1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #endif 63 64 #include <stdarg.h> 65 #include <string.h> 66 #include <stdio.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 #define HCI_RESET_RESEND_TIMEOUT_MS 200 98 99 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 100 #ifndef GAP_INQUIRY_MAX_NAME_LEN 101 #define GAP_INQUIRY_MAX_NAME_LEN 32 102 #endif 103 104 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 105 #define GAP_INQUIRY_DURATION_MIN 0x01 106 #define GAP_INQUIRY_DURATION_MAX 0x30 107 #define GAP_INQUIRY_STATE_ACTIVE 0x80 108 #define GAP_INQUIRY_STATE_IDLE 0 109 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 110 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 111 112 // GAP Remote Name Request 113 #define GAP_REMOTE_NAME_STATE_IDLE 0 114 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 115 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 116 117 // GAP Pairing 118 #define GAP_PAIRING_STATE_IDLE 0 119 #define GAP_PAIRING_STATE_SEND_PIN 1 120 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 121 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 122 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 123 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 124 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 125 126 127 // prototypes 128 #ifdef ENABLE_CLASSIC 129 static void hci_update_scan_enable(void); 130 static void hci_emit_discoverable_enabled(uint8_t enabled); 131 static int hci_local_ssp_activated(void); 132 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 133 static void hci_notify_if_sco_can_send_now(void); 134 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 135 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 136 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 137 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 138 static void hci_connection_timestamp(hci_connection_t *connection); 139 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 140 static void gap_inquiry_explode(uint8_t * packet); 141 #endif 142 143 static int hci_power_control_on(void); 144 static void hci_power_control_off(void); 145 static void hci_state_reset(void); 146 static void hci_emit_transport_packet_sent(void); 147 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 148 static void hci_emit_nr_connections_changed(void); 149 static void hci_emit_hci_open_failed(void); 150 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 151 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 152 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 153 static void hci_run(void); 154 static int hci_is_le_connection(hci_connection_t * connection); 155 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 156 157 #ifdef ENABLE_CLASSIC 158 static int hci_have_usb_transport(void); 159 #endif 160 161 #ifdef ENABLE_BLE 162 #ifdef ENABLE_LE_CENTRAL 163 // called from test/ble_client/advertising_data_parser.c 164 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 165 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 166 static hci_connection_t * gap_get_outgoing_connection(void); 167 #endif 168 #endif 169 170 // the STACK is here 171 #ifndef HAVE_MALLOC 172 static hci_stack_t hci_stack_static; 173 #endif 174 static hci_stack_t * hci_stack = NULL; 175 176 #ifdef ENABLE_CLASSIC 177 // default name 178 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 179 180 // test helper 181 static uint8_t disable_l2cap_timeouts = 0; 182 #endif 183 184 /** 185 * create connection for given address 186 * 187 * @return connection OR NULL, if no memory left 188 */ 189 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 190 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 191 hci_connection_t * conn = btstack_memory_hci_connection_get(); 192 if (!conn) return NULL; 193 bd_addr_copy(conn->address, addr); 194 conn->address_type = addr_type; 195 conn->con_handle = 0xffff; 196 conn->authentication_flags = AUTH_FLAGS_NONE; 197 conn->bonding_flags = 0; 198 conn->requested_security_level = LEVEL_0; 199 #ifdef ENABLE_CLASSIC 200 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 201 btstack_run_loop_set_timer_context(&conn->timeout, conn); 202 hci_connection_timestamp(conn); 203 #endif 204 conn->acl_recombination_length = 0; 205 conn->acl_recombination_pos = 0; 206 conn->num_packets_sent = 0; 207 208 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 209 #ifdef ENABLE_BLE 210 conn->le_phy_update_all_phys = 0xff; 211 #endif 212 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 213 return conn; 214 } 215 216 217 /** 218 * get le connection parameter range 219 * 220 * @return le connection parameter range struct 221 */ 222 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 223 *range = hci_stack->le_connection_parameter_range; 224 } 225 226 /** 227 * set le connection parameter range 228 * 229 */ 230 231 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 232 hci_stack->le_connection_parameter_range = *range; 233 } 234 235 /** 236 * @brief Test if connection parameters are inside in existing rage 237 * @param conn_interval_min (unit: 1.25ms) 238 * @param conn_interval_max (unit: 1.25ms) 239 * @param conn_latency 240 * @param supervision_timeout (unit: 10ms) 241 * @returns 1 if included 242 */ 243 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 244 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 245 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 246 247 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 248 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 249 250 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 251 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 252 253 return 1; 254 } 255 256 /** 257 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 258 * @note: default: 1 259 * @param max_peripheral_connections 260 */ 261 #ifdef ENABLE_LE_PERIPHERAL 262 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 263 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 264 } 265 #endif 266 267 /** 268 * get hci connections iterator 269 * 270 * @return hci connections iterator 271 */ 272 273 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 274 btstack_linked_list_iterator_init(it, &hci_stack->connections); 275 } 276 277 /** 278 * get connection for a given handle 279 * 280 * @return connection OR NULL, if not found 281 */ 282 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 283 btstack_linked_list_iterator_t it; 284 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 285 while (btstack_linked_list_iterator_has_next(&it)){ 286 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 287 if ( item->con_handle == con_handle ) { 288 return item; 289 } 290 } 291 return NULL; 292 } 293 294 /** 295 * get connection for given address 296 * 297 * @return connection OR NULL, if not found 298 */ 299 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 300 btstack_linked_list_iterator_t it; 301 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 302 while (btstack_linked_list_iterator_has_next(&it)){ 303 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 304 if (connection->address_type != addr_type) continue; 305 if (memcmp(addr, connection->address, 6) != 0) continue; 306 return connection; 307 } 308 return NULL; 309 } 310 311 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 312 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 313 } 314 315 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 316 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 317 } 318 319 #ifdef ENABLE_CLASSIC 320 321 #ifdef ENABLE_SCO_OVER_HCI 322 static int hci_number_sco_connections(void){ 323 int connections = 0; 324 btstack_linked_list_iterator_t it; 325 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 326 while (btstack_linked_list_iterator_has_next(&it)){ 327 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 328 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 329 connections++; 330 } 331 return connections; 332 } 333 #endif 334 335 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 336 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 337 #ifdef HAVE_EMBEDDED_TICK 338 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 339 // connections might be timed out 340 hci_emit_l2cap_check_timeout(connection); 341 } 342 #else 343 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 344 // connections might be timed out 345 hci_emit_l2cap_check_timeout(connection); 346 } 347 #endif 348 } 349 350 static void hci_connection_timestamp(hci_connection_t *connection){ 351 #ifdef HAVE_EMBEDDED_TICK 352 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 353 #else 354 connection->timestamp = btstack_run_loop_get_time_ms(); 355 #endif 356 } 357 358 /** 359 * add authentication flags and reset timer 360 * @note: assumes classic connection 361 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 362 */ 363 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 364 bd_addr_t addr; 365 reverse_bd_addr(bd_addr, addr); 366 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 367 if (conn) { 368 connectionSetAuthenticationFlags(conn, flags); 369 hci_connection_timestamp(conn); 370 } 371 } 372 373 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 374 hci_connection_t * conn = hci_connection_for_handle(handle); 375 if (!conn) return 0; 376 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 377 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 378 return 0; 379 } 380 381 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 382 if (!hci_stack->link_key_db) return; 383 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 384 hci_stack->link_key_db->delete_link_key(addr); 385 } 386 387 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 388 if (!hci_stack->link_key_db) return; 389 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 390 hci_stack->link_key_db->put_link_key(addr, link_key, type); 391 } 392 393 void gap_delete_all_link_keys(void){ 394 bd_addr_t addr; 395 link_key_t link_key; 396 link_key_type_t type; 397 btstack_link_key_iterator_t it; 398 int ok = gap_link_key_iterator_init(&it); 399 if (!ok) { 400 log_error("could not initialize iterator"); 401 return; 402 } 403 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 404 gap_drop_link_key_for_bd_addr(addr); 405 } 406 gap_link_key_iterator_done(&it); 407 } 408 409 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 410 if (!hci_stack->link_key_db) return 0; 411 if (!hci_stack->link_key_db->iterator_init) return 0; 412 return hci_stack->link_key_db->iterator_init(it); 413 } 414 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 415 if (!hci_stack->link_key_db) return 0; 416 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 417 } 418 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 419 if (!hci_stack->link_key_db) return; 420 hci_stack->link_key_db->iterator_done(it); 421 } 422 #endif 423 424 static int hci_is_le_connection(hci_connection_t * connection){ 425 switch (connection->address_type){ 426 case BD_ADDR_TYPE_LE_PUBLIC: 427 case BD_ADDR_TYPE_LE_RANDOM: 428 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 429 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 430 return 1; 431 default: 432 return 0; 433 } 434 } 435 436 /** 437 * count connections 438 */ 439 static int nr_hci_connections(void){ 440 int count = 0; 441 btstack_linked_item_t *it; 442 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 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 ; 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 (1){ 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 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 874 conn->acl_recombination_pos += acl_length; 875 876 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 877 // conn->acl_recombination_pos, conn->acl_recombination_length); 878 879 // forward complete L2CAP packet if complete. 880 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4 + 4)){ // pos already incl. ACL header 881 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 882 // reset recombination buffer 883 conn->acl_recombination_length = 0; 884 conn->acl_recombination_pos = 0; 885 } 886 break; 887 888 case 0x02: { // first fragment 889 890 // sanity check 891 if (conn->acl_recombination_pos) { 892 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 893 conn->acl_recombination_pos = 0; 894 } 895 896 // peek into L2CAP packet! 897 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 898 899 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 900 901 // compare fragment size to L2CAP packet size 902 if (acl_length >= (l2cap_length + 4)){ 903 // forward fragment as L2CAP packet 904 hci_emit_acl_packet(packet, acl_length + 4); 905 } else { 906 907 if (acl_length > HCI_ACL_BUFFER_SIZE){ 908 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 909 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 910 return; 911 } 912 913 // store first fragment and tweak acl length for complete package 914 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 915 conn->acl_recombination_pos = acl_length + 4; 916 conn->acl_recombination_length = l2cap_length; 917 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 918 } 919 break; 920 921 } 922 default: 923 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 924 return; 925 } 926 927 // execute main loop 928 hci_run(); 929 } 930 931 static void hci_shutdown_connection(hci_connection_t *conn){ 932 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 933 934 #ifdef ENABLE_CLASSIC 935 #ifdef ENABLE_SCO_OVER_HCI 936 int addr_type = conn->address_type; 937 #endif 938 #endif 939 940 btstack_run_loop_remove_timer(&conn->timeout); 941 942 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 943 btstack_memory_hci_connection_free( conn ); 944 945 // now it's gone 946 hci_emit_nr_connections_changed(); 947 948 #ifdef ENABLE_CLASSIC 949 #ifdef ENABLE_SCO_OVER_HCI 950 // update SCO 951 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 952 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 953 } 954 #endif 955 #endif 956 } 957 958 #ifdef ENABLE_CLASSIC 959 960 static const uint16_t packet_type_sizes[] = { 961 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 962 HCI_ACL_DH1_SIZE, 0, 0, 0, 963 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 964 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 965 }; 966 static const uint8_t packet_type_feature_requirement_bit[] = { 967 0, // 3 slot packets 968 1, // 5 slot packets 969 25, // EDR 2 mpbs 970 26, // EDR 3 mbps 971 39, // 3 slot EDR packts 972 40, // 5 slot EDR packet 973 }; 974 static const uint16_t packet_type_feature_packet_mask[] = { 975 0x0f00, // 3 slot packets 976 0xf000, // 5 slot packets 977 0x1102, // EDR 2 mpbs 978 0x2204, // EDR 3 mbps 979 0x0300, // 3 slot EDR packts 980 0x3000, // 5 slot EDR packet 981 }; 982 983 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 984 // enable packet types based on size 985 uint16_t packet_types = 0; 986 unsigned int i; 987 for (i=0;i<16;i++){ 988 if (packet_type_sizes[i] == 0) continue; 989 if (packet_type_sizes[i] <= buffer_size){ 990 packet_types |= 1 << i; 991 } 992 } 993 // disable packet types due to missing local supported features 994 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 995 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 996 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 997 if (feature_set) continue; 998 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 999 packet_types &= ~packet_type_feature_packet_mask[i]; 1000 } 1001 // flip bits for "may not be used" 1002 packet_types ^= 0x3306; 1003 return packet_types; 1004 } 1005 1006 uint16_t hci_usable_acl_packet_types(void){ 1007 return hci_stack->packet_types; 1008 } 1009 #endif 1010 1011 uint8_t* hci_get_outgoing_packet_buffer(void){ 1012 // hci packet buffer is >= acl data packet length 1013 return hci_stack->hci_packet_buffer; 1014 } 1015 1016 uint16_t hci_max_acl_data_packet_length(void){ 1017 return hci_stack->acl_data_packet_length; 1018 } 1019 1020 #ifdef ENABLE_CLASSIC 1021 int hci_extended_sco_link_supported(void){ 1022 // No. 31, byte 3, bit 7 1023 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1024 } 1025 #endif 1026 1027 int hci_non_flushable_packet_boundary_flag_supported(void){ 1028 // No. 54, byte 6, bit 6 1029 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 1030 } 1031 1032 static int gap_ssp_supported(void){ 1033 // No. 51, byte 6, bit 3 1034 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 1035 } 1036 1037 static int hci_classic_supported(void){ 1038 #ifdef ENABLE_CLASSIC 1039 // No. 37, byte 4, bit 5, = No BR/EDR Support 1040 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1041 #else 1042 return 0; 1043 #endif 1044 } 1045 1046 static int hci_le_supported(void){ 1047 #ifdef ENABLE_BLE 1048 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1049 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1050 #else 1051 return 0; 1052 #endif 1053 } 1054 1055 #ifdef ENABLE_BLE 1056 1057 /** 1058 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1059 */ 1060 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1061 *addr_type = hci_stack->le_own_addr_type; 1062 if (hci_stack->le_own_addr_type){ 1063 memcpy(addr, hci_stack->le_random_address, 6); 1064 } else { 1065 memcpy(addr, hci_stack->local_bd_addr, 6); 1066 } 1067 } 1068 1069 #ifdef ENABLE_LE_CENTRAL 1070 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1071 1072 int offset = 3; 1073 int num_reports = packet[offset]; 1074 offset += 1; 1075 1076 int i; 1077 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1078 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1079 for (i=0; (i<num_reports) && (offset < size);i++){ 1080 // sanity checks on data_length: 1081 uint8_t data_length = packet[offset + 8]; 1082 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1083 if ((offset + 9 + data_length + 1) > size) return; 1084 // setup event 1085 uint8_t event_size = 10 + data_length; 1086 int pos = 0; 1087 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1088 event[pos++] = event_size; 1089 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 1090 offset += 8; 1091 pos += 8; 1092 event[pos++] = packet[offset + 1 + data_length]; // rssi 1093 event[pos++] = data_length; 1094 offset++; 1095 memcpy(&event[pos], &packet[offset], data_length); 1096 pos += data_length; 1097 offset += data_length + 1; // rssi 1098 hci_emit_event(event, pos, 1); 1099 } 1100 } 1101 #endif 1102 #endif 1103 1104 #ifdef ENABLE_BLE 1105 #ifdef ENABLE_LE_PERIPHERAL 1106 static void hci_reenable_advertisements_if_needed(void){ 1107 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1108 // get number of active le slave connections 1109 int num_slave_connections = 0; 1110 btstack_linked_list_iterator_t it; 1111 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1112 while (btstack_linked_list_iterator_has_next(&it)){ 1113 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1114 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1115 if (con->state != OPEN) continue; 1116 if (con->role != HCI_ROLE_SLAVE) continue; 1117 if (!hci_is_le_connection(con)) continue; 1118 num_slave_connections++; 1119 } 1120 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1121 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1122 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1123 } 1124 } 1125 } 1126 #endif 1127 #endif 1128 1129 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1130 1131 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1132 if (!hci_stack->config) return 0; 1133 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1134 // Limit