910 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 911 912 // compare fragment size to L2CAP packet size 913 if (acl_length >= (l2cap_length + 4)){ 914 // forward fragment as L2CAP packet 915 hci_emit_acl_packet(packet, acl_length + 4); 916 } else { 917 918 if (acl_length > HCI_ACL_BUFFER_SIZE){ 919 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 920 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 921 return; 922 } 923 924 // store first fragment and tweak acl length for complete package 925 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 926 packet, acl_length + 4); 927 conn->acl_recombination_pos = acl_length + 4; 928 conn->acl_recombination_length = l2cap_length; 929 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 930 } 931 break; 932 933 } 934 default: 935 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 936 return; 937 } 938 939 // execute main loop 940 hci_run(); 941 } 942 943 static void hci_shutdown_connection(hci_connection_t *conn){ 944 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 945 946 #ifdef ENABLE_CLASSIC 947 #ifdef ENABLE_SCO_OVER_HCI 948 int addr_type = conn->address_type; 949 #endif 950 #endif 951 952 btstack_run_loop_remove_timer(&conn->timeout); 953 954 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 955 btstack_memory_hci_connection_free( conn ); 956 957 // now it's gone 958 hci_emit_nr_connections_changed(); 959 960 #ifdef ENABLE_CLASSIC 961 #ifdef ENABLE_SCO_OVER_HCI 962 // update SCO 963 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 964 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 965 } 966 #endif 967 #endif 968 } 969 970 #ifdef ENABLE_CLASSIC 971 972 static const uint16_t packet_type_sizes[] = { 973 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 974 HCI_ACL_DH1_SIZE, 0, 0, 0, 975 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 976 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 977 }; 978 static const uint8_t packet_type_feature_requirement_bit[] = { 979 0, // 3 slot packets 980 1, // 5 slot packets 981 25, // EDR 2 mpbs 982 26, // EDR 3 mbps 983 39, // 3 slot EDR packts 984 40, // 5 slot EDR packet 985 }; 986 static const uint16_t packet_type_feature_packet_mask[] = { 987 0x0f00, // 3 slot packets 988 0xf000, // 5 slot packets 989 0x1102, // EDR 2 mpbs 990 0x2204, // EDR 3 mbps 991 0x0300, // 3 slot EDR packts 992 0x3000, // 5 slot EDR packet 993 }; 994 995 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 996 // enable packet types based on size 997 uint16_t packet_types = 0; 998 unsigned int i; 999 for (i=0;i<16;i++){ 1000 if (packet_type_sizes[i] == 0) continue; 1001 if (packet_type_sizes[i] <= buffer_size){ 1002 packet_types |= 1 << i; 1003 } 1004 } 1005 // disable packet types due to missing local supported features 1006 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1007 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1008 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1009 if (feature_set) continue; 1010 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1011 packet_types &= ~packet_type_feature_packet_mask[i]; 1012 } 1013 // flip bits for "may not be used" 1014 packet_types ^= 0x3306; 1015 return packet_types; 1016 } 1017 1018 uint16_t hci_usable_acl_packet_types(void){ 1019 return hci_stack->packet_types; 1020 } 1021 #endif 1022 1023 uint8_t* hci_get_outgoing_packet_buffer(void){ 1024 // hci packet buffer is >= acl data packet length 1025 return hci_stack->hci_packet_buffer; 1026 } 1027 1028 uint16_t hci_max_acl_data_packet_length(void){ 1029 return hci_stack->acl_data_packet_length; 1030 } 1031 1032 #ifdef ENABLE_CLASSIC 1033 int hci_extended_sco_link_supported(void){ 1034 // No. 31, byte 3, bit 7 1035 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1036 } 1037 #endif 1038 1039 int hci_non_flushable_packet_boundary_flag_supported(void){ 1040 // No. 54, byte 6, bit 6 1041 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 1042 } 1043 1044 static int gap_ssp_supported(void){ 1045 // No. 51, byte 6, bit 3 1046 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 1047 } 1048 1049 static int hci_classic_supported(void){ 1050 #ifdef ENABLE_CLASSIC 1051 // No. 37, byte 4, bit 5, = No BR/EDR Support 1052 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1053 #else 1054 return 0; 1055 #endif 1056 } 1057 1058 static int hci_le_supported(void){ 1059 #ifdef ENABLE_BLE 1060 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1061 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1062 #else 1063 return 0; 1064 #endif 1065 } 1066 1067 #ifdef ENABLE_BLE 1068 1069 /** 1070 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1071 */ 1072 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1073 *addr_type = hci_stack->le_own_addr_type; 1074 if (hci_stack->le_own_addr_type){ 1075 (void)memcpy(addr, hci_stack->le_random_address, 6); 1076 } else { 1077 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1078 } 1079 } 1080 1081 #ifdef ENABLE_LE_CENTRAL 1082 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1083 1084 int offset = 3; 1085 int num_reports = packet[offset]; 1086 offset += 1; 1087 1088 int i; 1089 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1090 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1091 for (i=0; (i<num_reports) && (offset < size);i++){ 1092 // sanity checks on data_length: 1093 uint8_t data_length = packet[offset + 8]; 1094 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1095 if ((offset + 9 + data_length + 1) > size) return; 1096 // setup event 1097 uint8_t event_size = 10 + data_length; 1098 int pos = 0; 1099 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1100 event[pos++] = event_size; 1101 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1102 offset += 8; 1103 pos += 8; 1104 event[pos++] = packet[offset + 1 + data_length]; // rssi 1105 event[pos++] = data_length; 1106 offset++; 1107 (void)memcpy(&event[pos], &packet[offset], data_length); 1108 pos += data_length; 1109 offset += data_length + 1; // rssi 1110 hci_emit_event(event, pos, 1); 1111 } 1112 } 1113 #endif 1114 #endif 1115 1116 #ifdef ENABLE_BLE 1117 #ifdef ENABLE_LE_PERIPHERAL 1118 static void hci_reenable_advertisements_if_needed(void){ 1119 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1120 // get number of active le slave connections 1121 int num_slave_connections = 0; 1122 btstack_linked_list_iterator_t it; 1123 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1124 while (btstack_linked_list_iterator_has_next(&it)){ 1125 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1126 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1127 if (con->state != OPEN) continue; 1128 if (con->role != HCI_ROLE_SLAVE) continue; 1129 if (!hci_is_le_connection(con)) continue; 1130 num_slave_connections++; 1131 } 1132 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1133 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1134 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1135 } 1136 } 1137 } 1138 #endif 1139 #endif 1140 1141 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1142 1143 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1144 if (!hci_stack->config) return 0; 1145 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1146 // Limit baud rate for Broadcom chipsets to 3 mbps 1147 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1148 baud_rate = 3000000; 1149 } 1150 return baud_rate; 1151 } 1152 1153 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1154 UNUSED(ds); 1155 1156 switch (hci_stack->substate){ 1157 case HCI_INIT_W4_SEND_RESET: 1158 log_info("Resend HCI Reset"); 1159 hci_stack->substate = HCI_INIT_SEND_RESET; 1160 hci_stack->num_cmd_packets = 1; 1161 hci_run(); 1162 break; 1163 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1164 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1165 if (hci_stack->hci_transport->reset_link){ 1166 hci_stack->hci_transport->reset_link(); 1167 } 1168 1169 /* fall through */ 1170 1171 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1172 log_info("Resend HCI Reset - CSR Warm Boot"); 1173 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1174 hci_stack->num_cmd_packets = 1; 1175 hci_run(); 1176 break; 1177 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1178 if (hci_stack->hci_transport->set_baudrate){ 1179 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1180 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1181 hci_stack->hci_transport->set_baudrate(baud_rate); 1182 } 1183 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1184 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1185 if (hci_stack->hci_transport->reset_link){ 1186 log_info("Link Reset"); 1187 hci_stack->hci_transport->reset_link(); 1188 } 1189 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1190 hci_run(); 1191 } 1192 break; 1193 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1194 // otherwise continue 1195 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1196 hci_send_cmd(&hci_read_local_supported_commands); 1197 break; 1198 default: 1199 break; 1200 } 1201 } 1202 #endif 1203 1204 static void hci_initializing_next_state(void){ 1205 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1206 } 1207 1208 // assumption: hci_can_send_command_packet_now() == true 1209 static void hci_initializing_run(void){ 1210 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1211 switch (hci_stack->substate){ 1212 case HCI_INIT_SEND_RESET: 1213 hci_state_reset(); 1214 1215 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1216 // prepare reset if command complete not received in 100ms 1217 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1218 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1219 btstack_run_loop_add_timer(&hci_stack->timeout); 1220 #endif 1221 // send command 1222 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1223 hci_send_cmd(&hci_reset); 1224 break; 1225 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1226 hci_send_cmd(&hci_read_local_version_information); 1227 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1228 break; 1229 case HCI_INIT_SEND_READ_LOCAL_NAME: 1230 hci_send_cmd(&hci_read_local_name); 1231 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1232 break; 1233 1234 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1235 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1236 hci_state_reset(); 1237 // prepare reset if command complete not received in 100ms 1238 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1239 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1240 btstack_run_loop_add_timer(&hci_stack->timeout); 1241 // send command 1242 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1243 hci_send_cmd(&hci_reset); 1244 break; 1245 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1246 hci_state_reset(); 1247 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1248 hci_send_cmd(&hci_reset); 1249 break; 1250 case HCI_INIT_SEND_BAUD_CHANGE: { 1251 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1252 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1253 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1254 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1255 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1256 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1257 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1258 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1259 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1260 btstack_run_loop_add_timer(&hci_stack->timeout); 1261 } 1262 break; 1263 } 1264 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1265 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1266 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1267 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1268 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1269 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1270 break; 1271 } 1272 case HCI_INIT_CUSTOM_INIT: 1273 // Custom initialization 1274 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1275 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1276 int send_cmd = 0; 1277 switch (hci_stack->chipset_result){ 1278 case BTSTACK_CHIPSET_VALID_COMMAND: 1279 send_cmd = 1; 1280 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1281 break; 1282 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1283 send_cmd = 1; 1284 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1285 log_info("CSR Warm Boot"); 1286 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1287 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1288 btstack_run_loop_add_timer(&hci_stack->timeout); 1289 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1290 && hci_stack->config 1291 && hci_stack->chipset 1292 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1293 && hci_stack->hci_transport->set_baudrate 1294 && hci_transport_uart_get_main_baud_rate()){ 1295 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1296 } else { 1297 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1298 } 1299 break; 1300 default: 1301 break; 1302 } 1303 1304 if (send_cmd){ 1305 int size = 3 + hci_stack->hci_packet_buffer[2]; 1306 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1307 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1308 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1309 break; 1310 } 1311 log_info("Init script done"); 1312 1313 // Init script download on Broadcom chipsets causes: 1314 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1315 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1316 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1317 1318 // - baud rate to reset, restore UART baud rate if needed 1319 int need_baud_change = hci_stack->config 1320 && hci_stack->chipset 1321 && hci_stack->chipset->set_baudrate_command 1322 && hci_stack->hci_transport->set_baudrate 1323 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1324 if (need_baud_change) { 1325 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1326 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1327 hci_stack->hci_transport->set_baudrate(baud_rate); 1328 } 1329 1330 uint16_t bcm_delay_ms = 300; 1331 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1332 // -> Work around: wait here. 1333 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1334 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1335 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1336 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1337 btstack_run_loop_add_timer(&hci_stack->timeout); 1338 break; 1339 } 1340 } 1341 // otherwise continue 1342 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1343 hci_send_cmd(&hci_read_local_supported_commands); 1344 break; 1345 case HCI_INIT_SET_BD_ADDR: 1346 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1347 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1348 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1349 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1350 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1351 break; 1352 #endif 1353 1354 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1355 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1356 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1357 hci_send_cmd(&hci_read_local_supported_commands); 1358 break; 1359 case HCI_INIT_READ_BD_ADDR: 1360 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1361 hci_send_cmd(&hci_read_bd_addr); 1362 break; 1363 case HCI_INIT_READ_BUFFER_SIZE: 1364 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1365 hci_send_cmd(&hci_read_buffer_size); 1366 break; 1367 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1368 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1369 hci_send_cmd(&hci_read_local_supported_features); 1370 break; 1371 1372 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1373 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1374 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1375 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1376 break; 1377 case HCI_INIT_HOST_BUFFER_SIZE: 1378 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1379 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1380 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1381 break; 1382 #endif 1383 1384 case HCI_INIT_SET_EVENT_MASK: 1385 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1386 if (hci_le_supported()){ 1387 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1388 } else { 1389 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1390 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1391 } 1392 break; 1393 1394 #ifdef ENABLE_CLASSIC 1395 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1396 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1397 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1398 break; 1399 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1400 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1401 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1402 break; 1403 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1404 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1405 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1406 break; 1407 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1408 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1409 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1410 break; 1411 case HCI_INIT_WRITE_LOCAL_NAME: { 1412 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1413 hci_reserve_packet_buffer(); 1414 uint8_t * packet = hci_stack->hci_packet_buffer; 1415 // construct HCI Command and send 1416 uint16_t opcode = hci_write_local_name.opcode; 1417 hci_stack->last_cmd_opcode = opcode; 1418 packet[0] = opcode & 0xff; 1419 packet[1] = opcode >> 8; 1420 packet[2] = DEVICE_NAME_LEN; 1421 memset(&packet[3], 0, DEVICE_NAME_LEN); 1422 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1423 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1424 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1425 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1426 // expand '00:00:00:00:00:00' in name with bd_addr 1427 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1428 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1429 break; 1430 } 1431 case HCI_INIT_WRITE_EIR_DATA: { 1432 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1433 hci_reserve_packet_buffer(); 1434 uint8_t * packet = hci_stack->hci_packet_buffer; 1435 // construct HCI Command in-place and send 1436 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1437 hci_stack->last_cmd_opcode = opcode; 1438 uint16_t offset = 0; 1439 packet[offset++] = opcode & 0xff; 1440 packet[offset++] = opcode >> 8; 1441 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1442 packet[offset++] = 0; // FEC not required 1443 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1444 if (hci_stack->eir_data){ 1445 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1446 ad_context_t context; 1447 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1448 uint8_t data_type = ad_iterator_get_data_type(&context); 1449 uint8_t size = ad_iterator_get_data_len(&context); 1450 const uint8_t *data = ad_iterator_get_data(&context); 1451 // copy item 1452 packet[offset++] = size + 1; 1453 packet[offset++] = data_type; 1454 memcpy(&packet[offset], data, size); 1455 // update name item 1456 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1457 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1458 } 1459 offset += size; 1460 } 1461 } else { 1462 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1463 