1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #endif 63 64 #include <stdarg.h> 65 #include <string.h> 66 #include <stdio.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 #define HCI_RESET_RESEND_TIMEOUT_MS 200 98 99 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 100 #ifndef GAP_INQUIRY_MAX_NAME_LEN 101 #define GAP_INQUIRY_MAX_NAME_LEN 32 102 #endif 103 104 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 105 #define GAP_INQUIRY_DURATION_MIN 0x01 106 #define GAP_INQUIRY_DURATION_MAX 0x30 107 #define GAP_INQUIRY_STATE_ACTIVE 0x80 108 #define GAP_INQUIRY_STATE_IDLE 0 109 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 110 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 111 112 // GAP Remote Name Request 113 #define GAP_REMOTE_NAME_STATE_IDLE 0 114 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 115 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 116 117 // GAP Pairing 118 #define GAP_PAIRING_STATE_IDLE 0 119 #define GAP_PAIRING_STATE_SEND_PIN 1 120 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 121 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 122 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 123 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 124 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 125 126 127 // prototypes 128 #ifdef ENABLE_CLASSIC 129 static void hci_update_scan_enable(void); 130 static void hci_emit_discoverable_enabled(uint8_t enabled); 131 static int hci_local_ssp_activated(void); 132 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 133 static void hci_notify_if_sco_can_send_now(void); 134 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 135 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 136 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 137 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 138 static void hci_connection_timestamp(hci_connection_t *connection); 139 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 140 static void gap_inquiry_explode(uint8_t * packet); 141 #endif 142 143 static int hci_power_control_on(void); 144 static void hci_power_control_off(void); 145 static void hci_state_reset(void); 146 static void hci_emit_transport_packet_sent(void); 147 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 148 static void hci_emit_nr_connections_changed(void); 149 static void hci_emit_hci_open_failed(void); 150 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 151 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 152 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 153 static void hci_run(void); 154 static int hci_is_le_connection(hci_connection_t * connection); 155 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 156 157 #ifdef ENABLE_CLASSIC 158 static int hci_have_usb_transport(void); 159 #endif 160 161 #ifdef ENABLE_BLE 162 #ifdef ENABLE_LE_CENTRAL 163 // called from test/ble_client/advertising_data_parser.c 164 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 165 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 166 static hci_connection_t * gap_get_outgoing_connection(void); 167 #endif 168 #endif 169 170 // the STACK is here 171 #ifndef HAVE_MALLOC 172 static hci_stack_t hci_stack_static; 173 #endif 174 static hci_stack_t * hci_stack = NULL; 175 176 #ifdef ENABLE_CLASSIC 177 // default name 178 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 179 180 // test helper 181 static uint8_t disable_l2cap_timeouts = 0; 182 #endif 183 184 /** 185 * create connection for given address 186 * 187 * @return connection OR NULL, if no memory left 188 */ 189 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 190 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 191 hci_connection_t * conn = btstack_memory_hci_connection_get(); 192 if (!conn) return NULL; 193 bd_addr_copy(conn->address, addr); 194 conn->address_type = addr_type; 195 conn->con_handle = 0xffff; 196 conn->authentication_flags = AUTH_FLAGS_NONE; 197 conn->bonding_flags = 0; 198 conn->requested_security_level = LEVEL_0; 199 #ifdef ENABLE_CLASSIC 200 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 201 btstack_run_loop_set_timer_context(&conn->timeout, conn); 202 hci_connection_timestamp(conn); 203 #endif 204 conn->acl_recombination_length = 0; 205 conn->acl_recombination_pos = 0; 206 conn->num_packets_sent = 0; 207 208 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 209 #ifdef ENABLE_BLE 210 conn->le_phy_update_all_phys = 0xff; 211 #endif 212 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 213 return conn; 214 } 215 216 217 /** 218 * get le connection parameter range 219 * 220 * @return le connection parameter range struct 221 */ 222 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 223 *range = hci_stack->le_connection_parameter_range; 224 } 225 226 /** 227 * set le connection parameter range 228 * 229 */ 230 231 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 232 hci_stack->le_connection_parameter_range = *range; 233 } 234 235 /** 236 * @brief Test if connection parameters are inside in existing rage 237 * @param conn_interval_min (unit: 1.25ms) 238 * @param conn_interval_max (unit: 1.25ms) 239 * @param conn_latency 240 * @param supervision_timeout (unit: 10ms) 241 * @returns 1 if included 242 */ 243 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){ 244 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 245 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 246 247 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 248 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 249 250 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 251 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 252 253 return 1; 254 } 255 256 /** 257 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 258 * @note: default: 1 259 * @param max_peripheral_connections 260 */ 261 #ifdef ENABLE_LE_PERIPHERAL 262 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 263 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 264 } 265 #endif 266 267 /** 268 * get hci connections iterator 269 * 270 * @return hci connections iterator 271 */ 272 273 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 274 btstack_linked_list_iterator_init(it, &hci_stack->connections); 275 } 276 277 /** 278 * get connection for a given handle 279 * 280 * @return connection OR NULL, if not found 281 */ 282 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 283 btstack_linked_list_iterator_t it; 284 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 285 while (btstack_linked_list_iterator_has_next(&it)){ 286 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 287 if ( item->con_handle == con_handle ) { 288 return item; 289 } 290 } 291 return NULL; 292 } 293 294 /** 295 * get connection for given address 296 * 297 * @return connection OR NULL, if not found 298 */ 299 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 300 btstack_linked_list_iterator_t it; 301 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 302 while (btstack_linked_list_iterator_has_next(&it)){ 303 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 304 if (connection->address_type != addr_type) continue; 305 if (memcmp(addr, connection->address, 6) != 0) continue; 306 return connection; 307 } 308 return NULL; 309 } 310 311 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 312 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 313 } 314 315 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 316 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 317 } 318 319 #ifdef ENABLE_CLASSIC 320 321 #ifdef ENABLE_SCO_OVER_HCI 322 static int hci_number_sco_connections(void){ 323 int connections = 0; 324 btstack_linked_list_iterator_t it; 325 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 326 while (btstack_linked_list_iterator_has_next(&it)){ 327 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 328 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 329 connections++; 330 } 331 return connections; 332 } 333 #endif 334 335 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 336 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 337 #ifdef HAVE_EMBEDDED_TICK 338 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 339 // connections might be timed out 340 hci_emit_l2cap_check_timeout(connection); 341 } 342 #else 343 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 344 // connections might be timed out 345 hci_emit_l2cap_check_timeout(connection); 346 } 347 #endif 348 } 349 350 static void hci_connection_timestamp(hci_connection_t *connection){ 351 #ifdef HAVE_EMBEDDED_TICK 352 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 353 #else 354 connection->timestamp = btstack_run_loop_get_time_ms(); 355 #endif 356 } 357 358 /** 359 * add authentication flags and reset timer 360 * @note: assumes classic connection 361 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 362 */ 363 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 364 bd_addr_t addr; 365 reverse_bd_addr(bd_addr, addr); 366 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 367 if (conn) { 368 connectionSetAuthenticationFlags(conn, flags); 369 hci_connection_timestamp(conn); 370 } 371 } 372 373 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 374 hci_connection_t * conn = hci_connection_for_handle(handle); 375 if (!conn) return 0; 376 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 377 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 378 return 0; 379 } 380 381 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 382 if (!hci_stack->link_key_db) return; 383 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 384 hci_stack->link_key_db->delete_link_key(addr); 385 } 386 387 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 388 if (!hci_stack->link_key_db) return; 389 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 390 hci_stack->link_key_db->put_link_key(addr, link_key, type); 391 } 392 393 void gap_delete_all_link_keys(void){ 394 bd_addr_t addr; 395 link_key_t link_key; 396 link_key_type_t type; 397 btstack_link_key_iterator_t it; 398 int ok = gap_link_key_iterator_init(&it); 399 if (!ok) { 400 log_error("could not initialize iterator"); 401 return; 402 } 403 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 404 gap_drop_link_key_for_bd_addr(addr); 405 } 406 gap_link_key_iterator_done(&it); 407 } 408 409 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 410 if (!hci_stack->link_key_db) return 0; 411 if (!hci_stack->link_key_db->iterator_init) return 0; 412 return hci_stack->link_key_db->iterator_init(it); 413 } 414 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){ 415 if (!hci_stack->link_key_db) return 0; 416 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 417 } 418 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 419 if (!hci_stack->link_key_db) return; 420 hci_stack->link_key_db->iterator_done(it); 421 } 422 #endif 423 424 static int hci_is_le_connection(hci_connection_t * connection){ 425 switch (connection->address_type){ 426 case BD_ADDR_TYPE_LE_PUBLIC: 427 case BD_ADDR_TYPE_LE_RANDOM: 428 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 429 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 430 return 1; 431 default: 432 return 0; 433 } 434 } 435 436 /** 437 * count connections 438 */ 439 static int nr_hci_connections(void){ 440 int count = 0; 441 btstack_linked_item_t *it; 442 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 443 return count; 444 } 445 446 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 447 448 unsigned int num_packets_sent_classic = 0; 449 unsigned int num_packets_sent_le = 0; 450 451 btstack_linked_item_t *it; 452 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 453 hci_connection_t * connection = (hci_connection_t *) it; 454 if (hci_is_le_connection(connection)){ 455 num_packets_sent_le += connection->num_packets_sent; 456 } 457 if (connection->address_type == BD_ADDR_TYPE_ACL){ 458 num_packets_sent_classic += connection->num_packets_sent; 459 } 460 } 461 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 462 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 463 int free_slots_le = 0; 464 465 if (free_slots_classic < 0){ 466 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); 467 return 0; 468 } 469 470 if (hci_stack->le_acl_packets_total_num){ 471 // if we have LE slots, they are used 472 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 473 if (free_slots_le < 0){ 474 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); 475 return 0; 476 } 477 } else { 478 // otherwise, classic slots are used for LE, too 479 free_slots_classic -= num_packets_sent_le; 480 if (free_slots_classic < 0){ 481 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); 482 return 0; 483 } 484 } 485 486 switch (address_type){ 487 case BD_ADDR_TYPE_UNKNOWN: 488 log_error("hci_number_free_acl_slots: unknown address type"); 489 return 0; 490 491 case BD_ADDR_TYPE_ACL: 492 return free_slots_classic; 493 494 default: 495 if (hci_stack->le_acl_packets_total_num){ 496 return free_slots_le; 497 } 498 return free_slots_classic; 499 } 500 } 501 502 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 503 // get connection type 504 hci_connection_t * connection = hci_connection_for_handle(con_handle); 505 if (!connection){ 506 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 507 return 0; 508 } 509 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 510 } 511 512 #ifdef ENABLE_CLASSIC 513 static int hci_number_free_sco_slots(void){ 514 unsigned int num_sco_packets_sent = 0; 515 btstack_linked_item_t *it; 516 if (hci_stack->synchronous_flow_control_enabled){ 517 // explicit flow control 518 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 519 hci_connection_t * connection = (hci_connection_t *) it; 520 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 521 num_sco_packets_sent += connection->num_packets_sent; 522 } 523 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 524 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 525 return 0; 526 } 527 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 528 } else { 529 // implicit flow control -- TODO 530 int num_ready = 0; 531 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 532 hci_connection_t * connection = (hci_connection_t *) it; 533 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 534 if (connection->sco_tx_ready == 0) continue; 535 num_ready++; 536 } 537 return num_ready; 538 } 539 } 540 #endif 541 542 // only used to send HCI Host Number Completed Packets 543 static int hci_can_send_comand_packet_transport(void){ 544 if (hci_stack->hci_packet_buffer_reserved) return 0; 545 546 // check for async hci transport implementations 547 if (hci_stack->hci_transport->can_send_packet_now){ 548 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 549 return 0; 550 } 551 } 552 return 1; 553 } 554 555 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 556 int hci_can_send_command_packet_now(void){ 557 if (hci_can_send_comand_packet_transport() == 0) return 0; 558 return hci_stack->num_cmd_packets > 0; 559 } 560 561 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 562 // check for async hci transport implementations 563 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 564 return hci_stack->hci_transport->can_send_packet_now(packet_type); 565 } 566 567 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 568 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 569 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 570 } 571 572 int hci_can_send_acl_le_packet_now(void){ 573 if (hci_stack->hci_packet_buffer_reserved) return 0; 574 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 575 } 576 577 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 578 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 579 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 580 } 581 582 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 583 if (hci_stack->hci_packet_buffer_reserved) return 0; 584 return hci_can_send_prepared_acl_packet_now(con_handle); 585 } 586 587 #ifdef ENABLE_CLASSIC 588 int hci_can_send_acl_classic_packet_now(void){ 589 if (hci_stack->hci_packet_buffer_reserved) return 0; 590 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 591 } 592 593 int hci_can_send_prepared_sco_packet_now(void){ 594 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 595 if (hci_have_usb_transport()){ 596 return hci_stack->sco_can_send_now; 597 } else { 598 return hci_number_free_sco_slots() > 0; 599 } 600 } 601 602 int hci_can_send_sco_packet_now(void){ 603 if (hci_stack->hci_packet_buffer_reserved) return 0; 604 return hci_can_send_prepared_sco_packet_now(); 605 } 606 607 void hci_request_sco_can_send_now_event(void){ 608 hci_stack->sco_waiting_for_can_send_now = 1; 609 hci_notify_if_sco_can_send_now(); 610 } 611 #endif 612 613 // used for internal checks in l2cap.c 614 int hci_is_packet_buffer_reserved(void){ 615 return hci_stack->hci_packet_buffer_reserved; 616 } 617 618 // reserves outgoing packet buffer. @returns 1 if successful 619 int hci_reserve_packet_buffer(void){ 620 if (hci_stack->hci_packet_buffer_reserved) { 621 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 622 return 0; 623 } 624 hci_stack->hci_packet_buffer_reserved = 1; 625 return 1; 626 } 627 628 void hci_release_packet_buffer(void){ 629 hci_stack->hci_packet_buffer_reserved = 0; 630 } 631 632 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 633 static int hci_transport_synchronous(void){ 634 return hci_stack->hci_transport->can_send_packet_now == NULL; 635 } 636 637 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 638 639 // 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); 640 641 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 642 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 643 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 644 max_acl_data_packet_length = hci_stack->le_data_packets_length; 645 } 646 647 // testing: reduce buffer to minimum 648 // max_acl_data_packet_length = 52; 649 650 log_debug("hci_send_acl_packet_fragments entered"); 651 652 int err; 653 // multiple packets could be send on a synchronous HCI transport 654 while (1){ 655 656 log_debug("hci_send_acl_packet_fragments loop entered"); 657 658 // get current data 659 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 660 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 661 int more_fragments = 0; 662 663 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 664 if (current_acl_data_packet_length > max_acl_data_packet_length){ 665 more_fragments = 1; 666 current_acl_data_packet_length = max_acl_data_packet_length; 667 } 668 669 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 670 if (acl_header_pos > 0){ 671 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 672 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 673 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 674 } 675 676 // update header len 677 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 678 679 // count packet 680 connection->num_packets_sent++; 681 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 682 683 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 684 if (more_fragments){ 685 // update start of next fragment to send 686 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 687 } else { 688 // done 689 hci_stack->acl_fragmentation_pos = 0; 690 hci_stack->acl_fragmentation_total_size = 0; 691 } 692 693 // send packet 694 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 695 const int size = current_acl_data_packet_length + 4; 696 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 697 hci_stack->acl_fragmentation_tx_active = 1; 698 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 699 700 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 701 702 // done yet? 703 if (!more_fragments) break; 704 705 // can send more? 706 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 707 } 708 709 log_debug("hci_send_acl_packet_fragments loop over"); 710 711 // release buffer now for synchronous transport 712 if (hci_transport_synchronous()){ 713 hci_stack->acl_fragmentation_tx_active = 0; 714 hci_release_packet_buffer(); 715 hci_emit_transport_packet_sent(); 716 } 717 718 return err; 719 } 720 721 // pre: caller has reserved the packet buffer 722 int hci_send_acl_packet_buffer(int size){ 723 724 // log_info("hci_send_acl_packet_buffer size %u", size); 725 726 if (!hci_stack->hci_packet_buffer_reserved) { 727 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 728 return 0; 729 } 730 731 uint8_t * packet = hci_stack->hci_packet_buffer; 732 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 733 734 // check for free places on Bluetooth module 735 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 736 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 737 hci_release_packet_buffer(); 738 hci_emit_transport_packet_sent(); 