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_BLE 158 #ifdef ENABLE_LE_CENTRAL 159 // called from test/ble_client/advertising_data_parser.c 160 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 161 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 162 static hci_connection_t * gap_get_outgoing_connection(void); 163 #endif 164 #endif 165 166 // the STACK is here 167 #ifndef HAVE_MALLOC 168 static hci_stack_t hci_stack_static; 169 #endif 170 static hci_stack_t * hci_stack = NULL; 171 172 #ifdef ENABLE_CLASSIC 173 // default name 174 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 175 176 // test helper 177 static uint8_t disable_l2cap_timeouts = 0; 178 #endif 179 180 /** 181 * create connection for given address 182 * 183 * @return connection OR NULL, if no memory left 184 */ 185 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 186 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 187 hci_connection_t * conn = btstack_memory_hci_connection_get(); 188 if (!conn) return NULL; 189 memset(conn, 0, sizeof(hci_connection_t)); 190 bd_addr_copy(conn->address, addr); 191 conn->address_type = addr_type; 192 conn->con_handle = 0xffff; 193 conn->authentication_flags = AUTH_FLAGS_NONE; 194 conn->bonding_flags = 0; 195 conn->requested_security_level = LEVEL_0; 196 #ifdef ENABLE_CLASSIC 197 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 198 btstack_run_loop_set_timer_context(&conn->timeout, conn); 199 hci_connection_timestamp(conn); 200 #endif 201 conn->acl_recombination_length = 0; 202 conn->acl_recombination_pos = 0; 203 conn->num_acl_packets_sent = 0; 204 conn->num_sco_packets_sent = 0; 205 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 206 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 207 return conn; 208 } 209 210 211 /** 212 * get le connection parameter range 213 * 214 * @return le connection parameter range struct 215 */ 216 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 217 *range = hci_stack->le_connection_parameter_range; 218 } 219 220 /** 221 * set le connection parameter range 222 * 223 */ 224 225 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 226 hci_stack->le_connection_parameter_range = *range; 227 } 228 229 /** 230 * @brief Test if connection parameters are inside in existing rage 231 * @param conn_interval_min (unit: 1.25ms) 232 * @param conn_interval_max (unit: 1.25ms) 233 * @param conn_latency 234 * @param supervision_timeout (unit: 10ms) 235 * @returns 1 if included 236 */ 237 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){ 238 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 239 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 240 241 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 242 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 243 244 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 245 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 246 247 return 1; 248 } 249 250 /** 251 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 252 * @note: default: 1 253 * @param max_peripheral_connections 254 */ 255 #ifdef ENABLE_LE_PERIPHERAL 256 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 257 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 258 } 259 #endif 260 261 /** 262 * get hci connections iterator 263 * 264 * @return hci connections iterator 265 */ 266 267 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 268 btstack_linked_list_iterator_init(it, &hci_stack->connections); 269 } 270 271 /** 272 * get connection for a given handle 273 * 274 * @return connection OR NULL, if not found 275 */ 276 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 277 btstack_linked_list_iterator_t it; 278 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 279 while (btstack_linked_list_iterator_has_next(&it)){ 280 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 281 if ( item->con_handle == con_handle ) { 282 return item; 283 } 284 } 285 return NULL; 286 } 287 288 /** 289 * get connection for given address 290 * 291 * @return connection OR NULL, if not found 292 */ 293 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 294 btstack_linked_list_iterator_t it; 295 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 296 while (btstack_linked_list_iterator_has_next(&it)){ 297 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 298 if (connection->address_type != addr_type) continue; 299 if (memcmp(addr, connection->address, 6) != 0) continue; 300 return connection; 301 } 302 return NULL; 303 } 304 305 306 #ifdef ENABLE_CLASSIC 307 308 #ifdef ENABLE_SCO_OVER_HCI 309 static int hci_number_sco_connections(void){ 310 int connections = 0; 311 btstack_linked_list_iterator_t it; 312 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 313 while (btstack_linked_list_iterator_has_next(&it)){ 314 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 315 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 316 connections++; 317 } 318 return connections; 319 } 320 #endif 321 322 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 323 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 324 #ifdef HAVE_EMBEDDED_TICK 325 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 326 // connections might be timed out 327 hci_emit_l2cap_check_timeout(connection); 328 } 329 #else 330 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 331 // connections might be timed out 332 hci_emit_l2cap_check_timeout(connection); 333 } 334 #endif 335 } 336 337 static void hci_connection_timestamp(hci_connection_t *connection){ 338 #ifdef HAVE_EMBEDDED_TICK 339 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 340 #else 341 connection->timestamp = btstack_run_loop_get_time_ms(); 342 #endif 343 } 344 345 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 346 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 347 } 348 349 350 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 351 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 352 } 353 354 /** 355 * add authentication flags and reset timer 356 * @note: assumes classic connection 357 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 358 */ 359 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 360 bd_addr_t addr; 361 reverse_bd_addr(bd_addr, addr); 362 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 363 if (conn) { 364 connectionSetAuthenticationFlags(conn, flags); 365 hci_connection_timestamp(conn); 366 } 367 } 368 369 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 370 hci_connection_t * conn = hci_connection_for_handle(handle); 371 if (!conn) return 0; 372 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 373 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 374 return 0; 375 } 376 377 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 378 if (!hci_stack->link_key_db) return; 379 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 380 hci_stack->link_key_db->delete_link_key(addr); 381 } 382 383 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 384 if (!hci_stack->link_key_db) return; 385 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 386 hci_stack->link_key_db->put_link_key(addr, link_key, type); 387 } 388 389 void gap_delete_all_link_keys(void){ 390 bd_addr_t addr; 391 link_key_t link_key; 392 link_key_type_t type; 393 btstack_link_key_iterator_t it; 394 int ok = gap_link_key_iterator_init(&it); 395 if (!ok) { 396 log_error("could not initialize iterator"); 397 return; 398 } 399 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 400 gap_drop_link_key_for_bd_addr(addr); 401 } 402 gap_link_key_iterator_done(&it); 403 } 404 405 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 406 if (!hci_stack->link_key_db) return 0; 407 if (!hci_stack->link_key_db->iterator_init) return 0; 408 return hci_stack->link_key_db->iterator_init(it); 409 } 410 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){ 411 if (!hci_stack->link_key_db) return 0; 412 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 413 } 414 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 415 if (!hci_stack->link_key_db) return; 416 hci_stack->link_key_db->iterator_done(it); 417 } 418 #endif 419 420 static int hci_is_le_connection(hci_connection_t * connection){ 421 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 422 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 423 } 424 425 /** 426 * count connections 427 */ 428 static int nr_hci_connections(void){ 429 int count = 0; 430 btstack_linked_item_t *it; 431 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 432 return count; 433 } 434 435 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 436 437 unsigned int num_packets_sent_classic = 0; 438 unsigned int num_packets_sent_le = 0; 439 440 btstack_linked_item_t *it; 441 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 442 hci_connection_t * connection = (hci_connection_t *) it; 443 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 444 num_packets_sent_classic += connection->num_acl_packets_sent; 445 } else { 446 num_packets_sent_le += connection->num_acl_packets_sent; 447 } 448 } 449 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 