baud rate for Broadcom chipsets to 3 mbps 1135 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1136 baud_rate = 3000000; 1137 } 1138 return baud_rate; 1139 } 1140 1141 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1142 UNUSED(ds); 1143 1144 switch (hci_stack->substate){ 1145 case HCI_INIT_W4_SEND_RESET: 1146 log_info("Resend HCI Reset"); 1147 hci_stack->substate = HCI_INIT_SEND_RESET; 1148 hci_stack->num_cmd_packets = 1; 1149 hci_run(); 1150 break; 1151 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1152 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1153 if (hci_stack->hci_transport->reset_link){ 1154 hci_stack->hci_transport->reset_link(); 1155 } 1156 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1157 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1158 log_info("Resend HCI Reset - CSR Warm Boot"); 1159 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1160 hci_stack->num_cmd_packets = 1; 1161 hci_run(); 1162 break; 1163 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1164 if (hci_stack->hci_transport->set_baudrate){ 1165 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1166 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1167 hci_stack->hci_transport->set_baudrate(baud_rate); 1168 } 1169 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1170 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1171 if (hci_stack->hci_transport->reset_link){ 1172 log_info("Link Reset"); 1173 hci_stack->hci_transport->reset_link(); 1174 } 1175 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1176 hci_run(); 1177 } 1178 break; 1179 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1180 // otherwise continue 1181 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1182 hci_send_cmd(&hci_read_local_supported_commands); 1183 break; 1184 default: 1185 break; 1186 } 1187 } 1188 #endif 1189 1190 static void hci_initializing_next_state(void){ 1191 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1192 } 1193 1194 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_PERIPHERAL) 1195 static void hci_replace_bd_addr_placeholder(uint8_t * data, uint16_t size){ 1196 const int bd_addr_string_len = 17; 1197 int i = 0; 1198 while (i < (size - bd_addr_string_len)){ 1199 if (memcmp(&data[i], "00:00:00:00:00:00", bd_addr_string_len)) { 1200 i++; 1201 continue; 1202 } 1203 // set real address 1204 memcpy(&data[i], bd_addr_to_str(hci_stack->local_bd_addr), bd_addr_string_len); 1205 i += bd_addr_string_len; 1206 } 1207 } 1208 #endif 1209 1210 // assumption: hci_can_send_command_packet_now() == true 1211 static void hci_initializing_run(void){ 1212 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1213 switch (hci_stack->substate){ 1214 case HCI_INIT_SEND_RESET: 1215 hci_state_reset(); 1216 1217 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1218 // prepare reset if command complete not received in 100ms 1219 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1220 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1221 btstack_run_loop_add_timer(&hci_stack->timeout); 1222 #endif 1223 // send command 1224 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1225 hci_send_cmd(&hci_reset); 1226 break; 1227 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1228 hci_send_cmd(&hci_read_local_version_information); 1229 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1230 break; 1231 case HCI_INIT_SEND_READ_LOCAL_NAME: 1232 hci_send_cmd(&hci_read_local_name); 1233 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1234 break; 1235 1236 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1237 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1238 hci_state_reset(); 1239 // prepare reset if command complete not received in 100ms 1240 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1241 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1242 btstack_run_loop_add_timer(&hci_stack->timeout); 1243 // send command 1244 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1245 hci_send_cmd(&hci_reset); 1246 break; 1247 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1248 hci_state_reset(); 1249 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1250 hci_send_cmd(&hci_reset); 1251 break; 1252 case HCI_INIT_SEND_BAUD_CHANGE: { 1253 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1254 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1255 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1256 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1257 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1258 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1259 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1260 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1261 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1262 btstack_run_loop_add_timer(&hci_stack->timeout); 1263 } 1264 break; 1265 } 1266 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1267 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1268 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1269 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1270 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1271 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1272 break; 1273 } 1274 case HCI_INIT_CUSTOM_INIT: 1275 // Custom initialization 1276 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1277 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1278 int send_cmd = 0; 1279 switch (hci_stack->chipset_result){ 1280 case BTSTACK_CHIPSET_VALID_COMMAND: 1281 send_cmd = 1; 1282 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1283 break; 1284 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1285 send_cmd = 1; 1286 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1287 log_info("CSR Warm Boot"); 1288 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1289 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1290 btstack_run_loop_add_timer(&hci_stack->timeout); 1291 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1292 && hci_stack->config 1293 && hci_stack->chipset 1294 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1295 && hci_stack->hci_transport->set_baudrate 1296 && hci_transport_uart_get_main_baud_rate()){ 1297 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1298 } else { 1299 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1300 } 1301 break; 1302 default: 1303 break; 1304 } 1305 1306 if (send_cmd){ 1307 int size = 3 + hci_stack->hci_packet_buffer[2]; 1308 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1309 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1310 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1311 break; 1312 } 1313 log_info("Init script done"); 1314 1315 // Init script download on Broadcom chipsets causes: 1316 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1317 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1318 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1319 1320 // - baud rate to reset, restore UART baud rate if needed 1321 int need_baud_change = hci_stack->config 1322 && hci_stack->chipset 1323 && hci_stack->chipset->set_baudrate_command 1324 && hci_stack->hci_transport->set_baudrate 1325 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1326 if (need_baud_change) { 1327 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1328 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1329 hci_stack->hci_transport->set_baudrate(baud_rate); 1330 } 1331 1332 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1333 // -> Work around: wait a few milliseconds here. 1334 log_info("BCM delay after init script"); 1335 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1336 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1337 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1338 btstack_run_loop_add_timer(&hci_stack->timeout); 1339 break; 1340 } 1341 } 1342 // otherwise continue 1343 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1344 hci_send_cmd(&hci_read_local_supported_commands); 1345 break; 1346 case HCI_INIT_SET_BD_ADDR: 1347 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1348 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1349 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1350 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1351 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1352 break; 1353 #endif 1354 1355 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1356 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1357 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1358 hci_send_cmd(&hci_read_local_supported_commands); 1359 break; 1360 case HCI_INIT_READ_BD_ADDR: 1361 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1362 hci_send_cmd(&hci_read_bd_addr); 1363 break; 1364 case HCI_INIT_READ_BUFFER_SIZE: 1365 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1366 hci_send_cmd(&hci_read_buffer_size); 1367 break; 1368 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1369 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1370 hci_send_cmd(&hci_read_local_supported_features); 1371 break; 1372 1373 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1374 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1375 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1376 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1377 break; 1378 case HCI_INIT_HOST_BUFFER_SIZE: 1379 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1380 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1381 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1382 break; 1383 #endif 1384 1385 case HCI_INIT_SET_EVENT_MASK: 1386 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1387 if (hci_le_supported()){ 1388 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1389 } else { 1390 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1391 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1392 } 1393 break; 1394 1395 #ifdef ENABLE_CLASSIC 1396 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1397 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1398 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1399 break; 1400 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1401 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1402 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1403 break; 1404 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1405 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1406 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1407 break; 1408 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1409 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1410 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1411 break; 1412 case HCI_INIT_WRITE_LOCAL_NAME: { 1413 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1414 hci_reserve_packet_buffer(); 1415 uint8_t * packet = hci_stack->hci_packet_buffer; 1416 // construct HCI Command and send 1417 uint16_t opcode = hci_write_local_name.opcode; 1418 hci_stack->last_cmd_opcode = opcode; 1419 packet[0] = opcode & 0xff; 1420 packet[1] = opcode >> 8; 1421 packet[2] = DEVICE_NAME_LEN; 1422 memset(&packet[3], 0, DEVICE_NAME_LEN); 1423 memcpy(&packet[3], hci_stack->local_name, strlen(hci_stack->local_name)); 1424 // expand '00:00:00:00:00:00' in name with bd_addr 1425 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1426 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1427 break; 1428 } 1429 case HCI_INIT_WRITE_EIR_DATA: { 1430 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1431 hci_reserve_packet_buffer(); 1432 uint8_t * packet = hci_stack->hci_packet_buffer; 1433 // construct HCI Command and send 1434 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1435 hci_stack->last_cmd_opcode = opcode; 1436 packet[0] = opcode & 0xff; 1437 packet[1] = opcode >> 8; 1438 packet[2] = 1 + 240; 1439 packet[3] = 0; // FEC not required 1440 if (hci_stack->eir_data){ 1441 memcpy(&packet[4], hci_stack->eir_data, 240); 1442 } else { 1443 memset(&packet[4], 0, 240); 1444 int name_len = strlen(hci_stack->local_name); 1445 packet[4] = name_len + 1; 1446 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1447 memcpy(&packet[6], hci_stack->local_name, name_len); 1448 } 1449 // expand '00:00:00:00:00:00' in name with bd_addr 1450 hci_replace_bd_addr_placeholder(&packet[4], 240); 1451 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1452 break; 1453 } 1454 case HCI_INIT_WRITE_INQUIRY_MODE: 1455 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1456 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1457 break; 1458 case HCI_INIT_WRITE_SCAN_ENABLE: 1459 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1460 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1461 break; 1462 // only sent if ENABLE_SCO_OVER_HCI is defined 1463 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1464 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1465 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1466 break; 1467 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1468 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1469 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1470 break; 1471 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1472 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1473 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1474 log_info("BCM: Route SCO data via HCI transport"); 1475 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1476 break; 1477 1478 #endif 1479 #ifdef ENABLE_BLE 1480 // LE INIT 1481 case HCI_INIT_LE_READ_BUFFER_SIZE: 1482 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1483 hci_send_cmd(&hci_le_read_buffer_size); 1484 break; 1485 case HCI_INIT_LE_SET_EVENT_MASK: 1486 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1487 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1488 break; 1489 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1490 // LE Supported Host = 1, Simultaneous Host = 0 1491 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1492 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1493 break; 1494 #endif 1495 1496 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1497 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1498 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1499 hci_send_cmd(&hci_le_read_maximum_data_length); 1500 break; 1501 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1502 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1503 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1504 break; 1505 #endif 1506 1507 #ifdef ENABLE_LE_CENTRAL 1508 case HCI_INIT_READ_WHITE_LIST_SIZE: 1509 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1510 hci_send_cmd(&hci_le_read_white_list_size); 1511 break; 1512 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1513 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1514 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1515 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); 1516 break; 1517 #endif 1518 default: 1519 return; 1520 } 1521 } 1522 1523 static void hci_init_done(void){ 1524 // done. tell the app 1525 log_info("hci_init_done -> HCI_STATE_WORKING"); 1526 hci_stack->state = HCI_STATE_WORKING; 1527 hci_emit_state(); 1528 hci_run(); 1529 } 1530 1531 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1532 1533 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1534 1535 uint8_t command_completed = 0; 1536 1537 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1538 uint16_t opcode = little_endian_read_16(packet,3); 1539 if (opcode == hci_stack->last_cmd_opcode){ 1540 command_completed = 1; 1541 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1542 } else { 1543 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1544 } 1545 } 1546 1547 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1548 uint8_t status = packet[2]; 1549 uint16_t opcode = little_endian_read_16(packet,4); 1550 if (opcode == hci_stack->last_cmd_opcode){ 1551 if (status){ 1552 command_completed = 1; 1553 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1554 } else { 1555 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1556 } 1557 } else { 1558 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1559 } 1560 } 1561 1562 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1563 1564 // Vendor == CSR 1565 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1566 // TODO: track actual command 1567 command_completed = 1; 1568 } 1569 1570 // Vendor == Toshiba 1571 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1572 // TODO: track actual command 1573 command_completed = 1; 1574 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1575 hci_stack->num_cmd_packets = 1; 1576 } 1577 1578 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1579 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1580 // 1581 // HCI Reset 1582 // Timeout 100 ms 1583 // HCI Reset 1584 // Command Complete Reset 1585 // HCI Read Local Version Information 1586 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1587 // hang... 1588 // 1589 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1590 if (!command_completed 1591 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1592 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1593 1594 uint16_t opcode = little_endian_read_16(packet,3); 1595 if (opcode == hci_reset.opcode){ 1596 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1597 return; 1598 } 1599 } 1600 1601 // CSR & H5 1602 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1603 if (!command_completed 1604 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1605 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1606 1607 uint16_t opcode = little_endian_read_16(packet,3); 1608 if (opcode == hci_reset.opcode){ 1609 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1610 return; 1611 } 1612 } 1613 1614 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1615 // fix: Correct substate and behave as command below 1616 if (command_completed){ 1617 switch (hci_stack->substate){ 1618 case HCI_INIT_SEND_RESET: 1619 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1620 break; 1621 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1622 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1623 break; 1624 default: 1625 break; 1626 } 1627 } 1628 1629 #endif 1630 1631 if (!command_completed) return; 1632 1633 int need_baud_change = 0; 1634 int need_addr_change = 0; 1635 1636 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1637 need_baud_change = hci_stack->config 1638 && hci_stack->chipset 1639 && hci_stack->chipset->set_baudrate_command 1640 && hci_stack->hci_transport->set_baudrate 1641 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1642 1643 need_addr_change = hci_stack->custom_bd_addr_set 1644 && hci_stack->chipset 1645 && hci_stack->chipset->set_bd_addr_command; 1646 #endif 1647 1648 switch(hci_stack->substate){ 1649 1650 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1651 case HCI_INIT_SEND_RESET: 1652 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1653 // fix: just correct substate and behave as command below 1654 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1655 btstack_run_loop_remove_timer(&hci_stack->timeout); 1656 break; 1657 case HCI_INIT_W4_SEND_RESET: 1658 btstack_run_loop_remove_timer(&hci_stack->timeout); 1659 break; 1660 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1661 log_info("Received local name, need baud change %d", need_baud_change); 1662 if (need_baud_change){ 1663 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1664 return; 1665 } 1666 // skip baud change 1667 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1668 return; 1669 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1670 // for STLC2500D, baud rate change already happened. 