739 return BTSTACK_ACL_BUFFERS_FULL; 740 } 741 742 hci_connection_t *connection = hci_connection_for_handle( con_handle); 743 if (!connection) { 744 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 745 hci_release_packet_buffer(); 746 hci_emit_transport_packet_sent(); 747 return 0; 748 } 749 750 #ifdef ENABLE_CLASSIC 751 hci_connection_timestamp(connection); 752 #endif 753 754 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 755 756 // setup data 757 hci_stack->acl_fragmentation_total_size = size; 758 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 759 760 return hci_send_acl_packet_fragments(connection); 761 } 762 763 #ifdef ENABLE_CLASSIC 764 // pre: caller has reserved the packet buffer 765 int hci_send_sco_packet_buffer(int size){ 766 767 // log_info("hci_send_acl_packet_buffer size %u", size); 768 769 if (!hci_stack->hci_packet_buffer_reserved) { 770 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 771 return 0; 772 } 773 774 uint8_t * packet = hci_stack->hci_packet_buffer; 775 776 // skip checks in loopback mode 777 if (!hci_stack->loopback_mode){ 778 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 779 780 // check for free places on Bluetooth module 781 if (!hci_can_send_prepared_sco_packet_now()) { 782 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 783 hci_release_packet_buffer(); 784 hci_emit_transport_packet_sent(); 785 return BTSTACK_ACL_BUFFERS_FULL; 786 } 787 788 // track send packet in connection struct 789 hci_connection_t *connection = hci_connection_for_handle( con_handle); 790 if (!connection) { 791 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 792 hci_release_packet_buffer(); 793 hci_emit_transport_packet_sent(); 794 return 0; 795 } 796 797 if (hci_have_usb_transport()){ 798 // token used 799 hci_stack->sco_can_send_now = 0; 800 } else { 801 if (hci_stack->synchronous_flow_control_enabled){ 802 connection->num_packets_sent++; 803 } else { 804 connection->sco_tx_ready--; 805 } 806 } 807 } 808 809 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 810 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 811 812 if (hci_transport_synchronous()){ 813 hci_release_packet_buffer(); 814 hci_emit_transport_packet_sent(); 815 } 816 817 return err; 818 } 819 #endif 820 821 static void acl_handler(uint8_t *packet, int size){ 822 823 // log_info("acl_handler: size %u", size); 824 825 // get info 826 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 827 hci_connection_t *conn = hci_connection_for_handle(con_handle); 828 uint8_t acl_flags = READ_ACL_FLAGS(packet); 829 uint16_t acl_length = READ_ACL_LENGTH(packet); 830 831 // ignore non-registered handle 832 if (!conn){ 833 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 834 return; 835 } 836 837 // assert packet is complete 838 if (acl_length + 4 != size){ 839 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 840 return; 841 } 842 843 #ifdef ENABLE_CLASSIC 844 // update idle timestamp 845 hci_connection_timestamp(conn); 846 #endif 847 848 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 849 hci_stack->host_completed_packets = 1; 850 conn->num_packets_completed++; 851 #endif 852 853 // handle different packet types 854 switch (acl_flags & 0x03) { 855 856 case 0x01: // continuation fragment 857 858 // sanity checks 859 if (conn->acl_recombination_pos == 0) { 860 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 861 return; 862 } 863 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 864 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 865 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 866 conn->acl_recombination_pos = 0; 867 return; 868 } 869 870 // append fragment payload (header already stored) 871 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 872 conn->acl_recombination_pos += acl_length; 873 874 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 875 // conn->acl_recombination_pos, conn->acl_recombination_length); 876 877 // forward complete L2CAP packet if complete. 878 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 879 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 880 // reset recombination buffer 881 conn->acl_recombination_length = 0; 882 conn->acl_recombination_pos = 0; 883 } 884 break; 885 886 case 0x02: { // first fragment 887 888 // sanity check 889 if (conn->acl_recombination_pos) { 890 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 891 conn->acl_recombination_pos = 0; 892 } 893 894 // peek into L2CAP packet! 895 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 896 897 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 898 899 // compare fragment size to L2CAP packet size 900 if (acl_length >= l2cap_length + 4){ 901 // forward fragment as L2CAP packet 902 hci_emit_acl_packet(packet, acl_length + 4); 903 } else { 904 905 if (acl_length > HCI_ACL_BUFFER_SIZE){ 906 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 907 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 908 return; 909 } 910 911 // store first fragment and tweak acl length for complete package 912 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 913 conn->acl_recombination_pos = acl_length + 4; 914 conn->acl_recombination_length = l2cap_length; 915 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 916 } 917 break; 918 919 } 920 default: 921 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 922 return; 923 } 924 925 // execute main loop 926 hci_run(); 927 } 928 929 static void hci_shutdown_connection(hci_connection_t *conn){ 930 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 931 932 #ifdef ENABLE_CLASSIC 933 #ifdef ENABLE_SCO_OVER_HCI 934 int addr_type = conn->address_type; 935 #endif 936 #endif 937 938 btstack_run_loop_remove_timer(&conn->timeout); 939 940 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 941 btstack_memory_hci_connection_free( conn ); 942 943 // now it's gone 944 hci_emit_nr_connections_changed(); 945 946 #ifdef ENABLE_CLASSIC 947 #ifdef ENABLE_SCO_OVER_HCI 948 // update SCO 949 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 950 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 951 } 952 #endif 953 #endif 954 } 955 956 #ifdef ENABLE_CLASSIC 957 958 static const uint16_t packet_type_sizes[] = { 959 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 960 HCI_ACL_DH1_SIZE, 0, 0, 0, 961 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 962 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 963 }; 964 static const uint8_t packet_type_feature_requirement_bit[] = { 965 0, // 3 slot packets 966 1, // 5 slot packets 967 25, // EDR 2 mpbs 968 26, // EDR 3 mbps 969 39, // 3 slot EDR packts 970 40, // 5 slot EDR packet 971 }; 972 static const uint16_t packet_type_feature_packet_mask[] = { 973 0x0f00, // 3 slot packets 974 0xf000, // 5 slot packets 975 0x1102, // EDR 2 mpbs 976 0x2204, // EDR 3 mbps 977 0x0300, // 3 slot EDR packts 978 0x3000, // 5 slot EDR packet 979 }; 980 981 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 982 // enable packet types based on size 983 uint16_t packet_types = 0; 984 unsigned int i; 985 for (i=0;i<16;i++){ 986 if (packet_type_sizes[i] == 0) continue; 987 if (packet_type_sizes[i] <= buffer_size){ 988 packet_types |= 1 << i; 989 } 990 } 991 // disable packet types due to missing local supported features 992 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 993 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 994 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 995 if (feature_set) continue; 996 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 997 packet_types &= ~packet_type_feature_packet_mask[i]; 998 } 999 // flip bits for "may not be used" 1000 packet_types ^= 0x3306; 1001 return packet_types; 1002 } 1003 1004 uint16_t hci_usable_acl_packet_types(void){ 1005 return hci_stack->packet_types; 1006 } 1007 #endif 1008 1009 uint8_t* hci_get_outgoing_packet_buffer(void){ 1010 // hci packet buffer is >= acl data packet length 1011 return hci_stack->hci_packet_buffer; 1012 } 1013 1014 uint16_t hci_max_acl_data_packet_length(void){ 1015 return hci_stack->acl_data_packet_length; 1016 } 1017 1018 #ifdef ENABLE_CLASSIC 1019 int hci_extended_sco_link_supported(void){ 1020 // No. 31, byte 3, bit 7 1021 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1022 } 1023 #endif 1024 1025 int hci_non_flushable_packet_boundary_flag_supported(void){ 1026 // No. 54, byte 6, bit 6 1027 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 1028 } 1029 1030 static int gap_ssp_supported(void){ 1031 // No. 51, byte 6, bit 3 1032 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 1033 } 1034 1035 static int hci_classic_supported(void){ 1036 #ifdef ENABLE_CLASSIC 1037 // No. 37, byte 4, bit 5, = No BR/EDR Support 1038 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1039 #else 1040 return 0; 1041 #endif 1042 } 1043 1044 static int hci_le_supported(void){ 1045 #ifdef ENABLE_BLE 1046 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1047 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1048 #else 1049 return 0; 1050 #endif 1051 } 1052 1053 #ifdef ENABLE_BLE 1054 1055 /** 1056 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1057 */ 1058 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1059 *addr_type = hci_stack->le_own_addr_type; 1060 if (hci_stack->le_own_addr_type){ 1061 memcpy(addr, hci_stack->le_random_address, 6); 1062 } else { 1063 memcpy(addr, hci_stack->local_bd_addr, 6); 1064 } 1065 } 1066 1067 #ifdef ENABLE_LE_CENTRAL 1068 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1069 1070 int offset = 3; 1071 int num_reports = packet[offset]; 1072 offset += 1; 1073 1074 int i; 1075 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1076 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1077 for (i=0; i<num_reports && offset < size;i++){ 1078 // sanity checks on data_length: 1079 uint8_t data_length = packet[offset + 8]; 1080 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1081 if (offset + 9 + data_length + 1 > size) return; 1082 // setup event 1083 uint8_t event_size = 10 + data_length; 1084 int pos = 0; 1085 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1086 event[pos++] = event_size; 1087 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 1088 offset += 8; 1089 pos += 8; 1090 event[pos++] = packet[offset + 1 + data_length]; // rssi 1091 event[pos++] = data_length; 1092 offset++; 1093 memcpy(&event[pos], &packet[offset], data_length); 1094 pos += data_length; 1095 offset += data_length + 1; // rssi 1096 hci_emit_event(event, pos, 1); 1097 } 1098 } 1099 #endif 1100 #endif 1101 1102 #ifdef ENABLE_BLE 1103 #ifdef ENABLE_LE_PERIPHERAL 1104 static void hci_reenable_advertisements_if_needed(void){ 1105 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1106 // get number of active le slave connections 1107 int num_slave_connections = 0; 1108 btstack_linked_list_iterator_t it; 1109 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1110 while (btstack_linked_list_iterator_has_next(&it)){ 1111 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1112 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1113 if (con->state != OPEN) continue; 1114 if (con->role != HCI_ROLE_SLAVE) continue; 1115 if (!hci_is_le_connection(con)) continue; 1116 num_slave_connections++; 1117 } 1118 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1119 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1120 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1121 } 1122 } 1123 } 1124 #endif 1125 #endif 1126 1127 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1128 1129 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1130 if (!hci_stack->config) return 0; 1131 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1132 // Limit baud rate for Broadcom chipsets to 3 mbps 1133 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 1134 baud_rate = 3000000; 1135 } 1136 return baud_rate; 1137 } 1138 1139 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1140 UNUSED(ds); 1141 1142 switch (hci_stack->substate){ 1143 case HCI_INIT_W4_SEND_RESET: 1144 log_info("Resend HCI Reset"); 1145 hci_stack->substate = HCI_INIT_SEND_RESET; 1146 hci_stack->num_cmd_packets = 1; 1147 hci_run(); 1148 break; 1149 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1150 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1151 if (hci_stack->hci_transport->reset_link){ 1152 hci_stack->hci_transport->reset_link(); 1153 } 1154 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1155 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1156 log_info("Resend HCI Reset - CSR Warm Boot"); 1157 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1158 hci_stack->num_cmd_packets = 1; 1159 hci_run(); 1160 break; 1161 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1162 if (hci_stack->hci_transport->set_baudrate){ 1163 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1164 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1165 hci_stack->hci_transport->set_baudrate(baud_rate); 1166 } 1167 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1168 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1169 if (hci_stack->hci_transport->reset_link){ 1170 log_info("Link Reset"); 1171 hci_stack->hci_transport->reset_link(); 1172 } 1173 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1174 hci_run(); 1175 } 1176 break; 1177 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1178 // otherwise continue 1179 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1180 hci_send_cmd(&hci_read_local_supported_commands); 1181 break; 1182 default: 1183 break; 1184 } 1185 } 1186 #endif 1187 1188 static void hci_initializing_next_state(void){ 1189 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1190 } 1191 1192 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_PERIPHERAL) 1193 static void hci_replace_bd_addr_placeholder(uint8_t * data, uint16_t size){ 1194 const int bd_addr_string_len = 17; 1195 int i = 0; 1196 while (i < size - bd_addr_string_len){ 1197 if (memcmp(&data[i], "00:00:00:00:00:00", bd_addr_string_len)) { 1198 i++; 1199 continue; 1200 } 1201 // set real address 1202 memcpy(&data[i], bd_addr_to_str(hci_stack->local_bd_addr), bd_addr_string_len); 1203 i += bd_addr_string_len; 1204 } 1205 } 1206 #endif 1207 1208 // assumption: hci_can_send_command_packet_now() == true 1209 static void hci_initializing_run(void){ 1210 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1211 switch (hci_stack->substate){ 1212 case HCI_INIT_SEND_RESET: 1213 hci_state_reset(); 1214 1215 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1216 // prepare reset if command complete not received in 100ms 1217 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1218 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1219 btstack_run_loop_add_timer(&hci_stack->timeout); 1220 #endif 1221 // send command 1222 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1223 hci_send_cmd(&hci_reset); 1224 break; 1225 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1226 hci_send_cmd(&hci_read_local_version_information); 1227 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1228 break; 1229 case HCI_INIT_SEND_READ_LOCAL_NAME: 1230 hci_send_cmd(&hci_read_local_name); 1231 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1232 break; 1233 1234 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1235 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1236 hci_state_reset(); 1237 // prepare reset if command complete not received in 100ms 1238 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1239 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1240 btstack_run_loop_add_timer(&hci_stack->timeout); 1241 // send command 1242 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1243 hci_send_cmd(&hci_reset); 1244 break; 1245 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1246 hci_state_reset(); 1247 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1248 hci_send_cmd(&hci_reset); 1249 break; 1250 case HCI_INIT_SEND_BAUD_CHANGE: { 1251 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1252 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1253 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1254 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1255 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1256 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1257 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1258 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1259 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1260 btstack_run_loop_add_timer(&hci_stack->timeout); 1261 } 1262 break; 1263 } 1264 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1265 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1266 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1267 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1268 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1269 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1270 break; 1271 } 1272 case HCI_INIT_CUSTOM_INIT: 1273 // Custom initialization 1274 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1275 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1276 int send_cmd = 0; 1277 switch (hci_stack->chipset_result){ 1278 case BTSTACK_CHIPSET_VALID_COMMAND: 1279 send_cmd = 1; 1280 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1281 break; 1282 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1283 send_cmd = 1; 1284 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1285 log_info("CSR Warm Boot"); 1286 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1287 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1288 btstack_run_loop_add_timer(&hci_stack->timeout); 1289 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1290 && hci_stack->config 1291 && hci_stack->chipset 1292 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1293 && hci_stack->hci_transport->set_baudrate 1294 && hci_transport_uart_get_main_baud_rate()){ 1295 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1296 } else { 1297 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1298 } 1299 break; 1300 default: 1301 break; 1302 } 1303 1304 if (send_cmd){ 1305 int size = 3 + hci_stack->hci_packet_buffer[2]; 1306 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1307 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1308 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1309 break; 1310 } 1311 log_info("Init script done"); 1312 1313 // Init script download on Broadcom chipsets causes: 1314 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1315 ( hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION 1316 || hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA) ){ 1317 1318 // - baud rate to reset, restore UART baud rate if needed 1319 int need_baud_change = hci_stack->config 1320 && hci_stack->chipset 1321 && hci_stack->chipset->set_baudrate_command 1322 && hci_stack->hci_transport->set_baudrate 1323 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1324 if (need_baud_change) { 1325 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1326 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1327 hci_stack->hci_transport->set_baudrate(baud_rate); 1328 } 1329 1330 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1331 // -> Work around: wait a few milliseconds here. 1332 log_info("BCM delay after init script"); 1333 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1334 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 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 memcpy(&packet[3], hci_stack->local_name, strlen(hci_stack->local_name)); 1422 // expand '00:00:00:00:00:00' in name with bd_addr 1423 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1424 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1425 break; 1426 } 1427 case HCI_INIT_WRITE_EIR_DATA: { 1428 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1429 hci_reserve_packet_buffer(); 1430 uint8_t * packet = hci_stack->hci_packet_buffer; 1431 // construct HCI Command and send 1432 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1433 hci_stack->last_cmd_opcode = opcode; 1434 packet[0] = opcode & 0xff; 1435 packet[1] = opcode >> 8; 1436 packet[2] = 1 + 240; 1437 packet[3] = 0; // FEC not required 1438 if (hci_stack->eir_data){ 1439 memcpy(&packet[4], hci_stack->eir_data, 240); 1440 } else { 1441 memset(&packet[4], 0, 240); 1442 int name_len = strlen(hci_stack->local_name); 1443 packet[4] = name_len + 1; 1444 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1445 memcpy(&packet[6], hci_stack->local_name, name_len); 1446 } 1447 // expand '00:00:00:00:00:00' in name with bd_addr 1448 hci_replace_bd_addr_placeholder(&packet[4], 240); 1449 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1450 break; 1451 } 1452 case HCI_INIT_WRITE_INQUIRY_MODE: 1453 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1454 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1455 