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 UNUSED(size); 1983 1984 uint16_t manufacturer; 1985 #ifdef ENABLE_CLASSIC 1986 hci_con_handle_t handle; 1987 hci_connection_t * conn; 1988 uint8_t status; 1989 #endif 1990 // get num cmd packets - limit to 1 to reduce complexity 1991 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1992 1993 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 1994 switch (opcode){ 1995 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 1996 if (packet[5]) break; 1997 // terminate, name 248 chars 1998 packet[6+248] = 0; 1999 log_info("local name: %s", &packet[6]); 2000 break; 2001 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2002 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2003 if (hci_stack->state != HCI_STATE_INITIALIZING) break; 2004 uint16_t acl_len = little_endian_read_16(packet, 6); 2005 uint16_t sco_len = packet[8]; 2006 2007 // determine usable ACL/SCO payload size 2008 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2009 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2010 2011 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2012 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2013 2014 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2015 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2016 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2017 break; 2018 case HCI_OPCODE_HCI_READ_RSSI: 2019 if (packet[5] == ERROR_CODE_SUCCESS){ 2020 uint8_t event[5]; 2021 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2022 event[1] = 3; 2023 (void)memcpy(&event[2], &packet[6], 3); 2024 hci_emit_event(event, sizeof(event), 1); 2025 } 2026 break; 2027 #ifdef ENABLE_BLE 2028 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2029 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2030 hci_stack->le_acl_packets_total_num = packet[8]; 2031 // determine usable ACL payload size 2032 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2033 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2034 } 2035 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2036 break; 2037 #endif 2038 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2039 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2040 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2041 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2042 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); 2043 break; 2044 #endif 2045 #ifdef ENABLE_LE_CENTRAL 2046 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2047 hci_stack->le_whitelist_capacity = packet[6]; 2048 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2049 break; 2050 #endif 2051 case HCI_OPCODE_HCI_READ_BD_ADDR: 2052 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2053 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)); 2054 #ifdef ENABLE_CLASSIC 2055 if (hci_stack->link_key_db){ 2056 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2057 } 2058 #endif 2059 break; 2060 #ifdef ENABLE_CLASSIC 2061 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2062 hci_emit_discoverable_enabled(hci_stack->discoverable); 2063 break; 2064 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2065 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2066 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2067 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2068 hci_emit_event(event, sizeof(event), 1); 2069 } 2070 break; 2071 #endif 2072 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2073 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2074 2075 #ifdef ENABLE_CLASSIC 2076 // determine usable ACL packet types based on host buffer size and supported features 2077 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2078 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2079 #endif 2080 // Classic/LE 2081 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2082 break; 2083 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2084 manufacturer = little_endian_read_16(packet, 10); 2085 // map Cypress to Broadcom 2086 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2087 log_info("Treat Cypress as Broadcom"); 2088 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2089 little_endian_store_16(packet, 10, manufacturer); 2090 } 2091 hci_stack->manufacturer = manufacturer; 2092 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2093 break; 2094 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2095 hci_stack->local_supported_commands[0] = 2096 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2097 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2098 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2099 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2100 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2101 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2102 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2103 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+20] & 0x10) << 3); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2104 hci_stack->local_supported_commands[1] = 2105 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+ 2] & 0x40) >> 6) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2106 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+32] & 0x08) >> 2); // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2107 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2108 break; 2109 #ifdef ENABLE_CLASSIC 2110 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2111 if (packet[5]) return; 2112 hci_stack->synchronous_flow_control_enabled = 1; 2113 break; 2114 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2115 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2116 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2117 conn = hci_connection_for_handle(handle); 2118 if (!conn) return; 2119 uint8_t key_size = 0; 2120 if (status == 0){ 2121 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2122 log_info("Handle %x04x key Size: %u", handle, key_size); 2123 } else { 2124 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2125 } 2126 hci_handle_read_encryption_key_size_complete(conn, key_size); 2127 break; 2128 #endif 2129 default: 2130 break; 2131 } 2132 } 2133 2134 static void event_handler(uint8_t *packet, int size){ 2135 2136 uint16_t event_length = packet[1]; 2137 2138 // assert packet is complete 2139 if (size != (event_length + 2)){ 2140 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2141 return; 2142 } 2143 2144 bd_addr_t addr; 2145 bd_addr_type_t addr_type; 2146 hci_con_handle_t handle; 2147 hci_connection_t * conn; 2148 int i; 2149 int create_connection_cmd; 2150 2151 #ifdef ENABLE_CLASSIC 2152 uint8_t link_type; 2153 #endif 2154 2155 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2156 2157 switch (hci_event_packet_get_type(packet)) { 2158 2159 case HCI_EVENT_COMMAND_COMPLETE: 2160 handle_command_complete_event(packet, size); 2161 break; 2162 2163 case HCI_EVENT_COMMAND_STATUS: 2164 // get num cmd packets - limit to 1 to reduce complexity 2165 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2166 2167 // check command status to detected failed outgoing connections 2168 create_connection_cmd = 0; 2169 #ifdef ENABLE_CLASSIC 2170 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2171 create_connection_cmd = 1; 2172 } 2173 #endif 2174 #ifdef ENABLE_LE_CENTRAL 2175 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2176 create_connection_cmd = 1; 2177 } 2178 #endif 2179 if (create_connection_cmd) { 2180 uint8_t status = hci_event_command_status_get_status(packet); 2181 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2182 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); 2183 2184 // reset outgoing address info 2185 memset(hci_stack->outgoing_addr, 0, 6); 2186 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2187 2188 // error => outgoing connection failed 2189 if ((conn != NULL) && (status != 0)){ 2190 hci_handle_connection_failed(conn, status); 2191 } 2192 } 2193 break; 2194 2195 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2196 if (size < 3) return; 2197 uint16_t num_handles = packet[2]; 2198 if (size != (3 + num_handles * 4)) return; 2199 uint16_t offset = 3; 2200 for (i=0; i<num_handles;i++){ 2201 handle = little_endian_read_16(packet, offset) & 0x0fff; 2202 offset += 2; 2203 uint16_t num_packets = little_endian_read_16(packet, offset); 2204 offset += 2; 2205 2206 conn = hci_connection_for_handle(handle); 2207 if (!conn){ 2208 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2209 continue; 2210 } 2211 2212 if (conn->num_packets_sent >= num_packets){ 2213 conn->num_packets_sent -= num_packets; 2214 } else { 2215 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2216 conn->num_packets_sent = 0; 2217 } 2218 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2219 2220 #ifdef ENABLE_CLASSIC 2221 // For SCO, we do the can_send_now_check here 2222 hci_notify_if_sco_can_send_now(); 2223 #endif 2224 } 2225 break; 2226 } 2227 2228 #ifdef ENABLE_CLASSIC 2229 case HCI_EVENT_INQUIRY_COMPLETE: 2230 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2231 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2232 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2233 hci_emit_event(event, sizeof(event), 1); 2234 } 2235 break; 2236 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2237 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2238 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2239 } 2240 break; 2241 case HCI_EVENT_CONNECTION_REQUEST: 2242 reverse_bd_addr(&packet[2], addr); 2243 if (hci_stack->gap_classic_accept_callback != NULL){ 2244 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2245 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2246 bd_addr_copy(hci_stack->decline_addr, addr); 2247 break; 2248 } 2249 } 2250 2251 // TODO: eval COD 8-10 2252 link_type = packet[11]; 2253 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2254 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2255 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2256 if (!conn) { 2257 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2258 } 2259 if (!conn) { 2260 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2261 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2262 bd_addr_copy(hci_stack->decline_addr, addr); 2263 break; 2264 } 2265 conn->role = HCI_ROLE_SLAVE; 2266 conn->state = RECEIVED_CONNECTION_REQUEST; 2267 // store info about eSCO 2268 if (link_type == 0x02){ 2269 conn->remote_supported_features[0] |= 1; 2270 } 2271 hci_run(); 2272 break; 2273 2274 case HCI_EVENT_CONNECTION_COMPLETE: 2275 // Connection management 2276 reverse_bd_addr(&packet[5], addr); 2277 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2278 addr_type = BD_ADDR_TYPE_ACL; 2279 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2280 if (conn) { 2281 if (!packet[2]){ 2282 conn->state = OPEN; 2283 conn->con_handle = little_endian_read_16(packet, 3); 2284 2285 // queue get remote feature 2286 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2287 2288 // queue set supervision timeout if we're master 2289 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2290 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2291 } 2292 2293 // restart timer 2294 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2295 btstack_run_loop_add_timer(&conn->timeout); 2296 2297 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2298 2299 hci_emit_nr_connections_changed(); 2300 } else { 2301 // connection failed 2302 hci_handle_connection_failed(conn, packet[2]); 2303 } 2304 } 2305 break; 2306 2307 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2308 reverse_bd_addr(&packet[5], addr); 2309 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2310 if (packet[2]){ 2311 // connection failed 2312 break; 2313 } 2314 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2315 if (!conn) { 2316 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2317 } 2318 if (!conn) { 2319 break; 2320 } 2321 conn->state = OPEN; 2322 conn->con_handle = little_endian_read_16(packet, 3); 2323 2324 #ifdef ENABLE_SCO_OVER_HCI 2325 // update SCO 2326 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2327 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2328 } 2329 // trigger can send now 2330 if (hci_have_usb_transport()){ 2331 hci_stack->sco_can_send_now = 1; 2332 } 2333 #endif 2334 break; 2335 2336 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2337 handle = little_endian_read_16(packet, 3); 2338 conn = hci_connection_for_handle(handle); 2339 if (!conn) break; 2340 if (!packet[2]){ 2341 const uint8_t * features = &packet[5]; 2342 hci_handle_remote_features_page_0(conn, features); 2343 2344 // read extended features if possible 2345 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2346 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2347 break; 2348 } 2349 } 2350 hci_handle_remote_features_received(conn); 2351 break; 2352 2353 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2354 handle = little_endian_read_16(packet, 3); 2355 conn = hci_connection_for_handle(handle); 2356 if (!conn) break; 2357 // status = ok, page = 1 2358 if (!packet[2]) { 2359 uint8_t page_number = packet[5]; 2360 uint8_t maximum_page_number = packet[6]; 2361 const uint8_t * features = &packet[7]; 2362 bool done = false; 2363 switch (page_number){ 2364 case 1: 2365 hci_handle_remote_features_page_1(conn, features); 2366 if (maximum_page_number >= 2){ 2367 // get Secure Connections (Controller) from Page 2 if available 2368 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2369 } else { 2370 // otherwise, assume SC (Controller) == SC (Host) 2371 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2372 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2373 } 2374 done = true; 2375 } 2376 break; 2377 case 2: 2378 hci_handle_remote_features_page_2(conn, features); 2379 done = true; 2380 break; 2381 default: 2382 break; 2383 } 2384 if (!done) break; 2385 } 2386 hci_handle_remote_features_received(conn); 2387 break; 2388 2389 case HCI_EVENT_LINK_KEY_REQUEST: 2390 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2391 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2392 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2393 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2394 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2395 hci_run(); 2396 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2397 return; 2398 2399 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2400 reverse_bd_addr(&packet[2], addr); 2401 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2402 if (!conn) break; 2403 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2404 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2405 // Change Connection Encryption keeps link key type 2406 if (link_key_type != CHANGED_COMBINATION_KEY){ 2407 conn->link_key_type = link_key_type; 2408 } 2409 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2410 // still forward event to allow dismiss of pairing dialog 2411 break; 2412 } 2413 2414 case HCI_EVENT_PIN_CODE_REQUEST: 2415 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2416 // non-bondable mode: pin code negative reply will be sent 2417 if (!hci_stack->bondable){ 2418 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2419 hci_run(); 2420 return; 2421 } 2422 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2423 if (!hci_stack->link_key_db) break; 2424 hci_event_pin_code_request_get_bd_addr(packet, addr); 2425 hci_stack->link_key_db->delete_link_key(addr); 2426 break; 2427 2428 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2429 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2430 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2431 break; 2432 2433 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2434 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2435 if (!hci_stack->ssp_auto_accept) break; 2436 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2437 break; 2438 2439 case HCI_EVENT_USER_PASSKEY_REQUEST: 2440 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2441 if (!hci_stack->ssp_auto_accept) break; 2442 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2443 break; 2444 case HCI_EVENT_MODE_CHANGE: 2445 handle = hci_event_mode_change_get_handle(packet); 2446 conn = hci_connection_for_handle(handle); 2447 if (!conn) break; 2448 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2449 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2450 break; 2451 #endif 2452 2453 case HCI_EVENT_ENCRYPTION_CHANGE: 2454 handle = hci_event_encryption_change_get_connection_handle(packet); 2455 conn = hci_connection_for_handle(handle); 2456 if (!conn) break; 2457 if (hci_event_encryption_change_get_status(packet) == 0) { 2458 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2459 if (encryption_enabled){ 2460 if (hci_is_le_connection(conn)){ 2461 // For LE, we accept connection as encrypted 2462 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2463 } 2464 #ifdef ENABLE_CLASSIC 2465 else { 2466 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2467 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2468 bool connected_uses_aes_ccm = encryption_enabled == 2; 2469 if (sc_used_during_pairing && !connected_uses_aes_ccm){ 2470 log_info("SC during pairing, but only E0 now -> abort"); 2471 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2472 break; 2473 } 2474 2475 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2476 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2477 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2478 } else { 2479 // if not, pretend everything is perfect 2480 hci_handle_read_encryption_key_size_complete(conn, 16); 2481 } 2482 } 2483 #endif 2484 } else { 2485 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2486 } 2487 } 2488 2489 break; 2490 2491 #ifdef ENABLE_CLASSIC 2492 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2493 handle = hci_event_authentication_complete_get_connection_handle(packet); 2494 conn = hci_connection_for_handle(handle); 2495 if (!conn) break; 2496 2497 // ignore authentication event if we didn't request it 2498 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2499 2500 // dedicated bonding: send result and disconnect 2501 if (conn->bonding_flags & BONDING_DEDICATED){ 2502 conn->bonding_flags &= ~BONDING_DEDICATED; 2503 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2504 conn->bonding_status = packet[2]; 2505 break; 2506 } 2507 2508 // authenticated only if auth status == 0 2509 if (hci_event_authentication_complete_get_status(packet) == 0){ 2510 // authenticated 2511 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2512 2513 // If link key sufficient for requested security and not already encrypted, start encryption 2514 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2515 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2516 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2517 break; 2518 } 2519 } 2520 2521 // emit updated security level 2522 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2523 break; 2524 #endif 2525 2526 // HCI_EVENT_DISCONNECTION_COMPLETE 2527 // has been split, to first notify stack before shutting connection down 2528 // see end of function, too. 2529 case HCI_EVENT_DISCONNECTION_COMPLETE: 2530 if (packet[2]) break; // status != 0 2531 handle = little_endian_read_16(packet, 3); 2532 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2533 if (hci_stack->acl_fragmentation_total_size > 0) { 2534 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2535 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2536 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2537 hci_stack->acl_fragmentation_total_size = 0; 2538 hci_stack->acl_fragmentation_pos = 0; 2539 if (release_buffer){ 2540 hci_release_packet_buffer(); 2541 } 2542 } 2543 } 2544 2545 conn = hci_connection_for_handle(handle); 2546 if (!conn) break; 2547 // mark connection for shutdown 2548 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2549 2550 // emit dedicatd bonding event 2551 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2552 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2553 } 2554 2555 #ifdef ENABLE_BLE 2556 #ifdef ENABLE_LE_PERIPHERAL 2557 // re-enable advertisements for le connections if active 2558 if (hci_is_le_connection(conn)){ 2559 hci_reenable_advertisements_if_needed(); 2560 } 2561 #endif 2562 #endif 2563 break; 2564 2565 case HCI_EVENT_HARDWARE_ERROR: 2566 log_error("Hardware Error: 0x%02x", packet[2]); 2567 if (hci_stack->hardware_error_callback){ 2568 (*hci_stack->hardware_error_callback)(packet[2]); 2569 } else { 2570 // if no special requests, just reboot stack 2571 hci_power_control_off(); 2572 hci_power_control_on(); 2573 } 2574 break; 2575 2576 #ifdef ENABLE_CLASSIC 2577 case HCI_EVENT_ROLE_CHANGE: 2578 if (packet[2]) break; // status != 0 2579 reverse_bd_addr(&packet[3], addr); 2580 addr_type = BD_ADDR_TYPE_ACL; 2581 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2582 if (!conn) break; 2583 conn->role = packet[9]; 2584 break; 2585 #endif 2586 2587 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2588 // release packet buffer only for asynchronous transport and if there are not further fragements 2589 if (hci_transport_synchronous()) { 2590 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2591 return; // instead of break: to avoid re-entering hci_run() 2592 } 2593 hci_stack->acl_fragmentation_tx_active = 0; 2594 if (hci_stack->acl_fragmentation_total_size) break; 2595 hci_release_packet_buffer(); 2596 2597 // L2CAP receives this event via the hci_emit_event below 2598 2599 #ifdef ENABLE_CLASSIC 2600 // For SCO, we do the can_send_now_check here 2601 hci_notify_if_sco_can_send_now(); 2602 #endif 2603 break; 2604 2605 #ifdef ENABLE_CLASSIC 2606 case HCI_EVENT_SCO_CAN_SEND_NOW: 2607 // For SCO, we do the can_send_now_check here 2608 hci_stack->sco_can_send_now = 1; 2609 hci_notify_if_sco_can_send_now(); 2610 return; 2611 2612 // explode inquriy results for easier consumption 2613 case HCI_EVENT_INQUIRY_RESULT: 2614 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2615 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2616 gap_inquiry_explode(packet, size); 2617 break; 2618 #endif 2619 2620 #ifdef ENABLE_BLE 2621 case HCI_EVENT_LE_META: 2622 switch (packet[2]){ 2623 #ifdef ENABLE_LE_CENTRAL 2624 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2625 // log_info("advertising report received"); 2626 if (!hci_stack->le_scanning_enabled) break; 2627 le_handle_advertisement_report(packet, size); 2628 break; 2629 #endif 2630 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2631 // Connection management 2632 reverse_bd_addr(&packet[8], addr); 2633 addr_type = (bd_addr_type_t)packet[7]; 2634 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2635 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2636 2637 #ifdef ENABLE_LE_CENTRAL 2638 // if auto-connect, remove from whitelist in both roles 2639 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2640 hci_remove_from_whitelist(addr_type, addr); 2641 } 2642 // handle error: error is reported only to the initiator -> outgoing connection 2643 if (packet[3]){ 2644 2645 // handle cancelled outgoing connection 2646 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2647 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2648 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2649 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2650 conn = gap_get_outgoing_connection(); 2651 } 2652 2653 // outgoing connection establishment is done 2654 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2655 // remove entry 2656 if (conn){ 2657 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2658 btstack_memory_hci_connection_free( conn ); 2659 } 2660 break; 2661 } 2662 #endif 2663 // on success, both hosts receive connection complete event 2664 if (packet[6] == HCI_ROLE_MASTER){ 2665 #ifdef ENABLE_LE_CENTRAL 2666 // if we're master, it was an outgoing connection and we're done with it 2667 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2668 #endif 2669 } else { 2670 #ifdef ENABLE_LE_PERIPHERAL 2671 // if we're slave, it was an incoming connection, advertisements have stopped 2672 hci_stack->le_advertisements_active = 0; 2673 #endif 2674 } 2675 // LE connections are auto-accepted, so just create a connection if there isn't one already 2676 if (!conn){ 2677 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2678 } 2679 // no memory, sorry. 2680 if (!conn){ 2681 break; 2682 } 2683 2684 conn->state = OPEN; 2685 conn->role = packet[6]; 2686 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2687 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2688 2689 #ifdef ENABLE_LE_PERIPHERAL 2690 if (packet[6] == HCI_ROLE_SLAVE){ 2691 hci_reenable_advertisements_if_needed(); 2692 } 2693 #endif 2694 2695 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2696 2697 // restart timer 2698 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2699 // btstack_run_loop_add_timer(&conn->timeout); 2700 2701 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2702 2703 hci_emit_nr_connections_changed(); 2704 break; 2705 2706 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2707 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2708 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2709 conn = hci_connection_for_handle(handle); 2710 if (!conn) break; 2711 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2712 break; 2713 2714 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2715 // connection 2716 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2717 conn = hci_connection_for_handle(handle); 2718 if (conn) { 2719 // read arguments 2720 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2721 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2722 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2723 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2724 2725 // validate against current connection parameter range 2726 le_connection_parameter_range_t existing_range; 2727 gap_get_connection_parameter_range(&existing_range); 2728 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2729 if (update_parameter){ 2730 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2731 conn->le_conn_interval_min = le_conn_interval_min; 2732 conn->le_conn_interval_max = le_conn_interval_max; 2733 conn->le_conn_latency = le_conn_latency; 2734 conn->le_supervision_timeout = le_supervision_timeout; 2735 } else { 2736 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2737 } 2738 } 2739 break; 2740 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2741 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2742 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2743 conn = hci_connection_for_handle(handle); 2744 if (conn) { 2745 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2746 } 2747 break; 2748 #endif 2749 default: 2750 break; 2751 } 2752 break; 2753 #endif 2754 case HCI_EVENT_VENDOR_SPECIFIC: 2755 // Vendor specific commands often create vendor specific event instead of num completed packets 2756 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2757 switch (hci_stack->manufacturer){ 2758 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2759 hci_stack->num_cmd_packets = 1; 2760 break; 2761 default: 2762 break; 2763 } 2764 break; 2765 default: 2766 break; 2767 } 2768 2769 handle_event_for_current_stack_state(packet, size); 2770 2771 // notify upper stack 2772 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2773 2774 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2775 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2776 if (!packet[2]){ 2777 handle = little_endian_read_16(packet, 3); 2778 hci_connection_t * aConn = hci_connection_for_handle(handle); 2779 if (aConn) { 2780 // discard connection if app did not trigger a reconnect in the event handler 2781 if (aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2782 hci_shutdown_connection(aConn); 2783 } 2784 } 2785 } 2786 } 2787 2788 // execute main loop 2789 hci_run(); 2790 } 2791 2792 #ifdef ENABLE_CLASSIC 2793 2794 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2795 static void sco_schedule_tx(hci_connection_t * conn); 2796 2797 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2798 log_debug("SCO TX Timeout"); 2799 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2800 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2801 if (!conn) return; 2802 2803 // trigger send 2804 conn->sco_tx_ready = 1; 2805 // extra packet if CVSD but SCO buffer is too short 2806 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2807 conn->sco_tx_ready++; 2808 } 2809 hci_notify_if_sco_can_send_now(); 2810 } 2811 2812 2813 #define SCO_TX_AFTER_RX_MS (6) 2814 2815 static void sco_schedule_tx(hci_connection_t * conn){ 2816 2817 uint32_t now = btstack_run_loop_get_time_ms(); 2818 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2819 int time_delta_ms = sco_tx_ms - now; 2820 2821 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2822 2823 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2824 btstack_run_loop_set_timer(timer, time_delta_ms); 2825 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2826 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2827 btstack_run_loop_add_timer(timer); 2828 } 2829 2830 static void sco_handler(uint8_t * packet, uint16_t size){ 2831 // lookup connection struct 2832 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2833 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2834 if (!conn) return; 2835 2836 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2837 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2838 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2839 packet[2] = 0x3c; 2840 memmove(&packet[3], &packet[23], 63); 2841 size = 63; 2842 } 2843 } 2844 2845 if (hci_have_usb_transport()){ 2846 // Nothing to do 2847 } else { 2848 // 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); 2849 if (hci_stack->synchronous_flow_control_enabled == 0){ 2850 uint32_t now = btstack_run_loop_get_time_ms(); 2851 2852 if (!conn->sco_rx_valid){ 2853 // ignore first 10 packets 2854 conn->sco_rx_count++; 2855 // log_debug("sco rx count %u", conn->sco_rx_count); 2856 if (conn->sco_rx_count == 10) { 2857 // use first timestamp as is and pretent it just started 2858 conn->sco_rx_ms = now; 2859 conn->sco_rx_valid = 1; 2860 conn->sco_rx_count = 0; 2861 sco_schedule_tx(conn); 2862 } 2863 } else { 2864 // track expected arrival timme 2865 conn->sco_rx_count++; 2866 conn->sco_rx_ms += 7; 2867 int delta = (int32_t) (now - conn->sco_rx_ms); 2868 if (delta > 0){ 2869 conn->sco_rx_ms++; 2870 } 2871 // log_debug("sco rx %u", conn->sco_rx_ms); 2872 sco_schedule_tx(conn); 2873 } 2874 } 2875 } 2876 // deliver to app 2877 if (hci_stack->sco_packet_handler) { 2878 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2879 } 2880 2881 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2882 conn->num_packets_completed++; 2883 hci_stack->host_completed_packets = 1; 2884 hci_run(); 2885 #endif 2886 } 2887 #endif 2888 2889 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2890 hci_dump_packet(packet_type, 1, packet, size); 2891 switch (packet_type) { 2892 case HCI_EVENT_PACKET: 2893 event_handler(packet, size); 2894 break; 2895 case HCI_ACL_DATA_PACKET: 2896 acl_handler(packet, size); 2897 break; 2898 #ifdef ENABLE_CLASSIC 2899 case HCI_SCO_DATA_PACKET: 2900 sco_handler(packet, size); 2901 break; 2902 #endif 2903 default: 2904 break; 2905 } 2906 } 2907 2908 /** 2909 * @brief Add event packet handler. 