450 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 451 int free_slots_le = 0; 452 453 if (free_slots_classic < 0){ 454 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); 455 return 0; 456 } 457 458 if (hci_stack->le_acl_packets_total_num){ 459 // if we have LE slots, they are used 460 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 461 if (free_slots_le < 0){ 462 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); 463 return 0; 464 } 465 } else { 466 // otherwise, classic slots are used for LE, too 467 free_slots_classic -= num_packets_sent_le; 468 if (free_slots_classic < 0){ 469 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); 470 return 0; 471 } 472 } 473 474 switch (address_type){ 475 case BD_ADDR_TYPE_UNKNOWN: 476 log_error("hci_number_free_acl_slots: unknown address type"); 477 return 0; 478 479 case BD_ADDR_TYPE_CLASSIC: 480 return free_slots_classic; 481 482 default: 483 if (hci_stack->le_acl_packets_total_num){ 484 return free_slots_le; 485 } 486 return free_slots_classic; 487 } 488 } 489 490 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 491 // get connection type 492 hci_connection_t * connection = hci_connection_for_handle(con_handle); 493 if (!connection){ 494 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 495 return 0; 496 } 497 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 498 } 499 500 #ifdef ENABLE_CLASSIC 501 static int hci_number_free_sco_slots(void){ 502 unsigned int num_sco_packets_sent = 0; 503 btstack_linked_item_t *it; 504 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 505 hci_connection_t * connection = (hci_connection_t *) it; 506 num_sco_packets_sent += connection->num_sco_packets_sent; 507 } 508 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 509 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 510 return 0; 511 } 512 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 513 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 514 } 515 #endif 516 517 // only used to send HCI Host Number Completed Packets 518 static int hci_can_send_comand_packet_transport(void){ 519 if (hci_stack->hci_packet_buffer_reserved) return 0; 520 521 // check for async hci transport implementations 522 if (hci_stack->hci_transport->can_send_packet_now){ 523 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 524 return 0; 525 } 526 } 527 return 1; 528 } 529 530 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 531 int hci_can_send_command_packet_now(void){ 532 if (hci_can_send_comand_packet_transport() == 0) return 0; 533 return hci_stack->num_cmd_packets > 0; 534 } 535 536 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 537 // check for async hci transport implementations 538 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 539 return hci_stack->hci_transport->can_send_packet_now(packet_type); 540 } 541 542 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 543 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 544 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 545 } 546 547 int hci_can_send_acl_le_packet_now(void){ 548 if (hci_stack->hci_packet_buffer_reserved) return 0; 549 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 550 } 551 552 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 553 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 554 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 555 } 556 557 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 558 if (hci_stack->hci_packet_buffer_reserved) return 0; 559 return hci_can_send_prepared_acl_packet_now(con_handle); 560 } 561 562 #ifdef ENABLE_CLASSIC 563 int hci_can_send_acl_classic_packet_now(void){ 564 if (hci_stack->hci_packet_buffer_reserved) return 0; 565 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 566 } 567 568 int hci_can_send_prepared_sco_packet_now(void){ 569 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 570 if (!hci_stack->synchronous_flow_control_enabled) return 1; 571 return hci_number_free_sco_slots() > 0; 572 } 573 574 int hci_can_send_sco_packet_now(void){ 575 if (hci_stack->hci_packet_buffer_reserved) return 0; 576 return hci_can_send_prepared_sco_packet_now(); 577 } 578 579 void hci_request_sco_can_send_now_event(void){ 580 hci_stack->sco_waiting_for_can_send_now = 1; 581 hci_notify_if_sco_can_send_now(); 582 } 583 #endif 584 585 // used for internal checks in l2cap.c 586 int hci_is_packet_buffer_reserved(void){ 587 return hci_stack->hci_packet_buffer_reserved; 588 } 589 590 // reserves outgoing packet buffer. @returns 1 if successful 591 int hci_reserve_packet_buffer(void){ 592 if (hci_stack->hci_packet_buffer_reserved) { 593 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 594 return 0; 595 } 596 hci_stack->hci_packet_buffer_reserved = 1; 597 return 1; 598 } 599 600 void hci_release_packet_buffer(void){ 601 hci_stack->hci_packet_buffer_reserved = 0; 602 } 603 604 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 605 static int hci_transport_synchronous(void){ 606 return hci_stack->hci_transport->can_send_packet_now == NULL; 607 } 608 609 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 610 611 // 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); 612 613 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 614 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 615 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 616 max_acl_data_packet_length = hci_stack->le_data_packets_length; 617 } 618 619 // testing: reduce buffer to minimum 620 // max_acl_data_packet_length = 52; 621 622 log_debug("hci_send_acl_packet_fragments entered"); 623 624 int err; 625 // multiple packets could be send on a synchronous HCI transport 626 while (1){ 627 628 log_debug("hci_send_acl_packet_fragments loop entered"); 629 630 // get current data 631 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 632 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 633 int more_fragments = 0; 634 635 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 636 if (current_acl_data_packet_length > max_acl_data_packet_length){ 637 more_fragments = 1; 638 current_acl_data_packet_length = max_acl_data_packet_length; 639 } 640 641 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 642 if (acl_header_pos > 0){ 643 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 644 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 645 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 646 } 647 648 // update header len 649 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 650 651 // count packet 652 connection->num_acl_packets_sent++; 653 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 654 655 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 656 if (more_fragments){ 657 // update start of next fragment to send 658 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 659 } else { 660 // done 661 hci_stack->acl_fragmentation_pos = 0; 662 hci_stack->acl_fragmentation_total_size = 0; 663 } 664 665 // send packet 666 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 667 const int size = current_acl_data_packet_length + 4; 668 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 669 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 670 671 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 672 673 // done yet? 674 if (!more_fragments) break; 675 676 // can send more? 677 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 678 } 679 680 log_debug("hci_send_acl_packet_fragments loop over"); 681 682 // release buffer now for synchronous transport 683 if (hci_transport_synchronous()){ 684 hci_release_packet_buffer(); 685 hci_emit_transport_packet_sent(); 686 } 687 688 return err; 689 } 690 691 // pre: caller has reserved the packet buffer 692 int hci_send_acl_packet_buffer(int size){ 693 694 // log_info("hci_send_acl_packet_buffer size %u", size); 695 696 if (!hci_stack->hci_packet_buffer_reserved) { 697 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 698 return 0; 699 } 700 701 uint8_t * packet = hci_stack->hci_packet_buffer; 702 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 703 704 // check for free places on Bluetooth module 705 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 706 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 707 hci_release_packet_buffer(); 708 hci_emit_transport_packet_sent(); 709 return BTSTACK_ACL_BUFFERS_FULL; 710 } 711 712 hci_connection_t *connection = hci_connection_for_handle( con_handle); 713 if (!connection) { 714 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 715 hci_release_packet_buffer(); 716 hci_emit_transport_packet_sent(); 717 return 0; 718 } 719 720 #ifdef ENABLE_CLASSIC 721 hci_connection_timestamp(connection); 722 #endif 723 724 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 725 726 // setup data 727 hci_stack->acl_fragmentation_total_size = size; 728 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 729 730 return hci_send_acl_packet_fragments(connection); 731 } 732 733 #ifdef ENABLE_CLASSIC 734 // pre: caller has reserved the packet buffer 735 int hci_send_sco_packet_buffer(int size){ 736 