1671 // for others, baud rate gets changed now 1672 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1673 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1674 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1675 hci_stack->hci_transport->set_baudrate(baud_rate); 1676 } 1677 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1678 return; 1679 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1680 btstack_run_loop_remove_timer(&hci_stack->timeout); 1681 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1682 return; 1683 case HCI_INIT_W4_CUSTOM_INIT: 1684 // repeat custom init 1685 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1686 return; 1687 #else 1688 case HCI_INIT_W4_SEND_RESET: 1689 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1690 return ; 1691 #endif 1692 1693 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1694 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1695 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1696 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1697 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1698 return; 1699 } 1700 if (need_addr_change){ 1701 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1702 return; 1703 } 1704 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1705 return; 1706 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1707 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1708 if (need_baud_change){ 1709 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1710 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1711 hci_stack->hci_transport->set_baudrate(baud_rate); 1712 } 1713 if (need_addr_change){ 1714 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1715 return; 1716 } 1717 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1718 return; 1719 case HCI_INIT_W4_SET_BD_ADDR: 1720 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1721 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1722 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1723 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1724 return; 1725 } 1726 // skipping st warm boot 1727 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1728 return; 1729 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1730 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1731 return; 1732 #endif 1733 case HCI_INIT_W4_READ_BD_ADDR: 1734 // only read buffer size if supported 1735 if (hci_stack->local_supported_commands[0] & 0x01) { 1736 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1737 return; 1738 } 1739 // skipping read buffer size 1740 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1741 return; 1742 case HCI_INIT_W4_SET_EVENT_MASK: 1743 // skip Classic init commands for LE only chipsets 1744 if (!hci_classic_supported()){ 1745 #ifdef ENABLE_BLE 1746 if (hci_le_supported()){ 1747 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1748 return; 1749 } 1750 #endif 1751 log_error("Neither BR/EDR nor LE supported"); 1752 hci_init_done(); 1753 return; 1754 } 1755 if (!gap_ssp_supported()){ 1756 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1757 return; 1758 } 1759 break; 1760 #ifdef ENABLE_BLE 1761 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1762 // skip write le host if not supported (e.g. on LE only EM9301) 1763 if (hci_stack->local_supported_commands[0] & 0x02) break; 1764 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1765 return; 1766 1767 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1768 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1769 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1770 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1771 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1772 return; 1773 } 1774 // explicit fall through to reduce repetitions 1775 1776 #ifdef ENABLE_LE_CENTRAL 1777 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1778 #else 1779 hci_init_done(); 1780 #endif 1781 return; 1782 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1783 1784 #endif /* ENABLE_BLE */ 1785 1786 #ifdef ENABLE_SCO_OVER_HCI 1787 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1788 // skip write synchronous flow control if not supported 1789 if (hci_stack->local_supported_commands[0] & 0x04) break; 1790 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1791 // explicit fall through to reduce repetitions 1792 1793 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1794 // skip write default erroneous data reporting if not supported 1795 if (hci_stack->local_supported_commands[0] & 0x08) break; 1796 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1797 // explicit fall through to reduce repetitions 1798 1799 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1800 // skip bcm set sco pcm config on non-Broadcom chipsets 1801 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1802 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1803 // explicit fall through to reduce repetitions 1804 1805 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1806 if (!hci_le_supported()){ 1807 // SKIP LE init for Classic only configuration 1808 hci_init_done(); 1809 return; 1810 } 1811 break; 1812 1813 #else /* !ENABLE_SCO_OVER_HCI */ 1814 1815 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1816 #ifdef ENABLE_BLE 1817 if (hci_le_supported()){ 1818 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1819 return; 1820 } 1821 #endif 1822 // SKIP LE init for Classic only configuration 1823 hci_init_done(); 1824 return; 1825 #endif /* ENABLE_SCO_OVER_HCI */ 1826 1827 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1828 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1829 // Response to command before init done state -> init done 1830 case (HCI_INIT_DONE-1): 1831 hci_init_done(); 1832 return; 1833 #endif 1834 1835 default: 1836 break; 1837 } 1838 hci_initializing_next_state(); 1839 } 1840 1841 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1842 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1843 bd_addr_t bd_address; 1844 memcpy(&bd_address, conn->address, 6); 1845 1846 #ifdef ENABLE_CLASSIC 1847 // cache needed data 1848 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1849 #endif 1850 1851 // connection failed, remove entry 1852 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1853 btstack_memory_hci_connection_free( conn ); 1854 1855 #ifdef ENABLE_CLASSIC 1856 // notify client if dedicated bonding 1857 if (notify_dedicated_bonding_failed){ 1858 log_info("hci notify_dedicated_bonding_failed"); 1859 hci_emit_dedicated_bonding_result(bd_address, status); 1860 } 1861 1862 // if authentication error, also delete link key 1863 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1864 gap_drop_link_key_for_bd_addr(bd_address); 1865 } 1866 #endif 1867 } 1868 1869 static void event_handler(uint8_t *packet, int size){ 1870 1871 uint16_t event_length = packet[1]; 1872 1873 // assert packet is complete 1874 if (size != (event_length + 2)){ 1875 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1876 return; 1877 } 1878 1879 bd_addr_t addr; 1880 bd_addr_type_t addr_type; 1881 hci_con_handle_t handle; 1882 hci_connection_t * conn; 1883 int i; 1884 int create_connection_cmd; 1885 1886 #ifdef ENABLE_CLASSIC 1887 uint8_t link_type; 1888 #endif 1889 1890 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1891 1892 switch (hci_event_packet_get_type(packet)) { 1893 1894 case HCI_EVENT_COMMAND_COMPLETE: 1895 // get num cmd packets - limit to 1 to reduce complexity 1896 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1897 1898 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1899 if (packet[5]) break; 1900 // terminate, name 248 chars 1901 packet[6+248] = 0; 1902 log_info("local name: %s", &packet[6]); 1903 } 1904 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1905 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1906 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1907 uint16_t acl_len = little_endian_read_16(packet, 6); 1908 uint16_t sco_len = packet[8]; 1909 1910 // determine usable ACL/SCO payload size 1911 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1912 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1913 1914 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1915 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1916 1917 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1918 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1919 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1920 } 1921 } 1922 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_rssi)){ 1923 if (packet[5] == 0){ 1924 uint8_t event[5]; 1925 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 1926 event[1] = 3; 1927 memcpy(&event[2], &packet[6], 3); 1928 hci_emit_event(event, sizeof(event), 1); 1929 } 1930 } 1931 #ifdef ENABLE_BLE 1932 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1933 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1934 hci_stack->le_acl_packets_total_num = packet[8]; 1935 // determine usable ACL payload size 1936 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1937 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1938 } 1939 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1940 } 1941 #endif 1942 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1943 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1944 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1945 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1946 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); 1947 } 1948 #endif 1949 #ifdef ENABLE_LE_CENTRAL 1950 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1951 hci_stack->le_whitelist_capacity = packet[6]; 1952 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1953 } 1954 #endif 1955 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1956 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1957 hci_stack->local_bd_addr); 1958 log_info("Local Address, Status: 0x%02x: Addr: %s", 1959 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1960 #ifdef ENABLE_CLASSIC 1961 if (hci_stack->link_key_db){ 1962 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1963 } 1964 #endif 1965 } 1966 #ifdef ENABLE_CLASSIC 1967 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1968 hci_emit_discoverable_enabled(hci_stack->discoverable); 1969 } 1970 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1971 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1972 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1973 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1974 hci_emit_event(event, sizeof(event), 1); 1975 } 1976 } 1977 #endif 1978 1979 // Note: HCI init checks 1980 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1981 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1982 1983 #ifdef ENABLE_CLASSIC 1984 // determine usable ACL packet types based on host buffer size and supported features 1985 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1986 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1987 #endif 1988 // Classic/LE 1989 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1990 } 1991 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1992 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1993 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1994 uint16_t manufacturer = little_endian_read_16(packet, 10); 1995 // map Cypress to Broadcom 1996 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 1997 log_info("Treat Cypress as Broadcom"); 1998 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 1999 little_endian_store_16(packet, 10, manufacturer); 2000 } 2001 hci_stack->manufacturer = manufacturer; 2002 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 2003 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 2004 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2005 } 2006 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 2007 hci_stack->local_supported_commands[0] = 2008 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2009 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2010 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2011 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2012 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2013 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2014 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1); // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2015 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 2016 } 2017 #ifdef ENABLE_CLASSIC 2018 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 2019 if (packet[5] == 0){ 2020 hci_stack->synchronous_flow_control_enabled = 1; 2021 } 2022 } 2023 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_encryption_key_size)){ 2024 uint8_t status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2025 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2026 conn = hci_connection_for_handle(handle); 2027 if (!conn) break; 2028 if (status == 0){ 2029 uint8_t key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2030 log_info("Handle %x04x key Size: %u", handle, key_size); 2031 conn->encryption_key_size = key_size; 2032 } else { 2033 log_info("Read Encryption Key Size failed -> assuming insecure connection with key size of 1"); 2034 conn->encryption_key_size = 1; 2035 } 2036 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2037 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2038 } 2039 #endif 2040 break; 2041 2042 case HCI_EVENT_COMMAND_STATUS: 2043 // get num cmd packets - limit to 1 to reduce complexity 2044 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2045 2046 // check command status to detected failed outgoing connections 2047 create_connection_cmd = 0; 2048 #ifdef ENABLE_CLASSIC 2049 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2050 create_connection_cmd = 1; 2051 } 2052 #endif 2053 #ifdef ENABLE_LE_CENTRAL 2054 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2055 create_connection_cmd = 1; 2056 } 2057 #endif 2058 if (create_connection_cmd) { 2059 uint8_t status = hci_event_command_status_get_status(packet); 2060 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2061 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); 2062 2063 // reset outgoing address info 2064 memset(hci_stack->outgoing_addr, 0, 6); 2065 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2066 2067 // error => outgoing connection failed 2068 if ((conn != NULL) && (status != 0)){ 2069 hci_handle_connection_failed(conn, status); 2070 } 2071 } 2072 break; 2073 2074 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2075 int offset = 3; 2076 for (i=0; i<packet[2];i++){ 2077 handle = little_endian_read_16(packet, offset) & 0x0fff; 2078 offset += 2; 2079 uint16_t num_packets = little_endian_read_16(packet, offset); 2080 offset += 2; 2081 2082 conn = hci_connection_for_handle(handle); 2083 if (!conn){ 2084 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2085 continue; 2086 } 2087 2088 if (conn->num_packets_sent >= num_packets){ 2089 conn->num_packets_sent -= num_packets; 2090 } else { 2091 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2092 conn->num_packets_sent = 0; 2093 } 2094 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2095 2096 #ifdef ENABLE_CLASSIC 2097 // For SCO, we do the can_send_now_check here 2098 hci_notify_if_sco_can_send_now(); 2099 #endif 2100 } 2101 break; 2102 } 2103 2104 #ifdef ENABLE_CLASSIC 2105 case HCI_EVENT_INQUIRY_COMPLETE: 2106 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2107 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2108 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2109 hci_emit_event(event, sizeof(event), 1); 2110 } 2111 break; 2112 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2113 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2114 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2115 } 2116 break; 2117 case HCI_EVENT_CONNECTION_REQUEST: 2118 reverse_bd_addr(&packet[2], addr); 2119 if (hci_stack->gap_classic_accept_callback != NULL){ 2120 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2121 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2122 bd_addr_copy(hci_stack->decline_addr, addr); 2123 break; 2124 } 2125 } 2126 2127 // TODO: eval COD 8-10 2128 link_type = packet[11]; 2129 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2130 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2131 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2132 if (!conn) { 2133 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2134 } 2135 if (!conn) { 2136 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2137 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2138 bd_addr_copy(hci_stack->decline_addr, addr); 2139 break; 2140 } 2141 conn->role = HCI_ROLE_SLAVE; 2142 conn->state = RECEIVED_CONNECTION_REQUEST; 2143 // store info about eSCO 2144 if (link_type == 0x02){ 2145 conn->remote_supported_feature_eSCO = 1; 2146 } 2147 hci_run(); 2148 break; 2149 2150 case HCI_EVENT_CONNECTION_COMPLETE: 2151 // Connection management 2152 reverse_bd_addr(&packet[5], addr); 2153 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2154 addr_type = BD_ADDR_TYPE_ACL; 2155 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2156 if (conn) { 2157 if (!packet[2]){ 2158 conn->state = OPEN; 2159 conn->con_handle = little_endian_read_16(packet, 3); 2160 2161 // queue get remote feature 2162 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2163 2164 // queue set supervision timeout if we're master 2165 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2166 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2167 } 2168 2169 // restart timer 2170 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2171 btstack_run_loop_add_timer(&conn->timeout); 2172 2173 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2174 2175 hci_emit_nr_connections_changed(); 2176 } else { 2177 // connection failed 2178 hci_handle_connection_failed(conn, packet[2]); 2179 } 2180 } 2181 break; 2182 2183 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2184 reverse_bd_addr(&packet[5], addr); 2185 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2186 if (packet[2]){ 2187 // connection failed 2188 break; 2189 } 2190 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2191 if (!conn) { 2192 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2193 } 2194 if (!conn) { 2195 break; 2196 } 2197 conn->state = OPEN; 2198 conn->con_handle = little_endian_read_16(packet, 3); 2199 2200 #ifdef ENABLE_SCO_OVER_HCI 2201 // update SCO 2202 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2203 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2204 } 2205 // trigger can send now 2206 if (hci_have_usb_transport()){ 2207 hci_stack->sco_can_send_now = 1; 2208 } 2209 #endif 2210 break; 2211 2212 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2213 handle = little_endian_read_16(packet, 3); 2214 conn = hci_connection_for_handle(handle); 2215 if (!conn) break; 2216 if (!packet[2]){ 2217 uint8_t * features = &packet[5]; 2218 if (features[6] & (1 << 3)){ 2219 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2220 } 2221 if (features[3] & (1<<7)){ 2222 conn->remote_supported_feature_eSCO = 1; 2223 } 2224 } 2225 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2226 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2227 if (conn->bonding_flags & BONDING_DEDICATED){ 2228 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2229 } 2230 break; 2231 2232 case HCI_EVENT_LINK_KEY_REQUEST: 2233 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2234 