break; 1456 case HCI_INIT_WRITE_SCAN_ENABLE: 1457 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1458 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1459 break; 1460 // only sent if ENABLE_SCO_OVER_HCI is defined 1461 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1462 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1463 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1464 break; 1465 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1466 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1467 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1468 break; 1469 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1470 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1471 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1472 log_info("BCM: Route SCO data via HCI transport"); 1473 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1474 break; 1475 1476 #endif 1477 #ifdef ENABLE_BLE 1478 // LE INIT 1479 case HCI_INIT_LE_READ_BUFFER_SIZE: 1480 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1481 hci_send_cmd(&hci_le_read_buffer_size); 1482 break; 1483 case HCI_INIT_LE_SET_EVENT_MASK: 1484 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1485 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1486 break; 1487 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1488 // LE Supported Host = 1, Simultaneous Host = 0 1489 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1490 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1491 break; 1492 #endif 1493 1494 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1495 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1496 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1497 hci_send_cmd(&hci_le_read_maximum_data_length); 1498 break; 1499 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1500 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1501 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1502 break; 1503 #endif 1504 1505 #ifdef ENABLE_LE_CENTRAL 1506 case HCI_INIT_READ_WHITE_LIST_SIZE: 1507 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1508 hci_send_cmd(&hci_le_read_white_list_size); 1509 break; 1510 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1511 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1512 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1513 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); 1514 break; 1515 #endif 1516 default: 1517 return; 1518 } 1519 } 1520 1521 static void hci_init_done(void){ 1522 // done. tell the app 1523 log_info("hci_init_done -> HCI_STATE_WORKING"); 1524 hci_stack->state = HCI_STATE_WORKING; 1525 hci_emit_state(); 1526 hci_run(); 1527 } 1528 1529 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1530 1531 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1532 1533 uint8_t command_completed = 0; 1534 1535 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1536 uint16_t opcode = little_endian_read_16(packet,3); 1537 if (opcode == hci_stack->last_cmd_opcode){ 1538 command_completed = 1; 1539 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1540 } else { 1541 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1542 } 1543 } 1544 1545 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1546 uint8_t status = packet[2]; 1547 uint16_t opcode = little_endian_read_16(packet,4); 1548 if (opcode == hci_stack->last_cmd_opcode){ 1549 if (status){ 1550 command_completed = 1; 1551 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1552 } else { 1553 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1554 } 1555 } else { 1556 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1557 } 1558 } 1559 1560 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1561 1562 // Vendor == CSR 1563 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1564 // TODO: track actual command 1565 command_completed = 1; 1566 } 1567 1568 // Vendor == Toshiba 1569 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1570 // TODO: track actual command 1571 command_completed = 1; 1572 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1573 hci_stack->num_cmd_packets = 1; 1574 } 1575 1576 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1577 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1578 // 1579 // HCI Reset 1580 // Timeout 100 ms 1581 // HCI Reset 1582 // Command Complete Reset 1583 // HCI Read Local Version Information 1584 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1585 // hang... 1586 // 1587 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1588 if (!command_completed 1589 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1590 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1591 1592 uint16_t opcode = little_endian_read_16(packet,3); 1593 if (opcode == hci_reset.opcode){ 1594 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1595 return; 1596 } 1597 } 1598 1599 // CSR & H5 1600 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1601 if (!command_completed 1602 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1603 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1604 1605 uint16_t opcode = little_endian_read_16(packet,3); 1606 if (opcode == hci_reset.opcode){ 1607 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1608 return; 1609 } 1610 } 1611 1612 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1613 // fix: Correct substate and behave as command below 1614 if (command_completed){ 1615 switch (hci_stack->substate){ 1616 case HCI_INIT_SEND_RESET: 1617 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1618 break; 1619 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1620 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1621 break; 1622 default: 1623 break; 1624 } 1625 } 1626 1627 #endif 1628 1629 if (!command_completed) return; 1630 1631 int need_baud_change = 0; 1632 int need_addr_change = 0; 1633 1634 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1635 need_baud_change = hci_stack->config 1636 && hci_stack->chipset 1637 && hci_stack->chipset->set_baudrate_command 1638 && hci_stack->hci_transport->set_baudrate 1639 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1640 1641 need_addr_change = hci_stack->custom_bd_addr_set 1642 && hci_stack->chipset 1643 && hci_stack->chipset->set_bd_addr_command; 1644 #endif 1645 1646 switch(hci_stack->substate){ 1647 1648 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1649 case HCI_INIT_SEND_RESET: 1650 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1651 // fix: just correct substate and behave as command below 1652 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1653 btstack_run_loop_remove_timer(&hci_stack->timeout); 1654 break; 1655 case HCI_INIT_W4_SEND_RESET: 1656 btstack_run_loop_remove_timer(&hci_stack->timeout); 1657 break; 1658 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1659 log_info("Received local name, need baud change %d", need_baud_change); 1660 if (need_baud_change){ 1661 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1662 return; 1663 } 1664 // skip baud change 1665 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1666 return; 1667 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1668 // for STLC2500D, baud rate change already happened. 1669 // for others, baud rate gets changed now 1670 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1671 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1672 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1673 hci_stack->hci_transport->set_baudrate(baud_rate); 1674 } 1675 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1676 return; 1677 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1678 btstack_run_loop_remove_timer(&hci_stack->timeout); 1679 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1680 return; 1681 case HCI_INIT_W4_CUSTOM_INIT: 1682 // repeat custom init 1683 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1684 return; 1685 #else 1686 case HCI_INIT_W4_SEND_RESET: 1687 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1688 return ; 1689 #endif 1690 1691 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1692 if (need_baud_change && hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT && 1693 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1694 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1695 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1696 return; 1697 } 1698 if (need_addr_change){ 1699 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1700 return; 1701 } 1702 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1703 return; 1704 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1705 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1706 if (need_baud_change){ 1707 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1708 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1709 hci_stack->hci_transport->set_baudrate(baud_rate); 1710 } 1711 if (need_addr_change){ 1712 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1713 return; 1714 } 1715 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1716 return; 1717 case HCI_INIT_W4_SET_BD_ADDR: 1718 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1719 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1720 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1721 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1722 return; 1723 } 1724 // skipping st warm boot 1725 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1726 return; 1727 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1728 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1729 return; 1730 #endif 1731 case HCI_INIT_W4_READ_BD_ADDR: 1732 // only read buffer size if supported 1733 if (hci_stack->local_supported_commands[0] & 0x01) { 1734 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1735 return; 1736 } 1737 // skipping read buffer size 1738 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1739 return; 1740 case HCI_INIT_W4_SET_EVENT_MASK: 1741 // skip Classic init commands for LE only chipsets 1742 if (!hci_classic_supported()){ 1743 #ifdef ENABLE_BLE 1744 if (hci_le_supported()){ 1745 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1746 return; 1747 } 1748 #endif 1749 log_error("Neither BR/EDR nor LE supported"); 1750 hci_init_done(); 1751 return; 1752 } 1753 if (!gap_ssp_supported()){ 1754 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1755 return; 1756 } 1757 break; 1758 #ifdef ENABLE_BLE 1759 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1760 // skip write le host if not supported (e.g. on LE only EM9301) 1761 if (hci_stack->local_supported_commands[0] & 0x02) break; 1762 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1763 return; 1764 1765 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1766 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1767 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1768 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1769 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1770 return; 1771 } 1772 // explicit fall through to reduce repetitions 1773 1774 #ifdef ENABLE_LE_CENTRAL 1775 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1776 #else 1777 hci_init_done(); 1778 #endif 1779 return; 1780 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1781 1782 #endif /* ENABLE_BLE */ 1783 1784 #ifdef ENABLE_SCO_OVER_HCI 1785 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1786 // skip write synchronous flow control if not supported 1787 if (hci_stack->local_supported_commands[0] & 0x04) break; 1788 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1789 // explicit fall through to reduce repetitions 1790 1791 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1792 // skip write default erroneous data reporting if not supported 1793 if (hci_stack->local_supported_commands[0] & 0x08) break; 1794 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1795 // explicit fall through to reduce repetitions 1796 1797 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1798 // skip bcm set sco pcm config on non-Broadcom chipsets 1799 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1800 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1801 // explicit fall through to reduce repetitions 1802 1803 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1804 if (!hci_le_supported()){ 1805 // SKIP LE init for Classic only configuration 1806 hci_init_done(); 1807 return; 1808 } 1809 break; 1810 1811 #else /* !ENABLE_SCO_OVER_HCI */ 1812 1813 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1814 #ifdef ENABLE_BLE 1815 if (hci_le_supported()){ 1816 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1817 return; 1818 } 1819 #endif 1820 // SKIP LE init for Classic only configuration 1821 hci_init_done(); 1822 return; 1823 #endif /* ENABLE_SCO_OVER_HCI */ 1824 1825 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1826 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1827 // Response to command before init done state -> init done 1828 case (HCI_INIT_DONE-1): 1829 hci_init_done(); 1830 return; 1831 #endif 1832 1833 default: 1834 break; 1835 } 1836 hci_initializing_next_state(); 1837 } 1838 1839 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1840 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1841 bd_addr_t bd_address; 1842 memcpy(&bd_address, conn->address, 6); 1843 1844 #ifdef ENABLE_CLASSIC 1845 // cache needed data 1846 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1847 #endif 1848 1849 // connection failed, remove entry 1850 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1851 btstack_memory_hci_connection_free( conn ); 1852 1853 #ifdef ENABLE_CLASSIC 1854 // notify client if dedicated bonding 1855 if (notify_dedicated_bonding_failed){ 1856 log_info("hci notify_dedicated_bonding_failed"); 1857 hci_emit_dedicated_bonding_result(bd_address, status); 1858 } 1859 1860 // if authentication error, also delete link key 1861 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1862 gap_drop_link_key_for_bd_addr(bd_address); 1863 } 1864 #endif 1865 } 1866 1867 static void event_handler(uint8_t *packet, int size){ 1868 1869 uint16_t event_length = packet[1]; 1870 1871 // assert packet is complete 1872 if (size != event_length + 2){ 1873 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1874 return; 1875 } 1876 1877 bd_addr_t addr; 1878 bd_addr_type_t addr_type; 1879 hci_con_handle_t handle; 1880 hci_connection_t * conn; 1881 int i; 1882 int create_connection_cmd; 1883 1884 #ifdef ENABLE_CLASSIC 1885 uint8_t link_type; 1886 #endif 1887 1888 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1889 1890 switch (hci_event_packet_get_type(packet)) { 1891 1892 case HCI_EVENT_COMMAND_COMPLETE: 1893 // get num cmd packets - limit to 1 to reduce complexity 1894 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1895 1896 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1897 if (packet[5]) break; 1898 // terminate, name 248 chars 1899 packet[6+248] = 0; 1900 log_info("local name: %s", &packet[6]); 1901 } 1902 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1903 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1904 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1905 uint16_t acl_len = little_endian_read_16(packet, 6); 1906 uint16_t sco_len = packet[8]; 1907 1908 // determine usable ACL/SCO payload size 1909 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1910 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1911 1912 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1913 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1914 1915 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1916 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1917 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1918 } 1919 } 1920 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_rssi)){ 1921 if (packet[5] == 0){ 1922 uint8_t event[5]; 1923 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 1924 event[1] = 3; 1925 memcpy(&event[2], &packet[6], 3); 1926 hci_emit_event(event, sizeof(event), 1); 1927 } 1928 } 1929 #ifdef ENABLE_BLE 1930 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1931 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1932 hci_stack->le_acl_packets_total_num = packet[8]; 1933 // determine usable ACL payload size 1934 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1935 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1936 } 1937 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1938 } 1939 #endif 1940 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1941 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1942 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1943 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1944 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); 1945 } 1946 #endif 1947 #ifdef ENABLE_LE_CENTRAL 1948 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1949 hci_stack->le_whitelist_capacity = packet[6]; 1950 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1951 } 1952 #endif 1953 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1954 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1955 hci_stack->local_bd_addr); 1956 log_info("Local Address, Status: 0x%02x: Addr: %s", 1957 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1958 #ifdef ENABLE_CLASSIC 1959 if (hci_stack->link_key_db){ 1960 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1961 } 1962 #endif 1963 } 1964 #ifdef ENABLE_CLASSIC 1965 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1966 hci_emit_discoverable_enabled(hci_stack->discoverable); 1967 } 1968 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1969 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1970 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1971 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1972 hci_emit_event(event, sizeof(event), 1); 1973 } 1974 } 1975 #endif 1976 1977 // Note: HCI init checks 1978 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1979 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1980 1981 #ifdef ENABLE_CLASSIC 1982 // determine usable ACL packet types based on host buffer size and supported features 1983 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1984 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1985 #endif 1986 // Classic/LE 1987 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1988 } 1989 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1990 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1991 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1992 uint16_t manufacturer = little_endian_read_16(packet, 10); 1993 // map Cypress to Broadcom 1994 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 1995 log_info("Treat Cypress as Broadcom"); 1996 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 1997 little_endian_store_16(packet, 10, manufacturer); 1998 } 1999 hci_stack->manufacturer = manufacturer; 2000 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 2001 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 2002 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2003 } 2004 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 2005 hci_stack->local_supported_commands[0] = 2006 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2007 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2008 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2009 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2010 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2011 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2 | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2012 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1; // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2013 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 2014 } 2015 #ifdef ENABLE_CLASSIC 2016 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 2017 if (packet[5] == 0){ 2018 hci_stack->synchronous_flow_control_enabled = 1; 2019 } 2020 } 2021 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_encryption_key_size)){ 2022 uint8_t status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2023 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2024 conn = hci_connection_for_handle(handle); 2025 if (!conn) break; 2026 if (status == 0){ 2027 uint8_t key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2028 log_info("Handle %x04x key Size: %u", handle, key_size); 2029 conn->encryption_key_size = key_size; 2030 } else { 2031 log_info("Read Encryption Key Size failed -> assuming insecure connection with key size of 1"); 2032 conn->encryption_key_size = 1; 2033 } 2034 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2035 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2036 } 2037 #endif 2038 break; 2039 2040 case HCI_EVENT_COMMAND_STATUS: 2041 // get num cmd packets - limit to 1 to reduce complexity 2042 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2043 