737 // log_info("hci_send_acl_packet_buffer size %u", size); 738 739 if (!hci_stack->hci_packet_buffer_reserved) { 740 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 741 return 0; 742 } 743 744 uint8_t * packet = hci_stack->hci_packet_buffer; 745 746 // skip checks in loopback mode 747 if (!hci_stack->loopback_mode){ 748 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 749 750 // check for free places on Bluetooth module 751 if (!hci_can_send_prepared_sco_packet_now()) { 752 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 753 hci_release_packet_buffer(); 754 hci_emit_transport_packet_sent(); 755 return BTSTACK_ACL_BUFFERS_FULL; 756 } 757 758 // track send packet in connection struct 759 hci_connection_t *connection = hci_connection_for_handle( con_handle); 760 if (!connection) { 761 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 762 hci_release_packet_buffer(); 763 hci_emit_transport_packet_sent(); 764 return 0; 765 } 766 connection->num_sco_packets_sent++; 767 } 768 769 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 770 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 771 772 if (hci_transport_synchronous()){ 773 hci_release_packet_buffer(); 774 hci_emit_transport_packet_sent(); 775 } 776 777 return err; 778 } 779 #endif 780 781 static void acl_handler(uint8_t *packet, int size){ 782 783 // log_info("acl_handler: size %u", size); 784 785 // get info 786 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 787 hci_connection_t *conn = hci_connection_for_handle(con_handle); 788 uint8_t acl_flags = READ_ACL_FLAGS(packet); 789 uint16_t acl_length = READ_ACL_LENGTH(packet); 790 791 // ignore non-registered handle 792 if (!conn){ 793 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 794 return; 795 } 796 797 // assert packet is complete 798 if (acl_length + 4 != size){ 799 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 800 return; 801 } 802 803 #ifdef ENABLE_CLASSIC 804 // update idle timestamp 805 hci_connection_timestamp(conn); 806 #endif 807 808 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 809 hci_stack->host_completed_packets = 1; 810 conn->num_packets_completed++; 811 #endif 812 813 // handle different packet types 814 switch (acl_flags & 0x03) { 815 816 case 0x01: // continuation fragment 817 818 // sanity checks 819 if (conn->acl_recombination_pos == 0) { 820 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 821 return; 822 } 823 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 824 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 825 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 826 conn->acl_recombination_pos = 0; 827 return; 828 } 829 830 // append fragment payload (header already stored) 831 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 832 conn->acl_recombination_pos += acl_length; 833 834 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 835 // conn->acl_recombination_pos, conn->acl_recombination_length); 836 837 // forward complete L2CAP packet if complete. 838 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 839 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 840 // reset recombination buffer 841 conn->acl_recombination_length = 0; 842 conn->acl_recombination_pos = 0; 843 } 844 break; 845 846 case 0x02: { // first fragment 847 848 // sanity check 849 if (conn->acl_recombination_pos) { 850 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 851 conn->acl_recombination_pos = 0; 852 } 853 854 // peek into L2CAP packet! 855 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 856 857 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 858 859 // compare fragment size to L2CAP packet size 860 if (acl_length >= l2cap_length + 4){ 861 // forward fragment as L2CAP packet 862 hci_emit_acl_packet(packet, acl_length + 4); 863 } else { 864 865 if (acl_length > HCI_ACL_BUFFER_SIZE){ 866 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 867 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 868 return; 869 } 870 871 // store first fragment and tweak acl length for complete package 872 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 873 conn->acl_recombination_pos = acl_length + 4; 874 conn->acl_recombination_length = l2cap_length; 875 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 876 } 877 break; 878 879 } 880 default: 881 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 882 return; 883 } 884 885 // execute main loop 886 hci_run(); 887 } 888 889 static void hci_shutdown_connection(hci_connection_t *conn){ 890 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 891 892 #ifdef ENABLE_CLASSIC 893 #ifdef ENABLE_SCO_OVER_HCI 894 int addr_type = conn->address_type; 895 #endif 896 #endif 897 898 btstack_run_loop_remove_timer(&conn->timeout); 899 900 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 901 btstack_memory_hci_connection_free( conn ); 902 903 // now it's gone 904 hci_emit_nr_connections_changed(); 905 906 #ifdef ENABLE_CLASSIC 907 #ifdef ENABLE_SCO_OVER_HCI 908 // update SCO 909 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 910 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 911 } 912 #endif 913 #endif 914 } 915 916 #ifdef ENABLE_CLASSIC 917 918 static const uint16_t packet_type_sizes[] = { 919 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 920 HCI_ACL_DH1_SIZE, 0, 0, 0, 921 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 922 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 923 }; 924 static const uint8_t packet_type_feature_requirement_bit[] = { 925 0, // 3 slot packets 926 1, // 5 slot packets 927 25, // EDR 2 mpbs 928 26, // EDR 3 mbps 929 39, // 3 slot EDR packts 930 40, // 5 slot EDR packet 931 }; 932 static const uint16_t packet_type_feature_packet_mask[] = { 933 0x0f00, // 3 slot packets 934 0xf000, // 5 slot packets 935 0x1102, // EDR 2 mpbs 936 0x2204, // EDR 3 mbps 937 0x0300, // 3 slot EDR packts 938 0x3000, // 5 slot EDR packet 939 }; 940 941 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 942 // enable packet types based on size 943 uint16_t packet_types = 0; 944 unsigned int i; 945 for (i=0;i<16;i++){ 946 if (packet_type_sizes[i] == 0) continue; 947 if (packet_type_sizes[i] <= buffer_size){ 948 packet_types |= 1 << i; 949 } 950 } 951 // disable packet types due to missing local supported features 952 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 953 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 954 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 955 if (feature_set) continue; 956 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 957 packet_types &= ~packet_type_feature_packet_mask[i]; 958 } 959 // flip bits for "may not be used" 960 packet_types ^= 0x3306; 961 return packet_types; 962 } 963 964 uint16_t hci_usable_acl_packet_types(void){ 965 return hci_stack->packet_types; 966 } 967 #endif 968 969 uint8_t* hci_get_outgoing_packet_buffer(void){ 970 // hci packet buffer is >= acl data packet length 971 return hci_stack->hci_packet_buffer; 972 } 973 974 uint16_t hci_max_acl_data_packet_length(void){ 975 return hci_stack->acl_data_packet_length; 976 } 977 978 #ifdef ENABLE_CLASSIC 979 int hci_extended_sco_link_supported(void){ 980 // No. 31, byte 3, bit 7 981 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 982 } 983 #endif 984 985 int hci_non_flushable_packet_boundary_flag_supported(void){ 986 // No. 54, byte 6, bit 6 987 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 988 } 989 990 static int gap_ssp_supported(void){ 991 // No. 51, byte 6, bit 3 992 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 993 } 994 995 static int hci_classic_supported(void){ 996 #ifdef ENABLE_CLASSIC 997 // No. 37, byte 4, bit 5, = No BR/EDR Support 998 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 999 #else 1000 return 0; 1001 #endif 1002 } 1003 1004 static int hci_le_supported(void){ 1005 #ifdef ENABLE_BLE 1006 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1007 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1008 #else 1009 return 0; 1010 #endif 1011 } 1012 1013 #ifdef ENABLE_BLE 1014 1015 /** 1016 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1017 */ 1018 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1019 *addr_type = hci_stack->le_own_addr_type; 1020 if (hci_stack->le_own_addr_type){ 1021 memcpy(addr, hci_stack->le_random_address, 6); 1022 } else { 1023 memcpy(addr, hci_stack->local_bd_addr, 6); 1024 } 1025 } 1026 1027 #ifdef ENABLE_LE_CENTRAL 1028 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1029 1030 int offset = 3; 1031 int num_reports = packet[offset]; 1032 offset += 1; 1033 1034 int i; 1035 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1036 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1037 for (i=0; i<num_reports && offset < size;i++){ 1038 uint8_t data_length = btstack_min( packet[offset + 8], LE_ADVERTISING_DATA_SIZE); 1039 uint8_t event_size = 10 + data_length; 1040 int pos = 0; 1041 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1042 event[pos++] = event_size; 1043 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 1044 offset += 8; 