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1464 packet[offset++] = bytes_to_copy + 1; 1465 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1466 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1467 // expand '00:00:00:00:00:00' in name with bd_addr 1468 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1469 } 1470 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1471 break; 1472 } 1473 case HCI_INIT_WRITE_INQUIRY_MODE: 1474 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1475 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1476 break; 1477 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1478 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1479 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1480 break; 1481 case HCI_INIT_WRITE_SCAN_ENABLE: 1482 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1483 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1484 break; 1485 // only sent if ENABLE_SCO_OVER_HCI is defined 1486 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1487 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1488 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1489 break; 1490 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1491 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1492 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1493 break; 1494 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1495 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1496 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1497 log_info("BCM: Route SCO data via HCI transport"); 1498 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1499 break; 1500 1501 #endif 1502 #ifdef ENABLE_BLE 1503 // LE INIT 1504 case HCI_INIT_LE_READ_BUFFER_SIZE: 1505 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1506 hci_send_cmd(&hci_le_read_buffer_size); 1507 break; 1508 case HCI_INIT_LE_SET_EVENT_MASK: 1509 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1510 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1511 break; 1512 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1513 // LE Supported Host = 1, Simultaneous Host = 0 1514 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1515 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1516 break; 1517 #endif 1518 1519 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1520 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1521 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1522 hci_send_cmd(&hci_le_read_maximum_data_length); 1523 break; 1524 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1525 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1526 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1527 break; 1528 #endif 1529 1530 #ifdef ENABLE_LE_CENTRAL 1531 case HCI_INIT_READ_WHITE_LIST_SIZE: 1532 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1533 hci_send_cmd(&hci_le_read_white_list_size); 1534 break; 1535 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1536 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1537 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1538 hci_send_cmd(&hci_le_set_scan_parameters, 1, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, 0); 1539 break; 1540 #endif 1541 default: 1542 return; 1543 } 1544 } 1545 1546 static void hci_init_done(void){ 1547 // done. tell the app 1548 log_info("hci_init_done -> HCI_STATE_WORKING"); 1549 hci_stack->state = HCI_STATE_WORKING; 1550 hci_emit_state(); 1551 hci_run(); 1552 } 1553 1554 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1555 bool command_completed = false; 1556 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1557 uint16_t opcode = little_endian_read_16(packet,3); 1558 if (opcode == hci_stack->last_cmd_opcode){ 1559 command_completed = true; 1560 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1561 } else { 1562 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1563 } 1564 } 1565 1566 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1567 uint8_t status = packet[2]; 1568 uint16_t opcode = little_endian_read_16(packet,4); 1569 if (opcode == hci_stack->last_cmd_opcode){ 1570 if (status){ 1571 command_completed = true; 1572 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1573 } else { 1574 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1575 } 1576 } else { 1577 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1578 } 1579 } 1580 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1581 // Vendor == CSR 1582 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1583 // TODO: track actual command 1584 command_completed = true; 1585 } 1586 1587 // Vendor == Toshiba 1588 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1589 // TODO: track actual command 1590 command_completed = true; 1591 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1592 hci_stack->num_cmd_packets = 1; 1593 } 1594 #endif 1595 1596 return command_completed; 1597 } 1598 1599 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1600 1601 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1602 1603 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1604 1605 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1606 1607 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1608 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1609 // 1610 // HCI Reset 1611 // Timeout 100 ms 1612 // HCI Reset 1613 // Command Complete Reset 1614 // HCI Read Local Version Information 1615 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1616 // hang... 1617 // 1618 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1619 if (!command_completed 1620 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1621 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1622 1623 uint16_t opcode = little_endian_read_16(packet,3); 1624 if (opcode == hci_reset.opcode){ 1625 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1626 return; 1627 } 1628 } 1629 1630 // CSR & H5 1631 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1632 if (!command_completed 1633 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1634 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1635 1636 uint16_t opcode = little_endian_read_16(packet,3); 1637 if (opcode == hci_reset.opcode){ 1638 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1639 return; 1640 } 1641 } 1642 1643 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1644 // fix: Correct substate and behave as command below 1645 if (command_completed){ 1646 switch (hci_stack->substate){ 1647 case HCI_INIT_SEND_RESET: 1648 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1649 break; 1650 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1651 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1652 break; 1653 default: 1654 break; 1655 } 1656 } 1657 1658 #endif 1659 1660 if (!command_completed) return; 1661 1662 bool need_baud_change = false; 1663 bool need_addr_change = false; 1664 1665 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1666 need_baud_change = hci_stack->config 1667 && hci_stack->chipset 1668 && hci_stack->chipset->set_baudrate_command 1669 && hci_stack->hci_transport->set_baudrate 1670 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1671 1672 need_addr_change = hci_stack->custom_bd_addr_set 1673 && hci_stack->chipset 1674 && hci_stack->chipset->set_bd_addr_command; 1675 #endif 1676 1677 switch(hci_stack->substate){ 1678 1679 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1680 case HCI_INIT_SEND_RESET: 1681 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1682 // fix: just correct substate and behave as command below 1683 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1684 btstack_run_loop_remove_timer(&hci_stack->timeout); 1685 break; 1686 case HCI_INIT_W4_SEND_RESET: 1687 btstack_run_loop_remove_timer(&hci_stack->timeout); 1688 break; 1689 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1690 log_info("Received local name, need baud change %d", (int) need_baud_change); 1691 if (need_baud_change){ 1692 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1693 return; 1694 } 1695 // skip baud change 1696 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1697 return; 1698 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1699 // for STLC2500D, baud rate change already happened. 1700 // for others, baud rate gets changed now 1701 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1702 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1703 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1704 hci_stack->hci_transport->set_baudrate(baud_rate); 1705 } 1706 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1707 return; 1708 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1709 btstack_run_loop_remove_timer(&hci_stack->timeout); 1710 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1711 return; 1712 case HCI_INIT_W4_CUSTOM_INIT: 1713 // repeat custom init 1714 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1715 return; 1716 #else 1717 case HCI_INIT_W4_SEND_RESET: 1718 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1719 return ; 1720 #endif 1721 1722 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1723 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1724 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1725 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1726 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1727 return; 1728 } 1729 if (need_addr_change){ 1730 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1731 return; 1732 } 1733 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1734 return; 1735 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1736 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1737 if (need_baud_change){ 1738 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1739 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1740 hci_stack->hci_transport->set_baudrate(baud_rate); 1741 } 1742 if (need_addr_change){ 1743 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1744 return; 1745 } 1746 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1747 return; 1748 case HCI_INIT_W4_SET_BD_ADDR: 1749 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1750 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1751 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1752 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1753 return; 1754 } 1755 // skipping st warm boot 1756 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1757 return; 1758 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1759 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1760 return; 1761 #endif 1762 case HCI_INIT_W4_READ_BD_ADDR: 1763 // only read buffer size if supported 1764 if (hci_stack->local_supported_commands[0] & 0x01) { 1765 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1766 return; 1767 } 1768 // skipping read buffer size 1769 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1770 return; 1771 case HCI_INIT_W4_SET_EVENT_MASK: 1772 // skip Classic init commands for LE only chipsets 1773 if (!hci_classic_supported()){ 1774 #ifdef ENABLE_BLE 1775 if (hci_le_supported()){ 1776 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1777 return; 1778 } 1779 #endif 1780 log_error("Neither BR/EDR nor LE supported"); 1781 hci_init_done(); 1782 return; 1783 } 1784 if (!gap_ssp_supported()){ 1785 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1786 return; 1787 } 1788 break; 1789 #ifdef ENABLE_BLE 1790 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1791 // skip write le host if not supported (e.g. on LE only EM9301) 1792 if (hci_stack->local_supported_commands[0] & 0x02) break; 1793 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1794 return; 1795 1796 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1797 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1798 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1799 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1800 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1801 return; 1802 } 1803 // explicit fall through to reduce repetitions 1804 1805 #ifdef ENABLE_LE_CENTRAL 1806 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1807 #else 1808 hci_init_done(); 1809 #endif 1810 return; 1811 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1812 1813 #endif /* ENABLE_BLE */ 1814 1815 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1816 // skip write secure connections host support if not supported or disabled 1817 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1] & 0x02) == 0) { 1818 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1819 return; 1820 } 1821 break; 1822 1823 #ifdef ENABLE_SCO_OVER_HCI 1824 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1825 // skip write synchronous flow control if not supported 1826 if (hci_stack->local_supported_commands[0] & 0x04) break; 1827 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1828 1829 /* fall through */ 1830 1831 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1832 // skip write default erroneous data reporting if not supported 1833 if (hci_stack->local_supported_commands[0] & 0x08) break; 1834 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1835 1836 /* fall through */ 1837 1838 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1839 // skip bcm set sco pcm config on non-Broadcom chipsets 1840 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1841 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1842 1843 /* fall through */ 1844 1845 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1846 if (!hci_le_supported()){ 1847 // SKIP LE init for Classic only configuration 1848 hci_init_done(); 1849 return; 1850 } 1851 break; 1852 1853 #else /* !ENABLE_SCO_OVER_HCI */ 1854 1855 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1856 #ifdef ENABLE_BLE 1857 if (hci_le_supported()){ 1858 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1859 return; 1860 } 1861 #endif 1862 // SKIP LE init for Classic only configuration 1863 hci_init_done(); 1864 return; 1865 #endif /* ENABLE_SCO_OVER_HCI */ 1866 1867 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1868 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1869 // Response to command before init done state -> init done 1870 case (HCI_INIT_DONE-1): 1871 hci_init_done(); 1872 return; 1873 #endif 1874 1875 default: 1876 break; 1877 } 1878 hci_initializing_next_state(); 1879 } 1880 1881 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1882 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1883 bd_addr_t bd_address; 1884 (void)memcpy(&bd_address, conn->address, 6); 1885 1886 #ifdef ENABLE_CLASSIC 1887 // cache needed data 1888 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1889 #endif 1890 1891 // connection failed, remove entry 1892 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1893 btstack_memory_hci_connection_free( conn ); 1894 1895 #ifdef ENABLE_CLASSIC 1896 // notify client if dedicated bonding 1897 if (notify_dedicated_bonding_failed){ 1898 log_info("hci notify_dedicated_bonding_failed"); 1899 hci_emit_dedicated_bonding_result(bd_address, status); 1900 } 1901 1902 // if authentication error, also delete link key 1903 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1904 gap_drop_link_key_for_bd_addr(bd_address); 1905 } 1906 #endif 1907 } 1908 1909 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1910 // SSP Controller 1911 if (features[6] & (1 << 3)){ 1912 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1913 } 1914 // eSCO 1915 if (features[3] & (1<<7)){ 1916 conn->remote_supported_features[0] |= 1; 1917 } 1918 // Extended features 1919 if (features[7] & (1<<7)){ 1920 conn->remote_supported_features[0] |= 2; 1921 } 1922 } 1923 1924 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1925 // SSP Host 1926 if (features[0] & (1 << 0)){ 1927 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1928 } 1929 // SC Host 1930 if (features[0] & (1 << 3)){ 1931 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 1932 } 1933 } 1934 1935 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 1936 // SC Controller 1937 if (features[1] & (1 << 0)){ 1938 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 1939 } 1940 } 1941 1942 static void hci_handle_remote_features_received(hci_connection_t * conn){ 1943 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1944 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 1945 if (conn->bonding_flags & BONDING_DEDICATED){ 1946 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1947 } 1948 } 1949 1950 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1951 // handle BT initialization 1952 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1953 hci_initializing_event_handler(packet, size); 1954 } 1955 1956 // help with BT sleep 1957 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1958 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1959 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1960 hci_initializing_next_state(); 1961 } 1962 } 1963 1964 static void event_handler(uint8_t *packet, int size){ 1965 1966 uint16_t event_length = packet[1]; 1967 1968 // assert packet is complete 1969 if (size != (event_length + 2)){ 1970 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1971 return; 1972 } 1973 1974 bd_addr_t addr; 1975 bd_addr_type_t addr_type; 1976 hci_con_handle_t handle; 1977 hci_connection_t * conn; 1978 int i; 1979 int create_connection_cmd; 1980 1981 #ifdef ENABLE_CLASSIC 1982 uint8_t link_type; 1983 #endif 1984 1985 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1986 1987 switch (hci_event_packet_get_type(packet)) { 1988 1989 case HCI_EVENT_COMMAND_COMPLETE: 1990 // get num cmd packets - limit to 1 to reduce complexity 1991 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1992 1993 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1994 if (packet[5]) break; 1995 // terminate, name 248 chars 1996 packet[6+248] = 0; 1997 log_info("local name: %s", &packet[6]); 1998 } 1999 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 2000 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2001 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2002 uint16_t acl_len = little_endian_read_16(packet, 6); 2003 uint16_t sco_len = packet[8]; 2004 2005 // determine usable ACL/SCO payload size 2006 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2007 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2008 2009 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2010 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2011 2012 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2013 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2014 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2015 } 2016 } 2017 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_rssi)){ 2018 if (packet[5] == 0){ 2019 uint8_t event[5]; 2020 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2021 event[1] = 3; 2022 (void)memcpy(&event[2], &packet[6], 3); 2023 hci_emit_event(event, sizeof(event), 1); 2024 } 2025 } 2026 #ifdef ENABLE_BLE 2027 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 2028 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2029 hci_stack->le_acl_packets_total_num = packet[8]; 2030 // determine usable ACL payload size 2031 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2032 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2033 } 2034 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2035 } 2036 #endif 2037 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2038 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 2039 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2040 