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 != NULL ; it = it->next){ 443 count++; 444 } 445 return count; 446 } 447 448 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 449 450 unsigned int num_packets_sent_classic = 0; 451 unsigned int num_packets_sent_le = 0; 452 453 btstack_linked_item_t *it; 454 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 455 hci_connection_t * connection = (hci_connection_t *) it; 456 if (hci_is_le_connection(connection)){ 457 num_packets_sent_le += connection->num_packets_sent; 458 } 459 if (connection->address_type == BD_ADDR_TYPE_ACL){ 460 num_packets_sent_classic += connection->num_packets_sent; 461 } 462 } 463 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 464 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 465 int free_slots_le = 0; 466 467 if (free_slots_classic < 0){ 468 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); 469 return 0; 470 } 471 472 if (hci_stack->le_acl_packets_total_num){ 473 // if we have LE slots, they are used 474 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 475 if (free_slots_le < 0){ 476 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); 477 return 0; 478 } 479 } else { 480 // otherwise, classic slots are used for LE, too 481 free_slots_classic -= num_packets_sent_le; 482 if (free_slots_classic < 0){ 483 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); 484 return 0; 485 } 486 } 487 488 switch (address_type){ 489 case BD_ADDR_TYPE_UNKNOWN: 490 log_error("hci_number_free_acl_slots: unknown address type"); 491 return 0; 492 493 case BD_ADDR_TYPE_ACL: 494 return free_slots_classic; 495 496 default: 497 if (hci_stack->le_acl_packets_total_num){ 498 return free_slots_le; 499 } 500 return free_slots_classic; 501 } 502 } 503 504 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 505 // get connection type 506 hci_connection_t * connection = hci_connection_for_handle(con_handle); 507 if (!connection){ 508 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 509 return 0; 510 } 511 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 512 } 513 514 #ifdef ENABLE_CLASSIC 515 static int hci_number_free_sco_slots(void){ 516 unsigned int num_sco_packets_sent = 0; 517 btstack_linked_item_t *it; 518 if (hci_stack->synchronous_flow_control_enabled){ 519 // explicit flow control 520 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 521 hci_connection_t * connection = (hci_connection_t *) it; 522 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 523 num_sco_packets_sent += connection->num_packets_sent; 524 } 525 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 526 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 527 return 0; 528 } 529 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 530 } else { 531 // implicit flow control -- TODO 532 int num_ready = 0; 533 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 534 hci_connection_t * connection = (hci_connection_t *) it; 535 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 536 if (connection->sco_tx_ready == 0) continue; 537 num_ready++; 538 } 539 return num_ready; 540 } 541 } 542 #endif 543 544 // only used to send HCI Host Number Completed Packets 545 static int hci_can_send_comand_packet_transport(void){ 546 if (hci_stack->hci_packet_buffer_reserved) return 0; 547 548 // check for async hci transport implementations 549 if (hci_stack->hci_transport->can_send_packet_now){ 550 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 551 return 0; 552 } 553 } 554 return 1; 555 } 556 557 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 558 int hci_can_send_command_packet_now(void){ 559 if (hci_can_send_comand_packet_transport() == 0) return 0; 560 return hci_stack->num_cmd_packets > 0; 561 } 562 563 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 564 // check for async hci transport implementations 565 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 566 return hci_stack->hci_transport->can_send_packet_now(packet_type); 567 } 568 569 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 570 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 571 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 572 } 573 574 int hci_can_send_acl_le_packet_now(void){ 575 if (hci_stack->hci_packet_buffer_reserved) return 0; 576 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 577 } 578 579 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 580 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 581 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 582 } 583 584 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 585 if (hci_stack->hci_packet_buffer_reserved) return 0; 586 return hci_can_send_prepared_acl_packet_now(con_handle); 587 } 588 589 #ifdef ENABLE_CLASSIC 590 int hci_can_send_acl_classic_packet_now(void){ 591 if (hci_stack->hci_packet_buffer_reserved) return 0; 592 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 593 } 594 595 int hci_can_send_prepared_sco_packet_now(void){ 596 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 597 if (hci_have_usb_transport()){ 598 return hci_stack->sco_can_send_now; 599 } else { 600 return hci_number_free_sco_slots() > 0; 601 } 602 } 603 604 int hci_can_send_sco_packet_now(void){ 605 if (hci_stack->hci_packet_buffer_reserved) return 0; 606 return hci_can_send_prepared_sco_packet_now(); 607 } 608 609 void hci_request_sco_can_send_now_event(void){ 610 hci_stack->sco_waiting_for_can_send_now = 1; 611 hci_notify_if_sco_can_send_now(); 612 } 613 #endif 614 615 // used for internal checks in l2cap.c 616 int hci_is_packet_buffer_reserved(void){ 617 return hci_stack->hci_packet_buffer_reserved; 618 } 619 620 // reserves outgoing packet buffer. @returns 1 if successful 621 int hci_reserve_packet_buffer(void){ 622 if (hci_stack->hci_packet_buffer_reserved) { 623 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 624 return 0; 625 } 626 hci_stack->hci_packet_buffer_reserved = 1; 627 return 1; 628 } 629 630 void hci_release_packet_buffer(void){ 631 hci_stack->hci_packet_buffer_reserved = 0; 632 } 633 634 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 635 static int hci_transport_synchronous(void){ 636 return hci_stack->hci_transport->can_send_packet_now == NULL; 637 } 638 639 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 640 641 // 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); 642 643 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 644 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 645 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0)){ 646 max_acl_data_packet_length = hci_stack->le_data_packets_length; 647 } 648 649 // testing: reduce buffer to minimum 650 // max_acl_data_packet_length = 52; 651 652 log_debug("hci_send_acl_packet_fragments entered"); 653 654 int err; 655 // multiple packets could be send on a synchronous HCI transport 656 while (true){ 657 658 log_debug("hci_send_acl_packet_fragments loop entered"); 659 660 // get current data 661 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 662 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 663 int more_fragments = 0; 664 665 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 666 if (current_acl_data_packet_length > max_acl_data_packet_length){ 667 more_fragments = 1; 668 current_acl_data_packet_length = max_acl_data_packet_length; 669 } 670 671 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 672 if (acl_header_pos > 0){ 673 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 674 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 675 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 676 } 677 678 // update header len 679 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 680 681 // count packet 682 connection->num_packets_sent++; 683 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 684 685 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 686 if (more_fragments){ 687 // update start of next fragment to send 688 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 689 } else { 690 // done 691 hci_stack->acl_fragmentation_pos = 0; 692 hci_stack->acl_fragmentation_total_size = 0; 693 } 694 695 // send packet 696 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 697 const int size = current_acl_data_packet_length + 4; 698 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 699 hci_stack->acl_fragmentation_tx_active = 1; 700 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 701 702 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 703 704 // done yet? 705 if (!more_fragments) break; 706 707 // can send more? 708 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 709 } 710 711 log_debug("hci_send_acl_packet_fragments loop over"); 712 713 // release buffer now for synchronous transport 714 if (hci_transport_synchronous()){ 715 hci_stack->acl_fragmentation_tx_active = 0; 716 hci_release_packet_buffer(); 717 hci_emit_transport_packet_sent(); 718 } 719 720 return err; 721 } 722 723 // pre: caller has reserved the packet buffer 724 int hci_send_acl_packet_buffer(int size){ 725 726 // log_info("hci_send_acl_packet_buffer size %u", size); 727 728 if (!hci_stack->hci_packet_buffer_reserved) { 729 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 730 return 0; 731 } 732 733 uint8_t * packet = hci_stack->hci_packet_buffer; 734 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 735 736 // check for free places on Bluetooth module 737 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 738 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 739 hci_release_packet_buffer(); 740 hci_emit_transport_packet_sent(); 741 return BTSTACK_ACL_BUFFERS_FULL; 742 } 743 744 hci_connection_t *connection = hci_connection_for_handle( con_handle); 745 if (!connection) { 746 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 747 hci_release_packet_buffer(); 748 hci_emit_transport_packet_sent(); 749 return 0; 750 } 751 752 #ifdef ENABLE_CLASSIC 753 hci_connection_timestamp(connection); 754 #endif 755 756 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 757 758 // setup data 759 hci_stack->acl_fragmentation_total_size = size; 760 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 761 762 return hci_send_acl_packet_fragments(connection); 763 } 764 765 #ifdef ENABLE_CLASSIC 766 // pre: caller has reserved the packet buffer 767 int hci_send_sco_packet_buffer(int size){ 768 769 // log_info("hci_send_acl_packet_buffer size %u", size); 770 771 if (!hci_stack->hci_packet_buffer_reserved) { 772 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 773 return 0; 774 } 775 776 uint8_t * packet = hci_stack->hci_packet_buffer; 777 778 // skip checks in loopback mode 779 if (!hci_stack->loopback_mode){ 780 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 781 782 // check for free places on Bluetooth module 783 if (!hci_can_send_prepared_sco_packet_now()) { 784 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 785 hci_release_packet_buffer(); 786 hci_emit_transport_packet_sent(); 787 return BTSTACK_ACL_BUFFERS_FULL; 788 } 789 790 // track send packet in connection struct 791 hci_connection_t *connection = hci_connection_for_handle( con_handle); 792 if (!connection) { 793 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 794 hci_release_packet_buffer(); 795 hci_emit_transport_packet_sent(); 796 return 0; 797 } 798 799 if (hci_have_usb_transport()){ 800 // token used 801 hci_stack->sco_can_send_now = 0; 802 } else { 803 if (hci_stack->synchronous_flow_control_enabled){ 804 connection->num_packets_sent++; 805 } else { 806 connection->sco_tx_ready--; 807 } 808 } 809 } 810 811 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 812 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 813 814 if (hci_transport_synchronous()){ 815 hci_release_packet_buffer(); 816 hci_emit_transport_packet_sent(); 817 } 818 819 return err; 820 } 821 #endif 822 823 static void acl_handler(uint8_t *packet, int size){ 824 825 // log_info("acl_handler: size %u", size); 826 827 // get info 828 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 829 hci_connection_t *conn = hci_connection_for_handle(con_handle); 830 uint8_t acl_flags = READ_ACL_FLAGS(packet); 831 uint16_t acl_length = READ_ACL_LENGTH(packet); 832 833 // ignore non-registered handle 834 if (!conn){ 835 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 836 return; 837 } 838 839 // assert packet is complete 840 if ((acl_length + 4) != size){ 841 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 842 return; 843 } 844 845 #ifdef ENABLE_CLASSIC 846 // update idle timestamp 847 hci_connection_timestamp(conn); 848 #endif 849 850 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 851 hci_stack->host_completed_packets = 1; 852 conn->num_packets_completed++; 853 #endif 854 855 // handle different packet types 856 switch (acl_flags & 0x03) { 857 858 case 0x01: // continuation fragment 859 860 // sanity checks 861 if (conn->acl_recombination_pos == 0) { 862 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 863 return; 864 } 865 if ((conn->acl_recombination_pos + acl_length) > (4 + HCI_ACL_BUFFER_SIZE)){ 866 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 867 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 868 conn->acl_recombination_pos = 0; 869 return; 870 } 871 872 // append fragment payload (header already stored) 873 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 874 &packet[4], acl_length); 875 conn->acl_recombination_pos += acl_length; 876 877 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 878 // conn->acl_recombination_pos, conn->acl_recombination_length); 879 880 // forward complete L2CAP packet if complete. 881 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4 + 4)){ // pos already incl. ACL header 882 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 883 // reset recombination buffer 884 conn->acl_recombination_length = 0; 885 conn->acl_recombination_pos = 0; 886 } 887 break; 888 889 case 0x02: { // first fragment 890 891 // sanity check 892 if (conn->acl_recombination_pos) { 893 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 894 conn->acl_recombination_pos = 0; 895 } 896 897 // peek into L2CAP packet! 898 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 899 900 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 901 902 // compare fragment size to L2CAP packet size 903 if (acl_length >= (l2cap_length + 4)){ 904 // forward fragment as L2CAP packet 905 hci_emit_acl_packet(packet, acl_length + 4); 906 } else { 907 908 if (acl_length > HCI_ACL_BUFFER_SIZE){ 909 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 910 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 911 return; 912 } 913 914 // store first fragment and tweak acl length for complete package 915 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 916 packet, acl_length + 4); 917 conn->acl_recombination_pos = acl_length + 4; 918 conn->acl_recombination_length = l2cap_length; 919 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 920 } 921 break; 922 923 } 924 default: 925 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 926 return; 927 } 928 929 // execute main loop 930 hci_run(); 931 } 932 933 static void hci_shutdown_connection(hci_connection_t *conn){ 934 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 935 936 #ifdef ENABLE_CLASSIC 937 #ifdef ENABLE_SCO_OVER_HCI 938 int addr_type = conn->address_type; 939 #endif 940 #endif 941 942 btstack_run_loop_remove_timer(&conn->timeout); 943 944 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 945 btstack_memory_hci_connection_free( conn ); 946 947 // now it's gone 948 hci_emit_nr_connections_changed(); 949 950 #ifdef ENABLE_CLASSIC 951 #ifdef ENABLE_SCO_OVER_HCI 952 // update SCO 953 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 954 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 955 } 956 #endif 957 #endif 958 } 959 960 #ifdef ENABLE_CLASSIC 961 962 static const uint16_t packet_type_sizes[] = { 963 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 964 HCI_ACL_DH1_SIZE, 0, 0, 0, 965 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 966 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 967 }; 968 static const uint8_t packet_type_feature_requirement_bit[] = { 969 0, // 3 slot packets 970 1, // 5 slot packets 971 25, // EDR 2 mpbs 972 26, // EDR 3 mbps 973 39, // 3 slot EDR packts 974 40, // 5 slot EDR packet 975 }; 976 static const uint16_t packet_type_feature_packet_mask[] = { 977 0x0f00, // 3 slot packets 978 0xf000, // 5 slot packets 979 0x1102, // EDR 2 mpbs 980 0x2204, // EDR 3 mbps 981 0x0300, // 3 slot EDR packts 982 0x3000, // 5 slot EDR packet 983 }; 984 985 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 986 // enable packet types based on size 987 uint16_t packet_types = 0; 988 unsigned int i; 989 for (i=0;i<16;i++){ 990 if (packet_type_sizes[i] == 0) continue; 991 if (packet_type_sizes[i] <= buffer_size){ 992 packet_types |= 1 << i; 993 } 994 } 995 // disable packet types due to missing local supported features 996 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 997 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 998 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 999 if (feature_set) continue; 1000 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1001 packet_types &= ~packet_type_feature_packet_mask[i]; 1002 } 1003 // flip bits for "may not be used" 1004 packet_types ^= 0x3306; 1005 return packet_types; 1006 } 1007 1008 uint16_t hci_usable_acl_packet_types(void){ 1009 return hci_stack->packet_types; 1010 } 1011 #endif 1012 1013 uint8_t* hci_get_outgoing_packet_buffer(void){ 1014 // hci packet buffer is >= acl data packet length 1015 return hci_stack->hci_packet_buffer; 1016 } 1017 1018 uint16_t hci_max_acl_data_packet_length(void){ 1019 return hci_stack->acl_data_packet_length; 1020 } 1021 1022 #ifdef ENABLE_CLASSIC 1023 int hci_extended_sco_link_supported(void){ 1024 // No. 31, byte 3, bit 7 1025 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1026 } 1027 #endif 1028 1029 int hci_non_flushable_packet_boundary_flag_supported(void){ 1030 // No. 54, byte 6, bit 6 1031 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 1032 } 1033 1034 static int gap_ssp_supported(void){ 1035 // No. 51, byte 6, bit 3 1036 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 1037 } 1038 1039 static int hci_classic_supported(void){ 1040 #ifdef ENABLE_CLASSIC 1041 // No. 37, byte 4, bit 5, = No BR/EDR Support 1042 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1043 #else 1044 return 0; 1045 #endif 1046 } 1047 1048 static int hci_le_supported(void){ 1049 #ifdef ENABLE_BLE 1050 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1051 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1052 #else 1053 return 0; 1054 #endif 1055 } 1056 1057 #ifdef ENABLE_BLE 1058 1059 /** 1060 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1061 */ 1062 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1063 *addr_type = hci_stack->le_own_addr_type; 1064 if (hci_stack->le_own_addr_type){ 1065 (void)memcpy(addr, hci_stack->le_random_address, 6); 1066 } else { 1067 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1068 } 1069 } 1070 1071 #ifdef ENABLE_LE_CENTRAL 1072 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1073 1074 int offset = 3; 1075 int num_reports = packet[offset]; 1076 offset += 1; 1077 1078 int i; 1079 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1080 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1081 for (i=0; (i<num_reports) && (offset < size);i++){ 1082 // sanity checks on data_length: 1083 uint8_t data_length = packet[offset + 8]; 1084 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1085 if ((offset + 9 + data_length + 1) > size) return; 1086 // setup event 1087 uint8_t event_size = 10 + data_length; 1088 int pos = 0; 1089 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1090 event[pos++] = event_size; 1091 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1092 