1045 pos += 8; 1046 event[pos++] = packet[offset + 1 + data_length]; // rssi 1047 event[pos++] = packet[offset++]; //data_length; 1048 memcpy(&event[pos], &packet[offset], data_length); 1049 pos += data_length; 1050 offset += data_length + 1; // rssi 1051 hci_emit_event(event, pos, 1); 1052 } 1053 } 1054 #endif 1055 #endif 1056 1057 #ifdef ENABLE_BLE 1058 #ifdef ENABLE_LE_PERIPHERAL 1059 static void hci_reenable_advertisements_if_needed(void){ 1060 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1061 // get number of active le slave connections 1062 int num_slave_connections = 0; 1063 btstack_linked_list_iterator_t it; 1064 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1065 while (btstack_linked_list_iterator_has_next(&it)){ 1066 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1067 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1068 if (con->state != OPEN) continue; 1069 if (con->role != HCI_ROLE_SLAVE) continue; 1070 if (!hci_is_le_connection(con)) continue; 1071 num_slave_connections++; 1072 } 1073 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1074 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1075 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1076 } 1077 } 1078 } 1079 #endif 1080 #endif 1081 1082 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1083 1084 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1085 if (!hci_stack->config) return 0; 1086 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1087 // Limit baud rate for Broadcom chipsets to 3 mbps 1088 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 1089 baud_rate = 3000000; 1090 } 1091 return baud_rate; 1092 } 1093 1094 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1095 UNUSED(ds); 1096 1097 switch (hci_stack->substate){ 1098 case HCI_INIT_W4_SEND_RESET: 1099 log_info("Resend HCI Reset"); 1100 hci_stack->substate = HCI_INIT_SEND_RESET; 1101 hci_stack->num_cmd_packets = 1; 1102 hci_run(); 1103 break; 1104 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1105 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1106 if (hci_stack->hci_transport->reset_link){ 1107 hci_stack->hci_transport->reset_link(); 1108 } 1109 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1110 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1111 log_info("Resend HCI Reset - CSR Warm Boot"); 1112 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1113 hci_stack->num_cmd_packets = 1; 1114 hci_run(); 1115 break; 1116 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1117 if (hci_stack->hci_transport->set_baudrate){ 1118 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1119 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1120 hci_stack->hci_transport->set_baudrate(baud_rate); 1121 } 1122 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1123 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1124 if (hci_stack->hci_transport->reset_link){ 1125 log_info("Link Reset"); 1126 hci_stack->hci_transport->reset_link(); 1127 } 1128 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1129 hci_run(); 1130 } 1131 break; 1132 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1133 // otherwise continue 1134 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1135 hci_send_cmd(&hci_read_local_supported_commands); 1136 break; 1137 default: 1138 break; 1139 } 1140 } 1141 #endif 1142 1143 static void hci_initializing_next_state(void){ 1144 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1145 } 1146 1147 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_PERIPHERAL) 1148 static void hci_replace_bd_addr_placeholder(uint8_t * data, uint16_t size){ 1149 const int bd_addr_string_len = 17; 1150 int i = 0; 1151 while (i < size - bd_addr_string_len){ 1152 if (memcmp(&data[i], "00:00:00:00:00:00", bd_addr_string_len)) { 1153 i++; 1154 continue; 1155 } 1156 // set real address 1157 memcpy(&data[i], bd_addr_to_str(hci_stack->local_bd_addr), bd_addr_string_len); 1158 i += bd_addr_string_len; 1159 } 1160 } 1161 #endif 1162 1163 // assumption: hci_can_send_command_packet_now() == true 1164 static void hci_initializing_run(void){ 1165 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1166 switch (hci_stack->substate){ 1167 case HCI_INIT_SEND_RESET: 1168 hci_state_reset(); 1169 1170 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1171 // prepare reset if command complete not received in 100ms 1172 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1173 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1174 btstack_run_loop_add_timer(&hci_stack->timeout); 1175 #endif 1176 // send command 1177 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1178 hci_send_cmd(&hci_reset); 1179 break; 1180 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1181 hci_send_cmd(&hci_read_local_version_information); 1182 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1183 break; 1184 case HCI_INIT_SEND_READ_LOCAL_NAME: 1185 hci_send_cmd(&hci_read_local_name); 1186 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1187 break; 1188 1189 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1190 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1191 hci_state_reset(); 1192 // prepare reset if command complete not received in 100ms 1193 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1194 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1195 btstack_run_loop_add_timer(&hci_stack->timeout); 1196 // send command 1197 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1198 hci_send_cmd(&hci_reset); 1199 break; 1200 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1201 hci_state_reset(); 1202 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1203 hci_send_cmd(&hci_reset); 1204 break; 1205 case HCI_INIT_SEND_BAUD_CHANGE: { 1206 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1207 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1208 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1209 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1210 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1211 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1212 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1213 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1214 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1215 btstack_run_loop_add_timer(&hci_stack->timeout); 1216 } 1217 break; 1218 } 1219 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1220 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1221 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1222 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1223 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1224 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1225 break; 1226 } 1227 case HCI_INIT_CUSTOM_INIT: 1228 // Custom initialization 1229 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1230 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1231 if (valid_cmd){ 1232 int size = 3 + hci_stack->hci_packet_buffer[2]; 1233 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1234 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1235 switch (valid_cmd) { 1236 case BTSTACK_CHIPSET_VALID_COMMAND: 1237 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1238 break; 1239 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1240 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1241 log_info("CSR Warm Boot"); 1242 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1243 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1244 btstack_run_loop_add_timer(&hci_stack->timeout); 1245 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1246 && hci_stack->config 1247 && hci_stack->chipset 1248 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1249 && hci_stack->hci_transport->set_baudrate 1250 && hci_transport_uart_get_main_baud_rate()){ 1251 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1252 } else { 1253 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1254 } 1255 break; 1256 default: 1257 // should not get here 1258 break; 1259 } 1260 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1261 break; 1262 } 1263 log_info("Init script done"); 1264 1265 // Init script download on Broadcom chipsets causes: 1266 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION 1267 || hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA){ 1268 1269 // - baud rate to reset, restore UART baud rate if needed 1270 int need_baud_change = hci_stack->config 1271 && hci_stack->chipset 1272 && hci_stack->chipset->set_baudrate_command 1273 && hci_stack->hci_transport->set_baudrate 1274 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1275 if (need_baud_change) { 1276 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1277 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1278 hci_stack->hci_transport->set_baudrate(baud_rate); 1279 } 1280 1281 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1282 // -> Work around: wait a few milliseconds here. 1283 log_info("BCM delay after init script"); 1284 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1285 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1286 