2910 */ 2911 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2912 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2913 } 2914 2915 2916 /** Register HCI packet handlers */ 2917 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2918 hci_stack->acl_packet_handler = handler; 2919 } 2920 2921 #ifdef ENABLE_CLASSIC 2922 /** 2923 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2924 */ 2925 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2926 hci_stack->sco_packet_handler = handler; 2927 } 2928 #endif 2929 2930 static void hci_state_reset(void){ 2931 // no connections yet 2932 hci_stack->connections = NULL; 2933 2934 // keep discoverable/connectable as this has been requested by the client(s) 2935 // hci_stack->discoverable = 0; 2936 // hci_stack->connectable = 0; 2937 // hci_stack->bondable = 1; 2938 // hci_stack->own_addr_type = 0; 2939 2940 // buffer is free 2941 hci_stack->hci_packet_buffer_reserved = 0; 2942 2943 // no pending cmds 2944 hci_stack->decline_reason = 0; 2945 hci_stack->new_scan_enable_value = 0xff; 2946 2947 // LE 2948 #ifdef ENABLE_BLE 2949 memset(hci_stack->le_random_address, 0, 6); 2950 hci_stack->le_random_address_set = 0; 2951 #endif 2952 #ifdef ENABLE_LE_CENTRAL 2953 hci_stack->le_scanning_active = 0; 2954 hci_stack->le_scan_type = 0xff; 2955 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2956 hci_stack->le_whitelist = 0; 2957 hci_stack->le_whitelist_capacity = 0; 2958 #endif 2959 } 2960 2961 #ifdef ENABLE_CLASSIC 2962 /** 2963 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2964 */ 2965 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2966 // store and open remote device db 2967 hci_stack->link_key_db = link_key_db; 2968 if (hci_stack->link_key_db) { 2969 hci_stack->link_key_db->open(); 2970 } 2971 } 2972 #endif 2973 2974 void hci_init(const hci_transport_t *transport, const void *config){ 2975 2976 #ifdef HAVE_MALLOC 2977 if (!hci_stack) { 2978 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2979 } 2980 #else 2981 hci_stack = &hci_stack_static; 2982 #endif 2983 memset(hci_stack, 0, sizeof(hci_stack_t)); 2984 2985 // reference to use transport layer implementation 2986 hci_stack->hci_transport = transport; 2987 2988 // reference to used config 2989 hci_stack->config = config; 2990 2991 // setup pointer for outgoing packet buffer 2992 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2993 2994 // max acl payload size defined in config.h 2995 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2996 2997 // register packet handlers with transport 2998 transport->register_packet_handler(&packet_handler); 2999 3000 hci_stack->state = HCI_STATE_OFF; 3001 3002 // class of device 3003 hci_stack->class_of_device = 0x007a020c; // Smartphone 3004 3005 // bondable by default 3006 hci_stack->bondable = 1; 3007 3008 #ifdef ENABLE_CLASSIC 3009 // classic name 3010 hci_stack->local_name = default_classic_name; 3011 3012 // Master slave policy 3013 hci_stack->master_slave_policy = 1; 3014 3015 // Allow Role Switch 3016 hci_stack->allow_role_switch = 1; 3017 3018 // Default / minimum security level = 2 3019 hci_stack->gap_security_level = LEVEL_2; 3020 3021 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3022 hci_stack->gap_required_encyrption_key_size = 7; 3023 #endif 3024 3025 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3026 hci_stack->ssp_enable = 1; 3027 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3028 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3029 hci_stack->ssp_auto_accept = 1; 3030 3031 // Secure Connections: enable (requires support from Controller) 3032 hci_stack->secure_connections_enable = true; 3033 3034 // voice setting - signed 16 bit pcm data with CVSD over the air 3035 hci_stack->sco_voice_setting = 0x60; 3036 3037 #ifdef ENABLE_LE_CENTRAL 3038 // connection parameter to use for outgoing connections 3039 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3040 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3041 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3042 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3043 hci_stack->le_connection_latency = 4; // 4 3044 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3045 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3046 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3047 3048 // default LE Scanning 3049 hci_stack->le_scan_interval = 0x1e0; 3050 hci_stack->le_scan_window = 0x30; 3051 #endif 3052 3053 #ifdef ENABLE_LE_PERIPHERAL 3054 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3055 #endif 3056 3057 // connection parameter range used to answer connection parameter update requests in l2cap 3058 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3059 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3060 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3061 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3062 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3063 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3064 3065 hci_state_reset(); 3066 } 3067 3068 /** 3069 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3070 */ 3071 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3072 hci_stack->chipset = chipset_driver; 3073 3074 // reset chipset driver - init is also called on power_up 3075 if (hci_stack->chipset && hci_stack->chipset->init){ 3076 hci_stack->chipset->init(hci_stack->config); 3077 } 3078 } 3079 3080 /** 3081 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3082 */ 3083 void hci_set_control(const btstack_control_t *hardware_control){ 3084 // references to used control implementation 3085 hci_stack->control = hardware_control; 3086 // init with transport config 3087 hardware_control->init(hci_stack->config); 3088 } 3089 3090 void hci_close(void){ 3091 // close remote device db 3092 if (hci_stack->link_key_db) { 3093 hci_stack->link_key_db->close(); 3094 } 3095 3096 btstack_linked_list_iterator_t lit; 3097 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3098 while (btstack_linked_list_iterator_has_next(&lit)){ 3099 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3100 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3101 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3102 hci_shutdown_connection(connection); 3103 } 3104 3105 hci_power_control(HCI_POWER_OFF); 3106 3107 #ifdef HAVE_MALLOC 3108 free(hci_stack); 3109 #endif 3110 hci_stack = NULL; 3111 } 3112 3113 #ifdef ENABLE_CLASSIC 3114 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3115 // validate ranage and set 3116 if (encryption_key_size < 7) return; 3117 if (encryption_key_size > 16) return; 3118 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3119 } 3120 3121 void gap_set_security_level(gap_security_level_t security_level){ 3122 hci_stack->gap_security_level = security_level; 3123 } 3124 3125 gap_security_level_t gap_get_security_level(void){ 3126 return hci_stack->gap_security_level; 3127 } 3128 #endif 3129 3130 #ifdef ENABLE_CLASSIC 3131 void gap_set_class_of_device(uint32_t class_of_device){ 3132 hci_stack->class_of_device = class_of_device; 3133 } 3134 3135 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3136 hci_stack->default_link_policy_settings = default_link_policy_settings; 3137 } 3138 3139 void gap_set_allow_role_switch(bool allow_role_switch){ 3140 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3141 } 3142 3143 uint8_t hci_get_allow_role_switch(void){ 3144 return hci_stack->allow_role_switch; 3145 } 3146 3147 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3148 hci_stack->link_supervision_timeout = link_supervision_timeout; 3149 } 3150 3151 void hci_disable_l2cap_timeout_check(void){ 3152 disable_l2cap_timeouts = 1; 3153 } 3154 #endif 3155 3156 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3157 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3158 void hci_set_bd_addr(bd_addr_t addr){ 3159 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3160 hci_stack->custom_bd_addr_set = 1; 3161 } 3162 #endif 3163 3164 // State-Module-Driver overview 3165 // state module low-level 3166 // HCI_STATE_OFF off close 3167 // HCI_STATE_INITIALIZING, on open 3168 // HCI_STATE_WORKING, on open 3169 // HCI_STATE_HALTING, on open 3170 // HCI_STATE_SLEEPING, off/sleep close 3171 // HCI_STATE_FALLING_ASLEEP on open 3172 3173 static int hci_power_control_on(void){ 3174 3175 // power on 3176 int err = 0; 3177 if (hci_stack->control && hci_stack->control->on){ 3178 err = (*hci_stack->control->on)(); 3179 } 3180 if (err){ 3181 log_error( "POWER_ON failed"); 3182 hci_emit_hci_open_failed(); 3183 return err; 3184 } 3185 3186 // int chipset driver 3187 if (hci_stack->chipset && hci_stack->chipset->init){ 3188 hci_stack->chipset->init(hci_stack->config); 3189 } 3190 3191 // init transport 3192 if (hci_stack->hci_transport->init){ 3193 hci_stack->hci_transport->init(hci_stack->config); 3194 } 3195 3196 // open transport 3197 err = hci_stack->hci_transport->open(); 3198 if (err){ 3199 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3200 if (hci_stack->control && hci_stack->control->off){ 3201 (*hci_stack->control->off)(); 3202 } 3203 hci_emit_hci_open_failed(); 3204 return err; 3205 } 3206 return 0; 3207 } 3208 3209 static void hci_power_control_off(void){ 3210 3211 log_info("hci_power_control_off"); 3212 3213 // close low-level device 3214 hci_stack->hci_transport->close(); 3215 3216 log_info("hci_power_control_off - hci_transport closed"); 3217 3218 // power off 3219 if (hci_stack->control && hci_stack->control->off){ 3220 (*hci_stack->control->off)(); 3221 } 3222 3223 log_info("hci_power_control_off - control closed"); 3224 3225 hci_stack->state = HCI_STATE_OFF; 3226 } 3227 3228 static void hci_power_control_sleep(void){ 3229 3230 log_info("hci_power_control_sleep"); 3231 3232 #if 0 3233 // don't close serial port during sleep 3234 3235 // close low-level device 3236 hci_stack->hci_transport->close(hci_stack->config); 3237 #endif 3238 3239 // sleep mode 3240 if (hci_stack->control && hci_stack->control->sleep){ 3241 (*hci_stack->control->sleep)(); 3242 } 3243 3244 hci_stack->state = HCI_STATE_SLEEPING; 3245 } 3246 3247 static int hci_power_control_wake(void){ 3248 3249 log_info("hci_power_control_wake"); 3250 3251 // wake on 3252 if (hci_stack->control && hci_stack->control->wake){ 3253 (*hci_stack->control->wake)(); 3254 } 3255 3256 #if 0 3257 // open low-level device 3258 int err = hci_stack->hci_transport->open(hci_stack->config); 3259 if (err){ 3260 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3261 if (hci_stack->control && hci_stack->control->off){ 3262 (*hci_stack->control->off)(); 3263 } 3264 hci_emit_hci_open_failed(); 3265 return err; 3266 } 3267 #endif 3268 3269 return 0; 3270 } 3271 3272 static void hci_power_transition_to_initializing(void){ 3273 // set up state machine 3274 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3275 hci_stack->hci_packet_buffer_reserved = 0; 3276 hci_stack->state = HCI_STATE_INITIALIZING; 3277 hci_stack->substate = HCI_INIT_SEND_RESET; 3278 } 3279 3280 int hci_power_control(HCI_POWER_MODE power_mode){ 3281 3282 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3283 3284 int err = 0; 3285 switch (hci_stack->state){ 3286 3287 case HCI_STATE_OFF: 3288 switch (power_mode){ 3289 case HCI_POWER_ON: 3290 err = hci_power_control_on(); 3291 if (err) { 3292 log_error("hci_power_control_on() error %d", err); 3293 return err; 3294 } 3295 hci_power_transition_to_initializing(); 3296 break; 3297 case HCI_POWER_OFF: 3298 // do nothing 3299 break; 3300 case HCI_POWER_SLEEP: 3301 // do nothing (with SLEEP == OFF) 3302 break; 3303 } 3304 break; 3305 3306 case HCI_STATE_INITIALIZING: 3307 switch (power_mode){ 3308 case HCI_POWER_ON: 3309 // do nothing 3310 break; 3311 case HCI_POWER_OFF: 3312 // no connections yet, just turn it off 3313 hci_power_control_off(); 3314 break; 3315 case HCI_POWER_SLEEP: 3316 // no connections yet, just turn it off 3317 hci_power_control_sleep(); 3318 break; 3319 } 3320 break; 3321 3322 case HCI_STATE_WORKING: 3323 switch (power_mode){ 3324 case HCI_POWER_ON: 3325 // do nothing 3326 break; 3327 case HCI_POWER_OFF: 3328 // see hci_run 3329 hci_stack->state = HCI_STATE_HALTING; 3330 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3331 break; 3332 case HCI_POWER_SLEEP: 3333 // see hci_run 3334 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3335 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3336 break; 3337 } 3338 break; 3339 3340 case HCI_STATE_HALTING: 3341 switch (power_mode){ 3342 case HCI_POWER_ON: 3343 hci_power_transition_to_initializing(); 3344 break; 3345 case HCI_POWER_OFF: 3346 // do nothing 3347 break; 3348 case HCI_POWER_SLEEP: 3349 // see hci_run 3350 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3351 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3352 break; 3353 } 3354 break; 3355 3356 case HCI_STATE_FALLING_ASLEEP: 3357 switch (power_mode){ 3358 case HCI_POWER_ON: 3359 3360 #ifdef HAVE_PLATFORM_IPHONE_OS 3361 // nothing to do, if H4 supports power management 3362 if (btstack_control_iphone_power_management_enabled()){ 3363 hci_stack->state = HCI_STATE_INITIALIZING; 3364 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3365 break; 3366 } 3367 #endif 3368 hci_power_transition_to_initializing(); 3369 break; 3370 case HCI_POWER_OFF: 3371 // see hci_run 3372 hci_stack->state = HCI_STATE_HALTING; 3373 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3374 break; 3375 case HCI_POWER_SLEEP: 3376 // do nothing 3377 break; 3378 } 3379 break; 3380 3381 case HCI_STATE_SLEEPING: 3382 switch (power_mode){ 3383 case HCI_POWER_ON: 3384 3385 #ifdef HAVE_PLATFORM_IPHONE_OS 3386 // nothing to do, if H4 supports power management 3387 if (btstack_control_iphone_power_management_enabled()){ 3388 hci_stack->state = HCI_STATE_INITIALIZING; 3389 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3390 hci_update_scan_enable(); 3391 break; 3392 } 3393 #endif 3394 err = hci_power_control_wake(); 3395 if (err) return err; 3396 hci_power_transition_to_initializing(); 3397 break; 3398 case HCI_POWER_OFF: 3399 hci_stack->state = HCI_STATE_HALTING; 3400 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3401 break; 3402 case HCI_POWER_SLEEP: 3403 // do nothing 3404 break; 3405 } 3406 break; 3407 } 3408 3409 // create internal event 3410 hci_emit_state(); 3411 3412 // trigger next/first action 3413 hci_run(); 3414 3415 return 0; 3416 } 3417 3418 3419 #ifdef ENABLE_CLASSIC 3420 3421 static void hci_update_scan_enable(void){ 3422 // 2 = page scan, 1 = inq scan 3423 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3424 hci_run(); 3425 } 3426 3427 void gap_discoverable_control(uint8_t enable){ 3428 if (enable) enable = 1; // normalize argument 3429 3430 if (hci_stack->discoverable == enable){ 3431 hci_emit_discoverable_enabled(hci_stack->discoverable); 3432 return; 3433 } 3434 3435 hci_stack->discoverable = enable; 3436 hci_update_scan_enable(); 3437 } 3438 3439 void gap_connectable_control(uint8_t enable){ 3440 if (enable) enable = 1; // normalize argument 3441 3442 // don't emit event 3443 if (hci_stack->connectable == enable) return; 3444 3445 hci_stack->connectable = enable; 3446 hci_update_scan_enable(); 3447 } 3448 #endif 3449 3450 void gap_local_bd_addr(bd_addr_t address_buffer){ 3451 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3452 } 3453 3454 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3455 static void hci_host_num_completed_packets(void){ 3456 3457 // create packet manually as arrays are not supported and num_commands should not get reduced 3458 hci_reserve_packet_buffer(); 3459 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3460 3461 uint16_t size = 0; 3462 uint16_t num_handles = 0; 3463 packet[size++] = 0x35; 3464 packet[size++] = 0x0c; 3465 size++; // skip param len 3466 size++; // skip num handles 3467 3468 // add { handle, packets } entries 3469 btstack_linked_item_t * it; 3470 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3471 hci_connection_t * connection = (hci_connection_t *) it; 3472 if (connection->num_packets_completed){ 3473 little_endian_store_16(packet, size, connection->con_handle); 3474 size += 2; 3475 little_endian_store_16(packet, size, connection->num_packets_completed); 3476 size += 2; 3477 // 3478 num_handles++; 3479 connection->num_packets_completed = 0; 3480 } 3481 } 3482 3483 packet[2] = size - 3; 3484 packet[3] = num_handles; 3485 3486 hci_stack->host_completed_packets = 0; 3487 3488 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3489 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3490 3491 // release packet buffer for synchronous transport implementations 3492 if (hci_transport_synchronous()){ 3493 hci_release_packet_buffer(); 3494 hci_emit_transport_packet_sent(); 3495 } 3496 } 3497 #endif 3498 3499 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3500 UNUSED(ds); 3501 hci_stack->substate = HCI_HALTING_CLOSE; 3502 // allow packet handlers to defer final shutdown 3503 hci_emit_state(); 3504 hci_run(); 3505 } 3506 3507 static bool hci_run_acl_fragments(void){ 3508 if (hci_stack->acl_fragmentation_total_size > 0) { 3509 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3510 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3511 if (connection) { 3512 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3513 hci_send_acl_packet_fragments(connection); 3514 return true; 3515 } 3516 } else { 3517 // connection gone -> discard further fragments 3518 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3519 hci_stack->acl_fragmentation_total_size = 0; 3520 hci_stack->acl_fragmentation_pos = 0; 3521 } 3522 } 3523 return false; 3524 } 3525 3526 #ifdef ENABLE_CLASSIC 3527 static bool hci_run_general_gap_classic(void){ 3528 3529 // decline incoming connections 3530 if (hci_stack->decline_reason){ 3531 uint8_t reason = hci_stack->decline_reason; 3532 hci_stack->decline_reason = 0; 3533 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3534 return true; 3535 } 3536 // send scan enable 3537 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3538 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3539 hci_stack->new_scan_enable_value = 0xff; 3540 return true; 3541 } 3542 // start/stop inquiry 3543 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3544 uint8_t duration = hci_stack->inquiry_state; 3545 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3546 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3547 return true; 3548 } 3549 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3550 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3551 hci_send_cmd(&hci_inquiry_cancel); 3552 return true; 3553 } 3554 // remote name request 3555 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3556 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3557 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3558 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3559 return true; 3560 } 3561 // pairing 3562 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3563 uint8_t state = hci_stack->gap_pairing_state; 3564 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3565 switch (state){ 3566 case GAP_PAIRING_STATE_SEND_PIN: 3567 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); 3568 break; 3569 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3570 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3571 break; 3572 case GAP_PAIRING_STATE_SEND_PASSKEY: 3573 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3574 break; 3575 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3576 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3577 break; 3578 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3579 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3580 break; 3581 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3582 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3583 break; 3584 default: 3585 break; 3586 } 3587 return true; 3588 } 3589 return false; 3590 } 3591 #endif 3592 3593 #ifdef ENABLE_BLE 3594 static bool hci_run_general_gap_le(void){ 3595 3596 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3597 3598 if (hci_stack->state != HCI_STATE_WORKING) return false; 3599 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0) ) return false; 3600 3601 #ifdef ENABLE_LE_CENTRAL 3602 // parameter change requires scanning to be stopped first 3603 if (hci_stack->le_scan_type != 0xff) { 3604 if (hci_stack->le_scanning_active){ 3605 hci_stack->le_scanning_active = 0; 3606 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3607 } else { 3608 int scan_type = (int) hci_stack->le_scan_type; 3609 hci_stack->le_scan_type = 0xff; 3610 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); 3611 } 3612 return true; 3613 } 3614 // finally, we can enable/disable le scan 3615 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3616 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3617 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3618 return true; 3619 } 3620 #endif 3621 #ifdef ENABLE_LE_PERIPHERAL 3622 // le advertisement control 3623 if (hci_stack->le_advertisements_todo){ 3624 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3625 } 3626 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3627 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3628 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3629 return true; 3630 } 3631 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3632 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3633 hci_send_cmd(&hci_le_set_advertising_parameters, 3634 hci_stack->le_advertisements_interval_min, 3635 hci_stack->le_advertisements_interval_max, 3636 hci_stack->le_advertisements_type, 3637 hci_stack->le_own_addr_type, 3638 hci_stack->le_advertisements_direct_address_type, 3639 hci_stack->le_advertisements_direct_address, 3640 hci_stack->le_advertisements_channel_map, 3641 hci_stack->le_advertisements_filter_policy); 3642 return true; 3643 } 3644 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3645 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3646 uint8_t adv_data_clean[31]; 3647 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3648 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3649 hci_stack->le_advertisements_data_len); 3650 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3651 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3652 return true; 3653 } 3654 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3655 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3656 uint8_t scan_data_clean[31]; 3657 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3658 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3659 hci_stack->le_scan_response_data_len); 3660 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3661 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3662 return true; 3663 } 3664 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3665 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3666 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3667 return true; 3668 } 3669 #endif 3670 3671 #ifdef ENABLE_LE_CENTRAL 3672 // 3673 // LE Whitelist Management 3674 // 3675 3676 // check if whitelist needs modification 3677 btstack_linked_list_iterator_t lit; 3678 int modification_pending = 0; 3679 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3680 while (btstack_linked_list_iterator_has_next(&lit)){ 3681 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3682 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3683 modification_pending = 1; 3684 break; 3685 } 3686 } 3687 3688 if (modification_pending){ 3689 // stop connnecting if modification pending 3690 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3691 hci_send_cmd(&hci_le_create_connection_cancel); 3692 return true; 3693 } 3694 3695 // add/remove entries 3696 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3697 while (btstack_linked_list_iterator_has_next(&lit)){ 3698 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3699 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3700 entry->state = LE_WHITELIST_ON_CONTROLLER; 3701 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3702 return true; 3703 } 3704 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3705 bd_addr_t address; 3706 bd_addr_type_t address_type = entry->address_type; 3707 (void)memcpy(address, entry->address, 6); 3708 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3709 btstack_memory_whitelist_entry_free(entry); 3710 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3711 return true; 3712 } 3713 } 3714 } 3715 3716 // start connecting 3717 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && 3718 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3719 bd_addr_t null_addr; 3720 memset(null_addr, 0, 6); 3721 hci_send_cmd(&hci_le_create_connection, 3722 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3723 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3724 1, // use whitelist 3725 0, // peer address type 3726 null_addr, // peer bd addr 3727 hci_stack->le_own_addr_type, // our addr type: 3728 hci_stack->le_connection_interval_min, // conn interval min 3729 hci_stack->le_connection_interval_max, // conn interval max 3730 hci_stack->le_connection_latency, // conn latency 3731 hci_stack->le_supervision_timeout, // conn latency 3732 hci_stack->le_minimum_ce_length, // min ce length 3733 hci_stack->le_maximum_ce_length // max ce length 3734 ); 3735 return true; 3736 } 3737 #endif 3738 return false; 3739 } 3740 #endif 3741 3742 static bool hci_run_general_pending_commmands(void){ 3743 btstack_linked_item_t * it; 3744 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3745 hci_connection_t * connection = (hci_connection_t *) it; 3746 3747 switch(connection->state){ 3748 case SEND_CREATE_CONNECTION: 3749 switch(connection->address_type){ 3750 #ifdef ENABLE_CLASSIC 3751 case BD_ADDR_TYPE_ACL: 3752 log_info("sending hci_create_connection"); 3753 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3754 break; 3755 #endif 3756 default: 3757 #ifdef ENABLE_BLE 3758 #ifdef ENABLE_LE_CENTRAL 3759 // track outgoing connection 3760 hci_stack->outgoing_addr_type = connection->address_type; 3761 (void)memcpy(hci_stack->outgoing_addr, 3762 connection->address, 6); 3763 log_info("sending hci_le_create_connection"); 3764 hci_send_cmd(&hci_le_create_connection, 3765 hci_stack->le_connection_scan_interval, // conn scan interval 3766 hci_stack->le_connection_scan_window, // conn scan windows 3767 0, // don't use whitelist 3768 connection->address_type, // peer address type 3769 connection->address, // peer bd addr 3770 hci_stack->le_own_addr_type, // our addr type: 3771 hci_stack->le_connection_interval_min, // conn interval min 3772 hci_stack->le_connection_interval_max, // conn interval max 3773 hci_stack->le_connection_latency, // conn latency 3774 hci_stack->le_supervision_timeout, // conn latency 3775 hci_stack->le_minimum_ce_length, // min ce length 3776 hci_stack->le_maximum_ce_length // max ce length 3777 ); 3778 connection->state = SENT_CREATE_CONNECTION; 3779 #endif 3780 #endif 3781 break; 3782 } 3783 return true; 3784 3785 #ifdef ENABLE_CLASSIC 3786 case RECEIVED_CONNECTION_REQUEST: 3787 connection->role = HCI_ROLE_SLAVE; 3788 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3789 log_info("sending hci_accept_connection_request"); 3790 connection->state = ACCEPTED_CONNECTION_REQUEST; 3791 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3792 } 3793 return true; 3794 #endif 3795 3796 #ifdef ENABLE_BLE 3797 #ifdef ENABLE_LE_CENTRAL 3798 case SEND_CANCEL_CONNECTION: 3799 connection->state = SENT_CANCEL_CONNECTION; 3800 hci_send_cmd(&hci_le_create_connection_cancel); 3801 return true; 3802 #endif 3803 #endif 3804 case SEND_DISCONNECT: 3805 connection->state = SENT_DISCONNECT; 3806 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3807 return true; 3808 3809 default: 3810 break; 3811 } 3812 3813 // no further commands if connection is about to get shut down 3814 if (connection->state == SENT_DISCONNECT) continue; 3815 3816 if (connection->authentication_flags & READ_RSSI){ 3817 connectionClearAuthenticationFlags(connection, READ_RSSI); 3818 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3819 return true; 3820 } 3821 3822 #ifdef ENABLE_CLASSIC 3823 3824 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 3825 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 3826 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 3827 return true; 3828 } 3829 3830 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3831 log_info("responding to link key request"); 3832 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3833 3834 link_key_t link_key; 3835 link_key_type_t link_key_type; 3836 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 3837 3838 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3839 