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 <inttypes.h> 67 68 #include "btstack_debug.h" 69 #include "btstack_event.h" 70 #include "btstack_linked_list.h" 71 #include "btstack_memory.h" 72 #include "bluetooth_company_id.h" 73 #include "bluetooth_data_types.h" 74 #include "gap.h" 75 #include "hci.h" 76 #include "hci_cmd.h" 77 #include "hci_dump.h" 78 #include "ad_parser.h" 79 80 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 81 #ifndef HCI_HOST_ACL_PACKET_NUM 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 83 #endif 84 #ifndef HCI_HOST_ACL_PACKET_LEN 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_NUM 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 89 #endif 90 #ifndef HCI_HOST_SCO_PACKET_LEN 91 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 92 #endif 93 #endif 94 95 #define HCI_CONNECTION_TIMEOUT_MS 10000 96 97 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 98 #define HCI_RESET_RESEND_TIMEOUT_MS 200 99 #endif 100 101 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 102 #ifndef GAP_INQUIRY_MAX_NAME_LEN 103 #define GAP_INQUIRY_MAX_NAME_LEN 32 104 #endif 105 106 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 107 #define GAP_INQUIRY_DURATION_MIN 0x01 108 #define GAP_INQUIRY_DURATION_MAX 0x30 109 #define GAP_INQUIRY_STATE_ACTIVE 0x80 110 #define GAP_INQUIRY_STATE_IDLE 0 111 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 112 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 113 114 // GAP Remote Name Request 115 #define GAP_REMOTE_NAME_STATE_IDLE 0 116 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 117 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 118 119 // GAP Pairing 120 #define GAP_PAIRING_STATE_IDLE 0 121 #define GAP_PAIRING_STATE_SEND_PIN 1 122 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 123 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 124 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 125 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 126 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 127 128 129 // prototypes 130 #ifdef ENABLE_CLASSIC 131 static void hci_update_scan_enable(void); 132 static void hci_emit_discoverable_enabled(uint8_t enabled); 133 static int hci_local_ssp_activated(void); 134 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 135 static bool hci_ssp_supported(hci_connection_t * connection); 136 static void hci_notify_if_sco_can_send_now(void); 137 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 138 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 139 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 140 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 141 static void hci_connection_timestamp(hci_connection_t *connection); 142 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 143 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 144 #endif 145 146 static int hci_power_control_on(void); 147 static void hci_power_control_off(void); 148 static void hci_state_reset(void); 149 static void hci_emit_transport_packet_sent(void); 150 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 151 static void hci_emit_nr_connections_changed(void); 152 static void hci_emit_hci_open_failed(void); 153 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 154 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 155 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 156 static void hci_run(void); 157 static int hci_is_le_connection(hci_connection_t * connection); 158 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 159 160 #ifdef ENABLE_CLASSIC 161 static int hci_have_usb_transport(void); 162 #endif 163 164 #ifdef ENABLE_BLE 165 #ifdef ENABLE_LE_CENTRAL 166 // called from test/ble_client/advertising_data_parser.c 167 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 168 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 169 static hci_connection_t * gap_get_outgoing_connection(void); 170 #endif 171 #endif 172 173 // the STACK is here 174 #ifndef HAVE_MALLOC 175 static hci_stack_t hci_stack_static; 176 #endif 177 static hci_stack_t * hci_stack = NULL; 178 179 #ifdef ENABLE_CLASSIC 180 // default name 181 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 182 183 // test helper 184 static uint8_t disable_l2cap_timeouts = 0; 185 #endif 186 187 /** 188 * create connection for given address 189 * 190 * @return connection OR NULL, if no memory left 191 */ 192 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 193 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 194 hci_connection_t * conn = btstack_memory_hci_connection_get(); 195 if (!conn) return NULL; 196 bd_addr_copy(conn->address, addr); 197 conn->address_type = addr_type; 198 conn->con_handle = 0xffff; 199 conn->authentication_flags = AUTH_FLAGS_NONE; 200 conn->bonding_flags = 0; 201 conn->requested_security_level = LEVEL_0; 202 #ifdef ENABLE_CLASSIC 203 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 204 btstack_run_loop_set_timer_context(&conn->timeout, conn); 205 hci_connection_timestamp(conn); 206 #endif 207 conn->acl_recombination_length = 0; 208 conn->acl_recombination_pos = 0; 209 conn->num_packets_sent = 0; 210 211 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 212 #ifdef ENABLE_BLE 213 conn->le_phy_update_all_phys = 0xff; 214 #endif 215 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 216 conn->le_max_tx_octets = 27; 217 #endif 218 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 219 return conn; 220 } 221 222 223 /** 224 * get le connection parameter range 225 * 226 * @return le connection parameter range struct 227 */ 228 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 229 *range = hci_stack->le_connection_parameter_range; 230 } 231 232 /** 233 * set le connection parameter range 234 * 235 */ 236 237 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 238 hci_stack->le_connection_parameter_range = *range; 239 } 240 241 /** 242 * @brief Test if connection parameters are inside in existing rage 243 * @param conn_interval_min (unit: 1.25ms) 244 * @param conn_interval_max (unit: 1.25ms) 245 * @param conn_latency 246 * @param supervision_timeout (unit: 10ms) 247 * @returns 1 if included 248 */ 249 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){ 250 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 251 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 252 253 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 254 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 255 256 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 257 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 258 259 return 1; 260 } 261 262 /** 263 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 264 * @note: default: 1 265 * @param max_peripheral_connections 266 */ 267 #ifdef ENABLE_LE_PERIPHERAL 268 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 269 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 270 } 271 #endif 272 273 /** 274 * get hci connections iterator 275 * 276 * @return hci connections iterator 277 */ 278 279 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 280 btstack_linked_list_iterator_init(it, &hci_stack->connections); 281 } 282 283 /** 284 * get connection for a given handle 285 * 286 * @return connection OR NULL, if not found 287 */ 288 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 289 btstack_linked_list_iterator_t it; 290 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 291 while (btstack_linked_list_iterator_has_next(&it)){ 292 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 293 if ( item->con_handle == con_handle ) { 294 return item; 295 } 296 } 297 return NULL; 298 } 299 300 /** 301 * get connection for given address 302 * 303 * @return connection OR NULL, if not found 304 */ 305 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 306 btstack_linked_list_iterator_t it; 307 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 308 while (btstack_linked_list_iterator_has_next(&it)){ 309 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 310 if (connection->address_type != addr_type) continue; 311 if (memcmp(addr, connection->address, 6) != 0) continue; 312 return connection; 313 } 314 return NULL; 315 } 316 317 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 318 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 319 } 320 321 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 322 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 323 } 324 325 #ifdef ENABLE_CLASSIC 326 327 #ifdef ENABLE_SCO_OVER_HCI 328 static int hci_number_sco_connections(void){ 329 int connections = 0; 330 btstack_linked_list_iterator_t it; 331 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 332 while (btstack_linked_list_iterator_has_next(&it)){ 333 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 334 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 335 connections++; 336 } 337 return connections; 338 } 339 #endif 340 341 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 342 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 343 #ifdef HAVE_EMBEDDED_TICK 344 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 345 // connections might be timed out 346 hci_emit_l2cap_check_timeout(connection); 347 } 348 #else 349 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 350 // connections might be timed out 351 hci_emit_l2cap_check_timeout(connection); 352 } 353 #endif 354 } 355 356 static void hci_connection_timestamp(hci_connection_t *connection){ 357 #ifdef HAVE_EMBEDDED_TICK 358 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 359 #else 360 connection->timestamp = btstack_run_loop_get_time_ms(); 361 #endif 362 } 363 364 /** 365 * add authentication flags and reset timer 366 * @note: assumes classic connection 367 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 368 */ 369 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 370 bd_addr_t addr; 371 reverse_bd_addr(bd_addr, addr); 372 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 373 if (conn) { 374 connectionSetAuthenticationFlags(conn, flags); 375 hci_connection_timestamp(conn); 376 } 377 } 378 379 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 380 hci_connection_t * conn = hci_connection_for_handle(handle); 381 if (!conn) return 0; 382 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 383 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 384 return 0; 385 } 386 387 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 388 if (!hci_stack->link_key_db) return; 389 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 390 hci_stack->link_key_db->delete_link_key(addr); 391 } 392 393 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 394 if (!hci_stack->link_key_db) return; 395 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 396 hci_stack->link_key_db->put_link_key(addr, link_key, type); 397 } 398 399 void gap_delete_all_link_keys(void){ 400 bd_addr_t addr; 401 link_key_t link_key; 402 link_key_type_t type; 403 btstack_link_key_iterator_t it; 404 int ok = gap_link_key_iterator_init(&it); 405 if (!ok) { 406 log_error("could not initialize iterator"); 407 return; 408 } 409 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 410 gap_drop_link_key_for_bd_addr(addr); 411 } 412 gap_link_key_iterator_done(&it); 413 } 414 415 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 416 if (!hci_stack->link_key_db) return 0; 417 if (!hci_stack->link_key_db->iterator_init) return 0; 418 return hci_stack->link_key_db->iterator_init(it); 419 } 420 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){ 421 if (!hci_stack->link_key_db) return 0; 422 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 423 } 424 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 425 if (!hci_stack->link_key_db) return; 426 hci_stack->link_key_db->iterator_done(it); 427 } 428 #endif 429 430 static int hci_is_le_connection(hci_connection_t * connection){ 431 switch (connection->address_type){ 432 case BD_ADDR_TYPE_LE_PUBLIC: 433 case BD_ADDR_TYPE_LE_RANDOM: 434 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 435 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 436 return 1; 437 default: 438 return 0; 439 } 440 } 441 442 /** 443 * count connections 444 */ 445 static int nr_hci_connections(void){ 446 int count = 0; 447 btstack_linked_item_t *it; 448 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 449 count++; 450 } 451 return count; 452 } 453 454 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 455 456 unsigned int num_packets_sent_classic = 0; 457 unsigned int num_packets_sent_le = 0; 458 459 btstack_linked_item_t *it; 460 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 461 hci_connection_t * connection = (hci_connection_t *) it; 462 if (hci_is_le_connection(connection)){ 463 num_packets_sent_le += connection->num_packets_sent; 464 } 465 if (connection->address_type == BD_ADDR_TYPE_ACL){ 466 num_packets_sent_classic += connection->num_packets_sent; 467 } 468 } 469 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 470 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 471 int free_slots_le = 0; 472 473 if (free_slots_classic < 0){ 474 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); 475 return 0; 476 } 477 478 if (hci_stack->le_acl_packets_total_num){ 479 // if we have LE slots, they are used 480 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 481 if (free_slots_le < 0){ 482 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); 483 return 0; 484 } 485 } else { 486 // otherwise, classic slots are used for LE, too 487 free_slots_classic -= num_packets_sent_le; 488 if (free_slots_classic < 0){ 489 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); 490 return 0; 491 } 492 } 493 494 switch (address_type){ 495 case BD_ADDR_TYPE_UNKNOWN: 496 log_error("hci_number_free_acl_slots: unknown address type"); 497 return 0; 498 499 case BD_ADDR_TYPE_ACL: 500 return free_slots_classic; 501 502 default: 503 if (hci_stack->le_acl_packets_total_num){ 504 return free_slots_le; 505 } 506 return free_slots_classic; 507 } 508 } 509 510 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 511 // get connection type 512 hci_connection_t * connection = hci_connection_for_handle(con_handle); 513 if (!connection){ 514 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 515 return 0; 516 } 517 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 518 } 519 520 #ifdef ENABLE_CLASSIC 521 static int hci_number_free_sco_slots(void){ 522 unsigned int num_sco_packets_sent = 0; 523 btstack_linked_item_t *it; 524 if (hci_stack->synchronous_flow_control_enabled){ 525 // explicit flow control 526 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 527 hci_connection_t * connection = (hci_connection_t *) it; 528 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 529 num_sco_packets_sent += connection->num_packets_sent; 530 } 531 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 532 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 533 return 0; 534 } 535 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 536 } else { 537 // implicit flow control -- TODO 538 int num_ready = 0; 539 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 540 hci_connection_t * connection = (hci_connection_t *) it; 541 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 542 if (connection->sco_tx_ready == 0) continue; 543 num_ready++; 544 } 545 return num_ready; 546 } 547 } 548 #endif 549 550 // only used to send HCI Host Number Completed Packets 551 static int hci_can_send_comand_packet_transport(void){ 552 if (hci_stack->hci_packet_buffer_reserved) return 0; 553 554 // check for async hci transport implementations 555 if (hci_stack->hci_transport->can_send_packet_now){ 556 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 557 return 0; 558 } 559 } 560 return 1; 561 } 562 563 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 564 int hci_can_send_command_packet_now(void){ 565 if (hci_can_send_comand_packet_transport() == 0) return 0; 566 return hci_stack->num_cmd_packets > 0; 567 } 568 569 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 570 // check for async hci transport implementations 571 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 572 return hci_stack->hci_transport->can_send_packet_now(packet_type); 573 } 574 575 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 576 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 577 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 578 } 579 580 int hci_can_send_acl_le_packet_now(void){ 581 if (hci_stack->hci_packet_buffer_reserved) return 0; 582 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 583 } 584 585 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 586 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 587 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 588 } 589 590 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 591 if (hci_stack->hci_packet_buffer_reserved) return 0; 592 return hci_can_send_prepared_acl_packet_now(con_handle); 593 } 594 595 #ifdef ENABLE_CLASSIC 596 int hci_can_send_acl_classic_packet_now(void){ 597 if (hci_stack->hci_packet_buffer_reserved) return 0; 598 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 599 } 600 601 int hci_can_send_prepared_sco_packet_now(void){ 602 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 603 if (hci_have_usb_transport()){ 604 return hci_stack->sco_can_send_now; 605 } else { 606 return hci_number_free_sco_slots() > 0; 607 } 608 } 609 610 int hci_can_send_sco_packet_now(void){ 611 if (hci_stack->hci_packet_buffer_reserved) return 0; 612 return hci_can_send_prepared_sco_packet_now(); 613 } 614 615 void hci_request_sco_can_send_now_event(void){ 616 hci_stack->sco_waiting_for_can_send_now = 1; 617 hci_notify_if_sco_can_send_now(); 618 } 619 #endif 620 621 // used for internal checks in l2cap.c 622 int hci_is_packet_buffer_reserved(void){ 623 return hci_stack->hci_packet_buffer_reserved; 624 } 625 626 // reserves outgoing packet buffer. @returns 1 if successful 627 int hci_reserve_packet_buffer(void){ 628 if (hci_stack->hci_packet_buffer_reserved) { 629 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 630 return 0; 631 } 632 hci_stack->hci_packet_buffer_reserved = 1; 633 return 1; 634 } 635 636 void hci_release_packet_buffer(void){ 637 hci_stack->hci_packet_buffer_reserved = 0; 638 } 639 640 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 641 static int hci_transport_synchronous(void){ 642 return hci_stack->hci_transport->can_send_packet_now == NULL; 643 } 644 645 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 646 647 // 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); 648 649 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 650 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 651 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0)){ 652 max_acl_data_packet_length = hci_stack->le_data_packets_length; 653 } 654 655 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 656 if (hci_is_le_connection(connection)){ 657 max_acl_data_packet_length = connection->le_max_tx_octets; 658 } 659 #endif 660 661 log_debug("hci_send_acl_packet_fragments entered"); 662 663 int err; 664 // multiple packets could be send on a synchronous HCI transport 665 while (true){ 666 667 log_debug("hci_send_acl_packet_fragments loop entered"); 668 669 // get current data 670 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 671 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 672 int more_fragments = 0; 673 674 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 675 if (current_acl_data_packet_length > max_acl_data_packet_length){ 676 more_fragments = 1; 677 current_acl_data_packet_length = max_acl_data_packet_length; 678 } 679 680 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 681 if (acl_header_pos > 0){ 682 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 683 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 684 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 685 } 686 687 // update header len 688 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 689 690 // count packet 691 connection->num_packets_sent++; 692 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 693 694 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 695 if (more_fragments){ 696 // update start of next fragment to send 697 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 698 } else { 699 // done 700 hci_stack->acl_fragmentation_pos = 0; 701 hci_stack->acl_fragmentation_total_size = 0; 702 } 703 704 // send packet 705 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 706 const int size = current_acl_data_packet_length + 4; 707 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 708 hci_stack->acl_fragmentation_tx_active = 1; 709 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 710 711 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 712 713 // done yet? 714 if (!more_fragments) break; 715 716 // can send more? 717 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 718 } 719 720 log_debug("hci_send_acl_packet_fragments loop over"); 721 722 // release buffer now for synchronous transport 723 if (hci_transport_synchronous()){ 724 hci_stack->acl_fragmentation_tx_active = 0; 725 hci_release_packet_buffer(); 726 hci_emit_transport_packet_sent(); 727 } 728 729 return err; 730 } 731 732 // pre: caller has reserved the packet buffer 733 int hci_send_acl_packet_buffer(int size){ 734 735 // log_info("hci_send_acl_packet_buffer size %u", size); 736 737 if (!hci_stack->hci_packet_buffer_reserved) { 738 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 739 return 0; 740 } 741 742 uint8_t * packet = hci_stack->hci_packet_buffer; 743 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 744 745 // check for free places on Bluetooth module 746 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 747 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 748 hci_release_packet_buffer(); 749 hci_emit_transport_packet_sent(); 750 return BTSTACK_ACL_BUFFERS_FULL; 751 } 752 753 hci_connection_t *connection = hci_connection_for_handle( con_handle); 754 if (!connection) { 755 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 756 hci_release_packet_buffer(); 757 hci_emit_transport_packet_sent(); 758 return 0; 759 } 760 761 #ifdef ENABLE_CLASSIC 762 hci_connection_timestamp(connection); 763 #endif 764 765 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 766 767 // setup data 768 hci_stack->acl_fragmentation_total_size = size; 769 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 770 771 return hci_send_acl_packet_fragments(connection); 772 } 773 774 #ifdef ENABLE_CLASSIC 775 // pre: caller has reserved the packet buffer 776 int hci_send_sco_packet_buffer(int size){ 777 778 // log_info("hci_send_acl_packet_buffer size %u", size); 779 780 if (!hci_stack->hci_packet_buffer_reserved) { 781 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 782 return 0; 783 } 784 785 uint8_t * packet = hci_stack->hci_packet_buffer; 786 787 // skip checks in loopback mode 788 if (!hci_stack->loopback_mode){ 789 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 790 791 // check for free places on Bluetooth module 792 if (!hci_can_send_prepared_sco_packet_now()) { 793 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 794 hci_release_packet_buffer(); 795 hci_emit_transport_packet_sent(); 796 return BTSTACK_ACL_BUFFERS_FULL; 797 } 798 799 // track send packet in connection struct 800 hci_connection_t *connection = hci_connection_for_handle( con_handle); 801 if (!connection) { 802 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 803 hci_release_packet_buffer(); 804 hci_emit_transport_packet_sent(); 805 return 0; 806 } 807 808 if (hci_have_usb_transport()){ 809 // token used 810 hci_stack->sco_can_send_now = 0; 811 } else { 812 if (hci_stack->synchronous_flow_control_enabled){ 813 connection->num_packets_sent++; 814 } else { 815 connection->sco_tx_ready--; 816 } 817 } 818 } 819 820 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 821 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 822 823 if (hci_transport_synchronous()){ 824 hci_release_packet_buffer(); 825 hci_emit_transport_packet_sent(); 826 } 827 828 return err; 829 } 830 #endif 831 832 static void acl_handler(uint8_t *packet, int size){ 833 834 // log_info("acl_handler: size %u", size); 835 836 // get info 837 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 838 hci_connection_t *conn = hci_connection_for_handle(con_handle); 839 uint8_t acl_flags = READ_ACL_FLAGS(packet); 840 uint16_t acl_length = READ_ACL_LENGTH(packet); 841 842 // ignore non-registered handle 843 if (!conn){ 844 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 845 return; 846 } 847 848 // assert packet is complete 849 if ((acl_length + 4) != size){ 850 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 851 return; 852 } 853 854 #ifdef ENABLE_CLASSIC 855 // update idle timestamp 856 hci_connection_timestamp(conn); 857 #endif 858 859 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 860 hci_stack->host_completed_packets = 1; 861 conn->num_packets_completed++; 862 #endif 863 864 // handle different packet types 865 switch (acl_flags & 0x03) { 866 867 case 0x01: // continuation fragment 868 869 // sanity checks 870 if (conn->acl_recombination_pos == 0) { 871 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 872 return; 873 } 874 if ((conn->acl_recombination_pos + acl_length) > (4 + HCI_ACL_BUFFER_SIZE)){ 875 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 876 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 877 conn->acl_recombination_pos = 0; 878 return; 879 } 880 881 // append fragment payload (header already stored) 882 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 883 &packet[4], acl_length); 884 conn->acl_recombination_pos += acl_length; 885 886 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 887 // conn->acl_recombination_pos, conn->acl_recombination_length); 888 889 // forward complete L2CAP packet if complete. 