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1287 btstack_run_loop_add_timer(&hci_stack->timeout); 1288 break; 1289 } 1290 } 1291 // otherwise continue 1292 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1293 hci_send_cmd(&hci_read_local_supported_commands); 1294 break; 1295 case HCI_INIT_SET_BD_ADDR: 1296 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1297 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1298 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1299 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1300 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1301 break; 1302 #endif 1303 1304 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1305 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1306 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1307 hci_send_cmd(&hci_read_local_supported_commands); 1308 break; 1309 case HCI_INIT_READ_BD_ADDR: 1310 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1311 hci_send_cmd(&hci_read_bd_addr); 1312 break; 1313 case HCI_INIT_READ_BUFFER_SIZE: 1314 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1315 hci_send_cmd(&hci_read_buffer_size); 1316 break; 1317 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1318 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1319 hci_send_cmd(&hci_read_local_supported_features); 1320 break; 1321 1322 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1323 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1324 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1325 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1326 break; 1327 case HCI_INIT_HOST_BUFFER_SIZE: 1328 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1329 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1330 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1331 break; 1332 #endif 1333 1334 case HCI_INIT_SET_EVENT_MASK: 1335 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1336 if (hci_le_supported()){ 1337 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1338 } else { 1339 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1340 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1341 } 1342 break; 1343 1344 #ifdef ENABLE_CLASSIC 1345 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1346 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1347 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1348 break; 1349 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1350 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1351 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1352 break; 1353 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1354 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1355 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1356 break; 1357 case HCI_INIT_WRITE_LOCAL_NAME: { 1358 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1359 hci_reserve_packet_buffer(); 1360 uint8_t * packet = hci_stack->hci_packet_buffer; 1361 // construct HCI Command and send 1362 uint16_t opcode = hci_write_local_name.opcode; 1363 hci_stack->last_cmd_opcode = opcode; 1364 packet[0] = opcode & 0xff; 1365 packet[1] = opcode >> 8; 1366 packet[2] = DEVICE_NAME_LEN; 1367 memset(&packet[3], 0, DEVICE_NAME_LEN); 1368 memcpy(&packet[3], hci_stack->local_name, strlen(hci_stack->local_name)); 1369 // expand '00:00:00:00:00:00' in name with bd_addr 1370 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1371 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1372 break; 1373 } 1374 case HCI_INIT_WRITE_EIR_DATA: { 1375 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1376 hci_reserve_packet_buffer(); 1377 uint8_t * packet = hci_stack->hci_packet_buffer; 1378 // construct HCI Command and send 1379 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1380 hci_stack->last_cmd_opcode = opcode; 1381 packet[0] = opcode & 0xff; 1382 packet[1] = opcode >> 8; 1383 packet[2] = 1 + 240; 1384 packet[3] = 0; // FEC not required 1385 if (hci_stack->eir_data){ 1386 memcpy(&packet[4], hci_stack->eir_data, 240); 1387 } else { 1388 memset(&packet[4], 0, 240); 1389 int name_len = strlen(hci_stack->local_name); 1390 packet[4] = name_len + 1; 1391 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1392 memcpy(&packet[6], hci_stack->local_name, name_len); 1393 } 1394 // expand '00:00:00:00:00:00' in name with bd_addr 1395 hci_replace_bd_addr_placeholder(&packet[4], 240); 1396 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1397 break; 1398 } 1399 case HCI_INIT_WRITE_INQUIRY_MODE: 1400 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1401 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1402 break; 1403 case HCI_INIT_WRITE_SCAN_ENABLE: 1404 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1405 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1406 break; 1407 // only sent if ENABLE_SCO_OVER_HCI is defined 1408 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1409 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1410 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1411 break; 1412 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1413 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1414 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1415 break; 1416 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1417 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1418 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1419 log_info("BCM: Route SCO data via HCI transport"); 1420 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1421 break; 1422 1423 #endif 1424 #ifdef ENABLE_BLE 1425 // LE INIT 1426 case HCI_INIT_LE_READ_BUFFER_SIZE: 1427 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1428 hci_send_cmd(&hci_le_read_buffer_size); 1429 break; 1430 case HCI_INIT_LE_SET_EVENT_MASK: 1431 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1432 hci_send_cmd(&hci_le_set_event_mask, 0x1FF, 0x0); 1433 break; 1434 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1435 // LE Supported Host = 1, Simultaneous Host = 0 1436 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1437 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1438 break; 1439 #endif 1440 1441 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1442 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1443 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1444 hci_send_cmd(&hci_le_read_maximum_data_length); 1445 break; 1446 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1447 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1448 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1449 break; 1450 #endif 1451 1452 #ifdef ENABLE_LE_CENTRAL 1453 case HCI_INIT_READ_WHITE_LIST_SIZE: 1454 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1455 hci_send_cmd(&hci_le_read_white_list_size); 1456 break; 1457 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1458 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1459 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1460 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1461 break; 1462 #endif 1463 default: 1464 return; 1465 } 1466 } 1467 1468 static void hci_init_done(void){ 1469 // done. tell the app 1470 log_info("hci_init_done -> HCI_STATE_WORKING"); 1471 hci_stack->state = HCI_STATE_WORKING; 1472 hci_emit_state(); 1473 hci_run(); 1474 } 1475 1476 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1477 1478 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1479 1480 uint8_t command_completed = 0; 1481 1482 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1483 uint16_t opcode = little_endian_read_16(packet,3); 1484 if (opcode == hci_stack->last_cmd_opcode){ 1485 command_completed = 1; 1486 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1487 } else { 1488 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1489 } 1490 } 1491 1492 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1493 uint8_t status = packet[2]; 1494 uint16_t opcode = little_endian_read_16(packet,4); 1495 if (opcode == hci_stack->last_cmd_opcode){ 1496 if (status){ 1497 command_completed = 1; 1498 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1499 } else { 1500 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1501 } 1502 } else { 1503 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1504 } 1505 } 1506 1507 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1508 1509 // Vendor == CSR 1510 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1511 // TODO: track actual command 1512 command_completed = 1; 1513 } 1514 1515 // Vendor == Toshiba 1516 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1517 // TODO: track actual command 1518 command_completed = 1; 1519 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1520 hci_stack->num_cmd_packets = 1; 1521 } 1522 1523 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1524 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1525 // 1526 // HCI Reset 1527 // Timeout 100 ms 1528 // HCI Reset 1529 // Command Complete Reset 1530 // HCI Read Local Version Information 1531 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1532 // hang... 