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2235 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2236 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2237 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2238 hci_run(); 2239 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2240 return; 2241 2242 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2243 reverse_bd_addr(&packet[2], addr); 2244 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2245 if (!conn) break; 2246 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2247 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2248 // Change Connection Encryption keeps link key type 2249 if (link_key_type != CHANGED_COMBINATION_KEY){ 2250 conn->link_key_type = link_key_type; 2251 } 2252 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2253 // still forward event to allow dismiss of pairing dialog 2254 break; 2255 } 2256 2257 case HCI_EVENT_PIN_CODE_REQUEST: 2258 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2259 // non-bondable mode: pin code negative reply will be sent 2260 if (!hci_stack->bondable){ 2261 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2262 hci_run(); 2263 return; 2264 } 2265 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2266 if (!hci_stack->link_key_db) break; 2267 hci_event_pin_code_request_get_bd_addr(packet, addr); 2268 hci_stack->link_key_db->delete_link_key(addr); 2269 break; 2270 2271 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2272 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2273 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2274 break; 2275 2276 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2277 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2278 if (!hci_stack->ssp_auto_accept) break; 2279 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2280 break; 2281 2282 case HCI_EVENT_USER_PASSKEY_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_PASSKEY_REPLY); 2286 break; 2287 case HCI_EVENT_MODE_CHANGE: 2288 handle = hci_event_mode_change_get_handle(packet); 2289 conn = hci_connection_for_handle(handle); 2290 if (!conn) break; 2291 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2292 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2293 break; 2294 #endif 2295 2296 case HCI_EVENT_ENCRYPTION_CHANGE: 2297 handle = little_endian_read_16(packet, 3); 2298 conn = hci_connection_for_handle(handle); 2299 if (!conn) break; 2300 if (packet[2] == 0) { 2301 if (packet[5]){ 2302 if (hci_is_le_connection(conn)){ 2303 // For LE, we accept connection as encrypted 2304 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2305 } 2306 #ifdef ENABLE_CLASSIC 2307 else { 2308 // For Classic, we need to validate encryption key size first 2309 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2310 } 2311 #endif 2312 } else { 2313 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2314 } 2315 } 2316 2317 break; 2318 2319 #ifdef ENABLE_CLASSIC 2320 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2321 handle = little_endian_read_16(packet, 3); 2322 conn = hci_connection_for_handle(handle); 2323 if (!conn) break; 2324 2325 // dedicated bonding: send result and disconnect 2326 if (conn->bonding_flags & BONDING_DEDICATED){ 2327 conn->bonding_flags &= ~BONDING_DEDICATED; 2328 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2329 conn->bonding_status = packet[2]; 2330 break; 2331 } 2332 2333 if ((packet[2] == 0) && (gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)){ 2334 // link key sufficient for requested security 2335 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2336 break; 2337 } 2338 // not enough 2339 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2340 break; 2341 #endif 2342 2343 // HCI_EVENT_DISCONNECTION_COMPLETE 2344 // has been split, to first notify stack before shutting connection down 2345 // see end of function, too. 2346 case HCI_EVENT_DISCONNECTION_COMPLETE: 2347 if (packet[2]) break; // status != 0 2348 handle = little_endian_read_16(packet, 3); 2349 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2350 if (hci_stack->acl_fragmentation_total_size > 0) { 2351 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2352 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2353 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2354 hci_stack->acl_fragmentation_total_size = 0; 2355 hci_stack->acl_fragmentation_pos = 0; 2356 if (release_buffer){ 2357 hci_release_packet_buffer(); 2358 } 2359 } 2360 } 2361 2362 // re-enable advertisements for le connections if active 2363 conn = hci_connection_for_handle(handle); 2364 if (!conn) break; 2365 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2366 #ifdef ENABLE_BLE 2367 #ifdef ENABLE_LE_PERIPHERAL 2368 if (hci_is_le_connection(conn)){ 2369 hci_reenable_advertisements_if_needed(); 2370 } 2371 #endif 2372 #endif 2373 break; 2374 2375 case HCI_EVENT_HARDWARE_ERROR: 2376 log_error("Hardware Error: 0x%02x", packet[2]); 2377 if (hci_stack->hardware_error_callback){ 2378 (*hci_stack->hardware_error_callback)(packet[2]); 2379 } else { 2380 // if no special requests, just reboot stack 2381 hci_power_control_off(); 2382 hci_power_control_on(); 2383 } 2384 break; 2385 2386 #ifdef ENABLE_CLASSIC 2387 case HCI_EVENT_ROLE_CHANGE: 2388 if (packet[2]) break; // status != 0 2389 reverse_bd_addr(&packet[3], addr); 2390 addr_type = BD_ADDR_TYPE_ACL; 2391 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2392 if (!conn) break; 2393 conn->role = packet[9]; 2394 break; 2395 #endif 2396 2397 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2398 // release packet buffer only for asynchronous transport and if there are not further fragements 2399 if (hci_transport_synchronous()) { 2400 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2401 return; // instead of break: to avoid re-entering hci_run() 2402 } 2403 hci_stack->acl_fragmentation_tx_active = 0; 2404 if (hci_stack->acl_fragmentation_total_size) break; 2405 hci_release_packet_buffer(); 2406 2407 // L2CAP receives this event via the hci_emit_event below 2408 2409 #ifdef ENABLE_CLASSIC 2410 // For SCO, we do the can_send_now_check here 2411 hci_notify_if_sco_can_send_now(); 2412 #endif 2413 break; 2414 2415 #ifdef ENABLE_CLASSIC 2416 case HCI_EVENT_SCO_CAN_SEND_NOW: 2417 // For SCO, we do the can_send_now_check here 2418 hci_stack->sco_can_send_now = 1; 2419 hci_notify_if_sco_can_send_now(); 2420 return; 2421 2422 // explode inquriy results for easier consumption 2423 case HCI_EVENT_INQUIRY_RESULT: 2424 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2425 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2426 gap_inquiry_explode(packet); 2427 break; 2428 #endif 2429 2430 #ifdef ENABLE_BLE 2431 case HCI_EVENT_LE_META: 2432 switch (packet[2]){ 2433 #ifdef ENABLE_LE_CENTRAL 2434 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2435 // log_info("advertising report received"); 2436 if (!hci_stack->le_scanning_enabled) break; 2437 le_handle_advertisement_report(packet, size); 2438 break; 2439 #endif 2440 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2441 // Connection management 2442 reverse_bd_addr(&packet[8], addr); 2443 addr_type = (bd_addr_type_t)packet[7]; 2444 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2445 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2446 2447 #ifdef ENABLE_LE_CENTRAL 2448 // if auto-connect, remove from whitelist in both roles 2449 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2450 hci_remove_from_whitelist(addr_type, addr); 2451 } 2452 // handle error: error is reported only to the initiator -> outgoing connection 2453 if (packet[3]){ 2454 2455 // handle cancelled outgoing connection 2456 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2457 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2458 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2459 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2460 conn = gap_get_outgoing_connection(); 2461 } 2462 2463 // outgoing connection establishment is done 2464 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2465 // remove entry 2466 if (conn){ 2467 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2468 btstack_memory_hci_connection_free( conn ); 2469 } 2470 break; 2471 } 2472 #endif 2473 // on success, both hosts receive connection complete event 2474 if (packet[6] == HCI_ROLE_MASTER){ 2475 #ifdef ENABLE_LE_CENTRAL 2476 // if we're master, it was an outgoing connection and we're done with it 2477 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2478 #endif 2479 } else { 2480 #ifdef ENABLE_LE_PERIPHERAL 2481 // if we're slave, it was an incoming connection, advertisements have stopped 2482 hci_stack->le_advertisements_active = 0; 2483 #endif 2484 } 2485 // LE connections are auto-accepted, so just create a connection if there isn't one already 2486 if (!conn){ 2487 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2488 } 2489 // no memory, sorry. 2490 if (!conn){ 2491 break; 2492 } 2493 2494 conn->state = OPEN; 2495 conn->role = packet[6]; 2496 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2497 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2498 2499 #ifdef ENABLE_LE_PERIPHERAL 2500 if (packet[6] == HCI_ROLE_SLAVE){ 2501 hci_reenable_advertisements_if_needed(); 2502 } 2503 #endif 2504 2505 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2506 2507 // restart timer 2508 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2509 // btstack_run_loop_add_timer(&conn->timeout); 2510 2511 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2512 2513 hci_emit_nr_connections_changed(); 2514 break; 2515 2516 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2517 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2518 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2519 conn = hci_connection_for_handle(handle); 2520 if (!conn) break; 2521 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2522 break; 2523 2524 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2525 // connection 2526 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2527 conn = hci_connection_for_handle(handle); 2528 if (conn) { 2529 // read arguments 2530 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2531 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2532 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2533 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2534 2535 // validate against current connection parameter range 2536 le_connection_parameter_range_t existing_range; 2537 gap_get_connection_parameter_range(&existing_range); 2538 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2539 if (update_parameter){ 2540 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2541 conn->le_conn_interval_min = le_conn_interval_min; 2542 conn->le_conn_interval_max = le_conn_interval_max; 2543 conn->le_conn_latency = le_conn_latency; 2544 conn->le_supervision_timeout = le_supervision_timeout; 2545 } else { 2546 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2547 } 2548 } 2549 break; 2550 default: 2551 break; 2552 } 2553 break; 2554 #endif 2555 case HCI_EVENT_VENDOR_SPECIFIC: 2556 // Vendor specific commands often create vendor specific event instead of num completed packets 2557 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2558 switch (hci_stack->manufacturer){ 2559 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2560 hci_stack->num_cmd_packets = 1; 2561 break; 2562 default: 2563 break; 2564 } 2565 break; 2566 default: 2567 break; 2568 } 2569 2570 // handle BT initialization 2571 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2572 hci_initializing_event_handler(packet, size); 2573 } 2574 2575 // help with BT sleep 2576 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2577 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2578 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2579 hci_initializing_next_state(); 2580 } 2581 2582 // notify upper stack 2583 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2584 2585 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2586 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2587 if (!packet[2]){ 2588 handle = little_endian_read_16(packet, 3); 2589 hci_connection_t * aConn = hci_connection_for_handle(handle); 2590 if (aConn) { 2591 uint8_t status = aConn->bonding_status; 2592 uint16_t flags = aConn->bonding_flags; 2593 bd_addr_t bd_address; 2594 memcpy(&bd_address, aConn->address, 6); 2595 hci_shutdown_connection(aConn); 2596 // connection struct is gone, don't access anymore 2597 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2598 hci_emit_dedicated_bonding_result(bd_address, status); 2599 } 2600 } 2601 } 2602 } 2603 2604 // execute main loop 2605 hci_run(); 2606 } 2607 2608 #ifdef ENABLE_CLASSIC 2609 2610 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2611 static void sco_schedule_tx(hci_connection_t * conn); 2612 2613 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2614 log_debug("SCO TX Timeout"); 2615 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2616 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2617 if (!conn) return; 2618 2619 // trigger send 2620 conn->sco_tx_ready = 1; 2621 // extra packet if CVSD but SCO buffer is too short 2622 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2623 conn->sco_tx_ready++; 2624 } 2625 hci_notify_if_sco_can_send_now(); 2626 } 2627 2628 2629 #define SCO_TX_AFTER_RX_MS (6) 2630 2631 static void sco_schedule_tx(hci_connection_t * conn){ 2632 2633 uint32_t now = btstack_run_loop_get_time_ms(); 2634 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2635 int time_delta_ms = sco_tx_ms - now; 2636 2637 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2638 2639 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2640 btstack_run_loop_set_timer(timer, time_delta_ms); 2641 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2642 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2643 btstack_run_loop_add_timer(timer); 2644 } 2645 2646 static void sco_handler(uint8_t * packet, uint16_t size){ 2647 // lookup connection struct 2648 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2649 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2650 if (!conn) return; 2651 2652 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2653 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2654 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2655 packet[2] = 0x3c; 2656 memmove(&packet[3], &packet[23], 63); 2657 size = 63; 2658 } 2659 } 2660 2661 if (hci_have_usb_transport()){ 2662 // Nothing to do 2663 } else { 2664 // 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); 2665 if (hci_stack->synchronous_flow_control_enabled == 0){ 2666 uint32_t now = btstack_run_loop_get_time_ms(); 2667 2668 if (!conn->sco_rx_valid){ 2669 // ignore first 10 packets 2670 conn->sco_rx_count++; 2671 // log_debug("sco rx count %u", conn->sco_rx_count); 2672 if (conn->sco_rx_count == 10) { 2673 // use first timestamp as is and pretent it just started 2674 conn->sco_rx_ms = now; 2675 conn->sco_rx_valid = 1; 2676 conn->sco_rx_count = 0; 2677 sco_schedule_tx(conn); 2678 } 2679 } else { 2680 // track expected arrival timme 2681 conn->sco_rx_count++; 2682 conn->sco_rx_ms += 7; 2683 int delta = (int32_t) (now - conn->sco_rx_ms); 2684 if (delta > 0){ 2685 conn->sco_rx_ms++; 2686 } 2687 // log_debug("sco rx %u", conn->sco_rx_ms); 2688 sco_schedule_tx(conn); 2689 } 2690 } 2691 } 2692 // deliver to app 2693 if (hci_stack->sco_packet_handler) { 2694 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2695 } 2696 2697 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2698 conn->num_packets_completed++; 2699 hci_stack->host_completed_packets = 1; 2700 hci_run(); 2701 #endif 2702 } 2703 #endif 2704 2705 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2706 hci_dump_packet(packet_type, 1, packet, size); 2707 switch (packet_type) { 2708 case HCI_EVENT_PACKET: 2709 event_handler(packet, size); 2710 break; 2711 case HCI_ACL_DATA_PACKET: 2712 acl_handler(packet, size); 2713 break; 2714 #ifdef ENABLE_CLASSIC 2715 case HCI_SCO_DATA_PACKET: 2716 sco_handler(packet, size); 2717 break; 2718 #endif 2719 default: 2720 break; 2721 } 2722 } 2723 2724 /** 2725 * @brief Add event packet handler. 2726 */ 2727 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2728 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2729 } 2730 2731 2732 /** Register HCI packet handlers */ 2733 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2734 hci_stack->acl_packet_handler = handler; 2735 } 2736 2737 #ifdef ENABLE_CLASSIC 2738 /** 2739 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2740 */ 2741 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2742 hci_stack->sco_packet_handler = handler; 2743 } 2744 #endif 2745 2746 static void hci_state_reset(void){ 2747 // no connections yet 2748 hci_stack->connections = NULL; 2749 2750 // keep discoverable/connectable as this has been requested by the client(s) 2751 // hci_stack->discoverable = 0; 2752 // hci_stack->connectable = 0; 2753 // hci_stack->bondable = 1; 2754 // hci_stack->own_addr_type = 0; 2755 2756 // buffer is free 2757 hci_stack->hci_packet_buffer_reserved = 0; 2758 2759 // no pending cmds 2760 hci_stack->decline_reason = 0; 2761 hci_stack->new_scan_enable_value = 0xff; 2762 2763 // LE 2764 #ifdef ENABLE_BLE 2765 memset(hci_stack->le_random_address, 0, 6); 2766 hci_stack->le_random_address_set = 0; 2767 #endif 2768 #ifdef ENABLE_LE_CENTRAL 2769 hci_stack->le_scanning_active = 0; 2770 hci_stack->le_scan_type = 0xff; 2771 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2772 hci_stack->le_whitelist = 0; 2773 hci_stack->le_whitelist_capacity = 0; 2774 #endif 2775 } 2776 2777 #ifdef ENABLE_CLASSIC 2778 /** 2779 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2780 */ 2781 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2782 // store and open remote device db 2783 hci_stack->link_key_db = link_key_db; 2784 if (hci_stack->link_key_db) { 2785 hci_stack->link_key_db->open(); 2786 } 2787 } 2788 #endif 2789 2790 void hci_init(const hci_transport_t *transport, const void *config){ 2791 2792 #ifdef HAVE_MALLOC 2793 if (!hci_stack) { 2794 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2795 } 2796 #else 2797 hci_stack = &hci_stack_static; 2798 #endif 2799 memset(hci_stack, 0, sizeof(hci_stack_t)); 2800 2801 // reference to use transport layer implementation 2802 hci_stack->hci_transport = transport; 2803 2804 // reference to used config 2805 hci_stack->config = config; 2806 2807 // setup pointer for outgoing packet buffer 2808 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2809 2810 // max acl payload size defined in config.h 2811 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2812 2813 // register packet handlers with transport 2814 transport->register_packet_handler(&packet_handler); 2815 2816 hci_stack->state = HCI_STATE_OFF; 2817 2818 // class of device 2819 hci_stack->class_of_device = 0x007a020c; // Smartphone 2820 2821 // bondable by default 2822 hci_stack->bondable = 1; 2823 2824 #ifdef ENABLE_CLASSIC 2825 // classic name 2826 hci_stack->local_name = default_classic_name; 2827 2828 // Master slave policy 2829 hci_stack->master_slave_policy = 1; 2830 2831 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3, we use 16 as default 2832 hci_stack->gap_required_encyrption_key_size = 16; 2833 #endif 2834 2835 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2836 hci_stack->ssp_enable = 1; 2837 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2838 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2839 hci_stack->ssp_auto_accept = 1; 2840 2841 // voice setting - signed 16 