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 3840 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 3841 if (sc_downgrade){ 3842 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 3843 connection->state = SENT_DISCONNECT; 3844 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 3845 return true; 3846 } 3847 3848 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 3849 if (have_link_key && security_level_sufficient){ 3850 connection->link_key_type = link_key_type; 3851 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3852 } else { 3853 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3854 } 3855 return true; 3856 } 3857 3858 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3859 log_info("denying to pin request"); 3860 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3861 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3862 return true; 3863 } 3864 3865 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3866 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3867 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3868 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3869 // tweak authentication requirements 3870 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3871 if (connection->bonding_flags & BONDING_DEDICATED){ 3872 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3873 } 3874 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3875 authreq |= 1; 3876 } 3877 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3878 } else { 3879 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3880 } 3881 return true; 3882 } 3883 3884 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3885 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3886 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3887 return true; 3888 } 3889 3890 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3891 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3892 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3893 return true; 3894 } 3895 3896 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 3897 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 3898 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3899 return true; 3900 } 3901 3902 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 3903 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3904 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 3905 return true; 3906 } 3907 3908 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 3909 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3910 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 3911 return true; 3912 } 3913 3914 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3915 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3916 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3917 connection->state = SENT_DISCONNECT; 3918 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3919 return true; 3920 } 3921 3922 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3923 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3924 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 3925 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3926 return true; 3927 } 3928 3929 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3930 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3931 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3932 return true; 3933 } 3934 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3935 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3936 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3937 return true; 3938 } 3939 #endif 3940 3941 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3942 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3943 if (connection->state != SENT_DISCONNECT){ 3944 connection->state = SENT_DISCONNECT; 3945 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 3946 return true; 3947 } 3948 } 3949 3950 #ifdef ENABLE_CLASSIC 3951 uint16_t sniff_min_interval; 3952 switch (connection->sniff_min_interval){ 3953 case 0: 3954 break; 3955 case 0xffff: 3956 connection->sniff_min_interval = 0; 3957 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3958 return true; 3959 default: 3960 sniff_min_interval = connection->sniff_min_interval; 3961 connection->sniff_min_interval = 0; 3962 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3963 return true; 3964 } 3965 #endif 3966 3967 #ifdef ENABLE_BLE 3968 switch (connection->le_con_parameter_update_state){ 3969 // response to L2CAP CON PARAMETER UPDATE REQUEST 3970 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3971 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3972 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3973 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3974 0x0000, 0xffff); 3975 return true; 3976 case CON_PARAMETER_UPDATE_REPLY: 3977 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3978 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3979 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3980 0x0000, 0xffff); 3981 return true; 3982 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3983 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3984 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3985 return true; 3986 default: 3987 break; 3988 } 3989 if (connection->le_phy_update_all_phys != 0xff){ 3990 uint8_t all_phys = connection->le_phy_update_all_phys; 3991 connection->le_phy_update_all_phys = 0xff; 3992 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); 3993 return true; 3994 } 3995 #endif 3996 } 3997 return false; 3998 } 3999 4000 static void hci_run(void){ 4001 4002 bool done; 4003 4004 // send continuation fragments first, as they block the prepared packet buffer 4005 done = hci_run_acl_fragments(); 4006 if (done) return; 4007 4008 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4009 // send host num completed packets next as they don't require num_cmd_packets > 0 4010 if (!hci_can_send_comand_packet_transport()) return; 4011 if (hci_stack->host_completed_packets){ 4012 hci_host_num_completed_packets(); 4013 return; 4014 } 4015 #endif 4016 4017 if (!hci_can_send_command_packet_now()) return; 4018 4019 // global/non-connection oriented commands 4020 4021 4022 #ifdef ENABLE_CLASSIC 4023 // general gap classic 4024 done = hci_run_general_gap_classic(); 4025 if (done) return; 4026 #endif 4027 4028 #ifdef ENABLE_BLE 4029 // general gap le 4030 done = hci_run_general_gap_le(); 4031 if (done) return; 4032 #endif 4033 4034 // send pending HCI commands 4035 done = hci_run_general_pending_commmands(); 4036 if (done) return; 4037 4038 // stack state sub statemachines 4039 hci_connection_t * connection; 4040 switch (hci_stack->state){ 4041 case HCI_STATE_INITIALIZING: 4042 hci_initializing_run(); 4043 break; 4044 4045 case HCI_STATE_HALTING: 4046 4047 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4048 switch (hci_stack->substate){ 4049 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4050 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4051 4052 #ifdef ENABLE_BLE 4053 #ifdef ENABLE_LE_CENTRAL 4054 // free whitelist entries 4055 { 4056 btstack_linked_list_iterator_t lit; 4057 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4058 while (btstack_linked_list_iterator_has_next(&lit)){ 4059 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4060 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4061 btstack_memory_whitelist_entry_free(entry); 4062 } 4063 } 4064 #endif 4065 #endif 4066 // close all open connections 4067 connection = (hci_connection_t *) hci_stack->connections; 4068 if (connection){ 4069 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4070 if (!hci_can_send_command_packet_now()) return; 4071 4072 // check state 4073 if (connection->state == SENT_DISCONNECT) return; 4074 connection->state = SENT_DISCONNECT; 4075 4076 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4077 4078 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4079 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4080 4081 // ... which would be ignored anyway as we shutdown (free) the connection now 4082 hci_shutdown_connection(connection); 4083 4084 // finally, send the disconnect command 4085 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4086 return; 4087 } 4088 4089 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4090 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4091 log_info("HCI_STATE_HALTING: wait 50 ms"); 4092 hci_stack->substate = HCI_HALTING_W4_TIMER; 4093 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4094 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4095 btstack_run_loop_add_timer(&hci_stack->timeout); 4096 break; 4097 } 4098 4099 /* fall through */ 4100 4101 case HCI_HALTING_CLOSE: 4102 log_info("HCI_STATE_HALTING, calling off"); 4103 4104 // switch mode 4105 hci_power_control_off(); 4106 4107 log_info("HCI_STATE_HALTING, emitting state"); 4108 hci_emit_state(); 4109 log_info("HCI_STATE_HALTING, done"); 4110 break; 4111 4112 case HCI_HALTING_W4_TIMER: 4113 // keep waiting 4114 4115 break; 4116 default: 4117 break; 4118 } 4119 4120 break; 4121 4122 case HCI_STATE_FALLING_ASLEEP: 4123 switch(hci_stack->substate) { 4124 case HCI_FALLING_ASLEEP_DISCONNECT: 4125 log_info("HCI_STATE_FALLING_ASLEEP"); 4126 // close all open connections 4127 connection = (hci_connection_t *) hci_stack->connections; 4128 4129 #ifdef HAVE_PLATFORM_IPHONE_OS 4130 // don't close connections, if H4 supports power management 4131 if (btstack_control_iphone_power_management_enabled()){ 4132 connection = NULL; 4133 } 4134 #endif 4135 if (connection){ 4136 4137 // send disconnect 4138 if (!hci_can_send_command_packet_now()) return; 4139 4140 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4141 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4142 4143 // send disconnected event right away - causes higher layer connections to get closed, too. 4144 hci_shutdown_connection(connection); 4145 return; 4146 } 4147 4148 if (hci_classic_supported()){ 4149 // disable page and inquiry scan 4150 if (!hci_can_send_command_packet_now()) return; 4151 4152 log_info("HCI_STATE_HALTING, disabling inq scans"); 4153 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4154 4155 // continue in next sub state 4156 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4157 break; 4158 } 4159 4160 /* fall through */ 4161 4162 case HCI_FALLING_ASLEEP_COMPLETE: 4163 log_info("HCI_STATE_HALTING, calling sleep"); 4164 #ifdef HAVE_PLATFORM_IPHONE_OS 4165 // don't actually go to sleep, if H4 supports power management 4166 if (btstack_control_iphone_power_management_enabled()){ 4167 // SLEEP MODE reached 4168 hci_stack->state = HCI_STATE_SLEEPING; 4169 hci_emit_state(); 4170 break; 4171 } 4172 #endif 4173 // switch mode 4174 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4175 hci_emit_state(); 4176 break; 4177 4178 default: 4179 break; 4180 } 4181 break; 4182 4183 default: 4184 break; 4185 } 4186 } 4187 4188 int hci_send_cmd_packet(uint8_t *packet, int size){ 4189 // house-keeping 4190 4191 #ifdef ENABLE_CLASSIC 4192 bd_addr_t addr; 4193 hci_connection_t * conn; 4194 #endif 4195 #ifdef ENABLE_LE_CENTRAL 4196 uint8_t initiator_filter_policy; 4197 #endif 4198 4199 uint16_t opcode = little_endian_read_16(packet, 0); 4200 switch (opcode) { 4201 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4202 hci_stack->loopback_mode = packet[3]; 4203 break; 4204 4205 #ifdef ENABLE_CLASSIC 4206 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4207 reverse_bd_addr(&packet[3], addr); 4208 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4209 4210 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4211 if (!conn) { 4212 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4213 if (!conn) { 4214 // notify client that alloc failed 4215 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4216 return -1; // packet not sent to controller 4217 } 4218 conn->state = SEND_CREATE_CONNECTION; 4219 } 4220 log_info("conn state %u", conn->state); 4221 switch (conn->state) { 4222 // if connection active exists 4223 case OPEN: 4224 // and OPEN, emit connection complete command 4225 hci_emit_connection_complete(addr, conn->con_handle, 0); 4226 return -1; // packet not sent to controller 4227 case RECEIVED_DISCONNECTION_COMPLETE: 4228 // create connection triggered in disconnect complete event, let's do it now 4229 break; 4230 case SEND_CREATE_CONNECTION: 4231 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4232 break; 4233 default: 4234 // otherwise, just ignore as it is already in the open process 4235 return -1; // packet not sent to controller 4236 } 4237 conn->state = SENT_CREATE_CONNECTION; 4238 4239 // track outgoing connection 4240 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4241 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4242 break; 4243 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4244 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4245 break; 4246 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4247 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4248 break; 4249 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4250 if (hci_stack->link_key_db) { 4251 reverse_bd_addr(&packet[3], addr); 4252 hci_stack->link_key_db->delete_link_key(addr); 4253 } 4254 break; 4255 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4256 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4257 reverse_bd_addr(&packet[3], addr); 4258 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4259 if (conn) { 4260 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4261 } 4262 break; 4263 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4264 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4265 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4266 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4267 reverse_bd_addr(&packet[3], addr); 4268 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4269 if (conn) { 4270 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4271 } 4272 break; 4273 4274 #ifdef ENABLE_SCO_OVER_HCI 4275 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4276 // setup_synchronous_connection? Voice setting at offset 22 4277 // TODO: compare to current setting if sco connection already active 4278 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4279 break; 4280 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4281 // accept_synchronus_connection? Voice setting at offset 18 4282 // TODO: compare to current setting if sco connection already active 4283 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4284 break; 4285 #endif 4286 #endif 4287 4288 #ifdef ENABLE_BLE 4289 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4290 hci_stack->le_random_address_set = 1; 4291 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4292 break; 4293 #ifdef ENABLE_LE_PERIPHERAL 4294 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4295 hci_stack->le_advertisements_active = packet[3]; 4296 break; 4297 #endif 4298 #ifdef ENABLE_LE_CENTRAL 4299 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4300 // white list