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2041 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); 2042 } 2043 #endif 2044 #ifdef ENABLE_LE_CENTRAL 2045 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 2046 hci_stack->le_whitelist_capacity = packet[6]; 2047 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2048 } 2049 #endif 2050 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 2051 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 2052 hci_stack->local_bd_addr); 2053 log_info("Local Address, Status: 0x%02x: Addr: %s", 2054 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 2055 #ifdef ENABLE_CLASSIC 2056 if (hci_stack->link_key_db){ 2057 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2058 } 2059 #endif 2060 } 2061 #ifdef ENABLE_CLASSIC 2062 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2063 hci_emit_discoverable_enabled(hci_stack->discoverable); 2064 } 2065 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 2066 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2067 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2068 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2069 hci_emit_event(event, sizeof(event), 1); 2070 } 2071 } 2072 #endif 2073 2074 // Note: HCI init checks 2075 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 2076 (void)memcpy(hci_stack->local_supported_features, 2077 &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 2078 8); 2079 2080 #ifdef ENABLE_CLASSIC 2081 // determine usable ACL packet types based on host buffer size and supported features 2082 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2083 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2084 #endif 2085 // Classic/LE 2086 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2087 } 2088 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 2089 // hci_stack->hci_version = little_endian_read_16(packet, 4); 2090 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 2091 uint16_t manufacturer = little_endian_read_16(packet, 10); 2092 // map Cypress to Broadcom 2093 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2094 log_info("Treat Cypress as Broadcom"); 2095 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2096 little_endian_store_16(packet, 10, manufacturer); 2097 } 2098 hci_stack->manufacturer = manufacturer; 2099 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 2100 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 2101 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2102 } 2103 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 2104 hci_stack->local_supported_commands[0] = 2105 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2106 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2107 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2108 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2109 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2110 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2111 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2112 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+20] & 0x10) << 3); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2113 hci_stack->local_supported_commands[1] = 2114 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+ 2] & 0x40) >> 6) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2115 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+32] & 0x08) >> 2); // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2116 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2117 } 2118 #ifdef ENABLE_CLASSIC 2119 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 2120 if (packet[5] == 0){ 2121 hci_stack->synchronous_flow_control_enabled = 1; 2122 } 2123 } 2124 else if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_encryption_key_size)){ 2125 uint8_t status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2126 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2127 conn = hci_connection_for_handle(handle); 2128 if (!conn) break; 2129 if (status == 0){ 2130 uint8_t key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2131 log_info("Handle %x04x key Size: %u", handle, key_size); 2132 conn->encryption_key_size = key_size; 2133 } else { 2134 log_info("Read Encryption Key Size failed -> assuming insecure connection with key size of 1"); 2135 conn->encryption_key_size = 1; 2136 } 2137 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2138 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2139 } 2140 #endif 2141 break; 2142 2143 case HCI_EVENT_COMMAND_STATUS: 2144 // get num cmd packets - limit to 1 to reduce complexity 2145 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2146 2147 // check command status to detected failed outgoing connections 2148 create_connection_cmd = 0; 2149 #ifdef ENABLE_CLASSIC 2150 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2151 create_connection_cmd = 1; 2152 } 2153 #endif 2154 #ifdef ENABLE_LE_CENTRAL 2155 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2156 create_connection_cmd = 1; 2157 } 2158 #endif 2159 if (create_connection_cmd) { 2160 uint8_t status = hci_event_command_status_get_status(packet); 2161 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2162 log_info("command status (create connection), status %x, connection %p, addr %s, type %x", status, conn, bd_addr_to_str(hci_stack->outgoing_addr), hci_stack->outgoing_addr_type); 2163 2164 // reset outgoing address info 2165 memset(hci_stack->outgoing_addr, 0, 6); 2166 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2167 2168 // error => outgoing connection failed 2169 if ((conn != NULL) && (status != 0)){ 2170 hci_handle_connection_failed(conn, status); 2171 } 2172 } 2173 break; 2174 2175 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2176 if (size < 3) return; 2177 uint16_t num_handles = packet[2]; 2178 if (size != (3 + num_handles * 4)) return; 2179 uint16_t offset = 3; 2180 for (i=0; i<num_handles;i++){ 2181 handle = little_endian_read_16(packet, offset) & 0x0fff; 2182 offset += 2; 2183 uint16_t num_packets = little_endian_read_16(packet, offset); 2184 offset += 2; 2185 2186 conn = hci_connection_for_handle(handle); 2187 if (!conn){ 2188 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2189 continue; 2190 } 2191 2192 if (conn->num_packets_sent >= num_packets){ 2193 conn->num_packets_sent -= num_packets; 2194 } else { 2195 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2196 conn->num_packets_sent = 0; 2197 } 2198 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2199 2200 #ifdef ENABLE_CLASSIC 2201 // For SCO, we do the can_send_now_check here 2202 hci_notify_if_sco_can_send_now(); 2203 #endif 2204 } 2205 break; 2206 } 2207 2208 #ifdef ENABLE_CLASSIC 2209 case HCI_EVENT_INQUIRY_COMPLETE: 2210 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2211 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2212 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2213 hci_emit_event(event, sizeof(event), 1); 2214 } 2215 break; 2216 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2217 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2218 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2219 } 2220 break; 2221 case HCI_EVENT_CONNECTION_REQUEST: 2222 reverse_bd_addr(&packet[2], addr); 2223 if (hci_stack->gap_classic_accept_callback != NULL){ 2224 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2225 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2226 bd_addr_copy(hci_stack->decline_addr, addr); 2227 break; 2228 } 2229 } 2230 2231 // TODO: eval COD 8-10 2232 link_type = packet[11]; 2233 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2234 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2235 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2236 if (!conn) { 2237 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2238 } 2239 if (!conn) { 2240 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2241 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2242 bd_addr_copy(hci_stack->decline_addr, addr); 2243 break; 2244 } 2245 conn->role = HCI_ROLE_SLAVE; 2246 conn->state = RECEIVED_CONNECTION_REQUEST; 2247 // store info about eSCO 2248 if (link_type == 0x02){ 2249 conn->remote_supported_features[0] |= 1; 2250 } 2251 hci_run(); 2252 break; 2253 2254 case HCI_EVENT_CONNECTION_COMPLETE: 2255 // Connection management 2256 reverse_bd_addr(&packet[5], addr); 2257 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2258 addr_type = BD_ADDR_TYPE_ACL; 2259 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2260 if (conn) { 2261 if (!packet[2]){ 2262 conn->state = OPEN; 2263 conn->con_handle = little_endian_read_16(packet, 3); 2264 2265 // queue get remote feature 2266 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2267 2268 // queue set supervision timeout if we're master 2269 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2270 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2271 } 2272 2273 // restart timer 2274 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2275 btstack_run_loop_add_timer(&conn->timeout); 2276 2277 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2278 2279 hci_emit_nr_connections_changed(); 2280 } else { 2281 // connection failed 2282 hci_handle_connection_failed(conn, packet[2]); 2283 } 2284 } 2285 break; 2286 2287 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2288 reverse_bd_addr(&packet[5], addr); 2289 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2290 if (packet[2]){ 2291 // connection failed 2292 break; 2293 } 2294 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2295 if (!conn) { 2296 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2297 } 2298 if (!conn) { 2299 break; 2300 } 2301 conn->state = OPEN; 2302 conn->con_handle = little_endian_read_16(packet, 3); 2303 2304 #ifdef ENABLE_SCO_OVER_HCI 2305 // update SCO 2306 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2307 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2308 } 2309 // trigger can send now 2310 if (hci_have_usb_transport()){ 2311 hci_stack->sco_can_send_now = 1; 2312 } 2313 #endif 2314 break; 2315 2316 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2317 handle = little_endian_read_16(packet, 3); 2318 conn = hci_connection_for_handle(handle); 2319 if (!conn) break; 2320 if (!packet[2]){ 2321 const uint8_t * features = &packet[5]; 2322 hci_handle_remote_features_page_0(conn, features); 2323 2324 // read extended features if possible 2325 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2326 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2327 break; 2328 } 2329 } 2330 hci_handle_remote_features_received(conn); 2331 break; 2332 2333 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2334 handle = little_endian_read_16(packet, 3); 2335 conn = hci_connection_for_handle(handle); 2336 if (!conn) break; 2337 // status = ok, page = 1 2338 if (!packet[2]) { 2339 uint8_t page_number = packet[5]; 2340 uint8_t maximum_page_number = packet[6]; 2341 const uint8_t * features = &packet[7]; 2342 bool done = false; 2343 switch (page_number){ 2344 case 1: 2345 hci_handle_remote_features_page_1(conn, features); 2346 if (maximum_page_number >= 2){ 2347 // get Secure Connections (Controller) from Page 2 if available 2348 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2349 } else { 2350 // otherwise, assume SC (Controller) == SC (Host) 2351 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2352 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2353 } 2354 done = true; 2355 } 2356 break; 2357 case 2: 2358 hci_handle_remote_features_page_2(conn, features); 2359 done = true; 2360 break; 2361 default: 2362 break; 2363 } 2364 if (!done) break; 2365 } 2366 hci_handle_remote_features_received(conn); 2367 break; 2368 2369 case HCI_EVENT_LINK_KEY_REQUEST: 2370 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2371 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2372 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2373 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2374 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2375 hci_run(); 2376 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2377 return; 2378 2379 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2380 reverse_bd_addr(&packet[2], addr); 2381 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2382 if (!conn) break; 2383 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2384 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2385 // Change Connection Encryption keeps link key type 2386 if (link_key_type != CHANGED_COMBINATION_KEY){ 2387 conn->link_key_type = link_key_type; 2388 } 2389 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2390 // still forward event to allow dismiss of pairing dialog 2391 break; 2392 } 2393 2394 case HCI_EVENT_PIN_CODE_REQUEST: 2395 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2396 // non-bondable mode: pin code negative reply will be sent 2397 if (!hci_stack->bondable){ 2398 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2399 hci_run(); 2400 return; 2401 } 2402 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2403 if (!hci_stack->link_key_db) break; 2404 hci_event_pin_code_request_get_bd_addr(packet, addr); 2405 hci_stack->link_key_db->delete_link_key(addr); 2406 break; 2407 2408 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2409 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2410 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2411 break; 2412 2413 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2414 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2415 if (!hci_stack->ssp_auto_accept) break; 2416 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2417 break; 2418 2419 case HCI_EVENT_USER_PASSKEY_REQUEST: 2420 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2421 if (!hci_stack->ssp_auto_accept) break; 2422 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2423 break; 2424 case HCI_EVENT_MODE_CHANGE: 2425 handle = hci_event_mode_change_get_handle(packet); 2426 conn = hci_connection_for_handle(handle); 2427 if (!conn) break; 2428 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2429 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2430 break; 2431 #endif 2432 2433 case HCI_EVENT_ENCRYPTION_CHANGE: 2434 handle = hci_event_encryption_change_get_connection_handle(packet); 2435 conn = hci_connection_for_handle(handle); 2436 if (!conn) break; 2437 if (hci_event_encryption_change_get_status(packet) == 0) { 2438 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2439 if (encryption_enabled){ 2440 if (hci_is_le_connection(conn)){ 2441 // For LE, we accept connection as encrypted 2442 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2443 } 2444 #ifdef ENABLE_CLASSIC 2445 else { 2446 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2447 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2448 bool connected_uses_aes_ccm = encryption_enabled == 2; 2449 if (sc_used_during_pairing && !connected_uses_aes_ccm){ 2450 log_info("SC during pairing, but only E0 now -> abort"); 2451 conn->state = conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2452 break; 2453 } 2454 2455 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2456 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2457 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2458 } else { 2459 // if not, pretend everything is perfect 2460 conn->encryption_key_size = 16; 2461 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2462 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2463 } 2464 } 2465 #endif 2466 } else { 2467 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2468 } 2469 } 2470 2471 break; 2472 2473 #ifdef ENABLE_CLASSIC 2474 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2475 handle = little_endian_read_16(packet, 3); 2476 conn = hci_connection_for_handle(handle); 2477 if (!conn) break; 2478 2479 // dedicated bonding: send result and disconnect 2480 if (conn->bonding_flags & BONDING_DEDICATED){ 2481 conn->bonding_flags &= ~BONDING_DEDICATED; 2482 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2483 conn->bonding_status = packet[2]; 2484 break; 2485 } 2486 2487 if ((packet[2] == 0) && (gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)){ 2488 // link key sufficient for requested security 2489 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2490 break; 2491 } 2492 // not enough 2493 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2494 break; 2495 #endif 2496 2497 // HCI_EVENT_DISCONNECTION_COMPLETE 2498 // has been split, to first notify stack before shutting connection down 2499 // see end of function, too. 2500 case HCI_EVENT_DISCONNECTION_COMPLETE: 2501 if (packet[2]) break; // status != 0 2502 handle = little_endian_read_16(packet, 3); 2503 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2504 if (hci_stack->acl_fragmentation_total_size > 0) { 2505 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2506 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2507 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2508 hci_stack->acl_fragmentation_total_size = 0; 2509 hci_stack->acl_fragmentation_pos = 0; 2510 if (release_buffer){ 2511 hci_release_packet_buffer(); 2512 } 2513 } 2514 } 2515 2516 conn = hci_connection_for_handle(handle); 2517 if (!conn) break; 2518 // mark connection for shutdown 2519 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2520 2521 // emit dedicatd bonding event 2522 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2523 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2524 } 2525 2526 #ifdef ENABLE_BLE 2527 #ifdef ENABLE_LE_PERIPHERAL 2528 // re-enable advertisements for le connections if active 2529 if (hci_is_le_connection(conn)){ 2530 hci_reenable_advertisements_if_needed(); 2531 } 2532 #endif 2533 #endif 2534 break; 2535 2536 case HCI_EVENT_HARDWARE_ERROR: 2537 log_error("Hardware Error: 0x%02x", packet[2]); 2538 if (hci_stack->hardware_error_callback){ 2539 (*hci_stack->hardware_error_callback)(packet[2]); 2540 } else { 2541 // if no special requests, just reboot stack 2542 hci_power_control_off(); 2543 hci_power_control_on(); 2544 } 2545 break; 2546 2547 #ifdef ENABLE_CLASSIC 2548 case HCI_EVENT_ROLE_CHANGE: 2549 if (packet[2]) break; // status != 0 2550 reverse_bd_addr(&packet[3], addr); 2551 addr_type = BD_ADDR_TYPE_ACL; 2552 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2553 if (!conn) break; 2554 conn->role = packet[9]; 2555 break; 2556 #endif 2557 2558 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2559 // release packet buffer only for asynchronous transport and if there are not further fragements 2560 if (hci_transport_synchronous()) { 2561 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2562 return; // instead of break: to avoid re-entering hci_run() 2563 } 2564 hci_stack->acl_fragmentation_tx_active = 0; 2565 if (hci_stack->acl_fragmentation_total_size) break; 2566 hci_release_packet_buffer(); 2567 2568 // L2CAP receives this event via the hci_emit_event below 2569 2570 #ifdef ENABLE_CLASSIC 2571 // For SCO, we do the can_send_now_check here 2572 hci_notify_if_sco_can_send_now(); 2573 #endif 2574 break; 2575 2576 #ifdef ENABLE_CLASSIC 2577 case HCI_EVENT_SCO_CAN_SEND_NOW: 2578 // For SCO, we do the can_send_now_check here 2579 hci_stack->sco_can_send_now = 1; 2580 hci_notify_if_sco_can_send_now(); 2581 return; 2582 2583 // explode inquriy results for easier consumption 2584 case HCI_EVENT_INQUIRY_RESULT: 2585 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2586 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2587 gap_inquiry_explode(packet, size); 2588 break; 2589 #endif 2590 2591 #ifdef ENABLE_BLE 2592 case HCI_EVENT_LE_META: 2593 switch (packet[2]){ 2594 #ifdef ENABLE_LE_CENTRAL 2595 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2596 // log_info("advertising report received"); 2597 if (!hci_stack->le_scanning_enabled) break; 2598 le_handle_advertisement_report(packet, size); 2599 break; 2600 #endif 2601 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2602 // Connection management 2603 reverse_bd_addr(&packet[8], addr); 2604 addr_type = (bd_addr_type_t)packet[7]; 2605 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2606 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2607 2608 #ifdef ENABLE_LE_CENTRAL 2609 // if auto-connect, remove from whitelist in both roles 2610 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2611 hci_remove_from_whitelist(addr_type, addr); 2612 } 2613 // handle error: error is reported only to the initiator -> outgoing connection 2614 if (packet[3]){ 2615 2616 // handle cancelled outgoing connection 2617 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2618 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2619 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2620 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2621 conn = gap_get_outgoing_connection(); 2622 } 2623 2624 // outgoing connection establishment is done 2625 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2626 // remove entry 2627 if (conn){ 2628 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2629 btstack_memory_hci_connection_free( conn ); 2630 } 2631 break; 2632 } 2633 #endif 2634 // on success, both hosts receive connection complete event 2635 if (packet[6] == HCI_ROLE_MASTER){ 2636 #ifdef ENABLE_LE_CENTRAL 2637 // if we're master, it was an outgoing connection and we're done with it 2638 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2639 #endif 2640 } else { 2641 #ifdef ENABLE_LE_PERIPHERAL 2642 // if we're slave, it was an incoming connection, advertisements have stopped 2643 hci_stack->le_advertisements_active = 0; 2644 #endif 2645 } 2646 // LE connections are auto-accepted, so just create a connection if there isn't one already 2647 if (!conn){ 2648 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2649 } 2650 // no memory, sorry. 