2044 // check command status to detected failed outgoing connections 2045 create_connection_cmd = 0; 2046 #ifdef ENABLE_CLASSIC 2047 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2048 create_connection_cmd = 1; 2049 } 2050 #endif 2051 #ifdef ENABLE_LE_CENTRAL 2052 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2053 create_connection_cmd = 1; 2054 } 2055 #endif 2056 if (create_connection_cmd) { 2057 uint8_t status = hci_event_command_status_get_status(packet); 2058 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2059 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); 2060 2061 // reset outgoing address info 2062 memset(hci_stack->outgoing_addr, 0, 6); 2063 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2064 2065 // error => outgoing connection failed 2066 if ((conn != NULL) && (status != 0)){ 2067 hci_handle_connection_failed(conn, status); 2068 } 2069 } 2070 break; 2071 2072 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2073 int offset = 3; 2074 for (i=0; i<packet[2];i++){ 2075 handle = little_endian_read_16(packet, offset) & 0x0fff; 2076 offset += 2; 2077 uint16_t num_packets = little_endian_read_16(packet, offset); 2078 offset += 2; 2079 2080 conn = hci_connection_for_handle(handle); 2081 if (!conn){ 2082 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2083 continue; 2084 } 2085 2086 if (conn->num_packets_sent >= num_packets){ 2087 conn->num_packets_sent -= num_packets; 2088 } else { 2089 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2090 conn->num_packets_sent = 0; 2091 } 2092 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2093 2094 #ifdef ENABLE_CLASSIC 2095 // For SCO, we do the can_send_now_check here 2096 hci_notify_if_sco_can_send_now(); 2097 #endif 2098 } 2099 break; 2100 } 2101 2102 #ifdef ENABLE_CLASSIC 2103 case HCI_EVENT_INQUIRY_COMPLETE: 2104 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2105 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2106 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2107 hci_emit_event(event, sizeof(event), 1); 2108 } 2109 break; 2110 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2111 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2112 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2113 } 2114 break; 2115 case HCI_EVENT_CONNECTION_REQUEST: 2116 reverse_bd_addr(&packet[2], addr); 2117 if (hci_stack->gap_classic_accept_callback != NULL){ 2118 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2119 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2120 bd_addr_copy(hci_stack->decline_addr, addr); 2121 break; 2122 } 2123 } 2124 2125 // TODO: eval COD 8-10 2126 link_type = packet[11]; 2127 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2128 addr_type = link_type == 1 ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2129 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2130 if (!conn) { 2131 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2132 } 2133 if (!conn) { 2134 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2135 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2136 bd_addr_copy(hci_stack->decline_addr, addr); 2137 break; 2138 } 2139 conn->role = HCI_ROLE_SLAVE; 2140 conn->state = RECEIVED_CONNECTION_REQUEST; 2141 // store info about eSCO 2142 if (link_type == 0x02){ 2143 conn->remote_supported_feature_eSCO = 1; 2144 } 2145 hci_run(); 2146 break; 2147 2148 case HCI_EVENT_CONNECTION_COMPLETE: 2149 // Connection management 2150 reverse_bd_addr(&packet[5], addr); 2151 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2152 addr_type = BD_ADDR_TYPE_ACL; 2153 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2154 if (conn) { 2155 if (!packet[2]){ 2156 conn->state = OPEN; 2157 conn->con_handle = little_endian_read_16(packet, 3); 2158 2159 // queue get remote feature 2160 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2161 2162 // queue set supervision timeout if we're master 2163 if ((hci_stack->link_supervision_timeout != 0) && conn->role == HCI_ROLE_MASTER){ 2164 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2165 } 2166 2167 // restart timer 2168 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2169 btstack_run_loop_add_timer(&conn->timeout); 2170 2171 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2172 2173 hci_emit_nr_connections_changed(); 2174 } else { 2175 // connection failed 2176 hci_handle_connection_failed(conn, packet[2]); 2177 } 2178 } 2179 break; 2180 2181 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2182 reverse_bd_addr(&packet[5], addr); 2183 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2184 if (packet[2]){ 2185 // connection failed 2186 break; 2187 } 2188 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2189 if (!conn) { 2190 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2191 } 2192 if (!conn) { 2193 break; 2194 } 2195 conn->state = OPEN; 2196 conn->con_handle = little_endian_read_16(packet, 3); 2197 2198 #ifdef ENABLE_SCO_OVER_HCI 2199 // update SCO 2200 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2201 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2202 } 2203 // trigger can send now 2204 if (hci_have_usb_transport()){ 2205 hci_stack->sco_can_send_now = 1; 2206 } 2207 #endif 2208 break; 2209 2210 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2211 handle = little_endian_read_16(packet, 3); 2212 conn = hci_connection_for_handle(handle); 2213 if (!conn) break; 2214 if (!packet[2]){ 2215 uint8_t * features = &packet[5]; 2216 if (features[6] & (1 << 3)){ 2217 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2218 } 2219 if (features[3] & (1<<7)){ 2220 conn->remote_supported_feature_eSCO = 1; 2221 } 2222 } 2223 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2224 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2225 if (conn->bonding_flags & BONDING_DEDICATED){ 2226 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2227 } 2228 break; 2229 2230 case HCI_EVENT_LINK_KEY_REQUEST: 2231 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2232 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2233 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2234 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2235 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2236 hci_run(); 2237 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2238 return; 2239 2240 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2241 reverse_bd_addr(&packet[2], addr); 2242 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2243 if (!conn) break; 2244 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2245 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2246 // Change Connection Encryption keeps link key type 2247 if (link_key_type != CHANGED_COMBINATION_KEY){ 2248 conn->link_key_type = link_key_type; 2249 } 2250 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2251 // still forward event to allow dismiss of pairing dialog 2252 break; 2253 } 2254 2255 case HCI_EVENT_PIN_CODE_REQUEST: 2256 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2257 // non-bondable mode: pin code negative reply will be sent 2258 if (!hci_stack->bondable){ 2259 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2260 hci_run(); 2261 return; 2262 } 2263 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2264 if (!hci_stack->link_key_db) break; 2265 hci_event_pin_code_request_get_bd_addr(packet, addr); 2266 hci_stack->link_key_db->delete_link_key(addr); 2267 break; 2268 2269 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2270 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2271 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2272 break; 2273 2274 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2275 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2276 if (!hci_stack->ssp_auto_accept) break; 2277 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2278 break; 2279 2280 case HCI_EVENT_USER_PASSKEY_REQUEST: 2281 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2282 if (!hci_stack->ssp_auto_accept) break; 2283 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2284 break; 2285 case HCI_EVENT_MODE_CHANGE: 2286 handle = hci_event_mode_change_get_handle(packet); 2287 conn = hci_connection_for_handle(handle); 2288 if (!conn) break; 2289 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2290 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2291 break; 2292 #endif 2293 2294 case HCI_EVENT_ENCRYPTION_CHANGE: 2295 handle = little_endian_read_16(packet, 3); 2296 conn = hci_connection_for_handle(handle); 2297 if (!conn) break; 2298 if (packet[2] == 0) { 2299 if (packet[5]){ 2300 if (hci_is_le_connection(conn)){ 2301 // For LE, we accept connection as encrypted 2302 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2303 } 2304 #ifdef ENABLE_CLASSIC 2305 else { 2306 // For Classic, we need to validate encryption key size first 2307 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2308 } 2309 #endif 2310 } else { 2311 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2312 } 2313 } 2314 2315 break; 2316 2317 #ifdef ENABLE_CLASSIC 2318 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2319 handle = little_endian_read_16(packet, 3); 2320 conn = hci_connection_for_handle(handle); 2321 if (!conn) break; 2322 2323 // dedicated bonding: send result and disconnect 2324 if (conn->bonding_flags & BONDING_DEDICATED){ 2325 conn->bonding_flags &= ~BONDING_DEDICATED; 2326 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2327 conn->bonding_status = packet[2]; 2328 break; 2329 } 2330 2331 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2332 // link key sufficient for requested security 2333 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2334 break; 2335 } 2336 // not enough 2337 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2338 break; 2339 #endif 2340 2341 // HCI_EVENT_DISCONNECTION_COMPLETE 2342 // has been split, to first notify stack before shutting connection down 2343 // see end of function, too. 2344 case HCI_EVENT_DISCONNECTION_COMPLETE: 2345 if (packet[2]) break; // status != 0 2346 handle = little_endian_read_16(packet, 3); 2347 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2348 if (hci_stack->acl_fragmentation_total_size > 0) { 2349 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2350 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2351 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2352 hci_stack->acl_fragmentation_total_size = 0; 2353 hci_stack->acl_fragmentation_pos = 0; 2354 if (release_buffer){ 2355 hci_release_packet_buffer(); 2356 } 2357 } 2358 } 2359 2360 // re-enable advertisements for le connections if active 2361 conn = hci_connection_for_handle(handle); 2362 if (!conn) break; 2363 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2364 #ifdef ENABLE_BLE 2365 #ifdef ENABLE_LE_PERIPHERAL 2366 if (hci_is_le_connection(conn)){ 2367 hci_reenable_advertisements_if_needed(); 2368 } 2369 #endif 2370 #endif 2371 break; 2372 2373 case HCI_EVENT_HARDWARE_ERROR: 2374 log_error("Hardware Error: 0x%02x", packet[2]); 2375 if (hci_stack->hardware_error_callback){ 2376 (*hci_stack->hardware_error_callback)(packet[2]); 2377 } else { 2378 // if no special requests, just reboot stack 2379 hci_power_control_off(); 2380 hci_power_control_on(); 2381 } 2382 break; 2383 2384 #ifdef ENABLE_CLASSIC 2385 case HCI_EVENT_ROLE_CHANGE: 2386 if (packet[2]) break; // status != 0 2387 reverse_bd_addr(&packet[3], addr); 2388 addr_type = BD_ADDR_TYPE_ACL; 2389 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2390 if (!conn) break; 2391 conn->role = packet[9]; 2392 break; 2393 #endif 2394 2395 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2396 // release packet buffer only for asynchronous transport and if there are not further fragements 2397 if (hci_transport_synchronous()) { 2398 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2399 return; // instead of break: to avoid re-entering hci_run() 2400 } 2401 hci_stack->acl_fragmentation_tx_active = 0; 2402 if (hci_stack->acl_fragmentation_total_size) break; 2403 hci_release_packet_buffer(); 2404 2405 // L2CAP receives this event via the hci_emit_event below 2406 2407 #ifdef ENABLE_CLASSIC 2408 // For SCO, we do the can_send_now_check here 2409 hci_notify_if_sco_can_send_now(); 2410 #endif 2411 break; 2412 2413 #ifdef ENABLE_CLASSIC 2414 case HCI_EVENT_SCO_CAN_SEND_NOW: 2415 // For SCO, we do the can_send_now_check here 2416 hci_stack->sco_can_send_now = 1; 2417 hci_notify_if_sco_can_send_now(); 2418 return; 2419 2420 // explode inquriy results for easier consumption 2421 case HCI_EVENT_INQUIRY_RESULT: 2422 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2423 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2424 gap_inquiry_explode(packet); 2425 break; 2426 #endif 2427 2428 #ifdef ENABLE_BLE 2429 case HCI_EVENT_LE_META: 2430 switch (packet[2]){ 2431 #ifdef ENABLE_LE_CENTRAL 2432 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2433 // log_info("advertising report received"); 2434 if (!hci_stack->le_scanning_enabled) break; 2435 le_handle_advertisement_report(packet, size); 2436 break; 2437 #endif 2438 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2439 // Connection management 2440 reverse_bd_addr(&packet[8], addr); 2441 addr_type = (bd_addr_type_t)packet[7]; 2442 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2443 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2444 2445 #ifdef ENABLE_LE_CENTRAL 2446 // if auto-connect, remove from whitelist in both roles 2447 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2448 hci_remove_from_whitelist(addr_type, addr); 2449 } 2450 // handle error: error is reported only to the initiator -> outgoing connection 2451 if (packet[3]){ 2452 2453 // handle cancelled outgoing connection 2454 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2455 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2456 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2457 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2458 conn = gap_get_outgoing_connection(); 2459 } 2460 2461 // outgoing connection establishment is done 2462 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2463 // remove entry 2464 if (conn){ 2465 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2466 btstack_memory_hci_connection_free( conn ); 2467 } 2468 break; 2469 } 2470 #endif 2471 // on success, both hosts receive connection complete event 2472 if (packet[6] == HCI_ROLE_MASTER){ 2473 #ifdef ENABLE_LE_CENTRAL 2474 // if we're master, it was an outgoing connection and we're done with it 2475 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2476 #endif 2477 } else { 2478 #ifdef ENABLE_LE_PERIPHERAL 2479 // if we're slave, it was an incoming connection, advertisements have stopped 2480 hci_stack->le_advertisements_active = 0; 2481 #endif 2482 } 2483 // LE connections are auto-accepted, so just create a connection if there isn't one already 2484 if (!conn){ 2485 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2486 } 2487 // no memory, sorry. 2488 if (!conn){ 2489 break; 2490 } 2491 2492 conn->state = OPEN; 2493 conn->role = packet[6]; 2494 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2495 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2496 2497 #ifdef ENABLE_LE_PERIPHERAL 2498 if (packet[6] == HCI_ROLE_SLAVE){ 2499 hci_reenable_advertisements_if_needed(); 2500 } 2501 #endif 2502 2503 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2504 2505 // restart timer 2506 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2507 // btstack_run_loop_add_timer(&conn->timeout); 2508 2509 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2510 2511 hci_emit_nr_connections_changed(); 2512 break; 2513 2514 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2515 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2516 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2517 conn = hci_connection_for_handle(handle); 2518 if (!conn) break; 2519 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2520 break; 2521 2522 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2523 // connection 2524 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2525 conn = hci_connection_for_handle(handle); 2526 if (conn) { 2527 // read arguments 2528 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2529 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2530 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2531 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2532 2533 // validate against current connection parameter range 2534 le_connection_parameter_range_t existing_range; 2535 gap_get_connection_parameter_range(&existing_range); 2536 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2537 if (update_parameter){ 2538 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2539 conn->le_conn_interval_min = le_conn_interval_min; 2540 conn->le_conn_interval_max = le_conn_interval_max; 2541 conn->le_conn_latency = le_conn_latency; 2542 conn->le_supervision_timeout = le_supervision_timeout; 2543 } else { 2544 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2545 } 2546 } 2547 break; 2548 default: 2549 break; 2550 } 2551 break; 2552 #endif 2553 case HCI_EVENT_VENDOR_SPECIFIC: 2554 // Vendor specific commands often create vendor specific event instead of num completed packets 2555 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2556 switch (hci_stack->manufacturer){ 2557 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2558 hci_stack->num_cmd_packets = 1; 2559 break; 2560 default: 2561 break; 2562 } 2563 break; 2564 default: 2565 break; 2566 } 2567 2568 // handle BT initialization 2569 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2570 hci_initializing_event_handler(packet, size); 2571 } 2572 2573 // help with BT sleep 2574 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2575 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2576 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2577 hci_initializing_next_state(); 2578 } 2579 2580 // notify upper stack 2581 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2582 2583 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2584 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2585 if (!packet[2]){ 2586 handle = little_endian_read_16(packet, 3); 2587 hci_connection_t * aConn = hci_connection_for_handle(handle); 2588 if (aConn) { 2589 uint8_t status = aConn->bonding_status; 2590 uint16_t flags = aConn->bonding_flags; 2591 bd_addr_t bd_address; 2592 memcpy(&bd_address, aConn->address, 6); 2593 hci_shutdown_connection(aConn); 2594 // connection struct is gone, don't access anymore 2595 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2596 hci_emit_dedicated_bonding_result(bd_address, status); 2597 } 2598 } 2599 } 2600 } 2601 2602 // execute main loop 2603 hci_run(); 2604 } 2605 2606 #ifdef ENABLE_CLASSIC 2607 2608 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2609 static void sco_schedule_tx(hci_connection_t * conn); 2610 2611 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2612 log_debug("SCO TX Timeout"); 2613 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2614 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2615 if (!conn) return; 2616 2617 // trigger send 2618 conn->sco_tx_ready = 1; 2619 // extra packet if CVSD but SCO buffer is too short 2620 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && hci_stack->sco_data_packet_length < 123){ 2621 conn->sco_tx_ready++; 2622 } 2623 hci_notify_if_sco_can_send_now(); 2624 } 2625 2626 2627 #define SCO_TX_AFTER_RX_MS (6) 2628 2629 static void sco_schedule_tx(hci_connection_t * conn){ 2630 2631 uint32_t now = btstack_run_loop_get_time_ms(); 2632 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2633 int time_delta_ms = sco_tx_ms - now; 2634 2635 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2636 2637 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2638 btstack_run_loop_set_timer(timer, time_delta_ms); 2639 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2640 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2641 btstack_run_loop_add_timer(timer); 2642 } 2643 2644 static void sco_handler(uint8_t * packet, uint16_t size){ 2645 // lookup connection struct 2646 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2647 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2648 if (!conn) return; 2649 2650 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2651 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2652 if (size == 83 && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2653 packet[2] = 0x3c; 2654 memmove(&packet[3], &packet[23], 63); 2655 size = 63; 2656 } 2657 } 2658 2659 if (hci_have_usb_transport()){ 2660 // Nothing to do 2661 } else { 2662 // 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); 2663 if (hci_stack->synchronous_flow_control_enabled == 0){ 2664 uint32_t now = btstack_run_loop_get_time_ms(); 2665 2666 if (!conn->sco_rx_valid){ 2667 // ignore first 10 packets 2668 conn->sco_rx_count++; 2669 // log_debug("sco rx count %u", conn->sco_rx_count); 2670 if (conn->sco_rx_count == 10) { 2671 // use first timestamp as is and pretent it just started 2672 conn->sco_rx_ms = now; 2673 conn->sco_rx_valid = 1; 2674 conn->sco_rx_count = 0; 2675 sco_schedule_tx(conn); 2676 } 2677 } else { 2678 // track expected arrival timme 2679 conn->sco_rx_count++; 2680 conn->sco_rx_ms += 7; 2681 int delta = (int32_t) (now - conn->sco_rx_ms); 2682 if (delta > 0){ 2683 conn->sco_rx_ms++; 2684 } 2685 // log_debug("sco rx %u", conn->sco_rx_ms); 2686 sco_schedule_tx(conn); 2687 } 2688 } 2689 } 2690 // deliver to app 2691 if (hci_stack->sco_packet_handler) { 2692 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2693 } 2694 2695 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2696 conn->num_packets_completed++; 2697 hci_stack->host_completed_packets = 1; 2698 hci_run(); 2699 #endif 2700 } 2701 #endif 2702 2703 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2704 hci_dump_packet(packet_type, 1, packet, size); 2705 switch (packet_type) { 2706 case HCI_EVENT_PACKET: 2707 event_handler(packet, size); 2708 break; 2709 case HCI_ACL_DATA_PACKET: 2710 acl_handler(packet, size); 2711 break; 2712 #ifdef ENABLE_CLASSIC 2713 case HCI_SCO_DATA_PACKET: 2714 sco_handler(packet, size); 2715 break; 2716 #endif 2717 default: 2718 break; 2719 } 2720 } 2721 2722 /** 2723 * @brief Add event packet handler. 