used? 4301 initiator_filter_policy = packet[7]; 4302 switch (initiator_filter_policy) { 4303 case 0: 4304 // whitelist not used 4305 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4306 break; 4307 case 1: 4308 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4309 break; 4310 default: 4311 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4312 break; 4313 } 4314 break; 4315 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4316 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4317 break; 4318 #endif 4319 #endif 4320 default: 4321 break; 4322 } 4323 4324 hci_stack->num_cmd_packets--; 4325 4326 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4327 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4328 } 4329 4330 // disconnect because of security block 4331 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4332 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4333 if (!connection) return; 4334 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4335 } 4336 4337 4338 // Configure Secure Simple Pairing 4339 4340 #ifdef ENABLE_CLASSIC 4341 4342 // enable will enable SSP during init 4343 void gap_ssp_set_enable(int enable){ 4344 hci_stack->ssp_enable = enable; 4345 } 4346 4347 static int hci_local_ssp_activated(void){ 4348 return gap_ssp_supported() && hci_stack->ssp_enable; 4349 } 4350 4351 // if set, BTstack will respond to io capability request using authentication requirement 4352 void gap_ssp_set_io_capability(int io_capability){ 4353 hci_stack->ssp_io_capability = io_capability; 4354 } 4355 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4356 hci_stack->ssp_authentication_requirement = authentication_requirement; 4357 } 4358 4359 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4360 void gap_ssp_set_auto_accept(int auto_accept){ 4361 hci_stack->ssp_auto_accept = auto_accept; 4362 } 4363 4364 void gap_secure_connections_enable(bool enable){ 4365 hci_stack->secure_connections_enable = enable; 4366 } 4367 4368 #endif 4369 4370 // va_list part of hci_send_cmd 4371 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4372 if (!hci_can_send_command_packet_now()){ 4373 log_error("hci_send_cmd called but cannot send packet now"); 4374 return 0; 4375 } 4376 4377 // for HCI INITIALIZATION 4378 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4379 hci_stack->last_cmd_opcode = cmd->opcode; 4380 4381 hci_reserve_packet_buffer(); 4382 uint8_t * packet = hci_stack->hci_packet_buffer; 4383 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4384 int err = hci_send_cmd_packet(packet, size); 4385 4386 // release packet buffer on error or for synchronous transport implementations 4387 if ((err < 0) || hci_transport_synchronous()){ 4388 hci_release_packet_buffer(); 4389 hci_emit_transport_packet_sent(); 4390 } 4391 4392 return err; 4393 } 4394 4395 /** 4396 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4397 */ 4398 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4399 va_list argptr; 4400 va_start(argptr, cmd); 4401 int res = hci_send_cmd_va_arg(cmd, argptr); 4402 va_end(argptr); 4403 return res; 4404 } 4405 4406 // Create various non-HCI events. 4407 // TODO: generalize, use table similar to hci_create_command 4408 4409 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4410 // dump packet 4411 if (dump) { 4412 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4413 } 4414 4415 // dispatch to all event handlers 4416 btstack_linked_list_iterator_t it; 4417 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4418 while (btstack_linked_list_iterator_has_next(&it)){ 4419 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4420 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4421 } 4422 } 4423 4424 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4425 if (!hci_stack->acl_packet_handler) return; 4426 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4427 } 4428 4429 #ifdef ENABLE_CLASSIC 4430 static void hci_notify_if_sco_can_send_now(void){ 4431 // notify SCO sender if waiting 4432 if (!hci_stack->sco_waiting_for_can_send_now) return; 4433 if (hci_can_send_sco_packet_now()){ 4434 hci_stack->sco_waiting_for_can_send_now = 0; 4435 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4436 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4437 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4438 } 4439 } 4440 4441 // parsing end emitting has been merged to reduce code size 4442 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4443 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4444 4445 uint8_t * eir_data; 4446 ad_context_t context; 4447 const uint8_t * name; 4448 uint8_t name_len; 4449 4450 if (size < 3) return; 4451 4452 int event_type = hci_event_packet_get_type(packet); 4453 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4454 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4455 4456 switch (event_type){ 4457 case HCI_EVENT_INQUIRY_RESULT: 4458 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4459 if (size != (3 + (num_responses * 14))) return; 4460 break; 4461 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4462 if (size != 257) return; 4463 if (num_responses != 1) return; 4464 break; 4465 default: 4466 return; 4467 } 4468 4469 // event[1] is set at the end 4470 int i; 4471 for (i=0; i<num_responses;i++){ 4472 memset(event, 0, sizeof(event)); 4473 event[0] = GAP_EVENT_INQUIRY_RESULT; 4474 uint8_t event_size = 18; // if name is not set by EIR 4475 4476 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4477 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4478 (void)memcpy(&event[9], 4479 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4480 3); // class of device 4481 (void)memcpy(&event[12], 4482 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4483 2); // clock offset 4484 4485 switch (event_type){ 4486 case HCI_EVENT_INQUIRY_RESULT: 4487 // 14,15,16,17 = 0, size 18 4488 break; 4489 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4490 event[14] = 1; 4491 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4492 // 16,17 = 0, size 18 4493 break; 4494 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4495 event[14] = 1; 4496 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4497 // EIR packets only contain a single inquiry response 4498 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4499 name = NULL; 4500 // Iterate over EIR data 4501 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4502 uint8_t data_type = ad_iterator_get_data_type(&context); 4503 uint8_t data_size = ad_iterator_get_data_len(&context); 4504 const uint8_t * data = ad_iterator_get_data(&context); 4505 // Prefer Complete Local Name over Shortend Local Name 4506 switch (data_type){ 4507 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4508 if (name) continue; 4509 /* fall through */ 4510 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4511 name = data; 4512 name_len = data_size; 4513 break; 4514 default: 4515 break; 4516 } 4517 } 4518 if (name){ 4519 event[16] = 1; 4520 // truncate name if needed 4521 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4522 event[17] = len; 4523 (void)memcpy(&event[18], name, len); 4524 event_size += len; 4525 } 4526 break; 4527 } 4528 event[1] = event_size - 2; 4529 hci_emit_event(event, event_size, 1); 4530 } 4531 } 4532 #endif 4533 4534 void hci_emit_state(void){ 4535 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4536 uint8_t event[3]; 4537 event[0] = BTSTACK_EVENT_STATE; 4538 event[1] = sizeof(event) - 2; 4539 event[2] = hci_stack->state; 4540 hci_emit_event(event, sizeof(event), 1); 4541 } 4542 4543 #ifdef ENABLE_CLASSIC 4544 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4545 uint8_t event[13]; 4546 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4547 event[1] = sizeof(event) - 2; 4548 event[2] = status; 4549 little_endian_store_16(event, 3, con_handle); 4550 reverse_bd_addr(address, &event[5]); 4551 event[11] = 1; // ACL connection 4552 event[12] = 0; // encryption disabled 4553 hci_emit_event(event, sizeof(event), 1); 4554 } 4555 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4556 if (disable_l2cap_timeouts) return; 4557 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4558 uint8_t event[4]; 4559 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4560 event[1] = sizeof(event) - 2; 4561 little_endian_store_16(event, 2, conn->con_handle); 4562 hci_emit_event(event, sizeof(event), 1); 4563 } 4564 #endif 4565 4566 #ifdef ENABLE_BLE 4567 #ifdef ENABLE_LE_CENTRAL 4568 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4569 uint8_t event[21]; 4570 event[0] = HCI_EVENT_LE_META; 4571 event[1] = sizeof(event) - 2; 4572 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4573 event[3] = status; 4574 little_endian_store_16(event, 4, con_handle); 4575 event[6] = 0; // TODO: role 4576 event[7] = address_type; 4577 reverse_bd_addr(address, &event[8]); 4578 little_endian_store_16(event, 14, 0); // interval 4579 little_endian_store_16(event, 16, 0); // latency 4580 little_endian_store_16(event, 18, 0); // supervision timeout 4581 event[20] = 0; // master clock accuracy 4582 hci_emit_event(event, sizeof(event), 1); 4583 } 4584 #endif 4585 #endif 4586 4587 static void hci_emit_transport_packet_sent(void){ 4588 // notify upper stack that it might be possible to send again 4589 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4590 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4591 } 4592 4593 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4594 uint8_t event[6]; 4595 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4596 event[1] = sizeof(event) - 2; 4597 event[2] = 0; // status = OK 4598 little_endian_store_16(event, 3, con_handle); 4599 event[5] = reason; 4600 hci_emit_event(event, sizeof(event), 1); 4601 } 4602 4603 static void hci_emit_nr_connections_changed(void){ 4604 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4605 uint8_t event[3]; 4606 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4607 event[1] = sizeof(event) - 2; 4608 event[2] = nr_hci_connections(); 4609 hci_emit_event(event, sizeof(event), 1); 4610 } 4611 4612 static void hci_emit_hci_open_failed(void){ 4613 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4614 uint8_t event[2]; 4615 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4616 event[1] = sizeof(event) - 2; 4617 hci_emit_event(event, sizeof(event), 1); 4618 } 4619 4620 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4621 log_info("hci_emit_dedicated_bonding_result %u ", status); 4622 uint8_t event[9]; 4623 int pos = 0; 4624 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4625 event[pos++] = sizeof(event) - 2; 4626 event[pos++] = status; 4627 reverse_bd_addr(address, &event[pos]); 4628 hci_emit_event(event, sizeof(event), 1); 4629 } 4630 4631 4632 #ifdef ENABLE_CLASSIC 4633 4634 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4635 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4636 uint8_t event[5]; 4637 int pos = 0; 4638 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4639 event[pos++] = sizeof(event) - 2; 4640 little_endian_store_16(event, 2, con_handle); 4641 pos += 2; 4642 event[pos++] = level; 4643 hci_emit_event(event, sizeof(event), 1); 4644 } 4645 4646 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4647 if (!connection) return LEVEL_0; 4648 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4649 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 4650 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4651 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4652 // LEVEL 4 always requires 128 bit encrytion key size 4653 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4654 security_level = LEVEL_3; 4655 } 4656 return security_level; 4657 } 4658 4659 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4660 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4661 uint8_t event[3]; 4662 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4663 event[1] = sizeof(event) - 2; 4664 event[2] = enabled; 4665 hci_emit_event(event, sizeof(event), 1); 4666 } 4667 4668 // query if remote side supports eSCO 4669 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4670 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4671 if (!connection) return 0; 4672 return (connection->remote_supported_features[0] & 1) != 0; 4673 } 4674 4675 static bool hci_ssp_supported(hci_connection_t * connection){ 4676 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 4677 return (connection->bonding_flags & mask) == mask; 4678 } 4679 4680 // query if remote side supports SSP 4681 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4682 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4683 if (!connection) return 0; 4684 return hci_ssp_supported(connection) ? 1 : 0; 4685 } 4686 4687 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4688 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4689 } 4690 4691 // GAP API 4692 /** 4693 * @bbrief enable/disable bonding. default is enabled 4694 * @praram enabled 4695 */ 4696 void gap_set_bondable_mode(int enable){ 4697 hci_stack->bondable = enable ? 1 : 0; 4698 } 4699 /** 4700 * @brief Get bondable mode. 4701 * @return 1 if bondable 4702 */ 4703 int gap_get_bondable_mode(void){ 4704 return hci_stack->bondable; 4705 } 4706 4707 /** 4708 * @brief map link keys to security levels 4709 */ 4710 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4711 switch (link_key_type){ 4712 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4713 return LEVEL_4; 4714 case COMBINATION_KEY: 4715 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4716 return LEVEL_3; 4717 default: 4718 return LEVEL_2; 4719 } 4720 } 4721 4722 /** 4723 * @brief map link keys to secure connection yes/no 4724 */ 4725 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4726 switch (link_key_type){ 4727 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4728 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4729 return 1; 4730 default: 4731 return 0; 4732 } 4733 } 4734 4735 /** 4736 * @brief map link keys to authenticated 4737 */ 4738 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4739 switch (link_key_type){ 4740 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4741 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4742 return 1; 4743 default: 4744 return 0; 4745 } 4746 } 4747 4748 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4749 log_info("gap_mitm_protection_required_for_security_level %u", level); 4750 return level > LEVEL_2; 4751 } 4752 4753 /** 4754 * @brief get current security level 4755 */ 4756 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4757 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4758 if (!connection) return LEVEL_0; 4759 return gap_security_level_for_connection(connection); 4760 } 4761 4762 /** 4763 * @brief request connection to device to 4764 * @result GAP_AUTHENTICATION_RESULT 4765 */ 4766 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4767 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4768 if (!connection){ 4769 hci_emit_security_level(con_handle, LEVEL_0); 4770 return; 4771 } 4772 gap_security_level_t current_level = gap_security_level(con_handle); 4773 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4774 requested_level, connection->requested_security_level, current_level); 4775 4776 // assumption: earlier requested security higher than current level => security request is active 4777 if (current_level < connection->requested_security_level){ 4778 if (connection->requested_security_level < requested_level){ 4779 // increase requested level as new level is higher 4780 4781 // TODO: handle re-authentication when done 4782 4783 connection->requested_security_level = requested_level; 4784 } 4785 return; 4786 } 4787 4788 // no request active, notify if security sufficient 4789 if (requested_level <= current_level){ 4790 hci_emit_security_level(con_handle, current_level); 4791 return; 4792 } 4793 4794 // start pairing to increase security level 4795 connection->requested_security_level = requested_level; 4796 4797 #if 0 4798 // sending encryption request without a link key results in an error. 