1533 // 1534 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1535 if (!command_completed 1536 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1537 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1538 1539 uint16_t opcode = little_endian_read_16(packet,3); 1540 if (opcode == hci_reset.opcode){ 1541 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1542 return; 1543 } 1544 } 1545 1546 // CSR & H5 1547 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1548 if (!command_completed 1549 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1550 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1551 1552 uint16_t opcode = little_endian_read_16(packet,3); 1553 if (opcode == hci_reset.opcode){ 1554 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1555 return; 1556 } 1557 } 1558 1559 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1560 // fix: Correct substate and behave as command below 1561 if (command_completed){ 1562 switch (hci_stack->substate){ 1563 case HCI_INIT_SEND_RESET: 1564 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1565 break; 1566 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1567 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1568 break; 1569 default: 1570 break; 1571 } 1572 } 1573 1574 #endif 1575 1576 if (!command_completed) return; 1577 1578 int need_baud_change = 0; 1579 int need_addr_change = 0; 1580 1581 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1582 need_baud_change = hci_stack->config 1583 && hci_stack->chipset 1584 && hci_stack->chipset->set_baudrate_command 1585 && hci_stack->hci_transport->set_baudrate 1586 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1587 1588 need_addr_change = hci_stack->custom_bd_addr_set 1589 && hci_stack->chipset 1590 && hci_stack->chipset->set_bd_addr_command; 1591 #endif 1592 1593 switch(hci_stack->substate){ 1594 1595 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1596 case HCI_INIT_SEND_RESET: 1597 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1598 // fix: just correct substate and behave as command below 1599 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1600 btstack_run_loop_remove_timer(&hci_stack->timeout); 1601 break; 1602 case HCI_INIT_W4_SEND_RESET: 1603 btstack_run_loop_remove_timer(&hci_stack->timeout); 1604 break; 1605 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1606 log_info("Received local name, need baud change %d", need_baud_change); 1607 if (need_baud_change){ 1608 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1609 return; 1610 } 1611 // skip baud change 1612 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1613 return; 1614 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1615 // for STLC2500D, baud rate change already happened. 1616 // for others, baud rate gets changed now 1617 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1618 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1619 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1620 hci_stack->hci_transport->set_baudrate(baud_rate); 1621 } 1622 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1623 return; 1624 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1625 btstack_run_loop_remove_timer(&hci_stack->timeout); 1626 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1627 return; 1628 case HCI_INIT_W4_CUSTOM_INIT: 1629 // repeat custom init 1630 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1631 return; 1632 #else 1633 case HCI_INIT_W4_SEND_RESET: 1634 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1635 return ; 1636 #endif 1637 1638 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1639 if (need_baud_change && 1640 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1641 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1642 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1643 return; 1644 } 1645 if (need_addr_change){ 1646 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1647 return; 1648 } 1649 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1650 return; 1651 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1652 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1653 if (need_baud_change){ 1654 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1655 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1656 hci_stack->hci_transport->set_baudrate(baud_rate); 1657 } 1658 if (need_addr_change){ 1659 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1660 return; 1661 } 1662 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1663 return; 1664 case HCI_INIT_W4_SET_BD_ADDR: 1665 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1666 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1667 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1668 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1669 return; 1670 } 1671 // skipping st warm boot 1672 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1673 return; 1674 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1675 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1676 return; 1677 #endif 1678 case HCI_INIT_W4_READ_BD_ADDR: 1679 // only read buffer size if supported 1680 if (hci_stack->local_supported_commands[0] & 0x01) { 1681 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1682 return; 1683 } 1684 // skipping read buffer size 1685 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1686 return; 1687 case HCI_INIT_W4_SET_EVENT_MASK: 1688 // skip Classic init commands for LE only chipsets 1689 if (!hci_classic_supported()){ 1690 #ifdef ENABLE_BLE 1691 if (hci_le_supported()){ 1692 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1693 return; 1694 } 1695 #endif 1696 log_error("Neither BR/EDR nor LE supported"); 1697 hci_init_done(); 1698 return; 1699 } 1700 if (!gap_ssp_supported()){ 1701 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1702 return; 1703 } 1704 break; 1705 #ifdef ENABLE_BLE 1706 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1707 // skip write le host if not supported (e.g. on LE only EM9301) 1708 if (hci_stack->local_supported_commands[0] & 0x02) break; 1709 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1710 return; 1711 1712 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1713 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1714 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1715 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1716 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1717 return; 1718 } 1719 // explicit fall through to reduce repetitions 1720 1721 #ifdef ENABLE_LE_CENTRAL 1722 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1723 #else 1724 hci_init_done(); 1725 #endif 1726 return; 1727 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1728 1729 #endif /* ENABLE_BLE */ 1730 1731 #ifdef ENABLE_SCO_OVER_HCI 1732 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1733 // skip write synchronous flow control if not supported 1734 if (hci_stack->local_supported_commands[0] & 0x04) break; 1735 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1736 // explicit fall through to reduce repetitions 1737 1738 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1739 // skip write default erroneous data reporting if not supported 1740 if (hci_stack->local_supported_commands[0] & 0x08) break; 1741 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1742 // explicit fall through to reduce repetitions 1743 1744 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1745 // skip bcm set sco pcm config on non-Broadcom chipsets 1746 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1747 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1748 // explicit fall through to reduce repetitions 1749 1750 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1751 if (!hci_le_supported()){ 1752 // SKIP LE init for Classic only configuration 1753 hci_init_done(); 1754 return; 1755 } 1756 break; 1757 1758 #else /* !ENABLE_SCO_OVER_HCI */ 1759 1760 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1761 #ifdef ENABLE_BLE 1762 if (hci_le_supported()){ 1763 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1764 return; 1765 } 1766 #endif 1767 // SKIP LE init for Classic only configuration 1768 hci_init_done(); 1769 return; 1770 #endif /* ENABLE_SCO_OVER_HCI */ 1771 1772 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1773 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1774 // Response to command before init done state -> init done 1775 case (HCI_INIT_DONE-1): 1776 hci_init_done(); 1777 return; 1778 #endif 1779 1780 default: 1781 break; 1782 } 1783 hci_initializing_next_state(); 1784 } 1785 1786 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1787 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1788 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1789 bd_addr_t bd_address; 1790 memcpy(&bd_address, conn->address, 6); 1791 1792 // connection failed, remove entry 1793 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1794 btstack_memory_hci_connection_free( conn ); 1795 1796 // notify client if dedicated bonding 1797 if (notify_dedicated_bonding_failed){ 1798 