2651 if (!conn){ 2652 break; 2653 } 2654 2655 conn->state = OPEN; 2656 conn->role = packet[6]; 2657 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2658 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2659 2660 #ifdef ENABLE_LE_PERIPHERAL 2661 if (packet[6] == HCI_ROLE_SLAVE){ 2662 hci_reenable_advertisements_if_needed(); 2663 } 2664 #endif 2665 2666 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2667 2668 // restart timer 2669 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2670 // btstack_run_loop_add_timer(&conn->timeout); 2671 2672 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2673 2674 hci_emit_nr_connections_changed(); 2675 break; 2676 2677 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2678 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2679 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2680 conn = hci_connection_for_handle(handle); 2681 if (!conn) break; 2682 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2683 break; 2684 2685 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2686 // connection 2687 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2688 conn = hci_connection_for_handle(handle); 2689 if (conn) { 2690 // read arguments 2691 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2692 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2693 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2694 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2695 2696 // validate against current connection parameter range 2697 le_connection_parameter_range_t existing_range; 2698 gap_get_connection_parameter_range(&existing_range); 2699 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2700 if (update_parameter){ 2701 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2702 conn->le_conn_interval_min = le_conn_interval_min; 2703 conn->le_conn_interval_max = le_conn_interval_max; 2704 conn->le_conn_latency = le_conn_latency; 2705 conn->le_supervision_timeout = le_supervision_timeout; 2706 } else { 2707 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2708 } 2709 } 2710 break; 2711 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2712 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2713 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2714 conn = hci_connection_for_handle(handle); 2715 if (conn) { 2716 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2717 } 2718 break; 2719 #endif 2720 default: 2721 break; 2722 } 2723 break; 2724 #endif 2725 case HCI_EVENT_VENDOR_SPECIFIC: 2726 // Vendor specific commands often create vendor specific event instead of num completed packets 2727 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2728 switch (hci_stack->manufacturer){ 2729 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2730 hci_stack->num_cmd_packets = 1; 2731 break; 2732 default: 2733 break; 2734 } 2735 break; 2736 default: 2737 break; 2738 } 2739 2740 handle_event_for_current_stack_state(packet, size); 2741 2742 // notify upper stack 2743 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2744 2745 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2746 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2747 if (!packet[2]){ 2748 handle = little_endian_read_16(packet, 3); 2749 hci_connection_t * aConn = hci_connection_for_handle(handle); 2750 if (aConn) { 2751 // discard connection if app did not trigger a reconnect in the event handler 2752 if (aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2753 hci_shutdown_connection(aConn); 2754 } 2755 } 2756 } 2757 } 2758 2759 // execute main loop 2760 hci_run(); 2761 } 2762 2763 #ifdef ENABLE_CLASSIC 2764 2765 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2766 static void sco_schedule_tx(hci_connection_t * conn); 2767 2768 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2769 log_debug("SCO TX Timeout"); 2770 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2771 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2772 if (!conn) return; 2773 2774 // trigger send 2775 conn->sco_tx_ready = 1; 2776 // extra packet if CVSD but SCO buffer is too short 2777 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2778 conn->sco_tx_ready++; 2779 } 2780 hci_notify_if_sco_can_send_now(); 2781 } 2782 2783 2784 #define SCO_TX_AFTER_RX_MS (6) 2785 2786 static void sco_schedule_tx(hci_connection_t * conn){ 2787 2788 uint32_t now = btstack_run_loop_get_time_ms(); 2789 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2790 int time_delta_ms = sco_tx_ms - now; 2791 2792 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2793 2794 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2795 btstack_run_loop_set_timer(timer, time_delta_ms); 2796 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2797 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2798 btstack_run_loop_add_timer(timer); 2799 } 2800 2801 static void sco_handler(uint8_t * packet, uint16_t size){ 2802 // lookup connection struct 2803 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2804 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2805 if (!conn) return; 2806 2807 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2808 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2809 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2810 packet[2] = 0x3c; 2811 memmove(&packet[3], &packet[23], 63); 2812 size = 63; 2813 } 2814 } 2815 2816 if (hci_have_usb_transport()){ 2817 // Nothing to do 2818 } else { 2819 // 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); 2820 if (hci_stack->synchronous_flow_control_enabled == 0){ 2821 uint32_t now = btstack_run_loop_get_time_ms(); 2822 2823 if (!conn->sco_rx_valid){ 2824 // ignore first 10 packets 2825 conn->sco_rx_count++; 2826 // log_debug("sco rx count %u", conn->sco_rx_count); 2827 if (conn->sco_rx_count == 10) { 2828 // use first timestamp as is and pretent it just started 2829 conn->sco_rx_ms = now; 2830 conn->sco_rx_valid = 1; 2831 conn->sco_rx_count = 0; 2832 sco_schedule_tx(conn); 2833 } 2834 } else { 2835 // track expected arrival timme 2836 conn->sco_rx_count++; 2837 conn->sco_rx_ms += 7; 2838 int delta = (int32_t) (now - conn->sco_rx_ms); 2839 if (delta > 0){ 2840 conn->sco_rx_ms++; 2841 } 2842 // log_debug("sco rx %u", conn->sco_rx_ms); 2843 sco_schedule_tx(conn); 2844 } 2845 } 2846 } 2847 // deliver to app 2848 if (hci_stack->sco_packet_handler) { 2849 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2850 } 2851 2852 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2853 conn->num_packets_completed++; 2854 hci_stack->host_completed_packets = 1; 2855 hci_run(); 2856 #endif 2857 } 2858 #endif 2859 2860 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2861 hci_dump_packet(packet_type, 1, packet, size); 2862 switch (packet_type) { 2863 case HCI_EVENT_PACKET: 2864 event_handler(packet, size); 2865 break; 2866 case HCI_ACL_DATA_PACKET: 2867 acl_handler(packet, size); 2868 break; 2869 #ifdef ENABLE_CLASSIC 2870 case HCI_SCO_DATA_PACKET: 2871 sco_handler(packet, size); 2872 break; 2873 #endif 2874 default: 2875 break; 2876 } 2877 } 2878 2879 /** 2880 * @brief Add event packet handler. 2881 */ 2882 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2883 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2884 } 2885 2886 2887 /** Register HCI packet handlers */ 2888 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2889 hci_stack->acl_packet_handler = handler; 2890 } 2891 2892 #ifdef ENABLE_CLASSIC 2893 /** 2894 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2895 */ 2896 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2897 hci_stack->sco_packet_handler = handler; 2898 } 2899 #endif 2900 2901 static void hci_state_reset(void){ 2902 // no connections yet 2903 hci_stack->connections = NULL; 2904 2905 // keep discoverable/connectable as this has been requested by the client(s) 2906 // hci_stack->discoverable = 0; 2907 // hci_stack->connectable = 0; 2908 // hci_stack->bondable = 1; 2909 // hci_stack->own_addr_type = 0; 2910 2911 // buffer is free 2912 hci_stack->hci_packet_buffer_reserved = 0; 2913 2914 // no pending cmds 2915 hci_stack->decline_reason = 0; 2916 hci_stack->new_scan_enable_value = 0xff; 2917 2918 // LE 2919 #ifdef ENABLE_BLE 2920 memset(hci_stack->le_random_address, 0, 6); 2921 hci_stack->le_random_address_set = 0; 2922 #endif 2923 #ifdef ENABLE_LE_CENTRAL 2924 hci_stack->le_scanning_active = 0; 2925 hci_stack->le_scan_type = 0xff; 2926 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2927 hci_stack->le_whitelist = 0; 2928 hci_stack->le_whitelist_capacity = 0; 2929 #endif 2930 } 2931 2932 #ifdef ENABLE_CLASSIC 2933 /** 2934 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2935 */ 2936 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2937 // store and open remote device db 2938 hci_stack->link_key_db = link_key_db; 2939 if (hci_stack->link_key_db) { 2940 hci_stack->link_key_db->open(); 2941 } 2942 } 2943 #endif 2944 2945 void hci_init(const hci_transport_t *transport, const void *config){ 2946 2947 #ifdef HAVE_MALLOC 2948 if (!hci_stack) { 2949 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2950 } 2951 #else 2952 hci_stack = &hci_stack_static; 2953 #endif 2954 memset(hci_stack, 0, sizeof(hci_stack_t)); 2955 2956 // reference to use transport layer implementation 2957 hci_stack->hci_transport = transport; 2958 2959 // reference to used config 2960 hci_stack->config = config; 2961 2962 // setup pointer for outgoing packet buffer 2963 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2964 2965 // max acl payload size defined in config.h 2966 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2967 2968 // register packet handlers with transport 2969 transport->register_packet_handler(&packet_handler); 2970 2971 hci_stack->state = HCI_STATE_OFF; 2972 2973 // class of device 2974 hci_stack->class_of_device = 0x007a020c; // Smartphone 2975 2976 // bondable by default 2977 hci_stack->bondable = 1; 2978 2979 #ifdef ENABLE_CLASSIC 2980 // classic name 2981 hci_stack->local_name = default_classic_name; 2982 2983 // Master slave policy 2984 hci_stack->master_slave_policy = 1; 2985 2986 // Allow Role Switch 2987 hci_stack->allow_role_switch = 1; 2988 2989 // Default / minimum security level = 2 2990 hci_stack->gap_security_level = LEVEL_2; 2991 2992 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3, we use 16 as default 2993 hci_stack->gap_required_encyrption_key_size = 16; 2994 #endif 2995 2996 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2997 hci_stack->ssp_enable = 1; 2998 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2999 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3000 hci_stack->ssp_auto_accept = 1; 3001 3002 // Secure Connections: enable (requires support from Controller) 3003 hci_stack->secure_connections_enable = true; 3004 3005 // voice setting - signed 16 bit pcm data with CVSD over the air 3006 hci_stack->sco_voice_setting = 0x60; 3007 3008 #ifdef ENABLE_LE_CENTRAL 3009 // connection parameter to use for outgoing connections 3010 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3011 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3012 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3013 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3014 hci_stack->le_connection_latency = 4; // 4 3015 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3016 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3017 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3018 3019 // default LE Scanning 3020 hci_stack->le_scan_interval = 0x1e0; 3021 hci_stack->le_scan_window = 0x30; 3022 #endif 3023 3024 #ifdef ENABLE_LE_PERIPHERAL 3025 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3026 #endif 3027 3028 // connection parameter range used to answer connection parameter update requests in l2cap 3029 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3030 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3031 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3032 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3033 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3034 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3035 3036 hci_state_reset(); 3037 } 3038 3039 /** 3040 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3041 */ 3042 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3043 hci_stack->chipset = chipset_driver; 3044 3045 // reset chipset driver - init is also called on power_up 3046 if (hci_stack->chipset && hci_stack->chipset->init){ 3047 hci_stack->chipset->init(hci_stack->config); 3048 } 3049 } 3050 3051 /** 3052 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3053 */ 3054 void hci_set_control(const btstack_control_t *hardware_control){ 3055 // references to used control implementation 3056 hci_stack->control = hardware_control; 3057 // init with transport config 3058 hardware_control->init(hci_stack->config); 3059 } 3060 3061 void hci_close(void){ 3062 // close remote device db 3063 if (hci_stack->link_key_db) { 3064 hci_stack->link_key_db->close(); 3065 } 3066 3067 btstack_linked_list_iterator_t lit; 3068 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3069 while (btstack_linked_list_iterator_has_next(&lit)){ 3070 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3071 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3072 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3073 hci_shutdown_connection(connection); 3074 } 3075 3076 hci_power_control(HCI_POWER_OFF); 3077 3078 #ifdef HAVE_MALLOC 3079 free(hci_stack); 3080 #endif 3081 hci_stack = NULL; 3082 } 3083 3084 #ifdef ENABLE_CLASSIC 3085 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3086 // validate ranage and set 3087 if (encryption_key_size < 7) return; 3088 if (encryption_key_size > 16) return; 3089 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3090 } 3091 3092 void gap_set_security_level(gap_security_level_t security_level){ 3093 hci_stack->gap_security_level = security_level; 3094 } 3095 3096 gap_security_level_t gap_get_security_level(void){ 3097 return hci_stack->gap_security_level; 3098 } 3099 #endif 3100 3101 #ifdef ENABLE_CLASSIC 3102 void gap_set_class_of_device(uint32_t class_of_device){ 3103 hci_stack->class_of_device = class_of_device; 3104 } 3105 3106 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3107 hci_stack->default_link_policy_settings = default_link_policy_settings; 3108 } 3109 3110 void gap_set_allow_role_switch(bool allow_role_switch){ 3111 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3112 } 3113 3114 uint8_t hci_get_allow_role_switch(void){ 3115 return hci_stack->allow_role_switch; 3116 } 3117 3118 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3119 hci_stack->link_supervision_timeout = link_supervision_timeout; 3120 } 3121 3122 void hci_disable_l2cap_timeout_check(void){ 3123 disable_l2cap_timeouts = 1; 3124 } 3125 #endif 3126 3127 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3128 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3129 void hci_set_bd_addr(bd_addr_t addr){ 3130 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3131 hci_stack->custom_bd_addr_set = 1; 3132 } 3133 #endif 3134 3135 // State-Module-Driver overview 3136 // state module low-level 3137 // HCI_STATE_OFF off close 3138 // HCI_STATE_INITIALIZING, on open 3139 // HCI_STATE_WORKING, on open 3140 // HCI_STATE_HALTING, on open 3141 // HCI_STATE_SLEEPING, off/sleep close 3142 // HCI_STATE_FALLING_ASLEEP on open 3143 3144 static int hci_power_control_on(void){ 3145 3146 // power on 3147 int err = 0; 3148 if (hci_stack->control && hci_stack->control->on){ 3149 err = (*hci_stack->control->on)(); 3150 } 3151 if (err){ 3152 log_error( "POWER_ON failed"); 3153 hci_emit_hci_open_failed(); 3154 return err; 3155 } 3156 3157 // int chipset driver 3158 if (hci_stack->chipset && hci_stack->chipset->init){ 3159 hci_stack->chipset->init(hci_stack->config); 3160 } 3161 3162 // init transport 3163 if (hci_stack->hci_transport->init){ 3164 hci_stack->hci_transport->init(hci_stack->config); 3165 } 3166 3167 // open transport 3168 err = hci_stack->hci_transport->open(); 3169 if (err){ 3170 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3171 if (hci_stack->control && hci_stack->control->off){ 3172 (*hci_stack->control->off)(); 3173 } 3174 hci_emit_hci_open_failed(); 3175 return err; 3176 } 3177 return 0; 3178 } 3179 3180 static void hci_power_control_off(void){ 3181 3182 log_info("hci_power_control_off"); 3183 3184 // close low-level device 3185 hci_stack->hci_transport->close(); 3186 3187 log_info("hci_power_control_off - hci_transport closed"); 3188 3189 // power off 3190 if (hci_stack->control && hci_stack->control->off){ 3191 (*hci_stack->control->off)(); 3192 } 3193 3194 log_info("hci_power_control_off - control closed"); 3195 3196 hci_stack->state = HCI_STATE_OFF; 3197 } 3198 3199 static void hci_power_control_sleep(void){ 3200 3201 log_info("hci_power_control_sleep"); 3202 3203 #if 0 3204 // don't close serial port during sleep 3205 3206 // close low-level device 3207 hci_stack->hci_transport->close(hci_stack->config); 3208 #endif 3209 3210 // sleep mode 3211 if (hci_stack->control && hci_stack->control->sleep){ 3212 (*hci_stack->control->sleep)(); 3213 } 3214 3215 hci_stack->state = HCI_STATE_SLEEPING; 3216 } 3217 3218 static int hci_power_control_wake(void){ 3219 3220 log_info("hci_power_control_wake"); 3221 3222 // wake on 3223 if (hci_stack->control && hci_stack->control->wake){ 3224 (*hci_stack->control->wake)(); 3225 } 3226 3227 #if 0 3228 // open low-level device 3229 int err = hci_stack->hci_transport->open(hci_stack->config); 3230 if (err){ 3231 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3232 if (hci_stack->control && hci_stack->control->off){ 3233 (*hci_stack->control->off)(); 3234 } 3235 hci_emit_hci_open_failed(); 3236 return err; 3237 } 3238 #endif 3239 3240 return 0; 3241 } 3242 3243 static void hci_power_transition_to_initializing(void){ 3244 // set up state machine 3245 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3246 hci_stack->hci_packet_buffer_reserved = 0; 3247 hci_stack->state = HCI_STATE_INITIALIZING; 3248 hci_stack->substate = HCI_INIT_SEND_RESET; 3249 } 3250 3251 int hci_power_control(HCI_POWER_MODE power_mode){ 3252 3253 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3254 3255 int err = 0; 3256 switch (hci_stack->state){ 3257 3258 case HCI_STATE_OFF: 3259 switch (power_mode){ 3260 case HCI_POWER_ON: 3261 err = hci_power_control_on(); 3262 if (err) { 3263 log_error("hci_power_control_on() error %d", err); 3264 return err; 3265 } 3266 hci_power_transition_to_initializing(); 3267 break; 3268 case HCI_POWER_OFF: 3269 // do nothing 3270 break; 3271 case HCI_POWER_SLEEP: 3272 // do nothing (with SLEEP == OFF) 3273 break; 3274 } 3275 break; 3276 3277 case HCI_STATE_INITIALIZING: 3278 switch (power_mode){ 3279 case HCI_POWER_ON: 3280 // do nothing 3281 break; 3282 case HCI_POWER_OFF: 3283 // no connections yet, just turn it off 3284 hci_power_control_off(); 3285 break; 3286 case HCI_POWER_SLEEP: 3287 // no connections yet, just turn it off 3288 hci_power_control_sleep(); 3289 break; 3290 } 3291 break; 3292 3293 case HCI_STATE_WORKING: 3294 switch (power_mode){ 3295 case HCI_POWER_ON: 3296 // do nothing 3297 break; 3298 case HCI_POWER_OFF: 3299 // see hci_run 3300 hci_stack->state = HCI_STATE_HALTING; 3301 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3302 break; 3303 case HCI_POWER_SLEEP: 3304 // see hci_run 3305 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3306 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3307 break; 3308 } 3309 break; 3310 3311 case HCI_STATE_HALTING: 3312 switch (power_mode){ 3313 case HCI_POWER_ON: 3314 hci_power_transition_to_initializing(); 3315 break; 3316 case HCI_POWER_OFF: 3317 // do nothing 3318 break; 3319 case HCI_POWER_SLEEP: 3320 // see hci_run 3321 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3322 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3323 break; 3324 } 3325 break; 3326 3327 case HCI_STATE_FALLING_ASLEEP: 3328 switch (power_mode){ 3329 case HCI_POWER_ON: 3330 3331 #ifdef HAVE_PLATFORM_IPHONE_OS 3332 // nothing to do, if H4 supports power management 3333 if (btstack_control_iphone_power_management_enabled()){ 3334 hci_stack->state = HCI_STATE_INITIALIZING; 3335 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3336 break; 3337 } 3338 #endif 3339 hci_power_transition_to_initializing(); 3340 break; 3341 case HCI_POWER_OFF: 3342 // see hci_run 3343 hci_stack->state = HCI_STATE_HALTING; 3344 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3345 break; 3346 case HCI_POWER_SLEEP: 3347 // do nothing 3348 break; 3349 } 3350 break; 3351 3352 case HCI_STATE_SLEEPING: 3353 switch (power_mode){ 3354 case HCI_POWER_ON: 3355 3356 #ifdef HAVE_PLATFORM_IPHONE_OS 3357 // nothing to do, if H4 supports power management 3358 if (btstack_control_iphone_power_management_enabled()){ 3359 hci_stack->state = HCI_STATE_INITIALIZING; 3360 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3361 hci_update_scan_enable(); 3362 break; 3363 } 3364 #endif 3365 err = hci_power_control_wake(); 3366 if (err) return err; 3367 hci_power_transition_to_initializing(); 3368 break; 3369 case HCI_POWER_OFF: 3370 hci_stack->state = HCI_STATE_HALTING; 3371 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3372 break; 3373 case HCI_POWER_SLEEP: 3374 // do nothing 3375 break; 3376 } 3377 break; 3378 } 3379 3380 // create internal event 3381 hci_emit_state(); 3382 3383 // trigger next/first action 3384 hci_run(); 3385 3386 return 0; 3387 } 3388 3389 3390 #ifdef ENABLE_CLASSIC 3391 3392 static void hci_update_scan_enable(void){ 3393 // 2 = page scan, 1 = inq scan 3394 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3395 hci_run(); 3396 } 3397 3398 void gap_discoverable_control(uint8_t enable){ 3399 if (enable) enable = 1; // normalize argument 3400 3401 if (hci_stack->discoverable == enable){ 3402 hci_emit_discoverable_enabled(hci_stack->discoverable); 3403 return; 3404 } 3405 3406 hci_stack->discoverable = enable; 3407 hci_update_scan_enable(); 3408 } 3409 3410 void gap_connectable_control(uint8_t enable){ 3411 if (enable) enable = 1; // normalize argument 3412 3413 // don't emit event 3414 if (hci_stack->connectable == enable) return; 3415 3416 hci_stack->connectable = enable; 3417 hci_update_scan_enable(); 3418 } 3419 #endif 3420 3421 void gap_local_bd_addr(bd_addr_t address_buffer){ 3422 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3423 } 3424 3425 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3426 static void hci_host_num_completed_packets(void){ 3427 3428 // create packet manually as arrays are not supported and num_commands should not get reduced 3429 hci_reserve_packet_buffer(); 3430 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3431 3432 uint16_t size = 0; 3433 uint16_t num_handles = 0; 3434 packet[size++] = 0x35; 3435 packet[size++] = 0x0c; 3436 size++; // skip param len 3437 size++; // skip num handles 3438 3439 // add { handle, packets } entries 3440 btstack_linked_item_t * it; 3441 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3442 hci_connection_t * connection = (hci_connection_t *) it; 3443 if (connection->num_packets_completed){ 3444 little_endian_store_16(packet, size, connection->con_handle); 3445 size += 2; 3446 little_endian_store_16(packet, size, connection->num_packets_completed); 3447 size += 2; 3448 // 3449 num_handles++; 3450 connection->num_packets_completed = 0; 3451 } 3452 } 3453 3454 packet[2] = size - 3; 3455 packet[3] = num_handles; 3456 3457 hci_stack->host_completed_packets = 0; 3458 3459 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3460 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3461 3462 // release packet buffer for synchronous transport implementations 3463 if (hci_transport_synchronous()){ 3464 hci_release_packet_buffer(); 3465 hci_emit_transport_packet_sent(); 3466 } 3467 } 3468 #endif 3469 3470 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3471 UNUSED(ds); 3472 hci_stack->substate = HCI_HALTING_CLOSE; 3473 // allow packet handlers to defer final shutdown 3474 hci_emit_state(); 3475 hci_run(); 3476 } 3477 3478 static bool hci_run_acl_fragments(void){ 3479 if (hci_stack->acl_fragmentation_total_size > 0) { 3480 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3481 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3482 if (connection) { 3483 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3484 hci_send_acl_packet_fragments(connection); 3485 return true; 3486 } 3487 } else { 3488 // connection gone -> discard further fragments 3489 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3490 hci_stack->acl_fragmentation_total_size = 0; 3491 hci_stack->acl_fragmentation_pos = 0; 3492 } 3493 } 3494 return false; 3495 } 3496 3497 #ifdef ENABLE_CLASSIC 3498 static bool hci_run_general_gap_classic(void){ 3499 3500 // decline incoming connections 3501 if (hci_stack->decline_reason){ 3502 uint8_t reason = hci_stack->decline_reason; 3503 hci_stack->decline_reason = 0; 3504 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3505 return true; 3506 } 3507 // send scan enable 3508 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3509 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3510 hci_stack->new_scan_enable_value = 0xff; 3511 return true; 3512 } 3513 // start/stop inquiry 3514 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3515 uint8_t duration = hci_stack->inquiry_state; 3516 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3517 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3518 return true; 3519 } 3520 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3521 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3522 hci_send_cmd(&hci_inquiry_cancel); 3523 return true; 3524 } 3525 // remote name request 3526 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3527 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3528 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3529 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3530 return true; 3531 } 3532 // pairing 3533 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3534 uint8_t state = hci_stack->gap_pairing_state; 3535 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3536 switch (state){ 3537 case GAP_PAIRING_STATE_SEND_PIN: 3538 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, strlen(hci_stack->gap_pairing_input.gap_pairing_pin), hci_stack->gap_pairing_input.gap_pairing_pin); 3539 break; 3540 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3541 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3542 break; 3543 case GAP_PAIRING_STATE_SEND_PASSKEY: 3544 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3545 break; 3546 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3547 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3548 break; 3549 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3550 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3551 break; 3552 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3553 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3554 break; 3555 default: 3556 break; 3557 } 3558 return true; 3559 } 3560 return false; 3561 } 3562 #endif 3563 3564 #ifdef ENABLE_BLE 3565 static bool hci_run_general_gap_le(void){ 3566 3567 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3568 3569 if (hci_stack->state != HCI_STATE_WORKING) return false; 3570 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0) ) return false; 3571 3572 #ifdef ENABLE_LE_CENTRAL 3573 // parameter change requires scanning to be stopped first 3574 if (hci_stack->le_scan_type != 0xff) { 3575 if (hci_stack->le_scanning_active){ 3576 hci_stack->le_scanning_active = 0; 3577 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3578 } else { 3579 int scan_type = (int) hci_stack->le_scan_type; 3580 hci_stack->le_scan_type = 0xff; 3581 hci_send_cmd(&hci_le_set_scan_parameters, scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, 0); 3582 } 3583 return true; 3584 } 3585 // finally, we can enable/disable le scan 3586 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3587 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3588 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3589 return true; 3590 } 3591 #endif 3592 #ifdef ENABLE_LE_PERIPHERAL 3593 // le advertisement control 3594 if (hci_stack->le_advertisements_todo){ 3595 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3596 } 3597 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3598 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3599 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3600 return true; 3601 } 3602 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3603 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3604 hci_send_cmd(&hci_le_set_advertising_parameters, 3605 hci_stack->le_advertisements_interval_min, 3606 hci_stack->le_advertisements_interval_max, 3607 hci_stack->le_advertisements_type, 3608 hci_stack->le_own_addr_type, 3609 hci_stack->le_advertisements_direct_address_type, 3610 hci_stack->le_advertisements_direct_address, 3611 hci_stack->le_advertisements_channel_map, 3612 hci_stack->le_advertisements_filter_policy); 3613 return true; 3614 } 3615 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3616 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3617 uint8_t adv_data_clean[31]; 3618 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3619 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3620 hci_stack->le_advertisements_data_len); 3621 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3622 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3623 return true; 3624 } 3625 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3626 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3627 uint8_t scan_data_clean[31]; 3628 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3629 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3630 hci_stack->le_scan_response_data_len); 3631 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3632 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3633 return true; 3634 } 3635 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3636 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3637 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3638 return true; 3639 } 3640 #endif 3641 3642 #ifdef ENABLE_LE_CENTRAL 3643 // 3644 // LE Whitelist Management 3645 // 3646 3647 // check if whitelist needs modification 3648 btstack_linked_list_iterator_t lit; 3649 int modification_pending = 0; 3650 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3651 while (btstack_linked_list_iterator_has_next(&lit)){ 3652 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3653 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3654 modification_pending = 1; 3655 break; 3656 } 3657 } 3658 3659 if (modification_pending){ 3660 // stop connnecting if modification pending 3661 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3662 hci_send_cmd(&hci_le_create_connection_cancel); 3663 return true; 3664 } 3665 3666 // add/remove entries 3667 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3668 while (btstack_linked_list_iterator_has_next(&lit)){ 3669 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3670 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3671 entry->state = LE_WHITELIST_ON_CONTROLLER; 3672 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3673 return true; 3674 } 3675 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3676 bd_addr_t address; 3677 bd_addr_type_t address_type = entry->address_type; 3678 (void)memcpy(address, entry->address, 6); 3679 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3680 btstack_memory_whitelist_entry_free(entry); 3681 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3682 return true; 3683 } 3684 } 3685 } 3686 3687 // start connecting 3688 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && 3689 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3690 bd_addr_t null_addr; 3691 memset(null_addr, 0, 6); 3692 hci_send_cmd(&hci_le_create_connection, 3693 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3694 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3695 1, // use whitelist 3696 0, // peer address type 3697 null_addr, // peer bd addr 3698 hci_stack->le_own_addr_type, // our addr type: 3699 hci_stack->le_connection_interval_min, // conn interval min 3700 hci_stack->le_connection_interval_max, // conn interval max 3701 hci_stack->le_connection_latency, // conn latency 3702 hci_stack->le_supervision_timeout, // conn latency 3703 hci_stack->le_minimum_ce_length, // min ce length 3704 hci_stack->le_maximum_ce_length // max ce length 3705 ); 3706 return true; 3707 } 3708 #endif 3709 return false; 3710 } 3711 #endif 3712 3713 static bool hci_run_general_pending_commmands(void){ 3714 btstack_linked_item_t * it; 3715 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3716 hci_connection_t * connection = (hci_connection_t *) it; 3717 3718 switch(connection->state){ 3719 case SEND_CREATE_CONNECTION: 3720 switch(connection->address_type){ 3721 #ifdef ENABLE_CLASSIC 3722 case BD_ADDR_TYPE_ACL: 3723 log_info("sending hci_create_connection"); 3724 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3725 break; 3726 #endif 3727 default: 3728 #ifdef ENABLE_BLE 3729 #ifdef ENABLE_LE_CENTRAL 3730 // track outgoing connection 3731 hci_stack->outgoing_addr_type = connection->address_type; 3732 (void)memcpy(hci_stack->outgoing_addr, 3733 connection->address, 6); 3734 log_info("sending hci_le_create_connection"); 3735 hci_send_cmd(&hci_le_create_connection, 3736 hci_stack->le_connection_scan_interval, // conn scan interval 3737 hci_stack->le_connection_scan_window, // conn scan windows 3738 0, // don't use whitelist 3739 connection->address_type, // peer address type 3740 connection->address, // peer bd addr 3741 hci_stack->le_own_addr_type, // our addr type: 3742 hci_stack->le_connection_interval_min, // conn interval min 3743 hci_stack->le_connection_interval_max, // conn interval max 3744 hci_stack->le_connection_latency, // conn latency 3745 hci_stack->le_supervision_timeout, // conn latency 3746 hci_stack->le_minimum_ce_length, // min ce length 3747 hci_stack->le_maximum_ce_length // max ce length 3748 ); 3749 connection->state = SENT_CREATE_CONNECTION; 3750 #endif 3751 #endif 3752 break; 3753 } 3754 return true; 3755 3756 #ifdef ENABLE_CLASSIC 3757 case RECEIVED_CONNECTION_REQUEST: 3758 connection->role = HCI_ROLE_SLAVE; 3759 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3760 log_info("sending hci_accept_connection_request"); 3761 connection->state = ACCEPTED_CONNECTION_REQUEST; 3762 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3763 } 3764 return true; 3765 #endif 3766 3767 #ifdef ENABLE_BLE 3768 #ifdef ENABLE_LE_CENTRAL 3769 case SEND_CANCEL_CONNECTION: 3770 connection->state = SENT_CANCEL_CONNECTION; 3771 hci_send_cmd(&hci_le_create_connection_cancel); 3772 return true; 3773 #endif 3774 #endif 3775 case SEND_DISCONNECT: 3776 connection->state = SENT_DISCONNECT; 3777 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3778 return true; 3779 3780 default: 3781 break; 3782 } 3783 3784 // no further commands if connection is about to get shut down 3785 if (connection->state == SENT_DISCONNECT) continue; 3786 3787 if (connection->authentication_flags & READ_RSSI){ 3788 connectionClearAuthenticationFlags(connection, READ_RSSI); 3789 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3790 return true; 3791 } 3792 3793 #ifdef ENABLE_CLASSIC 3794 3795 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 3796 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 3797 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 3798 return true; 3799 } 3800 3801 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3802 log_info("responding to link key request"); 3803 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3804 link_key_t link_key; 3805 link_key_type_t link_key_type; 3806 if ( hci_stack->link_key_db 3807 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3808 && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level)){ 3809 connection->link_key_type = link_key_type; 3810 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3811 } else { 3812 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3813 } 3814 return true; 3815 } 3816 3817 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3818 log_info("denying to pin request"); 3819 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3820 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3821 return true; 3822 } 3823 3824 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3825 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3826 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3827 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3828 // tweak authentication requirements 3829 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3830 if (connection->bonding_flags & BONDING_DEDICATED){ 