4799 // TODO: figure out how to use it properly 4800 4801 // would enabling ecnryption suffice (>= LEVEL_2)? 4802 if (hci_stack->link_key_db){ 4803 link_key_type_t link_key_type; 4804 link_key_t link_key; 4805 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4806 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4807 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4808 return; 4809 } 4810 } 4811 } 4812 #endif 4813 4814 // start to authenticate connection if not already active 4815 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 4816 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4817 hci_run(); 4818 } 4819 4820 /** 4821 * @brief start dedicated bonding with device. disconnect after bonding 4822 * @param device 4823 * @param request MITM protection 4824 * @result GAP_DEDICATED_BONDING_COMPLETE 4825 */ 4826 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4827 4828 // create connection state machine 4829 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 4830 4831 if (!connection){ 4832 return BTSTACK_MEMORY_ALLOC_FAILED; 4833 } 4834 4835 // delete linkn key 4836 gap_drop_link_key_for_bd_addr(device); 4837 4838 // configure LEVEL_2/3, dedicated bonding 4839 connection->state = SEND_CREATE_CONNECTION; 4840 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4841 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4842 connection->bonding_flags = BONDING_DEDICATED; 4843 4844 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4845 4846 // handle: connnection failure (connection complete != ok) 4847 // handle: authentication failure 4848 // handle: disconnect on done 4849 4850 hci_run(); 4851 4852 return 0; 4853 } 4854 #endif 4855 4856 void gap_set_local_name(const char * local_name){ 4857 hci_stack->local_name = local_name; 4858 } 4859 4860 4861 #ifdef ENABLE_BLE 4862 4863 #ifdef ENABLE_LE_CENTRAL 4864 void gap_start_scan(void){ 4865 hci_stack->le_scanning_enabled = 1; 4866 hci_run(); 4867 } 4868 4869 void gap_stop_scan(void){ 4870 hci_stack->le_scanning_enabled = 0; 4871 hci_run(); 4872 } 4873 4874 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4875 hci_stack->le_scan_type = scan_type; 4876 hci_stack->le_scan_interval = scan_interval; 4877 hci_stack->le_scan_window = scan_window; 4878 hci_run(); 4879 } 4880 4881 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4882 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4883 if (!conn){ 4884 log_info("gap_connect: no connection exists yet, creating context"); 4885 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4886 if (!conn){ 4887 // notify client that alloc failed 4888 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4889 log_info("gap_connect: failed to alloc hci_connection_t"); 4890 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4891 } 4892 conn->state = SEND_CREATE_CONNECTION; 4893 log_info("gap_connect: send create connection next"); 4894 hci_run(); 4895 return ERROR_CODE_SUCCESS; 4896 } 4897 4898 if (!hci_is_le_connection(conn) || 4899 (conn->state == SEND_CREATE_CONNECTION) || 4900 (conn->state == SENT_CREATE_CONNECTION)) { 4901 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4902 log_error("gap_connect: classic connection or connect is already being created"); 4903 return GATT_CLIENT_IN_WRONG_STATE; 4904 } 4905 4906 // check if connection was just disconnected 4907 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4908 log_info("gap_connect: send create connection (again)"); 4909 conn->state = SEND_CREATE_CONNECTION; 4910 hci_run(); 4911 return ERROR_CODE_SUCCESS; 4912 } 4913 4914 log_info("gap_connect: context exists with state %u", conn->state); 4915 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4916 hci_run(); 4917 return ERROR_CODE_SUCCESS; 4918 } 4919 4920 // @assumption: only a single outgoing LE Connection exists 4921 static hci_connection_t * gap_get_outgoing_connection(void){ 4922 btstack_linked_item_t *it; 4923 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4924 hci_connection_t * conn = (hci_connection_t *) it; 4925 if (!hci_is_le_connection(conn)) continue; 4926 switch (conn->state){ 4927 case SEND_CREATE_CONNECTION: 4928 case SENT_CREATE_CONNECTION: 4929 case SENT_CANCEL_CONNECTION: 4930 return conn; 4931 default: 4932 break; 4933 }; 4934 } 4935 return NULL; 4936 } 4937 4938 uint8_t gap_connect_cancel(void){ 4939 hci_connection_t * conn = gap_get_outgoing_connection(); 4940 if (!conn) return 0; 4941 switch (conn->state){ 4942 case SEND_CREATE_CONNECTION: 4943 // skip sending create connection and emit event instead 4944 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4945 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4946 btstack_memory_hci_connection_free( conn ); 4947 break; 4948 case SENT_CREATE_CONNECTION: 4949 // request to send cancel connection 4950 conn->state = SEND_CANCEL_CONNECTION; 4951 hci_run(); 4952 break; 4953 default: 4954 break; 4955 } 4956 return 0; 4957 } 4958 #endif 4959 4960 #ifdef ENABLE_LE_CENTRAL 4961 /** 4962 * @brief Set connection parameters for outgoing connections 4963 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4964 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4965 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4966 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4967 * @param conn_latency, default: 4 4968 * @param supervision_timeout (unit: 10ms), default: 720 ms 4969 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4970 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4971 */ 4972 4973 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4974 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4975 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4976 hci_stack->le_connection_scan_interval = conn_scan_interval; 4977 hci_stack->le_connection_scan_window = conn_scan_window; 4978 hci_stack->le_connection_interval_min = conn_interval_min; 4979 hci_stack->le_connection_interval_max = conn_interval_max; 4980 hci_stack->le_connection_latency = conn_latency; 4981 hci_stack->le_supervision_timeout = supervision_timeout; 4982 hci_stack->le_minimum_ce_length = min_ce_length; 4983 hci_stack->le_maximum_ce_length = max_ce_length; 4984 } 4985 #endif 4986 4987 /** 4988 * @brief Updates the connection parameters for a given LE connection 4989 * @param handle 4990 * @param conn_interval_min (unit: 1.25ms) 4991 * @param conn_interval_max (unit: 1.25ms) 4992 * @param conn_latency 4993 * @param supervision_timeout (unit: 10ms) 4994 * @returns 0 if ok 4995 */ 4996 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4997 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4998 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4999 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5000 connection->le_conn_interval_min = conn_interval_min; 5001 connection->le_conn_interval_max = conn_interval_max; 5002 connection->le_conn_latency = conn_latency; 5003 connection->le_supervision_timeout = supervision_timeout; 5004 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5005 hci_run(); 5006 return 0; 5007 } 5008 5009 /** 5010 * @brief Request an update of the connection parameter for a given LE connection 5011 * @param handle 5012 * @param conn_interval_min (unit: 1.25ms) 5013 * @param conn_interval_max (unit: 1.25ms) 5014 * @param conn_latency 5015 * @param supervision_timeout (unit: 10ms) 5016 * @returns 0 if ok 5017 */ 5018 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5019 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5020 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5021 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5022 connection->le_conn_interval_min = conn_interval_min; 5023 connection->le_conn_interval_max = conn_interval_max; 5024 connection->le_conn_latency = conn_latency; 5025 connection->le_supervision_timeout = supervision_timeout; 5026 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5027 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5028 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5029 return 0; 5030 } 5031 5032 #ifdef ENABLE_LE_PERIPHERAL 5033 5034 static void gap_advertisments_changed(void){ 5035 // disable advertisements before updating adv, scan data, or adv params 5036 if (hci_stack->le_advertisements_active){ 5037 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 5038 } 5039 hci_run(); 5040 } 5041 5042 /** 5043 * @brief Set Advertisement Data 5044 * @param advertising_data_length 5045 * @param advertising_data (max 31 octets) 5046 * @note data is not copied, pointer has to stay valid 5047 */ 5048 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5049 hci_stack->le_advertisements_data_len = advertising_data_length; 5050 hci_stack->le_advertisements_data = advertising_data; 5051 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5052 gap_advertisments_changed(); 5053 } 5054 5055 /** 5056 * @brief Set Scan Response Data 5057 * @param advertising_data_length 5058 * @param advertising_data (max 31 octets) 5059 * @note data is not copied, pointer has to stay valid 5060 */ 5061 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5062 hci_stack->le_scan_response_data_len = scan_response_data_length; 5063 hci_stack->le_scan_response_data = scan_response_data; 5064 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5065 gap_advertisments_changed(); 5066 } 5067 5068 /** 5069 * @brief Set Advertisement Parameters 5070 * @param adv_int_min 5071 * @param adv_int_max 5072 * @param adv_type 5073 * @param direct_address_type 5074 * @param direct_address 5075 * @param channel_map 5076 * @param filter_policy 5077 * 5078 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5079 */ 5080 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5081 uint8_t direct_address_typ, bd_addr_t direct_address, 5082 uint8_t channel_map, uint8_t filter_policy) { 5083 5084 hci_stack->le_advertisements_interval_min = adv_int_min; 5085 hci_stack->le_advertisements_interval_max = adv_int_max; 5086 hci_stack->le_advertisements_type = adv_type; 5087 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5088 hci_stack->le_advertisements_channel_map = channel_map; 5089 hci_stack->le_advertisements_filter_policy = filter_policy; 5090 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5091 6); 5092 5093 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5094 gap_advertisments_changed(); 5095 } 5096 5097 /** 5098 * @brief Enable/Disable Advertisements 5099 * @param enabled 5100 */ 5101 void gap_advertisements_enable(int enabled){ 5102 hci_stack->le_advertisements_enabled = enabled; 5103 if (enabled && !hci_stack->le_advertisements_active){ 5104 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 5105 } 5106 if (!enabled && hci_stack->le_advertisements_active){ 5107 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 5108 } 5109 hci_run(); 5110 } 5111 5112 #endif 5113 5114 void hci_le_set_own_address_type(uint8_t own_address_type){ 5115 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5116 if (own_address_type == hci_stack->le_own_addr_type) return; 5117 hci_stack->le_own_addr_type = own_address_type; 5118 5119 #ifdef ENABLE_LE_PERIPHERAL 5120 // update advertisement parameters, too 5121 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5122 gap_advertisments_changed(); 5123 #endif 5124 #ifdef ENABLE_LE_CENTRAL 5125 // note: we don't update scan parameters or modify ongoing connection attempts 5126 #endif 5127 } 5128 5129 #endif 5130 5131 uint8_t gap_disconnect(hci_con_handle_t handle){ 5132 hci_connection_t * conn = hci_connection_for_handle(handle); 5133 if (!conn){ 5134 hci_emit_disconnection_complete(handle, 0); 5135 return 0; 5136 } 5137 // ignore if already disconnected 5138 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5139 return 0; 5140 } 5141 conn->state = SEND_DISCONNECT; 5142 hci_run(); 5143 return 0; 5144 } 5145 5146 int gap_read_rssi(hci_con_handle_t con_handle){ 5147 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5148 if (hci_connection == NULL) return 0; 5149 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5150 hci_run(); 5151 return 1; 5152 } 5153 5154 /** 5155 * @brief Get connection type 5156 * @param con_handle 5157 * @result connection_type 5158 */ 5159 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5160 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5161 if (!conn) return GAP_CONNECTION_INVALID; 5162 switch (conn->address_type){ 5163 case BD_ADDR_TYPE_LE_PUBLIC: 5164 case BD_ADDR_TYPE_LE_RANDOM: 5165 return GAP_CONNECTION_LE; 5166 case BD_ADDR_TYPE_SCO: 5167 return GAP_CONNECTION_SCO; 5168 case BD_ADDR_TYPE_ACL: 5169 return GAP_CONNECTION_ACL; 5170 default: 5171 return GAP_CONNECTION_INVALID; 5172 } 5173 } 5174 5175 #ifdef ENABLE_BLE 5176 5177 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){ 5178 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5179 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5180 5181 conn->le_phy_update_all_phys = all_phys; 5182 conn->le_phy_update_tx_phys = tx_phys; 5183 conn->le_phy_update_rx_phys = rx_phys; 5184 conn->le_phy_update_phy_options = phy_options; 5185 5186 hci_run(); 5187 5188 return 0; 5189 } 5190 5191 #ifdef ENABLE_LE_CENTRAL 5192 /** 5193 * @brief Auto Connection Establishment - Start Connecting to device 5194 * @param address_typ 5195 * @param address 5196 * @returns 0 if ok 5197 */ 5198 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 5199 // check capacity 5200 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 5201 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 5202 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5203 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5204 entry->address_type = address_type; 5205 (void)memcpy(entry->address, address, 6); 5206 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5207 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5208 hci_run(); 5209 return 0; 5210 } 5211 5212 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 5213 btstack_linked_list_iterator_t it; 5214 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5215 while (btstack_linked_list_iterator_has_next(&it)){ 5216 