log_info("hci notify_dedicated_bonding_failed"); 1799 hci_emit_dedicated_bonding_result(bd_address, status); 1800 } 1801 1802 // if authentication error, also delete link key 1803 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1804 gap_drop_link_key_for_bd_addr(bd_address); 1805 } 1806 } 1807 1808 static void event_handler(uint8_t *packet, int size){ 1809 1810 uint16_t event_length = packet[1]; 1811 1812 // assert packet is complete 1813 if (size != event_length + 2){ 1814 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1815 return; 1816 } 1817 1818 bd_addr_t addr; 1819 bd_addr_type_t addr_type; 1820 hci_con_handle_t handle; 1821 hci_connection_t * conn; 1822 int i; 1823 #ifdef ENABLE_CLASSIC 1824 uint8_t link_type; 1825 #endif 1826 1827 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1828 1829 switch (hci_event_packet_get_type(packet)) { 1830 1831 case HCI_EVENT_COMMAND_COMPLETE: 1832 // get num cmd packets - limit to 1 to reduce complexity 1833 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1834 1835 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1836 if (packet[5]) break; 1837 // terminate, name 248 chars 1838 packet[6+248] = 0; 1839 log_info("local name: %s", &packet[6]); 1840 } 1841 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1842 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1843 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1844 uint16_t acl_len = little_endian_read_16(packet, 6); 1845 uint16_t sco_len = packet[8]; 1846 1847 // determine usable ACL/SCO payload size 1848 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1849 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1850 1851 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1852 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1853 1854 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1855 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1856 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1857 } 1858 } 1859 #ifdef ENABLE_BLE 1860 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1861 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1862 hci_stack->le_acl_packets_total_num = packet[8]; 1863 // determine usable ACL payload size 1864 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1865 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1866 } 1867 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1868 } 1869 #endif 1870 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1871 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1872 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1873 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1874 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); 1875 } 1876 #endif 1877 #ifdef ENABLE_LE_CENTRAL 1878 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1879 hci_stack->le_whitelist_capacity = packet[6]; 1880 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1881 } 1882 #endif 1883 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1884 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1885 hci_stack->local_bd_addr); 1886 log_info("Local Address, Status: 0x%02x: Addr: %s", 1887 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1888 #ifdef ENABLE_CLASSIC 1889 if (hci_stack->link_key_db){ 1890 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1891 } 1892 #endif 1893 } 1894 #ifdef ENABLE_CLASSIC 1895 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1896 hci_emit_discoverable_enabled(hci_stack->discoverable); 1897 } 1898 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1899 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1900 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1901 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1902 hci_emit_event(event, sizeof(event), 1); 1903 } 1904 } 1905 #endif 1906 1907 // Note: HCI init checks 1908 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1909 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1910 1911 #ifdef ENABLE_CLASSIC 1912 // determine usable ACL packet types based on host buffer size and supported features 1913 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1914 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1915 #endif 1916 // Classic/LE 1917 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1918 } 1919 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1920 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1921 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1922 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1923 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1924 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1925 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1926 } 1927 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1928 hci_stack->local_supported_commands[0] = 1929 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1930 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1931 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1932 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 1933 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 1934 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2; // bit 5 = Octet 35, bit 3 1935 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1936 } 1937 #ifdef ENABLE_CLASSIC 1938 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1939 if (packet[5] == 0){ 1940 hci_stack->synchronous_flow_control_enabled = 1; 1941 } 1942 } 1943 #endif 1944 break; 1945 1946 case HCI_EVENT_COMMAND_STATUS: 1947 // get num cmd packets - limit to 1 to reduce complexity 1948 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1949 1950 // check command status to detected failed outgoing connections 1951 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection) || 1952 HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)) { 1953 1954 uint8_t status = hci_event_command_status_get_status(packet); 1955 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 1956 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); 1957 1958 // reset outgoing address info 1959 memset(hci_stack->outgoing_addr, 0, 6); 1960 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 1961 1962 // error => outgoing connection failed 1963 if ((conn != NULL) && (status != 0)){ 1964 hci_handle_connection_failed(conn, status); 1965 } 1966 } 1967 break; 1968 1969 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1970 int offset = 3; 1971 for (i=0; i<packet[2];i++){ 1972 handle = little_endian_read_16(packet, offset) & 0x0fff; 1973 offset += 2; 1974 uint16_t num_packets = little_endian_read_16(packet, offset); 1975 offset += 2; 1976 1977 conn = hci_connection_for_handle(handle); 1978 if (!conn){ 1979 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1980 continue; 1981 } 1982 1983 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1984 #ifdef ENABLE_CLASSIC 1985 if (conn->num_sco_packets_sent >= num_packets){ 1986 conn->num_sco_packets_sent -= num_packets; 1987 } else { 1988 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1989 conn->num_sco_packets_sent = 0; 1990 } 1991 hci_notify_if_sco_can_send_now(); 1992 #endif 1993 } else { 1994 if (conn->num_acl_packets_sent >= num_packets){ 1995 conn->num_acl_packets_sent -= num_packets; 1996 } else { 1997 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1998 conn->num_acl_packets_sent = 0; 1999 } 2000 } 2001 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 2002 } 2003 break; 2004 } 2005 2006 #ifdef ENABLE_CLASSIC 2007 case HCI_EVENT_INQUIRY_COMPLETE: 2008 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2009 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2010 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2011 hci_emit_event(event, sizeof(event), 1); 2012 } 2013 break; 2014 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2015 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2016 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2017 } 2018 break; 2019 case HCI_EVENT_CONNECTION_REQUEST: 2020 reverse_bd_addr(&packet[2], addr); 2021 // TODO: eval COD 8-10 2022 link_type = packet[11]; 2023 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2024 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 2025 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2026 if (!conn) { 2027 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2028 } 2029 if (!conn) { 2030 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2031 hci_stack->decline_reason = 0x0d; 2032 bd_addr_copy(hci_stack->decline_addr, addr); 2033 break; 2034 } 2035 conn->role = HCI_ROLE_SLAVE; 2036 conn->state = RECEIVED_CONNECTION_REQUEST; 2037 // store info about eSCO 2038 if (link_type == 0x02){ 2039 conn->remote_supported_feature_eSCO = 1; 2040 } 2041 hci_run(); 2042 break; 2043 2044 case HCI_EVENT_CONNECTION_COMPLETE: 2045 // Connection management 2046 reverse_bd_addr(&packet[5], addr); 2047 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2048 addr_type = BD_ADDR_TYPE_CLASSIC; 2049 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2050 if (conn) { 2051 if (!packet[2]){ 2052 conn->state = OPEN; 2053 