offset += 8; 1093 pos += 8; 1094 event[pos++] = packet[offset + 1 + data_length]; // rssi 1095 event[pos++] = data_length; 1096 offset++; 1097 (void)memcpy(&event[pos], &packet[offset], data_length); 1098 pos += data_length; 1099 offset += data_length + 1; // rssi 1100 hci_emit_event(event, pos, 1); 1101 } 1102 } 1103 #endif 1104 #endif 1105 1106 #ifdef ENABLE_BLE 1107 #ifdef ENABLE_LE_PERIPHERAL 1108 static void hci_reenable_advertisements_if_needed(void){ 1109 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1110 // get number of active le slave connections 1111 int num_slave_connections = 0; 1112 btstack_linked_list_iterator_t it; 1113 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1114 while (btstack_linked_list_iterator_has_next(&it)){ 1115 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1116 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1117 if (con->state != OPEN) continue; 1118 if (con->role != HCI_ROLE_SLAVE) continue; 1119 if (!hci_is_le_connection(con)) continue; 1120 num_slave_connections++; 1121 } 1122 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1123 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1124 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1125 } 1126 } 1127 } 1128 #endif 1129 #endif 1130 1131 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1132 1133 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1134 if (!hci_stack->config) return 0; 1135 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1136 // Limit baud rate for Broadcom chipsets to 3 mbps 1137 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1138 baud_rate = 3000000; 1139 } 1140 return baud_rate; 1141 } 1142 1143 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1144 UNUSED(ds); 1145 1146 switch (hci_stack->substate){ 1147 case HCI_INIT_W4_SEND_RESET: 1148 log_info("Resend HCI Reset"); 1149 hci_stack->substate = HCI_INIT_SEND_RESET; 1150 hci_stack->num_cmd_packets = 1; 1151 hci_run(); 1152 break; 1153 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1154 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1155 if (hci_stack->hci_transport->reset_link){ 1156 hci_stack->hci_transport->reset_link(); 1157 } 1158 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1159 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1160 log_info("Resend HCI Reset - CSR Warm Boot"); 1161 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1162 hci_stack->num_cmd_packets = 1; 1163 hci_run(); 1164 break; 1165 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1166 if (hci_stack->hci_transport->set_baudrate){ 1167 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1168 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1169 hci_stack->hci_transport->set_baudrate(baud_rate); 1170 } 1171 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1172 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1173 if (hci_stack->hci_transport->reset_link){ 1174 log_info("Link Reset"); 1175 hci_stack->hci_transport->reset_link(); 1176 } 1177 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1178 hci_run(); 1179 } 1180 break; 1181 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1182 // otherwise continue 1183 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1184 hci_send_cmd(&hci_read_local_supported_commands); 1185 break; 1186 default: 1187 break; 1188 } 1189 } 1190 #endif 1191 1192 static void hci_initializing_next_state(void){ 1193 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1194 } 1195 1196 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_PERIPHERAL) 1197 static void hci_replace_bd_addr_placeholder(uint8_t * data, uint16_t size){ 1198 const int bd_addr_string_len = 17; 1199 int i = 0; 1200 while (i < (size - bd_addr_string_len)){ 1201 if (memcmp(&data[i], "00:00:00:00:00:00", bd_addr_string_len)) { 1202 i++; 1203 continue; 1204 } 1205 // set real address 1206 (void)memcpy(&data[i], bd_addr_to_str(hci_stack->local_bd_addr), 1207 bd_addr_string_len); 1208 i += bd_addr_string_len; 1209 } 1210 } 1211 #endif 1212 1213 // assumption: hci_can_send_command_packet_now() == true 1214 static void hci_initializing_run(void){ 1215 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1216 switch (hci_stack->substate){ 1217 case HCI_INIT_SEND_RESET: 1218 hci_state_reset(); 1219 1220 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1221 // prepare reset if command complete not received in 100ms 1222 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1223 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1224 btstack_run_loop_add_timer(&hci_stack->timeout); 1225 #endif 1226 // send command 1227 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1228 hci_send_cmd(&hci_reset); 1229 break; 1230 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1231 hci_send_cmd(&hci_read_local_version_information); 1232 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1233 break; 1234 case HCI_INIT_SEND_READ_LOCAL_NAME: 1235 hci_send_cmd(&hci_read_local_name); 1236 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1237 break; 1238 1239 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1240 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1241 hci_state_reset(); 1242 // prepare reset if command complete not received in 100ms 1243 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1244 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1245 btstack_run_loop_add_timer(&hci_stack->timeout); 1246 // send command 1247 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1248 hci_send_cmd(&hci_reset); 1249 break; 1250 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1251 hci_state_reset(); 1252 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1253 hci_send_cmd(&hci_reset); 1254 break; 1255 case HCI_INIT_SEND_BAUD_CHANGE: { 1256 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1257 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1258 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1259 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1260 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1261 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1262 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1263 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1264 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1265 btstack_run_loop_add_timer(&hci_stack->timeout); 1266 } 1267 break; 1268 } 1269 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1270 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1271 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1272 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1273 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1274 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1275 break; 1276 } 1277 case HCI_INIT_CUSTOM_INIT: 1278 // Custom initialization 1279 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1280 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1281 int send_cmd = 0; 1282 switch (hci_stack->chipset_result){ 1283 case BTSTACK_CHIPSET_VALID_COMMAND: 1284 send_cmd = 1; 1285 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1286 break; 1287 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1288 send_cmd = 1; 1289 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1290 log_info("CSR Warm Boot"); 1291 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1292 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1293 btstack_run_loop_add_timer(&hci_stack->timeout); 1294 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1295 && hci_stack->config 1296 && hci_stack->chipset 1297 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1298 && hci_stack->hci_transport->set_baudrate 1299 && hci_transport_uart_get_main_baud_rate()){ 1300 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1301 } else { 1302 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1303 } 1304 break; 1305 default: 1306 break; 1307 } 1308 1309 if (send_cmd){ 1310 int size = 3 + hci_stack->hci_packet_buffer[2]; 1311 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1312 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1313 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1314 break; 1315 } 1316 log_info("Init script done"); 1317 1318 // Init script download on Broadcom chipsets causes: 1319 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1320 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1321 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1322 1323 // - baud rate to reset, restore UART baud rate if needed 1324 int need_baud_change = hci_stack->config 1325 && hci_stack->chipset 1326 && hci_stack->chipset->set_baudrate_command 1327 && hci_stack->hci_transport->set_baudrate 1328 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1329 if (need_baud_change) { 1330 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1331 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1332 hci_stack->hci_transport->set_baudrate(baud_rate); 1333 } 1334 1335 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1336 // -> Work around: wait a few milliseconds here. 1337 log_info("BCM delay after init script"); 1338 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1339 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1340 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1341 btstack_run_loop_add_timer(&hci_stack->timeout); 1342 break; 1343 } 1344 } 1345 // otherwise continue 1346 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1347 hci_send_cmd(&hci_read_local_supported_commands); 1348 break; 1349 case HCI_INIT_SET_BD_ADDR: 1350 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1351 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1352 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1353 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1354 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1355 break; 1356 #endif 1357 1358 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1359 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1360 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1361 hci_send_cmd(&hci_read_local_supported_commands); 1362 break; 1363 case HCI_INIT_READ_BD_ADDR: 1364 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1365 hci_send_cmd(&hci_read_bd_addr); 1366 break; 1367 case HCI_INIT_READ_BUFFER_SIZE: 1368 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1369 hci_send_cmd(&hci_read_buffer_size); 1370 break; 1371 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1372 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1373 hci_send_cmd(&hci_read_local_supported_features); 1374 break; 1375 1376 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1377 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1378 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1379 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1380 break; 1381 case HCI_INIT_HOST_BUFFER_SIZE: 1382 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1383 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1384 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1385 break; 1386 #endif 1387 1388 case HCI_INIT_SET_EVENT_MASK: 1389 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1390 if (hci_le_supported()){ 1391 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1392 } else { 1393 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1394 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1395 } 1396 break; 1397 1398 #ifdef ENABLE_CLASSIC 1399 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1400 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1401 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1402 break; 1403 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1404 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1405 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1406 break; 1407 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1408 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1409 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1410 break; 1411 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1412 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1413 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1414 break; 1415 case HCI_INIT_WRITE_LOCAL_NAME: { 1416 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1417 hci_reserve_packet_buffer(); 1418 uint8_t * packet = hci_stack->hci_packet_buffer; 1419 // construct HCI Command and send 1420 uint16_t opcode = hci_write_local_name.opcode; 1421 hci_stack->last_cmd_opcode = opcode; 1422 packet[0] = opcode & 0xff; 1423 packet[1] = opcode >> 8; 1424 packet[2] = DEVICE_NAME_LEN; 1425 memset(&packet[3], 0, DEVICE_NAME_LEN); 1426 (void)memcpy(&packet[3], hci_stack->local_name, 1427 strlen(hci_stack->local_name)); 1428 // expand '00:00:00:00:00:00' in name with bd_addr 1429 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1430 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1431 break; 1432 } 1433 case HCI_INIT_WRITE_EIR_DATA: { 1434 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1435 hci_reserve_packet_buffer(); 1436 uint8_t * packet = hci_stack->hci_packet_buffer; 1437 // construct HCI Command and send 1438 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1439 hci_stack->last_cmd_opcode = opcode; 1440 packet[0] = opcode & 0xff; 1441 packet[1] = opcode >> 8; 1442 packet[2] = 1 + 240; 1443 packet[3] = 0; // FEC not required 1444 if (hci_stack->eir_data){ 1445 (void)memcpy(&packet[4], hci_stack->eir_data, 240); 1446 } else { 1447 memset(&packet[4], 0, 240); 1448 int name_len = strlen(hci_stack->local_name); 1449 packet[4] = name_len + 1; 1450 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1451 (void)memcpy(&packet[6], hci_stack->local_name, name_len); 1452 } 1453 // expand '00:00:00:00:00:00' in name with bd_addr 1454 hci_replace_bd_addr_placeholder(&packet[4], 240); 1455 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1456 break; 1457 } 1458 case HCI_INIT_WRITE_INQUIRY_MODE: 1459 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1460 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1461 break; 1462 case HCI_INIT_WRITE_SCAN_ENABLE: 1463 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1464 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1465 break; 1466 // only sent if ENABLE_SCO_OVER_HCI is defined 1467 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1468 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1469 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1470 break; 1471 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1472 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1473 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1474 break; 1475 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1476 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1477 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1478 log_info("BCM: Route SCO data via HCI transport"); 1479 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1480 break; 1481 1482 #endif 1483 #ifdef ENABLE_BLE 1484 // LE INIT 1485 case HCI_INIT_LE_READ_BUFFER_SIZE: 1486 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1487 hci_send_cmd(&hci_le_read_buffer_size); 1488 break; 1489 case HCI_INIT_LE_SET_EVENT_MASK: 1490 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1491 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1492 break; 1493 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1494 // LE Supported Host = 1, Simultaneous Host = 0 1495 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1496 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1497 break; 1498 #endif 1499 1500 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1501 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1502 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1503 hci_send_cmd(&hci_le_read_maximum_data_length); 1504 break; 1505 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1506 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1507 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1508 break; 1509 #endif 1510 1511 #ifdef ENABLE_LE_CENTRAL 1512 case HCI_INIT_READ_WHITE_LIST_SIZE: 1513 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1514 hci_send_cmd(&hci_le_read_white_list_size); 1515 break; 1516 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1517 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1518 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1519 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); 1520 break; 1521 #endif 1522 default: 1523 return; 1524 } 1525 } 1526 1527 static void hci_init_done(void){ 1528 // done. tell the app 1529 log_info("hci_init_done -> HCI_STATE_WORKING"); 1530 hci_stack->state = HCI_STATE_WORKING; 1531 hci_emit_state(); 1532 hci_run(); 1533 } 1534 1535 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1536 1537 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1538 1539 uint8_t command_completed = 0; 1540 1541 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1542 uint16_t opcode = little_endian_read_16(packet,3); 1543 if (opcode == hci_stack->last_cmd_opcode){ 1544 command_completed = 1; 1545 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1546 } else { 1547 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1548 } 1549 } 1550 1551 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1552 uint8_t status = packet[2]; 1553 uint16_t opcode = little_endian_read_16(packet,4); 1554 if (opcode == hci_stack->last_cmd_opcode){ 1555 if (status){ 1556 command_completed = 1; 1557 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1558 } else { 1559 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1560 } 1561 } else { 1562 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1563 } 1564 } 1565 1566 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1567 1568 // Vendor == CSR 1569 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1570 // TODO: track actual command 1571 command_completed = 1; 1572 } 1573 1574 // Vendor == Toshiba 1575 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1576 // TODO: track actual command 1577 command_completed = 1; 1578 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1579 hci_stack->num_cmd_packets = 1; 1580 } 1581 1582 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1583 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1584 // 1585 // HCI Reset 1586 // Timeout 100 ms 1587 // HCI Reset 1588 // Command Complete Reset 1589 // HCI Read Local Version Information 1590 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1591 // hang... 1592 // 1593 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1594 if (!command_completed 1595 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1596 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1597 1598 uint16_t opcode = little_endian_read_16(packet,3); 1599 if (opcode == hci_reset.opcode){ 1600 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1601 return; 1602 } 1603 } 1604 1605 // CSR & H5 1606 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1607 if (!command_completed 1608 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1609 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1610 1611 uint16_t opcode = little_endian_read_16(packet,3); 1612 if (opcode == hci_reset.opcode){ 1613 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1614 return; 1615 } 1616 } 1617 1618 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1619 // fix: Correct substate and behave as command below 1620 if (command_completed){ 1621 switch (hci_stack->substate){ 1622 case HCI_INIT_SEND_RESET: 1623 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1624 break; 1625 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1626 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1627 break; 1628 default: 1629 break; 1630 } 1631 } 1632 1633 #endif 1634 1635 if (!command_completed) return; 1636 1637 int need_baud_change = 0; 1638 int need_addr_change = 0; 1639 1640 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1641 need_baud_change = hci_stack->config 1642 && hci_stack->chipset 1643 && hci_stack->chipset->set_baudrate_command 1644 && hci_stack->hci_transport->set_baudrate 1645 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1646 1647 need_addr_change = hci_stack->custom_bd_addr_set 1648 && hci_stack->chipset 1649 && hci_stack->chipset->set_bd_addr_command; 1650 #endif 1651 1652 switch(hci_stack->substate){ 1653 1654 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1655 case HCI_INIT_SEND_RESET: 1656 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1657 // fix: just correct substate and behave as command below 1658 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1659 btstack_run_loop_remove_timer(&hci_stack->timeout); 1660 break; 1661 case HCI_INIT_W4_SEND_RESET: 1662 btstack_run_loop_remove_timer(&hci_stack->timeout); 1663 break; 1664 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1665 log_info("Received local name, need baud change %d", need_baud_change); 1666 if (need_baud_change){ 1667 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1668 return; 1669 } 1670 // skip baud change 1671 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1672 return; 1673 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1674 // for STLC2500D, baud rate change already happened. 