2724 */ 2725 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2726 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2727 } 2728 2729 2730 /** Register HCI packet handlers */ 2731 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2732 hci_stack->acl_packet_handler = handler; 2733 } 2734 2735 #ifdef ENABLE_CLASSIC 2736 /** 2737 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2738 */ 2739 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2740 hci_stack->sco_packet_handler = handler; 2741 } 2742 #endif 2743 2744 static void hci_state_reset(void){ 2745 // no connections yet 2746 hci_stack->connections = NULL; 2747 2748 // keep discoverable/connectable as this has been requested by the client(s) 2749 // hci_stack->discoverable = 0; 2750 // hci_stack->connectable = 0; 2751 // hci_stack->bondable = 1; 2752 // hci_stack->own_addr_type = 0; 2753 2754 // buffer is free 2755 hci_stack->hci_packet_buffer_reserved = 0; 2756 2757 // no pending cmds 2758 hci_stack->decline_reason = 0; 2759 hci_stack->new_scan_enable_value = 0xff; 2760 2761 // LE 2762 #ifdef ENABLE_BLE 2763 memset(hci_stack->le_random_address, 0, 6); 2764 hci_stack->le_random_address_set = 0; 2765 #endif 2766 #ifdef ENABLE_LE_CENTRAL 2767 hci_stack->le_scanning_active = 0; 2768 hci_stack->le_scan_type = 0xff; 2769 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2770 hci_stack->le_whitelist = 0; 2771 hci_stack->le_whitelist_capacity = 0; 2772 #endif 2773 } 2774 2775 #ifdef ENABLE_CLASSIC 2776 /** 2777 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2778 */ 2779 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2780 // store and open remote device db 2781 hci_stack->link_key_db = link_key_db; 2782 if (hci_stack->link_key_db) { 2783 hci_stack->link_key_db->open(); 2784 } 2785 } 2786 #endif 2787 2788 void hci_init(const hci_transport_t *transport, const void *config){ 2789 2790 #ifdef HAVE_MALLOC 2791 if (!hci_stack) { 2792 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2793 } 2794 #else 2795 hci_stack = &hci_stack_static; 2796 #endif 2797 memset(hci_stack, 0, sizeof(hci_stack_t)); 2798 2799 // reference to use transport layer implementation 2800 hci_stack->hci_transport = transport; 2801 2802 // reference to used config 2803 hci_stack->config = config; 2804 2805 // setup pointer for outgoing packet buffer 2806 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2807 2808 // max acl payload size defined in config.h 2809 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2810 2811 // register packet handlers with transport 2812 transport->register_packet_handler(&packet_handler); 2813 2814 hci_stack->state = HCI_STATE_OFF; 2815 2816 // class of device 2817 hci_stack->class_of_device = 0x007a020c; // Smartphone 2818 2819 // bondable by default 2820 hci_stack->bondable = 1; 2821 2822 #ifdef ENABLE_CLASSIC 2823 // classic name 2824 hci_stack->local_name = default_classic_name; 2825 2826 // Master slave policy 2827 hci_stack->master_slave_policy = 1; 2828 2829 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3, we use 16 as default 2830 hci_stack->gap_required_encyrption_key_size = 16; 2831 #endif 2832 2833 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2834 hci_stack->ssp_enable = 1; 2835 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2836 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2837 hci_stack->ssp_auto_accept = 1; 2838 2839 // voice setting - signed 16 bit pcm data with CVSD over the air 2840 hci_stack->sco_voice_setting = 0x60; 2841 2842 #ifdef ENABLE_LE_CENTRAL 2843 // connection parameter to use for outgoing connections 2844 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2845 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2846 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2847 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2848 hci_stack->le_connection_latency = 4; // 4 2849 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2850 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2851 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2852 2853 // default LE Scanning 2854 hci_stack->le_scan_interval = 0x1e0; 2855 hci_stack->le_scan_window = 0x30; 2856 #endif 2857 2858 #ifdef ENABLE_LE_PERIPHERAL 2859 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2860 #endif 2861 2862 // connection parameter range used to answer connection parameter update requests in l2cap 2863 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2864 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2865 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2866 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2867 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2868 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2869 2870 hci_state_reset(); 2871 } 2872 2873 /** 2874 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2875 */ 2876 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2877 hci_stack->chipset = chipset_driver; 2878 2879 // reset chipset driver - init is also called on power_up 2880 if (hci_stack->chipset && hci_stack->chipset->init){ 2881 hci_stack->chipset->init(hci_stack->config); 2882 } 2883 } 2884 2885 /** 2886 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2887 */ 2888 void hci_set_control(const btstack_control_t *hardware_control){ 2889 // references to used control implementation 2890 hci_stack->control = hardware_control; 2891 // init with transport config 2892 hardware_control->init(hci_stack->config); 2893 } 2894 2895 void hci_close(void){ 2896 // close remote device db 2897 if (hci_stack->link_key_db) { 2898 hci_stack->link_key_db->close(); 2899 } 2900 2901 btstack_linked_list_iterator_t lit; 2902 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2903 while (btstack_linked_list_iterator_has_next(&lit)){ 2904 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2905 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2906 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2907 hci_shutdown_connection(connection); 2908 } 2909 2910 hci_power_control(HCI_POWER_OFF); 2911 2912 #ifdef HAVE_MALLOC 2913 free(hci_stack); 2914 #endif 2915 hci_stack = NULL; 2916 } 2917 2918 #ifdef ENABLE_CLASSIC 2919 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 2920 // validate ranage and set 2921 if (encryption_key_size < 7) return; 2922 if (encryption_key_size > 16) return; 2923 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 2924 } 2925 #endif 2926 2927 #ifdef ENABLE_CLASSIC 2928 void gap_set_class_of_device(uint32_t class_of_device){ 2929 hci_stack->class_of_device = class_of_device; 2930 } 2931 2932 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 2933 hci_stack->default_link_policy_settings = default_link_policy_settings; 2934 } 2935 2936 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 2937 hci_stack->link_supervision_timeout = link_supervision_timeout; 2938 } 2939 2940 void hci_disable_l2cap_timeout_check(void){ 2941 disable_l2cap_timeouts = 1; 2942 } 2943 #endif 2944 2945 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2946 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2947 void hci_set_bd_addr(bd_addr_t addr){ 2948 memcpy(hci_stack->custom_bd_addr, addr, 6); 2949 hci_stack->custom_bd_addr_set = 1; 2950 } 2951 #endif 2952 2953 // State-Module-Driver overview 2954 // state module low-level 2955 // HCI_STATE_OFF off close 2956 // HCI_STATE_INITIALIZING, on open 2957 // HCI_STATE_WORKING, on open 2958 // HCI_STATE_HALTING, on open 2959 // HCI_STATE_SLEEPING, off/sleep close 2960 // HCI_STATE_FALLING_ASLEEP on open 2961 2962 static int hci_power_control_on(void){ 2963 2964 // power on 2965 int err = 0; 2966 if (hci_stack->control && hci_stack->control->on){ 2967 err = (*hci_stack->control->on)(); 2968 } 2969 if (err){ 2970 log_error( "POWER_ON failed"); 2971 hci_emit_hci_open_failed(); 2972 return err; 2973 } 2974 2975 // int chipset driver 2976 if (hci_stack->chipset && hci_stack->chipset->init){ 2977 hci_stack->chipset->init(hci_stack->config); 2978 } 2979 2980 // init transport 2981 if (hci_stack->hci_transport->init){ 2982 hci_stack->hci_transport->init(hci_stack->config); 2983 } 2984 2985 // open transport 2986 err = hci_stack->hci_transport->open(); 2987 if (err){ 2988 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2989 if (hci_stack->control && hci_stack->control->off){ 2990 (*hci_stack->control->off)(); 2991 } 2992 hci_emit_hci_open_failed(); 2993 return err; 2994 } 2995 return 0; 2996 } 2997 2998 static void hci_power_control_off(void){ 2999 3000 log_info("hci_power_control_off"); 3001 3002 // close low-level device 3003 hci_stack->hci_transport->close(); 3004 3005 log_info("hci_power_control_off - hci_transport closed"); 3006 3007 // power off 3008 if (hci_stack->control && hci_stack->control->off){ 3009 (*hci_stack->control->off)(); 3010 } 3011 3012 log_info("hci_power_control_off - control closed"); 3013 3014 hci_stack->state = HCI_STATE_OFF; 3015 } 3016 3017 static void hci_power_control_sleep(void){ 3018 3019 log_info("hci_power_control_sleep"); 3020 3021 #if 0 3022 // don't close serial port during sleep 3023 3024 // close low-level device 3025 hci_stack->hci_transport->close(hci_stack->config); 3026 #endif 3027 3028 // sleep mode 3029 if (hci_stack->control && hci_stack->control->sleep){ 3030 (*hci_stack->control->sleep)(); 3031 } 3032 3033 hci_stack->state = HCI_STATE_SLEEPING; 3034 } 3035 3036 static int hci_power_control_wake(void){ 3037 3038 log_info("hci_power_control_wake"); 3039 3040 // wake on 3041 if (hci_stack->control && hci_stack->control->wake){ 3042 (*hci_stack->control->wake)(); 3043 } 3044 3045 #if 0 3046 // open low-level device 3047 int err = hci_stack->hci_transport->open(hci_stack->config); 3048 if (err){ 3049 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3050 if (hci_stack->control && hci_stack->control->off){ 3051 (*hci_stack->control->off)(); 3052 } 3053 hci_emit_hci_open_failed(); 3054 return err; 3055 } 3056 #endif 3057 3058 return 0; 3059 } 3060 3061 static void hci_power_transition_to_initializing(void){ 3062 // set up state machine 3063 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3064 hci_stack->hci_packet_buffer_reserved = 0; 3065 hci_stack->state = HCI_STATE_INITIALIZING; 3066 hci_stack->substate = HCI_INIT_SEND_RESET; 3067 } 3068 3069 int hci_power_control(HCI_POWER_MODE power_mode){ 3070 3071 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3072 3073 int err = 0; 3074 switch (hci_stack->state){ 3075 3076 case HCI_STATE_OFF: 3077 switch (power_mode){ 3078 case HCI_POWER_ON: 3079 err = hci_power_control_on(); 3080 if (err) { 3081 log_error("hci_power_control_on() error %d", err); 3082 return err; 3083 } 3084 hci_power_transition_to_initializing(); 3085 break; 3086 case HCI_POWER_OFF: 3087 // do nothing 3088 break; 3089 case HCI_POWER_SLEEP: 3090 // do nothing (with SLEEP == OFF) 3091 break; 3092 } 3093 break; 3094 3095 case HCI_STATE_INITIALIZING: 3096 switch (power_mode){ 3097 case HCI_POWER_ON: 3098 // do nothing 3099 break; 3100 case HCI_POWER_OFF: 3101 // no connections yet, just turn it off 3102 hci_power_control_off(); 3103 break; 3104 case HCI_POWER_SLEEP: 3105 // no connections yet, just turn it off 3106 hci_power_control_sleep(); 3107 break; 3108 } 3109 break; 3110 3111 case HCI_STATE_WORKING: 3112 switch (power_mode){ 3113 case HCI_POWER_ON: 3114 // do nothing 3115 break; 3116 case HCI_POWER_OFF: 3117 // see hci_run 3118 hci_stack->state = HCI_STATE_HALTING; 3119 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3120 break; 3121 case HCI_POWER_SLEEP: 3122 // see hci_run 3123 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3124 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3125 break; 3126 } 3127 break; 3128 3129 case HCI_STATE_HALTING: 3130 switch (power_mode){ 3131 case HCI_POWER_ON: 3132 hci_power_transition_to_initializing(); 3133 break; 3134 case HCI_POWER_OFF: 3135 // do nothing 3136 break; 3137 case HCI_POWER_SLEEP: 3138 // see hci_run 3139 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3140 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3141 break; 3142 } 3143 break; 3144 3145 case HCI_STATE_FALLING_ASLEEP: 3146 switch (power_mode){ 3147 case HCI_POWER_ON: 3148 3149 #ifdef HAVE_PLATFORM_IPHONE_OS 3150 // nothing to do, if H4 supports power management 3151 if (btstack_control_iphone_power_management_enabled()){ 3152 hci_stack->state = HCI_STATE_INITIALIZING; 3153 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3154 break; 3155 } 3156 #endif 3157 hci_power_transition_to_initializing(); 3158 break; 3159 case HCI_POWER_OFF: 3160 // see hci_run 3161 hci_stack->state = HCI_STATE_HALTING; 3162 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3163 break; 3164 case HCI_POWER_SLEEP: 3165 // do nothing 3166 break; 3167 } 3168 break; 3169 3170 case HCI_STATE_SLEEPING: 3171 switch (power_mode){ 3172 case HCI_POWER_ON: 3173 3174 #ifdef HAVE_PLATFORM_IPHONE_OS 3175 // nothing to do, if H4 supports power management 3176 if (btstack_control_iphone_power_management_enabled()){ 3177 hci_stack->state = HCI_STATE_INITIALIZING; 3178 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3179 hci_update_scan_enable(); 3180 break; 3181 } 3182 #endif 3183 err = hci_power_control_wake(); 3184 if (err) return err; 3185 hci_power_transition_to_initializing(); 3186 break; 3187 case HCI_POWER_OFF: 3188 hci_stack->state = HCI_STATE_HALTING; 3189 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3190 break; 3191 case HCI_POWER_SLEEP: 3192 // do nothing 3193 break; 3194 } 3195 break; 3196 } 3197 3198 // create internal event 3199 hci_emit_state(); 3200 3201 // trigger next/first action 3202 hci_run(); 3203 3204 return 0; 3205 } 3206 3207 3208 #ifdef ENABLE_CLASSIC 3209 3210 static void hci_update_scan_enable(void){ 3211 // 2 = page scan, 1 = inq scan 3212 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 3213 hci_run(); 3214 } 3215 3216 void gap_discoverable_control(uint8_t enable){ 3217 if (enable) enable = 1; // normalize argument 3218 3219 if (hci_stack->discoverable == enable){ 3220 hci_emit_discoverable_enabled(hci_stack->discoverable); 3221 return; 3222 } 3223 3224 hci_stack->discoverable = enable; 3225 hci_update_scan_enable(); 3226 } 3227 3228 void gap_connectable_control(uint8_t enable){ 3229 if (enable) enable = 1; // normalize argument 3230 3231 // don't emit event 3232 if (hci_stack->connectable == enable) return; 3233 3234 hci_stack->connectable = enable; 3235 hci_update_scan_enable(); 3236 } 3237 #endif 3238 3239 void gap_local_bd_addr(bd_addr_t address_buffer){ 3240 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3241 } 3242 3243 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3244 static void hci_host_num_completed_packets(void){ 3245 3246 // create packet manually as arrays are not supported and num_commands should not get reduced 3247 hci_reserve_packet_buffer(); 3248 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3249 3250 uint16_t size = 0; 3251 uint16_t num_handles = 0; 3252 packet[size++] = 0x35; 3253 packet[size++] = 0x0c; 3254 size++; // skip param len 3255 size++; // skip num handles 3256 3257 // add { handle, packets } entries 3258 btstack_linked_item_t * it; 3259 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3260 hci_connection_t * connection = (hci_connection_t *) it; 3261 if (connection->num_packets_completed){ 3262 little_endian_store_16(packet, size, connection->con_handle); 3263 size += 2; 3264 little_endian_store_16(packet, size, connection->num_packets_completed); 3265 size += 2; 3266 // 3267 num_handles++; 3268 connection->num_packets_completed = 0; 3269 } 3270 } 3271 3272 packet[2] = size - 3; 3273 packet[3] = num_handles; 3274 3275 hci_stack->host_completed_packets = 0; 3276 3277 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3278 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3279 3280 // release packet buffer for synchronous transport implementations 3281 if (hci_transport_synchronous()){ 3282 hci_release_packet_buffer(); 3283 hci_emit_transport_packet_sent(); 3284 } 3285 } 3286 #endif 3287 3288 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3289 UNUSED(ds); 3290 hci_stack->substate = HCI_HALTING_CLOSE; 3291 // allow packet handlers to defer final shutdown 3292 hci_emit_state(); 3293 hci_run(); 3294 } 3295 3296 static void hci_run(void){ 3297 3298 // log_info("hci_run: entered"); 3299 btstack_linked_item_t * it; 3300 3301 // send continuation fragments first, as they block the prepared packet buffer 3302 if (hci_stack->acl_fragmentation_total_size > 0) { 3303 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3304 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3305 if (connection) { 3306 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3307 hci_send_acl_packet_fragments(connection); 3308 return; 3309 } 3310 } else { 3311 // connection gone -> discard further fragments 3312 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3313 hci_stack->acl_fragmentation_total_size = 0; 3314 hci_stack->acl_fragmentation_pos = 0; 3315 } 3316 } 3317 3318 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3319 // send host num completed packets next as they don't require num_cmd_packets > 0 3320 if (!hci_can_send_comand_packet_transport()) return; 3321 if (hci_stack->host_completed_packets){ 3322 hci_host_num_completed_packets(); 3323 return; 3324 } 3325 #endif 3326 3327 if (!hci_can_send_command_packet_now()) return; 3328 3329 // global/non-connection oriented commands 3330 3331 #ifdef ENABLE_CLASSIC 3332 // decline incoming connections 3333 if (hci_stack->decline_reason){ 3334 uint8_t reason = hci_stack->decline_reason; 3335 hci_stack->decline_reason = 0; 3336 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3337 return; 3338 } 3339 // send scan enable 3340 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 3341 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3342 hci_stack->new_scan_enable_value = 0xff; 3343 return; 3344 } 3345 // start/stop inquiry 3346 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 3347 uint8_t duration = hci_stack->inquiry_state; 3348 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3349 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3350 return; 3351 } 3352 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3353 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3354 hci_send_cmd(&hci_inquiry_cancel); 3355 return; 3356 } 3357 // remote name request 3358 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3359 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3360 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3361 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3362 return; 3363 } 3364 // pairing 3365 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3366 uint8_t state = hci_stack->gap_pairing_state; 3367 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3368 switch (state){ 3369 case GAP_PAIRING_STATE_SEND_PIN: 3370 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); 3371 break; 3372 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3373 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3374 break; 3375 case GAP_PAIRING_STATE_SEND_PASSKEY: 3376 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3377 break; 3378 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3379 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3380 break; 3381 