bit pcm data with CVSD over the air 2842 hci_stack->sco_voice_setting = 0x60; 2843 2844 #ifdef ENABLE_LE_CENTRAL 2845 // connection parameter to use for outgoing connections 2846 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2847 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2848 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2849 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2850 hci_stack->le_connection_latency = 4; // 4 2851 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2852 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2853 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2854 2855 // default LE Scanning 2856 hci_stack->le_scan_interval = 0x1e0; 2857 hci_stack->le_scan_window = 0x30; 2858 #endif 2859 2860 #ifdef ENABLE_LE_PERIPHERAL 2861 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2862 #endif 2863 2864 // connection parameter range used to answer connection parameter update requests in l2cap 2865 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2866 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2867 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2868 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2869 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2870 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2871 2872 hci_state_reset(); 2873 } 2874 2875 /** 2876 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2877 */ 2878 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2879 hci_stack->chipset = chipset_driver; 2880 2881 // reset chipset driver - init is also called on power_up 2882 if (hci_stack->chipset && hci_stack->chipset->init){ 2883 hci_stack->chipset->init(hci_stack->config); 2884 } 2885 } 2886 2887 /** 2888 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2889 */ 2890 void hci_set_control(const btstack_control_t *hardware_control){ 2891 // references to used control implementation 2892 hci_stack->control = hardware_control; 2893 // init with transport config 2894 hardware_control->init(hci_stack->config); 2895 } 2896 2897 void hci_close(void){ 2898 // close remote device db 2899 if (hci_stack->link_key_db) { 2900 hci_stack->link_key_db->close(); 2901 } 2902 2903 btstack_linked_list_iterator_t lit; 2904 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2905 while (btstack_linked_list_iterator_has_next(&lit)){ 2906 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2907 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2908 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2909 hci_shutdown_connection(connection); 2910 } 2911 2912 hci_power_control(HCI_POWER_OFF); 2913 2914 #ifdef HAVE_MALLOC 2915 free(hci_stack); 2916 #endif 2917 hci_stack = NULL; 2918 } 2919 2920 #ifdef ENABLE_CLASSIC 2921 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 2922 // validate ranage and set 2923 if (encryption_key_size < 7) return; 2924 if (encryption_key_size > 16) return; 2925 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 2926 } 2927 #endif 2928 2929 #ifdef ENABLE_CLASSIC 2930 void gap_set_class_of_device(uint32_t class_of_device){ 2931 hci_stack->class_of_device = class_of_device; 2932 } 2933 2934 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 2935 hci_stack->default_link_policy_settings = default_link_policy_settings; 2936 } 2937 2938 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 2939 hci_stack->link_supervision_timeout = link_supervision_timeout; 2940 } 2941 2942 void hci_disable_l2cap_timeout_check(void){ 2943 disable_l2cap_timeouts = 1; 2944 } 2945 #endif 2946 2947 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2948 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2949 void hci_set_bd_addr(bd_addr_t addr){ 2950 memcpy(hci_stack->custom_bd_addr, addr, 6); 2951 hci_stack->custom_bd_addr_set = 1; 2952 } 2953 #endif 2954 2955 // State-Module-Driver overview 2956 // state module low-level 2957 // HCI_STATE_OFF off close 2958 // HCI_STATE_INITIALIZING, on open 2959 // HCI_STATE_WORKING, on open 2960 // HCI_STATE_HALTING, on open 2961 // HCI_STATE_SLEEPING, off/sleep close 2962 // HCI_STATE_FALLING_ASLEEP on open 2963 2964 static int hci_power_control_on(void){ 2965 2966 // power on 2967 int err = 0; 2968 if (hci_stack->control && hci_stack->control->on){ 2969 err = (*hci_stack->control->on)(); 2970 } 2971 if (err){ 2972 log_error( "POWER_ON failed"); 2973 hci_emit_hci_open_failed(); 2974 return err; 2975 } 2976 2977 // int chipset driver 2978 if (hci_stack->chipset && hci_stack->chipset->init){ 2979 hci_stack->chipset->init(hci_stack->config); 2980 } 2981 2982 // init transport 2983 if (hci_stack->hci_transport->init){ 2984 hci_stack->hci_transport->init(hci_stack->config); 2985 } 2986 2987 // open transport 2988 err = hci_stack->hci_transport->open(); 2989 if (err){ 2990 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2991 if (hci_stack->control && hci_stack->control->off){ 2992 (*hci_stack->control->off)(); 2993 } 2994 hci_emit_hci_open_failed(); 2995 return err; 2996 } 2997 return 0; 2998 } 2999 3000 static void hci_power_control_off(void){ 3001 3002 log_info("hci_power_control_off"); 3003 3004 // close low-level device 3005 hci_stack->hci_transport->close(); 3006 3007 log_info("hci_power_control_off - hci_transport closed"); 3008 3009 // power off 3010 if (hci_stack->control && hci_stack->control->off){ 3011 (*hci_stack->control->off)(); 3012 } 3013 3014 log_info("hci_power_control_off - control closed"); 3015 3016 hci_stack->state = HCI_STATE_OFF; 3017 } 3018 3019 static void hci_power_control_sleep(void){ 3020 3021 log_info("hci_power_control_sleep"); 3022 3023 #if 0 3024 // don't close serial port during sleep 3025 3026 // close low-level device 3027 hci_stack->hci_transport->close(hci_stack->config); 3028 #endif 3029 3030 // sleep mode 3031 if (hci_stack->control && hci_stack->control->sleep){ 3032 (*hci_stack->control->sleep)(); 3033 } 3034 3035 hci_stack->state = HCI_STATE_SLEEPING; 3036 } 3037 3038 static int hci_power_control_wake(void){ 3039 3040 log_info("hci_power_control_wake"); 3041 3042 // wake on 3043 if (hci_stack->control && hci_stack->control->wake){ 3044 (*hci_stack->control->wake)(); 3045 } 3046 3047 #if 0 3048 // open low-level device 3049 int err = hci_stack->hci_transport->open(hci_stack->config); 3050 if (err){ 3051 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3052 if (hci_stack->control && hci_stack->control->off){ 3053 (*hci_stack->control->off)(); 3054 } 3055 hci_emit_hci_open_failed(); 3056 return err; 3057 } 3058 #endif 3059 3060 return 0; 3061 } 3062 3063 static void hci_power_transition_to_initializing(void){ 3064 // set up state machine 3065 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3066 hci_stack->hci_packet_buffer_reserved = 0; 3067 hci_stack->state = HCI_STATE_INITIALIZING; 3068 hci_stack->substate = HCI_INIT_SEND_RESET; 3069 } 3070 3071 int hci_power_control(HCI_POWER_MODE power_mode){ 3072 3073 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3074 3075 int err = 0; 3076 switch (hci_stack->state){ 3077 3078 case HCI_STATE_OFF: 3079 switch (power_mode){ 3080 case HCI_POWER_ON: 3081 err = hci_power_control_on(); 3082 if (err) { 3083 log_error("hci_power_control_on() error %d", err); 3084 return err; 3085 } 3086 hci_power_transition_to_initializing(); 3087 break; 3088 case HCI_POWER_OFF: 3089 // do nothing 3090 break; 3091 case HCI_POWER_SLEEP: 3092 // do nothing (with SLEEP == OFF) 3093 break; 3094 } 3095 break; 3096 3097 case HCI_STATE_INITIALIZING: 3098 switch (power_mode){ 3099 case HCI_POWER_ON: 3100 // do nothing 3101 break; 3102 case HCI_POWER_OFF: 3103 // no connections yet, just turn it off 3104 hci_power_control_off(); 3105 break; 3106 case HCI_POWER_SLEEP: 3107 // no connections yet, just turn it off 3108 hci_power_control_sleep(); 3109 break; 3110 } 3111 break; 3112 3113 case HCI_STATE_WORKING: 3114 switch (power_mode){ 3115 case HCI_POWER_ON: 3116 // do nothing 3117 break; 3118 case HCI_POWER_OFF: 3119 // see hci_run 3120 hci_stack->state = HCI_STATE_HALTING; 3121 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3122 break; 3123 case HCI_POWER_SLEEP: 3124 // see hci_run 3125 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3126 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3127 break; 3128 } 3129 break; 3130 3131 case HCI_STATE_HALTING: 3132 switch (power_mode){ 3133 case HCI_POWER_ON: 3134 hci_power_transition_to_initializing(); 3135 break; 3136 case HCI_POWER_OFF: 3137 // do nothing 3138 break; 3139 case HCI_POWER_SLEEP: 3140 // see hci_run 3141 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3142 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3143 break; 3144 } 3145 break; 3146 3147 case HCI_STATE_FALLING_ASLEEP: 3148 switch (power_mode){ 3149 case HCI_POWER_ON: 3150 3151 #ifdef HAVE_PLATFORM_IPHONE_OS 3152 // nothing to do, if H4 supports power management 3153 if (btstack_control_iphone_power_management_enabled()){ 3154 hci_stack->state = HCI_STATE_INITIALIZING; 3155 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3156 break; 3157 } 3158 #endif 3159 hci_power_transition_to_initializing(); 3160 break; 3161 case HCI_POWER_OFF: 3162 // see hci_run 3163 hci_stack->state = HCI_STATE_HALTING; 3164 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3165 break; 3166 case HCI_POWER_SLEEP: 3167 // do nothing 3168 break; 3169 } 3170 break; 3171 3172 case HCI_STATE_SLEEPING: 3173 switch (power_mode){ 3174 case HCI_POWER_ON: 3175 3176 #ifdef HAVE_PLATFORM_IPHONE_OS 3177 // nothing to do, if H4 supports power management 3178 if (btstack_control_iphone_power_management_enabled()){ 3179 hci_stack->state = HCI_STATE_INITIALIZING; 3180 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3181 hci_update_scan_enable(); 3182 break; 3183 } 3184 #endif 3185 err = hci_power_control_wake(); 3186 if (err) return err; 3187 hci_power_transition_to_initializing(); 3188 break; 3189 case HCI_POWER_OFF: 3190 hci_stack->state = HCI_STATE_HALTING; 3191 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3192 break; 3193 case HCI_POWER_SLEEP: 3194 // do nothing 3195 break; 3196 } 3197 break; 3198 } 3199 3200 // create internal event 3201 hci_emit_state(); 3202 3203 // trigger next/first action 3204 hci_run(); 3205 3206 return 0; 3207 } 3208 3209 3210 #ifdef ENABLE_CLASSIC 3211 3212 static void hci_update_scan_enable(void){ 3213 // 2 = page scan, 1 = inq scan 3214 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3215 hci_run(); 3216 } 3217 3218 void gap_discoverable_control(uint8_t enable){ 3219 if (enable) enable = 1; // normalize argument 3220 3221 if (hci_stack->discoverable == enable){ 3222 hci_emit_discoverable_enabled(hci_stack->discoverable); 3223 return; 3224 } 3225 3226 hci_stack->discoverable = enable; 3227 hci_update_scan_enable(); 3228 } 3229 3230 void gap_connectable_control(uint8_t enable){ 3231 if (enable) enable = 1; // normalize argument 3232 3233 // don't emit event 3234 if (hci_stack->connectable == enable) return; 3235 3236 hci_stack->connectable = enable; 3237 hci_update_scan_enable(); 3238 } 3239 #endif 3240 3241 void gap_local_bd_addr(bd_addr_t address_buffer){ 3242 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3243 } 3244 3245 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3246 static void hci_host_num_completed_packets(void){ 3247 3248 // create packet manually as arrays are not supported and num_commands should not get reduced 3249 hci_reserve_packet_buffer(); 3250 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3251 3252 uint16_t size = 0; 3253 uint16_t num_handles = 0; 3254 packet[size++] = 0x35; 3255 packet[size++] = 0x0c; 3256 size++; // skip param len 3257 size++; // skip num handles 3258 3259 // add { handle, packets } entries 3260 btstack_linked_item_t * it; 3261 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3262 hci_connection_t * connection = (hci_connection_t *) it; 3263 if (connection->num_packets_completed){ 3264 little_endian_store_16(packet, size, connection->con_handle); 3265 size += 2; 3266 little_endian_store_16(packet, size, connection->num_packets_completed); 3267 size += 2; 3268 // 3269 num_handles++; 3270 connection->num_packets_completed = 0; 3271 } 3272 } 3273 3274 packet[2] = size - 3; 3275 packet[3] = num_handles; 3276 3277 hci_stack->host_completed_packets = 0; 3278 3279 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3280 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3281 3282 // release packet buffer for synchronous transport implementations 3283 if (hci_transport_synchronous()){ 3284 hci_release_packet_buffer(); 3285 hci_emit_transport_packet_sent(); 3286 } 3287 } 3288 #endif 3289 3290 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3291 UNUSED(ds); 3292 hci_stack->substate = HCI_HALTING_CLOSE; 3293 // allow packet handlers to defer final shutdown 3294 hci_emit_state(); 3295 hci_run(); 3296 } 3297 3298 static void hci_run(void){ 3299 3300 // log_info("hci_run: entered"); 3301 btstack_linked_item_t * it; 3302 3303 // send continuation fragments first, as they block the prepared packet buffer 3304 if (hci_stack->acl_fragmentation_total_size > 0) { 3305 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3306 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3307 if (connection) { 3308 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3309 hci_send_acl_packet_fragments(connection); 3310 return; 3311 } 3312 } else { 3313 // connection gone -> discard further fragments 3314 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3315 hci_stack->acl_fragmentation_total_size = 0; 3316 hci_stack->acl_fragmentation_pos = 0; 3317 } 3318 } 3319 3320 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3321 // send host num completed packets next as they don't require num_cmd_packets > 0 3322 if (!hci_can_send_comand_packet_transport()) return; 3323 if (hci_stack->host_completed_packets){ 3324 hci_host_num_completed_packets(); 3325 return; 3326 } 3327 #endif 3328 3329 if (!hci_can_send_command_packet_now()) return; 3330 3331 // global/non-connection oriented commands 3332 3333 #ifdef ENABLE_CLASSIC 3334 // decline incoming connections 3335 if (hci_stack->decline_reason){ 3336 uint8_t reason = hci_stack->decline_reason; 3337 hci_stack->decline_reason = 0; 3338 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3339 return; 3340 } 3341 // send scan enable 3342 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3343 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3344 hci_stack->new_scan_enable_value = 0xff; 3345 return; 3346 } 3347 // start/stop inquiry 3348 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3349 uint8_t duration = hci_stack->inquiry_state; 3350 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3351 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3352 return; 3353 } 3354 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3355 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3356 hci_send_cmd(&hci_inquiry_cancel); 3357 return; 3358 } 3359 // remote name request 3360 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3361 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3362 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3363 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3364 return; 3365 } 3366 // pairing 3367 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3368 uint8_t state = hci_stack->gap_pairing_state; 3369 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3370 switch (state){ 3371 case GAP_PAIRING_STATE_SEND_PIN: 3372 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); 3373 break; 3374 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3375 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3376 break; 3377 case GAP_PAIRING_STATE_SEND_PASSKEY: 3378 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3379 break; 3380 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3381 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3382 break; 3383 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3384 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3385 break; 3386 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3387 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3388 break; 3389 default: 3390 break; 3391 } 3392 return; 3393 } 3394 #endif 3395 3396 #ifdef ENABLE_BLE 3397 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 3398 if ((hci_stack->state == HCI_STATE_WORKING) 3399 && ((hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC) || hci_stack->le_random_address_set)){ 3400 3401 #ifdef ENABLE_LE_CENTRAL 3402 // handle le scan 3403 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3404 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3405 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3406 return; 3407 } 3408 if (hci_stack->le_scan_type != 0xff){ 3409 // defaults: active scanning, accept all advertisement packets 3410 int scan_type = hci_stack->le_scan_type; 3411 hci_stack->le_scan_type = 0xff; 3412 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); 3413 return; 3414 } 3415 #endif 3416 #ifdef ENABLE_LE_PERIPHERAL 3417 // le advertisement control 3418 if (hci_stack->le_advertisements_todo){ 3419 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3420 } 3421 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3422 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3423 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3424 return; 3425 } 3426 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3427 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3428 hci_send_cmd(&hci_le_set_advertising_parameters, 3429 hci_stack->le_advertisements_interval_min, 3430 hci_stack->le_advertisements_interval_max, 3431 hci_stack->le_advertisements_type, 3432 hci_stack->le_own_addr_type, 3433 hci_stack->le_advertisements_direct_address_type, 3434 hci_stack->le_advertisements_direct_address, 3435 hci_stack->le_advertisements_channel_map, 3436 hci_stack->le_advertisements_filter_policy); 3437 return; 3438 } 3439 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3440 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3441 uint8_t adv_data_clean[31]; 3442 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3443 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3444 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3445 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3446 return; 3447 } 3448 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3449 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3450 uint8_t scan_data_clean[31]; 3451 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3452 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3453 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3454 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3455 return; 3456 } 3457 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3458 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3459 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3460 return; 3461 } 3462 #endif 3463 3464 #ifdef ENABLE_LE_CENTRAL 3465 // 3466 // LE Whitelist Management 3467 // 3468 3469 // check if whitelist needs modification 3470 btstack_linked_list_iterator_t lit; 3471 int modification_pending = 0; 3472 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3473 while (btstack_linked_list_iterator_has_next(&lit)){ 3474 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3475 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3476 modification_pending = 1; 3477 break; 3478 } 3479 } 3480 3481 if (modification_pending){ 3482 // stop connnecting if modification pending 3483 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3484 hci_send_cmd(&hci_le_create_connection_cancel); 