1675 // for others, baud rate gets changed now 1676 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1677 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1678 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1679 hci_stack->hci_transport->set_baudrate(baud_rate); 1680 } 1681 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1682 return; 1683 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1684 btstack_run_loop_remove_timer(&hci_stack->timeout); 1685 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1686 return; 1687 case HCI_INIT_W4_CUSTOM_INIT: 1688 // repeat custom init 1689 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1690 return; 1691 #else 1692 case HCI_INIT_W4_SEND_RESET: 1693 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1694 return ; 1695 #endif 1696 1697 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1698 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1699 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1700 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1701 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1702 return; 1703 } 1704 if (need_addr_change){ 1705 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1706 return; 1707 } 1708 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1709 return; 1710 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1711 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1712 if (need_baud_change){ 1713 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1714 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1715 hci_stack->hci_transport->set_baudrate(baud_rate); 1716 } 1717 if (need_addr_change){ 1718 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1719 return; 1720 } 1721 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1722 return; 1723 case HCI_INIT_W4_SET_BD_ADDR: 1724 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1725 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1726 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1727 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1728 return; 1729 } 1730 // skipping st warm boot 1731 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1732 return; 1733 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1734 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1735 return; 1736 #endif 1737 case HCI_INIT_W4_READ_BD_ADDR: 1738 // only read buffer size if supported 1739 if (hci_stack->local_supported_commands[0] & 0x01) { 1740 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1741 return; 1742 } 1743 // skipping read buffer size 1744 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1745 return; 1746 case HCI_INIT_W4_SET_EVENT_MASK: 1747 // skip Classic init commands for LE only chipsets 1748 if (!hci_classic_supported()){ 1749 #ifdef ENABLE_BLE 1750 if (hci_le_supported()){ 1751 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1752 return; 1753 } 1754 #endif 1755 log_error("Neither BR/EDR nor LE supported"); 1756 hci_init_done(); 1757 return; 1758 } 1759 if (!gap_ssp_supported()){ 1760 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1761 return; 1762 } 1763 break; 1764 #ifdef ENABLE_BLE 1765 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1766 // skip write le host if not supported (e.g. on LE only EM9301) 1767 if (hci_stack->local_supported_commands[0] & 0x02) break; 1768 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1769 return; 1770 1771 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1772 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1773 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1774 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1775 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1776 return; 1777 } 1778 // explicit fall through to reduce repetitions 1779 1780 #ifdef ENABLE_LE_CENTRAL 1781 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1782 #else 1783 hci_init_done(); 1784 #endif 1785 return; 1786 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1787 1788 #endif /* ENABLE_BLE */ 1789 1790 #ifdef ENABLE_SCO_OVER_HCI 1791 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1792 // skip write synchronous flow control if not supported 1793 if (hci_stack->local_supported_commands[0] & 0x04) break; 1794 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1795 // explicit fall through to reduce repetitions 1796 1797 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1798 // skip write default erroneous data reporting if not supported 1799 if (hci_stack->local_supported_commands[0] & 0x08) break; 1800 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1801 // explicit fall through to reduce repetitions 1802 1803 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1804 // skip bcm set sco pcm config on non-Broadcom chipsets 1805 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1806 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1807 // explicit fall through to reduce repetitions 1808 1809 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1810 if (!hci_le_supported()){ 1811 // SKIP LE init for Classic only configuration 1812 hci_init_done(); 1813 return; 1814 } 1815 break; 1816 1817 #else /* !ENABLE_SCO_OVER_HCI */ 1818 1819 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1820 #ifdef ENABLE_BLE 1821 if (hci_le_supported()){ 1822 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1823 return; 1824 } 1825 #endif 1826 // SKIP LE init for Classic only configuration 1827 hci_init_done(); 1828 return; 1829 #endif /* ENABLE_SCO_OVER_HCI */ 1830 1831 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1832 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1833 // Response to command before init done state -> init done 1834 case (HCI_INIT_DONE-1): 1835 hci_init_done(); 1836 return; 1837 #endif 1838 1839 default: 1840 break; 1841 } 1842 hci_initializing_next_state(); 1843 } 1844 1845 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1846 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1847 bd_addr_t bd_address; 1848 (void)memcpy(&bd_address, conn->address, 6); 1849 1850 #ifdef ENABLE_CLASSIC 1851 // cache needed data 1852 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1853 #endif 1854 1855 // connection failed, remove entry 1856 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1857 btstack_memory_hci_connection_free( conn ); 1858 1859 #ifdef ENABLE_CLASSIC 1860 // notify client if dedicated bonding 1861 if (notify_dedicated_bonding_failed){ 1862 log_info("hci notify_dedicated_bonding_failed"); 1863 hci_emit_dedicated_bonding_result(bd_address, status); 1864 } 1865 1866 // if authentication error, also delete link key 1867 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1868 gap_drop_link_key_for_bd_addr(bd_address); 1869 } 1870 #endif 1871 } 1872 1873 static void event_handler(uint8_t *packet, int size){ 1874 1875 uint16_t event_length = packet[1]; 1876 1877 // assert packet is complete 1878 if (size != (event_length + 2)){ 1879 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1880 return; 1881 } 1882 1883 bd_addr_t addr; 1884 bd_addr_type_t addr_type; 1885 hci_con_handle_t handle; 1886 hci_connection_t * conn; 1887 int i; 1888 int create_connection_cmd; 1889 1890 #ifdef ENABLE_CLASSIC 1891 uint8_t link_type; 1892 #endif 1893 1894 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1895 1896 switch (hci_event_packet_get_type(packet)) { 1897 1898 case HCI_EVENT_COMMAND_COMPLETE: 1899 // get num cmd packets - limit to 1 to reduce complexity 1900 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1901 1902 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1903 if (packet[5]) break; 1904 // terminate, name 248 chars 1905 packet[6+248] = 0; 1906 log_info("local name: %s", &packet[6]); 1907 } 1908 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1909 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1910 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1911 uint16_t acl_len = little_endian_read_16(packet, 6); 1912 uint16_t sco_len = packet[8]; 1913 1914 // determine usable ACL/SCO payload size 1915 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1916 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1917 1918 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1919 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1920 1921 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1922 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1923 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1924 } 1925 } 1926 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_rssi)){ 1927 if (packet[5] == 0){ 1928 uint8_t event[5]; 1929 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 1930 event[1] = 3; 1931 (void)memcpy(&event[2], &packet[6], 3); 1932 hci_emit_event(event, sizeof(event), 1); 1933 } 1934 } 1935 #ifdef ENABLE_BLE 1936 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1937 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1938 hci_stack->le_acl_packets_total_num = packet[8]; 1939 // determine usable ACL payload size 1940 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1941 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1942 } 1943 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1944 } 1945 #endif 1946 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1947 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1948 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1949 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1950 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); 1951 } 1952 #endif 1953 #ifdef ENABLE_LE_CENTRAL 1954 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1955 hci_stack->le_whitelist_capacity = packet[6]; 1956 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1957 } 1958 #endif 1959 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1960 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1961 hci_stack->local_bd_addr); 1962 log_info("Local Address, Status: 0x%02x: Addr: %s", 1963 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1964 #ifdef ENABLE_CLASSIC 1965 if (hci_stack->link_key_db){ 1966 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1967 } 1968 #endif 1969 } 1970 #ifdef ENABLE_CLASSIC 1971 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1972 hci_emit_discoverable_enabled(hci_stack->discoverable); 1973 } 1974 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1975 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1976 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1977 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1978 hci_emit_event(event, sizeof(event), 1); 1979 } 1980 } 1981 #endif 1982 1983 // Note: HCI init checks 1984 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1985 (void)memcpy(hci_stack->local_supported_features, 1986 &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1987 8); 1988 1989 #ifdef ENABLE_CLASSIC 1990 // determine usable ACL packet types based on host buffer size and supported features 1991 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1992 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1993 #endif 1994 // Classic/LE 1995 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1996 } 1997 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1998 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1999 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 2000 uint16_t manufacturer = little_endian_read_16(packet, 10); 2001 // map Cypress to Broadcom 2002 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2003 log_info("Treat Cypress as Broadcom"); 2004 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2005 little_endian_store_16(packet, 10, manufacturer); 2006 } 2007 hci_stack->manufacturer = manufacturer; 2008 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 2009 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 2010 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2011 } 2012 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 2013 hci_stack->local_supported_commands[0] = 2014 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2015 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2016 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2017 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2018 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2019 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2020 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1); // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2021 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 2022 } 2023 #ifdef ENABLE_CLASSIC 2024 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 2025 if (packet[5] == 0){ 2026 hci_stack->synchronous_flow_control_enabled = 1; 2027 } 2028 } 2029 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_encryption_key_size)){ 2030 uint8_t status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2031 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2032 conn = hci_connection_for_handle(handle); 2033 if (!conn) break; 2034 if (status == 0){ 2035 uint8_t key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2036 log_info("Handle %x04x key Size: %u", handle, key_size); 2037 conn->encryption_key_size = key_size; 2038 } else { 2039 log_info("Read Encryption Key Size failed -> assuming insecure connection with key size of 1"); 2040 conn->encryption_key_size = 1; 2041 } 2042 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2043 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2044 } 2045 #endif 2046 break; 2047 2048 case HCI_EVENT_COMMAND_STATUS: 2049 // get num cmd packets - limit to 1 to reduce complexity 2050 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2051 2052 // check command status to detected failed outgoing connections 2053 create_connection_cmd = 0; 2054 #ifdef ENABLE_CLASSIC 2055 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2056 create_connection_cmd = 1; 2057 } 2058 #endif 2059 #ifdef ENABLE_LE_CENTRAL 2060 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2061 create_connection_cmd = 1; 2062 } 2063 #endif 2064 if (create_connection_cmd) { 2065 uint8_t status = hci_event_command_status_get_status(packet); 2066 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2067 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); 2068 2069 // reset outgoing address info 2070 memset(hci_stack->outgoing_addr, 0, 6); 2071 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2072 2073 // error => outgoing connection failed 2074 if ((conn != NULL) && (status != 0)){ 2075 hci_handle_connection_failed(conn, status); 2076 } 2077 } 2078 break; 2079 2080 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2081 int offset = 3; 2082 for (i=0; i<packet[2];i++){ 2083 handle = little_endian_read_16(packet, offset) & 0x0fff; 2084 offset += 2; 2085 uint16_t num_packets = little_endian_read_16(packet, offset); 2086 offset += 2; 2087 2088 conn = hci_connection_for_handle(handle); 2089 if (!conn){ 2090 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2091 continue; 2092 } 2093 2094 if (conn->num_packets_sent >= num_packets){ 2095 conn->num_packets_sent -= num_packets; 2096 } else { 2097 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2098 conn->num_packets_sent = 0; 2099 } 2100 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2101 2102 #ifdef ENABLE_CLASSIC 2103 // For SCO, we do the can_send_now_check here 2104 hci_notify_if_sco_can_send_now(); 2105 #endif 2106 } 2107 break; 2108 } 2109 2110 #ifdef ENABLE_CLASSIC 2111 case HCI_EVENT_INQUIRY_COMPLETE: 2112 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2113 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2114 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2115 hci_emit_event(event, sizeof(event), 1); 2116 } 2117 break; 2118 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2119 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2120 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2121 } 2122 break; 2123 case HCI_EVENT_CONNECTION_REQUEST: 2124 reverse_bd_addr(&packet[2], addr); 2125 if (hci_stack->gap_classic_accept_callback != NULL){ 2126 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2127 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2128 bd_addr_copy(hci_stack->decline_addr, addr); 2129 break; 2130 } 2131 } 2132 2133 // TODO: eval COD 8-10 2134 link_type = packet[11]; 2135 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2136 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2137 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2138 if (!conn) { 2139 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2140 } 2141 if (!conn) { 2142 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2143 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2144 bd_addr_copy(hci_stack->decline_addr, addr); 2145 break; 2146 } 2147 conn->role = HCI_ROLE_SLAVE; 2148 conn->state = RECEIVED_CONNECTION_REQUEST; 2149 // store info about eSCO 2150 if (link_type == 0x02){ 2151 conn->remote_supported_feature_eSCO = 1; 2152 } 2153 hci_run(); 2154 break; 2155 2156 case HCI_EVENT_CONNECTION_COMPLETE: 2157 // Connection management 2158 reverse_bd_addr(&packet[5], addr); 2159 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2160 addr_type = BD_ADDR_TYPE_ACL; 2161 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2162 if (conn) { 2163 if (!packet[2]){ 2164 conn->state = OPEN; 2165 conn->con_handle = little_endian_read_16(packet, 3); 2166 2167 // queue get remote feature 2168 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2169 2170 // queue set supervision timeout if we're master 2171 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2172 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2173 } 2174 2175 // restart timer 2176 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2177 btstack_run_loop_add_timer(&conn->timeout); 2178 2179 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2180 2181 hci_emit_nr_connections_changed(); 2182 } else { 2183 // connection failed 2184 hci_handle_connection_failed(conn, packet[2]); 2185 } 2186 } 2187 break; 2188 2189 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2190 reverse_bd_addr(&packet[5], addr); 2191 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2192 if (packet[2]){ 2193 // connection failed 2194 break; 2195 } 2196 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2197 if (!conn) { 2198 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2199 } 2200 if (!conn) { 2201 break; 2202 } 2203 conn->state = OPEN; 2204 conn->con_handle = little_endian_read_16(packet, 3); 2205 2206 #ifdef ENABLE_SCO_OVER_HCI 