3831 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3832 } 3833 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3834 authreq |= 1; 3835 } 3836 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3837 } else { 3838 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3839 } 3840 return true; 3841 } 3842 3843 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3844 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3845 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3846 return true; 3847 } 3848 3849 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3850 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3851 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3852 return true; 3853 } 3854 3855 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 3856 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 3857 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3858 return true; 3859 } 3860 3861 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 3862 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3863 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 3864 return true; 3865 } 3866 3867 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 3868 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3869 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 3870 return true; 3871 } 3872 3873 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3874 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3875 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3876 connection->state = SENT_DISCONNECT; 3877 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3878 return true; 3879 } 3880 3881 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3882 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3883 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3884 return true; 3885 } 3886 3887 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3888 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3889 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3890 return true; 3891 } 3892 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3893 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3894 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3895 return true; 3896 } 3897 #endif 3898 3899 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3900 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3901 if (connection->state != SENT_DISCONNECT){ 3902 connection->state = SENT_DISCONNECT; 3903 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 3904 return true; 3905 } 3906 } 3907 3908 #ifdef ENABLE_CLASSIC 3909 uint16_t sniff_min_interval; 3910 switch (connection->sniff_min_interval){ 3911 case 0: 3912 break; 3913 case 0xffff: 3914 connection->sniff_min_interval = 0; 3915 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3916 return true; 3917 default: 3918 sniff_min_interval = connection->sniff_min_interval; 3919 connection->sniff_min_interval = 0; 3920 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3921 return true; 3922 } 3923 #endif 3924 3925 #ifdef ENABLE_BLE 3926 switch (connection->le_con_parameter_update_state){ 3927 // response to L2CAP CON PARAMETER UPDATE REQUEST 3928 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3929 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3930 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3931 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3932 0x0000, 0xffff); 3933 return true; 3934 case CON_PARAMETER_UPDATE_REPLY: 3935 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3936 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3937 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3938 0x0000, 0xffff); 3939 return true; 3940 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3941 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3942 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3943 return true; 3944 default: 3945 break; 3946 } 3947 if (connection->le_phy_update_all_phys != 0xff){ 3948 uint8_t all_phys = connection->le_phy_update_all_phys; 3949 connection->le_phy_update_all_phys = 0xff; 3950 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); 3951 return true; 3952 } 3953 #endif 3954 } 3955 return false; 3956 } 3957 3958 static void hci_run(void){ 3959 3960 bool done; 3961 3962 // send continuation fragments first, as they block the prepared packet buffer 3963 done = hci_run_acl_fragments(); 3964 if (done) return; 3965 3966 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3967 // send host num completed packets next as they don't require num_cmd_packets > 0 3968 if (!hci_can_send_comand_packet_transport()) return; 3969 if (hci_stack->host_completed_packets){ 3970 hci_host_num_completed_packets(); 3971 return; 3972 } 3973 #endif 3974 3975 if (!hci_can_send_command_packet_now()) return; 3976 3977 // global/non-connection oriented commands 3978 3979 3980 #ifdef ENABLE_CLASSIC 3981 // general gap classic 3982 done = hci_run_general_gap_classic(); 3983 if (done) return; 3984 #endif 3985 3986 #ifdef ENABLE_BLE 3987 // general gap le 3988 done = hci_run_general_gap_le(); 3989 if (done) return; 3990 #endif 3991 3992 // send pending HCI commands 3993 done = hci_run_general_pending_commmands(); 3994 if (done) return; 3995 3996 // stack state sub statemachines 3997 hci_connection_t * connection; 3998 switch (hci_stack->state){ 3999 case HCI_STATE_INITIALIZING: 4000 hci_initializing_run(); 4001 break; 4002 4003 case HCI_STATE_HALTING: 4004 4005 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4006 switch (hci_stack->substate){ 4007 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4008 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4009 4010 #ifdef ENABLE_BLE 4011 #ifdef ENABLE_LE_CENTRAL 4012 // free whitelist entries 4013 { 4014 btstack_linked_list_iterator_t lit; 4015 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4016 while (btstack_linked_list_iterator_has_next(&lit)){ 4017 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4018 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4019 btstack_memory_whitelist_entry_free(entry); 4020 } 4021 } 4022 #endif 4023 #endif 4024 // close all open connections 4025 connection = (hci_connection_t *) hci_stack->connections; 4026 if (connection){ 4027 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4028 if (!hci_can_send_command_packet_now()) return; 4029 4030 // check state 4031 if (connection->state == SENT_DISCONNECT) return; 4032 connection->state = SENT_DISCONNECT; 4033 4034 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4035 4036 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4037 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4038 4039 // ... which would be ignored anyway as we shutdown (free) the connection now 4040 hci_shutdown_connection(connection); 4041 4042 // finally, send the disconnect command 4043 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4044 return; 4045 } 4046 4047 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4048 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4049 log_info("HCI_STATE_HALTING: wait 50 ms"); 4050 hci_stack->substate = HCI_HALTING_W4_TIMER; 4051 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4052 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4053 btstack_run_loop_add_timer(&hci_stack->timeout); 4054 break; 4055 } 4056 4057 /* fall through */ 4058 4059 case HCI_HALTING_CLOSE: 4060 log_info("HCI_STATE_HALTING, calling off"); 4061 4062 // switch mode 4063 hci_power_control_off(); 4064 4065 log_info("HCI_STATE_HALTING, emitting state"); 4066 hci_emit_state(); 4067 log_info("HCI_STATE_HALTING, done"); 4068 break; 4069 4070 case HCI_HALTING_W4_TIMER: 4071 // keep waiting 4072 4073 break; 4074 default: 4075 break; 4076 } 4077 4078 break; 4079 4080 case HCI_STATE_FALLING_ASLEEP: 4081 switch(hci_stack->substate) { 4082 case HCI_FALLING_ASLEEP_DISCONNECT: 4083 log_info("HCI_STATE_FALLING_ASLEEP"); 4084 // close all open connections 4085 connection = (hci_connection_t *) hci_stack->connections; 4086 4087 #ifdef HAVE_PLATFORM_IPHONE_OS 4088 // don't close connections, if H4 supports power management 4089 if (btstack_control_iphone_power_management_enabled()){ 4090 connection = NULL; 4091 } 4092 #endif 4093 if (connection){ 4094 4095 // send disconnect 4096 if (!hci_can_send_command_packet_now()) return; 4097 4098 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4099 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4100 4101 // send disconnected event right away - causes higher layer connections to get closed, too. 4102 hci_shutdown_connection(connection); 4103 return; 4104 } 4105 4106 if (hci_classic_supported()){ 4107 // disable page and inquiry scan 4108 if (!hci_can_send_command_packet_now()) return; 4109 4110 log_info("HCI_STATE_HALTING, disabling inq scans"); 4111 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4112 4113 // continue in next sub state 4114 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4115 break; 4116 } 4117 4118 /* fall through */ 4119 4120 case HCI_FALLING_ASLEEP_COMPLETE: 4121 log_info("HCI_STATE_HALTING, calling sleep"); 4122 #ifdef HAVE_PLATFORM_IPHONE_OS 4123 // don't actually go to sleep, if H4 supports power management 4124 if (btstack_control_iphone_power_management_enabled()){ 4125 // SLEEP MODE reached 4126 hci_stack->state = HCI_STATE_SLEEPING; 4127 hci_emit_state(); 4128 break; 4129 } 4130 #endif 4131 // switch mode 4132 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4133 hci_emit_state(); 4134 break; 4135 4136 default: 4137 break; 4138 } 4139 break; 4140 4141 default: 4142 break; 4143 } 4144 } 4145 4146 int hci_send_cmd_packet(uint8_t *packet, int size){ 4147 // house-keeping 4148 4149 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 4150 hci_stack->loopback_mode = packet[3]; 4151 } 4152 4153 #ifdef ENABLE_CLASSIC 4154 bd_addr_t addr; 4155 hci_connection_t * conn; 4156 4157 // create_connection? 4158 if (IS_COMMAND(packet, hci_create_connection)){ 4159 reverse_bd_addr(&packet[3], addr); 4160 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4161 4162 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4163 if (!conn){ 4164 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4165 if (!conn){ 4166 // notify client that alloc failed 4167 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4168 return -1; // packet not sent to controller 4169 } 4170 conn->state = SEND_CREATE_CONNECTION; 4171 } 4172 log_info("conn state %u", conn->state); 4173 switch (conn->state){ 4174 // if connection active exists 4175 case OPEN: 4176 // and OPEN, emit connection complete command 4177 hci_emit_connection_complete(addr, conn->con_handle, 0); 4178 return -1; // packet not sent to controller 4179 case RECEIVED_DISCONNECTION_COMPLETE: 4180 // create connection triggered in disconnect complete event, let's do it now 4181 break; 4182 case SEND_CREATE_CONNECTION: 4183 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4184 break; 4185 default: 4186 // otherwise, just ignore as it is already in the open process 4187 return -1; // packet not sent to controller 4188 } 4189 conn->state = SENT_CREATE_CONNECTION; 4190 4191 // track outgoing connection 4192 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4193 (void)memcpy(hci_stack->outgoing_addr, addr, 6); 4194 } 4195 4196 else if (IS_COMMAND(packet, hci_link_key_request_reply)){ 4197 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4198 } 4199 else if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 4200 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4201 } 4202 4203 else if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 4204 if (hci_stack->link_key_db){ 4205 reverse_bd_addr(&packet[3], addr); 4206 hci_stack->link_key_db->delete_link_key(addr); 4207 } 4208 } 4209 4210 else if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 4211 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 4212 reverse_bd_addr(&packet[3], addr); 4213 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4214 if (conn){ 4215 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4216 } 4217 } 4218 4219 else if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 4220 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 4221 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 4222 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 4223 reverse_bd_addr(&packet[3], addr); 4224 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4225 if (conn){ 4226 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4227 } 4228 } 4229 4230 #ifdef ENABLE_SCO_OVER_HCI 4231 // setup_synchronous_connection? Voice setting at offset 22 4232 else if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 4233 // TODO: compare to current setting if sco connection already active 4234 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4235 } 4236 // accept_synchronus_connection? Voice setting at offset 18 4237 else if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 4238 // TODO: compare to current setting if sco connection already active 4239 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4240 } 4241 #endif 4242 #endif 4243 4244 #ifdef ENABLE_BLE 4245 else if (IS_COMMAND(packet, hci_le_set_random_address)){ 4246 hci_stack->le_random_address_set = 1; 4247 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4248 } 4249 #ifdef ENABLE_LE_PERIPHERAL 4250 else if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 4251 hci_stack->le_advertisements_active = packet[3]; 4252 } 4253 #endif 4254 #ifdef ENABLE_LE_CENTRAL 4255 else if (IS_COMMAND(packet, hci_le_create_connection)){ 4256 // white list used? 4257 uint8_t initiator_filter_policy = packet[7]; 4258 switch (initiator_filter_policy){ 4259 case 0: 4260 // whitelist not used 4261 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4262 break; 4263 case 1: 4264 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4265 break; 4266 default: 4267 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4268 break; 4269 } 4270 } 4271 else if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 4272 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4273 } 4274 #endif 4275 #endif 4276 4277 hci_stack->num_cmd_packets--; 4278 4279 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4280 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4281 } 4282 4283 // disconnect because of security block 4284 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4285 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4286 if (!connection) return; 4287 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4288 } 4289 4290 4291 // Configure Secure Simple Pairing 4292 4293 #ifdef ENABLE_CLASSIC 4294 4295 // enable will enable SSP during init 4296 void gap_ssp_set_enable(int enable){ 4297 hci_stack->ssp_enable = enable; 4298 } 4299 4300 static int hci_local_ssp_activated(void){ 4301 return gap_ssp_supported() && hci_stack->ssp_enable; 4302 } 4303 4304 // if set, BTstack will respond to io capability request using authentication requirement 4305 void gap_ssp_set_io_capability(int io_capability){ 4306 hci_stack->ssp_io_capability = io_capability; 4307 } 4308 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4309 hci_stack->ssp_authentication_requirement = authentication_requirement; 4310 } 4311 4312 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4313 void gap_ssp_set_auto_accept(int auto_accept){ 4314 hci_stack->ssp_auto_accept = auto_accept; 4315 } 4316 4317 void gap_secure_connections_enable(bool enable){ 4318 hci_stack->secure_connections_enable = enable; 4319 } 4320 4321 #endif 4322 4323 // va_list part of hci_send_cmd 4324 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4325 if (!hci_can_send_command_packet_now()){ 4326 log_error("hci_send_cmd called but cannot send packet now"); 4327 return 0; 4328 } 4329 4330 // for HCI INITIALIZATION 4331 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4332 hci_stack->last_cmd_opcode = cmd->opcode; 4333 4334 hci_reserve_packet_buffer(); 4335 uint8_t * packet = hci_stack->hci_packet_buffer; 4336 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4337 int err = hci_send_cmd_packet(packet, size); 4338 4339 // release packet buffer on error or for synchronous transport implementations 4340 if ((err < 0) || hci_transport_synchronous()){ 4341 hci_release_packet_buffer(); 4342 hci_emit_transport_packet_sent(); 4343 } 4344 4345 return err; 4346 } 4347 4348 /** 4349 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4350 */ 4351 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4352 va_list argptr; 4353 va_start(argptr, cmd); 4354 int res = hci_send_cmd_va_arg(cmd, argptr); 4355 va_end(argptr); 4356 return res; 4357 } 4358 4359 // Create various non-HCI events. 