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5217 if (entry->address_type != address_type) continue; 5218 if (memcmp(entry->address, address, 6) != 0) continue; 5219 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5220 // remove from controller if already present 5221 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5222 continue; 5223 } 5224 // direclty remove entry from whitelist 5225 btstack_linked_list_iterator_remove(&it); 5226 btstack_memory_whitelist_entry_free(entry); 5227 } 5228 } 5229 5230 /** 5231 * @brief Auto Connection Establishment - Stop Connecting to device 5232 * @param address_typ 5233 * @param address 5234 * @returns 0 if ok 5235 */ 5236 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 5237 hci_remove_from_whitelist(address_type, address); 5238 hci_run(); 5239 return 0; 5240 } 5241 5242 /** 5243 * @brief Auto Connection Establishment - Stop everything 5244 * @note Convenience function to stop all active auto connection attempts 5245 */ 5246 void gap_auto_connection_stop_all(void){ 5247 btstack_linked_list_iterator_t it; 5248 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5249 while (btstack_linked_list_iterator_has_next(&it)){ 5250 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5251 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5252 // remove from controller if already present 5253 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5254 continue; 5255 } 5256 // directly remove entry from whitelist 5257 btstack_linked_list_iterator_remove(&it); 5258 btstack_memory_whitelist_entry_free(entry); 5259 } 5260 hci_run(); 5261 } 5262 5263 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5264 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5265 if (!conn) return 0; 5266 return conn->le_connection_interval; 5267 } 5268 #endif 5269 #endif 5270 5271 #ifdef ENABLE_CLASSIC 5272 /** 5273 * @brief Set Extended Inquiry Response data 5274 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5275 * @note has to be done before stack starts up 5276 */ 5277 void gap_set_extended_inquiry_response(const uint8_t * data){ 5278 hci_stack->eir_data = data; 5279 } 5280 5281 /** 5282 * @brief Start GAP Classic Inquiry 5283 * @param duration in 1.28s units 5284 * @return 0 if ok 5285 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5286 */ 5287 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5288 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5289 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5290 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5291 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5292 } 5293 hci_stack->inquiry_state = duration_in_1280ms_units; 5294 hci_run(); 5295 return 0; 5296 } 5297 5298 /** 5299 * @brief Stop GAP Classic Inquiry 5300 * @returns 0 if ok 5301 */ 5302 int gap_inquiry_stop(void){ 5303 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5304 // emit inquiry complete event, before it even started 5305 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5306 hci_emit_event(event, sizeof(event), 1); 5307 return 0; 5308 } 5309 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5310 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5311 hci_run(); 5312 return 0; 5313 } 5314 5315 5316 /** 5317 * @brief Remote Name Request 5318 * @param addr 5319 * @param page_scan_repetition_mode 5320 * @param clock_offset only used when bit 15 is set 5321 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5322 */ 5323 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5324 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5325 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5326 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5327 hci_stack->remote_name_clock_offset = clock_offset; 5328 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5329 hci_run(); 5330 return 0; 5331 } 5332 5333 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 5334 hci_stack->gap_pairing_state = state; 5335 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5336 hci_run(); 5337 return 0; 5338 } 5339 5340 /** 5341 * @brief Legacy Pairing Pin Code Response 5342 * @param addr 5343 * @param pin 5344 * @return 0 if ok 5345 */ 5346 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 5347 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5348 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 5349 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5350 } 5351 5352 /** 5353 * @brief Abort Legacy Pairing 5354 * @param addr 5355 * @param pin 5356 * @return 0 if ok 5357 */ 5358 int gap_pin_code_negative(bd_addr_t addr){ 5359 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5360 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5361 } 5362 5363 /** 5364 * @brief SSP Passkey Response 5365 * @param addr 5366 * @param passkey 5367 * @return 0 if ok 5368 */ 5369 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5370 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5371 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5372 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5373 } 5374 5375 /** 5376 * @brief Abort SSP Passkey Entry/Pairing 5377 * @param addr 5378 * @param pin 5379 * @return 0 if ok 5380 */ 5381 int gap_ssp_passkey_negative(bd_addr_t addr){ 5382 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5383 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5384 } 5385 5386 /** 5387 * @brief Accept SSP Numeric Comparison 5388 * @param addr 5389 * @param passkey 5390 * @return 0 if ok 5391 */ 5392 int gap_ssp_confirmation_response(bd_addr_t addr){ 5393 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5394 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5395 } 5396 5397 /** 5398 * @brief Abort SSP Numeric Comparison/Pairing 5399 * @param addr 5400 * @param pin 5401 * @return 0 if ok 5402 */ 5403 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5404 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5405 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5406 } 5407 5408 /** 5409 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5410 * @param inquiry_mode see bluetooth_defines.h 5411 */ 5412 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5413 hci_stack->inquiry_mode = mode; 5414 } 5415 5416 /** 5417 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5418 */ 5419 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5420 hci_stack->sco_voice_setting = voice_setting; 5421 } 5422 5423 /** 5424 * @brief Get SCO Voice Setting 5425 * @return current voice setting 5426 */ 5427 uint16_t hci_get_sco_voice_setting(void){ 5428 return hci_stack->sco_voice_setting; 5429 } 5430 5431 static int hci_have_usb_transport(void){ 5432 if (!hci_stack->hci_transport) return 0; 5433 const char * transport_name = hci_stack->hci_transport->name; 5434 if (!transport_name) return 0; 5435 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5436 } 5437 5438 /** @brief Get SCO packet length for current SCO Voice setting 5439 * @note Using SCO packets of the exact length is required for USB transfer 5440 * @return Length of SCO packets in bytes (not audio frames) 5441 */ 5442 int hci_get_sco_packet_length(void){ 5443 int sco_packet_length = 0; 5444 5445 #ifdef ENABLE_SCO_OVER_HCI 5446 5447 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5448 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5449 5450 if (hci_have_usb_transport()){ 5451 // see Core Spec for H2 USB Transfer. 5452 // 3 byte SCO header + 24 bytes per connection 5453 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5454 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5455 } else { 5456 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5457 sco_packet_length = 3 + 60 * multiplier; 5458 // assert that it still fits inside an SCO buffer 5459 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5460 sco_packet_length = 3 + 60; 5461 } 5462 } 5463 #endif 5464 return sco_packet_length; 5465 } 5466 5467 /** 5468 * @brief Sets the master/slave policy 5469 * @param policy (0: attempt to become master, 1: let connecting device decide) 5470 */ 5471 void hci_set_master_slave_policy(uint8_t policy){ 5472 hci_stack->master_slave_policy = policy; 5473 } 5474 5475 #endif 5476 5477 HCI_STATE hci_get_state(void){ 5478 return hci_stack->state; 5479 } 5480 5481 #ifdef ENABLE_CLASSIC 5482 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5483 hci_stack->gap_classic_accept_callback = accept_callback; 5484 } 5485 #endif 5486 5487 /** 5488 * @brief Set callback for Bluetooth Hardware Error 5489 */ 5490 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5491 hci_stack->hardware_error_callback = fn; 5492 } 5493 5494 void hci_disconnect_all(void){ 5495 btstack_linked_list_iterator_t it; 5496 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5497 while (btstack_linked_list_iterator_has_next(&it)){ 5498 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5499 if (con->state == SENT_DISCONNECT) continue; 5500 con->state = SEND_DISCONNECT; 5501 } 5502 hci_run(); 5503 } 5504 5505 uint16_t hci_get_manufacturer(void){ 5506 return hci_stack->manufacturer; 5507 } 5508 5509 #ifdef ENABLE_BLE 5510 5511 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5512 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5513 if (!hci_con) return NULL; 5514 return &hci_con->sm_connection; 5515 } 5516 5517 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5518 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5519 5520 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5521 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5522 if (hci_connection == NULL) return 0; 5523 if (hci_is_le_connection(hci_connection)){ 5524 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5525 if (sm_conn->sm_connection_encrypted) { 5526 return sm_conn->sm_actual_encryption_key_size; 5527 } 5528 } 5529 #ifdef ENABLE_CLASSIC 5530 else { 5531 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5532 return hci_connection->encryption_key_size; 5533 } 5534 } 5535 #endif 5536 return 0; 5537 } 5538 5539 int gap_authenticated(hci_con_handle_t con_handle){ 5540 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5541 if (hci_connection == NULL) return 0; 5542 5543 switch (hci_connection->address_type){ 5544 case BD_ADDR_TYPE_LE_PUBLIC: 5545 case BD_ADDR_TYPE_LE_RANDOM: 5546 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5547 return hci_connection->sm_connection.sm_connection_authenticated; 5548 #ifdef ENABLE_CLASSIC 5549 case BD_ADDR_TYPE_SCO: 5550 case BD_ADDR_TYPE_ACL: 5551 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5552 #endif 5553 default: 5554 return 0; 5555 } 5556 } 5557 5558 int gap_secure_connection(hci_con_handle_t con_handle){ 5559 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5560 if (hci_connection == NULL) return 0; 5561 5562 switch (hci_connection->address_type){ 5563 case BD_ADDR_TYPE_LE_PUBLIC: 5564 case BD_ADDR_TYPE_LE_RANDOM: 5565 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5566 return hci_connection->sm_connection.sm_connection_sc; 5567 #ifdef ENABLE_CLASSIC 5568 case BD_ADDR_TYPE_SCO: 5569 case BD_ADDR_TYPE_ACL: 5570 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5571 #endif 5572 default: 5573 return 0; 5574 } 5575 } 5576 5577 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5578 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5579 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5580 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5581 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5582 return sm_conn->sm_connection_authorization_state; 5583 } 5584 #endif 5585 5586 #ifdef ENABLE_CLASSIC 5587 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){ 5588 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5589 if (!conn) return GAP_CONNECTION_INVALID; 5590 conn->sniff_min_interval = sniff_min_interval; 5591 conn->sniff_max_interval = sniff_max_interval; 5592 conn->sniff_attempt = sniff_attempt; 5593 conn->sniff_timeout = sniff_timeout; 5594 hci_run(); 5595 return 0; 5596 } 5597 5598 /** 5599 * @brief Exit Sniff mode 5600 * @param con_handle 5601 @ @return 0 if ok 5602 */ 5603 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5604 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5605 if (!conn) return GAP_CONNECTION_INVALID; 5606 conn->sniff_min_interval = 0xffff; 5607 hci_run(); 5608 return 0; 5609 } 5610 #endif 5611 5612 void hci_halting_defer(void){ 5613 if (hci_stack->state != HCI_STATE_HALTING) return; 5614 switch (hci_stack->substate){ 5615 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5616 case HCI_HALTING_CLOSE: 5617 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5618 break; 5619 default: 5620 break; 5621 } 5622 } 5623 5624 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 5625 void hci_setup_test_connections_fuzz(void){ 5626 hci_connection_t * conn; 5627 5628 // default address: 66:55:44:33:00:01 5629 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 5630 5631 // setup Controller info 5632 hci_stack->num_cmd_packets = 255; 5633 hci_stack->acl_packets_total_num = 255; 5634 5635 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 5636 addr[5] = 0x01; 5637 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5638 conn->con_handle = addr[5]; 5639 conn->role = HCI_ROLE_SLAVE; 5640 conn->state = RECEIVED_CONNECTION_REQUEST; 5641 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5642 5643 // setup incoming Classic SCO connection with con handle 0x0002 5644 addr[5] = 0x02; 5645 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5646 conn->con_handle = addr[5]; 5647 conn->role = HCI_ROLE_SLAVE; 5648 conn->state = RECEIVED_CONNECTION_REQUEST; 5649 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5650 5651 // setup ready Classic ACL connection with con handle 0x0003 5652 addr[5] = 0x03; 5653 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5654 conn->con_handle = addr[5]; 5655 conn->role = HCI_ROLE_SLAVE; 5656 conn->state = OPEN; 5657 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5658 5659 // setup ready Classic SCO connection with con handle 0x0004 5660 addr[5] = 0x04; 5661 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5662 conn->con_handle = addr[5]; 5663 conn->role = HCI_ROLE_SLAVE; 5664 conn->state = OPEN; 5665 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5666 5667 // setup ready LE ACL connection with con handle 0x005 and public address 5668 addr[5] = 0x05; 5669 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 5670 conn->con_handle = addr[5]; 5671 conn->role = HCI_ROLE_SLAVE; 5672 conn->state = OPEN; 5673 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5674 } 5675 5676 void hci_free_connections_fuzz(void){ 5677 btstack_linked_list_iterator_t it; 5678 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5679 while (btstack_linked_list_iterator_has_next(&it)){ 5680 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5681 btstack_linked_list_iterator_remove(&it); 5682 btstack_memory_hci_connection_free(con); 5683 } 5684 } 5685 void hci_simulate_working_fuzz(void){ 5686 hci_init_done(); 5687 hci_stack->num_cmd_packets = 255; 5688 } 5689 #endif 5690