2207 // update SCO 2208 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2209 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2210 } 2211 // trigger can send now 2212 if (hci_have_usb_transport()){ 2213 hci_stack->sco_can_send_now = 1; 2214 } 2215 #endif 2216 break; 2217 2218 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2219 handle = little_endian_read_16(packet, 3); 2220 conn = hci_connection_for_handle(handle); 2221 if (!conn) break; 2222 if (!packet[2]){ 2223 uint8_t * features = &packet[5]; 2224 if (features[6] & (1 << 3)){ 2225 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2226 } 2227 if (features[3] & (1<<7)){ 2228 conn->remote_supported_feature_eSCO = 1; 2229 } 2230 } 2231 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2232 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2233 if (conn->bonding_flags & BONDING_DEDICATED){ 2234 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2235 } 2236 break; 2237 2238 case HCI_EVENT_LINK_KEY_REQUEST: 2239 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2240 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2241 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2242 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2243 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2244 hci_run(); 2245 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2246 return; 2247 2248 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2249 reverse_bd_addr(&packet[2], addr); 2250 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2251 if (!conn) break; 2252 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2253 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2254 // Change Connection Encryption keeps link key type 2255 if (link_key_type != CHANGED_COMBINATION_KEY){ 2256 conn->link_key_type = link_key_type; 2257 } 2258 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2259 // still forward event to allow dismiss of pairing dialog 2260 break; 2261 } 2262 2263 case HCI_EVENT_PIN_CODE_REQUEST: 2264 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2265 // non-bondable mode: pin code negative reply will be sent 2266 if (!hci_stack->bondable){ 2267 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2268 hci_run(); 2269 return; 2270 } 2271 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2272 if (!hci_stack->link_key_db) break; 2273 hci_event_pin_code_request_get_bd_addr(packet, addr); 2274 hci_stack->link_key_db->delete_link_key(addr); 2275 break; 2276 2277 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2278 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2279 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2280 break; 2281 2282 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2283 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2284 if (!hci_stack->ssp_auto_accept) break; 2285 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2286 break; 2287 2288 case HCI_EVENT_USER_PASSKEY_REQUEST: 2289 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2290 if (!hci_stack->ssp_auto_accept) break; 2291 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2292 break; 2293 case HCI_EVENT_MODE_CHANGE: 2294 handle = hci_event_mode_change_get_handle(packet); 2295 conn = hci_connection_for_handle(handle); 2296 if (!conn) break; 2297 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2298 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2299 break; 2300 #endif 2301 2302 case HCI_EVENT_ENCRYPTION_CHANGE: 2303 handle = little_endian_read_16(packet, 3); 2304 conn = hci_connection_for_handle(handle); 2305 if (!conn) break; 2306 if (packet[2] == 0) { 2307 if (packet[5]){ 2308 if (hci_is_le_connection(conn)){ 2309 // For LE, we accept connection as encrypted 2310 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2311 } 2312 #ifdef ENABLE_CLASSIC 2313 else { 2314 // For Classic, we need to validate encryption key size first 2315 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2316 } 2317 #endif 2318 } else { 2319 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2320 } 2321 } 2322 2323 break; 2324 2325 #ifdef ENABLE_CLASSIC 2326 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2327 handle = little_endian_read_16(packet, 3); 2328 conn = hci_connection_for_handle(handle); 2329 if (!conn) break; 2330 2331 // dedicated bonding: send result and disconnect 2332 if (conn->bonding_flags & BONDING_DEDICATED){ 2333 conn->bonding_flags &= ~BONDING_DEDICATED; 2334 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2335 conn->bonding_status = packet[2]; 2336 break; 2337 } 2338 2339 if ((packet[2] == 0) && (gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)){ 2340 // link key sufficient for requested security 2341 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2342 break; 2343 } 2344 // not enough 2345 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2346 break; 2347 #endif 2348 2349 // HCI_EVENT_DISCONNECTION_COMPLETE 2350 // has been split, to first notify stack before shutting connection down 2351 // see end of function, too. 2352 case HCI_EVENT_DISCONNECTION_COMPLETE: 2353 if (packet[2]) break; // status != 0 2354 handle = little_endian_read_16(packet, 3); 2355 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2356 if (hci_stack->acl_fragmentation_total_size > 0) { 2357 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2358 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2359 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2360 hci_stack->acl_fragmentation_total_size = 0; 2361 hci_stack->acl_fragmentation_pos = 0; 2362 if (release_buffer){ 2363 hci_release_packet_buffer(); 2364 } 2365 } 2366 } 2367 2368 // re-enable advertisements for le connections if active 2369 conn = hci_connection_for_handle(handle); 2370 if (!conn) break; 2371 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2372 #ifdef ENABLE_BLE 2373 #ifdef ENABLE_LE_PERIPHERAL 2374 if (hci_is_le_connection(conn)){ 2375 hci_reenable_advertisements_if_needed(); 2376 } 2377 #endif 2378 #endif 2379 break; 2380 2381 case HCI_EVENT_HARDWARE_ERROR: 2382 log_error("Hardware Error: 0x%02x", packet[2]); 2383 if (hci_stack->hardware_error_callback){ 2384 (*hci_stack->hardware_error_callback)(packet[2]); 2385 } else { 2386 // if no special requests, just reboot stack 2387 hci_power_control_off(); 2388 hci_power_control_on(); 2389 } 2390 break; 2391 2392 #ifdef ENABLE_CLASSIC 2393 case HCI_EVENT_ROLE_CHANGE: 2394 if (packet[2]) break; // status != 0 2395 reverse_bd_addr(&packet[3], addr); 2396 addr_type = BD_ADDR_TYPE_ACL; 2397 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2398 if (!conn) break; 2399 conn->role = packet[9]; 2400 break; 2401 #endif 2402 2403 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2404 // release packet buffer only for asynchronous transport and if there are not further fragements 2405 if (hci_transport_synchronous()) { 2406 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2407 return; // instead of break: to avoid re-entering hci_run() 2408 } 2409 hci_stack->acl_fragmentation_tx_active = 0; 2410 if (hci_stack->acl_fragmentation_total_size) break; 2411 hci_release_packet_buffer(); 2412 2413 // L2CAP receives this event via the hci_emit_event below 2414 2415 #ifdef ENABLE_CLASSIC 2416 // For SCO, we do the can_send_now_check here 2417 hci_notify_if_sco_can_send_now(); 2418 #endif 2419 break; 2420 2421 #ifdef ENABLE_CLASSIC 2422 case HCI_EVENT_SCO_CAN_SEND_NOW: 2423 // For SCO, we do the can_send_now_check here 2424 hci_stack->sco_can_send_now = 1; 2425 hci_notify_if_sco_can_send_now(); 2426 return; 2427 2428 // explode inquriy results for easier consumption 2429 case HCI_EVENT_INQUIRY_RESULT: 2430 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2431 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2432 gap_inquiry_explode(packet); 2433 break; 2434 #endif 2435 2436 #ifdef ENABLE_BLE 2437 case HCI_EVENT_LE_META: 2438 switch (packet[2]){ 2439 #ifdef ENABLE_LE_CENTRAL 2440 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2441 // log_info("advertising report received"); 2442 if (!hci_stack->le_scanning_enabled) break; 2443 le_handle_advertisement_report(packet, size); 2444 break; 2445 #endif 2446 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2447 // Connection management 2448 reverse_bd_addr(&packet[8], addr); 2449 addr_type = (bd_addr_type_t)packet[7]; 2450 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2451 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2452 2453 #ifdef ENABLE_LE_CENTRAL 2454 // if auto-connect, remove from whitelist in both roles 2455 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2456 hci_remove_from_whitelist(addr_type, addr); 2457 } 2458 // handle error: error is reported only to the initiator -> outgoing connection 2459 if (packet[3]){ 2460 2461 // handle cancelled outgoing connection 2462 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2463 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2464 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2465 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2466 conn = gap_get_outgoing_connection(); 2467 } 2468 2469 // outgoing connection establishment is done 2470 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2471 // remove entry 2472 if (conn){ 2473 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2474 btstack_memory_hci_connection_free( conn ); 2475 } 2476 break; 2477 } 2478 #endif 2479 // on success, both hosts receive connection complete event 2480 if (packet[6] == HCI_ROLE_MASTER){ 2481 #ifdef ENABLE_LE_CENTRAL 2482 // if we're master, it was an outgoing connection and we're done with it 2483 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2484 #endif 2485 } else { 2486 #ifdef ENABLE_LE_PERIPHERAL 2487 // if we're slave, it was an incoming connection, advertisements have stopped 2488 hci_stack->le_advertisements_active = 0; 2489 #endif 2490 } 2491 // LE connections are auto-accepted, so just create a connection if there isn't one already 2492 if (!conn){ 2493 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2494 } 2495 // no memory, sorry. 2496 if (!conn){ 2497 break; 2498 } 2499 2500 conn->state = OPEN; 2501 conn->role = packet[6]; 2502 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2503 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2504 2505 #ifdef ENABLE_LE_PERIPHERAL 2506 if (packet[6] == HCI_ROLE_SLAVE){ 2507 hci_reenable_advertisements_if_needed(); 2508 } 2509 #endif 2510 2511 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2512 2513 // restart timer 2514 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2515 // btstack_run_loop_add_timer(&conn->timeout); 2516 2517 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2518 2519 hci_emit_nr_connections_changed(); 2520 break; 2521 2522 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2523 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2524 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2525 conn = hci_connection_for_handle(handle); 2526 if (!conn) break; 2527 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2528 break; 2529 2530 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2531 // connection 2532 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2533 conn = hci_connection_for_handle(handle); 2534 if (conn) { 2535 // read arguments 2536 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2537 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2538 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2539 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2540 2541 // validate against current connection parameter range 2542 le_connection_parameter_range_t existing_range; 2543 gap_get_connection_parameter_range(&existing_range); 2544 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2545 if (update_parameter){ 2546 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2547 conn->le_conn_interval_min = le_conn_interval_min; 2548 conn->le_conn_interval_max = le_conn_interval_max; 2549 conn->le_conn_latency = le_conn_latency; 2550 conn->le_supervision_timeout = le_supervision_timeout; 2551 } else { 2552 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2553 } 2554 } 2555 break; 2556 default: 2557 break; 2558 } 2559 break; 2560 #endif 2561 case HCI_EVENT_VENDOR_SPECIFIC: 2562 // Vendor specific commands often create vendor specific event instead of num completed packets 2563 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2564 switch (hci_stack->manufacturer){ 2565 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2566 hci_stack->num_cmd_packets = 1; 2567 break; 2568 default: 2569 break; 2570 } 2571 break; 2572 default: 2573 break; 2574 } 2575 2576 // handle BT initialization 2577 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2578 hci_initializing_event_handler(packet, size); 2579 } 2580 2581 // help with BT sleep 2582 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2583 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2584 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2585 hci_initializing_next_state(); 2586 } 2587 2588 // notify upper stack 2589 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2590 2591 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2592 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2593 if (!packet[2]){ 2594 handle = little_endian_read_16(packet, 3); 2595 hci_connection_t * aConn = hci_connection_for_handle(handle); 2596 if (aConn) { 2597 uint8_t status = aConn->bonding_status; 2598 uint16_t flags = aConn->bonding_flags; 2599 bd_addr_t bd_address; 2600 (void)memcpy(&bd_address, aConn->address, 6); 2601 hci_shutdown_connection(aConn); 2602 // connection struct is gone, don't access anymore 2603 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2604 hci_emit_dedicated_bonding_result(bd_address, status); 2605 } 2606 } 2607 } 2608 } 2609 2610 // execute main loop 2611 hci_run(); 2612 } 2613 2614 #ifdef ENABLE_CLASSIC 2615 2616 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2617 static void sco_schedule_tx(hci_connection_t * conn); 2618 2619 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2620 log_debug("SCO TX Timeout"); 2621 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2622 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2623 if (!conn) return; 2624 2625 // trigger send 2626 conn->sco_tx_ready = 1; 2627 // extra packet if CVSD but SCO buffer is too short 2628 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2629 conn->sco_tx_ready++; 2630 } 2631 hci_notify_if_sco_can_send_now(); 2632 } 2633 2634 2635 #define SCO_TX_AFTER_RX_MS (6) 2636 2637 static void sco_schedule_tx(hci_connection_t * conn){ 2638 2639 uint32_t now = btstack_run_loop_get_time_ms(); 2640 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2641 int time_delta_ms = sco_tx_ms - now; 2642 2643 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2644 2645 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2646 btstack_run_loop_set_timer(timer, time_delta_ms); 2647 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2648 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2649 btstack_run_loop_add_timer(timer); 2650 } 2651 2652 static void sco_handler(uint8_t * packet, uint16_t size){ 2653 // lookup connection struct 2654 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2655 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2656 if (!conn) return; 2657 2658 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2659 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2660 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2661 packet[2] = 0x3c; 2662 memmove(&packet[3], &packet[23], 63); 2663 size = 63; 2664 } 2665 } 2666 2667 if (hci_have_usb_transport()){ 2668 // Nothing to do 2669 } else { 2670 // 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); 2671 if (hci_stack->synchronous_flow_control_enabled == 0){ 2672 uint32_t now = btstack_run_loop_get_time_ms(); 2673 2674 if (!conn->sco_rx_valid){ 2675 // ignore first 10 packets 2676 conn->sco_rx_count++; 2677 // log_debug("sco rx count %u", conn->sco_rx_count); 2678 if (conn->sco_rx_count == 10) { 2679 // use first timestamp as is and pretent it just started 2680 conn->sco_rx_ms = now; 2681 conn->sco_rx_valid = 1; 2682 conn->sco_rx_count = 0; 2683 sco_schedule_tx(conn); 2684 } 2685 } else { 2686 // track expected arrival timme 2687 conn->sco_rx_count++; 2688 conn->sco_rx_ms += 7; 2689 int delta = (int32_t) (now - conn->sco_rx_ms); 2690 if (delta > 0){ 2691 conn->sco_rx_ms++; 2692 } 2693 // log_debug("sco rx %u", conn->sco_rx_ms); 2694 sco_schedule_tx(conn); 2695 } 2696 } 2697 } 2698 // deliver to app 2699 if (hci_stack->sco_packet_handler) { 2700 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2701 } 2702 2703 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2704 conn->num_packets_completed++; 2705 hci_stack->host_completed_packets = 1; 2706 hci_run(); 2707 #endif 2708 } 2709 #endif 2710 2711 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2712 hci_dump_packet(packet_type, 1, packet, size); 2713 switch (packet_type) { 2714 case HCI_EVENT_PACKET: 2715 event_handler(packet, size); 2716 break; 2717 case HCI_ACL_DATA_PACKET: 2718 acl_handler(packet, size); 2719 break; 2720 #ifdef ENABLE_CLASSIC 2721 case HCI_SCO_DATA_PACKET: 2722 sco_handler(packet, size); 2723 break; 2724 #endif 2725 default: 2726 break; 2727 } 2728 } 2729 2730 /** 2731 * @brief Add event packet handler. 