3485 return; 3486 } 3487 3488 // add/remove entries 3489 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3490 while (btstack_linked_list_iterator_has_next(&lit)){ 3491 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3492 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3493 entry->state = LE_WHITELIST_ON_CONTROLLER; 3494 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3495 return; 3496 3497 } 3498 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3499 bd_addr_t address; 3500 bd_addr_type_t address_type = entry->address_type; 3501 memcpy(address, entry->address, 6); 3502 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3503 btstack_memory_whitelist_entry_free(entry); 3504 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3505 return; 3506 } 3507 } 3508 } 3509 3510 // start connecting 3511 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && 3512 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3513 bd_addr_t null_addr; 3514 memset(null_addr, 0, 6); 3515 hci_send_cmd(&hci_le_create_connection, 3516 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3517 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3518 1, // use whitelist 3519 0, // peer address type 3520 null_addr, // peer bd addr 3521 hci_stack->le_own_addr_type, // our addr type: 3522 hci_stack->le_connection_interval_min, // conn interval min 3523 hci_stack->le_connection_interval_max, // conn interval max 3524 hci_stack->le_connection_latency, // conn latency 3525 hci_stack->le_supervision_timeout, // conn latency 3526 hci_stack->le_minimum_ce_length, // min ce length 3527 hci_stack->le_maximum_ce_length // max ce length 3528 ); 3529 return; 3530 } 3531 #endif 3532 } 3533 #endif 3534 3535 // send pending HCI commands 3536 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3537 hci_connection_t * connection = (hci_connection_t *) it; 3538 3539 switch(connection->state){ 3540 case SEND_CREATE_CONNECTION: 3541 switch(connection->address_type){ 3542 #ifdef ENABLE_CLASSIC 3543 case BD_ADDR_TYPE_ACL: 3544 log_info("sending hci_create_connection"); 3545 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3546 break; 3547 #endif 3548 default: 3549 #ifdef ENABLE_BLE 3550 #ifdef ENABLE_LE_CENTRAL 3551 // track outgoing connection 3552 hci_stack->outgoing_addr_type = connection->address_type; 3553 memcpy(hci_stack->outgoing_addr, connection->address, 6); 3554 log_info("sending hci_le_create_connection"); 3555 hci_send_cmd(&hci_le_create_connection, 3556 hci_stack->le_connection_scan_interval, // conn scan interval 3557 hci_stack->le_connection_scan_window, // conn scan windows 3558 0, // don't use whitelist 3559 connection->address_type, // peer address type 3560 connection->address, // peer bd addr 3561 hci_stack->le_own_addr_type, // our addr type: 3562 hci_stack->le_connection_interval_min, // conn interval min 3563 hci_stack->le_connection_interval_max, // conn interval max 3564 hci_stack->le_connection_latency, // conn latency 3565 hci_stack->le_supervision_timeout, // conn latency 3566 hci_stack->le_minimum_ce_length, // min ce length 3567 hci_stack->le_maximum_ce_length // max ce length 3568 ); 3569 connection->state = SENT_CREATE_CONNECTION; 3570 #endif 3571 #endif 3572 break; 3573 } 3574 return; 3575 3576 #ifdef ENABLE_CLASSIC 3577 case RECEIVED_CONNECTION_REQUEST: 3578 connection->role = HCI_ROLE_SLAVE; 3579 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3580 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3581 connection->state = ACCEPTED_CONNECTION_REQUEST; 3582 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3583 } 3584 return; 3585 #endif 3586 3587 #ifdef ENABLE_BLE 3588 #ifdef ENABLE_LE_CENTRAL 3589 case SEND_CANCEL_CONNECTION: 3590 connection->state = SENT_CANCEL_CONNECTION; 3591 hci_send_cmd(&hci_le_create_connection_cancel); 3592 return; 3593 #endif 3594 #endif 3595 case SEND_DISCONNECT: 3596 connection->state = SENT_DISCONNECT; 3597 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3598 return; 3599 3600 default: 3601 break; 3602 } 3603 3604 // no further commands if connection is about to get shut down 3605 if (connection->state == SENT_DISCONNECT) continue; 3606 3607 if (connection->authentication_flags & READ_RSSI){ 3608 connectionClearAuthenticationFlags(connection, READ_RSSI); 3609 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3610 return; 3611 } 3612 3613 #ifdef ENABLE_CLASSIC 3614 3615 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 3616 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 3617 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 3618 return; 3619 } 3620 3621 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3622 log_info("responding to link key request"); 3623 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3624 link_key_t link_key; 3625 link_key_type_t link_key_type; 3626 if ( hci_stack->link_key_db 3627 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3628 && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level)){ 3629 connection->link_key_type = link_key_type; 3630 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3631 } else { 3632 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3633 } 3634 return; 3635 } 3636 3637 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3638 log_info("denying to pin request"); 3639 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3640 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3641 return; 3642 } 3643 3644 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3645 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3646 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3647 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3648 // tweak authentication requirements 3649 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3650 if (connection->bonding_flags & BONDING_DEDICATED){ 3651 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3652 } 3653 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3654 authreq |= 1; 3655 } 3656 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3657 } else { 3658 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3659 } 3660 return; 3661 } 3662 3663 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3664 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3665 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3666 return; 3667 } 3668 3669 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3670 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3671 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3672 return; 3673 } 3674 3675 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3676 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3677 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3678 return; 3679 } 3680 3681 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3682 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3683 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3684 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3685 return; 3686 } 3687 3688 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3689 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3690 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3691 return; 3692 } 3693 3694 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3695 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3696 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3697 return; 3698 } 3699 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3700 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3701 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3702 return; 3703 } 3704 #endif 3705 3706 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3707 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3708 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3709 return; 3710 } 3711 3712 #ifdef ENABLE_CLASSIC 3713 uint16_t sniff_min_interval; 3714 switch (connection->sniff_min_interval){ 3715 case 0: 3716 break; 3717 case 0xffff: 3718 connection->sniff_min_interval = 0; 3719 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3720 return; 3721 default: 3722 sniff_min_interval = connection->sniff_min_interval; 3723 connection->sniff_min_interval = 0; 3724 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3725 return; 3726 } 3727 #endif 3728 3729 #ifdef ENABLE_BLE 3730 switch (connection->le_con_parameter_update_state){ 3731 // response to L2CAP CON PARAMETER UPDATE REQUEST 3732 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3733 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3734 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3735 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3736 0x0000, 0xffff); 3737 return; 3738 case CON_PARAMETER_UPDATE_REPLY: 3739 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3740 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3741 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3742 0x0000, 0xffff); 3743 return; 3744 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3745 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3746 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3747 return; 3748 default: 3749 break; 3750 } 3751 if (connection->le_phy_update_all_phys != 0xff){ 3752 uint8_t all_phys = connection->le_phy_update_all_phys; 3753 connection->le_phy_update_all_phys = 0xff; 3754 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); 3755 return; 3756 } 3757 #endif 3758 } 3759 3760 hci_connection_t * connection; 3761 switch (hci_stack->state){ 3762 case HCI_STATE_INITIALIZING: 3763 hci_initializing_run(); 3764 break; 3765 3766 case HCI_STATE_HALTING: 3767 3768 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 3769 switch (hci_stack->substate){ 3770 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 3771 case HCI_HALTING_DISCONNECT_ALL_TIMER: 3772 3773 #ifdef ENABLE_BLE 3774 #ifdef ENABLE_LE_CENTRAL 3775 // free whitelist entries 3776 { 3777 btstack_linked_list_iterator_t lit; 3778 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3779 while (btstack_linked_list_iterator_has_next(&lit)){ 3780 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3781 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3782 btstack_memory_whitelist_entry_free(entry); 3783 } 3784 } 3785 #endif 3786 #endif 3787 // close all open connections 3788 connection = (hci_connection_t *) hci_stack->connections; 3789 if (connection){ 3790 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3791 if (!hci_can_send_command_packet_now()) return; 3792 3793 // check state 3794 if (connection->state == SENT_DISCONNECT) return; 3795 connection->state = SENT_DISCONNECT; 3796 3797 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3798 3799 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3800 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3801 3802 // ... which would be ignored anyway as we shutdown (free) the connection now 3803 hci_shutdown_connection(connection); 3804 3805 // finally, send the disconnect command 3806 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3807 return; 3808 } 3809 3810 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 3811 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 3812 log_info("HCI_STATE_HALTING: wait 50 ms"); 3813 hci_stack->substate = HCI_HALTING_W4_TIMER; 3814 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 3815 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3816 btstack_run_loop_add_timer(&hci_stack->timeout); 3817 break; 3818 } 3819 3820 /* explicit fall-through */ 3821 3822 case HCI_HALTING_CLOSE: 3823 log_info("HCI_STATE_HALTING, calling off"); 3824 3825 // switch mode 3826 hci_power_control_off(); 3827 3828 log_info("HCI_STATE_HALTING, emitting state"); 3829 hci_emit_state(); 3830 log_info("HCI_STATE_HALTING, done"); 3831 break; 3832 3833 case HCI_HALTING_W4_TIMER: 3834 // keep waiting 3835 3836 break; 3837 default: 3838 break; 3839 } 3840 3841 break; 3842 3843 case HCI_STATE_FALLING_ASLEEP: 3844 switch(hci_stack->substate) { 3845 case HCI_FALLING_ASLEEP_DISCONNECT: 3846 log_info("HCI_STATE_FALLING_ASLEEP"); 3847 // close all open connections 3848 connection = (hci_connection_t *) hci_stack->connections; 3849 3850 #ifdef HAVE_PLATFORM_IPHONE_OS 3851 // don't close connections, if H4 supports power management 3852 if (btstack_control_iphone_power_management_enabled()){ 3853 connection = NULL; 3854 } 3855 #endif 3856 if (connection){ 3857 3858 // send disconnect 3859 if (!hci_can_send_command_packet_now()) return; 3860 3861 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3862 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3863 3864 // send disconnected event right away - causes higher layer connections to get closed, too. 3865 hci_shutdown_connection(connection); 3866 return; 3867 } 3868 3869 if (hci_classic_supported()){ 3870 // disable page and inquiry scan 3871 if (!hci_can_send_command_packet_now()) return; 3872 3873 log_info("HCI_STATE_HALTING, disabling inq scans"); 3874 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3875 3876 // continue in next sub state 3877 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3878 break; 3879 } 3880 // no break - fall through for ble-only chips 3881 3882 case HCI_FALLING_ASLEEP_COMPLETE: 3883 log_info("HCI_STATE_HALTING, calling sleep"); 3884 #ifdef HAVE_PLATFORM_IPHONE_OS 3885 // don't actually go to sleep, if H4 supports power management 3886 if (btstack_control_iphone_power_management_enabled()){ 3887 // SLEEP MODE reached 3888 hci_stack->state = HCI_STATE_SLEEPING; 3889 hci_emit_state(); 3890 break; 3891 } 3892 #endif 3893 // switch mode 3894 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3895 hci_emit_state(); 3896 break; 3897 3898 default: 3899 break; 3900 } 3901 break; 3902 3903 default: 3904 break; 3905 } 3906 } 3907 3908 int hci_send_cmd_packet(uint8_t *packet, int size){ 3909 // house-keeping 3910 3911 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3912 hci_stack->loopback_mode = packet[3]; 3913 } 3914 3915 #ifdef ENABLE_CLASSIC 3916 bd_addr_t addr; 3917 hci_connection_t * conn; 3918 3919 // create_connection? 3920 if (IS_COMMAND(packet, hci_create_connection)){ 3921 reverse_bd_addr(&packet[3], addr); 3922 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3923 3924 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3925 if (!conn){ 3926 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3927 if (!conn){ 3928 // notify client that alloc failed 3929 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3930 return -1; // packet not sent to controller 3931 } 3932 conn->state = SEND_CREATE_CONNECTION; 3933 } 3934 log_info("conn state %u", conn->state); 3935 switch (conn->state){ 3936 // if connection active exists 3937 case OPEN: 3938 // and OPEN, emit connection complete command 3939 hci_emit_connection_complete(addr, conn->con_handle, 0); 3940 return -1; // packet not sent to controller 3941 case SEND_CREATE_CONNECTION: 3942 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 3943 break; 3944 default: 3945 // otherwise, just ignore as it is already in the open process 3946 return -1; // packet not sent to controller 3947 } 3948 conn->state = SENT_CREATE_CONNECTION; 3949 3950 // track outgoing connection 3951 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 3952 memcpy(hci_stack->outgoing_addr, addr, 6); 3953 } 3954 3955 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3956 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3957 } 3958 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3959 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3960 } 3961 3962 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3963 if (hci_stack->link_key_db){ 3964 reverse_bd_addr(&packet[3], addr); 3965 hci_stack->link_key_db->delete_link_key(addr); 3966 } 3967 } 3968 3969 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3970 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3971 reverse_bd_addr(&packet[3], addr); 3972 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3973 if (conn){ 3974 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3975 } 3976 } 3977 3978 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3979 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3980 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3981 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3982 reverse_bd_addr(&packet[3], addr); 3983 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3984 if (conn){ 3985 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3986 } 3987 } 3988 3989 #ifdef ENABLE_SCO_OVER_HCI 3990 // setup_synchronous_connection? Voice setting at offset 22 3991 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3992 // TODO: compare to current setting if sco connection already active 3993 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3994 } 3995 // accept_synchronus_connection? Voice setting at offset 18 3996 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3997 // TODO: compare to current setting if sco connection already active 3998 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3999 } 4000 #endif 4001 #endif 4002 4003 #ifdef ENABLE_BLE 4004 if (IS_COMMAND(packet, hci_le_set_random_address)){ 4005 hci_stack->le_random_address_set = 1; 4006 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4007 } 4008 #ifdef ENABLE_LE_PERIPHERAL 4009 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 4010 hci_stack->le_advertisements_active = packet[3]; 4011 } 4012 #endif 4013 #ifdef ENABLE_LE_CENTRAL 4014 if (IS_COMMAND(packet, hci_le_create_connection)){ 4015 // white list used? 4016 uint8_t initiator_filter_policy = packet[7]; 4017 switch (initiator_filter_policy){ 4018 case 0: 4019 // whitelist not used 4020 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4021 break; 4022 case 1: 4023 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4024 break; 4025 default: 4026 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4027 break; 4028 } 4029 } 4030 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 4031 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4032 } 4033 #endif 4034 #endif 4035 4036 hci_stack->num_cmd_packets--; 4037 4038 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4039 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4040 } 4041 4042 // disconnect because of security block 4043 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4044 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4045 if (!connection) return; 4046 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4047 } 4048 4049 4050 // Configure Secure Simple Pairing 4051 4052 #ifdef ENABLE_CLASSIC 4053 4054 // enable will enable SSP during init 4055 void gap_ssp_set_enable(int enable){ 4056 hci_stack->ssp_enable = enable; 4057 } 4058 4059 static int hci_local_ssp_activated(void){ 4060 return gap_ssp_supported() && hci_stack->ssp_enable; 4061 } 4062 4063 // if set, BTstack will respond to io capability request using authentication requirement 4064 void gap_ssp_set_io_capability(int io_capability){ 4065 hci_stack->ssp_io_capability = io_capability; 4066 } 4067 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4068 hci_stack->ssp_authentication_requirement = authentication_requirement; 4069 } 4070 4071 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4072 void gap_ssp_set_auto_accept(int auto_accept){ 4073 hci_stack->ssp_auto_accept = auto_accept; 4074 } 4075 #endif 4076 4077 // va_list part of hci_send_cmd 4078 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4079 if (!hci_can_send_command_packet_now()){ 4080 log_error("hci_send_cmd called but cannot send packet now"); 4081 return 0; 4082 } 4083 4084 // for HCI INITIALIZATION 4085 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4086 hci_stack->last_cmd_opcode = cmd->opcode; 4087 4088 hci_reserve_packet_buffer(); 4089 uint8_t * packet = hci_stack->hci_packet_buffer; 4090 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4091 int err = hci_send_cmd_packet(packet, size); 4092 4093 // release packet buffer for synchronous transport implementations 4094 if (hci_transport_synchronous()){ 4095 hci_release_packet_buffer(); 4096 hci_emit_transport_packet_sent(); 4097 } 4098 4099 return err; 4100 } 4101 4102 /** 4103 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4104 */ 4105 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4106 va_list argptr; 4107 va_start(argptr, cmd); 4108 int res = hci_send_cmd_va_arg(cmd, argptr); 4109 va_end(argptr); 4110 return res; 4111 } 4112 4113 // Create various non-HCI events. 