4360 // TODO: generalize, use table similar to hci_create_command 4361 4362 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4363 // dump packet 4364 if (dump) { 4365 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4366 } 4367 4368 // dispatch to all event handlers 4369 btstack_linked_list_iterator_t it; 4370 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4371 while (btstack_linked_list_iterator_has_next(&it)){ 4372 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4373 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4374 } 4375 } 4376 4377 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4378 if (!hci_stack->acl_packet_handler) return; 4379 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4380 } 4381 4382 #ifdef ENABLE_CLASSIC 4383 static void hci_notify_if_sco_can_send_now(void){ 4384 // notify SCO sender if waiting 4385 if (!hci_stack->sco_waiting_for_can_send_now) return; 4386 if (hci_can_send_sco_packet_now()){ 4387 hci_stack->sco_waiting_for_can_send_now = 0; 4388 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4389 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4390 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4391 } 4392 } 4393 4394 // parsing end emitting has been merged to reduce code size 4395 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4396 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4397 4398 uint8_t * eir_data; 4399 ad_context_t context; 4400 const uint8_t * name; 4401 uint8_t name_len; 4402 4403 if (size < 3) return; 4404 4405 int event_type = hci_event_packet_get_type(packet); 4406 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4407 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4408 4409 switch (event_type){ 4410 case HCI_EVENT_INQUIRY_RESULT: 4411 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4412 if (size != (3 + (num_responses * 14))) return; 4413 break; 4414 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4415 if (size != 257) return; 4416 if (num_responses != 1) return; 4417 break; 4418 default: 4419 return; 4420 } 4421 4422 // event[1] is set at the end 4423 int i; 4424 for (i=0; i<num_responses;i++){ 4425 memset(event, 0, sizeof(event)); 4426 event[0] = GAP_EVENT_INQUIRY_RESULT; 4427 uint8_t event_size = 18; // if name is not set by EIR 4428 4429 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4430 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4431 (void)memcpy(&event[9], 4432 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4433 3); // class of device 4434 (void)memcpy(&event[12], 4435 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4436 2); // clock offset 4437 4438 switch (event_type){ 4439 case HCI_EVENT_INQUIRY_RESULT: 4440 // 14,15,16,17 = 0, size 18 4441 break; 4442 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4443 event[14] = 1; 4444 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4445 // 16,17 = 0, size 18 4446 break; 4447 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4448 event[14] = 1; 4449 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4450 // EIR packets only contain a single inquiry response 4451 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4452 name = NULL; 4453 // Iterate over EIR data 4454 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4455 uint8_t data_type = ad_iterator_get_data_type(&context); 4456 uint8_t data_size = ad_iterator_get_data_len(&context); 4457 const uint8_t * data = ad_iterator_get_data(&context); 4458 // Prefer Complete Local Name over Shortend Local Name 4459 switch (data_type){ 4460 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4461 if (name) continue; 4462 /* fall through */ 4463 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4464 name = data; 4465 name_len = data_size; 4466 break; 4467 default: 4468 break; 4469 } 4470 } 4471 if (name){ 4472 event[16] = 1; 4473 // truncate name if needed 4474 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4475 event[17] = len; 4476 (void)memcpy(&event[18], name, len); 4477 event_size += len; 4478 } 4479 break; 4480 } 4481 event[1] = event_size - 2; 4482 hci_emit_event(event, event_size, 1); 4483 } 4484 } 4485 #endif 4486 4487 void hci_emit_state(void){ 4488 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4489 uint8_t event[3]; 4490 event[0] = BTSTACK_EVENT_STATE; 4491 event[1] = sizeof(event) - 2; 4492 event[2] = hci_stack->state; 4493 hci_emit_event(event, sizeof(event), 1); 4494 } 4495 4496 #ifdef ENABLE_CLASSIC 4497 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4498 uint8_t event[13]; 4499 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4500 event[1] = sizeof(event) - 2; 4501 event[2] = status; 4502 little_endian_store_16(event, 3, con_handle); 4503 reverse_bd_addr(address, &event[5]); 4504 event[11] = 1; // ACL connection 4505 event[12] = 0; // encryption disabled 4506 hci_emit_event(event, sizeof(event), 1); 4507 } 4508 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4509 if (disable_l2cap_timeouts) return; 4510 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4511 uint8_t event[4]; 4512 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4513 event[1] = sizeof(event) - 2; 4514 little_endian_store_16(event, 2, conn->con_handle); 4515 hci_emit_event(event, sizeof(event), 1); 4516 } 4517 #endif 4518 4519 #ifdef ENABLE_BLE 4520 #ifdef ENABLE_LE_CENTRAL 4521 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4522 uint8_t event[21]; 4523 event[0] = HCI_EVENT_LE_META; 4524 event[1] = sizeof(event) - 2; 4525 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4526 event[3] = status; 4527 little_endian_store_16(event, 4, con_handle); 4528 event[6] = 0; // TODO: role 4529 event[7] = address_type; 4530 reverse_bd_addr(address, &event[8]); 4531 little_endian_store_16(event, 14, 0); // interval 4532 little_endian_store_16(event, 16, 0); // latency 4533 little_endian_store_16(event, 18, 0); // supervision timeout 4534 event[20] = 0; // master clock accuracy 4535 hci_emit_event(event, sizeof(event), 1); 4536 } 4537 #endif 4538 #endif 4539 4540 static void hci_emit_transport_packet_sent(void){ 4541 // notify upper stack that it might be possible to send again 4542 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4543 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4544 } 4545 4546 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4547 uint8_t event[6]; 4548 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4549 event[1] = sizeof(event) - 2; 4550 event[2] = 0; // status = OK 4551 little_endian_store_16(event, 3, con_handle); 4552 event[5] = reason; 4553 hci_emit_event(event, sizeof(event), 1); 4554 } 4555 4556 static void hci_emit_nr_connections_changed(void){ 4557 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4558 uint8_t event[3]; 4559 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4560 event[1] = sizeof(event) - 2; 4561 event[2] = nr_hci_connections(); 4562 hci_emit_event(event, sizeof(event), 1); 4563 } 4564 4565 static void hci_emit_hci_open_failed(void){ 4566 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4567 uint8_t event[2]; 4568 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4569 event[1] = sizeof(event) - 2; 4570 hci_emit_event(event, sizeof(event), 1); 4571 } 4572 4573 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4574 log_info("hci_emit_dedicated_bonding_result %u ", status); 4575 uint8_t event[9]; 4576 int pos = 0; 4577 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4578 event[pos++] = sizeof(event) - 2; 4579 event[pos++] = status; 4580 reverse_bd_addr(address, &event[pos]); 4581 hci_emit_event(event, sizeof(event), 1); 4582 } 4583 4584 4585 #ifdef ENABLE_CLASSIC 4586 4587 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4588 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4589 uint8_t event[5]; 4590 int pos = 0; 4591 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4592 event[pos++] = sizeof(event) - 2; 4593 little_endian_store_16(event, 2, con_handle); 4594 pos += 2; 4595 event[pos++] = level; 4596 hci_emit_event(event, sizeof(event), 1); 4597 } 4598 4599 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4600 if (!connection) return LEVEL_0; 4601 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4602 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4603 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4604 // LEVEL 4 always requires 128 bit encrytion key size 4605 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4606 security_level = LEVEL_3; 4607 } 4608 return security_level; 4609 } 4610 4611 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4612 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4613 uint8_t event[3]; 4614 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4615 event[1] = sizeof(event) - 2; 4616 event[2] = enabled; 4617 hci_emit_event(event, sizeof(event), 1); 4618 } 4619 4620 // query if remote side supports eSCO 4621 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4622 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4623 if (!connection) return 0; 4624 return (connection->remote_supported_features[0] & 1) != 0; 4625 } 4626 4627 static bool hci_ssp_supported(hci_connection_t * connection){ 4628 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 4629 return (connection->bonding_flags & mask) == mask; 4630 } 4631 4632 // query if remote side supports SSP 4633 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4634 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4635 if (!connection) return 0; 4636 return hci_ssp_supported(connection) ? 1 : 0; 4637 } 4638 4639 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4640 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4641 } 4642 4643 // GAP API 4644 /** 4645 * @bbrief enable/disable bonding. default is enabled 4646 * @praram enabled 4647 */ 4648 void gap_set_bondable_mode(int enable){ 4649 hci_stack->bondable = enable ? 1 : 0; 4650 } 4651 /** 4652 * @brief Get bondable mode. 4653 * @return 1 if bondable 4654 */ 4655 int gap_get_bondable_mode(void){ 4656 return hci_stack->bondable; 4657 } 4658 4659 /** 4660 * @brief map link keys to security levels 4661 */ 4662 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4663 switch (link_key_type){ 4664 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4665 return LEVEL_4; 4666 case COMBINATION_KEY: 4667 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4668 return LEVEL_3; 4669 default: 4670 return LEVEL_2; 4671 } 4672 } 4673 4674 /** 4675 * @brief map link keys to secure connection yes/no 4676 */ 4677 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4678 switch (link_key_type){ 4679 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4680 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4681 return 1; 4682 default: 4683 return 0; 4684 } 4685 } 4686 4687 /** 4688 * @brief map link keys to authenticated 4689 */ 4690 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4691 switch (link_key_type){ 4692 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4693 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4694 return 1; 4695 default: 4696 return 0; 4697 } 4698 } 4699 4700 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4701 log_info("gap_mitm_protection_required_for_security_level %u", level); 4702 return level > LEVEL_2; 4703 } 4704 4705 /** 4706 * @brief get current security level 4707 */ 4708 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4709 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4710 if (!connection) return LEVEL_0; 4711 return gap_security_level_for_connection(connection); 4712 } 4713 4714 /** 4715 * @brief request connection to device to 4716 * @result GAP_AUTHENTICATION_RESULT 4717 */ 4718 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4719 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4720 if (!connection){ 4721 hci_emit_security_level(con_handle, LEVEL_0); 4722 return; 4723 } 4724 gap_security_level_t current_level = gap_security_level(con_handle); 4725 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4726 requested_level, connection->requested_security_level, current_level); 4727 4728 // assumption: earlier requested security higher than current level => security request is active 4729 if (current_level < connection->requested_security_level){ 4730 if (connection->requested_security_level < requested_level){ 4731 // increase requested level as new level is higher 4732 4733 // TODO: handle re-authentication when done 4734 4735 connection->requested_security_level = requested_level; 4736 } 4737 return; 4738 } 4739 4740 // no request active, notify if security sufficient 4741 if (requested_level <= current_level){ 4742 hci_emit_security_level(con_handle, current_level); 4743 return; 4744 } 4745 4746 // start pairing to increase security level 4747 connection->requested_security_level = requested_level; 4748 4749 #if 0 4750 // sending encryption request without a link key results in an error. 4751 // TODO: figure out how to use it properly 4752 4753 // would enabling ecnryption suffice (>= LEVEL_2)? 4754 if (hci_stack->link_key_db){ 4755 link_key_type_t link_key_type; 4756 link_key_t link_key; 4757 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4758 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4759 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4760 return; 4761 } 4762 } 4763 } 4764 #endif 4765 4766 // start to authenticate connection 4767 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4768 hci_run(); 4769 } 4770 4771 /** 4772 * @brief start dedicated bonding with device. disconnect after bonding 4773 * @param device 4774 * @param request MITM protection 4775 * @result GAP_DEDICATED_BONDING_COMPLETE 4776 */ 4777 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4778 4779 // create connection state machine 4780 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 4781 4782 if (!connection){ 4783 return BTSTACK_MEMORY_ALLOC_FAILED; 4784 } 4785 4786 // delete linkn key 4787 gap_drop_link_key_for_bd_addr(device); 4788 4789 // configure LEVEL_2/3, dedicated bonding 4790 connection->state = SEND_CREATE_CONNECTION; 4791 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4792 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4793 connection->bonding_flags = BONDING_DEDICATED; 4794 4795 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4796 4797 // handle: connnection failure (connection complete != ok) 4798 // handle: authentication failure 4799 // handle: disconnect on done 4800 4801 hci_run(); 4802 4803 return 0; 4804 } 4805 #endif 4806 4807 void gap_set_local_name(const char * local_name){ 4808 hci_stack->local_name = local_name; 4809 } 4810 4811 4812 #ifdef ENABLE_BLE 4813 4814 #ifdef ENABLE_LE_CENTRAL 4815 void gap_start_scan(void){ 4816 hci_stack->le_scanning_enabled = 1; 4817 hci_run(); 4818 } 4819 4820 void gap_stop_scan(void){ 4821 hci_stack->le_scanning_enabled = 0; 4822 hci_run(); 4823 } 4824 4825 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4826 hci_stack->le_scan_type = scan_type; 4827 hci_stack->le_scan_interval = scan_interval; 4828 hci_stack->le_scan_window = scan_window; 4829 hci_run(); 4830 } 4831 4832 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4833 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4834 if (!conn){ 4835 log_info("gap_connect: no connection exists yet, creating context"); 4836 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4837 if (!conn){ 4838 // notify client that alloc failed 4839 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4840 log_info("gap_connect: failed to alloc hci_connection_t"); 4841 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4842 } 4843 conn->state = SEND_CREATE_CONNECTION; 4844 log_info("gap_connect: send create connection next"); 4845 hci_run(); 4846 return ERROR_CODE_SUCCESS; 4847 } 4848 4849 if (!hci_is_le_connection(conn) || 4850 (conn->state == SEND_CREATE_CONNECTION) || 4851 (conn->state == SENT_CREATE_CONNECTION)) { 4852 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4853 log_error("gap_connect: classic connection or connect is already being created"); 4854 return GATT_CLIENT_IN_WRONG_STATE; 4855 } 4856 4857 // check if connection was just disconnected 4858 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4859 log_info("gap_connect: send create connection (again)"); 4860 conn->state = SEND_CREATE_CONNECTION; 4861 hci_run(); 4862 return ERROR_CODE_SUCCESS; 4863 } 4864 4865 log_info("gap_connect: context exists with state %u", conn->state); 4866 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4867 hci_run(); 4868 return ERROR_CODE_SUCCESS; 4869 } 4870 4871 // @assumption: only a single outgoing LE Connection exists 4872 static hci_connection_t * gap_get_outgoing_connection(void){ 4873 btstack_linked_item_t *it; 4874 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4875 hci_connection_t * conn = (hci_connection_t *) it; 4876 if (!hci_is_le_connection(conn)) continue; 4877 switch (conn->state){ 4878 case SEND_CREATE_CONNECTION: 4879 case SENT_CREATE_CONNECTION: 4880 case SENT_CANCEL_CONNECTION: 4881 return conn; 4882 default: 4883 break; 4884 }; 4885 } 4886 return NULL; 4887 } 4888 4889 uint8_t gap_connect_cancel(void){ 4890 hci_connection_t * conn = gap_get_outgoing_connection(); 4891 if (!conn) return 0; 4892 switch (conn->state){ 4893 case SEND_CREATE_CONNECTION: 4894 // skip sending create connection and emit event instead 4895 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4896 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4897 btstack_memory_hci_connection_free( conn ); 4898 break; 4899 case SENT_CREATE_CONNECTION: 4900 // request to send cancel connection 4901 conn->state = SEND_CANCEL_CONNECTION; 4902 hci_run(); 4903 break; 4904 default: 4905 break; 4906 } 4907 return 0; 4908 } 4909 #endif 4910 4911 #ifdef ENABLE_LE_CENTRAL 4912 /** 4913 * @brief Set connection parameters for outgoing connections 4914 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4915 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4916 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4917 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4918 * @param conn_latency, default: 4 4919 * @param supervision_timeout (unit: 10ms), default: 720 ms 4920 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4921 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4922 */ 4923 4924 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4925 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4926 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4927 hci_stack->le_connection_scan_interval = conn_scan_interval; 4928 hci_stack->le_connection_scan_window = conn_scan_window; 4929 hci_stack->le_connection_interval_min = conn_interval_min; 4930 hci_stack->le_connection_interval_max = conn_interval_max; 4931 hci_stack->le_connection_latency = conn_latency; 4932 hci_stack->le_supervision_timeout = supervision_timeout; 4933 hci_stack->le_minimum_ce_length = min_ce_length; 4934 hci_stack->le_maximum_ce_length = max_ce_length; 4935 } 4936 #endif 4937 4938 /** 4939 * @brief Updates the connection parameters for a given LE connection 4940 * @param handle 4941 * @param conn_interval_min (unit: 1.25ms) 4942 * @param conn_interval_max (unit: 1.25ms) 4943 * @param conn_latency 4944 * @param supervision_timeout (unit: 10ms) 4945 * @returns 0 if ok 4946 */ 4947 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4948 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4949 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4950 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4951 connection->le_conn_interval_min = conn_interval_min; 4952 connection->le_conn_interval_max = conn_interval_max; 4953 connection->le_conn_latency = conn_latency; 4954 connection->le_supervision_timeout = supervision_timeout; 4955 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4956 hci_run(); 4957 return 0; 4958 } 4959 4960 /** 4961 * @brief Request an update of the connection parameter for a given LE connection 4962 * @param handle 4963 * @param conn_interval_min (unit: 1.25ms) 4964 * @param conn_interval_max (unit: 1.25ms) 4965 * @param conn_latency 4966 * @param supervision_timeout (unit: 10ms) 4967 * @returns 0 if ok 4968 */ 4969 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4970 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4971 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4972 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4973 connection->le_conn_interval_min = conn_interval_min; 4974 connection->le_conn_interval_max = conn_interval_max; 4975 connection->le_conn_latency = conn_latency; 4976 connection->le_supervision_timeout = supervision_timeout; 4977 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4978 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 4979 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 4980 return 0; 4981 } 4982 4983 #ifdef ENABLE_LE_PERIPHERAL 4984 4985 static void gap_advertisments_changed(void){ 4986 // disable advertisements before updating adv, scan data, or adv params 4987 if (hci_stack->le_advertisements_active){ 4988 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4989 } 4990 hci_run(); 4991 } 4992 4993 /** 4994 * @brief Set Advertisement Data 4995 * @param advertising_data_length 4996 * @param advertising_data (max 31 octets) 4997 * @note data is not copied, pointer has to stay valid 4998 */ 4999 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5000 hci_stack->le_advertisements_data_len = advertising_data_length; 5001 hci_stack->le_advertisements_data = advertising_data; 5002 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5003 gap_advertisments_changed(); 5004 } 5005 5006 /** 5007 * @brief Set Scan Response Data 5008 * @param advertising_data_length 5009 * @param advertising_data (max 31 octets) 5010 * @note data is not copied, pointer has to stay valid 5011 */ 5012 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5013 hci_stack->le_scan_response_data_len = scan_response_data_length; 5014 hci_stack->le_scan_response_data = scan_response_data; 5015 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5016 gap_advertisments_changed(); 5017 } 5018 5019 /** 5020 * @brief Set Advertisement Parameters 5021 * @param adv_int_min 5022 * @param adv_int_max 5023 * @param adv_type 5024 * @param direct_address_type 5025 * @param direct_address 5026 * @param channel_map 5027 * @param filter_policy 5028 * 5029 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5030 */ 5031 