2732 */ 2733 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2734 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2735 } 2736 2737 2738 /** Register HCI packet handlers */ 2739 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2740 hci_stack->acl_packet_handler = handler; 2741 } 2742 2743 #ifdef ENABLE_CLASSIC 2744 /** 2745 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2746 */ 2747 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2748 hci_stack->sco_packet_handler = handler; 2749 } 2750 #endif 2751 2752 static void hci_state_reset(void){ 2753 // no connections yet 2754 hci_stack->connections = NULL; 2755 2756 // keep discoverable/connectable as this has been requested by the client(s) 2757 // hci_stack->discoverable = 0; 2758 // hci_stack->connectable = 0; 2759 // hci_stack->bondable = 1; 2760 // hci_stack->own_addr_type = 0; 2761 2762 // buffer is free 2763 hci_stack->hci_packet_buffer_reserved = 0; 2764 2765 // no pending cmds 2766 hci_stack->decline_reason = 0; 2767 hci_stack->new_scan_enable_value = 0xff; 2768 2769 // LE 2770 #ifdef ENABLE_BLE 2771 memset(hci_stack->le_random_address, 0, 6); 2772 hci_stack->le_random_address_set = 0; 2773 #endif 2774 #ifdef ENABLE_LE_CENTRAL 2775 hci_stack->le_scanning_active = 0; 2776 hci_stack->le_scan_type = 0xff; 2777 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2778 hci_stack->le_whitelist = 0; 2779 hci_stack->le_whitelist_capacity = 0; 2780 #endif 2781 } 2782 2783 #ifdef ENABLE_CLASSIC 2784 /** 2785 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2786 */ 2787 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2788 // store and open remote device db 2789 hci_stack->link_key_db = link_key_db; 2790 if (hci_stack->link_key_db) { 2791 hci_stack->link_key_db->open(); 2792 } 2793 } 2794 #endif 2795 2796 void hci_init(const hci_transport_t *transport, const void *config){ 2797 2798 #ifdef HAVE_MALLOC 2799 if (!hci_stack) { 2800 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2801 } 2802 #else 2803 hci_stack = &hci_stack_static; 2804 #endif 2805 memset(hci_stack, 0, sizeof(hci_stack_t)); 2806 2807 // reference to use transport layer implementation 2808 hci_stack->hci_transport = transport; 2809 2810 // reference to used config 2811 hci_stack->config = config; 2812 2813 // setup pointer for outgoing packet buffer 2814 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2815 2816 // max acl payload size defined in config.h 2817 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2818 2819 // register packet handlers with transport 2820 transport->register_packet_handler(&packet_handler); 2821 2822 hci_stack->state = HCI_STATE_OFF; 2823 2824 // class of device 2825 hci_stack->class_of_device = 0x007a020c; // Smartphone 2826 2827 // bondable by default 2828 hci_stack->bondable = 1; 2829 2830 #ifdef ENABLE_CLASSIC 2831 // classic name 2832 hci_stack->local_name = default_classic_name; 2833 2834 // Master slave policy 2835 hci_stack->master_slave_policy = 1; 2836 2837 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3, we use 16 as default 2838 hci_stack->gap_required_encyrption_key_size = 16; 2839 #endif 2840 2841 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2842 hci_stack->ssp_enable = 1; 2843 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2844 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2845 hci_stack->ssp_auto_accept = 1; 2846 2847 // voice setting - signed 16 bit pcm data with CVSD over the air 2848 hci_stack->sco_voice_setting = 0x60; 2849 2850 #ifdef ENABLE_LE_CENTRAL 2851 // connection parameter to use for outgoing connections 2852 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2853 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2854 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2855 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2856 hci_stack->le_connection_latency = 4; // 4 2857 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2858 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2859 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2860 2861 // default LE Scanning 2862 hci_stack->le_scan_interval = 0x1e0; 2863 hci_stack->le_scan_window = 0x30; 2864 #endif 2865 2866 #ifdef ENABLE_LE_PERIPHERAL 2867 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2868 #endif 2869 2870 // connection parameter range used to answer connection parameter update requests in l2cap 2871 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2872 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2873 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2874 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2875 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2876 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2877 2878 hci_state_reset(); 2879 } 2880 2881 /** 2882 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2883 */ 2884 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2885 hci_stack->chipset = chipset_driver; 2886 2887 // reset chipset driver - init is also called on power_up 2888 if (hci_stack->chipset && hci_stack->chipset->init){ 2889 hci_stack->chipset->init(hci_stack->config); 2890 } 2891 } 2892 2893 /** 2894 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2895 */ 2896 void hci_set_control(const btstack_control_t *hardware_control){ 2897 // references to used control implementation 2898 hci_stack->control = hardware_control; 2899 // init with transport config 2900 hardware_control->init(hci_stack->config); 2901 } 2902 2903 void hci_close(void){ 2904 // close remote device db 2905 if (hci_stack->link_key_db) { 2906 hci_stack->link_key_db->close(); 2907 } 2908 2909 btstack_linked_list_iterator_t lit; 2910 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2911 while (btstack_linked_list_iterator_has_next(&lit)){ 2912 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2913 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2914 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2915 hci_shutdown_connection(connection); 2916 } 2917 2918 hci_power_control(HCI_POWER_OFF); 2919 2920 #ifdef HAVE_MALLOC 2921 free(hci_stack); 2922 #endif 2923 hci_stack = NULL; 2924 } 2925 2926 #ifdef ENABLE_CLASSIC 2927 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 2928 // validate ranage and set 2929 if (encryption_key_size < 7) return; 2930 if (encryption_key_size > 16) return; 2931 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 2932 } 2933 #endif 2934 2935 #ifdef ENABLE_CLASSIC 2936 void gap_set_class_of_device(uint32_t class_of_device){ 2937 hci_stack->class_of_device = class_of_device; 2938 } 2939 2940 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 2941 hci_stack->default_link_policy_settings = default_link_policy_settings; 2942 } 2943 2944 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 2945 hci_stack->link_supervision_timeout = link_supervision_timeout; 2946 } 2947 2948 void hci_disable_l2cap_timeout_check(void){ 2949 disable_l2cap_timeouts = 1; 2950 } 2951 #endif 2952 2953 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2954 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2955 void hci_set_bd_addr(bd_addr_t addr){ 2956 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 2957 hci_stack->custom_bd_addr_set = 1; 2958 } 2959 #endif 2960 2961 // State-Module-Driver overview 2962 // state module low-level 2963 // HCI_STATE_OFF off close 2964 // HCI_STATE_INITIALIZING, on open 2965 // HCI_STATE_WORKING, on open 2966 // HCI_STATE_HALTING, on open 2967 // HCI_STATE_SLEEPING, off/sleep close 2968 // HCI_STATE_FALLING_ASLEEP on open 2969 2970 static int hci_power_control_on(void){ 2971 2972 // power on 2973 int err = 0; 2974 if (hci_stack->control && hci_stack->control->on){ 2975 err = (*hci_stack->control->on)(); 2976 } 2977 if (err){ 2978 log_error( "POWER_ON failed"); 2979 hci_emit_hci_open_failed(); 2980 return err; 2981 } 2982 2983 // int chipset driver 2984 if (hci_stack->chipset && hci_stack->chipset->init){ 2985 hci_stack->chipset->init(hci_stack->config); 2986 } 2987 2988 // init transport 2989 if (hci_stack->hci_transport->init){ 2990 hci_stack->hci_transport->init(hci_stack->config); 2991 } 2992 2993 // open transport 2994 err = hci_stack->hci_transport->open(); 2995 if (err){ 2996 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2997 if (hci_stack->control && hci_stack->control->off){ 2998 (*hci_stack->control->off)(); 2999 } 3000 hci_emit_hci_open_failed(); 3001 return err; 3002 } 3003 return 0; 3004 } 3005 3006 static void hci_power_control_off(void){ 3007 3008 log_info("hci_power_control_off"); 3009 3010 // close low-level device 3011 hci_stack->hci_transport->close(); 3012 3013 log_info("hci_power_control_off - hci_transport closed"); 3014 3015 // power off 3016 if (hci_stack->control && hci_stack->control->off){ 3017 (*hci_stack->control->off)(); 3018 } 3019 3020 log_info("hci_power_control_off - control closed"); 3021 3022 hci_stack->state = HCI_STATE_OFF; 3023 } 3024 3025 static void hci_power_control_sleep(void){ 3026 3027 log_info("hci_power_control_sleep"); 3028 3029 #if 0 3030 // don't close serial port during sleep 3031 3032 // close low-level device 3033 hci_stack->hci_transport->close(hci_stack->config); 3034 #endif 3035 3036 // sleep mode 3037 if (hci_stack->control && hci_stack->control->sleep){ 3038 (*hci_stack->control->sleep)(); 3039 } 3040 3041 hci_stack->state = HCI_STATE_SLEEPING; 3042 } 3043 3044 static int hci_power_control_wake(void){ 3045 3046 log_info("hci_power_control_wake"); 3047 3048 // wake on 3049 if (hci_stack->control && hci_stack->control->wake){ 3050 (*hci_stack->control->wake)(); 3051 } 3052 3053 #if 0 3054 // open low-level device 3055 int err = hci_stack->hci_transport->open(hci_stack->config); 3056 if (err){ 3057 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3058 if (hci_stack->control && hci_stack->control->off){ 3059 (*hci_stack->control->off)(); 3060 } 3061 hci_emit_hci_open_failed(); 3062 return err; 3063 } 3064 #endif 3065 3066 return 0; 3067 } 3068 3069 static void hci_power_transition_to_initializing(void){ 3070 // set up state machine 3071 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3072 hci_stack->hci_packet_buffer_reserved = 0; 3073 hci_stack->state = HCI_STATE_INITIALIZING; 3074 hci_stack->substate = HCI_INIT_SEND_RESET; 3075 } 3076 3077 int hci_power_control(HCI_POWER_MODE power_mode){ 3078 3079 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3080 3081 int err = 0; 3082 switch (hci_stack->state){ 3083 3084 case HCI_STATE_OFF: 3085 switch (power_mode){ 3086 case HCI_POWER_ON: 3087 err = hci_power_control_on(); 3088 if (err) { 3089 log_error("hci_power_control_on() error %d", err); 3090 return err; 3091 } 3092 hci_power_transition_to_initializing(); 3093 break; 3094 case HCI_POWER_OFF: 3095 // do nothing 3096 break; 3097 case HCI_POWER_SLEEP: 3098 // do nothing (with SLEEP == OFF) 3099 break; 3100 } 3101 break; 3102 3103 case HCI_STATE_INITIALIZING: 3104 switch (power_mode){ 3105 case HCI_POWER_ON: 3106 // do nothing 3107 break; 3108 case HCI_POWER_OFF: 3109 // no connections yet, just turn it off 3110 hci_power_control_off(); 3111 break; 3112 case HCI_POWER_SLEEP: 3113 // no connections yet, just turn it off 3114 hci_power_control_sleep(); 3115 break; 3116 } 3117 break; 3118 3119 case HCI_STATE_WORKING: 3120 switch (power_mode){ 3121 case HCI_POWER_ON: 3122 // do nothing 3123 break; 3124 case HCI_POWER_OFF: 3125 // see hci_run 3126 hci_stack->state = HCI_STATE_HALTING; 3127 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3128 break; 3129 case HCI_POWER_SLEEP: 3130 // see hci_run 3131 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3132 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3133 break; 3134 } 3135 break; 3136 3137 case HCI_STATE_HALTING: 3138 switch (power_mode){ 3139 case HCI_POWER_ON: 3140 hci_power_transition_to_initializing(); 3141 break; 3142 case HCI_POWER_OFF: 3143 // do nothing 3144 break; 3145 case HCI_POWER_SLEEP: 3146 // see hci_run 3147 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3148 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3149 break; 3150 } 3151 break; 3152 3153 case HCI_STATE_FALLING_ASLEEP: 3154 switch (power_mode){ 3155 case HCI_POWER_ON: 3156 3157 #ifdef HAVE_PLATFORM_IPHONE_OS 3158 // nothing to do, if H4 supports power management 3159 if (btstack_control_iphone_power_management_enabled()){ 3160 hci_stack->state = HCI_STATE_INITIALIZING; 3161 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3162 break; 3163 } 3164 #endif 3165 hci_power_transition_to_initializing(); 3166 break; 3167 case HCI_POWER_OFF: 3168 // see hci_run 3169 hci_stack->state = HCI_STATE_HALTING; 3170 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3171 break; 3172 case HCI_POWER_SLEEP: 3173 // do nothing 3174 break; 3175 } 3176 break; 3177 3178 case HCI_STATE_SLEEPING: 3179 switch (power_mode){ 3180 case HCI_POWER_ON: 3181 3182 #ifdef HAVE_PLATFORM_IPHONE_OS 3183 // nothing to do, if H4 supports power management 3184 if (btstack_control_iphone_power_management_enabled()){ 3185 hci_stack->state = HCI_STATE_INITIALIZING; 3186 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3187 hci_update_scan_enable(); 3188 break; 3189 } 3190 #endif 3191 err = hci_power_control_wake(); 3192 if (err) return err; 3193 hci_power_transition_to_initializing(); 3194 break; 3195 case HCI_POWER_OFF: 3196 hci_stack->state = HCI_STATE_HALTING; 3197 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3198 break; 3199 case HCI_POWER_SLEEP: 3200 // do nothing 3201 break; 3202 } 3203 break; 3204 } 3205 3206 // create internal event 3207 hci_emit_state(); 3208 3209 // trigger next/first action 3210 hci_run(); 3211 3212 return 0; 3213 } 3214 3215 3216 #ifdef ENABLE_CLASSIC 3217 3218 static void hci_update_scan_enable(void){ 3219 // 2 = page scan, 1 = inq scan 3220 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3221 hci_run(); 3222 } 3223 3224 void gap_discoverable_control(uint8_t enable){ 3225 if (enable) enable = 1; // normalize argument 3226 3227 if (hci_stack->discoverable == enable){ 3228 hci_emit_discoverable_enabled(hci_stack->discoverable); 3229 return; 3230 } 3231 3232 hci_stack->discoverable = enable; 3233 hci_update_scan_enable(); 3234 } 3235 3236 void gap_connectable_control(uint8_t enable){ 3237 if (enable) enable = 1; // normalize argument 3238 3239 // don't emit event 3240 if (hci_stack->connectable == enable) return; 3241 3242 hci_stack->connectable = enable; 3243 hci_update_scan_enable(); 3244 } 3245 #endif 3246 3247 void gap_local_bd_addr(bd_addr_t address_buffer){ 3248 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3249 } 3250 3251 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3252 static void hci_host_num_completed_packets(void){ 3253 3254 // create packet manually as arrays are not supported and num_commands should not get reduced 3255 hci_reserve_packet_buffer(); 3256 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3257 3258 uint16_t size = 0; 3259 uint16_t num_handles = 0; 3260 packet[size++] = 0x35; 3261 packet[size++] = 0x0c; 3262 size++; // skip param len 3263 size++; // skip num handles 3264 3265 // add { handle, packets } entries 3266 btstack_linked_item_t * it; 3267 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3268 hci_connection_t * connection = (hci_connection_t *) it; 3269 if (connection->num_packets_completed){ 3270 little_endian_store_16(packet, size, connection->con_handle); 3271 size += 2; 3272 little_endian_store_16(packet, size, connection->num_packets_completed); 3273 size += 2; 3274 // 3275 num_handles++; 3276 connection->num_packets_completed = 0; 3277 } 3278 } 3279 3280 packet[2] = size - 3; 3281 packet[3] = num_handles; 3282 3283 hci_stack->host_completed_packets = 0; 3284 3285 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3286 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3287 3288 // release packet buffer for synchronous transport implementations 3289 if (hci_transport_synchronous()){ 3290 hci_release_packet_buffer(); 3291 hci_emit_transport_packet_sent(); 3292 } 3293 } 3294 #endif 3295 3296 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3297 UNUSED(ds); 3298 hci_stack->substate = HCI_HALTING_CLOSE; 3299 // allow packet handlers to defer final shutdown 3300 hci_emit_state(); 3301 hci_run(); 3302 } 3303 3304 static void hci_run(void){ 3305 3306 // log_info("hci_run: entered"); 3307 btstack_linked_item_t * it; 3308 3309 // send continuation fragments first, as they block the prepared packet buffer 3310 if (hci_stack->acl_fragmentation_total_size > 0) { 3311 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3312 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3313 if (connection) { 3314 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3315 hci_send_acl_packet_fragments(connection); 3316 return; 3317 } 3318 } else { 3319 // connection gone -> discard further fragments 3320 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3321 hci_stack->acl_fragmentation_total_size = 0; 3322 hci_stack->acl_fragmentation_pos = 0; 3323 } 3324 } 3325 3326 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3327 // send host num completed packets next as they don't require num_cmd_packets > 0 3328 if (!hci_can_send_comand_packet_transport()) return; 3329 if (hci_stack->host_completed_packets){ 3330 hci_host_num_completed_packets(); 3331 return; 3332 } 3333 #endif 3334 3335 if (!hci_can_send_command_packet_now()) return; 3336 3337 // global/non-connection oriented commands 3338 3339 #ifdef ENABLE_CLASSIC 3340 // decline incoming connections 3341 if (hci_stack->decline_reason){ 3342 uint8_t reason = hci_stack->decline_reason; 3343 hci_stack->decline_reason = 0; 3344 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3345 return; 3346 } 3347 // send scan enable 3348 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3349 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3350 hci_stack->new_scan_enable_value = 0xff; 3351 return; 3352 } 3353 // start/stop inquiry 3354 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3355 uint8_t duration = hci_stack->inquiry_state; 3356 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3357 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3358 return; 3359 } 3360 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3361 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3362 hci_send_cmd(&hci_inquiry_cancel); 3363 return; 3364 } 3365 // remote name request 3366 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3367 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3368 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3369 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3370 return; 3371 } 3372 // pairing 3373 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3374 uint8_t state = hci_stack->gap_pairing_state; 3375 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3376 switch (state){ 3377 case GAP_PAIRING_STATE_SEND_PIN: 3378 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); 3379 break; 3380 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3381 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3382 break; 3383 case GAP_PAIRING_STATE_SEND_PASSKEY: 3384 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3385 break; 3386 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3387 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3388 break; 3389 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3390 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3391 break; 3392 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3393 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3394 break; 3395 default: 3396 break; 3397 } 3398 return; 3399 } 3400 #endif 3401 3402 #ifdef ENABLE_BLE 3403 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 3404 if ((hci_stack->state == HCI_STATE_WORKING) 3405 && ((hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC) || hci_stack->le_random_address_set)){ 3406 3407 #ifdef ENABLE_LE_CENTRAL 3408 // handle le scan 3409 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3410 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3411 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3412 return; 3413 } 3414 if (hci_stack->le_scan_type != 0xff){ 3415 // defaults: active scanning, accept all advertisement packets 3416 int scan_type = hci_stack->le_scan_type; 3417 hci_stack->le_scan_type = 0xff; 3418 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); 3419 return; 3420 } 3421 #endif 3422 #ifdef ENABLE_LE_PERIPHERAL 3423 // le advertisement control 3424 if (hci_stack->le_advertisements_todo){ 3425 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3426 } 3427 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3428 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3429 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3430 return; 3431 } 3432 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3433 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3434 hci_send_cmd(&hci_le_set_advertising_parameters, 3435 hci_stack->le_advertisements_interval_min, 3436 hci_stack->le_advertisements_interval_max, 3437 hci_stack->le_advertisements_type, 3438 hci_stack->le_own_addr_type, 3439 hci_stack->le_advertisements_direct_address_type, 3440 hci_stack->le_advertisements_direct_address, 3441 hci_stack->le_advertisements_channel_map, 3442 hci_stack->le_advertisements_filter_policy); 3443 return; 3444 } 3445 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3446 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3447 uint8_t adv_data_clean[31]; 3448 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3449 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3450 hci_stack->le_advertisements_data_len); 3451 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3452 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3453 return; 3454 } 3455 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3456 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3457 uint8_t scan_data_clean[31]; 3458 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3459 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3460 hci_stack->le_scan_response_data_len); 3461 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3462 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3463 return; 3464 } 3465 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3466 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3467 