890 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4 + 4)){ // pos already incl. ACL header 891 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 892 // reset recombination buffer 893 conn->acl_recombination_length = 0; 894 conn->acl_recombination_pos = 0; 895 } 896 break; 897 898 case 0x02: { // first fragment 899 900 // sanity check 901 if (conn->acl_recombination_pos) { 902 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 903 conn->acl_recombination_pos = 0; 904 } 905 906 // peek into L2CAP packet! 907 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 908 909 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 910 911 // compare fragment size to L2CAP packet size 912 if (acl_length >= (l2cap_length + 4)){ 913 // forward fragment as L2CAP packet 914 hci_emit_acl_packet(packet, acl_length + 4); 915 } else { 916 917 if (acl_length > HCI_ACL_BUFFER_SIZE){ 918 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 919 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 920 return; 921 } 922 923 // store first fragment and tweak acl length for complete package 924 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 925 packet, acl_length + 4); 926 conn->acl_recombination_pos = acl_length + 4; 927 conn->acl_recombination_length = l2cap_length; 928 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 929 } 930 break; 931 932 } 933 default: 934 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 935 return; 936 } 937 938 // execute main loop 939 hci_run(); 940 } 941 942 static void hci_shutdown_connection(hci_connection_t *conn){ 943 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 944 945 #ifdef ENABLE_CLASSIC 946 #ifdef ENABLE_SCO_OVER_HCI 947 int addr_type = conn->address_type; 948 #endif 949 #endif 950 951 btstack_run_loop_remove_timer(&conn->timeout); 952 953 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 954 btstack_memory_hci_connection_free( conn ); 955 956 // now it's gone 957 hci_emit_nr_connections_changed(); 958 959 #ifdef ENABLE_CLASSIC 960 #ifdef ENABLE_SCO_OVER_HCI 961 // update SCO 962 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 963 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 964 } 965 #endif 966 #endif 967 } 968 969 #ifdef ENABLE_CLASSIC 970 971 static const uint16_t packet_type_sizes[] = { 972 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 973 HCI_ACL_DH1_SIZE, 0, 0, 0, 974 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 975 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 976 }; 977 static const uint8_t packet_type_feature_requirement_bit[] = { 978 0, // 3 slot packets 979 1, // 5 slot packets 980 25, // EDR 2 mpbs 981 26, // EDR 3 mbps 982 39, // 3 slot EDR packts 983 40, // 5 slot EDR packet 984 }; 985 static const uint16_t packet_type_feature_packet_mask[] = { 986 0x0f00, // 3 slot packets 987 0xf000, // 5 slot packets 988 0x1102, // EDR 2 mpbs 989 0x2204, // EDR 3 mbps 990 0x0300, // 3 slot EDR packts 991 0x3000, // 5 slot EDR packet 992 }; 993 994 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 995 // enable packet types based on size 996 uint16_t packet_types = 0; 997 unsigned int i; 998 for (i=0;i<16;i++){ 999 if (packet_type_sizes[i] == 0) continue; 1000 if (packet_type_sizes[i] <= buffer_size){ 1001 packet_types |= 1 << i; 1002 } 1003 } 1004 // disable packet types due to missing local supported features 1005 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1006 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1007 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1008 if (feature_set) continue; 1009 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1010 packet_types &= ~packet_type_feature_packet_mask[i]; 1011 } 1012 // flip bits for "may not be used" 1013 packet_types ^= 0x3306; 1014 return packet_types; 1015 } 1016 1017 uint16_t hci_usable_acl_packet_types(void){ 1018 return hci_stack->packet_types; 1019 } 1020 #endif 1021 1022 uint8_t* hci_get_outgoing_packet_buffer(void){ 1023 // hci packet buffer is >= acl data packet length 1024 return hci_stack->hci_packet_buffer; 1025 } 1026 1027 uint16_t hci_max_acl_data_packet_length(void){ 1028 return hci_stack->acl_data_packet_length; 1029 } 1030 1031 #ifdef ENABLE_CLASSIC 1032 int hci_extended_sco_link_supported(void){ 1033 // No. 31, byte 3, bit 7 1034 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1035 } 1036 #endif 1037 1038 int hci_non_flushable_packet_boundary_flag_supported(void){ 1039 // No. 54, byte 6, bit 6 1040 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 1041 } 1042 1043 static int gap_ssp_supported(void){ 1044 // No. 51, byte 6, bit 3 1045 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 1046 } 1047 1048 static int hci_classic_supported(void){ 1049 #ifdef ENABLE_CLASSIC 1050 // No. 37, byte 4, bit 5, = No BR/EDR Support 1051 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1052 #else 1053 return 0; 1054 #endif 1055 } 1056 1057 static int hci_le_supported(void){ 1058 #ifdef ENABLE_BLE 1059 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1060 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1061 #else 1062 return 0; 1063 #endif 1064 } 1065 1066 #ifdef ENABLE_BLE 1067 1068 /** 1069 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1070 */ 1071 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1072 *addr_type = hci_stack->le_own_addr_type; 1073 if (hci_stack->le_own_addr_type){ 1074 (void)memcpy(addr, hci_stack->le_random_address, 6); 1075 } else { 1076 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1077 } 1078 } 1079 1080 #ifdef ENABLE_LE_CENTRAL 1081 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1082 1083 int offset = 3; 1084 int num_reports = packet[offset]; 1085 offset += 1; 1086 1087 int i; 1088 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1089 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1090 for (i=0; (i<num_reports) && (offset < size);i++){ 1091 // sanity checks on data_length: 1092 uint8_t data_length = packet[offset + 8]; 1093 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1094 if ((offset + 9 + data_length + 1) > size) return; 1095 // setup event 1096 uint8_t event_size = 10 + data_length; 1097 int pos = 0; 1098 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1099 event[pos++] = event_size; 1100 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1101 offset += 8; 1102 pos += 8; 1103 event[pos++] = packet[offset + 1 + data_length]; // rssi 1104 event[pos++] = data_length; 1105 offset++; 1106 (void)memcpy(&event[pos], &packet[offset], data_length); 1107 pos += data_length; 1108 offset += data_length + 1; // rssi 1109 hci_emit_event(event, pos, 1); 1110 } 1111 } 1112 #endif 1113 #endif 1114 1115 #ifdef ENABLE_BLE 1116 #ifdef ENABLE_LE_PERIPHERAL 1117 static void hci_reenable_advertisements_if_needed(void){ 1118 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1119 // get number of active le slave connections 1120 int num_slave_connections = 0; 1121 btstack_linked_list_iterator_t it; 1122 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1123 while (btstack_linked_list_iterator_has_next(&it)){ 1124 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1125 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1126 if (con->state != OPEN) continue; 1127 if (con->role != HCI_ROLE_SLAVE) continue; 1128 if (!hci_is_le_connection(con)) continue; 1129 num_slave_connections++; 1130 } 1131 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1132 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1133 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1134 } 1135 } 1136 } 1137 #endif 1138 #endif 1139 1140 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1141 1142 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1143 if (!hci_stack->config) return 0; 1144 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1145 // Limit baud rate for Broadcom chipsets to 3 mbps 1146 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1147 baud_rate = 3000000; 1148 } 1149 return baud_rate; 1150 } 1151 1152 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1153 UNUSED(ds); 1154 1155 switch (hci_stack->substate){ 1156 case HCI_INIT_W4_SEND_RESET: 1157 log_info("Resend HCI Reset"); 1158 hci_stack->substate = HCI_INIT_SEND_RESET; 1159 hci_stack->num_cmd_packets = 1; 1160 hci_run(); 1161 break; 1162 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1163 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1164 if (hci_stack->hci_transport->reset_link){ 1165 hci_stack->hci_transport->reset_link(); 1166 } 1167 1168 /* fall through */ 1169 1170 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1171 log_info("Resend HCI Reset - CSR Warm Boot"); 1172 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1173 hci_stack->num_cmd_packets = 1; 1174 hci_run(); 1175 break; 1176 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1177 if (hci_stack->hci_transport->set_baudrate){ 1178 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1179 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1180 hci_stack->hci_transport->set_baudrate(baud_rate); 1181 } 1182 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1183 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1184 if (hci_stack->hci_transport->reset_link){ 1185 log_info("Link Reset"); 1186 hci_stack->hci_transport->reset_link(); 1187 } 1188 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1189 hci_run(); 1190 } 1191 break; 1192 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1193 // otherwise continue 1194 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1195 hci_send_cmd(&hci_read_local_supported_commands); 1196 break; 1197 default: 1198 break; 1199 } 1200 } 1201 #endif 1202 1203 static void hci_initializing_next_state(void){ 1204 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1205 } 1206 1207 // assumption: hci_can_send_command_packet_now() == true 1208 static void hci_initializing_run(void){ 1209 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1210 switch (hci_stack->substate){ 1211 case HCI_INIT_SEND_RESET: 1212 hci_state_reset(); 1213 1214 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1215 // prepare reset if command complete not received in 100ms 1216 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1217 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1218 btstack_run_loop_add_timer(&hci_stack->timeout); 1219 #endif 1220 // send command 1221 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1222 hci_send_cmd(&hci_reset); 1223 break; 1224 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1225 hci_send_cmd(&hci_read_local_version_information); 1226 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1227 break; 1228 case HCI_INIT_SEND_READ_LOCAL_NAME: 1229 hci_send_cmd(&hci_read_local_name); 1230 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1231 break; 1232 1233 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1234 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1235 hci_state_reset(); 1236 // prepare reset if command complete not received in 100ms 1237 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1238 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1239 btstack_run_loop_add_timer(&hci_stack->timeout); 1240 // send command 1241 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1242 hci_send_cmd(&hci_reset); 1243 break; 1244 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1245 hci_state_reset(); 1246 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1247 hci_send_cmd(&hci_reset); 1248 break; 1249 case HCI_INIT_SEND_BAUD_CHANGE: { 1250 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1251 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1252 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1253 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1254 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1255 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1256 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1257 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1258 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1259 btstack_run_loop_add_timer(&hci_stack->timeout); 1260 } 1261 break; 1262 } 1263 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1264 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1265 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1266 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1267 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1268 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1269 break; 1270 } 1271 case HCI_INIT_CUSTOM_INIT: 1272 // Custom initialization 1273 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1274 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1275 int send_cmd = 0; 1276 switch (hci_stack->chipset_result){ 1277 case BTSTACK_CHIPSET_VALID_COMMAND: 1278 send_cmd = 1; 1279 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1280 break; 1281 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1282 send_cmd = 1; 1283 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1284 log_info("CSR Warm Boot"); 1285 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1286 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1287 btstack_run_loop_add_timer(&hci_stack->timeout); 1288 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1289 && hci_stack->config 1290 && hci_stack->chipset 1291 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1292 && hci_stack->hci_transport->set_baudrate 1293 && hci_transport_uart_get_main_baud_rate()){ 1294 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1295 } else { 1296 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1297 } 1298 break; 1299 default: 1300 break; 1301 } 1302 1303 if (send_cmd){ 1304 int size = 3 + hci_stack->hci_packet_buffer[2]; 1305 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1306 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1307 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1308 break; 1309 } 1310 log_info("Init script done"); 1311 1312 // Init script download on Broadcom chipsets causes: 1313 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1314 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1315 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1316 1317 // - baud rate to reset, restore UART baud rate if needed 1318 int need_baud_change = hci_stack->config 1319 && hci_stack->chipset 1320 && hci_stack->chipset->set_baudrate_command 1321 && hci_stack->hci_transport->set_baudrate 1322 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1323 if (need_baud_change) { 1324 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1325 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1326 hci_stack->hci_transport->set_baudrate(baud_rate); 1327 } 1328 1329 uint16_t bcm_delay_ms = 300; 1330 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1331 // -> Work around: wait here. 1332 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1333 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1334 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1335 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1336 btstack_run_loop_add_timer(&hci_stack->timeout); 1337 break; 1338 } 1339 } 1340 // otherwise continue 1341 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1342 hci_send_cmd(&hci_read_local_supported_commands); 1343 break; 1344 case HCI_INIT_SET_BD_ADDR: 1345 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1346 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1347 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1348 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1349 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1350 break; 1351 #endif 1352 1353 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1354 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1355 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1356 hci_send_cmd(&hci_read_local_supported_commands); 1357 break; 1358 case HCI_INIT_READ_BD_ADDR: 1359 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1360 hci_send_cmd(&hci_read_bd_addr); 1361 break; 1362 case HCI_INIT_READ_BUFFER_SIZE: 1363 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1364 hci_send_cmd(&hci_read_buffer_size); 1365 break; 1366 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1367 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1368 hci_send_cmd(&hci_read_local_supported_features); 1369 break; 1370 1371 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1372 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1373 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1374 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1375 break; 1376 case HCI_INIT_HOST_BUFFER_SIZE: 1377 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1378 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1379 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1380 break; 1381 #endif 1382 1383 case HCI_INIT_SET_EVENT_MASK: 1384 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1385 if (hci_le_supported()){ 1386 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1387 } else { 1388 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1389 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1390 } 1391 break; 1392 1393 #ifdef ENABLE_CLASSIC 1394 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1395 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1396 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1397 break; 1398 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1399 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1400 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1401 break; 1402 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1403 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1404 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1405 break; 1406 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1407 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1408 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1409 break; 1410 case HCI_INIT_WRITE_LOCAL_NAME: { 1411 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1412 hci_reserve_packet_buffer(); 1413 uint8_t * packet = hci_stack->hci_packet_buffer; 1414 // construct HCI Command and send 1415 uint16_t opcode = hci_write_local_name.opcode; 1416 hci_stack->last_cmd_opcode = opcode; 1417 packet[0] = opcode & 0xff; 1418 packet[1] = opcode >> 8; 1419 packet[2] = DEVICE_NAME_LEN; 1420 memset(&packet[3], 0, DEVICE_NAME_LEN); 1421 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1422 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1423 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1424 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1425 // expand '00:00:00:00:00:00' in name with bd_addr 1426 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1427 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1428 break; 1429 } 1430 case HCI_INIT_WRITE_EIR_DATA: { 1431 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1432 hci_reserve_packet_buffer(); 1433 uint8_t * packet = hci_stack->hci_packet_buffer; 1434 // construct HCI Command in-place and send 1435 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1436 hci_stack->last_cmd_opcode = opcode; 1437 uint16_t offset = 0; 1438 packet[offset++] = opcode & 0xff; 1439 packet[offset++] = opcode >> 8; 1440 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1441 packet[offset++] = 0; // FEC not required 1442 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1443 if (hci_stack->eir_data){ 1444 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1445 ad_context_t context; 1446 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1447 uint8_t data_type = ad_iterator_get_data_type(&context); 1448 