4114 // TODO: generalize, use table similar to hci_create_command 4115 4116 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4117 // dump packet 4118 if (dump) { 4119 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4120 } 4121 4122 // dispatch to all event handlers 4123 btstack_linked_list_iterator_t it; 4124 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4125 while (btstack_linked_list_iterator_has_next(&it)){ 4126 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4127 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4128 } 4129 } 4130 4131 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4132 if (!hci_stack->acl_packet_handler) return; 4133 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4134 } 4135 4136 #ifdef ENABLE_CLASSIC 4137 static void hci_notify_if_sco_can_send_now(void){ 4138 // notify SCO sender if waiting 4139 if (!hci_stack->sco_waiting_for_can_send_now) return; 4140 if (hci_can_send_sco_packet_now()){ 4141 hci_stack->sco_waiting_for_can_send_now = 0; 4142 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4143 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4144 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4145 } 4146 } 4147 4148 // parsing end emitting has been merged to reduce code size 4149 static void gap_inquiry_explode(uint8_t * packet){ 4150 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4151 4152 uint8_t * eir_data; 4153 ad_context_t context; 4154 const uint8_t * name; 4155 uint8_t name_len; 4156 4157 int event_type = hci_event_packet_get_type(packet); 4158 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4159 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4160 4161 // event[1] is set at the end 4162 int i; 4163 for (i=0; i<num_responses;i++){ 4164 memset(event, 0, sizeof(event)); 4165 event[0] = GAP_EVENT_INQUIRY_RESULT; 4166 uint8_t event_size = 18; // if name is not set by EIR 4167 4168 memcpy(&event[2], &packet[3 + (i*6)], 6); // bd_addr 4169 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4170 memcpy(&event[9], &packet[3 + (num_responses*(6+1+num_reserved_fields)) + (i*3)], 3); // class of device 4171 memcpy(&event[12], &packet[3 + (num_responses*(6+1+num_reserved_fields+3)) + (i*2)], 2); // clock offset 4172 4173 switch (event_type){ 4174 case HCI_EVENT_INQUIRY_RESULT: 4175 // 14,15,16,17 = 0, size 18 4176 break; 4177 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4178 event[14] = 1; 4179 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4180 // 16,17 = 0, size 18 4181 break; 4182 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4183 event[14] = 1; 4184 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4185 // for EIR packets, there is only one reponse in it 4186 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4187 name = NULL; 4188 // EIR data is 240 bytes in EIR event 4189 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4190 uint8_t data_type = ad_iterator_get_data_type(&context); 4191 uint8_t data_size = ad_iterator_get_data_len(&context); 4192 const uint8_t * data = ad_iterator_get_data(&context); 4193 // Prefer Complete Local Name over Shortend Local Name 4194 switch (data_type){ 4195 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4196 if (name) continue; 4197 /* explicit fall-through */ 4198 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4199 name = data; 4200 name_len = data_size; 4201 break; 4202 default: 4203 break; 4204 } 4205 } 4206 if (name){ 4207 event[16] = 1; 4208 // truncate name if needed 4209 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4210 event[17] = len; 4211 memcpy(&event[18], name, len); 4212 event_size += len; 4213 } 4214 break; 4215 } 4216 event[1] = event_size - 2; 4217 hci_emit_event(event, event_size, 1); 4218 } 4219 } 4220 #endif 4221 4222 void hci_emit_state(void){ 4223 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4224 uint8_t event[3]; 4225 event[0] = BTSTACK_EVENT_STATE; 4226 event[1] = sizeof(event) - 2; 4227 event[2] = hci_stack->state; 4228 hci_emit_event(event, sizeof(event), 1); 4229 } 4230 4231 #ifdef ENABLE_CLASSIC 4232 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4233 uint8_t event[13]; 4234 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4235 event[1] = sizeof(event) - 2; 4236 event[2] = status; 4237 little_endian_store_16(event, 3, con_handle); 4238 reverse_bd_addr(address, &event[5]); 4239 event[11] = 1; // ACL connection 4240 event[12] = 0; // encryption disabled 4241 hci_emit_event(event, sizeof(event), 1); 4242 } 4243 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4244 if (disable_l2cap_timeouts) return; 4245 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4246 uint8_t event[4]; 4247 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4248 event[1] = sizeof(event) - 2; 4249 little_endian_store_16(event, 2, conn->con_handle); 4250 hci_emit_event(event, sizeof(event), 1); 4251 } 4252 #endif 4253 4254 #ifdef ENABLE_BLE 4255 #ifdef ENABLE_LE_CENTRAL 4256 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4257 uint8_t event[21]; 4258 event[0] = HCI_EVENT_LE_META; 4259 event[1] = sizeof(event) - 2; 4260 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4261 event[3] = status; 4262 little_endian_store_16(event, 4, con_handle); 4263 event[6] = 0; // TODO: role 4264 event[7] = address_type; 4265 reverse_bd_addr(address, &event[8]); 4266 little_endian_store_16(event, 14, 0); // interval 4267 little_endian_store_16(event, 16, 0); // latency 4268 little_endian_store_16(event, 18, 0); // supervision timeout 4269 event[20] = 0; // master clock accuracy 4270 hci_emit_event(event, sizeof(event), 1); 4271 } 4272 #endif 4273 #endif 4274 4275 static void hci_emit_transport_packet_sent(void){ 4276 // notify upper stack that it might be possible to send again 4277 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4278 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4279 } 4280 4281 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4282 uint8_t event[6]; 4283 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4284 event[1] = sizeof(event) - 2; 4285 event[2] = 0; // status = OK 4286 little_endian_store_16(event, 3, con_handle); 4287 event[5] = reason; 4288 hci_emit_event(event, sizeof(event), 1); 4289 } 4290 4291 static void hci_emit_nr_connections_changed(void){ 4292 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4293 uint8_t event[3]; 4294 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4295 event[1] = sizeof(event) - 2; 4296 event[2] = nr_hci_connections(); 4297 hci_emit_event(event, sizeof(event), 1); 4298 } 4299 4300 static void hci_emit_hci_open_failed(void){ 4301 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4302 uint8_t event[2]; 4303 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4304 event[1] = sizeof(event) - 2; 4305 hci_emit_event(event, sizeof(event), 1); 4306 } 4307 4308 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4309 log_info("hci_emit_dedicated_bonding_result %u ", status); 4310 uint8_t event[9]; 4311 int pos = 0; 4312 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4313 event[pos++] = sizeof(event) - 2; 4314 event[pos++] = status; 4315 reverse_bd_addr(address, &event[pos]); 4316 hci_emit_event(event, sizeof(event), 1); 4317 } 4318 4319 4320 #ifdef ENABLE_CLASSIC 4321 4322 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4323 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4324 uint8_t event[5]; 4325 int pos = 0; 4326 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4327 event[pos++] = sizeof(event) - 2; 4328 little_endian_store_16(event, 2, con_handle); 4329 pos += 2; 4330 event[pos++] = level; 4331 hci_emit_event(event, sizeof(event), 1); 4332 } 4333 4334 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4335 if (!connection) return LEVEL_0; 4336 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4337 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4338 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4339 // LEVEL 4 always requires 128 bit encrytion key size 4340 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4341 security_level = LEVEL_3; 4342 } 4343 return security_level; 4344 } 4345 4346 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4347 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4348 uint8_t event[3]; 4349 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4350 event[1] = sizeof(event) - 2; 4351 event[2] = enabled; 4352 hci_emit_event(event, sizeof(event), 1); 4353 } 4354 4355 // query if remote side supports eSCO 4356 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4357 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4358 if (!connection) return 0; 4359 return connection->remote_supported_feature_eSCO; 4360 } 4361 4362 // query if remote side supports SSP 4363 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4364 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4365 if (!connection) return 0; 4366 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4367 } 4368 4369 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4370 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4371 } 4372 4373 // GAP API 4374 /** 4375 * @bbrief enable/disable bonding. default is enabled 4376 * @praram enabled 4377 */ 4378 void gap_set_bondable_mode(int enable){ 4379 hci_stack->bondable = enable ? 1 : 0; 4380 } 4381 /** 4382 * @brief Get bondable mode. 4383 * @return 1 if bondable 4384 */ 4385 int gap_get_bondable_mode(void){ 4386 return hci_stack->bondable; 4387 } 4388 4389 /** 4390 * @brief map link keys to security levels 4391 */ 4392 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4393 switch (link_key_type){ 4394 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4395 return LEVEL_4; 4396 case COMBINATION_KEY: 4397 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4398 return LEVEL_3; 4399 default: 4400 return LEVEL_2; 4401 } 4402 } 4403 4404 /** 4405 * @brief map link keys to secure connection yes/no 4406 */ 4407 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4408 switch (link_key_type){ 4409 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4410 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4411 return 1; 4412 default: 4413 return 0; 4414 } 4415 } 4416 4417 /** 4418 * @brief map link keys to authenticated 4419 */ 4420 int gap_authenticated_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 AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4424 return 1; 4425 default: 4426 return 0; 4427 } 4428 } 4429 4430 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4431 log_info("gap_mitm_protection_required_for_security_level %u", level); 4432 return level > LEVEL_2; 4433 } 4434 4435 /** 4436 * @brief get current security level 4437 */ 4438 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4439 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4440 if (!connection) return LEVEL_0; 4441 return gap_security_level_for_connection(connection); 4442 } 4443 4444 /** 4445 * @brief request connection to device to 4446 * @result GAP_AUTHENTICATION_RESULT 4447 */ 4448 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4449 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4450 if (!connection){ 4451 hci_emit_security_level(con_handle, LEVEL_0); 4452 return; 4453 } 4454 gap_security_level_t current_level = gap_security_level(con_handle); 4455 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4456 requested_level, connection->requested_security_level, current_level); 4457 4458 // assumption: earlier requested security higher than current level => security request is active 4459 if (current_level < connection->requested_security_level){ 4460 if (connection->requested_security_level < requested_level){ 4461 // increase requested level as new level is higher 4462 4463 // TODO: handle re-authentication when done 4464 4465 connection->requested_security_level = requested_level; 4466 } 4467 return; 4468 } 4469 4470 // no request active, notify if security sufficient 4471 if (requested_level <= current_level){ 4472 hci_emit_security_level(con_handle, current_level); 4473 return; 4474 } 4475 4476 // start pairing to increase security level 4477 connection->requested_security_level = requested_level; 4478 4479 #if 0 4480 // sending encryption request without a link key results in an error. 4481 // TODO: figure out how to use it properly 4482 4483 // would enabling ecnryption suffice (>= LEVEL_2)? 4484 if (hci_stack->link_key_db){ 4485 link_key_type_t link_key_type; 4486 link_key_t link_key; 4487 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4488 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4489 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4490 return; 4491 } 4492 } 4493 } 4494 #endif 4495 4496 // start to authenticate connection 4497 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4498 hci_run(); 4499 } 4500 4501 /** 4502 * @brief start dedicated bonding with device. disconnect after bonding 4503 * @param device 4504 * @param request MITM protection 4505 * @result GAP_DEDICATED_BONDING_COMPLETE 4506 */ 4507 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4508 4509 // create connection state machine 4510 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 4511 4512 if (!connection){ 4513 return BTSTACK_MEMORY_ALLOC_FAILED; 4514 } 4515 4516 // delete linkn key 4517 gap_drop_link_key_for_bd_addr(device); 4518 4519 // configure LEVEL_2/3, dedicated bonding 4520 connection->state = SEND_CREATE_CONNECTION; 4521 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4522 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4523 connection->bonding_flags = BONDING_DEDICATED; 4524 4525 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4526 4527 // handle: connnection failure (connection complete != ok) 4528 // handle: authentication failure 4529 // handle: disconnect on done 4530 4531 hci_run(); 4532 4533 return 0; 4534 } 4535 #endif 4536 4537 void gap_set_local_name(const char * local_name){ 4538 hci_stack->local_name = local_name; 4539 } 4540 4541 4542 #ifdef ENABLE_BLE 4543 4544 #ifdef ENABLE_LE_CENTRAL 4545 void gap_start_scan(void){ 4546 hci_stack->le_scanning_enabled = 1; 4547 hci_run(); 4548 } 4549 4550 void gap_stop_scan(void){ 4551 hci_stack->le_scanning_enabled = 0; 4552 hci_run(); 4553 } 4554 4555 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4556 hci_stack->le_scan_type = scan_type; 4557 hci_stack->le_scan_interval = scan_interval; 4558 hci_stack->le_scan_window = scan_window; 4559 hci_run(); 4560 } 4561 4562 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4563 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4564 if (!conn){ 4565 log_info("gap_connect: no connection exists yet, creating context"); 4566 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4567 if (!conn){ 4568 // notify client that alloc failed 4569 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4570 log_info("gap_connect: failed to alloc hci_connection_t"); 4571 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4572 } 4573 conn->state = SEND_CREATE_CONNECTION; 4574 log_info("gap_connect: send create connection next"); 4575 hci_run(); 4576 return 0; 4577 } 4578 4579 if (!hci_is_le_connection(conn) || 4580 (conn->state == SEND_CREATE_CONNECTION) || 4581 (conn->state == SENT_CREATE_CONNECTION)) { 4582 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4583 log_error("gap_connect: classic connection or connect is already being created"); 4584 return GATT_CLIENT_IN_WRONG_STATE; 4585 } 4586 4587 log_info("gap_connect: context exists with state %u", conn->state); 4588 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4589 hci_run(); 4590 return 0; 4591 } 4592 4593 // @assumption: only a single outgoing LE Connection exists 4594 static hci_connection_t * gap_get_outgoing_connection(void){ 4595 btstack_linked_item_t *it; 4596 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4597 hci_connection_t * conn = (hci_connection_t *) it; 4598 if (!hci_is_le_connection(conn)) continue; 4599 switch (conn->state){ 4600 case SEND_CREATE_CONNECTION: 4601 case SENT_CREATE_CONNECTION: 4602 case SENT_CANCEL_CONNECTION: 4603 return conn; 4604 default: 4605 break; 4606 }; 4607 } 4608 return NULL; 4609 } 4610 4611 uint8_t gap_connect_cancel(void){ 4612 hci_connection_t * conn = gap_get_outgoing_connection(); 4613 if (!conn) return 0; 4614 switch (conn->state){ 4615 case SEND_CREATE_CONNECTION: 4616 // skip sending create connection and emit event instead 4617 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4618 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4619 btstack_memory_hci_connection_free( conn ); 4620 break; 4621 case SENT_CREATE_CONNECTION: 4622 // request to send cancel connection 4623 conn->state = SEND_CANCEL_CONNECTION; 4624 hci_run(); 4625 break; 4626 default: 4627 break; 4628 } 4629 return 0; 4630 } 4631 #endif 4632 4633 #ifdef ENABLE_LE_CENTRAL 4634 /** 4635 * @brief Set connection parameters for outgoing connections 4636 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4637 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4638 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4639 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4640 * @param conn_latency, default: 4 4641 * @param supervision_timeout (unit: 10ms), default: 720 ms 4642 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4643 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4644 */ 4645 4646 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4647 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4648 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4649 hci_stack->le_connection_scan_interval = conn_scan_interval; 4650 hci_stack->le_connection_scan_window = conn_scan_window; 4651 hci_stack->le_connection_interval_min = conn_interval_min; 4652 hci_stack->le_connection_interval_max = conn_interval_max; 4653 hci_stack->le_connection_latency = conn_latency; 4654 hci_stack->le_supervision_timeout = supervision_timeout; 4655 hci_stack->le_minimum_ce_length = min_ce_length; 4656 hci_stack->le_maximum_ce_length = max_ce_length; 4657 } 4658 #endif 4659 4660 /** 4661 * @brief Updates the connection parameters for a given LE connection 4662 * @param handle 4663 * @param conn_interval_min (unit: 1.25ms) 4664 * @param conn_interval_max (unit: 1.25ms) 4665 * @param conn_latency 4666 * @param supervision_timeout (unit: 10ms) 4667 * @returns 0 if ok 4668 */ 4669 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4670 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4671 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4672 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4673 connection->le_conn_interval_min = conn_interval_min; 4674 connection->le_conn_interval_max = conn_interval_max; 4675 connection->le_conn_latency = conn_latency; 4676 