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3382 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3383 break; 3384 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3385 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3386 break; 3387 default: 3388 break; 3389 } 3390 return; 3391 } 3392 #endif 3393 3394 #ifdef ENABLE_BLE 3395 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 3396 if ((hci_stack->state == HCI_STATE_WORKING) 3397 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 3398 3399 #ifdef ENABLE_LE_CENTRAL 3400 // handle le scan 3401 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3402 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3403 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3404 return; 3405 } 3406 if (hci_stack->le_scan_type != 0xff){ 3407 // defaults: active scanning, accept all advertisement packets 3408 int scan_type = hci_stack->le_scan_type; 3409 hci_stack->le_scan_type = 0xff; 3410 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); 3411 return; 3412 } 3413 #endif 3414 #ifdef ENABLE_LE_PERIPHERAL 3415 // le advertisement control 3416 if (hci_stack->le_advertisements_todo){ 3417 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3418 } 3419 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3420 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3421 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3422 return; 3423 } 3424 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3425 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3426 hci_send_cmd(&hci_le_set_advertising_parameters, 3427 hci_stack->le_advertisements_interval_min, 3428 hci_stack->le_advertisements_interval_max, 3429 hci_stack->le_advertisements_type, 3430 hci_stack->le_own_addr_type, 3431 hci_stack->le_advertisements_direct_address_type, 3432 hci_stack->le_advertisements_direct_address, 3433 hci_stack->le_advertisements_channel_map, 3434 hci_stack->le_advertisements_filter_policy); 3435 return; 3436 } 3437 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3438 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3439 uint8_t adv_data_clean[31]; 3440 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3441 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3442 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3443 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3444 return; 3445 } 3446 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3447 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3448 uint8_t scan_data_clean[31]; 3449 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3450 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3451 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3452 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3453 return; 3454 } 3455 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3456 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3457 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3458 return; 3459 } 3460 #endif 3461 3462 #ifdef ENABLE_LE_CENTRAL 3463 // 3464 // LE Whitelist Management 3465 // 3466 3467 // check if whitelist needs modification 3468 btstack_linked_list_iterator_t lit; 3469 int modification_pending = 0; 3470 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3471 while (btstack_linked_list_iterator_has_next(&lit)){ 3472 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3473 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3474 modification_pending = 1; 3475 break; 3476 } 3477 } 3478 3479 if (modification_pending){ 3480 // stop connnecting if modification pending 3481 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3482 hci_send_cmd(&hci_le_create_connection_cancel); 3483 return; 3484 } 3485 3486 // add/remove entries 3487 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3488 while (btstack_linked_list_iterator_has_next(&lit)){ 3489 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3490 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3491 entry->state = LE_WHITELIST_ON_CONTROLLER; 3492 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3493 return; 3494 3495 } 3496 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3497 bd_addr_t address; 3498 bd_addr_type_t address_type = entry->address_type; 3499 memcpy(address, entry->address, 6); 3500 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3501 btstack_memory_whitelist_entry_free(entry); 3502 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3503 return; 3504 } 3505 } 3506 } 3507 3508 // start connecting 3509 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3510 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3511 bd_addr_t null_addr; 3512 memset(null_addr, 0, 6); 3513 hci_send_cmd(&hci_le_create_connection, 3514 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3515 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3516 1, // use whitelist 3517 0, // peer address type 3518 null_addr, // peer bd addr 3519 hci_stack->le_own_addr_type, // our addr type: 3520 hci_stack->le_connection_interval_min, // conn interval min 3521 hci_stack->le_connection_interval_max, // conn interval max 3522 hci_stack->le_connection_latency, // conn latency 3523 hci_stack->le_supervision_timeout, // conn latency 3524 hci_stack->le_minimum_ce_length, // min ce length 3525 hci_stack->le_maximum_ce_length // max ce length 3526 ); 3527 return; 3528 } 3529 #endif 3530 } 3531 #endif 3532 3533 // send pending HCI commands 3534 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3535 hci_connection_t * connection = (hci_connection_t *) it; 3536 3537 switch(connection->state){ 3538 case SEND_CREATE_CONNECTION: 3539 switch(connection->address_type){ 3540 #ifdef ENABLE_CLASSIC 3541 case BD_ADDR_TYPE_ACL: 3542 log_info("sending hci_create_connection"); 3543 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3544 break; 3545 #endif 3546 default: 3547 #ifdef ENABLE_BLE 3548 #ifdef ENABLE_LE_CENTRAL 3549 // track outgoing connection 3550 hci_stack->outgoing_addr_type = connection->address_type; 3551 memcpy(hci_stack->outgoing_addr, connection->address, 6); 3552 log_info("sending hci_le_create_connection"); 3553 hci_send_cmd(&hci_le_create_connection, 3554 hci_stack->le_connection_scan_interval, // conn scan interval 3555 hci_stack->le_connection_scan_window, // conn scan windows 3556 0, // don't use whitelist 3557 connection->address_type, // peer address type 3558 connection->address, // peer bd addr 3559 hci_stack->le_own_addr_type, // our addr type: 3560 hci_stack->le_connection_interval_min, // conn interval min 3561 hci_stack->le_connection_interval_max, // conn interval max 3562 hci_stack->le_connection_latency, // conn latency 3563 hci_stack->le_supervision_timeout, // conn latency 3564 hci_stack->le_minimum_ce_length, // min ce length 3565 hci_stack->le_maximum_ce_length // max ce length 3566 ); 3567 connection->state = SENT_CREATE_CONNECTION; 3568 #endif 3569 #endif 3570 break; 3571 } 3572 return; 3573 3574 #ifdef ENABLE_CLASSIC 3575 case RECEIVED_CONNECTION_REQUEST: 3576 connection->role = HCI_ROLE_SLAVE; 3577 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3578 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3579 connection->state = ACCEPTED_CONNECTION_REQUEST; 3580 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3581 } 3582 return; 3583 #endif 3584 3585 #ifdef ENABLE_BLE 3586 #ifdef ENABLE_LE_CENTRAL 3587 case SEND_CANCEL_CONNECTION: 3588 connection->state = SENT_CANCEL_CONNECTION; 3589 hci_send_cmd(&hci_le_create_connection_cancel); 3590 return; 3591 #endif 3592 #endif 3593 case SEND_DISCONNECT: 3594 connection->state = SENT_DISCONNECT; 3595 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3596 return; 3597 3598 default: 3599 break; 3600 } 3601 3602 // no further commands if connection is about to get shut down 3603 if (connection->state == SENT_DISCONNECT) continue; 3604 3605 if (connection->authentication_flags & READ_RSSI){ 3606 connectionClearAuthenticationFlags(connection, READ_RSSI); 3607 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3608 return; 3609 } 3610 3611 #ifdef ENABLE_CLASSIC 3612 3613 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 3614 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 3615 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 3616 return; 3617 } 3618 3619 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3620 log_info("responding to link key request"); 3621 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3622 link_key_t link_key; 3623 link_key_type_t link_key_type; 3624 if ( hci_stack->link_key_db 3625 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3626 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3627 connection->link_key_type = link_key_type; 3628 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3629 } else { 3630 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3631 } 3632 return; 3633 } 3634 3635 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3636 log_info("denying to pin request"); 3637 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3638 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3639 return; 3640 } 3641 3642 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3643 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3644 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3645 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3646 // tweak authentication requirements 3647 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3648 if (connection->bonding_flags & BONDING_DEDICATED){ 3649 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3650 } 3651 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3652 authreq |= 1; 3653 } 3654 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3655 } else { 3656 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3657 } 3658 return; 3659 } 3660 3661 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3662 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3663 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3664 return; 3665 } 3666 3667 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3668 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3669 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3670 return; 3671 } 3672 3673 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3674 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3675 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3676 return; 3677 } 3678 3679 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3680 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3681 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3682 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3683 return; 3684 } 3685 3686 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3687 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3688 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3689 return; 3690 } 3691 3692 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3693 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3694 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3695 return; 3696 } 3697 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3698 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3699 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3700 return; 3701 } 3702 #endif 3703 3704 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3705 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3706 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3707 return; 3708 } 3709 3710 #ifdef ENABLE_CLASSIC 3711 uint16_t sniff_min_interval; 3712 switch (connection->sniff_min_interval){ 3713 case 0: 3714 break; 3715 case 0xffff: 3716 connection->sniff_min_interval = 0; 3717 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3718 return; 3719 default: 3720 sniff_min_interval = connection->sniff_min_interval; 3721 connection->sniff_min_interval = 0; 3722 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3723 return; 3724 } 3725 #endif 3726 3727 #ifdef ENABLE_BLE 3728 switch (connection->le_con_parameter_update_state){ 3729 // response to L2CAP CON PARAMETER UPDATE REQUEST 3730 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3731 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3732 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3733 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3734 0x0000, 0xffff); 3735 return; 3736 case CON_PARAMETER_UPDATE_REPLY: 3737 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3738 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3739 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3740 0x0000, 0xffff); 3741 return; 3742 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3743 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3744 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3745 return; 3746 default: 3747 break; 3748 } 3749 if (connection->le_phy_update_all_phys != 0xff){ 3750 uint8_t all_phys = connection->le_phy_update_all_phys; 3751 connection->le_phy_update_all_phys = 0xff; 3752 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); 3753 return; 3754 } 3755 #endif 3756 } 3757 3758 hci_connection_t * connection; 3759 switch (hci_stack->state){ 3760 case HCI_STATE_INITIALIZING: 3761 hci_initializing_run(); 3762 break; 3763 3764 case HCI_STATE_HALTING: 3765 3766 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 3767 switch (hci_stack->substate){ 3768 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 3769 case HCI_HALTING_DISCONNECT_ALL_TIMER: 3770 3771 #ifdef ENABLE_BLE 3772 #ifdef ENABLE_LE_CENTRAL 3773 // free whitelist entries 3774 { 3775 btstack_linked_list_iterator_t lit; 3776 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3777 while (btstack_linked_list_iterator_has_next(&lit)){ 3778 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3779 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3780 btstack_memory_whitelist_entry_free(entry); 3781 } 3782 } 3783 #endif 3784 #endif 3785 // close all open connections 3786 connection = (hci_connection_t *) hci_stack->connections; 3787 if (connection){ 3788 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3789 if (!hci_can_send_command_packet_now()) return; 3790 3791 // check state 3792 if (connection->state == SENT_DISCONNECT) return; 3793 connection->state = SENT_DISCONNECT; 3794 3795 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3796 3797 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3798 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3799 3800 // ... which would be ignored anyway as we shutdown (free) the connection now 3801 hci_shutdown_connection(connection); 3802 3803 // finally, send the disconnect command 3804 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3805 return; 3806 } 3807 3808 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 3809 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 3810 log_info("HCI_STATE_HALTING: wait 50 ms"); 3811 hci_stack->substate = HCI_HALTING_W4_TIMER; 3812 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 3813 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3814 btstack_run_loop_add_timer(&hci_stack->timeout); 3815 break; 3816 } 3817 3818 /* explicit fall-through */ 3819 3820 case HCI_HALTING_CLOSE: 3821 log_info("HCI_STATE_HALTING, calling off"); 3822 3823 // switch mode 3824 hci_power_control_off(); 3825 3826 log_info("HCI_STATE_HALTING, emitting state"); 3827 hci_emit_state(); 3828 log_info("HCI_STATE_HALTING, done"); 3829 break; 3830 3831 case HCI_HALTING_W4_TIMER: 3832 // keep waiting 3833 3834 break; 3835 default: 3836 break; 3837 } 3838 3839 break; 3840 3841 case HCI_STATE_FALLING_ASLEEP: 3842 switch(hci_stack->substate) { 3843 case HCI_FALLING_ASLEEP_DISCONNECT: 3844 log_info("HCI_STATE_FALLING_ASLEEP"); 3845 // close all open connections 3846 connection = (hci_connection_t *) hci_stack->connections; 3847 3848 #ifdef HAVE_PLATFORM_IPHONE_OS 3849 // don't close connections, if H4 supports power management 3850 if (btstack_control_iphone_power_management_enabled()){ 3851 connection = NULL; 3852 } 3853 #endif 3854 if (connection){ 3855 3856 // send disconnect 3857 if (!hci_can_send_command_packet_now()) return; 3858 3859 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3860 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3861 3862 // send disconnected event right away - causes higher layer connections to get closed, too. 3863 hci_shutdown_connection(connection); 3864 return; 3865 } 3866 3867 if (hci_classic_supported()){ 3868 // disable page and inquiry scan 3869 if (!hci_can_send_command_packet_now()) return; 3870 3871 log_info("HCI_STATE_HALTING, disabling inq scans"); 3872 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3873 3874 // continue in next sub state 3875 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3876 break; 3877 } 3878 // no break - fall through for ble-only chips 3879 3880 case HCI_FALLING_ASLEEP_COMPLETE: 3881 log_info("HCI_STATE_HALTING, calling sleep"); 3882 #ifdef HAVE_PLATFORM_IPHONE_OS 3883 // don't actually go to sleep, if H4 supports power management 3884 if (btstack_control_iphone_power_management_enabled()){ 3885 // SLEEP MODE reached 3886 hci_stack->state = HCI_STATE_SLEEPING; 3887 hci_emit_state(); 3888 break; 3889 } 3890 #endif 3891 // switch mode 3892 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3893 hci_emit_state(); 3894 break; 3895 3896 default: 3897 break; 3898 } 3899 break; 3900 3901 default: 3902 break; 3903 } 3904 } 3905 3906 int hci_send_cmd_packet(uint8_t *packet, int size){ 3907 // house-keeping 3908 3909 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3910 hci_stack->loopback_mode = packet[3]; 3911 } 3912 3913 #ifdef ENABLE_CLASSIC 3914 bd_addr_t addr; 3915 hci_connection_t * conn; 3916 3917 // create_connection? 3918 if (IS_COMMAND(packet, hci_create_connection)){ 3919 reverse_bd_addr(&packet[3], addr); 3920 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3921 3922 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3923 if (!conn){ 3924 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3925 if (!conn){ 3926 // notify client that alloc failed 3927 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3928 return -1; // packet not sent to controller 3929 } 3930 conn->state = SEND_CREATE_CONNECTION; 3931 } 3932 log_info("conn state %u", conn->state); 3933 switch (conn->state){ 3934 // if connection active exists 3935 case OPEN: 3936 // and OPEN, emit connection complete command 3937 hci_emit_connection_complete(addr, conn->con_handle, 0); 3938 return -1; // packet not sent to controller 3939 case SEND_CREATE_CONNECTION: 3940 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 3941 break; 3942 default: 3943 // otherwise, just ignore as it is already in the open process 3944 return -1; // packet not sent to controller 3945 } 3946 conn->state = SENT_CREATE_CONNECTION; 3947 3948 // track outgoing connection 3949 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 3950 memcpy(hci_stack->outgoing_addr, addr, 6); 3951 } 3952 3953 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3954 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3955 } 3956 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3957 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3958 } 3959 3960 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3961 if (hci_stack->link_key_db){ 3962 reverse_bd_addr(&packet[3], addr); 3963 hci_stack->link_key_db->delete_link_key(addr); 3964 } 3965 } 3966 3967 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3968 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3969 reverse_bd_addr(&packet[3], addr); 3970 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3971 if (conn){ 3972 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3973 } 3974 } 3975 3976 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3977 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3978 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3979 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3980 reverse_bd_addr(&packet[3], addr); 3981 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3982 if (conn){ 3983 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3984 } 3985 } 3986 3987 #ifdef ENABLE_SCO_OVER_HCI 3988 // setup_synchronous_connection? Voice setting at offset 22 3989 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3990 // TODO: compare to current setting if sco connection already active 3991 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3992 } 3993 // accept_synchronus_connection? Voice setting at offset 18 3994 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3995 // TODO: compare to current setting if sco connection already active 3996 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3997 } 3998 #endif 3999 #endif 4000 4001 #ifdef ENABLE_BLE 4002 if (IS_COMMAND(packet, hci_le_set_random_address)){ 4003 hci_stack->le_random_address_set = 1; 4004 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4005 } 4006 #ifdef ENABLE_LE_PERIPHERAL 4007 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 4008 hci_stack->le_advertisements_active = packet[3]; 4009 } 4010 #endif 4011 #ifdef ENABLE_LE_CENTRAL 4012 if (IS_COMMAND(packet, hci_le_create_connection)){ 4013 // white list used? 4014 uint8_t initiator_filter_policy = packet[7]; 4015 switch (initiator_filter_policy){ 4016 case 0: 4017 // whitelist not used 4018 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4019 break; 4020 case 1: 4021 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4022 break; 4023 default: 4024 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4025 break; 4026 } 4027 } 4028 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 4029 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4030 } 4031 #endif 4032 #endif 4033 4034 hci_stack->num_cmd_packets--; 4035 4036 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4037 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4038 } 4039 4040 // disconnect because of security block 4041 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4042 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4043 if (!connection) return; 4044 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4045 } 4046 4047 4048 // Configure Secure Simple Pairing 4049 4050 #ifdef ENABLE_CLASSIC 4051 4052 // enable will enable SSP during init 4053 void gap_ssp_set_enable(int enable){ 4054 hci_stack->ssp_enable = enable; 4055 } 4056 4057 static int hci_local_ssp_activated(void){ 4058 return gap_ssp_supported() && hci_stack->ssp_enable; 4059 } 4060 4061 // if set, BTstack will respond to io capability request using authentication requirement 4062 void gap_ssp_set_io_capability(int io_capability){ 4063 hci_stack->ssp_io_capability = io_capability; 4064 } 4065 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4066 hci_stack->ssp_authentication_requirement = authentication_requirement; 4067 } 4068 4069 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4070 void gap_ssp_set_auto_accept(int auto_accept){ 4071 hci_stack->ssp_auto_accept = auto_accept; 4072 } 4073 #endif 4074 4075 // va_list part of hci_send_cmd 4076 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4077 if (!hci_can_send_command_packet_now()){ 4078 log_error("hci_send_cmd called but cannot send packet now"); 4079 return 0; 4080 } 4081 4082 // for HCI INITIALIZATION 4083 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4084 hci_stack->last_cmd_opcode = cmd->opcode; 4085 4086 hci_reserve_packet_buffer(); 4087 uint8_t * packet = hci_stack->hci_packet_buffer; 4088 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4089 int err = hci_send_cmd_packet(packet, size); 4090 4091 // release packet buffer for synchronous transport implementations 4092 if (hci_transport_synchronous()){ 4093 hci_release_packet_buffer(); 4094 hci_emit_transport_packet_sent(); 4095 } 4096 4097 return err; 4098 } 4099 4100 /** 4101 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4102 */ 4103 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4104 va_list argptr; 4105 va_start(argptr, cmd); 4106 int res = hci_send_cmd_va_arg(cmd, argptr); 4107 va_end(argptr); 4108 return res; 4109 } 4110 4111 // Create various non-HCI events. 4112 // TODO: generalize, use table similar to hci_create_command 4113 4114 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4115 // dump packet 4116 if (dump) { 4117 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4118 } 4119 4120 // dispatch to all event handlers 4121 btstack_linked_list_iterator_t it; 4122 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4123 while (btstack_linked_list_iterator_has_next(&it)){ 4124 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4125 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4126 } 4127 } 4128 4129 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4130 if (!hci_stack->acl_packet_handler) return; 4131 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4132 } 4133 4134 #ifdef ENABLE_CLASSIC 4135 static void hci_notify_if_sco_can_send_now(void){ 4136 // notify SCO sender if waiting 4137 if (!hci_stack->sco_waiting_for_can_send_now) return; 4138 if (hci_can_send_sco_packet_now()){ 4139 hci_stack->sco_waiting_for_can_send_now = 0; 4140 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4141 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4142 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4143 } 4144 } 4145 4146 // parsing end emitting has been merged to reduce code size 4147 static void gap_inquiry_explode(uint8_t * packet){ 4148 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4149 4150 uint8_t * eir_data; 4151 ad_context_t context; 4152 const uint8_t * name; 4153 uint8_t name_len; 4154 4155 int event_type = hci_event_packet_get_type(packet); 4156 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 4157 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4158 4159 // event[1] is set at the end 4160 int i; 4161 for (i=0; i<num_responses;i++){ 4162 memset(event, 0, sizeof(event)); 4163 event[0] = GAP_EVENT_INQUIRY_RESULT; 4164 uint8_t event_size = 18; // if name is not set by EIR 4165 4166 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 4167 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 4168 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 4169 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 4170 4171 switch (event_type){ 4172 case HCI_EVENT_INQUIRY_RESULT: 4173 // 14,15,16,17 = 0, size 18 4174 break; 4175 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4176 event[14] = 1; 4177 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 4178 // 16,17 = 0, size 18 4179 break; 4180 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4181 event[14] = 1; 4182 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 4183 // for EIR packets, there is only one reponse in it 4184 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4185 name = NULL; 4186 // EIR data is 240 bytes in EIR event 4187 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4188 uint8_t data_type = ad_iterator_get_data_type(&context); 4189 uint8_t data_size = ad_iterator_get_data_len(&context); 4190 const uint8_t * data = ad_iterator_get_data(&context); 4191 // Prefer Complete Local Name over Shortend Local Name 4192 switch (data_type){ 4193 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4194 if (name) continue; 4195 /* explicit fall-through */ 4196 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4197 name = data; 4198 name_len = data_size; 4199 break; 4200 default: 4201 break; 4202 } 4203 } 4204 if (name){ 4205 event[16] = 1; 4206 // truncate name if needed 4207 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4208 event[17] = len; 4209 memcpy(&event[18], name, len); 4210 event_size += len; 4211 } 4212 break; 4213 } 4214 event[1] = event_size - 2; 4215 hci_emit_event(event, event_size, 1); 4216 } 4217 } 4218 #endif 4219 4220 void hci_emit_state(void){ 4221 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4222 uint8_t event[3]; 4223 event[0] = BTSTACK_EVENT_STATE; 4224 event[1] = sizeof(event) - 2; 4225 event[2] = hci_stack->state; 4226 hci_emit_event(event, sizeof(event), 1); 4227 } 4228 4229 #ifdef ENABLE_CLASSIC 4230 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4231 uint8_t event[13]; 4232 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4233 event[1] = sizeof(event) - 2; 4234 event[2] = status; 4235 little_endian_store_16(event, 3, con_handle); 4236 reverse_bd_addr(address, &event[5]); 4237 event[11] = 1; // ACL connection 4238 event[12] = 0; // encryption disabled 4239 hci_emit_event(event, sizeof(event), 1); 4240 } 4241 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4242 if (disable_l2cap_timeouts) return; 4243 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4244 uint8_t event[4]; 4245 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4246 event[1] = sizeof(event) - 2; 4247 little_endian_store_16(event, 2, conn->con_handle); 4248 hci_emit_event(event, sizeof(event), 1); 4249 } 4250 #endif 4251 4252 #ifdef ENABLE_BLE 4253 #ifdef ENABLE_LE_CENTRAL 4254 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4255 uint8_t event[21]; 4256 event[0] = HCI_EVENT_LE_META; 4257 event[1] = sizeof(event) - 2; 4258 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4259 event[3] = status; 4260 little_endian_store_16(event, 4, con_handle); 4261 event[6] = 0; // TODO: role 4262 event[7] = address_type; 4263 reverse_bd_addr(address, &event[8]); 4264 little_endian_store_16(event, 14, 0); // interval 4265 little_endian_store_16(event, 16, 0); // latency 4266 little_endian_store_16(event, 18, 0); // supervision timeout 4267 event[20] = 0; // master clock accuracy 4268 hci_emit_event(event, sizeof(event), 1); 4269 } 4270 #endif 4271 #endif 4272 4273 static void hci_emit_transport_packet_sent(void){ 4274 // notify upper stack that it might be possible to send again 4275 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4276 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4277 } 4278 4279 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4280 uint8_t event[6]; 4281 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4282 event[1] = sizeof(event) - 2; 4283 event[2] = 0; // status = OK 4284 little_endian_store_16(event, 3, con_handle); 4285 event[5] = reason; 4286 hci_emit_event(event, sizeof(event), 1); 4287 } 4288 4289 static void hci_emit_nr_connections_changed(void){ 4290 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4291 uint8_t event[3]; 4292 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4293 event[1] = sizeof(event) - 2; 4294 event[2] = nr_hci_connections(); 4295 hci_emit_event(event, sizeof(event), 1); 4296 } 4297 4298 static void hci_emit_hci_open_failed(void){ 4299 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4300 uint8_t event[2]; 4301 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4302 event[1] = sizeof(event) - 2; 4303 hci_emit_event(event, sizeof(event), 1); 4304 } 4305 4306 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4307 log_info("hci_emit_dedicated_bonding_result %u ", status); 4308 uint8_t event[9]; 4309 int pos = 0; 4310 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4311 event[pos++] = sizeof(event) - 2; 4312 event[pos++] = status; 4313 reverse_bd_addr(address, &event[pos]); 4314 hci_emit_event(event, sizeof(event), 1); 4315 } 4316 4317 4318 #ifdef ENABLE_CLASSIC 4319 4320 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4321 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4322 uint8_t event[5]; 4323 int pos = 0; 4324 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4325 event[pos++] = sizeof(event) - 2; 4326 little_endian_store_16(event, 2, con_handle); 4327 pos += 2; 4328 event[pos++] = level; 4329 hci_emit_event(event, sizeof(event), 1); 4330 } 4331 4332 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4333 if (!connection) return LEVEL_0; 4334 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4335 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4336 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4337 // LEVEL 4 always requires 128 bit encrytion key size 4338 if (security_level == LEVEL_4 && connection->encryption_key_size < 16){ 4339 security_level = LEVEL_3; 4340 } 4341 return security_level; 4342 } 4343 4344 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4345 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4346 uint8_t event[3]; 4347 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4348 event[1] = sizeof(event) - 2; 4349 event[2] = enabled; 4350 hci_emit_event(event, sizeof(event), 1); 4351 } 4352 4353 // query if remote side supports eSCO 4354 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4355 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4356 if (!connection) return 0; 4357 return connection->remote_supported_feature_eSCO; 4358 } 4359 4360 // query if remote side supports SSP 4361 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4362 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4363 if (!connection) return 0; 4364 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4365 } 4366 4367 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4368 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4369 } 4370 4371 // GAP API 4372 /** 4373 * @bbrief enable/disable bonding. default is enabled 4374 * @praram enabled 4375 */ 4376 void gap_set_bondable_mode(int enable){ 4377 hci_stack->bondable = enable ? 1 : 0; 4378 } 4379 /** 4380 * @brief Get bondable mode. 4381 * @return 1 if bondable 4382 */ 4383 int gap_get_bondable_mode(void){ 4384 return hci_stack->bondable; 4385 } 4386 4387 /** 4388 * @brief map link keys to security levels 4389 */ 4390 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4391 switch (link_key_type){ 4392 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4393 return LEVEL_4; 4394 case COMBINATION_KEY: 4395 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4396 return LEVEL_3; 4397 default: 4398 return LEVEL_2; 4399 } 4400 } 4401 4402 /** 4403 * @brief map link keys to secure connection yes/no 4404 */ 4405 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4406 switch (link_key_type){ 4407 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4408 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4409 return 1; 4410 default: 4411 return 0; 4412 } 4413 } 4414 4415 /** 4416 * @brief map link keys to authenticated 4417 */ 4418 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4419 switch (link_key_type){ 4420 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4421 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4422 return 1; 4423 default: 4424 return 0; 4425 } 4426 } 4427 4428 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4429 log_info("gap_mitm_protection_required_for_security_level %u", level); 4430 return level > LEVEL_2; 4431 } 4432 4433 /** 4434 * @brief get current security level 4435 */ 4436 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4437 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4438 if (!connection) return LEVEL_0; 4439 return gap_security_level_for_connection(connection); 4440 } 4441 4442 /** 4443 * @brief request connection to device to 4444 * @result GAP_AUTHENTICATION_RESULT 4445 */ 4446 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4447 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4448 if (!connection){ 4449 hci_emit_security_level(con_handle, LEVEL_0); 4450 return; 4451 } 4452 gap_security_level_t current_level = gap_security_level(con_handle); 4453 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4454 requested_level, connection->requested_security_level, current_level); 4455 4456 // assumption: earlier requested security higher than current level => security request is active 4457 if (current_level < connection->requested_security_level){ 4458 if (connection->requested_security_level < requested_level){ 4459 // increase requested level as new level is higher 4460 4461 // TODO: handle re-authentication when done 4462 4463 connection->requested_security_level = requested_level; 4464 } 4465 return; 4466 } 4467 4468 // no request active, notify if security sufficient 4469 if (requested_level <= current_level){ 4470 hci_emit_security_level(con_handle, current_level); 4471 return; 4472 } 4473 4474 // start pairing to increase security level 4475 connection->requested_security_level = requested_level; 4476 4477 #if 0 4478 // sending encryption request without a link key results in an error. 4479 // TODO: figure out how to use it properly 4480 4481 // would enabling ecnryption suffice (>= LEVEL_2)? 4482 if (hci_stack->link_key_db){ 4483 link_key_type_t link_key_type; 4484 link_key_t link_key; 4485 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4486 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4487 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4488 return; 4489 } 4490 } 4491 } 4492 #endif 4493 4494 // start to authenticate connection 4495 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4496 hci_run(); 4497 } 4498 4499 /** 4500 * @brief start dedicated bonding with device. disconnect after bonding 4501 * @param device 4502 * @param request MITM protection 4503 * @result GAP_DEDICATED_BONDING_COMPLETE 4504 */ 4505 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4506 4507 // create connection state machine 4508 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 4509 4510 if (!connection){ 4511 return BTSTACK_MEMORY_ALLOC_FAILED; 4512 } 4513 4514 // delete linkn key 4515 gap_drop_link_key_for_bd_addr(device); 4516 4517 // configure LEVEL_2/3, dedicated bonding 4518 connection->state = SEND_CREATE_CONNECTION; 4519 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4520 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4521 connection->bonding_flags = BONDING_DEDICATED; 4522 4523 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4524 4525 // handle: connnection failure (connection complete != ok) 4526 // handle: authentication failure 4527 // handle: disconnect on done 4528 4529 hci_run(); 4530 4531 return 0; 4532 } 4533 #endif 4534 4535 void gap_set_local_name(const char * local_name){ 4536 hci_stack->local_name = local_name; 4537 } 4538 4539 4540 #ifdef ENABLE_BLE 4541 4542 #ifdef ENABLE_LE_CENTRAL 4543 void gap_start_scan(void){ 4544 hci_stack->le_scanning_enabled = 1; 4545 hci_run(); 4546 } 4547 4548 void gap_stop_scan(void){ 4549 hci_stack->le_scanning_enabled = 0; 4550 hci_run(); 4551 } 4552 4553 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4554 hci_stack->le_scan_type = scan_type; 4555 hci_stack->le_scan_interval = scan_interval; 4556 hci_stack->le_scan_window = scan_window; 4557 hci_run(); 4558 } 4559 4560 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4561 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4562 if (!conn){ 4563 log_info("gap_connect: no connection exists yet, creating context"); 4564 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4565 if (!conn){ 4566 // notify client that alloc failed 4567 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4568 log_info("gap_connect: failed to alloc hci_connection_t"); 4569 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4570 } 4571 conn->state = SEND_CREATE_CONNECTION; 4572 log_info("gap_connect: send create connection next"); 4573 hci_run(); 4574 return 0; 4575 } 4576 4577 if (!hci_is_le_connection(conn) || 4578 conn->state == SEND_CREATE_CONNECTION || 4579 conn->state == SENT_CREATE_CONNECTION) { 4580 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4581 log_error("gap_connect: classic connection or connect is already being created"); 4582 return GATT_CLIENT_IN_WRONG_STATE; 4583 } 4584 4585 log_info("gap_connect: context exists with state %u", conn->state); 4586 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4587 hci_run(); 4588 return 0; 4589 } 4590 4591 // @assumption: only a single outgoing LE Connection exists 4592 static hci_connection_t * gap_get_outgoing_connection(void){ 4593 btstack_linked_item_t *it; 4594 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4595 hci_connection_t * conn = (hci_connection_t *) it; 4596 if (!hci_is_le_connection(conn)) continue; 4597 switch (conn->state){ 4598 case SEND_CREATE_CONNECTION: 4599 case SENT_CREATE_CONNECTION: 4600 case SENT_CANCEL_CONNECTION: 4601 return conn; 4602 default: 4603 break; 4604 }; 4605 } 4606 return NULL; 4607 } 4608 4609 uint8_t gap_connect_cancel(void){ 4610 hci_connection_t * conn = gap_get_outgoing_connection(); 4611 if (!conn) return 0; 4612 switch (conn->state){ 4613 case SEND_CREATE_CONNECTION: 4614 // skip sending create connection and emit event instead 4615 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4616 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4617 btstack_memory_hci_connection_free( conn ); 4618 break; 4619 case SENT_CREATE_CONNECTION: 4620 // request to send cancel connection 4621 conn->state = SEND_CANCEL_CONNECTION; 4622 hci_run(); 4623 break; 4624 default: 4625 break; 4626 } 4627 return 0; 4628 } 4629 #endif 4630 4631 #ifdef ENABLE_LE_CENTRAL 4632 /** 4633 * @brief Set connection parameters for outgoing connections 4634 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4635 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4636 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4637 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4638 * @param conn_latency, default: 4 4639 * @param supervision_timeout (unit: 10ms), default: 720 ms 4640 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4641 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4642 */ 4643 4644 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4645 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4646 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4647 hci_stack->le_connection_scan_interval = conn_scan_interval; 4648 