uint8_t size = ad_iterator_get_data_len(&context); 1449 const uint8_t *data = ad_iterator_get_data(&context); 1450 // copy item 1451 packet[offset++] = size + 1; 1452 packet[offset++] = data_type; 1453 memcpy(&packet[offset], data, size); 1454 // update name item 1455 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1456 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1457 } 1458 offset += size; 1459 } 1460 } else { 1461 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1462 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1463 packet[offset++] = bytes_to_copy + 1; 1464 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1465 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1466 // expand '00:00:00:00:00:00' in name with bd_addr 1467 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1468 } 1469 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1470 break; 1471 } 1472 case HCI_INIT_WRITE_INQUIRY_MODE: 1473 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1474 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1475 break; 1476 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1477 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1478 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1479 break; 1480 case HCI_INIT_WRITE_SCAN_ENABLE: 1481 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1482 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1483 break; 1484 // only sent if ENABLE_SCO_OVER_HCI is defined 1485 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1486 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1487 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1488 break; 1489 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1490 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1491 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1492 break; 1493 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1494 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1495 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1496 log_info("BCM: Route SCO data via HCI transport"); 1497 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1498 break; 1499 1500 #endif 1501 #ifdef ENABLE_BLE 1502 // LE INIT 1503 case HCI_INIT_LE_READ_BUFFER_SIZE: 1504 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1505 hci_send_cmd(&hci_le_read_buffer_size); 1506 break; 1507 case HCI_INIT_LE_SET_EVENT_MASK: 1508 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1509 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1510 break; 1511 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1512 // LE Supported Host = 1, Simultaneous Host = 0 1513 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1514 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1515 break; 1516 #endif 1517 1518 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1519 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1520 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1521 hci_send_cmd(&hci_le_read_maximum_data_length); 1522 break; 1523 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1524 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1525 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1526 break; 1527 #endif 1528 1529 #ifdef ENABLE_LE_CENTRAL 1530 case HCI_INIT_READ_WHITE_LIST_SIZE: 1531 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1532 hci_send_cmd(&hci_le_read_white_list_size); 1533 break; 1534 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1535 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1536 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1537 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); 1538 break; 1539 #endif 1540 default: 1541 return; 1542 } 1543 } 1544 1545 static void hci_init_done(void){ 1546 // done. tell the app 1547 log_info("hci_init_done -> HCI_STATE_WORKING"); 1548 hci_stack->state = HCI_STATE_WORKING; 1549 hci_emit_state(); 1550 hci_run(); 1551 } 1552 1553 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1554 bool command_completed = false; 1555 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1556 uint16_t opcode = little_endian_read_16(packet,3); 1557 if (opcode == hci_stack->last_cmd_opcode){ 1558 command_completed = true; 1559 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1560 } else { 1561 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1562 } 1563 } 1564 1565 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1566 uint8_t status = packet[2]; 1567 uint16_t opcode = little_endian_read_16(packet,4); 1568 if (opcode == hci_stack->last_cmd_opcode){ 1569 if (status){ 1570 command_completed = true; 1571 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1572 } else { 1573 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1574 } 1575 } else { 1576 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1577 } 1578 } 1579 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1580 // Vendor == CSR 1581 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1582 // TODO: track actual command 1583 command_completed = true; 1584 } 1585 1586 // Vendor == Toshiba 1587 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1588 // TODO: track actual command 1589 command_completed = true; 1590 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1591 hci_stack->num_cmd_packets = 1; 1592 } 1593 #endif 1594 1595 return command_completed; 1596 } 1597 1598 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1599 1600 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1601 1602 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1603 1604 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1605 1606 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1607 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1608 // 1609 // HCI Reset 1610 // Timeout 100 ms 1611 // HCI Reset 1612 // Command Complete Reset 1613 // HCI Read Local Version Information 1614 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1615 // hang... 1616 // 1617 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1618 if (!command_completed 1619 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1620 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1621 1622 uint16_t opcode = little_endian_read_16(packet,3); 1623 if (opcode == hci_reset.opcode){ 1624 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1625 return; 1626 } 1627 } 1628 1629 // CSR & H5 1630 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1631 if (!command_completed 1632 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1633 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1634 1635 uint16_t opcode = little_endian_read_16(packet,3); 1636 if (opcode == hci_reset.opcode){ 1637 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1638 return; 1639 } 1640 } 1641 1642 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1643 // fix: Correct substate and behave as command below 1644 if (command_completed){ 1645 switch (hci_stack->substate){ 1646 case HCI_INIT_SEND_RESET: 1647 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1648 break; 1649 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1650 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1651 break; 1652 default: 1653 break; 1654 } 1655 } 1656 1657 #endif 1658 1659 if (!command_completed) return; 1660 1661 bool need_baud_change = false; 1662 bool need_addr_change = false; 1663 1664 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1665 need_baud_change = hci_stack->config 1666 && hci_stack->chipset 1667 && hci_stack->chipset->set_baudrate_command 1668 && hci_stack->hci_transport->set_baudrate 1669 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1670 1671 need_addr_change = hci_stack->custom_bd_addr_set 1672 && hci_stack->chipset 1673 && hci_stack->chipset->set_bd_addr_command; 1674 #endif 1675 1676 switch(hci_stack->substate){ 1677 1678 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1679 case HCI_INIT_SEND_RESET: 1680 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1681 // fix: just correct substate and behave as command below 1682 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1683 btstack_run_loop_remove_timer(&hci_stack->timeout); 1684 break; 1685 case HCI_INIT_W4_SEND_RESET: 1686 btstack_run_loop_remove_timer(&hci_stack->timeout); 1687 break; 1688 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1689 log_info("Received local name, need baud change %d", (int) need_baud_change); 1690 if (need_baud_change){ 1691 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1692 return; 1693 } 1694 // skip baud change 1695 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1696 return; 1697 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1698 // for STLC2500D, baud rate change already happened. 1699 // for others, baud rate gets changed now 1700 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1701 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1702 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1703 hci_stack->hci_transport->set_baudrate(baud_rate); 1704 } 1705 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1706 return; 1707 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1708 btstack_run_loop_remove_timer(&hci_stack->timeout); 1709 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1710 return; 1711 case HCI_INIT_W4_CUSTOM_INIT: 1712 // repeat custom init 1713 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1714 return; 1715 #else 1716 case HCI_INIT_W4_SEND_RESET: 1717 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1718 return ; 1719 #endif 1720 1721 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1722 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1723 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1724 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1725 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1726 return; 1727 } 1728 if (need_addr_change){ 1729 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1730 return; 1731 } 1732 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1733 return; 1734 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1735 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1736 if (need_baud_change){ 1737 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1738 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1739 hci_stack->hci_transport->set_baudrate(baud_rate); 1740 } 1741 if (need_addr_change){ 1742 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1743 return; 1744 } 1745 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1746 return; 1747 case HCI_INIT_W4_SET_BD_ADDR: 1748 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1749 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1750 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1751 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1752 return; 1753 } 1754 // skipping st warm boot 1755 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1756 return; 1757 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1758 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1759 return; 1760 #endif 1761 case HCI_INIT_W4_READ_BD_ADDR: 1762 // only read buffer size if supported 1763 if (hci_stack->local_supported_commands[0] & 0x01) { 1764 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1765 return; 1766 } 1767 // skipping read buffer size 1768 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1769 return; 1770 case HCI_INIT_W4_SET_EVENT_MASK: 1771 // skip Classic init commands for LE only chipsets 1772 if (!hci_classic_supported()){ 1773 #ifdef ENABLE_BLE 1774 if (hci_le_supported()){ 1775 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1776 return; 1777 } 1778 #endif 1779 log_error("Neither BR/EDR nor LE supported"); 1780 hci_init_done(); 1781 return; 1782 } 1783 if (!gap_ssp_supported()){ 1784 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1785 return; 1786 } 1787 break; 1788 #ifdef ENABLE_BLE 1789 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1790 // skip write le host if not supported (e.g. on LE only EM9301) 1791 if (hci_stack->local_supported_commands[0] & 0x02) break; 1792 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1793 return; 1794 1795 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1796 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1797 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1798 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1799 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1800 return; 1801 } 1802 // explicit fall through to reduce repetitions 1803 1804 #ifdef ENABLE_LE_CENTRAL 1805 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1806 #else 1807 hci_init_done(); 1808 #endif 1809 return; 1810 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1811 1812 #endif /* ENABLE_BLE */ 1813 1814 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1815 // skip write secure connections host support if not supported or disabled 1816 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1] & 0x02) == 0) { 1817 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1818 return; 1819 } 1820 break; 1821 1822 #ifdef ENABLE_SCO_OVER_HCI 1823 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1824 // skip write synchronous flow control if not supported 1825 if (hci_stack->local_supported_commands[0] & 0x04) break; 1826 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1827 1828 /* fall through */ 1829 1830 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1831 // skip write default erroneous data reporting if not supported 1832 if (hci_stack->local_supported_commands[0] & 0x08) break; 1833 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1834 1835 /* fall through */ 1836 1837 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1838 // skip bcm set sco pcm config on non-Broadcom chipsets 1839 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1840 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1841 1842 /* fall through */ 1843 1844 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1845 if (!hci_le_supported()){ 1846 // SKIP LE init for Classic only configuration 1847 hci_init_done(); 1848 return; 1849 } 1850 break; 1851 1852 #else /* !ENABLE_SCO_OVER_HCI */ 1853 1854 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1855 #ifdef ENABLE_BLE 1856 if (hci_le_supported()){ 1857 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1858 return; 1859 } 1860 #endif 1861 // SKIP LE init for Classic only configuration 1862 hci_init_done(); 1863 return; 1864 #endif /* ENABLE_SCO_OVER_HCI */ 1865 1866 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1867 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1868 // Response to command before init done state -> init done 1869 case (HCI_INIT_DONE-1): 1870 hci_init_done(); 1871 return; 1872 #endif 1873 1874 default: 1875 break; 1876 } 1877 hci_initializing_next_state(); 1878 } 1879 1880 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1881 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1882 bd_addr_t bd_address; 1883 (void)memcpy(&bd_address, conn->address, 6); 1884 1885 #ifdef ENABLE_CLASSIC 1886 // cache needed data 1887 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1888 #endif 1889 1890 // connection failed, remove entry 1891 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1892 btstack_memory_hci_connection_free( conn ); 1893 1894 #ifdef ENABLE_CLASSIC 1895 // notify client if dedicated bonding 1896 if (notify_dedicated_bonding_failed){ 1897 log_info("hci notify_dedicated_bonding_failed"); 1898 hci_emit_dedicated_bonding_result(bd_address, status); 1899 } 1900 1901 // if authentication error, also delete link key 1902 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1903 gap_drop_link_key_for_bd_addr(bd_address); 1904 } 1905 #endif 1906 } 1907 1908 #ifdef ENABLE_CLASSIC 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 #endif 1950 1951 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1952 // handle BT initialization 1953 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1954 hci_initializing_event_handler(packet, size); 1955 } 1956 1957 // help with BT sleep 1958 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1959 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1960 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1961 hci_initializing_next_state(); 1962 } 1963 } 1964 1965 #ifdef ENABLE_CLASSIC 1966 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 1967 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1968 conn->encryption_key_size = encryption_key_size; 1969 1970 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 1971 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 1972 return; 1973 } 1974 1975 // Request Authentication if not already done 1976 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 1977 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1978 } 1979 #endif 1980 1981 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 1982 1983 uint16_t manufacturer; 1984 #ifdef ENABLE_CLASSIC 1985 hci_con_handle_t handle; 1986 hci_connection_t * conn; 1987 uint8_t status; 1988 #endif 1989 // get num cmd packets - limit to 1 to reduce complexity 1990 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1991 1992 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 1993 switch (opcode){ 1994 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 1995 if (packet[5]) break; 1996 // terminate, name 248 chars 1997 packet[6+248] = 0; 1998 log_info("local name: %s", &packet[6]); 1999 break; 2000 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2001 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2002 if (hci_stack->state != HCI_STATE_INITIALIZING) break; 2003 uint16_t acl_len = little_endian_read_16(packet, 6); 2004 uint16_t sco_len = packet[8]; 2005 2006 // determine usable ACL/SCO payload size 2007 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2008 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2009 2010 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2011 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2012 2013 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2014 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2015 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2016 break; 2017 case HCI_OPCODE_HCI_READ_RSSI: 2018 if (packet[5] == ERROR_CODE_SUCCESS){ 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 break; 2026 #ifdef ENABLE_BLE 2027 case HCI_OPCODE_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 break; 2036 #endif 2037 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2038 case HCI_OPCODE_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 break; 2043 #endif 2044 #ifdef ENABLE_LE_CENTRAL 2045 case HCI_OPCODE_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 break; 2049 #endif 2050 case HCI_OPCODE_HCI_READ_BD_ADDR: 2051 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2052 log_info("Local Address, Status: 0x%02x: Addr: %s", packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 2053 #ifdef ENABLE_CLASSIC 2054 if (hci_stack->link_key_db){ 2055 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2056 } 2057 #endif 2058 break; 2059 #ifdef ENABLE_CLASSIC 2060 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2061 hci_emit_discoverable_enabled(hci_stack->discoverable); 2062 break; 2063 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2064 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2065 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2066 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2067 hci_emit_event(event, sizeof(event), 1); 2068 } 2069 break; 2070 #endif 2071 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2072 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2073 2074 #ifdef ENABLE_CLASSIC 2075 // determine usable ACL packet types based on host buffer size and supported features 2076 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2077 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2078 #endif 2079 // Classic/LE 2080 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2081 break; 2082 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2083 manufacturer = little_endian_read_16(packet, 10); 2084 // map Cypress to Broadcom 2085 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2086 log_info("Treat Cypress as Broadcom"); 2087 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2088 little_endian_store_16(packet, 10, manufacturer); 2089 } 2090 hci_stack->manufacturer = manufacturer; 2091 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2092 break; 2093 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2094 hci_stack->local_supported_commands[0] = 2095 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2096 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2097 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2098 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2099 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2100 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2101 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2102 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+20] & 0x10) << 3); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2103 hci_stack->local_supported_commands[1] = 2104 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+ 2] & 0x40) >> 6) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2105 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+32] & 0x08) >> 2); // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2106 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2107 break; 2108 #ifdef ENABLE_CLASSIC 2109 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2110 if (packet[5]) return; 2111 hci_stack->synchronous_flow_control_enabled = 1; 2112 break; 2113 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2114 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2115 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2116 conn = hci_connection_for_handle(handle); 2117 if (!conn) return; 2118 uint8_t key_size = 0; 2119 if (status == 0){ 2120 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2121 log_info("Handle %x04x key Size: %u", handle, key_size); 2122 } else { 2123 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2124 } 2125 hci_handle_read_encryption_key_size_complete(conn, key_size); 2126 break; 2127 #endif 2128 default: 2129 break; 2130 } 2131 } 2132 2133 static void event_handler(uint8_t *packet, int size){ 2134 2135 uint16_t event_length = packet[1]; 2136 2137 // assert packet is complete 2138 if (size != (event_length + 2)){ 2139 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2140 return; 2141 } 2142 2143 bd_addr_t addr; 2144 bd_addr_type_t addr_type; 2145 hci_con_handle_t handle; 2146 hci_connection_t * conn; 2147 int i; 2148 int create_connection_cmd; 2149 2150 #ifdef ENABLE_CLASSIC 2151 uint8_t link_type; 2152 #endif 2153 2154 