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5032 uint8_t direct_address_typ, bd_addr_t direct_address, 5033 uint8_t channel_map, uint8_t filter_policy) { 5034 5035 hci_stack->le_advertisements_interval_min = adv_int_min; 5036 hci_stack->le_advertisements_interval_max = adv_int_max; 5037 hci_stack->le_advertisements_type = adv_type; 5038 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5039 hci_stack->le_advertisements_channel_map = channel_map; 5040 hci_stack->le_advertisements_filter_policy = filter_policy; 5041 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5042 6); 5043 5044 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5045 gap_advertisments_changed(); 5046 } 5047 5048 /** 5049 * @brief Enable/Disable Advertisements 5050 * @param enabled 5051 */ 5052 void gap_advertisements_enable(int enabled){ 5053 hci_stack->le_advertisements_enabled = enabled; 5054 if (enabled && !hci_stack->le_advertisements_active){ 5055 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 5056 } 5057 if (!enabled && hci_stack->le_advertisements_active){ 5058 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 5059 } 5060 hci_run(); 5061 } 5062 5063 #endif 5064 5065 void hci_le_set_own_address_type(uint8_t own_address_type){ 5066 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5067 if (own_address_type == hci_stack->le_own_addr_type) return; 5068 hci_stack->le_own_addr_type = own_address_type; 5069 5070 #ifdef ENABLE_LE_PERIPHERAL 5071 // update advertisement parameters, too 5072 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5073 gap_advertisments_changed(); 5074 #endif 5075 #ifdef ENABLE_LE_CENTRAL 5076 // note: we don't update scan parameters or modify ongoing connection attempts 5077 #endif 5078 } 5079 5080 #endif 5081 5082 uint8_t gap_disconnect(hci_con_handle_t handle){ 5083 hci_connection_t * conn = hci_connection_for_handle(handle); 5084 if (!conn){ 5085 hci_emit_disconnection_complete(handle, 0); 5086 return 0; 5087 } 5088 // ignore if already disconnected 5089 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5090 return 0; 5091 } 5092 conn->state = SEND_DISCONNECT; 5093 hci_run(); 5094 return 0; 5095 } 5096 5097 int gap_read_rssi(hci_con_handle_t con_handle){ 5098 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5099 if (hci_connection == NULL) return 0; 5100 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5101 hci_run(); 5102 return 1; 5103 } 5104 5105 /** 5106 * @brief Get connection type 5107 * @param con_handle 5108 * @result connection_type 5109 */ 5110 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5111 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5112 if (!conn) return GAP_CONNECTION_INVALID; 5113 switch (conn->address_type){ 5114 case BD_ADDR_TYPE_LE_PUBLIC: 5115 case BD_ADDR_TYPE_LE_RANDOM: 5116 return GAP_CONNECTION_LE; 5117 case BD_ADDR_TYPE_SCO: 5118 return GAP_CONNECTION_SCO; 5119 case BD_ADDR_TYPE_ACL: 5120 return GAP_CONNECTION_ACL; 5121 default: 5122 return GAP_CONNECTION_INVALID; 5123 } 5124 } 5125 5126 #ifdef ENABLE_BLE 5127 5128 uint8_t gap_le_set_phy(hci_con_handle_t connection_handle, uint8_t all_phys, uint8_t tx_phys, uint8_t rx_phys, uint8_t phy_options){ 5129 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5130 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5131 5132 conn->le_phy_update_all_phys = all_phys; 5133 conn->le_phy_update_tx_phys = tx_phys; 5134 conn->le_phy_update_rx_phys = rx_phys; 5135 conn->le_phy_update_phy_options = phy_options; 5136 5137 hci_run(); 5138 5139 return 0; 5140 } 5141 5142 #ifdef ENABLE_LE_CENTRAL 5143 /** 5144 * @brief Auto Connection Establishment - Start Connecting to device 5145 * @param address_typ 5146 * @param address 5147 * @returns 0 if ok 5148 */ 5149 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 5150 // check capacity 5151 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 5152 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 5153 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5154 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5155 entry->address_type = address_type; 5156 (void)memcpy(entry->address, address, 6); 5157 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5158 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5159 hci_run(); 5160 return 0; 5161 } 5162 5163 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 5164 btstack_linked_list_iterator_t it; 5165 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5166 while (btstack_linked_list_iterator_has_next(&it)){ 5167 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5168 if (entry->address_type != address_type) continue; 5169 if (memcmp(entry->address, address, 6) != 0) continue; 5170 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5171 // remove from controller if already present 5172 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5173 continue; 5174 } 5175 // direclty remove entry from whitelist 5176 btstack_linked_list_iterator_remove(&it); 5177 btstack_memory_whitelist_entry_free(entry); 5178 } 5179 } 5180 5181 /** 5182 * @brief Auto Connection Establishment - Stop Connecting to device 5183 * @param address_typ 5184 * @param address 5185 * @returns 0 if ok 5186 */ 5187 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 5188 hci_remove_from_whitelist(address_type, address); 5189 hci_run(); 5190 return 0; 5191 } 5192 5193 /** 5194 * @brief Auto Connection Establishment - Stop everything 5195 * @note Convenience function to stop all active auto connection attempts 5196 */ 5197 void gap_auto_connection_stop_all(void){ 5198 btstack_linked_list_iterator_t it; 5199 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5200 while (btstack_linked_list_iterator_has_next(&it)){ 5201 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5202 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5203 // remove from controller if already present 5204 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5205 continue; 5206 } 5207 // directly remove entry from whitelist 5208 btstack_linked_list_iterator_remove(&it); 5209 btstack_memory_whitelist_entry_free(entry); 5210 } 5211 hci_run(); 5212 } 5213 5214 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5215 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5216 if (!conn) return 0; 5217 return conn->le_connection_interval; 5218 } 5219 #endif 5220 #endif 5221 5222 #ifdef ENABLE_CLASSIC 5223 /** 5224 * @brief Set Extended Inquiry Response data 5225 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5226 * @note has to be done before stack starts up 5227 */ 5228 void gap_set_extended_inquiry_response(const uint8_t * data){ 5229 hci_stack->eir_data = data; 5230 } 5231 5232 /** 5233 * @brief Start GAP Classic Inquiry 5234 * @param duration in 1.28s units 5235 * @return 0 if ok 5236 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5237 */ 5238 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5239 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5240 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5241 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5242 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5243 } 5244 hci_stack->inquiry_state = duration_in_1280ms_units; 5245 hci_run(); 5246 return 0; 5247 } 5248 5249 /** 5250 * @brief Stop GAP Classic Inquiry 5251 * @returns 0 if ok 5252 */ 5253 int gap_inquiry_stop(void){ 5254 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5255 // emit inquiry complete event, before it even started 5256 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5257 hci_emit_event(event, sizeof(event), 1); 5258 return 0; 5259 } 5260 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5261 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5262 hci_run(); 5263 return 0; 5264 } 5265 5266 5267 /** 5268 * @brief Remote Name Request 5269 * @param addr 5270 * @param page_scan_repetition_mode 5271 * @param clock_offset only used when bit 15 is set 5272 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5273 */ 5274 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5275 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5276 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5277 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5278 hci_stack->remote_name_clock_offset = clock_offset; 5279 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5280 hci_run(); 5281 return 0; 5282 } 5283 5284 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 5285 hci_stack->gap_pairing_state = state; 5286 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5287 hci_run(); 5288 return 0; 5289 } 5290 5291 /** 5292 * @brief Legacy Pairing Pin Code Response 5293 * @param addr 5294 * @param pin 5295 * @return 0 if ok 5296 */ 5297 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 5298 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5299 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 5300 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5301 } 5302 5303 /** 5304 * @brief Abort Legacy Pairing 5305 * @param addr 5306 * @param pin 5307 * @return 0 if ok 5308 */ 5309 int gap_pin_code_negative(bd_addr_t addr){ 5310 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5311 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5312 } 5313 5314 /** 5315 * @brief SSP Passkey Response 5316 * @param addr 5317 * @param passkey 5318 * @return 0 if ok 5319 */ 5320 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5321 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5322 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5323 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5324 } 5325 5326 /** 5327 * @brief Abort SSP Passkey Entry/Pairing 5328 * @param addr 5329 * @param pin 5330 * @return 0 if ok 5331 */ 5332 int gap_ssp_passkey_negative(bd_addr_t addr){ 5333 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5334 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5335 } 5336 5337 /** 5338 * @brief Accept SSP Numeric Comparison 5339 * @param addr 5340 * @param passkey 5341 * @return 0 if ok 5342 */ 5343 int gap_ssp_confirmation_response(bd_addr_t addr){ 5344 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5345 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5346 } 5347 5348 /** 5349 * @brief Abort SSP Numeric Comparison/Pairing 5350 * @param addr 5351 * @param pin 5352 * @return 0 if ok 5353 */ 5354 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5355 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5356 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5357 } 5358 5359 /** 5360 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5361 * @param inquiry_mode see bluetooth_defines.h 5362 */ 5363 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5364 hci_stack->inquiry_mode = mode; 5365 } 5366 5367 /** 5368 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5369 */ 5370 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5371 hci_stack->sco_voice_setting = voice_setting; 5372 } 5373 5374 /** 5375 * @brief Get SCO Voice Setting 5376 * @return current voice setting 5377 */ 5378 uint16_t hci_get_sco_voice_setting(void){ 5379 return hci_stack->sco_voice_setting; 5380 } 5381 5382 static int hci_have_usb_transport(void){ 5383 if (!hci_stack->hci_transport) return 0; 5384 const char * transport_name = hci_stack->hci_transport->name; 5385 if (!transport_name) return 0; 5386 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5387 } 5388 5389 /** @brief Get SCO packet length for current SCO Voice setting 5390 * @note Using SCO packets of the exact length is required for USB transfer 5391 * @return Length of SCO packets in bytes (not audio frames) 5392 */ 5393 int hci_get_sco_packet_length(void){ 5394 int sco_packet_length = 0; 5395 5396 #ifdef ENABLE_SCO_OVER_HCI 5397 5398 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5399 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5400 5401 if (hci_have_usb_transport()){ 5402 // see Core Spec for H2 USB Transfer. 5403 // 3 byte SCO header + 24 bytes per connection 5404 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5405 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5406 } else { 5407 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5408 sco_packet_length = 3 + 60 * multiplier; 5409 // assert that it still fits inside an SCO buffer 5410 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5411 sco_packet_length = 3 + 60; 5412 } 5413 } 5414 #endif 5415 return sco_packet_length; 5416 } 5417 5418 /** 5419 * @brief Sets the master/slave policy 5420 * @param policy (0: attempt to become master, 1: let connecting device decide) 5421 */ 5422 void hci_set_master_slave_policy(uint8_t policy){ 5423 hci_stack->master_slave_policy = policy; 5424 } 5425 5426 #endif 5427 5428 HCI_STATE hci_get_state(void){ 5429 return hci_stack->state; 5430 } 5431 5432 #ifdef ENABLE_CLASSIC 5433 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5434 hci_stack->gap_classic_accept_callback = accept_callback; 5435 } 5436 #endif 5437 5438 /** 5439 * @brief Set callback for Bluetooth Hardware Error 5440 */ 5441 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5442 hci_stack->hardware_error_callback = fn; 5443 } 5444 5445 void hci_disconnect_all(void){ 5446 btstack_linked_list_iterator_t it; 5447 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5448 while (btstack_linked_list_iterator_has_next(&it)){ 5449 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5450 if (con->state == SENT_DISCONNECT) continue; 5451 con->state = SEND_DISCONNECT; 5452 } 5453 hci_run(); 5454 } 5455 5456 uint16_t hci_get_manufacturer(void){ 5457 return hci_stack->manufacturer; 5458 } 5459 5460 #ifdef ENABLE_BLE 5461 5462 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5463 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5464 if (!hci_con) return NULL; 5465 return &hci_con->sm_connection; 5466 } 5467 5468 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5469 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5470 5471 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5472 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5473 if (hci_connection == NULL) return 0; 5474 if (hci_is_le_connection(hci_connection)){ 5475 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5476 if (sm_conn->sm_connection_encrypted) { 5477 return sm_conn->sm_actual_encryption_key_size; 5478 } 5479 } 5480 #ifdef ENABLE_CLASSIC 5481 else { 5482 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5483 return hci_connection->encryption_key_size; 5484 } 5485 } 5486 #endif 5487 return 0; 5488 } 5489 5490 int gap_authenticated(hci_con_handle_t con_handle){ 5491 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5492 if (hci_connection == NULL) return 0; 5493 5494 switch (hci_connection->address_type){ 5495 case BD_ADDR_TYPE_LE_PUBLIC: 5496 case BD_ADDR_TYPE_LE_RANDOM: 5497 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5498 return hci_connection->sm_connection.sm_connection_authenticated; 5499 #ifdef ENABLE_CLASSIC 5500 case BD_ADDR_TYPE_SCO: 5501 case BD_ADDR_TYPE_ACL: 5502 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5503 #endif 5504 default: 5505 return 0; 5506 } 5507 } 5508 5509 int gap_secure_connection(hci_con_handle_t con_handle){ 5510 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5511 if (hci_connection == NULL) return 0; 5512 5513 switch (hci_connection->address_type){ 5514 case BD_ADDR_TYPE_LE_PUBLIC: 5515 case BD_ADDR_TYPE_LE_RANDOM: 5516 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5517 return hci_connection->sm_connection.sm_connection_sc; 5518 #ifdef ENABLE_CLASSIC 5519 case BD_ADDR_TYPE_SCO: 5520 case BD_ADDR_TYPE_ACL: 5521 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5522 #endif 5523 default: 5524 return 0; 5525 } 5526 } 5527 5528 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5529 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5530 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5531 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5532 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5533 return sm_conn->sm_connection_authorization_state; 5534 } 5535 #endif 5536 5537 #ifdef ENABLE_CLASSIC 5538 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){ 5539 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5540 if (!conn) return GAP_CONNECTION_INVALID; 5541 conn->sniff_min_interval = sniff_min_interval; 5542 conn->sniff_max_interval = sniff_max_interval; 5543 conn->sniff_attempt = sniff_attempt; 5544 conn->sniff_timeout = sniff_timeout; 5545 hci_run(); 5546 return 0; 5547 } 5548 5549 /** 5550 * @brief Exit Sniff mode 5551 * @param con_handle 5552 @ @return 0 if ok 5553 */ 5554 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5555 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5556 if (!conn) return GAP_CONNECTION_INVALID; 5557 conn->sniff_min_interval = 0xffff; 5558 hci_run(); 5559 return 0; 5560 } 5561 #endif 5562 5563 void hci_halting_defer(void){ 5564 if (hci_stack->state != HCI_STATE_HALTING) return; 5565 switch (hci_stack->substate){ 5566 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5567 case HCI_HALTING_CLOSE: 5568 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5569 break; 5570 default: 5571 break; 5572 } 5573 } 5574 5575 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 5576 void hci_setup_test_connections_fuzz(void){ 5577 hci_connection_t * conn; 5578 5579 // default address: 66:55:44:33:00:01 5580 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 5581 5582 // setup Controller info 5583 hci_stack->num_cmd_packets = 255; 5584 hci_stack->acl_packets_total_num = 255; 5585 5586 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 5587 addr[5] = 0x01; 5588 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5589 conn->con_handle = addr[5]; 5590 conn->role = HCI_ROLE_SLAVE; 5591 conn->state = RECEIVED_CONNECTION_REQUEST; 5592 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5593 5594 // setup incoming Classic SCO connection with con handle 0x0002 5595 addr[5] = 0x02; 5596 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5597 conn->con_handle = addr[5]; 5598 conn->role = HCI_ROLE_SLAVE; 5599 conn->state = RECEIVED_CONNECTION_REQUEST; 5600 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5601 5602 // setup ready Classic ACL connection with con handle 0x0003 5603 addr[5] = 0x03; 5604 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5605 conn->con_handle = addr[5]; 5606 conn->role = HCI_ROLE_SLAVE; 5607 conn->state = OPEN; 5608 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5609 5610 // setup ready Classic SCO connection with con handle 0x0004 5611 addr[5] = 0x04; 5612 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5613 conn->con_handle = addr[5]; 5614 conn->role = HCI_ROLE_SLAVE; 5615 conn->state = OPEN; 5616 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5617 5618 // setup ready LE ACL connection with con handle 0x005 and public address 5619 addr[5] = 0x05; 5620 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 5621 conn->con_handle = addr[5]; 5622 conn->role = HCI_ROLE_SLAVE; 5623 conn->state = OPEN; 5624 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5625 } 5626 5627 void hci_free_connections_fuzz(void){ 5628 btstack_linked_list_iterator_t it; 5629 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5630 while (btstack_linked_list_iterator_has_next(&it)){ 5631 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5632 btstack_linked_list_iterator_remove(&it); 5633 btstack_memory_hci_connection_free(con); 5634 } 5635 } 5636 void hci_simulate_working_fuzz(void){ 5637 hci_init_done(); 5638 hci_stack->num_cmd_packets = 255; 5639 } 5640 #endif 5641