hci_stack->le_connection_scan_window = conn_scan_window; 4649 hci_stack->le_connection_interval_min = conn_interval_min; 4650 hci_stack->le_connection_interval_max = conn_interval_max; 4651 hci_stack->le_connection_latency = conn_latency; 4652 hci_stack->le_supervision_timeout = supervision_timeout; 4653 hci_stack->le_minimum_ce_length = min_ce_length; 4654 hci_stack->le_maximum_ce_length = max_ce_length; 4655 } 4656 #endif 4657 4658 /** 4659 * @brief Updates the connection parameters for a given LE connection 4660 * @param handle 4661 * @param conn_interval_min (unit: 1.25ms) 4662 * @param conn_interval_max (unit: 1.25ms) 4663 * @param conn_latency 4664 * @param supervision_timeout (unit: 10ms) 4665 * @returns 0 if ok 4666 */ 4667 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4668 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4669 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4670 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4671 connection->le_conn_interval_min = conn_interval_min; 4672 connection->le_conn_interval_max = conn_interval_max; 4673 connection->le_conn_latency = conn_latency; 4674 connection->le_supervision_timeout = supervision_timeout; 4675 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4676 hci_run(); 4677 return 0; 4678 } 4679 4680 /** 4681 * @brief Request an update of the connection parameter for a given LE connection 4682 * @param handle 4683 * @param conn_interval_min (unit: 1.25ms) 4684 * @param conn_interval_max (unit: 1.25ms) 4685 * @param conn_latency 4686 * @param supervision_timeout (unit: 10ms) 4687 * @returns 0 if ok 4688 */ 4689 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4690 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4691 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4692 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4693 connection->le_conn_interval_min = conn_interval_min; 4694 connection->le_conn_interval_max = conn_interval_max; 4695 connection->le_conn_latency = conn_latency; 4696 connection->le_supervision_timeout = supervision_timeout; 4697 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4698 hci_run(); 4699 return 0; 4700 } 4701 4702 #ifdef ENABLE_LE_PERIPHERAL 4703 4704 static void gap_advertisments_changed(void){ 4705 // disable advertisements before updating adv, scan data, or adv params 4706 if (hci_stack->le_advertisements_active){ 4707 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4708 } 4709 hci_run(); 4710 } 4711 4712 /** 4713 * @brief Set Advertisement Data 4714 * @param advertising_data_length 4715 * @param advertising_data (max 31 octets) 4716 * @note data is not copied, pointer has to stay valid 4717 */ 4718 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4719 hci_stack->le_advertisements_data_len = advertising_data_length; 4720 hci_stack->le_advertisements_data = advertising_data; 4721 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4722 gap_advertisments_changed(); 4723 } 4724 4725 /** 4726 * @brief Set Scan Response Data 4727 * @param advertising_data_length 4728 * @param advertising_data (max 31 octets) 4729 * @note data is not copied, pointer has to stay valid 4730 */ 4731 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4732 hci_stack->le_scan_response_data_len = scan_response_data_length; 4733 hci_stack->le_scan_response_data = scan_response_data; 4734 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4735 gap_advertisments_changed(); 4736 } 4737 4738 /** 4739 * @brief Set Advertisement Parameters 4740 * @param adv_int_min 4741 * @param adv_int_max 4742 * @param adv_type 4743 * @param direct_address_type 4744 * @param direct_address 4745 * @param channel_map 4746 * @param filter_policy 4747 * 4748 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4749 */ 4750 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4751 uint8_t direct_address_typ, bd_addr_t direct_address, 4752 uint8_t channel_map, uint8_t filter_policy) { 4753 4754 hci_stack->le_advertisements_interval_min = adv_int_min; 4755 hci_stack->le_advertisements_interval_max = adv_int_max; 4756 hci_stack->le_advertisements_type = adv_type; 4757 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4758 hci_stack->le_advertisements_channel_map = channel_map; 4759 hci_stack->le_advertisements_filter_policy = filter_policy; 4760 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4761 4762 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4763 gap_advertisments_changed(); 4764 } 4765 4766 /** 4767 * @brief Enable/Disable Advertisements 4768 * @param enabled 4769 */ 4770 void gap_advertisements_enable(int enabled){ 4771 hci_stack->le_advertisements_enabled = enabled; 4772 if (enabled && !hci_stack->le_advertisements_active){ 4773 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4774 } 4775 if (!enabled && hci_stack->le_advertisements_active){ 4776 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4777 } 4778 hci_run(); 4779 } 4780 4781 #endif 4782 4783 void hci_le_set_own_address_type(uint8_t own_address_type){ 4784 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4785 if (own_address_type == hci_stack->le_own_addr_type) return; 4786 hci_stack->le_own_addr_type = own_address_type; 4787 4788 #ifdef ENABLE_LE_PERIPHERAL 4789 // update advertisement parameters, too 4790 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4791 gap_advertisments_changed(); 4792 #endif 4793 #ifdef ENABLE_LE_CENTRAL 4794 // note: we don't update scan parameters or modify ongoing connection attempts 4795 #endif 4796 } 4797 4798 #endif 4799 4800 uint8_t gap_disconnect(hci_con_handle_t handle){ 4801 hci_connection_t * conn = hci_connection_for_handle(handle); 4802 if (!conn){ 4803 hci_emit_disconnection_complete(handle, 0); 4804 return 0; 4805 } 4806 // ignore if already disconnected 4807 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4808 return 0; 4809 } 4810 conn->state = SEND_DISCONNECT; 4811 hci_run(); 4812 return 0; 4813 } 4814 4815 int gap_read_rssi(hci_con_handle_t con_handle){ 4816 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 4817 if (hci_connection == NULL) return 0; 4818 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 4819 hci_run(); 4820 return 1; 4821 } 4822 4823 /** 4824 * @brief Get connection type 4825 * @param con_handle 4826 * @result connection_type 4827 */ 4828 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4829 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4830 if (!conn) return GAP_CONNECTION_INVALID; 4831 switch (conn->address_type){ 4832 case BD_ADDR_TYPE_LE_PUBLIC: 4833 case BD_ADDR_TYPE_LE_RANDOM: 4834 return GAP_CONNECTION_LE; 4835 case BD_ADDR_TYPE_SCO: 4836 return GAP_CONNECTION_SCO; 4837 case BD_ADDR_TYPE_ACL: 4838 return GAP_CONNECTION_ACL; 4839 default: 4840 return GAP_CONNECTION_INVALID; 4841 } 4842 } 4843 4844 #ifdef ENABLE_BLE 4845 4846 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){ 4847 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4848 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4849 4850 conn->le_phy_update_all_phys = all_phys; 4851 conn->le_phy_update_tx_phys = tx_phys; 4852 conn->le_phy_update_rx_phys = rx_phys; 4853 conn->le_phy_update_phy_options = phy_options; 4854 4855 hci_run(); 4856 4857 return 0; 4858 } 4859 4860 #ifdef ENABLE_LE_CENTRAL 4861 /** 4862 * @brief Auto Connection Establishment - Start Connecting to device 4863 * @param address_typ 4864 * @param address 4865 * @returns 0 if ok 4866 */ 4867 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4868 // check capacity 4869 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4870 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4871 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4872 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4873 entry->address_type = address_type; 4874 memcpy(entry->address, address, 6); 4875 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4876 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4877 hci_run(); 4878 return 0; 4879 } 4880 4881 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4882 btstack_linked_list_iterator_t it; 4883 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4884 while (btstack_linked_list_iterator_has_next(&it)){ 4885 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4886 if (entry->address_type != address_type) continue; 4887 if (memcmp(entry->address, address, 6) != 0) continue; 4888 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4889 // remove from controller if already present 4890 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4891 continue; 4892 } 4893 // direclty remove entry from whitelist 4894 btstack_linked_list_iterator_remove(&it); 4895 btstack_memory_whitelist_entry_free(entry); 4896 } 4897 } 4898 4899 /** 4900 * @brief Auto Connection Establishment - Stop Connecting to device 4901 * @param address_typ 4902 * @param address 4903 * @returns 0 if ok 4904 */ 4905 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4906 hci_remove_from_whitelist(address_type, address); 4907 hci_run(); 4908 return 0; 4909 } 4910 4911 /** 4912 * @brief Auto Connection Establishment - Stop everything 4913 * @note Convenience function to stop all active auto connection attempts 4914 */ 4915 void gap_auto_connection_stop_all(void){ 4916 btstack_linked_list_iterator_t it; 4917 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4918 while (btstack_linked_list_iterator_has_next(&it)){ 4919 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4920 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4921 // remove from controller if already present 4922 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4923 continue; 4924 } 4925 // directly remove entry from whitelist 4926 btstack_linked_list_iterator_remove(&it); 4927 btstack_memory_whitelist_entry_free(entry); 4928 } 4929 hci_run(); 4930 } 4931 4932 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 4933 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4934 if (!conn) return 0; 4935 return conn->le_connection_interval; 4936 } 4937 #endif 4938 #endif 4939 4940 #ifdef ENABLE_CLASSIC 4941 /** 4942 * @brief Set Extended Inquiry Response data 4943 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4944 * @note has to be done before stack starts up 4945 */ 4946 void gap_set_extended_inquiry_response(const uint8_t * data){ 4947 hci_stack->eir_data = data; 4948 } 4949 4950 /** 4951 * @brief Start GAP Classic Inquiry 4952 * @param duration in 1.28s units 4953 * @return 0 if ok 4954 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4955 */ 4956 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4957 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 4958 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4959 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4960 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4961 } 4962 hci_stack->inquiry_state = duration_in_1280ms_units; 4963 hci_run(); 4964 return 0; 4965 } 4966 4967 /** 4968 * @brief Stop GAP Classic Inquiry 4969 * @returns 0 if ok 4970 */ 4971 int gap_inquiry_stop(void){ 4972 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4973 // emit inquiry complete event, before it even started 4974 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4975 hci_emit_event(event, sizeof(event), 1); 4976 return 0; 4977 } 4978 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4979 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4980 hci_run(); 4981 return 0; 4982 } 4983 4984 4985 /** 4986 * @brief Remote Name Request 4987 * @param addr 4988 * @param page_scan_repetition_mode 4989 * @param clock_offset only used when bit 15 is set 4990 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4991 */ 4992 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4993 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4994 memcpy(hci_stack->remote_name_addr, addr, 6); 4995 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4996 hci_stack->remote_name_clock_offset = clock_offset; 4997 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4998 hci_run(); 4999 return 0; 5000 } 5001 5002 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 5003 hci_stack->gap_pairing_state = state; 5004 memcpy(hci_stack->gap_pairing_addr, addr, 6); 5005 hci_run(); 5006 return 0; 5007 } 5008 5009 /** 5010 * @brief Legacy Pairing Pin Code Response 5011 * @param addr 5012 * @param pin 5013 * @return 0 if ok 5014 */ 5015 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 5016 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5017 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 5018 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5019 } 5020 5021 /** 5022 * @brief Abort Legacy Pairing 5023 * @param addr 5024 * @param pin 5025 * @return 0 if ok 5026 */ 5027 int gap_pin_code_negative(bd_addr_t addr){ 5028 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5029 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5030 } 5031 5032 /** 5033 * @brief SSP Passkey Response 5034 * @param addr 5035 * @param passkey 5036 * @return 0 if ok 5037 */ 5038 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5039 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5040 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5041 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5042 } 5043 5044 /** 5045 * @brief Abort SSP Passkey Entry/Pairing 5046 * @param addr 5047 * @param pin 5048 * @return 0 if ok 5049 */ 5050 int gap_ssp_passkey_negative(bd_addr_t addr){ 5051 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5052 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5053 } 5054 5055 /** 5056 * @brief Accept SSP Numeric Comparison 5057 * @param addr 5058 * @param passkey 5059 * @return 0 if ok 5060 */ 5061 int gap_ssp_confirmation_response(bd_addr_t addr){ 5062 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5063 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5064 } 5065 5066 /** 5067 * @brief Abort SSP Numeric Comparison/Pairing 5068 * @param addr 5069 * @param pin 5070 * @return 0 if ok 5071 */ 5072 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5073 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5074 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5075 } 5076 5077 /** 5078 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5079 * @param inquiry_mode see bluetooth_defines.h 5080 */ 5081 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5082 hci_stack->inquiry_mode = mode; 5083 } 5084 5085 /** 5086 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5087 */ 5088 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5089 hci_stack->sco_voice_setting = voice_setting; 5090 } 5091 5092 /** 5093 * @brief Get SCO Voice Setting 5094 * @return current voice setting 5095 */ 5096 uint16_t hci_get_sco_voice_setting(void){ 5097 return hci_stack->sco_voice_setting; 5098 } 5099 5100 static int hci_have_usb_transport(void){ 5101 if (!hci_stack->hci_transport) return 0; 5102 const char * transport_name = hci_stack->hci_transport->name; 5103 if (!transport_name) return 0; 5104 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5105 } 5106 5107 /** @brief Get SCO packet length for current SCO Voice setting 5108 * @note Using SCO packets of the exact length is required for USB transfer 5109 * @return Length of SCO packets in bytes (not audio frames) 5110 */ 5111 int hci_get_sco_packet_length(void){ 5112 int sco_packet_length = 0; 5113 5114 #ifdef ENABLE_SCO_OVER_HCI 5115 5116 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5117 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5118 5119 if (hci_have_usb_transport()){ 5120 // see Core Spec for H2 USB Transfer. 5121 // 3 byte SCO header + 24 bytes per connection 5122 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5123 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5124 } else { 5125 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5126 sco_packet_length = 3 + 60 * multiplier; 5127 // assert that it still fits inside an SCO buffer 5128 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5129 sco_packet_length = 3 + 60; 5130 } 5131 } 5132 #endif 5133 return sco_packet_length; 5134 } 5135 5136 /** 5137 * @brief Sets the master/slave policy 5138 * @param policy (0: attempt to become master, 1: let connecting device decide) 5139 */ 5140 void hci_set_master_slave_policy(uint8_t policy){ 5141 hci_stack->master_slave_policy = policy; 5142 } 5143 5144 #endif 5145 5146 HCI_STATE hci_get_state(void){ 5147 return hci_stack->state; 5148 } 5149 5150 #ifdef ENABLE_CLASSIC 5151 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5152 hci_stack->gap_classic_accept_callback = accept_callback; 5153 } 5154 #endif 5155 5156 /** 5157 * @brief Set callback for Bluetooth Hardware Error 5158 */ 5159 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5160 hci_stack->hardware_error_callback = fn; 5161 } 5162 5163 void hci_disconnect_all(void){ 5164 btstack_linked_list_iterator_t it; 5165 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5166 while (btstack_linked_list_iterator_has_next(&it)){ 5167 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5168 if (con->state == SENT_DISCONNECT) continue; 5169 con->state = SEND_DISCONNECT; 5170 } 5171 hci_run(); 5172 } 5173 5174 uint16_t hci_get_manufacturer(void){ 5175 return hci_stack->manufacturer; 5176 } 5177 5178 #ifdef ENABLE_BLE 5179 5180 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5181 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5182 if (!hci_con) return NULL; 5183 return &hci_con->sm_connection; 5184 } 5185 5186 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5187 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5188 5189 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5190 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5191 if (hci_connection == NULL) return 0; 5192 if (hci_is_le_connection(hci_connection)){ 5193 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5194 if (sm_conn->sm_connection_encrypted) { 5195 return sm_conn->sm_actual_encryption_key_size; 5196 } 5197 } 5198 #ifdef ENABLE_CLASSIC 5199 else { 5200 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5201 return hci_connection->encryption_key_size; 5202 } 5203 } 5204 #endif 5205 return 0; 5206 } 5207 5208 int gap_authenticated(hci_con_handle_t con_handle){ 5209 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5210 if (hci_connection == NULL) return 0; 5211 5212 switch (hci_connection->address_type){ 5213 case BD_ADDR_TYPE_LE_PUBLIC: 5214 case BD_ADDR_TYPE_LE_RANDOM: 5215 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5216 return hci_connection->sm_connection.sm_connection_authenticated; 5217 #ifdef ENABLE_CLASSIC 5218 case BD_ADDR_TYPE_SCO: 5219 case BD_ADDR_TYPE_ACL: 5220 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5221 #endif 5222 default: 5223 return 0; 5224 } 5225 } 5226 5227 int gap_secure_connection(hci_con_handle_t con_handle){ 5228 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5229 if (hci_connection == NULL) return 0; 5230 5231 switch (hci_connection->address_type){ 5232 case BD_ADDR_TYPE_LE_PUBLIC: 5233 case BD_ADDR_TYPE_LE_RANDOM: 5234 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5235 return hci_connection->sm_connection.sm_connection_sc; 5236 #ifdef ENABLE_CLASSIC 5237 case BD_ADDR_TYPE_SCO: 5238 case BD_ADDR_TYPE_ACL: 5239 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5240 #endif 5241 default: 5242 return 0; 5243 } 5244 } 5245 5246 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5247 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5248 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5249 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5250 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5251 return sm_conn->sm_connection_authorization_state; 5252 } 5253 #endif 5254 5255 #ifdef ENABLE_CLASSIC 5256 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){ 5257 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5258 if (!conn) return GAP_CONNECTION_INVALID; 5259 conn->sniff_min_interval = sniff_min_interval; 5260 conn->sniff_max_interval = sniff_max_interval; 5261 conn->sniff_attempt = sniff_attempt; 5262 conn->sniff_timeout = sniff_timeout; 5263 hci_run(); 5264 return 0; 5265 } 5266 5267 /** 5268 * @brief Exit Sniff mode 5269 * @param con_handle 5270 @ @return 0 if ok 5271 */ 5272 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5273 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5274 if (!conn) return GAP_CONNECTION_INVALID; 5275 conn->sniff_min_interval = 0xffff; 5276 hci_run(); 5277 return 0; 5278 } 5279 #endif 5280 5281 void hci_halting_defer(void){ 5282 if (hci_stack->state != HCI_STATE_HALTING) return; 5283 switch (hci_stack->substate){ 5284 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5285 case HCI_HALTING_CLOSE: 5286 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5287 break; 5288 default: 5289 break; 5290 } 5291 } 5292