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2155 2156 switch (hci_event_packet_get_type(packet)) { 2157 2158 case HCI_EVENT_COMMAND_COMPLETE: 2159 handle_command_complete_event(packet, size); 2160 break; 2161 2162 case HCI_EVENT_COMMAND_STATUS: 2163 // get num cmd packets - limit to 1 to reduce complexity 2164 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2165 2166 // check command status to detected failed outgoing connections 2167 create_connection_cmd = 0; 2168 #ifdef ENABLE_CLASSIC 2169 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2170 create_connection_cmd = 1; 2171 } 2172 #endif 2173 #ifdef ENABLE_LE_CENTRAL 2174 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2175 create_connection_cmd = 1; 2176 } 2177 #endif 2178 if (create_connection_cmd) { 2179 uint8_t status = hci_event_command_status_get_status(packet); 2180 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2181 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); 2182 2183 // reset outgoing address info 2184 memset(hci_stack->outgoing_addr, 0, 6); 2185 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2186 2187 // error => outgoing connection failed 2188 if ((conn != NULL) && (status != 0)){ 2189 hci_handle_connection_failed(conn, status); 2190 } 2191 } 2192 break; 2193 2194 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2195 if (size < 3) return; 2196 uint16_t num_handles = packet[2]; 2197 if (size != (3 + num_handles * 4)) return; 2198 uint16_t offset = 3; 2199 for (i=0; i<num_handles;i++){ 2200 handle = little_endian_read_16(packet, offset) & 0x0fff; 2201 offset += 2; 2202 uint16_t num_packets = little_endian_read_16(packet, offset); 2203 offset += 2; 2204 2205 conn = hci_connection_for_handle(handle); 2206 if (!conn){ 2207 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2208 continue; 2209 } 2210 2211 if (conn->num_packets_sent >= num_packets){ 2212 conn->num_packets_sent -= num_packets; 2213 } else { 2214 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2215 conn->num_packets_sent = 0; 2216 } 2217 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2218 2219 #ifdef ENABLE_CLASSIC 2220 // For SCO, we do the can_send_now_check here 2221 hci_notify_if_sco_can_send_now(); 2222 #endif 2223 } 2224 break; 2225 } 2226 2227 #ifdef ENABLE_CLASSIC 2228 case HCI_EVENT_INQUIRY_COMPLETE: 2229 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2230 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2231 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2232 hci_emit_event(event, sizeof(event), 1); 2233 } 2234 break; 2235 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2236 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2237 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2238 } 2239 break; 2240 case HCI_EVENT_CONNECTION_REQUEST: 2241 reverse_bd_addr(&packet[2], addr); 2242 if (hci_stack->gap_classic_accept_callback != NULL){ 2243 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2244 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2245 bd_addr_copy(hci_stack->decline_addr, addr); 2246 break; 2247 } 2248 } 2249 2250 // TODO: eval COD 8-10 2251 link_type = packet[11]; 2252 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2253 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2254 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2255 if (!conn) { 2256 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2257 } 2258 if (!conn) { 2259 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2260 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2261 bd_addr_copy(hci_stack->decline_addr, addr); 2262 break; 2263 } 2264 conn->role = HCI_ROLE_SLAVE; 2265 conn->state = RECEIVED_CONNECTION_REQUEST; 2266 // store info about eSCO 2267 if (link_type == 0x02){ 2268 conn->remote_supported_features[0] |= 1; 2269 } 2270 hci_run(); 2271 break; 2272 2273 case HCI_EVENT_CONNECTION_COMPLETE: 2274 // Connection management 2275 reverse_bd_addr(&packet[5], addr); 2276 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2277 addr_type = BD_ADDR_TYPE_ACL; 2278 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2279 if (conn) { 2280 if (!packet[2]){ 2281 conn->state = OPEN; 2282 conn->con_handle = little_endian_read_16(packet, 3); 2283 2284 // queue get remote feature 2285 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2286 2287 // queue set supervision timeout if we're master 2288 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2289 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2290 } 2291 2292 // restart timer 2293 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2294 btstack_run_loop_add_timer(&conn->timeout); 2295 2296 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2297 2298 hci_emit_nr_connections_changed(); 2299 } else { 2300 // connection failed 2301 hci_handle_connection_failed(conn, packet[2]); 2302 } 2303 } 2304 break; 2305 2306 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2307 reverse_bd_addr(&packet[5], addr); 2308 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2309 if (packet[2]){ 2310 // connection failed 2311 break; 2312 } 2313 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2314 if (!conn) { 2315 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2316 } 2317 if (!conn) { 2318 break; 2319 } 2320 conn->state = OPEN; 2321 conn->con_handle = little_endian_read_16(packet, 3); 2322 2323 #ifdef ENABLE_SCO_OVER_HCI 2324 // update SCO 2325 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2326 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2327 } 2328 // trigger can send now 2329 if (hci_have_usb_transport()){ 2330 hci_stack->sco_can_send_now = 1; 2331 } 2332 #endif 2333 break; 2334 2335 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2336 handle = little_endian_read_16(packet, 3); 2337 conn = hci_connection_for_handle(handle); 2338 if (!conn) break; 2339 if (!packet[2]){ 2340 const uint8_t * features = &packet[5]; 2341 hci_handle_remote_features_page_0(conn, features); 2342 2343 // read extended features if possible 2344 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2345 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2346 break; 2347 } 2348 } 2349 hci_handle_remote_features_received(conn); 2350 break; 2351 2352 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2353 handle = little_endian_read_16(packet, 3); 2354 conn = hci_connection_for_handle(handle); 2355 if (!conn) break; 2356 // status = ok, page = 1 2357 if (!packet[2]) { 2358 uint8_t page_number = packet[5]; 2359 uint8_t maximum_page_number = packet[6]; 2360 const uint8_t * features = &packet[7]; 2361 bool done = false; 2362 switch (page_number){ 2363 case 1: 2364 hci_handle_remote_features_page_1(conn, features); 2365 if (maximum_page_number >= 2){ 2366 // get Secure Connections (Controller) from Page 2 if available 2367 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2368 } else { 2369 // otherwise, assume SC (Controller) == SC (Host) 2370 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2371 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2372 } 2373 done = true; 2374 } 2375 break; 2376 case 2: 2377 hci_handle_remote_features_page_2(conn, features); 2378 done = true; 2379 break; 2380 default: 2381 break; 2382 } 2383 if (!done) break; 2384 } 2385 hci_handle_remote_features_received(conn); 2386 break; 2387 2388 case HCI_EVENT_LINK_KEY_REQUEST: 2389 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2390 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2391 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2392 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2393 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2394 hci_run(); 2395 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2396 return; 2397 2398 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2399 reverse_bd_addr(&packet[2], addr); 2400 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2401 if (!conn) break; 2402 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2403 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2404 // Change Connection Encryption keeps link key type 2405 if (link_key_type != CHANGED_COMBINATION_KEY){ 2406 conn->link_key_type = link_key_type; 2407 } 2408 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2409 // still forward event to allow dismiss of pairing dialog 2410 break; 2411 } 2412 2413 case HCI_EVENT_PIN_CODE_REQUEST: 2414 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2415 // non-bondable mode: pin code negative reply will be sent 2416 if (!hci_stack->bondable){ 2417 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2418 hci_run(); 2419 return; 2420 } 2421 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2422 if (!hci_stack->link_key_db) break; 2423 hci_event_pin_code_request_get_bd_addr(packet, addr); 2424 hci_stack->link_key_db->delete_link_key(addr); 2425 break; 2426 2427 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2428 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2429 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2430 break; 2431 2432 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2433 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2434 if (!hci_stack->ssp_auto_accept) break; 2435 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2436 break; 2437 2438 case HCI_EVENT_USER_PASSKEY_REQUEST: 2439 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2440 if (!hci_stack->ssp_auto_accept) break; 2441 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2442 break; 2443 case HCI_EVENT_MODE_CHANGE: 2444 handle = hci_event_mode_change_get_handle(packet); 2445 conn = hci_connection_for_handle(handle); 2446 if (!conn) break; 2447 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2448 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2449 break; 2450 #endif 2451 2452 case HCI_EVENT_ENCRYPTION_CHANGE: 2453 handle = hci_event_encryption_change_get_connection_handle(packet); 2454 conn = hci_connection_for_handle(handle); 2455 if (!conn) break; 2456 if (hci_event_encryption_change_get_status(packet) == 0) { 2457 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2458 if (encryption_enabled){ 2459 if (hci_is_le_connection(conn)){ 2460 // For LE, we accept connection as encrypted 2461 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2462 } 2463 #ifdef ENABLE_CLASSIC 2464 else { 2465 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2466 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2467 bool connected_uses_aes_ccm = encryption_enabled == 2; 2468 if (sc_used_during_pairing && !connected_uses_aes_ccm){ 2469 log_info("SC during pairing, but only E0 now -> abort"); 2470 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2471 break; 2472 } 2473 2474 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2475 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2476 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2477 } else { 2478 // if not, pretend everything is perfect 2479 hci_handle_read_encryption_key_size_complete(conn, 16); 2480 } 2481 } 2482 #endif 2483 } else { 2484 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2485 } 2486 } 2487 2488 break; 2489 2490 #ifdef ENABLE_CLASSIC 2491 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2492 handle = hci_event_authentication_complete_get_connection_handle(packet); 2493 conn = hci_connection_for_handle(handle); 2494 if (!conn) break; 2495 2496 // ignore authentication event if we didn't request it 2497 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2498 2499 // dedicated bonding: send result and disconnect 2500 if (conn->bonding_flags & BONDING_DEDICATED){ 2501 conn->bonding_flags &= ~BONDING_DEDICATED; 2502 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2503 conn->bonding_status = packet[2]; 2504 break; 2505 } 2506 2507 // authenticated only if auth status == 0 2508 if (hci_event_authentication_complete_get_status(packet) == 0){ 2509 // authenticated 2510 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2511 2512 // If link key sufficient for requested security and not already encrypted, start encryption 2513 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2514 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2515 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2516 break; 2517 } 2518 } 2519 2520 // emit updated security level 2521 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2522 break; 2523 #endif 2524 2525 // HCI_EVENT_DISCONNECTION_COMPLETE 2526 // has been split, to first notify stack before shutting connection down 2527 // see end of function, too. 2528 case HCI_EVENT_DISCONNECTION_COMPLETE: 2529 if (packet[2]) break; // status != 0 2530 handle = little_endian_read_16(packet, 3); 2531 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2532 if (hci_stack->acl_fragmentation_total_size > 0) { 2533 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2534 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2535 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2536 hci_stack->acl_fragmentation_total_size = 0; 2537 hci_stack->acl_fragmentation_pos = 0; 2538 if (release_buffer){ 2539 hci_release_packet_buffer(); 2540 } 2541 } 2542 } 2543 2544 conn = hci_connection_for_handle(handle); 2545 if (!conn) break; 2546 // mark connection for shutdown 2547 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2548 2549 // emit dedicatd bonding event 2550 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2551 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2552 } 2553 2554 #ifdef ENABLE_BLE 2555 #ifdef ENABLE_LE_PERIPHERAL 2556 // re-enable advertisements for le connections if active 2557 if (hci_is_le_connection(conn)){ 2558 hci_reenable_advertisements_if_needed(); 2559 } 2560 #endif 2561 #endif 2562 break; 2563 2564 case HCI_EVENT_HARDWARE_ERROR: 2565 log_error("Hardware Error: 0x%02x", packet[2]); 2566 if (hci_stack->hardware_error_callback){ 2567 (*hci_stack->hardware_error_callback)(packet[2]); 2568 } else { 2569 // if no special requests, just reboot stack 2570 hci_power_control_off(); 2571 hci_power_control_on(); 2572 } 2573 break; 2574 2575 #ifdef ENABLE_CLASSIC 2576 case HCI_EVENT_ROLE_CHANGE: 2577 if (packet[2]) break; // status != 0 2578 reverse_bd_addr(&packet[3], addr); 2579 addr_type = BD_ADDR_TYPE_ACL; 2580 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2581 if (!conn) break; 2582 conn->role = packet[9]; 2583 break; 2584 #endif 2585 2586 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2587 // release packet buffer only for asynchronous transport and if there are not further fragements 2588 if (hci_transport_synchronous()) { 2589 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2590 return; // instead of break: to avoid re-entering hci_run() 2591 } 2592 hci_stack->acl_fragmentation_tx_active = 0; 2593 if (hci_stack->acl_fragmentation_total_size) break; 2594 hci_release_packet_buffer(); 2595 2596 // L2CAP receives this event via the hci_emit_event below 2597 2598 #ifdef ENABLE_CLASSIC 2599 // For SCO, we do the can_send_now_check here 2600 hci_notify_if_sco_can_send_now(); 2601 #endif 2602 break; 2603 2604 #ifdef ENABLE_CLASSIC 2605 case HCI_EVENT_SCO_CAN_SEND_NOW: 2606 // For SCO, we do the can_send_now_check here 2607 hci_stack->sco_can_send_now = 1; 2608 hci_notify_if_sco_can_send_now(); 2609 return; 2610 2611 // explode inquriy results for easier consumption 2612 case HCI_EVENT_INQUIRY_RESULT: 2613 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2614 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2615 gap_inquiry_explode(packet, size); 2616 break; 2617 #endif 2618 2619 #ifdef ENABLE_BLE 2620 case HCI_EVENT_LE_META: 2621 switch (packet[2]){ 2622 #ifdef ENABLE_LE_CENTRAL 2623 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2624 // log_info("advertising report received"); 2625 if (!hci_stack->le_scanning_enabled) break; 2626 le_handle_advertisement_report(packet, size); 2627 break; 2628 #endif 2629 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2630 // Connection management 2631 reverse_bd_addr(&packet[8], addr); 2632 addr_type = (bd_addr_type_t)packet[7]; 2633 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2634 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2635 2636 #ifdef ENABLE_LE_CENTRAL 2637 // if auto-connect, remove from whitelist in both roles 2638 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2639 hci_remove_from_whitelist(addr_type, addr); 2640 } 2641 // handle error: error is reported only to the initiator -> outgoing connection 2642 if (packet[3]){ 2643 2644 // handle cancelled outgoing connection 2645 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2646 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2647 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2648 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2649 conn = gap_get_outgoing_connection(); 2650 } 2651 2652 // outgoing connection establishment is done 2653 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2654 // remove entry 2655 if (conn){ 2656 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2657 btstack_memory_hci_connection_free( conn ); 2658 } 2659 break; 2660 } 2661 #endif 2662 // on success, both hosts receive connection complete event 2663 if (packet[6] == HCI_ROLE_MASTER){ 2664 #ifdef ENABLE_LE_CENTRAL 2665 // if we're master, it was an outgoing connection and we're done with it 2666 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2667 #endif 2668 } else { 2669 #ifdef ENABLE_LE_PERIPHERAL 2670 // if we're slave, it was an incoming connection, advertisements have stopped 2671 hci_stack->le_advertisements_active = 0; 2672 #endif 2673 } 2674 // LE connections are auto-accepted, so just create a connection if there isn't one already 2675 if (!conn){ 2676 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2677 } 2678 // no memory, sorry. 2679 if (!conn){ 2680 break; 2681 } 2682 2683 conn->state = OPEN; 2684 conn->role = packet[6]; 2685 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2686 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2687 2688 #ifdef ENABLE_LE_PERIPHERAL 2689 if (packet[6] == HCI_ROLE_SLAVE){ 2690 hci_reenable_advertisements_if_needed(); 2691 } 2692 #endif 2693 2694 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2695 2696 // restart timer 2697 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2698 // btstack_run_loop_add_timer(&conn->timeout); 2699 2700 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2701 2702 hci_emit_nr_connections_changed(); 2703 break; 2704 2705 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2706 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2707 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2708 conn = hci_connection_for_handle(handle); 2709 if (!conn) break; 2710 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2711 break; 2712 2713 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2714 // connection 2715 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2716 conn = hci_connection_for_handle(handle); 2717 if (conn) { 2718 // read arguments 2719 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2720 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2721 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2722 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2723 2724 // validate against current connection parameter range 2725 le_connection_parameter_range_t existing_range; 2726 gap_get_connection_parameter_range(&existing_range); 2727 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2728 if (update_parameter){ 2729 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2730 conn->le_conn_interval_min = le_conn_interval_min; 2731 conn->le_conn_interval_max = le_conn_interval_max; 2732 conn->le_conn_latency = le_conn_latency; 2733 conn->le_supervision_timeout = le_supervision_timeout; 2734 } else { 2735 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2736 } 2737 } 2738 break; 2739 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2740 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2741 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2742 conn = hci_connection_for_handle(handle); 2743 if (conn) { 2744 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2745 } 2746 break; 2747 #endif 2748 default: 2749 break; 2750 } 2751 break; 2752 #endif 2753 case HCI_EVENT_VENDOR_SPECIFIC: 2754 // Vendor specific commands often create vendor specific event instead of num completed packets 2755 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2756 switch (hci_stack->manufacturer){ 2757 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2758 hci_stack->num_cmd_packets = 1; 2759 break; 2760 default: 2761 break; 2762 } 2763 break; 2764 default: 2765 break; 2766 } 2767 2768 handle_event_for_current_stack_state(packet, size); 2769 2770 // notify upper stack 2771 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2772 2773 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2774 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2775 if (!packet[2]){ 2776 handle = little_endian_read_16(packet, 3); 2777 hci_connection_t * aConn = hci_connection_for_handle(handle); 2778 if (aConn) { 2779 // discard connection if app did not trigger a reconnect in the event handler 2780 if (aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2781 hci_shutdown_connection(aConn); 2782 } 2783 } 2784 } 2785 } 2786 2787 // execute main loop 2788 hci_run(); 2789 } 2790 2791 #ifdef ENABLE_CLASSIC 2792 2793 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2794 static void sco_schedule_tx(hci_connection_t * conn); 2795 2796 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2797 log_debug("SCO TX Timeout"); 2798 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2799 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2800 if (!conn) return; 2801 2802 // trigger send 2803 conn->sco_tx_ready = 1; 2804 // extra packet if CVSD but SCO buffer is too short 2805 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2806 conn->sco_tx_ready++; 2807 } 2808 hci_notify_if_sco_can_send_now(); 2809 } 2810 2811 2812 #define SCO_TX_AFTER_RX_MS (6) 2813 2814 static void sco_schedule_tx(hci_connection_t * conn){ 2815 2816 uint32_t now = btstack_run_loop_get_time_ms(); 2817 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2818 int time_delta_ms = sco_tx_ms - now; 2819 2820 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2821 2822 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2823 btstack_run_loop_set_timer(timer, time_delta_ms); 2824 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2825 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2826 btstack_run_loop_add_timer(timer); 2827 } 2828 2829 static void sco_handler(uint8_t * packet, uint16_t size){ 2830 // lookup connection struct 2831 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2832 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2833 if (!conn) return; 2834 2835 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2836 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2837 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2838 packet[2] = 0x3c; 2839 memmove(&packet[3], &packet[23], 63); 2840 size = 63; 2841 } 2842 } 2843 2844 if (hci_have_usb_transport()){ 2845 // Nothing to do 2846 } else { 2847 // 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); 2848 if (hci_stack->synchronous_flow_control_enabled == 0){ 2849 uint32_t now = btstack_run_loop_get_time_ms(); 2850 2851 if (!conn->sco_rx_valid){ 2852 // ignore first 10 packets 2853 conn->sco_rx_count++; 2854 // log_debug("sco rx count %u", conn->sco_rx_count); 2855 if (conn->sco_rx_count == 10) { 2856 // use first timestamp as is and pretent it just started 2857 conn->sco_rx_ms = now; 2858 conn->sco_rx_valid = 1; 2859 conn->sco_rx_count = 0; 2860 sco_schedule_tx(conn); 2861 } 2862 } else { 2863 // track expected arrival timme 2864 conn->sco_rx_count++; 2865 conn->sco_rx_ms += 7; 2866 int delta = (int32_t) (now - conn->sco_rx_ms); 2867 if (delta > 0){ 2868 conn->sco_rx_ms++; 2869 } 2870 // log_debug("sco rx %u", conn->sco_rx_ms); 2871 sco_schedule_tx(conn); 2872 } 2873 } 2874 } 2875 // deliver to app 2876 if (hci_stack->sco_packet_handler) { 2877 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2878 } 2879 2880 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2881 conn->num_packets_completed++; 2882 hci_stack->host_completed_packets = 1; 2883 hci_run(); 2884 #endif 2885 } 2886 #endif 2887 2888 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2889 hci_dump_packet(packet_type, 1, packet, size); 2890 switch (packet_type) { 2891 case HCI_EVENT_PACKET: 2892 event_handler(packet, size); 2893 break; 2894 case HCI_ACL_DATA_PACKET: 2895 acl_handler(packet, size); 2896 break; 2897 #ifdef ENABLE_CLASSIC 2898 case HCI_SCO_DATA_PACKET: 2899 sco_handler(packet, size); 2900 break; 2901 #endif 2902 default: 2903 break; 2904 } 2905 } 2906 2907 /** 2908 * @brief Add event packet handler. 