connection->le_supervision_timeout = supervision_timeout; 4677 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4678 hci_run(); 4679 return 0; 4680 } 4681 4682 /** 4683 * @brief Request an update of the connection parameter for a given LE connection 4684 * @param handle 4685 * @param conn_interval_min (unit: 1.25ms) 4686 * @param conn_interval_max (unit: 1.25ms) 4687 * @param conn_latency 4688 * @param supervision_timeout (unit: 10ms) 4689 * @returns 0 if ok 4690 */ 4691 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4692 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4693 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4694 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4695 connection->le_conn_interval_min = conn_interval_min; 4696 connection->le_conn_interval_max = conn_interval_max; 4697 connection->le_conn_latency = conn_latency; 4698 connection->le_supervision_timeout = supervision_timeout; 4699 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4700 hci_run(); 4701 return 0; 4702 } 4703 4704 #ifdef ENABLE_LE_PERIPHERAL 4705 4706 static void gap_advertisments_changed(void){ 4707 // disable advertisements before updating adv, scan data, or adv params 4708 if (hci_stack->le_advertisements_active){ 4709 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4710 } 4711 hci_run(); 4712 } 4713 4714 /** 4715 * @brief Set Advertisement Data 4716 * @param advertising_data_length 4717 * @param advertising_data (max 31 octets) 4718 * @note data is not copied, pointer has to stay valid 4719 */ 4720 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4721 hci_stack->le_advertisements_data_len = advertising_data_length; 4722 hci_stack->le_advertisements_data = advertising_data; 4723 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4724 gap_advertisments_changed(); 4725 } 4726 4727 /** 4728 * @brief Set Scan Response 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_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4734 hci_stack->le_scan_response_data_len = scan_response_data_length; 4735 hci_stack->le_scan_response_data = scan_response_data; 4736 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4737 gap_advertisments_changed(); 4738 } 4739 4740 /** 4741 * @brief Set Advertisement Parameters 4742 * @param adv_int_min 4743 * @param adv_int_max 4744 * @param adv_type 4745 * @param direct_address_type 4746 * @param direct_address 4747 * @param channel_map 4748 * @param filter_policy 4749 * 4750 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4751 */ 4752 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4753 uint8_t direct_address_typ, bd_addr_t direct_address, 4754 uint8_t channel_map, uint8_t filter_policy) { 4755 4756 hci_stack->le_advertisements_interval_min = adv_int_min; 4757 hci_stack->le_advertisements_interval_max = adv_int_max; 4758 hci_stack->le_advertisements_type = adv_type; 4759 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4760 hci_stack->le_advertisements_channel_map = channel_map; 4761 hci_stack->le_advertisements_filter_policy = filter_policy; 4762 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4763 4764 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4765 gap_advertisments_changed(); 4766 } 4767 4768 /** 4769 * @brief Enable/Disable Advertisements 4770 * @param enabled 4771 */ 4772 void gap_advertisements_enable(int enabled){ 4773 hci_stack->le_advertisements_enabled = enabled; 4774 if (enabled && !hci_stack->le_advertisements_active){ 4775 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4776 } 4777 if (!enabled && hci_stack->le_advertisements_active){ 4778 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4779 } 4780 hci_run(); 4781 } 4782 4783 #endif 4784 4785 void hci_le_set_own_address_type(uint8_t own_address_type){ 4786 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4787 if (own_address_type == hci_stack->le_own_addr_type) return; 4788 hci_stack->le_own_addr_type = own_address_type; 4789 4790 #ifdef ENABLE_LE_PERIPHERAL 4791 // update advertisement parameters, too 4792 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4793 gap_advertisments_changed(); 4794 #endif 4795 #ifdef ENABLE_LE_CENTRAL 4796 // note: we don't update scan parameters or modify ongoing connection attempts 4797 #endif 4798 } 4799 4800 #endif 4801 4802 uint8_t gap_disconnect(hci_con_handle_t handle){ 4803 hci_connection_t * conn = hci_connection_for_handle(handle); 4804 if (!conn){ 4805 hci_emit_disconnection_complete(handle, 0); 4806 return 0; 4807 } 4808 // ignore if already disconnected 4809 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4810 return 0; 4811 } 4812 conn->state = SEND_DISCONNECT; 4813 hci_run(); 4814 return 0; 4815 } 4816 4817 int gap_read_rssi(hci_con_handle_t con_handle){ 4818 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 4819 if (hci_connection == NULL) return 0; 4820 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 4821 hci_run(); 4822 return 1; 4823 } 4824 4825 /** 4826 * @brief Get connection type 4827 * @param con_handle 4828 * @result connection_type 4829 */ 4830 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4831 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4832 if (!conn) return GAP_CONNECTION_INVALID; 4833 switch (conn->address_type){ 4834 case BD_ADDR_TYPE_LE_PUBLIC: 4835 case BD_ADDR_TYPE_LE_RANDOM: 4836 return GAP_CONNECTION_LE; 4837 case BD_ADDR_TYPE_SCO: 4838 return GAP_CONNECTION_SCO; 4839 case BD_ADDR_TYPE_ACL: 4840 return GAP_CONNECTION_ACL; 4841 default: 4842 return GAP_CONNECTION_INVALID; 4843 } 4844 } 4845 4846 #ifdef ENABLE_BLE 4847 4848 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){ 4849 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4850 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4851 4852 conn->le_phy_update_all_phys = all_phys; 4853 conn->le_phy_update_tx_phys = tx_phys; 4854 conn->le_phy_update_rx_phys = rx_phys; 4855 conn->le_phy_update_phy_options = phy_options; 4856 4857 hci_run(); 4858 4859 return 0; 4860 } 4861 4862 #ifdef ENABLE_LE_CENTRAL 4863 /** 4864 * @brief Auto Connection Establishment - Start Connecting to device 4865 * @param address_typ 4866 * @param address 4867 * @returns 0 if ok 4868 */ 4869 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4870 // check capacity 4871 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4872 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4873 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4874 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4875 entry->address_type = address_type; 4876 memcpy(entry->address, address, 6); 4877 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4878 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4879 hci_run(); 4880 return 0; 4881 } 4882 4883 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4884 btstack_linked_list_iterator_t it; 4885 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4886 while (btstack_linked_list_iterator_has_next(&it)){ 4887 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4888 if (entry->address_type != address_type) continue; 4889 if (memcmp(entry->address, address, 6) != 0) continue; 4890 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4891 // remove from controller if already present 4892 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4893 continue; 4894 } 4895 // direclty remove entry from whitelist 4896 btstack_linked_list_iterator_remove(&it); 4897 btstack_memory_whitelist_entry_free(entry); 4898 } 4899 } 4900 4901 /** 4902 * @brief Auto Connection Establishment - Stop Connecting to device 4903 * @param address_typ 4904 * @param address 4905 * @returns 0 if ok 4906 */ 4907 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4908 hci_remove_from_whitelist(address_type, address); 4909 hci_run(); 4910 return 0; 4911 } 4912 4913 /** 4914 * @brief Auto Connection Establishment - Stop everything 4915 * @note Convenience function to stop all active auto connection attempts 4916 */ 4917 void gap_auto_connection_stop_all(void){ 4918 btstack_linked_list_iterator_t it; 4919 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4920 while (btstack_linked_list_iterator_has_next(&it)){ 4921 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4922 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4923 // remove from controller if already present 4924 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4925 continue; 4926 } 4927 // directly remove entry from whitelist 4928 btstack_linked_list_iterator_remove(&it); 4929 btstack_memory_whitelist_entry_free(entry); 4930 } 4931 hci_run(); 4932 } 4933 4934 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 4935 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4936 if (!conn) return 0; 4937 return conn->le_connection_interval; 4938 } 4939 #endif 4940 #endif 4941 4942 #ifdef ENABLE_CLASSIC 4943 /** 4944 * @brief Set Extended Inquiry Response data 4945 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4946 * @note has to be done before stack starts up 4947 */ 4948 void gap_set_extended_inquiry_response(const uint8_t * data){ 4949 hci_stack->eir_data = data; 4950 } 4951 4952 /** 4953 * @brief Start GAP Classic Inquiry 4954 * @param duration in 1.28s units 4955 * @return 0 if ok 4956 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4957 */ 4958 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4959 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 4960 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4961 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 4962 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4963 } 4964 hci_stack->inquiry_state = duration_in_1280ms_units; 4965 hci_run(); 4966 return 0; 4967 } 4968 4969 /** 4970 * @brief Stop GAP Classic Inquiry 4971 * @returns 0 if ok 4972 */ 4973 int gap_inquiry_stop(void){ 4974 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 4975 // emit inquiry complete event, before it even started 4976 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4977 hci_emit_event(event, sizeof(event), 1); 4978 return 0; 4979 } 4980 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4981 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4982 hci_run(); 4983 return 0; 4984 } 4985 4986 4987 /** 4988 * @brief Remote Name Request 4989 * @param addr 4990 * @param page_scan_repetition_mode 4991 * @param clock_offset only used when bit 15 is set 4992 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4993 */ 4994 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4995 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4996 memcpy(hci_stack->remote_name_addr, addr, 6); 4997 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4998 hci_stack->remote_name_clock_offset = clock_offset; 4999 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5000 hci_run(); 5001 return 0; 5002 } 5003 5004 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 5005 hci_stack->gap_pairing_state = state; 5006 memcpy(hci_stack->gap_pairing_addr, addr, 6); 5007 hci_run(); 5008 return 0; 5009 } 5010 5011 /** 5012 * @brief Legacy Pairing Pin Code Response 5013 * @param addr 5014 * @param pin 5015 * @return 0 if ok 5016 */ 5017 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 5018 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5019 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 5020 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5021 } 5022 5023 /** 5024 * @brief Abort Legacy Pairing 5025 * @param addr 5026 * @param pin 5027 * @return 0 if ok 5028 */ 5029 int gap_pin_code_negative(bd_addr_t addr){ 5030 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5031 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5032 } 5033 5034 /** 5035 * @brief SSP Passkey Response 5036 * @param addr 5037 * @param passkey 5038 * @return 0 if ok 5039 */ 5040 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5041 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5042 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5043 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5044 } 5045 5046 /** 5047 * @brief Abort SSP Passkey Entry/Pairing 5048 * @param addr 5049 * @param pin 5050 * @return 0 if ok 5051 */ 5052 int gap_ssp_passkey_negative(bd_addr_t addr){ 5053 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5054 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5055 } 5056 5057 /** 5058 * @brief Accept SSP Numeric Comparison 5059 * @param addr 5060 * @param passkey 5061 * @return 0 if ok 5062 */ 5063 int gap_ssp_confirmation_response(bd_addr_t addr){ 5064 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5065 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5066 } 5067 5068 /** 5069 * @brief Abort SSP Numeric Comparison/Pairing 5070 * @param addr 5071 * @param pin 5072 * @return 0 if ok 5073 */ 5074 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5075 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5076 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5077 } 5078 5079 /** 5080 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5081 * @param inquiry_mode see bluetooth_defines.h 5082 */ 5083 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5084 hci_stack->inquiry_mode = mode; 5085 } 5086 5087 /** 5088 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5089 */ 5090 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5091 hci_stack->sco_voice_setting = voice_setting; 5092 } 5093 5094 /** 5095 * @brief Get SCO Voice Setting 5096 * @return current voice setting 5097 */ 5098 uint16_t hci_get_sco_voice_setting(void){ 5099 return hci_stack->sco_voice_setting; 5100 } 5101 5102 static int hci_have_usb_transport(void){ 5103 if (!hci_stack->hci_transport) return 0; 5104 const char * transport_name = hci_stack->hci_transport->name; 5105 if (!transport_name) return 0; 5106 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5107 } 5108 5109 /** @brief Get SCO packet length for current SCO Voice setting 5110 * @note Using SCO packets of the exact length is required for USB transfer 5111 * @return Length of SCO packets in bytes (not audio frames) 5112 */ 5113 int hci_get_sco_packet_length(void){ 5114 int sco_packet_length = 0; 5115 5116 #ifdef ENABLE_SCO_OVER_HCI 5117 5118 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5119 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5120 5121 if (hci_have_usb_transport()){ 5122 // see Core Spec for H2 USB Transfer. 5123 // 3 byte SCO header + 24 bytes per connection 5124 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5125 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5126 } else { 5127 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5128 sco_packet_length = 3 + 60 * multiplier; 5129 // assert that it still fits inside an SCO buffer 5130 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5131 sco_packet_length = 3 + 60; 5132 } 5133 } 5134 #endif 5135 return sco_packet_length; 5136 } 5137 5138 /** 5139 * @brief Sets the master/slave policy 5140 * @param policy (0: attempt to become master, 1: let connecting device decide) 5141 */ 5142 void hci_set_master_slave_policy(uint8_t policy){ 5143 hci_stack->master_slave_policy = policy; 5144 } 5145 5146 #endif 5147 5148 HCI_STATE hci_get_state(void){ 5149 return hci_stack->state; 5150 } 5151 5152 #ifdef ENABLE_CLASSIC 5153 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5154 hci_stack->gap_classic_accept_callback = accept_callback; 5155 } 5156 #endif 5157 5158 /** 5159 * @brief Set callback for Bluetooth Hardware Error 5160 */ 5161 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5162 hci_stack->hardware_error_callback = fn; 5163 } 5164 5165 void hci_disconnect_all(void){ 5166 btstack_linked_list_iterator_t it; 5167 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5168 while (btstack_linked_list_iterator_has_next(&it)){ 5169 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5170 if (con->state == SENT_DISCONNECT) continue; 5171 con->state = SEND_DISCONNECT; 5172 } 5173 hci_run(); 5174 } 5175 5176 uint16_t hci_get_manufacturer(void){ 5177 return hci_stack->manufacturer; 5178 } 5179 5180 #ifdef ENABLE_BLE 5181 5182 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5183 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5184 if (!hci_con) return NULL; 5185 return &hci_con->sm_connection; 5186 } 5187 5188 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5189 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5190 5191 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5192 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5193 if (hci_connection == NULL) return 0; 5194 if (hci_is_le_connection(hci_connection)){ 5195 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5196 if (sm_conn->sm_connection_encrypted) { 5197 return sm_conn->sm_actual_encryption_key_size; 5198 } 5199 } 5200 #ifdef ENABLE_CLASSIC 5201 else { 5202 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5203 return hci_connection->encryption_key_size; 5204 } 5205 } 5206 #endif 5207 return 0; 5208 } 5209 5210 int gap_authenticated(hci_con_handle_t con_handle){ 5211 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5212 if (hci_connection == NULL) return 0; 5213 5214 switch (hci_connection->address_type){ 5215 case BD_ADDR_TYPE_LE_PUBLIC: 5216 case BD_ADDR_TYPE_LE_RANDOM: 5217 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5218 return hci_connection->sm_connection.sm_connection_authenticated; 5219 #ifdef ENABLE_CLASSIC 5220 case BD_ADDR_TYPE_SCO: 5221 case BD_ADDR_TYPE_ACL: 5222 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5223 #endif 5224 default: 5225 return 0; 5226 } 5227 } 5228 5229 int gap_secure_connection(hci_con_handle_t con_handle){ 5230 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5231 if (hci_connection == NULL) return 0; 5232 5233 switch (hci_connection->address_type){ 5234 case BD_ADDR_TYPE_LE_PUBLIC: 5235 case BD_ADDR_TYPE_LE_RANDOM: 5236 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5237 return hci_connection->sm_connection.sm_connection_sc; 5238 #ifdef ENABLE_CLASSIC 5239 case BD_ADDR_TYPE_SCO: 5240 case BD_ADDR_TYPE_ACL: 5241 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5242 #endif 5243 default: 5244 return 0; 5245 } 5246 } 5247 5248 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5249 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5250 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5251 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5252 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5253 return sm_conn->sm_connection_authorization_state; 5254 } 5255 #endif 5256 5257 #ifdef ENABLE_CLASSIC 5258 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){ 5259 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5260 if (!conn) return GAP_CONNECTION_INVALID; 5261 conn->sniff_min_interval = sniff_min_interval; 5262 conn->sniff_max_interval = sniff_max_interval; 5263 conn->sniff_attempt = sniff_attempt; 5264 conn->sniff_timeout = sniff_timeout; 5265 hci_run(); 5266 return 0; 5267 } 5268 5269 /** 5270 * @brief Exit Sniff mode 5271 * @param con_handle 5272 @ @return 0 if ok 5273 */ 5274 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5275 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5276 if (!conn) return GAP_CONNECTION_INVALID; 5277 conn->sniff_min_interval = 0xffff; 5278 hci_run(); 5279 return 0; 5280 } 5281 #endif 5282 5283 void hci_halting_defer(void){ 5284 if (hci_stack->state != HCI_STATE_HALTING) return; 5285 switch (hci_stack->substate){ 5286 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5287 case HCI_HALTING_CLOSE: 5288 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5289 break; 5290 default: 5291 break; 5292 } 5293 } 5294