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3468 return; 3469 } 3470 #endif 3471 3472 #ifdef ENABLE_LE_CENTRAL 3473 // 3474 // LE Whitelist Management 3475 // 3476 3477 // check if whitelist needs modification 3478 btstack_linked_list_iterator_t lit; 3479 int modification_pending = 0; 3480 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3481 while (btstack_linked_list_iterator_has_next(&lit)){ 3482 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3483 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3484 modification_pending = 1; 3485 break; 3486 } 3487 } 3488 3489 if (modification_pending){ 3490 // stop connnecting if modification pending 3491 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3492 hci_send_cmd(&hci_le_create_connection_cancel); 3493 return; 3494 } 3495 3496 // add/remove entries 3497 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3498 while (btstack_linked_list_iterator_has_next(&lit)){ 3499 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3500 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3501 entry->state = LE_WHITELIST_ON_CONTROLLER; 3502 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3503 return; 3504 3505 } 3506 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3507 bd_addr_t address; 3508 bd_addr_type_t address_type = entry->address_type; 3509 (void)memcpy(address, entry->address, 6); 3510 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3511 btstack_memory_whitelist_entry_free(entry); 3512 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3513 return; 3514 } 3515 } 3516 } 3517 3518 // start connecting 3519 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && 3520 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3521 bd_addr_t null_addr; 3522 memset(null_addr, 0, 6); 3523 hci_send_cmd(&hci_le_create_connection, 3524 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3525 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3526 1, // use whitelist 3527 0, // peer address type 3528 null_addr, // peer bd addr 3529 hci_stack->le_own_addr_type, // our addr type: 3530 hci_stack->le_connection_interval_min, // conn interval min 3531 hci_stack->le_connection_interval_max, // conn interval max 3532 hci_stack->le_connection_latency, // conn latency 3533 hci_stack->le_supervision_timeout, // conn latency 3534 hci_stack->le_minimum_ce_length, // min ce length 3535 hci_stack->le_maximum_ce_length // max ce length 3536 ); 3537 return; 3538 } 3539 #endif 3540 } 3541 #endif 3542 3543 // send pending HCI commands 3544 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3545 hci_connection_t * connection = (hci_connection_t *) it; 3546 3547 switch(connection->state){ 3548 case SEND_CREATE_CONNECTION: 3549 switch(connection->address_type){ 3550 #ifdef ENABLE_CLASSIC 3551 case BD_ADDR_TYPE_ACL: 3552 log_info("sending hci_create_connection"); 3553 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3554 break; 3555 #endif 3556 default: 3557 #ifdef ENABLE_BLE 3558 #ifdef ENABLE_LE_CENTRAL 3559 // track outgoing connection 3560 hci_stack->outgoing_addr_type = connection->address_type; 3561 (void)memcpy(hci_stack->outgoing_addr, 3562 connection->address, 6); 3563 log_info("sending hci_le_create_connection"); 3564 hci_send_cmd(&hci_le_create_connection, 3565 hci_stack->le_connection_scan_interval, // conn scan interval 3566 hci_stack->le_connection_scan_window, // conn scan windows 3567 0, // don't use whitelist 3568 connection->address_type, // peer address type 3569 connection->address, // peer bd addr 3570 hci_stack->le_own_addr_type, // our addr type: 3571 hci_stack->le_connection_interval_min, // conn interval min 3572 hci_stack->le_connection_interval_max, // conn interval max 3573 hci_stack->le_connection_latency, // conn latency 3574 hci_stack->le_supervision_timeout, // conn latency 3575 hci_stack->le_minimum_ce_length, // min ce length 3576 hci_stack->le_maximum_ce_length // max ce length 3577 ); 3578 connection->state = SENT_CREATE_CONNECTION; 3579 #endif 3580 #endif 3581 break; 3582 } 3583 return; 3584 3585 #ifdef ENABLE_CLASSIC 3586 case RECEIVED_CONNECTION_REQUEST: 3587 connection->role = HCI_ROLE_SLAVE; 3588 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3589 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3590 connection->state = ACCEPTED_CONNECTION_REQUEST; 3591 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3592 } 3593 return; 3594 #endif 3595 3596 #ifdef ENABLE_BLE 3597 #ifdef ENABLE_LE_CENTRAL 3598 case SEND_CANCEL_CONNECTION: 3599 connection->state = SENT_CANCEL_CONNECTION; 3600 hci_send_cmd(&hci_le_create_connection_cancel); 3601 return; 3602 #endif 3603 #endif 3604 case SEND_DISCONNECT: 3605 connection->state = SENT_DISCONNECT; 3606 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3607 return; 3608 3609 default: 3610 break; 3611 } 3612 3613 // no further commands if connection is about to get shut down 3614 if (connection->state == SENT_DISCONNECT) continue; 3615 3616 if (connection->authentication_flags & READ_RSSI){ 3617 connectionClearAuthenticationFlags(connection, READ_RSSI); 3618 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3619 return; 3620 } 3621 3622 #ifdef ENABLE_CLASSIC 3623 3624 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 3625 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 3626 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 3627 return; 3628 } 3629 3630 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3631 log_info("responding to link key request"); 3632 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3633 link_key_t link_key; 3634 link_key_type_t link_key_type; 3635 if ( hci_stack->link_key_db 3636 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3637 && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level)){ 3638 connection->link_key_type = link_key_type; 3639 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3640 } else { 3641 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3642 } 3643 return; 3644 } 3645 3646 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3647 log_info("denying to pin request"); 3648 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3649 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3650 return; 3651 } 3652 3653 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3654 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3655 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3656 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3657 // tweak authentication requirements 3658 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3659 if (connection->bonding_flags & BONDING_DEDICATED){ 3660 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3661 } 3662 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3663 authreq |= 1; 3664 } 3665 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3666 } else { 3667 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3668 } 3669 return; 3670 } 3671 3672 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3673 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3674 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3675 return; 3676 } 3677 3678 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3679 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3680 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3681 return; 3682 } 3683 3684 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3685 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3686 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3687 return; 3688 } 3689 3690 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3691 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3692 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3693 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3694 return; 3695 } 3696 3697 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3698 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3699 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3700 return; 3701 } 3702 3703 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3704 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3705 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3706 return; 3707 } 3708 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3709 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3710 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3711 return; 3712 } 3713 #endif 3714 3715 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3716 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3717 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3718 return; 3719 } 3720 3721 #ifdef ENABLE_CLASSIC 3722 uint16_t sniff_min_interval; 3723 switch (connection->sniff_min_interval){ 3724 case 0: 3725 break; 3726 case 0xffff: 3727 connection->sniff_min_interval = 0; 3728 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3729 return; 3730 default: 3731 sniff_min_interval = connection->sniff_min_interval; 3732 connection->sniff_min_interval = 0; 3733 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3734 return; 3735 } 3736 #endif 3737 3738 #ifdef ENABLE_BLE 3739 switch (connection->le_con_parameter_update_state){ 3740 // response to L2CAP CON PARAMETER UPDATE REQUEST 3741 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3742 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3743 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3744 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3745 0x0000, 0xffff); 3746 return; 3747 case CON_PARAMETER_UPDATE_REPLY: 3748 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3749 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3750 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3751 0x0000, 0xffff); 3752 return; 3753 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3754 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3755 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3756 return; 3757 default: 3758 break; 3759 } 3760 if (connection->le_phy_update_all_phys != 0xff){ 3761 uint8_t all_phys = connection->le_phy_update_all_phys; 3762 connection->le_phy_update_all_phys = 0xff; 3763 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); 3764 return; 3765 } 3766 #endif 3767 } 3768 3769 hci_connection_t * connection; 3770 switch (hci_stack->state){ 3771 case HCI_STATE_INITIALIZING: 3772 hci_initializing_run(); 3773 break; 3774 3775 case HCI_STATE_HALTING: 3776 3777 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 3778 switch (hci_stack->substate){ 3779 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 3780 case HCI_HALTING_DISCONNECT_ALL_TIMER: 3781 3782 #ifdef ENABLE_BLE 3783 #ifdef ENABLE_LE_CENTRAL 3784 // free whitelist entries 3785 { 3786 btstack_linked_list_iterator_t lit; 3787 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3788 while (btstack_linked_list_iterator_has_next(&lit)){ 3789 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3790 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3791 btstack_memory_whitelist_entry_free(entry); 3792 } 3793 } 3794 #endif 3795 #endif 3796 // close all open connections 3797 connection = (hci_connection_t *) hci_stack->connections; 3798 if (connection){ 3799 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3800 if (!hci_can_send_command_packet_now()) return; 3801 3802 // check state 3803 if (connection->state == SENT_DISCONNECT) return; 3804 connection->state = SENT_DISCONNECT; 3805 3806 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3807 3808 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3809 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3810 3811 // ... which would be ignored anyway as we shutdown (free) the connection now 3812 hci_shutdown_connection(connection); 3813 3814 // finally, send the disconnect command 3815 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3816 return; 3817 } 3818 3819 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 3820 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 3821 log_info("HCI_STATE_HALTING: wait 50 ms"); 3822 hci_stack->substate = HCI_HALTING_W4_TIMER; 3823 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 3824 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3825 btstack_run_loop_add_timer(&hci_stack->timeout); 3826 break; 3827 } 3828 3829 /* explicit fall-through */ 3830 3831 case HCI_HALTING_CLOSE: 3832 log_info("HCI_STATE_HALTING, calling off"); 3833 3834 // switch mode 3835 hci_power_control_off(); 3836 3837 log_info("HCI_STATE_HALTING, emitting state"); 3838 hci_emit_state(); 3839 log_info("HCI_STATE_HALTING, done"); 3840 break; 3841 3842 case HCI_HALTING_W4_TIMER: 3843 // keep waiting 3844 3845 break; 3846 default: 3847 break; 3848 } 3849 3850 break; 3851 3852 case HCI_STATE_FALLING_ASLEEP: 3853 switch(hci_stack->substate) { 3854 case HCI_FALLING_ASLEEP_DISCONNECT: 3855 log_info("HCI_STATE_FALLING_ASLEEP"); 3856 // close all open connections 3857 connection = (hci_connection_t *) hci_stack->connections; 3858 3859 #ifdef HAVE_PLATFORM_IPHONE_OS 3860 // don't close connections, if H4 supports power management 3861 if (btstack_control_iphone_power_management_enabled()){ 3862 connection = NULL; 3863 } 3864 #endif 3865 if (connection){ 3866 3867 // send disconnect 3868 if (!hci_can_send_command_packet_now()) return; 3869 3870 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3871 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3872 3873 // send disconnected event right away - causes higher layer connections to get closed, too. 3874 hci_shutdown_connection(connection); 3875 return; 3876 } 3877 3878 if (hci_classic_supported()){ 3879 // disable page and inquiry scan 3880 if (!hci_can_send_command_packet_now()) return; 3881 3882 log_info("HCI_STATE_HALTING, disabling inq scans"); 3883 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3884 3885 // continue in next sub state 3886 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3887 break; 3888 } 3889 // no break - fall through for ble-only chips 3890 3891 case HCI_FALLING_ASLEEP_COMPLETE: 3892 log_info("HCI_STATE_HALTING, calling sleep"); 3893 #ifdef HAVE_PLATFORM_IPHONE_OS 3894 // don't actually go to sleep, if H4 supports power management 3895 if (btstack_control_iphone_power_management_enabled()){ 3896 // SLEEP MODE reached 3897 hci_stack->state = HCI_STATE_SLEEPING; 3898 hci_emit_state(); 3899 break; 3900 } 3901 #endif 3902 // switch mode 3903 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3904 hci_emit_state(); 3905 break; 3906 3907 default: 3908 break; 3909 } 3910 break; 3911 3912 default: 3913 break; 3914 } 3915 } 3916 3917 int hci_send_cmd_packet(uint8_t *packet, int size){ 3918 // house-keeping 3919 3920 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3921 hci_stack->loopback_mode = packet[3]; 3922 } 3923 3924 #ifdef ENABLE_CLASSIC 3925 bd_addr_t addr; 3926 hci_connection_t * conn; 3927 3928 // create_connection? 3929 if (IS_COMMAND(packet, hci_create_connection)){ 3930 reverse_bd_addr(&packet[3], addr); 3931 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3932 3933 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3934 if (!conn){ 3935 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3936 if (!conn){ 3937 // notify client that alloc failed 3938 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3939 return -1; // packet not sent to controller 3940 } 3941 conn->state = SEND_CREATE_CONNECTION; 3942 } 3943 log_info("conn state %u", conn->state); 3944 switch (conn->state){ 3945 // if connection active exists 3946 case OPEN: 3947 // and OPEN, emit connection complete command 3948 hci_emit_connection_complete(addr, conn->con_handle, 0); 3949 return -1; // packet not sent to controller 3950 case SEND_CREATE_CONNECTION: 3951 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 3952 break; 3953 default: 3954 // otherwise, just ignore as it is already in the open process 3955 return -1; // packet not sent to controller 3956 } 3957 conn->state = SENT_CREATE_CONNECTION; 3958 3959 // track outgoing connection 3960 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 3961 (void)memcpy(hci_stack->outgoing_addr, addr, 6); 3962 } 3963 3964 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3965 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3966 } 3967 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3968 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3969 } 3970 3971 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3972 if (hci_stack->link_key_db){ 3973 reverse_bd_addr(&packet[3], addr); 3974 hci_stack->link_key_db->delete_link_key(addr); 3975 } 3976 } 3977 3978 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3979 || IS_COMMAND(packet, hci_pin_code_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, LEGACY_PAIRING_ACTIVE); 3984 } 3985 } 3986 3987 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3988 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3989 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3990 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3991 reverse_bd_addr(&packet[3], addr); 3992 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3993 if (conn){ 3994 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3995 } 3996 } 3997 3998 #ifdef ENABLE_SCO_OVER_HCI 3999 // setup_synchronous_connection? Voice setting at offset 22 4000 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 4001 // TODO: compare to current setting if sco connection already active 4002 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4003 } 4004 // accept_synchronus_connection? Voice setting at offset 18 4005 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 4006 // TODO: compare to current setting if sco connection already active 4007 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4008 } 4009 #endif 4010 #endif 4011 4012 #ifdef ENABLE_BLE 4013 if (IS_COMMAND(packet, hci_le_set_random_address)){ 4014 hci_stack->le_random_address_set = 1; 4015 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4016 } 4017 #ifdef ENABLE_LE_PERIPHERAL 4018 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 4019 hci_stack->le_advertisements_active = packet[3]; 4020 } 4021 #endif 4022 #ifdef ENABLE_LE_CENTRAL 4023 if (IS_COMMAND(packet, hci_le_create_connection)){ 4024 // white list used? 4025 uint8_t initiator_filter_policy = packet[7]; 4026 switch (initiator_filter_policy){ 4027 case 0: 4028 // whitelist not used 4029 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4030 break; 4031 case 1: 4032 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4033 break; 4034 default: 4035 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4036 break; 4037 } 4038 } 4039 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 4040 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4041 } 4042 #endif 4043 #endif 4044 4045 hci_stack->num_cmd_packets--; 4046 4047 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4048 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4049 } 4050 4051 // disconnect because of security block 4052 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4053 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4054 if (!connection) return; 4055 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4056 } 4057 4058 4059 // Configure Secure Simple Pairing 4060 4061 #ifdef ENABLE_CLASSIC 4062 4063 // enable will enable SSP during init 4064 void gap_ssp_set_enable(int enable){ 4065 hci_stack->ssp_enable = enable; 4066 } 4067 4068 static int hci_local_ssp_activated(void){ 4069 return gap_ssp_supported() && hci_stack->ssp_enable; 4070 } 4071 4072 // if set, BTstack will respond to io capability request using authentication requirement 4073 void gap_ssp_set_io_capability(int io_capability){ 4074 hci_stack->ssp_io_capability = io_capability; 4075 } 4076 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4077 hci_stack->ssp_authentication_requirement = authentication_requirement; 4078 } 4079 4080 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4081 void gap_ssp_set_auto_accept(int auto_accept){ 4082 hci_stack->ssp_auto_accept = auto_accept; 4083 } 4084 #endif 4085 4086 // va_list part of hci_send_cmd 4087 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4088 if (!hci_can_send_command_packet_now()){ 4089 log_error("hci_send_cmd called but cannot send packet now"); 4090 return 0; 4091 } 4092 4093 // for HCI INITIALIZATION 4094 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4095 hci_stack->last_cmd_opcode = cmd->opcode; 4096 4097 hci_reserve_packet_buffer(); 4098 uint8_t * packet = hci_stack->hci_packet_buffer; 4099 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4100 int err = hci_send_cmd_packet(packet, size); 4101 4102 // release packet buffer for synchronous transport implementations 4103 if (hci_transport_synchronous()){ 4104 hci_release_packet_buffer(); 4105 hci_emit_transport_packet_sent(); 4106 } 4107 4108 return err; 4109 } 4110 4111 /** 4112 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4113 */ 4114 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4115 va_list argptr; 4116 va_start(argptr, cmd); 4117 int res = hci_send_cmd_va_arg(cmd, argptr); 4118 va_end(argptr); 4119 return res; 4120 } 4121 4122 // Create various non-HCI events. 