2909 */ 2910 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2911 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2912 } 2913 2914 2915 /** Register HCI packet handlers */ 2916 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2917 hci_stack->acl_packet_handler = handler; 2918 } 2919 2920 #ifdef ENABLE_CLASSIC 2921 /** 2922 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2923 */ 2924 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2925 hci_stack->sco_packet_handler = handler; 2926 } 2927 #endif 2928 2929 static void hci_state_reset(void){ 2930 // no connections yet 2931 hci_stack->connections = NULL; 2932 2933 // keep discoverable/connectable as this has been requested by the client(s) 2934 // hci_stack->discoverable = 0; 2935 // hci_stack->connectable = 0; 2936 // hci_stack->bondable = 1; 2937 // hci_stack->own_addr_type = 0; 2938 2939 // buffer is free 2940 hci_stack->hci_packet_buffer_reserved = 0; 2941 2942 // no pending cmds 2943 hci_stack->decline_reason = 0; 2944 hci_stack->new_scan_enable_value = 0xff; 2945 2946 // LE 2947 #ifdef ENABLE_BLE 2948 memset(hci_stack->le_random_address, 0, 6); 2949 hci_stack->le_random_address_set = 0; 2950 #endif 2951 #ifdef ENABLE_LE_CENTRAL 2952 hci_stack->le_scanning_active = 0; 2953 hci_stack->le_scan_type = 0xff; 2954 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2955 hci_stack->le_whitelist = 0; 2956 hci_stack->le_whitelist_capacity = 0; 2957 #endif 2958 } 2959 2960 #ifdef ENABLE_CLASSIC 2961 /** 2962 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2963 */ 2964 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2965 // store and open remote device db 2966 hci_stack->link_key_db = link_key_db; 2967 if (hci_stack->link_key_db) { 2968 hci_stack->link_key_db->open(); 2969 } 2970 } 2971 #endif 2972 2973 void hci_init(const hci_transport_t *transport, const void *config){ 2974 2975 #ifdef HAVE_MALLOC 2976 if (!hci_stack) { 2977 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2978 } 2979 #else 2980 hci_stack = &hci_stack_static; 2981 #endif 2982 memset(hci_stack, 0, sizeof(hci_stack_t)); 2983 2984 // reference to use transport layer implementation 2985 hci_stack->hci_transport = transport; 2986 2987 // reference to used config 2988 hci_stack->config = config; 2989 2990 // setup pointer for outgoing packet buffer 2991 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2992 2993 // max acl payload size defined in config.h 2994 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2995 2996 // register packet handlers with transport 2997 transport->register_packet_handler(&packet_handler); 2998 2999 hci_stack->state = HCI_STATE_OFF; 3000 3001 // class of device 3002 hci_stack->class_of_device = 0x007a020c; // Smartphone 3003 3004 // bondable by default 3005 hci_stack->bondable = 1; 3006 3007 #ifdef ENABLE_CLASSIC 3008 // classic name 3009 hci_stack->local_name = default_classic_name; 3010 3011 // Master slave policy 3012 hci_stack->master_slave_policy = 1; 3013 3014 // Allow Role Switch 3015 hci_stack->allow_role_switch = 1; 3016 3017 // Default / minimum security level = 2 3018 hci_stack->gap_security_level = LEVEL_2; 3019 3020 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3, we use 16 as default 3021 hci_stack->gap_required_encyrption_key_size = 16; 3022 #endif 3023 3024 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3025 hci_stack->ssp_enable = 1; 3026 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3027 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3028 hci_stack->ssp_auto_accept = 1; 3029 3030 // Secure Connections: enable (requires support from Controller) 3031 hci_stack->secure_connections_enable = true; 3032 3033 // voice setting - signed 16 bit pcm data with CVSD over the air 3034 hci_stack->sco_voice_setting = 0x60; 3035 3036 #ifdef ENABLE_LE_CENTRAL 3037 // connection parameter to use for outgoing connections 3038 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3039 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3040 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3041 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3042 hci_stack->le_connection_latency = 4; // 4 3043 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3044 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3045 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3046 3047 // default LE Scanning 3048 hci_stack->le_scan_interval = 0x1e0; 3049 hci_stack->le_scan_window = 0x30; 3050 #endif 3051 3052 #ifdef ENABLE_LE_PERIPHERAL 3053 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3054 #endif 3055 3056 // connection parameter range used to answer connection parameter update requests in l2cap 3057 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3058 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3059 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3060 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3061 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3062 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3063 3064 hci_state_reset(); 3065 } 3066 3067 /** 3068 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3069 */ 3070 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3071 hci_stack->chipset = chipset_driver; 3072 3073 // reset chipset driver - init is also called on power_up 3074 if (hci_stack->chipset && hci_stack->chipset->init){ 3075 hci_stack->chipset->init(hci_stack->config); 3076 } 3077 } 3078 3079 /** 3080 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3081 */ 3082 void hci_set_control(const btstack_control_t *hardware_control){ 3083 // references to used control implementation 3084 hci_stack->control = hardware_control; 3085 // init with transport config 3086 hardware_control->init(hci_stack->config); 3087 } 3088 3089 void hci_close(void){ 3090 // close remote device db 3091 if (hci_stack->link_key_db) { 3092 hci_stack->link_key_db->close(); 3093 } 3094 3095 btstack_linked_list_iterator_t lit; 3096 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3097 while (btstack_linked_list_iterator_has_next(&lit)){ 3098 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3099 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3100 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3101 hci_shutdown_connection(connection); 3102 } 3103 3104 hci_power_control(HCI_POWER_OFF); 3105 3106 #ifdef HAVE_MALLOC 3107 free(hci_stack); 3108 #endif 3109 hci_stack = NULL; 3110 } 3111 3112 #ifdef ENABLE_CLASSIC 3113 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3114 // validate ranage and set 3115 if (encryption_key_size < 7) return; 3116 if (encryption_key_size > 16) return; 3117 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3118 } 3119 3120 void gap_set_security_level(gap_security_level_t security_level){ 3121 hci_stack->gap_security_level = security_level; 3122 } 3123 3124 gap_security_level_t gap_get_security_level(void){ 3125 return hci_stack->gap_security_level; 3126 } 3127 #endif 3128 3129 #ifdef ENABLE_CLASSIC 3130 void gap_set_class_of_device(uint32_t class_of_device){ 3131 hci_stack->class_of_device = class_of_device; 3132 } 3133 3134 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3135 hci_stack->default_link_policy_settings = default_link_policy_settings; 3136 } 3137 3138 void gap_set_allow_role_switch(bool allow_role_switch){ 3139 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3140 } 3141 3142 uint8_t hci_get_allow_role_switch(void){ 3143 return hci_stack->allow_role_switch; 3144 } 3145 3146 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3147 hci_stack->link_supervision_timeout = link_supervision_timeout; 3148 } 3149 3150 void hci_disable_l2cap_timeout_check(void){ 3151 disable_l2cap_timeouts = 1; 3152 } 3153 #endif 3154 3155 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3156 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3157 void hci_set_bd_addr(bd_addr_t addr){ 3158 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3159 hci_stack->custom_bd_addr_set = 1; 3160 } 3161 #endif 3162 3163 // State-Module-Driver overview 3164 // state module low-level 3165 // HCI_STATE_OFF off close 3166 // HCI_STATE_INITIALIZING, on open 3167 // HCI_STATE_WORKING, on open 3168 // HCI_STATE_HALTING, on open 3169 // HCI_STATE_SLEEPING, off/sleep close 3170 // HCI_STATE_FALLING_ASLEEP on open 3171 3172 static int hci_power_control_on(void){ 3173 3174 // power on 3175 int err = 0; 3176 if (hci_stack->control && hci_stack->control->on){ 3177 err = (*hci_stack->control->on)(); 3178 } 3179 if (err){ 3180 log_error( "POWER_ON failed"); 3181 hci_emit_hci_open_failed(); 3182 return err; 3183 } 3184 3185 // int chipset driver 3186 if (hci_stack->chipset && hci_stack->chipset->init){ 3187 hci_stack->chipset->init(hci_stack->config); 3188 } 3189 3190 // init transport 3191 if (hci_stack->hci_transport->init){ 3192 hci_stack->hci_transport->init(hci_stack->config); 3193 } 3194 3195 // open transport 3196 err = hci_stack->hci_transport->open(); 3197 if (err){ 3198 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3199 if (hci_stack->control && hci_stack->control->off){ 3200 (*hci_stack->control->off)(); 3201 } 3202 hci_emit_hci_open_failed(); 3203 return err; 3204 } 3205 return 0; 3206 } 3207 3208 static void hci_power_control_off(void){ 3209 3210 log_info("hci_power_control_off"); 3211 3212 // close low-level device 3213 hci_stack->hci_transport->close(); 3214 3215 log_info("hci_power_control_off - hci_transport closed"); 3216 3217 // power off 3218 if (hci_stack->control && hci_stack->control->off){ 3219 (*hci_stack->control->off)(); 3220 } 3221 3222 log_info("hci_power_control_off - control closed"); 3223 3224 hci_stack->state = HCI_STATE_OFF; 3225 } 3226 3227 static void hci_power_control_sleep(void){ 3228 3229 log_info("hci_power_control_sleep"); 3230 3231 #if 0 3232 // don't close serial port during sleep 3233 3234 // close low-level device 3235 hci_stack->hci_transport->close(hci_stack->config); 3236 #endif 3237 3238 // sleep mode 3239 if (hci_stack->control && hci_stack->control->sleep){ 3240 (*hci_stack->control->sleep)(); 3241 } 3242 3243 hci_stack->state = HCI_STATE_SLEEPING; 3244 } 3245 3246 static int hci_power_control_wake(void){ 3247 3248 log_info("hci_power_control_wake"); 3249 3250 // wake on 3251 if (hci_stack->control && hci_stack->control->wake){ 3252 (*hci_stack->control->wake)(); 3253 } 3254 3255 #if 0 3256 // open low-level device 3257 int err = hci_stack->hci_transport->open(hci_stack->config); 3258 if (err){ 3259 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3260 if (hci_stack->control && hci_stack->control->off){ 3261 (*hci_stack->control->off)(); 3262 } 3263 hci_emit_hci_open_failed(); 3264 return err; 3265 } 3266 #endif 3267 3268 return 0; 3269 } 3270 3271 static void hci_power_transition_to_initializing(void){ 3272 // set up state machine 3273 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3274 hci_stack->hci_packet_buffer_reserved = 0; 3275 hci_stack->state = HCI_STATE_INITIALIZING; 3276 hci_stack->substate = HCI_INIT_SEND_RESET; 3277 } 3278 3279 int hci_power_control(HCI_POWER_MODE power_mode){ 3280 3281 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3282 3283 int err = 0; 3284 switch (hci_stack->state){ 3285 3286 case HCI_STATE_OFF: 3287 switch (power_mode){ 3288 case HCI_POWER_ON: 3289 err = hci_power_control_on(); 3290 if (err) { 3291 log_error("hci_power_control_on() error %d", err); 3292 return err; 3293 } 3294 hci_power_transition_to_initializing(); 3295 break; 3296 case HCI_POWER_OFF: 3297 // do nothing 3298 break; 3299 case HCI_POWER_SLEEP: 3300 // do nothing (with SLEEP == OFF) 3301 break; 3302 } 3303 break; 3304 3305 case HCI_STATE_INITIALIZING: 3306 switch (power_mode){ 3307 case HCI_POWER_ON: 3308 // do nothing 3309 break; 3310 case HCI_POWER_OFF: 3311 // no connections yet, just turn it off 3312 hci_power_control_off(); 3313 break; 3314 case HCI_POWER_SLEEP: 3315 // no connections yet, just turn it off 3316 hci_power_control_sleep(); 3317 break; 3318 } 3319 break; 3320 3321 case HCI_STATE_WORKING: 3322 switch (power_mode){ 3323 case HCI_POWER_ON: 3324 // do nothing 3325 break; 3326 case HCI_POWER_OFF: 3327 // see hci_run 3328 hci_stack->state = HCI_STATE_HALTING; 3329 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3330 break; 3331 case HCI_POWER_SLEEP: 3332 // see hci_run 3333 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3334 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3335 break; 3336 } 3337 break; 3338 3339 case HCI_STATE_HALTING: 3340 switch (power_mode){ 3341 case HCI_POWER_ON: 3342 hci_power_transition_to_initializing(); 3343 break; 3344 case HCI_POWER_OFF: 3345 // do nothing 3346 break; 3347 case HCI_POWER_SLEEP: 3348 // see hci_run 3349 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3350 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3351 break; 3352 } 3353 break; 3354 3355 case HCI_STATE_FALLING_ASLEEP: 3356 switch (power_mode){ 3357 case HCI_POWER_ON: 3358 3359 #ifdef HAVE_PLATFORM_IPHONE_OS 3360 // nothing to do, if H4 supports power management 3361 if (btstack_control_iphone_power_management_enabled()){ 3362 hci_stack->state = HCI_STATE_INITIALIZING; 3363 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3364 break; 3365 } 3366 #endif 3367 hci_power_transition_to_initializing(); 3368 break; 3369 case HCI_POWER_OFF: 3370 // see hci_run 3371 hci_stack->state = HCI_STATE_HALTING; 3372 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3373 break; 3374 case HCI_POWER_SLEEP: 3375 // do nothing 3376 break; 3377 } 3378 break; 3379 3380 case HCI_STATE_SLEEPING: 3381 switch (power_mode){ 3382 case HCI_POWER_ON: 3383 3384 #ifdef HAVE_PLATFORM_IPHONE_OS 3385 // nothing to do, if H4 supports power management 3386 if (btstack_control_iphone_power_management_enabled()){ 3387 hci_stack->state = HCI_STATE_INITIALIZING; 3388 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3389 hci_update_scan_enable(); 3390 break; 3391 } 3392 #endif 3393 err = hci_power_control_wake(); 3394 if (err) return err; 3395 hci_power_transition_to_initializing(); 3396 break; 3397 case HCI_POWER_OFF: 3398 hci_stack->state = HCI_STATE_HALTING; 3399 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3400 break; 3401 case HCI_POWER_SLEEP: 3402 // do nothing 3403 break; 3404 } 3405 break; 3406 } 3407 3408 // create internal event 3409 hci_emit_state(); 3410 3411 // trigger next/first action 3412 hci_run(); 3413 3414 return 0; 3415 } 3416 3417 3418 #ifdef ENABLE_CLASSIC 3419 3420 static void hci_update_scan_enable(void){ 3421 // 2 = page scan, 1 = inq scan 3422 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3423 hci_run(); 3424 } 3425 3426 void gap_discoverable_control(uint8_t enable){ 3427 if (enable) enable = 1; // normalize argument 3428 3429 if (hci_stack->discoverable == enable){ 3430 hci_emit_discoverable_enabled(hci_stack->discoverable); 3431 return; 3432 } 3433 3434 hci_stack->discoverable = enable; 3435 hci_update_scan_enable(); 3436 } 3437 3438 void gap_connectable_control(uint8_t enable){ 3439 if (enable) enable = 1; // normalize argument 3440 3441 // don't emit event 3442 if (hci_stack->connectable == enable) return; 3443 3444 hci_stack->connectable = enable; 3445 hci_update_scan_enable(); 3446 } 3447 #endif 3448 3449 void gap_local_bd_addr(bd_addr_t address_buffer){ 3450 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3451 } 3452 3453 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3454 static void hci_host_num_completed_packets(void){ 3455 3456 // create packet manually as arrays are not supported and num_commands should not get reduced 3457 hci_reserve_packet_buffer(); 3458 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3459 3460 uint16_t size = 0; 3461 uint16_t num_handles = 0; 3462 packet[size++] = 0x35; 3463 packet[size++] = 0x0c; 3464 size++; // skip param len 3465 size++; // skip num handles 3466 3467 // add { handle, packets } entries 3468 btstack_linked_item_t * it; 3469 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3470 hci_connection_t * connection = (hci_connection_t *) it; 3471 if (connection->num_packets_completed){ 3472 little_endian_store_16(packet, size, connection->con_handle); 3473 size += 2; 3474 little_endian_store_16(packet, size, connection->num_packets_completed); 3475 size += 2; 3476 // 3477 num_handles++; 3478 connection->num_packets_completed = 0; 3479 } 3480 } 3481 3482 packet[2] = size - 3; 3483 packet[3] = num_handles; 3484 3485 hci_stack->host_completed_packets = 0; 3486 3487 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3488 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3489 3490 // release packet buffer for synchronous transport implementations 3491 if (hci_transport_synchronous()){ 3492 hci_release_packet_buffer(); 3493 hci_emit_transport_packet_sent(); 3494 } 3495 } 3496 #endif 3497 3498 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3499 UNUSED(ds); 3500 hci_stack->substate = HCI_HALTING_CLOSE; 3501 // allow packet handlers to defer final shutdown 3502 hci_emit_state(); 3503 hci_run(); 3504 } 3505 3506 static bool hci_run_acl_fragments(void){ 3507 if (hci_stack->acl_fragmentation_total_size > 0) { 3508 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3509 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3510 if (connection) { 3511 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3512 hci_send_acl_packet_fragments(connection); 3513 return true; 3514 } 3515 } else { 3516 // connection gone -> discard further fragments 3517 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3518 hci_stack->acl_fragmentation_total_size = 0; 3519 hci_stack->acl_fragmentation_pos = 0; 3520 } 3521 } 3522 return false; 3523 } 3524 3525 #ifdef ENABLE_CLASSIC 3526 static bool hci_run_general_gap_classic(void){ 3527 3528 // decline incoming connections 3529 if (hci_stack->decline_reason){ 3530 uint8_t reason = hci_stack->decline_reason; 3531 hci_stack->decline_reason = 0; 3532 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3533 return true; 3534 } 3535 // send scan enable 3536 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3537 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3538 hci_stack->new_scan_enable_value = 0xff; 3539 return true; 3540 } 3541 // start/stop inquiry 3542 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3543 uint8_t duration = hci_stack->inquiry_state; 3544 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3545 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3546 return true; 3547 } 3548 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3549 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3550 hci_send_cmd(&hci_inquiry_cancel); 3551 return true; 3552 } 3553 // remote name request 3554 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3555 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3556 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3557 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3558 return true; 3559 } 3560 // pairing 3561 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3562 uint8_t state = hci_stack->gap_pairing_state; 3563 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3564 switch (state){ 3565 case GAP_PAIRING_STATE_SEND_PIN: 3566 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); 3567 break; 3568 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3569 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3570 break; 3571 case GAP_PAIRING_STATE_SEND_PASSKEY: 3572 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3573 break; 3574 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3575 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3576 break; 3577 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3578 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3579 break; 3580 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3581 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3582 break; 3583 default: 3584 break; 3585 } 3586 return true; 3587 } 3588 return false; 3589 } 3590 #endif 3591 3592 #ifdef ENABLE_BLE 3593 static bool hci_run_general_gap_le(void){ 3594 3595 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3596 3597 if (hci_stack->state != HCI_STATE_WORKING) return false; 3598 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0) ) return false; 3599 3600 #ifdef ENABLE_LE_CENTRAL 3601 // parameter change requires scanning to be stopped first 3602 if (hci_stack->le_scan_type != 0xff) { 3603 if (hci_stack->le_scanning_active){ 3604 hci_stack->le_scanning_active = 0; 3605 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3606 } else { 3607 int scan_type = (int) hci_stack->le_scan_type; 3608 hci_stack->le_scan_type = 0xff; 3609 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); 3610 } 3611 return true; 3612 } 3613 // finally, we can enable/disable le scan 3614 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3615 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3616 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3617 return true; 3618 } 3619 #endif 3620 #ifdef ENABLE_LE_PERIPHERAL 3621 // le advertisement control 3622 if (hci_stack->le_advertisements_todo){ 3623 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3624 } 3625 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3626 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3627 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3628 return true; 3629 } 3630 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3631 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3632 hci_send_cmd(&hci_le_set_advertising_parameters, 3633 hci_stack->le_advertisements_interval_min, 3634 hci_stack->le_advertisements_interval_max, 3635 hci_stack->le_advertisements_type, 3636 hci_stack->le_own_addr_type, 3637 hci_stack->le_advertisements_direct_address_type, 3638 hci_stack->le_advertisements_direct_address, 3639 hci_stack->le_advertisements_channel_map, 3640 hci_stack->le_advertisements_filter_policy); 3641 return true; 3642 } 3643 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3644 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3645 uint8_t adv_data_clean[31]; 3646 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3647 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3648 hci_stack->le_advertisements_data_len); 3649 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3650 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3651 return true; 3652 } 3653 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3654 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3655 uint8_t scan_data_clean[31]; 3656 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3657 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3658 hci_stack->le_scan_response_data_len); 3659 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3660 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3661 return true; 3662 } 3663 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3664 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3665 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3666 return true; 3667 } 3668 #endif 3669 3670 #ifdef ENABLE_LE_CENTRAL 3671 // 3672 // LE Whitelist Management 3673 // 3674 3675 // check if whitelist needs modification 3676 btstack_linked_list_iterator_t lit; 3677 int modification_pending = 0; 3678 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3679 while (btstack_linked_list_iterator_has_next(&lit)){ 3680 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3681 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3682 modification_pending = 1; 3683 break; 3684 } 3685 } 3686 3687 if (modification_pending){ 3688 // stop connnecting if modification pending 3689 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3690 hci_send_cmd(&hci_le_create_connection_cancel); 3691 return true; 3692 } 3693 3694 // add/remove entries 3695 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3696 while (btstack_linked_list_iterator_has_next(&lit)){ 3697 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3698 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3699 entry->state = LE_WHITELIST_ON_CONTROLLER; 3700 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3701 return true; 3702 } 3703 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3704 bd_addr_t address; 3705 bd_addr_type_t address_type = entry->address_type; 3706 (void)memcpy(address, entry->address, 6); 3707 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3708 btstack_memory_whitelist_entry_free(entry); 3709 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3710 return true; 3711 } 3712 } 3713 } 3714 3715 // start connecting 3716 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && 3717 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3718 bd_addr_t null_addr; 3719 memset(null_addr, 0, 6); 3720 hci_send_cmd(&hci_le_create_connection, 3721 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3722 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3723 1, // use whitelist 3724 0, // peer address type 3725 null_addr, // peer bd addr 3726 hci_stack->le_own_addr_type, // our addr type: 3727 hci_stack->le_connection_interval_min, // conn interval min 3728 hci_stack->le_connection_interval_max, // conn interval max 3729 hci_stack->le_connection_latency, // conn latency 3730 hci_stack->le_supervision_timeout, // conn latency 3731 hci_stack->le_minimum_ce_length, // min ce length 3732 hci_stack->le_maximum_ce_length // max ce length 3733 ); 3734 return true; 3735 } 3736 #endif 3737 return false; 3738 } 3739 #endif 3740 3741 static bool hci_run_general_pending_commmands(void){ 3742 btstack_linked_item_t * it; 3743 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3744 hci_connection_t * connection = (hci_connection_t *) it; 3745 3746 switch(connection->state){ 3747 case SEND_CREATE_CONNECTION: 3748 switch(connection->address_type){ 3749 #ifdef ENABLE_CLASSIC 3750 case BD_ADDR_TYPE_ACL: 3751 log_info("sending hci_create_connection"); 3752 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3753 break; 3754 #endif 3755 default: 3756 #ifdef ENABLE_BLE 3757 #ifdef ENABLE_LE_CENTRAL 3758 // track outgoing connection 3759 hci_stack->outgoing_addr_type = connection->address_type; 3760 (void)memcpy(hci_stack->outgoing_addr, 3761 connection->address, 6); 3762 log_info("sending hci_le_create_connection"); 3763 hci_send_cmd(&hci_le_create_connection, 3764 hci_stack->le_connection_scan_interval, // conn scan interval 3765 hci_stack->le_connection_scan_window, // conn scan windows 3766 0, // don't use whitelist 3767 connection->address_type, // peer address type 3768 connection->address, // peer bd addr 3769 hci_stack->le_own_addr_type, // our addr type: 3770 hci_stack->le_connection_interval_min, // conn interval min 3771 hci_stack->le_connection_interval_max, // conn interval max 3772 hci_stack->le_connection_latency, // conn latency 3773 hci_stack->le_supervision_timeout, // conn latency 3774 hci_stack->le_minimum_ce_length, // min ce length 3775 hci_stack->le_maximum_ce_length // max ce length 3776 ); 3777 connection->state = SENT_CREATE_CONNECTION; 3778 #endif 3779 #endif 3780 break; 3781 } 3782 return true; 3783 3784 #ifdef ENABLE_CLASSIC 3785 case RECEIVED_CONNECTION_REQUEST: 3786 connection->role = HCI_ROLE_SLAVE; 3787 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3788 log_info("sending hci_accept_connection_request"); 3789 connection->state = ACCEPTED_CONNECTION_REQUEST; 3790 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3791 } 3792 return true; 3793 #endif 3794 3795 #ifdef ENABLE_BLE 3796 #ifdef ENABLE_LE_CENTRAL 3797 case SEND_CANCEL_CONNECTION: 3798 connection->state = SENT_CANCEL_CONNECTION; 3799 hci_send_cmd(&hci_le_create_connection_cancel); 3800 return true; 3801 #endif 3802 #endif 3803 case SEND_DISCONNECT: 3804 connection->state = SENT_DISCONNECT; 3805 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3806 return true; 3807 3808 default: 3809 break; 3810 } 3811 3812 // no further commands if connection is about to get shut down 3813 if (connection->state == SENT_DISCONNECT) continue; 3814 3815 if (connection->authentication_flags & READ_RSSI){ 3816 connectionClearAuthenticationFlags(connection, READ_RSSI); 3817 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3818 return true; 3819 } 3820 3821 #ifdef ENABLE_CLASSIC 3822 3823 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 3824 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 3825 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 3826 return true; 3827 } 3828 3829 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3830 log_info("responding to link key request"); 3831 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3832 3833 link_key_t link_key; 3834 link_key_type_t link_key_type; 3835 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 3836 3837 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3838 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 3839 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 3840 if (sc_downgrade){ 3841 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 3842 connection->state = SENT_DISCONNECT; 3843 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 3844 return true; 3845 } 3846 3847 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 3848 if (have_link_key && security_level_sufficient){ 3849 connection->link_key_type = link_key_type; 3850 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3851 } else { 3852 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3853 } 3854 return true; 3855 } 3856 3857 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3858 log_info("denying to pin request"); 3859 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3860 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3861 return true; 3862 } 3863 3864 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3865 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3866 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3867 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3868 // tweak authentication requirements 3869 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3870 if (connection->bonding_flags & BONDING_DEDICATED){ 3871 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3872 } 3873 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3874 authreq |= 1; 3875 } 3876 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3877 } else { 3878 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3879 } 3880 return true; 3881 } 3882 3883 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3884 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3885 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3886 return true; 3887 } 3888 3889 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3890 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3891 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3892 return true; 3893 } 3894 3895 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 3896 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 3897 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3898 return true; 3899 } 3900 3901 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 3902 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3903 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 3904 return true; 3905 } 3906 3907 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 3908 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3909 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 3910 return true; 3911 } 3912 3913 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3914 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3915 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3916 connection->state = SENT_DISCONNECT; 3917 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3918 return true; 3919 } 3920 3921 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3922 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3923 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 3924 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3925 return true; 3926 } 3927 3928 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3929 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3930 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3931 return true; 3932 } 3933 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3934 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3935 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3936 return true; 3937 } 3938 #endif 3939 3940 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3941 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3942 if (connection->state != SENT_DISCONNECT){ 3943 connection->state = SENT_DISCONNECT; 3944 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 3945 return true; 3946 } 3947 } 3948 3949 #ifdef ENABLE_CLASSIC 3950 uint16_t sniff_min_interval; 3951 switch (connection->sniff_min_interval){ 3952 case 0: 3953 break; 3954 case 0xffff: 3955 connection->sniff_min_interval = 0; 3956 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3957 return true; 3958 default: 3959 sniff_min_interval = connection->sniff_min_interval; 3960 connection->sniff_min_interval = 0; 3961 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3962 return true; 3963 } 3964 #endif 3965 3966 #ifdef ENABLE_BLE 3967 switch (connection->le_con_parameter_update_state){ 3968 // response to L2CAP CON PARAMETER UPDATE REQUEST 3969 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3970 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3971 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3972 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3973 0x0000, 0xffff); 3974 return true; 3975 case CON_PARAMETER_UPDATE_REPLY: 3976 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3977 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3978 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3979 0x0000, 0xffff); 3980 return true; 3981 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3982 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3983 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3984 return true; 3985 default: 3986 break; 3987 } 3988 if (connection->le_phy_update_all_phys != 0xff){ 3989 uint8_t all_phys = connection->le_phy_update_all_phys; 3990 connection->le_phy_update_all_phys = 0xff; 3991 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); 3992 return true; 3993 } 3994 #endif 3995 } 3996 return false; 3997 } 3998 3999 static void hci_run(void){ 4000 4001 bool done; 4002 4003 // send continuation fragments first, as they block the prepared packet buffer 4004 done = hci_run_acl_fragments(); 4005 if (done) return; 4006 4007 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4008 // send host num completed packets next as they don't require num_cmd_packets > 0 4009 if (!hci_can_send_comand_packet_transport()) return; 4010 if (hci_stack->host_completed_packets){ 4011 hci_host_num_completed_packets(); 4012 return; 4013 } 4014 #endif 4015 4016 if (!hci_can_send_command_packet_now()) return; 4017 4018 // global/non-connection oriented commands 4019 4020 4021 #ifdef ENABLE_CLASSIC 4022 // general gap classic 4023 done = hci_run_general_gap_classic(); 4024 if (done) return; 4025 #endif 4026 4027 #ifdef ENABLE_BLE 4028 // general gap le 4029 done = hci_run_general_gap_le(); 4030 if (done) return; 4031 #endif 4032 4033 // send pending HCI commands 4034 done = hci_run_general_pending_commmands(); 4035 if (done) return; 4036 4037 // stack state sub statemachines 4038 hci_connection_t * connection; 4039 switch (hci_stack->state){ 4040 case HCI_STATE_INITIALIZING: 4041 hci_initializing_run(); 4042 break; 4043 4044 case HCI_STATE_HALTING: 4045 4046 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4047 switch (hci_stack->substate){ 4048 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4049 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4050 4051 #ifdef ENABLE_BLE 4052 #ifdef ENABLE_LE_CENTRAL 4053 // free whitelist entries 4054 { 4055 btstack_linked_list_iterator_t lit; 4056 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4057 while (btstack_linked_list_iterator_has_next(&lit)){ 4058 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4059 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4060 btstack_memory_whitelist_entry_free(entry); 4061 } 4062 } 4063 #endif 4064 #endif 4065 // close all open connections 4066 connection = (hci_connection_t *) hci_stack->connections; 4067 if (connection){ 4068 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4069 if (!hci_can_send_command_packet_now()) return; 4070 4071 // check state 4072 if (connection->state == SENT_DISCONNECT) return; 4073 connection->state = SENT_DISCONNECT; 4074 4075 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4076 4077 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4078 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4079 4080 // ... which would be ignored anyway as we shutdown (free) the connection now 4081 hci_shutdown_connection(connection); 4082 4083 // finally, send the disconnect command 4084 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4085 return; 4086 } 4087 4088 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4089 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4090 log_info("HCI_STATE_HALTING: wait 50 ms"); 4091 hci_stack->substate = HCI_HALTING_W4_TIMER; 4092 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4093 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4094 btstack_run_loop_add_timer(&hci_stack->timeout); 4095 break; 4096 } 4097 4098 /* fall through */ 4099 4100 case HCI_HALTING_CLOSE: 4101 log_info("HCI_STATE_HALTING, calling off"); 4102 4103 // switch mode 4104 hci_power_control_off(); 4105 4106 log_info("HCI_STATE_HALTING, emitting state"); 4107 hci_emit_state(); 4108 log_info("HCI_STATE_HALTING, done"); 4109 break; 4110 4111 case HCI_HALTING_W4_TIMER: 4112 // keep waiting 4113 4114 break; 4115 default: 4116 break; 4117 } 4118 4119 break; 4120 4121 case HCI_STATE_FALLING_ASLEEP: 4122 switch(hci_stack->substate) { 4123 case HCI_FALLING_ASLEEP_DISCONNECT: 4124 log_info("HCI_STATE_FALLING_ASLEEP"); 4125 // close all open connections 4126 connection = (hci_connection_t *) hci_stack->connections; 4127 4128 #ifdef HAVE_PLATFORM_IPHONE_OS 4129 // don't close connections, if H4 supports power management 4130 if (btstack_control_iphone_power_management_enabled()){ 4131 connection = NULL; 4132 } 4133 #endif 4134 if (connection){ 4135 4136 // send disconnect 4137 if (!hci_can_send_command_packet_now()) return; 4138 4139 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4140 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4141 4142 // send disconnected event right away - causes higher layer connections to get closed, too. 4143 hci_shutdown_connection(connection); 4144 return; 4145 } 4146 4147 if (hci_classic_supported()){ 4148 // disable page and inquiry scan 4149 if (!hci_can_send_command_packet_now()) return; 4150 4151 log_info("HCI_STATE_HALTING, disabling inq scans"); 4152 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4153 4154 // continue in next sub state 4155 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4156 break; 4157 } 4158 4159 /* fall through */ 4160 4161 case HCI_FALLING_ASLEEP_COMPLETE: 4162 log_info("HCI_STATE_HALTING, calling sleep"); 4163 #ifdef HAVE_PLATFORM_IPHONE_OS 4164 // don't actually go to sleep, if H4 supports power management 4165 if (btstack_control_iphone_power_management_enabled()){ 4166 // SLEEP MODE reached 4167 hci_stack->state = HCI_STATE_SLEEPING; 4168 hci_emit_state(); 4169 break; 4170 } 4171 #endif 4172 // switch mode 4173 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4174 hci_emit_state(); 4175 break; 4176 4177 default: 4178 break; 4179 } 4180 break; 4181 4182 default: 4183 break; 4184 } 4185 } 4186 4187 int hci_send_cmd_packet(uint8_t *packet, int size){ 4188 // house-keeping 4189 4190 #ifdef ENABLE_CLASSIC 4191 bd_addr_t addr; 4192 hci_connection_t * conn; 4193 uint8_t initiator_filter_policy; 4194 #endif 4195 4196 uint16_t opcode = little_endian_read_16(packet, 0); 4197 switch (opcode) { 4198 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4199 hci_stack->loopback_mode = packet[3]; 4200 break; 4201 4202 #ifdef ENABLE_CLASSIC 4203 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4204 reverse_bd_addr(&packet[3], addr); 4205 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4206 4207 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4208 if (!conn) { 4209 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4210 if (!conn) { 4211 // notify client that alloc failed 4212 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4213 return -1; // packet not sent to controller 4214 } 4215 conn->state = SEND_CREATE_CONNECTION; 4216 } 4217 log_info("conn state %u", conn->state); 4218 switch (conn->state) { 4219 // if connection active exists 4220 case OPEN: 4221 // and OPEN, emit connection complete command 4222 hci_emit_connection_complete(addr, conn->con_handle, 0); 4223 return -1; // packet not sent to controller 4224 case RECEIVED_DISCONNECTION_COMPLETE: 4225 // create connection triggered in disconnect complete event, let's do it now 4226 break; 4227 case SEND_CREATE_CONNECTION: 4228 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4229 break; 4230 default: 4231 // otherwise, just ignore as it is already in the open process 4232 return -1; // packet not sent to controller 4233 } 4234 conn->state = SENT_CREATE_CONNECTION; 4235 4236 // track outgoing connection 4237 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4238 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4239 break; 4240 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4241 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4242 break; 4243 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4244 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4245 break; 4246 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4247 if (hci_stack->link_key_db) { 4248 reverse_bd_addr(&packet[3], addr); 4249 hci_stack->link_key_db->delete_link_key(addr); 4250 } 4251 break; 4252 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4253 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4254 reverse_bd_addr(&packet[3], addr); 4255 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4256 if (conn) { 4257 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4258 } 4259 break; 4260 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4261 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4262 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4263 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4264 reverse_bd_addr(&packet[3], addr); 4265 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4266 if (conn) { 4267 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4268 } 4269 break; 4270 4271 #ifdef ENABLE_SCO_OVER_HCI 4272 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4273 // setup_synchronous_connection? Voice setting at offset 22 4274 // TODO: compare to current setting if sco connection already active 4275 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4276 break; 4277 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4278 // accept_synchronus_connection? Voice setting at offset 18 4279 // TODO: compare to current setting if sco connection already active 4280 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4281 break; 4282 #endif 4283 #endif 4284 4285 #ifdef ENABLE_BLE 4286 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4287 hci_stack->le_random_address_set = 1; 4288 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4289 break; 4290 #ifdef ENABLE_LE_PERIPHERAL 4291 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4292 hci_stack->le_advertisements_active = packet[3]; 4293 break; 4294 #endif 4295 #ifdef ENABLE_LE_CENTRAL 4296 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4297 // white list used? 4298 initiator_filter_policy = packet[7]; 4299 switch (initiator_filter_policy) { 4300 case 0: 4301 // whitelist not used 4302 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4303 break; 4304 case 1: 4305 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4306 break; 4307 default: 4308 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4309 break; 4310 } 4311 break; 4312 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4313 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4314 break; 4315 #endif 4316 #endif 4317 default: 4318 break; 4319 } 4320 4321 hci_stack->num_cmd_packets--; 4322 4323 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4324 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4325 } 4326 4327 // disconnect because of security block 4328 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4329 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4330 if (!connection) return; 4331 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4332 } 4333 4334 4335 // Configure Secure Simple Pairing 4336 4337 #ifdef ENABLE_CLASSIC 4338 4339 // enable will enable SSP during init 4340 void gap_ssp_set_enable(int enable){ 4341 hci_stack->ssp_enable = enable; 4342 } 4343 4344 static int hci_local_ssp_activated(void){ 4345 return gap_ssp_supported() && hci_stack->ssp_enable; 4346 } 4347 4348 // if set, BTstack will respond to io capability request using authentication requirement 4349 void gap_ssp_set_io_capability(int io_capability){ 4350 hci_stack->ssp_io_capability = io_capability; 4351 } 4352 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4353 hci_stack->ssp_authentication_requirement = authentication_requirement; 4354 } 4355 4356 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4357 void gap_ssp_set_auto_accept(int auto_accept){ 4358 hci_stack->ssp_auto_accept = auto_accept; 4359 } 4360 4361 void gap_secure_connections_enable(bool enable){ 4362 hci_stack->secure_connections_enable = enable; 4363 } 4364 4365 #endif 4366 4367 // va_list part of hci_send_cmd 4368 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4369 if (!hci_can_send_command_packet_now()){ 4370 log_error("hci_send_cmd called but cannot send packet now"); 4371 return 0; 4372 } 4373 4374 // for HCI INITIALIZATION 4375 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4376 hci_stack->last_cmd_opcode = cmd->opcode; 4377 4378 hci_reserve_packet_buffer(); 4379 uint8_t * packet = hci_stack->hci_packet_buffer; 4380 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4381 int err = hci_send_cmd_packet(packet, size); 4382 4383 // release packet buffer on error or for synchronous transport implementations 4384 if ((err < 0) || hci_transport_synchronous()){ 4385 hci_release_packet_buffer(); 4386 hci_emit_transport_packet_sent(); 4387 } 4388 4389 return err; 4390 } 4391 4392 /** 4393 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4394 */ 4395 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4396 va_list argptr; 4397 va_start(argptr, cmd); 4398 int res = hci_send_cmd_va_arg(cmd, argptr); 4399 va_end(argptr); 4400 return res; 4401 } 4402 4403 // Create various non-HCI events. 4404 // TODO: generalize, use table similar to hci_create_command 4405 4406 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4407 // dump packet 4408 if (dump) { 4409 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4410 } 4411 4412 // dispatch to all event handlers 4413 btstack_linked_list_iterator_t it; 4414 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4415 while (btstack_linked_list_iterator_has_next(&it)){ 4416 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4417 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4418 } 4419 } 4420 4421 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4422 if (!hci_stack->acl_packet_handler) return; 4423 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4424 } 4425 4426 #ifdef ENABLE_CLASSIC 4427 static void hci_notify_if_sco_can_send_now(void){ 4428 // notify SCO sender if waiting 4429 if (!hci_stack->sco_waiting_for_can_send_now) return; 4430 if (hci_can_send_sco_packet_now()){ 4431 hci_stack->sco_waiting_for_can_send_now = 0; 4432 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4433 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4434 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4435 } 4436 } 4437 4438 // parsing end emitting has been merged to reduce code size 4439 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4440 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4441 4442 uint8_t * eir_data; 4443 ad_context_t context; 4444 const uint8_t * name; 4445 uint8_t name_len; 4446 4447 if (size < 3) return; 4448 4449 int event_type = hci_event_packet_get_type(packet); 4450 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4451 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4452 4453 switch (event_type){ 4454 case HCI_EVENT_INQUIRY_RESULT: 4455 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4456 if (size != (3 + (num_responses * 14))) return; 4457 break; 4458 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4459 if (size != 257) return; 4460 if (num_responses != 1) return; 4461 break; 4462 default: 4463 return; 4464 } 4465 4466 // event[1] is set at the end 4467 int i; 4468 for (i=0; i<num_responses;i++){ 4469 memset(event, 0, sizeof(event)); 4470 event[0] = GAP_EVENT_INQUIRY_RESULT; 4471 uint8_t event_size = 18; // if name is not set by EIR 4472 4473 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4474 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4475 (void)memcpy(&event[9], 4476 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4477 3); // class of device 4478 (void)memcpy(&event[12], 4479 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4480 2); // clock offset 4481 4482 switch (event_type){ 4483 case HCI_EVENT_INQUIRY_RESULT: 4484 // 14,15,16,17 = 0, size 18 4485 break; 4486 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4487 event[14] = 1; 4488 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4489 // 16,17 = 0, size 18 4490 break; 4491 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4492 event[14] = 1; 4493 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4494 // EIR packets only contain a single inquiry response 4495 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4496 name = NULL; 4497 // Iterate over EIR data 4498 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4499 uint8_t data_type = ad_iterator_get_data_type(&context); 4500 uint8_t data_size = ad_iterator_get_data_len(&context); 4501 const uint8_t * data = ad_iterator_get_data(&context); 4502 // Prefer Complete Local Name over Shortend Local Name 4503 switch (data_type){ 4504 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4505 if (name) continue; 4506 /* fall through */ 4507 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4508 name = data; 4509 name_len = data_size; 4510 break; 4511 default: 4512 break; 4513 } 4514 } 4515 if (name){ 4516 event[16] = 1; 4517 // truncate name if needed 4518 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4519 event[17] = len; 4520 (void)memcpy(&event[18], name, len); 4521 event_size += len; 4522 } 4523 break; 4524 } 4525 event[1] = event_size - 2; 4526 hci_emit_event(event, event_size, 1); 4527 } 4528 } 4529 #endif 4530 4531 void hci_emit_state(void){ 4532 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4533 uint8_t event[3]; 4534 event[0] = BTSTACK_EVENT_STATE; 4535 event[1] = sizeof(event) - 2; 4536 event[2] = hci_stack->state; 4537 hci_emit_event(event, sizeof(event), 1); 4538 } 4539 4540 #ifdef ENABLE_CLASSIC 4541 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4542 uint8_t event[13]; 4543 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4544 event[1] = sizeof(event) - 2; 4545 event[2] = status; 4546 little_endian_store_16(event, 3, con_handle); 4547 reverse_bd_addr(address, &event[5]); 4548 event[11] = 1; // ACL connection 4549 event[12] = 0; // encryption disabled 4550 hci_emit_event(event, sizeof(event), 1); 4551 } 4552 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4553 if (disable_l2cap_timeouts) return; 4554 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4555 uint8_t event[4]; 4556 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4557 event[1] = sizeof(event) - 2; 4558 little_endian_store_16(event, 2, conn->con_handle); 4559 hci_emit_event(event, sizeof(event), 1); 4560 } 4561 #endif 4562 4563 #ifdef ENABLE_BLE 4564 #ifdef ENABLE_LE_CENTRAL 4565 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4566 uint8_t event[21]; 4567 event[0] = HCI_EVENT_LE_META; 4568 event[1] = sizeof(event) - 2; 4569 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4570 event[3] = status; 4571 little_endian_store_16(event, 4, con_handle); 4572 event[6] = 0; // TODO: role 4573 event[7] = address_type; 4574 reverse_bd_addr(address, &event[8]); 4575 little_endian_store_16(event, 14, 0); // interval 4576 little_endian_store_16(event, 16, 0); // latency 4577 little_endian_store_16(event, 18, 0); // supervision timeout 4578 event[20] = 0; // master clock accuracy 4579 hci_emit_event(event, sizeof(event), 1); 4580 } 4581 #endif 4582 #endif 4583 4584 static void hci_emit_transport_packet_sent(void){ 4585 // notify upper stack that it might be possible to send again 4586 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4587 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4588 } 4589 4590 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4591 uint8_t event[6]; 4592 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4593 event[1] = sizeof(event) - 2; 4594 event[2] = 0; // status = OK 4595 little_endian_store_16(event, 3, con_handle); 4596 event[5] = reason; 4597 hci_emit_event(event, sizeof(event), 1); 4598 } 4599 4600 static void hci_emit_nr_connections_changed(void){ 4601 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4602 uint8_t event[3]; 4603 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4604 event[1] = sizeof(event) - 2; 4605 event[2] = nr_hci_connections(); 4606 hci_emit_event(event, sizeof(event), 1); 4607 } 4608 4609 static void hci_emit_hci_open_failed(void){ 4610 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4611 uint8_t event[2]; 4612 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4613 event[1] = sizeof(event) - 2; 4614 hci_emit_event(event, sizeof(event), 1); 4615 } 4616 4617 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4618 log_info("hci_emit_dedicated_bonding_result %u ", status); 4619 uint8_t event[9]; 4620 int pos = 0; 4621 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4622 event[pos++] = sizeof(event) - 2; 4623 event[pos++] = status; 4624 reverse_bd_addr(address, &event[pos]); 4625 hci_emit_event(event, sizeof(event), 1); 4626 } 4627 4628 4629 #ifdef ENABLE_CLASSIC 4630 4631 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4632 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4633 uint8_t event[5]; 4634 int pos = 0; 4635 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4636 event[pos++] = sizeof(event) - 2; 4637 little_endian_store_16(event, 2, con_handle); 4638 pos += 2; 4639 event[pos++] = level; 4640 hci_emit_event(event, sizeof(event), 1); 4641 } 4642 4643 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4644 if (!connection) return LEVEL_0; 4645 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4646 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 4647 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4648 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4649 // LEVEL 4 always requires 128 bit encrytion key size 4650 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4651 security_level = LEVEL_3; 4652 } 4653 return security_level; 4654 } 4655 4656 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4657 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4658 uint8_t event[3]; 4659 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4660 event[1] = sizeof(event) - 2; 4661 event[2] = enabled; 4662 hci_emit_event(event, sizeof(event), 1); 4663 } 4664 4665 // query if remote side supports eSCO 4666 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4667 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4668 if (!connection) return 0; 4669 return (connection->remote_supported_features[0] & 1) != 0; 4670 } 4671 4672 static bool hci_ssp_supported(hci_connection_t * connection){ 4673 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 4674 return (connection->bonding_flags & mask) == mask; 4675 } 4676 4677 // query if remote side supports SSP 4678 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4679 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4680 if (!connection) return 0; 4681 return hci_ssp_supported(connection) ? 1 : 0; 4682 } 4683 4684 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4685 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4686 } 4687 4688 // GAP API 4689 /** 4690 * @bbrief enable/disable bonding. default is enabled 4691 * @praram enabled 4692 */ 4693 void gap_set_bondable_mode(int enable){ 4694 hci_stack->bondable = enable ? 1 : 0; 4695 } 4696 /** 4697 * @brief Get bondable mode. 4698 * @return 1 if bondable 4699 */ 4700 int gap_get_bondable_mode(void){ 4701 return hci_stack->bondable; 4702 } 4703 4704 /** 4705 * @brief map link keys to security levels 4706 */ 4707 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4708 switch (link_key_type){ 4709 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4710 return LEVEL_4; 4711 case COMBINATION_KEY: 4712 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4713 return LEVEL_3; 4714 default: 4715 return LEVEL_2; 4716 } 4717 } 4718 4719 /** 4720 * @brief map link keys to secure connection yes/no 4721 */ 4722 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4723 switch (link_key_type){ 4724 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4725 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4726 return 1; 4727 default: 4728 return 0; 4729 } 4730 } 4731 4732 /** 4733 * @brief map link keys to authenticated 4734 */ 4735 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4736 switch (link_key_type){ 4737 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4738 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4739 return 1; 4740 default: 4741 return 0; 4742 } 4743 } 4744 4745 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4746 log_info("gap_mitm_protection_required_for_security_level %u", level); 4747 return level > LEVEL_2; 4748 } 4749 4750 /** 4751 * @brief get current security level 4752 */ 4753 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4754 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4755 if (!connection) return LEVEL_0; 4756 return gap_security_level_for_connection(connection); 4757 } 4758 4759 /** 4760 * @brief request connection to device to 4761 * @result GAP_AUTHENTICATION_RESULT 4762 */ 4763 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4764 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4765 if (!connection){ 4766 hci_emit_security_level(con_handle, LEVEL_0); 4767 return; 4768 } 4769 gap_security_level_t current_level = gap_security_level(con_handle); 4770 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4771 requested_level, connection->requested_security_level, current_level); 4772 4773 // assumption: earlier requested security higher than current level => security request is active 4774 if (current_level < connection->requested_security_level){ 4775 if (connection->requested_security_level < requested_level){ 4776 // increase requested level as new level is higher 4777 4778 // TODO: handle re-authentication when done 4779 4780 connection->requested_security_level = requested_level; 4781 } 4782 return; 4783 } 4784 4785 // no request active, notify if security sufficient 4786 if (requested_level <= current_level){ 4787 hci_emit_security_level(con_handle, current_level); 4788 return; 4789 } 4790 4791 // start pairing to increase security level 4792 connection->requested_security_level = requested_level; 4793 4794 #if 0 4795 // sending encryption request without a link key results in an error. 4796 // TODO: figure out how to use it properly 4797 4798 // would enabling ecnryption suffice (>= LEVEL_2)? 4799 if (hci_stack->link_key_db){ 4800 link_key_type_t link_key_type; 4801 link_key_t link_key; 4802 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4803 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4804 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4805 return; 4806 } 4807 } 4808 } 4809 #endif 4810 4811 // start to authenticate connection if not already active 4812 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 4813 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4814 hci_run(); 4815 } 4816 4817 /** 4818 * @brief start dedicated bonding with device. disconnect after bonding 4819 * @param device 4820 * @param request MITM protection 4821 * @result GAP_DEDICATED_BONDING_COMPLETE 4822 */ 4823 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4824 4825 // create connection state machine 4826 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 4827 4828 if (!connection){ 4829 return BTSTACK_MEMORY_ALLOC_FAILED; 4830 } 4831 4832 // delete linkn key 4833 gap_drop_link_key_for_bd_addr(device); 4834 4835 // configure LEVEL_2/3, dedicated bonding 4836 connection->state = SEND_CREATE_CONNECTION; 4837 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4838 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4839 connection->bonding_flags = BONDING_DEDICATED; 4840 4841 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4842 4843 // handle: connnection failure (connection complete != ok) 4844 // handle: authentication failure 4845 // handle: disconnect on done 4846 4847 hci_run(); 4848 4849 return 0; 4850 } 4851 #endif 4852 4853 void gap_set_local_name(const char * local_name){ 4854 hci_stack->local_name = local_name; 4855 } 4856 4857 4858 #ifdef ENABLE_BLE 4859 4860 #ifdef ENABLE_LE_CENTRAL 4861 void gap_start_scan(void){ 4862 hci_stack->le_scanning_enabled = 1; 4863 hci_run(); 4864 } 4865 4866 void gap_stop_scan(void){ 4867 hci_stack->le_scanning_enabled = 0; 4868 hci_run(); 4869 } 4870 4871 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4872 hci_stack->le_scan_type = scan_type; 4873 hci_stack->le_scan_interval = scan_interval; 4874 hci_stack->le_scan_window = scan_window; 4875 hci_run(); 4876 } 4877 4878 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4879 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4880 if (!conn){ 4881 log_info("gap_connect: no connection exists yet, creating context"); 4882 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4883 if (!conn){ 4884 // notify client that alloc failed 4885 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4886 log_info("gap_connect: failed to alloc hci_connection_t"); 4887 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4888 } 4889 conn->state = SEND_CREATE_CONNECTION; 4890 log_info("gap_connect: send create connection next"); 4891 hci_run(); 4892 return ERROR_CODE_SUCCESS; 4893 } 4894 4895 if (!hci_is_le_connection(conn) || 4896 (conn->state == SEND_CREATE_CONNECTION) || 4897 (conn->state == SENT_CREATE_CONNECTION)) { 4898 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4899 log_error("gap_connect: classic connection or connect is already being created"); 4900 return GATT_CLIENT_IN_WRONG_STATE; 4901 } 4902 4903 // check if connection was just disconnected 4904 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4905 log_info("gap_connect: send create connection (again)"); 4906 conn->state = SEND_CREATE_CONNECTION; 4907 hci_run(); 4908 return ERROR_CODE_SUCCESS; 4909 } 4910 4911 log_info("gap_connect: context exists with state %u", conn->state); 4912 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4913 hci_run(); 4914 return ERROR_CODE_SUCCESS; 4915 } 4916 4917 // @assumption: only a single outgoing LE Connection exists 4918 static hci_connection_t * gap_get_outgoing_connection(void){ 4919 btstack_linked_item_t *it; 4920 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4921 hci_connection_t * conn = (hci_connection_t *) it; 4922 if (!hci_is_le_connection(conn)) continue; 4923 switch (conn->state){ 4924 case SEND_CREATE_CONNECTION: 4925 case SENT_CREATE_CONNECTION: 4926 case SENT_CANCEL_CONNECTION: 4927 return conn; 4928 default: 4929 break; 4930 }; 4931 } 4932 return NULL; 4933 } 4934 4935 uint8_t gap_connect_cancel(void){ 4936 hci_connection_t * conn = gap_get_outgoing_connection(); 4937 if (!conn) return 0; 4938 switch (conn->state){ 4939 case SEND_CREATE_CONNECTION: 4940 // skip sending create connection and emit event instead 4941 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4942 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4943 btstack_memory_hci_connection_free( conn ); 4944 break; 4945 case SENT_CREATE_CONNECTION: 4946 // request to send cancel connection 4947 conn->state = SEND_CANCEL_CONNECTION; 4948 hci_run(); 4949 break; 4950 default: 4951 break; 4952 } 4953 return 0; 4954 } 4955 #endif 4956 4957 #ifdef ENABLE_LE_CENTRAL 4958 /** 4959 * @brief Set connection parameters for outgoing connections 4960 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4961 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4962 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4963 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4964 * @param conn_latency, default: 4 4965 * @param supervision_timeout (unit: 10ms), default: 720 ms 4966 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4967 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4968 */ 4969 4970 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4971 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4972 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4973 hci_stack->le_connection_scan_interval = conn_scan_interval; 4974 hci_stack->le_connection_scan_window = conn_scan_window; 4975 hci_stack->le_connection_interval_min = conn_interval_min; 4976 hci_stack->le_connection_interval_max = conn_interval_max; 4977 hci_stack->le_connection_latency = conn_latency; 4978 hci_stack->le_supervision_timeout = supervision_timeout; 4979 hci_stack->le_minimum_ce_length = min_ce_length; 4980 hci_stack->le_maximum_ce_length = max_ce_length; 4981 } 4982 #endif 4983 4984 /** 4985 * @brief Updates the connection parameters for a given LE connection 4986 * @param handle 4987 * @param conn_interval_min (unit: 1.25ms) 4988 * @param conn_interval_max (unit: 1.25ms) 4989 * @param conn_latency 4990 * @param supervision_timeout (unit: 10ms) 4991 * @returns 0 if ok 4992 */ 4993 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4994 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4995 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4996 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4997 connection->le_conn_interval_min = conn_interval_min; 4998 connection->le_conn_interval_max = conn_interval_max; 4999 connection->le_conn_latency = conn_latency; 5000 connection->le_supervision_timeout = supervision_timeout; 5001 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5002 hci_run(); 5003 return 0; 5004 } 5005 5006 /** 5007 * @brief Request an update of the connection parameter for a given LE connection 5008 * @param handle 5009 * @param conn_interval_min (unit: 1.25ms) 5010 * @param conn_interval_max (unit: 1.25ms) 5011 * @param conn_latency 5012 * @param supervision_timeout (unit: 10ms) 5013 * @returns 0 if ok 5014 */ 5015 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5016 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5017 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5018 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5019 connection->le_conn_interval_min = conn_interval_min; 5020 connection->le_conn_interval_max = conn_interval_max; 5021 connection->le_conn_latency = conn_latency; 5022 connection->le_supervision_timeout = supervision_timeout; 5023 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5024 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5025 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5026 return 0; 5027 } 5028 5029 #ifdef ENABLE_LE_PERIPHERAL 5030 5031 static void gap_advertisments_changed(void){ 5032 // disable advertisements before updating adv, scan data, or adv params 5033 if (hci_stack->le_advertisements_active){ 5034 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 5035 } 5036 hci_run(); 5037 } 5038 5039 /** 5040 * @brief Set Advertisement Data 5041 * @param advertising_data_length 5042 * @param advertising_data (max 31 octets) 5043 * @note data is not copied, pointer has to stay valid 5044 */ 5045 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5046 hci_stack->le_advertisements_data_len = advertising_data_length; 5047 hci_stack->le_advertisements_data = advertising_data; 5048 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5049 gap_advertisments_changed(); 5050 } 5051 5052 /** 5053 * @brief Set Scan Response Data 5054 * @param advertising_data_length 5055 * @param advertising_data (max 31 octets) 5056 * @note data is not copied, pointer has to stay valid 5057 */ 5058 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5059 hci_stack->le_scan_response_data_len = scan_response_data_length; 5060 hci_stack->le_scan_response_data = scan_response_data; 5061 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5062 gap_advertisments_changed(); 5063 } 5064 5065 /** 5066 * @brief Set Advertisement Parameters 5067 * @param adv_int_min 5068 * @param adv_int_max 5069 * @param adv_type 5070 * @param direct_address_type 5071 * @param direct_address 5072 * @param channel_map 5073 * @param filter_policy 5074 * 5075 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5076 */ 5077 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5078 uint8_t direct_address_typ, bd_addr_t direct_address, 5079 uint8_t channel_map, uint8_t filter_policy) { 5080 5081 hci_stack->le_advertisements_interval_min = adv_int_min; 5082 hci_stack->le_advertisements_interval_max = adv_int_max; 5083 hci_stack->le_advertisements_type = adv_type; 5084 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5085 hci_stack->le_advertisements_channel_map = channel_map; 5086 hci_stack->le_advertisements_filter_policy = filter_policy; 5087 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5088 6); 5089 5090 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5091 gap_advertisments_changed(); 5092 } 5093 5094 /** 5095 * @brief Enable/Disable Advertisements 5096 * @param enabled 5097 */ 5098 void gap_advertisements_enable(int enabled){ 5099 hci_stack->le_advertisements_enabled = enabled; 5100 if (enabled && !hci_stack->le_advertisements_active){ 5101 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 5102 } 5103 if (!enabled && hci_stack->le_advertisements_active){ 5104 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 5105 } 5106 hci_run(); 5107 } 5108 5109 #endif 5110 5111 void hci_le_set_own_address_type(uint8_t own_address_type){ 5112 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5113 if (own_address_type == hci_stack->le_own_addr_type) return; 5114 hci_stack->le_own_addr_type = own_address_type; 5115 5116 #ifdef ENABLE_LE_PERIPHERAL 5117 // update advertisement parameters, too 5118 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5119 gap_advertisments_changed(); 5120 #endif 5121 #ifdef ENABLE_LE_CENTRAL 5122 // note: we don't update scan parameters or modify ongoing connection attempts 5123 #endif 5124 } 5125 5126 #endif 5127 5128 uint8_t gap_disconnect(hci_con_handle_t handle){ 5129 hci_connection_t * conn = hci_connection_for_handle(handle); 5130 if (!conn){ 5131 hci_emit_disconnection_complete(handle, 0); 5132 return 0; 5133 } 5134 // ignore if already disconnected 5135 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5136 return 0; 5137 } 5138 conn->state = SEND_DISCONNECT; 5139 hci_run(); 5140 return 0; 5141 } 5142 5143 int gap_read_rssi(hci_con_handle_t con_handle){ 5144 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5145 if (hci_connection == NULL) return 0; 5146 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5147 hci_run(); 5148 return 1; 5149 } 5150 5151 /** 5152 * @brief Get connection type 5153 * @param con_handle 5154 * @result connection_type 5155 */ 5156 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5157 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5158 if (!conn) return GAP_CONNECTION_INVALID; 5159 switch (conn->address_type){ 5160 case BD_ADDR_TYPE_LE_PUBLIC: 5161 case BD_ADDR_TYPE_LE_RANDOM: 5162 return GAP_CONNECTION_LE; 5163 case BD_ADDR_TYPE_SCO: 5164 return GAP_CONNECTION_SCO; 5165 case BD_ADDR_TYPE_ACL: 5166 return GAP_CONNECTION_ACL; 5167 default: 5168 return GAP_CONNECTION_INVALID; 5169 } 5170 } 5171 5172 #ifdef ENABLE_BLE 5173 5174 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){ 5175 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5176 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5177 5178 conn->le_phy_update_all_phys = all_phys; 5179 conn->le_phy_update_tx_phys = tx_phys; 5180 conn->le_phy_update_rx_phys = rx_phys; 5181 conn->le_phy_update_phy_options = phy_options; 5182 5183 hci_run(); 5184 5185 return 0; 5186 } 5187 5188 #ifdef ENABLE_LE_CENTRAL 5189 /** 5190 * @brief Auto Connection Establishment - Start Connecting to device 5191 * @param address_typ 5192 * @param address 5193 * @returns 0 if ok 5194 */ 5195 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 5196 // check capacity 5197 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 5198 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 5199 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5200 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5201 entry->address_type = address_type; 5202 (void)memcpy(entry->address, address, 6); 5203 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5204 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5205 hci_run(); 5206 return 0; 5207 } 5208 5209 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 5210 btstack_linked_list_iterator_t it; 5211 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5212 while (btstack_linked_list_iterator_has_next(&it)){ 5213 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5214 if (entry->address_type != address_type) continue; 5215 if (memcmp(entry->address, address, 6) != 0) continue; 5216 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5217 // remove from controller if already present 5218 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5219 continue; 5220 } 5221 // direclty remove entry from whitelist 5222 btstack_linked_list_iterator_remove(&it); 5223 btstack_memory_whitelist_entry_free(entry); 5224 } 5225 } 5226 5227 /** 5228 * @brief Auto Connection Establishment - Stop Connecting to device 5229 * @param address_typ 5230 * @param address 5231 * @returns 0 if ok 5232 */ 5233 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 5234 hci_remove_from_whitelist(address_type, address); 5235 hci_run(); 5236 return 0; 5237 } 5238 5239 /** 5240 * @brief Auto Connection Establishment - Stop everything 5241 * @note Convenience function to stop all active auto connection attempts 5242 */ 5243 void gap_auto_connection_stop_all(void){ 5244 btstack_linked_list_iterator_t it; 5245 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5246 while (btstack_linked_list_iterator_has_next(&it)){ 5247 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5248 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5249 // remove from controller if already present 5250 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5251 continue; 5252 } 5253 // directly remove entry from whitelist 5254 btstack_linked_list_iterator_remove(&it); 5255 btstack_memory_whitelist_entry_free(entry); 5256 } 5257 hci_run(); 5258 } 5259 5260 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5261 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5262 if (!conn) return 0; 5263 return conn->le_connection_interval; 5264 } 5265 #endif 5266 #endif 5267 5268 #ifdef ENABLE_CLASSIC 5269 /** 5270 * @brief Set Extended Inquiry Response data 5271 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5272 * @note has to be done before stack starts up 5273 */ 5274 void gap_set_extended_inquiry_response(const uint8_t * data){ 5275 hci_stack->eir_data = data; 5276 } 5277 5278 /** 5279 * @brief Start GAP Classic Inquiry 5280 * @param duration in 1.28s units 5281 * @return 0 if ok 5282 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5283 */ 5284 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5285 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5286 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5287 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5288 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5289 } 5290 hci_stack->inquiry_state = duration_in_1280ms_units; 5291 hci_run(); 5292 return 0; 5293 } 5294 5295 /** 5296 * @brief Stop GAP Classic Inquiry 5297 * @returns 0 if ok 5298 */ 5299 int gap_inquiry_stop(void){ 5300 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5301 // emit inquiry complete event, before it even started 5302 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5303 hci_emit_event(event, sizeof(event), 1); 5304 return 0; 5305 } 5306 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5307 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5308 hci_run(); 5309 return 0; 5310 } 5311 5312 5313 /** 5314 * @brief Remote Name Request 5315 * @param addr 5316 * @param page_scan_repetition_mode 5317 * @param clock_offset only used when bit 15 is set 5318 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5319 */ 5320 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5321 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5322 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5323 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5324 hci_stack->remote_name_clock_offset = clock_offset; 5325 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5326 hci_run(); 5327 return 0; 5328 } 5329 5330 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 5331 hci_stack->gap_pairing_state = state; 5332 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5333 hci_run(); 5334 return 0; 5335 } 5336 5337 /** 5338 * @brief Legacy Pairing Pin Code Response 5339 * @param addr 5340 * @param pin 5341 * @return 0 if ok 5342 */ 5343 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 5344 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5345 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 5346 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5347 } 5348 5349 /** 5350 * @brief Abort Legacy Pairing 5351 * @param addr 5352 * @param pin 5353 * @return 0 if ok 5354 */ 5355 int gap_pin_code_negative(bd_addr_t addr){ 5356 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5357 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5358 } 5359 5360 /** 5361 * @brief SSP Passkey Response 5362 * @param addr 5363 * @param passkey 5364 * @return 0 if ok 5365 */ 5366 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5367 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5368 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5369 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5370 } 5371 5372 /** 5373 * @brief Abort SSP Passkey Entry/Pairing 5374 * @param addr 5375 * @param pin 5376 * @return 0 if ok 5377 */ 5378 int gap_ssp_passkey_negative(bd_addr_t addr){ 5379 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5380 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5381 } 5382 5383 /** 5384 * @brief Accept SSP Numeric Comparison 5385 * @param addr 5386 * @param passkey 5387 * @return 0 if ok 5388 */ 5389 int gap_ssp_confirmation_response(bd_addr_t addr){ 5390 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5391 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5392 } 5393 5394 /** 5395 * @brief Abort SSP Numeric Comparison/Pairing 5396 * @param addr 5397 * @param pin 5398 * @return 0 if ok 5399 */ 5400 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5401 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5402 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5403 } 5404 5405 /** 5406 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5407 * @param inquiry_mode see bluetooth_defines.h 5408 */ 5409 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5410 hci_stack->inquiry_mode = mode; 5411 } 5412 5413 /** 5414 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5415 */ 5416 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5417 hci_stack->sco_voice_setting = voice_setting; 5418 } 5419 5420 /** 5421 * @brief Get SCO Voice Setting 5422 * @return current voice setting 5423 */ 5424 uint16_t hci_get_sco_voice_setting(void){ 5425 return hci_stack->sco_voice_setting; 5426 } 5427 5428 static int hci_have_usb_transport(void){ 5429 if (!hci_stack->hci_transport) return 0; 5430 const char * transport_name = hci_stack->hci_transport->name; 5431 if (!transport_name) return 0; 5432 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5433 } 5434 5435 /** @brief Get SCO packet length for current SCO Voice setting 5436 * @note Using SCO packets of the exact length is required for USB transfer 5437 * @return Length of SCO packets in bytes (not audio frames) 5438 */ 5439 int hci_get_sco_packet_length(void){ 5440 int sco_packet_length = 0; 5441 5442 #ifdef ENABLE_SCO_OVER_HCI 5443 5444 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5445 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5446 5447 if (hci_have_usb_transport()){ 5448 // see Core Spec for H2 USB Transfer. 5449 // 3 byte SCO header + 24 bytes per connection 5450 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5451 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5452 } else { 5453 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5454 sco_packet_length = 3 + 60 * multiplier; 5455 // assert that it still fits inside an SCO buffer 5456 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5457 sco_packet_length = 3 + 60; 5458 } 5459 } 5460 #endif 5461 return sco_packet_length; 5462 } 5463 5464 /** 5465 * @brief Sets the master/slave policy 5466 * @param policy (0: attempt to become master, 1: let connecting device decide) 5467 */ 5468 void hci_set_master_slave_policy(uint8_t policy){ 5469 hci_stack->master_slave_policy = policy; 5470 } 5471 5472 #endif 5473 5474 HCI_STATE hci_get_state(void){ 5475 return hci_stack->state; 5476 } 5477 5478 #ifdef ENABLE_CLASSIC 5479 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5480 hci_stack->gap_classic_accept_callback = accept_callback; 5481 } 5482 #endif 5483 5484 /** 5485 * @brief Set callback for Bluetooth Hardware Error 5486 */ 5487 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5488 hci_stack->hardware_error_callback = fn; 5489 } 5490 5491 void hci_disconnect_all(void){ 5492 btstack_linked_list_iterator_t it; 5493 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5494 while (btstack_linked_list_iterator_has_next(&it)){ 5495 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5496 if (con->state == SENT_DISCONNECT) continue; 5497 con->state = SEND_DISCONNECT; 5498 } 5499 hci_run(); 5500 } 5501 5502 uint16_t hci_get_manufacturer(void){ 5503 return hci_stack->manufacturer; 5504 } 5505 5506 #ifdef ENABLE_BLE 5507 5508 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5509 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5510 if (!hci_con) return NULL; 5511 return &hci_con->sm_connection; 5512 } 5513 5514 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5515 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5516 5517 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5518 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5519 if (hci_connection == NULL) return 0; 5520 if (hci_is_le_connection(hci_connection)){ 5521 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5522 if (sm_conn->sm_connection_encrypted) { 5523 return sm_conn->sm_actual_encryption_key_size; 5524 } 5525 } 5526 #ifdef ENABLE_CLASSIC 5527 else { 5528 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5529 return hci_connection->encryption_key_size; 5530 } 5531 } 5532 #endif 5533 return 0; 5534 } 5535 5536 int gap_authenticated(hci_con_handle_t con_handle){ 5537 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5538 if (hci_connection == NULL) return 0; 5539 5540 switch (hci_connection->address_type){ 5541 case BD_ADDR_TYPE_LE_PUBLIC: 5542 case BD_ADDR_TYPE_LE_RANDOM: 5543 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5544 return hci_connection->sm_connection.sm_connection_authenticated; 5545 #ifdef ENABLE_CLASSIC 5546 case BD_ADDR_TYPE_SCO: 5547 case BD_ADDR_TYPE_ACL: 5548 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5549 #endif 5550 default: 5551 return 0; 5552 } 5553 } 5554 5555 int gap_secure_connection(hci_con_handle_t con_handle){ 5556 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5557 if (hci_connection == NULL) return 0; 5558 5559 switch (hci_connection->address_type){ 5560 case BD_ADDR_TYPE_LE_PUBLIC: 5561 case BD_ADDR_TYPE_LE_RANDOM: 5562 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5563 return hci_connection->sm_connection.sm_connection_sc; 5564 #ifdef ENABLE_CLASSIC 5565 case BD_ADDR_TYPE_SCO: 5566 case BD_ADDR_TYPE_ACL: 5567 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5568 #endif 5569 default: 5570 return 0; 5571 } 5572 } 5573 5574 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5575 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5576 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5577 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5578 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5579 return sm_conn->sm_connection_authorization_state; 5580 } 5581 #endif 5582 5583 #ifdef ENABLE_CLASSIC 5584 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){ 5585 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5586 if (!conn) return GAP_CONNECTION_INVALID; 5587 conn->sniff_min_interval = sniff_min_interval; 5588 conn->sniff_max_interval = sniff_max_interval; 5589 conn->sniff_attempt = sniff_attempt; 5590 conn->sniff_timeout = sniff_timeout; 5591 hci_run(); 5592 return 0; 5593 } 5594 5595 /** 5596 * @brief Exit Sniff mode 5597 * @param con_handle 5598 @ @return 0 if ok 5599 */ 5600 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5601 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5602 if (!conn) return GAP_CONNECTION_INVALID; 5603 conn->sniff_min_interval = 0xffff; 5604 hci_run(); 5605 return 0; 5606 } 5607 #endif 5608 5609 void hci_halting_defer(void){ 5610 if (hci_stack->state != HCI_STATE_HALTING) return; 5611 switch (hci_stack->substate){ 5612 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5613 case HCI_HALTING_CLOSE: 5614 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5615 break; 5616 default: 5617 break; 5618 } 5619 } 5620 5621 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 5622 void hci_setup_test_connections_fuzz(void){ 5623 hci_connection_t * conn; 5624 5625 // default address: 66:55:44:33:00:01 5626 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 5627 5628 // setup Controller info 5629 hci_stack->num_cmd_packets = 255; 5630 hci_stack->acl_packets_total_num = 255; 5631 5632 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 5633 addr[5] = 0x01; 5634 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5635 conn->con_handle = addr[5]; 5636 conn->role = HCI_ROLE_SLAVE; 5637 conn->state = RECEIVED_CONNECTION_REQUEST; 5638 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5639 5640 // setup incoming Classic SCO connection with con handle 0x0002 5641 addr[5] = 0x02; 5642 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5643 conn->con_handle = addr[5]; 5644 conn->role = HCI_ROLE_SLAVE; 5645 conn->state = RECEIVED_CONNECTION_REQUEST; 5646 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5647 5648 // setup ready Classic ACL connection with con handle 0x0003 5649 addr[5] = 0x03; 5650 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5651 conn->con_handle = addr[5]; 5652 conn->role = HCI_ROLE_SLAVE; 5653 conn->state = OPEN; 5654 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5655 5656 // setup ready Classic SCO connection with con handle 0x0004 5657 addr[5] = 0x04; 5658 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5659 conn->con_handle = addr[5]; 5660 conn->role = HCI_ROLE_SLAVE; 5661 conn->state = OPEN; 5662 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5663 5664 // setup ready LE ACL connection with con handle 0x005 and public address 5665 addr[5] = 0x05; 5666 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 5667 conn->con_handle = addr[5]; 5668 conn->role = HCI_ROLE_SLAVE; 5669 conn->state = OPEN; 5670 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5671 } 5672 5673 void hci_free_connections_fuzz(void){ 5674 btstack_linked_list_iterator_t it; 5675 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5676 while (btstack_linked_list_iterator_has_next(&it)){ 5677 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5678 btstack_linked_list_iterator_remove(&it); 5679 btstack_memory_hci_connection_free(con); 5680 } 5681 } 5682 void hci_simulate_working_fuzz(void){ 5683 hci_init_done(); 5684 hci_stack->num_cmd_packets = 255; 5685 } 5686 #endif 5687