4123 // TODO: generalize, use table similar to hci_create_command 4124 4125 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4126 // dump packet 4127 if (dump) { 4128 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4129 } 4130 4131 // dispatch to all event handlers 4132 btstack_linked_list_iterator_t it; 4133 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4134 while (btstack_linked_list_iterator_has_next(&it)){ 4135 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4136 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4137 } 4138 } 4139 4140 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4141 if (!hci_stack->acl_packet_handler) return; 4142 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4143 } 4144 4145 #ifdef ENABLE_CLASSIC 4146 static void hci_notify_if_sco_can_send_now(void){ 4147 // notify SCO sender if waiting 4148 if (!hci_stack->sco_waiting_for_can_send_now) return; 4149 if (hci_can_send_sco_packet_now()){ 4150 hci_stack->sco_waiting_for_can_send_now = 0; 4151 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4152 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4153 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4154 } 4155 } 4156 4157 // parsing end emitting has been merged to reduce code size 4158 static void gap_inquiry_explode(uint8_t * packet){ 4159 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4160 4161 uint8_t * eir_data; 4162 ad_context_t context; 4163 const uint8_t * name; 4164 uint8_t name_len; 4165 4166 int event_type = hci_event_packet_get_type(packet); 4167 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4168 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4169 4170 // event[1] is set at the end 4171 int i; 4172 for (i=0; i<num_responses;i++){ 4173 memset(event, 0, sizeof(event)); 4174 event[0] = GAP_EVENT_INQUIRY_RESULT; 4175 uint8_t event_size = 18; // if name is not set by EIR 4176 4177 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4178 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4179 (void)memcpy(&event[9], 4180 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4181 3); // class of device 4182 (void)memcpy(&event[12], 4183 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4184 2); // clock offset 4185 4186 switch (event_type){ 4187 case HCI_EVENT_INQUIRY_RESULT: 4188 // 14,15,16,17 = 0, size 18 4189 break; 4190 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4191 event[14] = 1; 4192 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4193 // 16,17 = 0, size 18 4194 break; 4195 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4196 event[14] = 1; 4197 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4198 // for EIR packets, there is only one reponse in it 4199 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4200 name = NULL; 4201 // EIR data is 240 bytes in EIR event 4202 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4203 uint8_t data_type = ad_iterator_get_data_type(&context); 4204 uint8_t data_size = ad_iterator_get_data_len(&context); 4205 const uint8_t * data = ad_iterator_get_data(&context); 4206 // Prefer Complete Local Name over Shortend Local Name 4207 switch (data_type){ 4208 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4209 if (name) continue; 4210 /* explicit fall-through */ 4211 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4212 name = data; 4213 name_len = data_size; 4214 break; 4215 default: 4216 break; 4217 } 4218 } 4219 if (name){ 4220 event[16] = 1; 4221 // truncate name if needed 4222 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4223 event[17] = len; 4224 (void)memcpy(&event[18], name, len); 4225 event_size += len; 4226 } 4227 break; 4228 } 4229 event[1] = event_size - 2; 4230 hci_emit_event(event, event_size, 1); 4231 } 4232 } 4233 #endif 4234 4235 void hci_emit_state(void){ 4236 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4237 uint8_t event[3]; 4238 event[0] = BTSTACK_EVENT_STATE; 4239 event[1] = sizeof(event) - 2; 4240 event[2] = hci_stack->state; 4241 hci_emit_event(event, sizeof(event), 1); 4242 } 4243 4244 #ifdef ENABLE_CLASSIC 4245 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4246 uint8_t event[13]; 4247 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4248 event[1] = sizeof(event) - 2; 4249 event[2] = status; 4250 little_endian_store_16(event, 3, con_handle); 4251 reverse_bd_addr(address, &event[5]); 4252 event[11] = 1; // ACL connection 4253 event[12] = 0; // encryption disabled 4254 hci_emit_event(event, sizeof(event), 1); 4255 } 4256 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4257 if (disable_l2cap_timeouts) return; 4258 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4259 uint8_t event[4]; 4260 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4261 event[1] = sizeof(event) - 2; 4262 little_endian_store_16(event, 2, conn->con_handle); 4263 hci_emit_event(event, sizeof(event), 1); 4264 } 4265 #endif 4266 4267 #ifdef ENABLE_BLE 4268 #ifdef ENABLE_LE_CENTRAL 4269 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4270 uint8_t event[21]; 4271 event[0] = HCI_EVENT_LE_META; 4272 event[1] = sizeof(event) - 2; 4273 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4274 event[3] = status; 4275 little_endian_store_16(event, 4, con_handle); 4276 event[6] = 0; // TODO: role 4277 event[7] = address_type; 4278 reverse_bd_addr(address, &event[8]); 4279 little_endian_store_16(event, 14, 0); // interval 4280 little_endian_store_16(event, 16, 0); // latency 4281 little_endian_store_16(event, 18, 0); // supervision timeout 4282 event[20] = 0; // master clock accuracy 4283 hci_emit_event(event, sizeof(event), 1); 4284 } 4285 #endif 4286 #endif 4287 4288 static void hci_emit_transport_packet_sent(void){ 4289 // notify upper stack that it might be possible to send again 4290 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4291 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4292 } 4293 4294 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4295 uint8_t event[6]; 4296 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4297 event[1] = sizeof(event) - 2; 4298 event[2] = 0; // status = OK 4299 little_endian_store_16(event, 3, con_handle); 4300 event[5] = reason; 4301 hci_emit_event(event, sizeof(event), 1); 4302 } 4303 4304 static void hci_emit_nr_connections_changed(void){ 4305 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4306 uint8_t event[3]; 4307 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4308 event[1] = sizeof(event) - 2; 4309 event[2] = nr_hci_connections(); 4310 hci_emit_event(event, sizeof(event), 1); 4311 } 4312 4313 static void hci_emit_hci_open_failed(void){ 4314 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4315 uint8_t event[2]; 4316 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4317 event[1] = sizeof(event) - 2; 4318 hci_emit_event(event, sizeof(event), 1); 4319 } 4320 4321 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4322 log_info("hci_emit_dedicated_bonding_result %u ", status); 4323 uint8_t event[9]; 4324 int pos = 0; 4325 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4326 event[pos++] = sizeof(event) - 2; 4327 event[pos++] = status; 4328 reverse_bd_addr(address, &event[pos]); 4329 hci_emit_event(event, sizeof(event), 1); 4330 } 4331 4332 4333 #ifdef ENABLE_CLASSIC 4334 4335 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4336 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4337 uint8_t event[5]; 4338 int pos = 0; 4339 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4340 event[pos++] = sizeof(event) - 2; 4341 little_endian_store_16(event, 2, con_handle); 4342 pos += 2; 4343 event[pos++] = level; 4344 hci_emit_event(event, sizeof(event), 1); 4345 } 4346 4347 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4348 if (!connection) return LEVEL_0; 4349 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4350 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4351 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4352 // LEVEL 4 always requires 128 bit encrytion key size 4353 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4354 security_level = LEVEL_3; 4355 } 4356 return security_level; 4357 } 4358 4359 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4360 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4361 uint8_t event[3]; 4362 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4363 event[1] = sizeof(event) - 2; 4364 event[2] = enabled; 4365 hci_emit_event(event, sizeof(event), 1); 4366 } 4367 4368 // query if remote side supports eSCO 4369 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4370 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4371 if (!connection) return 0; 4372 return connection->remote_supported_feature_eSCO; 4373 } 4374 4375 // query if remote side supports SSP 4376 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4377 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4378 if (!connection) return 0; 4379 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4380 } 4381 4382 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4383 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4384 } 4385 4386 // GAP API 4387 /** 4388 * @bbrief enable/disable bonding. default is enabled 4389 * @praram enabled 4390 */ 4391 void gap_set_bondable_mode(int enable){ 4392 hci_stack->bondable = enable ? 1 : 0; 4393 } 4394 /** 4395 * @brief Get bondable mode. 4396 * @return 1 if bondable 4397 */ 4398 int gap_get_bondable_mode(void){ 4399 return hci_stack->bondable; 4400 } 4401 4402 /** 4403 * @brief map link keys to security levels 4404 */ 4405 gap_security_level_t gap_security_level_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 return LEVEL_4; 4409 case COMBINATION_KEY: 4410 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4411 return LEVEL_3; 4412 default: 4413 return LEVEL_2; 4414 } 4415 } 4416 4417 /** 4418 * @brief map link keys to secure connection yes/no 4419 */ 4420 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4421 switch (link_key_type){ 4422 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4423 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4424 return 1; 4425 default: 4426 return 0; 4427 } 4428 } 4429 4430 /** 4431 * @brief map link keys to authenticated 4432 */ 4433 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4434 switch (link_key_type){ 4435 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4436 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4437 return 1; 4438 default: 4439 return 0; 4440 } 4441 } 4442 4443 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4444 log_info("gap_mitm_protection_required_for_security_level %u", level); 4445 return level > LEVEL_2; 4446 } 4447 4448 /** 4449 * @brief get current security level 4450 */ 4451 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4452 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4453 if (!connection) return LEVEL_0; 4454 return gap_security_level_for_connection(connection); 4455 } 4456 4457 /** 4458 * @brief request connection to device to 4459 * @result GAP_AUTHENTICATION_RESULT 4460 */ 4461 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4462 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4463 if (!connection){ 4464 hci_emit_security_level(con_handle, LEVEL_0); 4465 return; 4466 } 4467 gap_security_level_t current_level = gap_security_level(con_handle); 4468 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4469 requested_level, connection->requested_security_level, current_level); 4470 4471 // assumption: earlier requested security higher than current level => security request is active 4472 if (current_level < connection->requested_security_level){ 4473 if (connection->requested_security_level < requested_level){ 4474 // increase requested level as new level is higher 4475 4476 // TODO: handle re-authentication when done 4477 4478 connection->requested_security_level = requested_level; 4479 } 4480 return; 4481 } 4482 4483 // no request active, notify if security sufficient 4484 if (requested_level <= current_level){ 4485 hci_emit_security_level(con_handle, current_level); 4486 return; 4487 } 4488 4489 // start pairing to increase security level 4490 connection->requested_security_level = requested_level; 4491 4492 #if 0 4493 // sending encryption request without a link key results in an error. 4494 // TODO: figure out how to use it properly 4495 4496 // would enabling ecnryption suffice (>= LEVEL_2)? 4497 if (hci_stack->link_key_db){ 4498 link_key_type_t link_key_type; 4499 link_key_t link_key; 4500 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4501 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4502 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4503 return; 4504 } 4505 } 4506 } 4507 #endif 4508 4509 // start to authenticate connection 4510 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4511 hci_run(); 4512 } 4513 4514 /** 4515 * @brief start dedicated bonding with device. disconnect after bonding 4516 * @param device 4517 * @param request MITM protection 4518 * @result GAP_DEDICATED_BONDING_COMPLETE 4519 */ 4520 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4521 4522 // create connection state machine 4523 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 4524 4525 if (!connection){ 4526 return BTSTACK_MEMORY_ALLOC_FAILED; 4527 } 4528 4529 // delete linkn key 4530 gap_drop_link_key_for_bd_addr(device); 4531 4532 // configure LEVEL_2/3, dedicated bonding 4533 connection->state = SEND_CREATE_CONNECTION; 4534 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4535 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4536 connection->bonding_flags = BONDING_DEDICATED; 4537 4538 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4539 4540 // handle: connnection failure (connection complete != ok) 4541 // handle: authentication failure 4542 // handle: disconnect on done 4543 4544 hci_run(); 4545 4546 return 0; 4547 } 4548 #endif 4549 4550 void gap_set_local_name(const char * local_name){ 4551 hci_stack->local_name = local_name; 4552 } 4553 4554 4555 #ifdef ENABLE_BLE 4556 4557 #ifdef ENABLE_LE_CENTRAL 4558 void gap_start_scan(void){ 4559 hci_stack->le_scanning_enabled = 1; 4560 hci_run(); 4561 } 4562 4563 void gap_stop_scan(void){ 4564 hci_stack->le_scanning_enabled = 0; 4565 hci_run(); 4566 } 4567 4568 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4569 hci_stack->le_scan_type = scan_type; 4570 hci_stack->le_scan_interval = scan_interval; 4571 hci_stack->le_scan_window = scan_window; 4572 hci_run(); 4573 } 4574 4575 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4576 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4577 if (!conn){ 4578 log_info("gap_connect: no connection exists yet, creating context"); 4579 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4580 if (!conn){ 4581 // notify client that alloc failed 4582 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4583 log_info("gap_connect: failed to alloc hci_connection_t"); 4584 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4585 } 4586 conn->state = SEND_CREATE_CONNECTION; 4587 log_info("gap_connect: send create connection next"); 4588 hci_run(); 4589 return 0; 4590 } 4591 4592 if (!hci_is_le_connection(conn) || 4593 (conn->state == SEND_CREATE_CONNECTION) || 4594 (conn->state == SENT_CREATE_CONNECTION)) { 4595 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4596 log_error("gap_connect: classic connection or connect is already being created"); 4597 return GATT_CLIENT_IN_WRONG_STATE; 4598 } 4599 4600 log_info("gap_connect: context exists with state %u", conn->state); 4601 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4602 hci_run(); 4603 return 0; 4604 } 4605 4606 // @assumption: only a single outgoing LE Connection exists 4607 static hci_connection_t * gap_get_outgoing_connection(void){ 4608 btstack_linked_item_t *it; 4609 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4610 hci_connection_t * conn = (hci_connection_t *) it; 4611 if (!hci_is_le_connection(conn)) continue; 4612 switch (conn->state){ 4613 case SEND_CREATE_CONNECTION: 4614 case SENT_CREATE_CONNECTION: 4615 case SENT_CANCEL_CONNECTION: 4616 return conn; 4617 default: 4618 break; 4619 }; 4620 } 4621 return NULL; 4622 } 4623 4624 uint8_t gap_connect_cancel(void){ 4625 hci_connection_t * conn = gap_get_outgoing_connection(); 4626 if (!conn) return 0; 4627 switch (conn->state){ 4628 case SEND_CREATE_CONNECTION: 4629 // skip sending create connection and emit event instead 4630 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4631 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4632 btstack_memory_hci_connection_free( conn ); 4633 break; 4634 case SENT_CREATE_CONNECTION: 4635 // request to send cancel connection 4636 conn->state = SEND_CANCEL_CONNECTION; 4637 hci_run(); 4638 break; 4639 default: 4640 break; 4641 } 4642 return 0; 4643 } 4644 #endif 4645 4646 #ifdef ENABLE_LE_CENTRAL 4647 /** 4648 * @brief Set connection parameters for outgoing connections 4649 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4650 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4651 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4652 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4653 * @param conn_latency, default: 4 4654 * @param supervision_timeout (unit: 10ms), default: 720 ms 4655 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4656 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4657 */ 4658 4659 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4660 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4661 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4662 hci_stack->le_connection_scan_interval = conn_scan_interval; 4663 hci_stack->le_connection_scan_window = conn_scan_window; 4664 hci_stack->le_connection_interval_min = conn_interval_min; 4665 hci_stack->le_connection_interval_max = conn_interval_max; 4666 hci_stack->le_connection_latency = conn_latency; 4667 hci_stack->le_supervision_timeout = supervision_timeout; 4668 hci_stack->le_minimum_ce_length = min_ce_length; 4669 hci_stack->le_maximum_ce_length = max_ce_length; 4670 } 4671 #endif 4672 4673 /** 4674 * @brief Updates the connection parameters for a given LE connection 4675 * @param handle 4676 * @param conn_interval_min (unit: 1.25ms) 4677 * @param conn_interval_max (unit: 1.25ms) 4678 * @param conn_latency 4679 * @param supervision_timeout (unit: 10ms) 4680 * @returns 0 if ok 4681 */ 4682 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4683 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4684 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4685 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4686 connection->le_conn_interval_min = conn_interval_min; 4687 connection->le_conn_interval_max = conn_interval_max; 4688 connection->le_conn_latency = conn_latency; 4689 connection->le_supervision_timeout = supervision_timeout; 4690 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4691 hci_run(); 4692 return 0; 4693 } 4694 4695 /** 4696 * @brief Request an update of the connection parameter for a given LE connection 4697 * @param handle 4698 * @param conn_interval_min (unit: 1.25ms) 4699 * @param conn_interval_max (unit: 1.25ms) 4700 * @param conn_latency 4701 * @param supervision_timeout (unit: 10ms) 4702 * @returns 0 if ok 4703 */ 4704 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4705 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4706 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4707 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4708 connection->le_conn_interval_min = conn_interval_min; 4709 connection->le_conn_interval_max = conn_interval_max; 4710 connection->le_conn_latency = conn_latency; 4711 connection->le_supervision_timeout = supervision_timeout; 4712 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4713 hci_run(); 4714 return 0; 4715 } 4716 4717 #ifdef ENABLE_LE_PERIPHERAL 4718 4719 static void gap_advertisments_changed(void){ 4720 // disable advertisements before updating adv, scan data, or adv params 4721 if (hci_stack->le_advertisements_active){ 4722 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4723 } 4724 hci_run(); 4725 } 4726 4727 /** 4728 * @brief Set Advertisement Data 4729 * @param advertising_data_length 4730 * @param advertising_data (max 31 octets) 4731 * @note data is not copied, pointer has to stay valid 4732 */ 4733 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4734 hci_stack->le_advertisements_data_len = advertising_data_length; 4735 hci_stack->le_advertisements_data = advertising_data; 4736 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4737 gap_advertisments_changed(); 4738 } 4739 4740 /** 4741 * @brief Set Scan Response Data 4742 * @param advertising_data_length 4743 * @param advertising_data (max 31 octets) 4744 * @note data is not copied, pointer has to stay valid 4745 */ 4746 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4747 hci_stack->le_scan_response_data_len = scan_response_data_length; 4748 hci_stack->le_scan_response_data = scan_response_data; 4749 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4750 gap_advertisments_changed(); 4751 } 4752 4753 /** 4754 * @brief Set Advertisement Parameters 4755 * @param adv_int_min 4756 * @param adv_int_max 4757 * @param adv_type 4758 * @param direct_address_type 4759 * @param direct_address 4760 * @param channel_map 4761 * @param filter_policy 4762 * 4763 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4764 */ 4765 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4766 uint8_t direct_address_typ, bd_addr_t direct_address, 4767 uint8_t channel_map, uint8_t filter_policy) { 4768 4769 hci_stack->le_advertisements_interval_min = adv_int_min; 4770 hci_stack->le_advertisements_interval_max = adv_int_max; 4771 hci_stack->le_advertisements_type = adv_type; 4772 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4773 hci_stack->le_advertisements_channel_map = channel_map; 4774 hci_stack->le_advertisements_filter_policy = filter_policy; 4775 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 4776 6); 4777 4778 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4779 gap_advertisments_changed(); 4780 } 4781 4782 /** 4783 * @brief Enable/Disable Advertisements 4784 * @param enabled 4785 */ 4786 void gap_advertisements_enable(int enabled){ 4787 hci_stack->le_advertisements_enabled = enabled; 4788 if (enabled && !hci_stack->le_advertisements_active){ 4789 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4790 } 4791 if (!enabled && hci_stack->le_advertisements_active){ 4792 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4793 } 4794 hci_run(); 4795 } 4796 4797 #endif 4798 4799 void hci_le_set_own_address_type(uint8_t own_address_type){ 4800 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4801 if (own_address_type == hci_stack->le_own_addr_type) return; 4802 hci_stack->le_own_addr_type = own_address_type; 4803 4804 #ifdef ENABLE_LE_PERIPHERAL 4805 // update advertisement parameters, too 4806 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4807 gap_advertisments_changed(); 4808 #endif 4809 #ifdef ENABLE_LE_CENTRAL 4810 // note: we don't update scan parameters or modify ongoing connection attempts 4811 #endif 4812 } 4813 4814 #endif 4815 4816 uint8_t gap_disconnect(hci_con_handle_t handle){ 4817 hci_connection_t * conn = hci_connection_for_handle(handle); 4818 if (!conn){ 4819 hci_emit_disconnection_complete(handle, 0); 4820 return 0; 4821 } 4822 // ignore if already disconnected 4823 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4824 return 0; 4825 } 4826 conn->state = SEND_DISCONNECT; 4827 hci_run(); 4828 return 0; 4829 } 4830 4831 int gap_read_rssi(hci_con_handle_t con_handle){ 4832 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 4833 if (hci_connection == NULL) return 0; 4834 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 4835 hci_run(); 4836 return 1; 4837 } 4838 4839 /** 4840 * @brief Get connection type 4841 * @param con_handle 4842 * @result connection_type 4843 */ 4844 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4845 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4846 if (!conn) return GAP_CONNECTION_INVALID; 4847 switch (conn->address_type){ 4848 case BD_ADDR_TYPE_LE_PUBLIC: 4849 case BD_ADDR_TYPE_LE_RANDOM: 4850 return GAP_CONNECTION_LE; 4851 case BD_ADDR_TYPE_SCO: 4852 return GAP_CONNECTION_SCO; 4853 case BD_ADDR_TYPE_ACL: 4854 return GAP_CONNECTION_ACL; 4855 default: 4856 return GAP_CONNECTION_INVALID; 4857 } 4858 } 4859 4860 #ifdef ENABLE_BLE 4861 4862 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){ 4863 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4864 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4865 4866 conn->le_phy_update_all_phys = all_phys; 4867 conn->le_phy_update_tx_phys = tx_phys; 4868 conn->le_phy_update_rx_phys = rx_phys; 4869 conn->le_phy_update_phy_options = phy_options; 4870 4871 hci_run(); 4872 4873 return 0; 4874 } 4875 4876 #ifdef ENABLE_LE_CENTRAL 4877 /** 4878 * @brief Auto Connection Establishment - Start Connecting to device 4879 * @param address_typ 4880 * @param address 4881 * @returns 0 if ok 4882 */ 4883 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4884 // check capacity 4885 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4886 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4887 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4888 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4889 entry->address_type = address_type; 4890 (void)memcpy(entry->address, address, 6); 4891 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4892 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4893 hci_run(); 4894 return 0; 4895 } 4896 4897 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4898 btstack_linked_list_iterator_t it; 4899 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4900 while (btstack_linked_list_iterator_has_next(&it)){ 4901 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4902 if (entry->address_type != address_type) continue; 4903 if (memcmp(entry->address, address, 6) != 0) continue; 4904 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4905 // remove from controller if already present 4906 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4907 continue; 4908 } 4909 // direclty remove entry from whitelist 4910 btstack_linked_list_iterator_remove(&it); 4911 btstack_memory_whitelist_entry_free(entry); 4912 } 4913 } 4914 4915 /** 4916 * @brief Auto Connection Establishment - Stop Connecting to device 4917 * @param address_typ 4918 * @param address 4919 * @returns 0 if ok 4920 */ 4921 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4922 hci_remove_from_whitelist(address_type, address); 4923 hci_run(); 4924 return 0; 4925 } 4926 4927 /** 4928 * @brief Auto Connection Establishment - Stop everything 4929 * @note Convenience function to stop all active auto connection attempts 4930 */ 4931 void gap_auto_connection_stop_all(void){ 4932 btstack_linked_list_iterator_t it; 4933 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4934 while (btstack_linked_list_iterator_has_next(&it)){ 4935 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4936 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4937 // remove from controller if already present 4938 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4939 continue; 4940 } 4941 // directly remove entry from whitelist 4942 btstack_linked_list_iterator_remove(&it); 4943 btstack_memory_whitelist_entry_free(entry); 4944 } 4945 hci_run(); 4946 } 4947 4948 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 4949 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4950 if (!conn) return 0; 4951 return conn->le_connection_interval; 4952 } 4953 #endif 4954 #endif 4955 4956 #ifdef ENABLE_CLASSIC 4957 /** 4958 * @brief Set Extended Inquiry Response data 4959 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4960 * @note has to be done before stack starts up 4961 */ 4962 void gap_set_extended_inquiry_response(const uint8_t * data){ 4963 hci_stack->eir_data = data; 4964 } 4965 4966 /** 4967 * @brief Start GAP Classic Inquiry 4968 * @param duration in 1.28s units 4969 * @return 0 if ok 4970 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4971 */ 4972 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4973 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 4974 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4975 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 4976 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4977 } 4978 hci_stack->inquiry_state = duration_in_1280ms_units; 4979 hci_run(); 4980 return 0; 4981 } 4982 4983 /** 4984 * @brief Stop GAP Classic Inquiry 4985 * @returns 0 if ok 4986 */ 4987 int gap_inquiry_stop(void){ 4988 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 4989 // emit inquiry complete event, before it even started 4990 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4991 hci_emit_event(event, sizeof(event), 1); 4992 return 0; 4993 } 4994 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4995 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4996 hci_run(); 4997 return 0; 4998 } 4999 5000 5001 /** 5002 * @brief Remote Name Request 5003 * @param addr 5004 * @param page_scan_repetition_mode 5005 * @param clock_offset only used when bit 15 is set 5006 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5007 */ 5008 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5009 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5010 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5011 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5012 hci_stack->remote_name_clock_offset = clock_offset; 5013 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5014 hci_run(); 5015 return 0; 5016 } 5017 5018 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 5019 hci_stack->gap_pairing_state = state; 5020 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5021 hci_run(); 5022 return 0; 5023 } 5024 5025 /** 5026 * @brief Legacy Pairing Pin Code Response 5027 * @param addr 5028 * @param pin 5029 * @return 0 if ok 5030 */ 5031 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 5032 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5033 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 5034 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5035 } 5036 5037 /** 5038 * @brief Abort Legacy Pairing 5039 * @param addr 5040 * @param pin 5041 * @return 0 if ok 5042 */ 5043 int gap_pin_code_negative(bd_addr_t addr){ 5044 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5045 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5046 } 5047 5048 /** 5049 * @brief SSP Passkey Response 5050 * @param addr 5051 * @param passkey 5052 * @return 0 if ok 5053 */ 5054 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5055 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5056 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5057 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5058 } 5059 5060 /** 5061 * @brief Abort SSP Passkey Entry/Pairing 5062 * @param addr 5063 * @param pin 5064 * @return 0 if ok 5065 */ 5066 int gap_ssp_passkey_negative(bd_addr_t addr){ 5067 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5068 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5069 } 5070 5071 /** 5072 * @brief Accept SSP Numeric Comparison 5073 * @param addr 5074 * @param passkey 5075 * @return 0 if ok 5076 */ 5077 int gap_ssp_confirmation_response(bd_addr_t addr){ 5078 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5079 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5080 } 5081 5082 /** 5083 * @brief Abort SSP Numeric Comparison/Pairing 5084 * @param addr 5085 * @param pin 5086 * @return 0 if ok 5087 */ 5088 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5089 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5090 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5091 } 5092 5093 /** 5094 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5095 * @param inquiry_mode see bluetooth_defines.h 5096 */ 5097 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5098 hci_stack->inquiry_mode = mode; 5099 } 5100 5101 /** 5102 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5103 */ 5104 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5105 hci_stack->sco_voice_setting = voice_setting; 5106 } 5107 5108 /** 5109 * @brief Get SCO Voice Setting 5110 * @return current voice setting 5111 */ 5112 uint16_t hci_get_sco_voice_setting(void){ 5113 return hci_stack->sco_voice_setting; 5114 } 5115 5116 static int hci_have_usb_transport(void){ 5117 if (!hci_stack->hci_transport) return 0; 5118 const char * transport_name = hci_stack->hci_transport->name; 5119 if (!transport_name) return 0; 5120 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5121 } 5122 5123 /** @brief Get SCO packet length for current SCO Voice setting 5124 * @note Using SCO packets of the exact length is required for USB transfer 5125 * @return Length of SCO packets in bytes (not audio frames) 5126 */ 5127 int hci_get_sco_packet_length(void){ 5128 int sco_packet_length = 0; 5129 5130 #ifdef ENABLE_SCO_OVER_HCI 5131 5132 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5133 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5134 5135 if (hci_have_usb_transport()){ 5136 // see Core Spec for H2 USB Transfer. 5137 // 3 byte SCO header + 24 bytes per connection 5138 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5139 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5140 } else { 5141 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5142 sco_packet_length = 3 + 60 * multiplier; 5143 // assert that it still fits inside an SCO buffer 5144 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5145 sco_packet_length = 3 + 60; 5146 } 5147 } 5148 #endif 5149 return sco_packet_length; 5150 } 5151 5152 /** 5153 * @brief Sets the master/slave policy 5154 * @param policy (0: attempt to become master, 1: let connecting device decide) 5155 */ 5156 void hci_set_master_slave_policy(uint8_t policy){ 5157 hci_stack->master_slave_policy = policy; 5158 } 5159 5160 #endif 5161 5162 HCI_STATE hci_get_state(void){ 5163 return hci_stack->state; 5164 } 5165 5166 #ifdef ENABLE_CLASSIC 5167 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5168 hci_stack->gap_classic_accept_callback = accept_callback; 5169 } 5170 #endif 5171 5172 /** 5173 * @brief Set callback for Bluetooth Hardware Error 5174 */ 5175 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5176 hci_stack->hardware_error_callback = fn; 5177 } 5178 5179 void hci_disconnect_all(void){ 5180 btstack_linked_list_iterator_t it; 5181 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5182 while (btstack_linked_list_iterator_has_next(&it)){ 5183 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5184 if (con->state == SENT_DISCONNECT) continue; 5185 con->state = SEND_DISCONNECT; 5186 } 5187 hci_run(); 5188 } 5189 5190 uint16_t hci_get_manufacturer(void){ 5191 return hci_stack->manufacturer; 5192 } 5193 5194 #ifdef ENABLE_BLE 5195 5196 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5197 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5198 if (!hci_con) return NULL; 5199 return &hci_con->sm_connection; 5200 } 5201 5202 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5203 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5204 5205 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5206 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5207 if (hci_connection == NULL) return 0; 5208 if (hci_is_le_connection(hci_connection)){ 5209 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5210 if (sm_conn->sm_connection_encrypted) { 5211 return sm_conn->sm_actual_encryption_key_size; 5212 } 5213 } 5214 #ifdef ENABLE_CLASSIC 5215 else { 5216 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5217 return hci_connection->encryption_key_size; 5218 } 5219 } 5220 #endif 5221 return 0; 5222 } 5223 5224 int gap_authenticated(hci_con_handle_t con_handle){ 5225 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5226 if (hci_connection == NULL) return 0; 5227 5228 switch (hci_connection->address_type){ 5229 case BD_ADDR_TYPE_LE_PUBLIC: 5230 case BD_ADDR_TYPE_LE_RANDOM: 5231 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5232 return hci_connection->sm_connection.sm_connection_authenticated; 5233 #ifdef ENABLE_CLASSIC 5234 case BD_ADDR_TYPE_SCO: 5235 case BD_ADDR_TYPE_ACL: 5236 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5237 #endif 5238 default: 5239 return 0; 5240 } 5241 } 5242 5243 int gap_secure_connection(hci_con_handle_t con_handle){ 5244 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5245 if (hci_connection == NULL) return 0; 5246 5247 switch (hci_connection->address_type){ 5248 case BD_ADDR_TYPE_LE_PUBLIC: 5249 case BD_ADDR_TYPE_LE_RANDOM: 5250 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5251 return hci_connection->sm_connection.sm_connection_sc; 5252 #ifdef ENABLE_CLASSIC 5253 case BD_ADDR_TYPE_SCO: 5254 case BD_ADDR_TYPE_ACL: 5255 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5256 #endif 5257 default: 5258 return 0; 5259 } 5260 } 5261 5262 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5263 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5264 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5265 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5266 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5267 return sm_conn->sm_connection_authorization_state; 5268 } 5269 #endif 5270 5271 #ifdef ENABLE_CLASSIC 5272 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){ 5273 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5274 if (!conn) return GAP_CONNECTION_INVALID; 5275 conn->sniff_min_interval = sniff_min_interval; 5276 conn->sniff_max_interval = sniff_max_interval; 5277 conn->sniff_attempt = sniff_attempt; 5278 conn->sniff_timeout = sniff_timeout; 5279 hci_run(); 5280 return 0; 5281 } 5282 5283 /** 5284 * @brief Exit Sniff mode 5285 * @param con_handle 5286 @ @return 0 if ok 5287 */ 5288 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5289 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5290 if (!conn) return GAP_CONNECTION_INVALID; 5291 conn->sniff_min_interval = 0xffff; 5292 hci_run(); 5293 return 0; 5294 } 5295 #endif 5296 5297 void hci_halting_defer(void){ 5298 if (hci_stack->state != HCI_STATE_HALTING) return; 5299 switch (hci_stack->substate){ 5300 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5301 case HCI_HALTING_CLOSE: 5302 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5303 break; 5304 default: 5305 break; 5306 } 5307 } 5308