conn->con_handle = little_endian_read_16(packet, 3); 2054 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2055 2056 // restart timer 2057 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2058 btstack_run_loop_add_timer(&conn->timeout); 2059 2060 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2061 2062 hci_emit_nr_connections_changed(); 2063 } else { 2064 // connection failed 2065 hci_handle_connection_failed(conn, packet[2]); 2066 } 2067 } 2068 break; 2069 2070 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2071 reverse_bd_addr(&packet[5], addr); 2072 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2073 if (packet[2]){ 2074 // connection failed 2075 break; 2076 } 2077 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2078 if (!conn) { 2079 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2080 } 2081 if (!conn) { 2082 break; 2083 } 2084 conn->state = OPEN; 2085 conn->con_handle = little_endian_read_16(packet, 3); 2086 2087 #ifdef ENABLE_SCO_OVER_HCI 2088 // update SCO 2089 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2090 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2091 } 2092 #endif 2093 break; 2094 2095 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2096 handle = little_endian_read_16(packet, 3); 2097 conn = hci_connection_for_handle(handle); 2098 if (!conn) break; 2099 if (!packet[2]){ 2100 uint8_t * features = &packet[5]; 2101 if (features[6] & (1 << 3)){ 2102 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2103 } 2104 if (features[3] & (1<<7)){ 2105 conn->remote_supported_feature_eSCO = 1; 2106 } 2107 } 2108 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2109 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2110 if (conn->bonding_flags & BONDING_DEDICATED){ 2111 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2112 } 2113 break; 2114 2115 case HCI_EVENT_LINK_KEY_REQUEST: 2116 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2117 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2118 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2119 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2120 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2121 hci_run(); 2122 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2123 return; 2124 2125 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2126 reverse_bd_addr(&packet[2], addr); 2127 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2128 if (!conn) break; 2129 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2130 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2131 // Change Connection Encryption keeps link key type 2132 if (link_key_type != CHANGED_COMBINATION_KEY){ 2133 conn->link_key_type = link_key_type; 2134 } 2135 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2136 // still forward event to allow dismiss of pairing dialog 2137 break; 2138 } 2139 2140 case HCI_EVENT_PIN_CODE_REQUEST: 2141 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2142 // non-bondable mode: pin code negative reply will be sent 2143 if (!hci_stack->bondable){ 2144 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2145 hci_run(); 2146 return; 2147 } 2148 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2149 if (!hci_stack->link_key_db) break; 2150 hci_event_pin_code_request_get_bd_addr(packet, addr); 2151 hci_stack->link_key_db->delete_link_key(addr); 2152 break; 2153 2154 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2155 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2156 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2157 break; 2158 2159 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2160 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2161 if (!hci_stack->ssp_auto_accept) break; 2162 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2163 break; 2164 2165 case HCI_EVENT_USER_PASSKEY_REQUEST: 2166 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2167 if (!hci_stack->ssp_auto_accept) break; 2168 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2169 break; 2170 #endif 2171 2172 case HCI_EVENT_ENCRYPTION_CHANGE: 2173 handle = little_endian_read_16(packet, 3); 2174 conn = hci_connection_for_handle(handle); 2175 if (!conn) break; 2176 if (packet[2] == 0) { 2177 if (packet[5]){ 2178 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2179 } else { 2180 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2181 } 2182 } 2183 #ifdef ENABLE_CLASSIC 2184 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2185 #endif 2186 break; 2187 2188 #ifdef ENABLE_CLASSIC 2189 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2190 handle = little_endian_read_16(packet, 3); 2191 conn = hci_connection_for_handle(handle); 2192 if (!conn) break; 2193 2194 // dedicated bonding: send result and disconnect 2195 if (conn->bonding_flags & BONDING_DEDICATED){ 2196 conn->bonding_flags &= ~BONDING_DEDICATED; 2197 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2198 conn->bonding_status = packet[2]; 2199 break; 2200 } 2201 2202 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2203 // link key sufficient for requested security 2204 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2205 break; 2206 } 2207 // not enough 2208 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2209 break; 2210 #endif 2211 2212 // HCI_EVENT_DISCONNECTION_COMPLETE 2213 // has been split, to first notify stack before shutting connection down 2214 // see end of function, too. 2215 case HCI_EVENT_DISCONNECTION_COMPLETE: 2216 if (packet[2]) break; // status != 0 2217 handle = little_endian_read_16(packet, 3); 2218 // drop outgoing ACL fragments if it is for closed connection 2219 if (hci_stack->acl_fragmentation_total_size > 0) { 2220 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2221 log_info("hci: drop fragmented ACL data for closed connection"); 2222 hci_stack->acl_fragmentation_total_size = 0; 2223 hci_stack->acl_fragmentation_pos = 0; 2224 } 2225 } 2226 2227 // re-enable advertisements for le connections if active 2228 conn = hci_connection_for_handle(handle); 2229 if (!conn) break; 2230 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2231 #ifdef ENABLE_BLE 2232 #ifdef ENABLE_LE_PERIPHERAL 2233 if (hci_is_le_connection(conn)){ 2234 hci_reenable_advertisements_if_needed(); 2235 } 2236 #endif 2237 #endif 2238 break; 2239 2240 case HCI_EVENT_HARDWARE_ERROR: 2241 log_error("Hardware Error: 0x%02x", packet[2]); 2242 if (hci_stack->hardware_error_callback){ 2243 (*hci_stack->hardware_error_callback)(packet[2]); 2244 } else { 2245 // if no special requests, just reboot stack 2246 hci_power_control_off(); 2247 hci_power_control_on(); 2248 } 2249 break; 2250 2251 #ifdef ENABLE_CLASSIC 2252 case HCI_EVENT_ROLE_CHANGE: 2253 if (packet[2]) break; // status != 0 2254 reverse_bd_addr(&packet[3], addr); 2255 addr_type = BD_ADDR_TYPE_CLASSIC; 2256 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2257 if (!conn) break; 2258 conn->role = packet[9]; 2259 break; 2260 #endif 2261 2262 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2263 // release packet buffer only for asynchronous transport and if there are not further fragements 2264 if (hci_transport_synchronous()) { 2265 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2266 return; // instead of break: to avoid re-entering hci_run() 2267 } 2268 if (hci_stack->acl_fragmentation_total_size) break; 2269 hci_release_packet_buffer(); 2270 2271 // L2CAP receives this event via the hci_emit_event below 2272 2273 #ifdef ENABLE_CLASSIC 2274 // For SCO, we do the can_send_now_check here 2275 hci_notify_if_sco_can_send_now(); 2276 #endif 2277 break; 2278 2279 #ifdef ENABLE_CLASSIC 2280 case HCI_EVENT_SCO_CAN_SEND_NOW: 2281 // For SCO, we do the can_send_now_check here 2282 hci_notify_if_sco_can_send_now(); 2283 return; 2284 2285 // explode inquriy results for easier consumption 2286 case HCI_EVENT_INQUIRY_RESULT: 2287 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2288 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2289 gap_inquiry_explode(packet); 2290 break; 2291 #endif 2292 2293 #ifdef ENABLE_BLE 2294 case HCI_EVENT_LE_META: 2295 switch (packet[2]){ 2296 #ifdef ENABLE_LE_CENTRAL 2297 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2298 // log_info("advertising report received"); 2299 if (!hci_stack->le_scanning_enabled) break; 2300 le_handle_advertisement_report(packet, size); 2301 break; 2302 #endif 2303 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2304 // Connection management 2305 reverse_bd_addr(&packet[8], addr); 2306 addr_type = (bd_addr_type_t)packet[7]; 2307 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2308 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2309 2310 #ifdef ENABLE_LE_CENTRAL 2311 // if auto-connect, remove from whitelist in both roles 2312 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2313 hci_remove_from_whitelist(addr_type, addr); 2314 } 2315 // handle error: error is reported only to the initiator -> outgoing connection 2316 if (packet[3]){ 2317 2318 // handle cancelled outgoing connection 2319 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2320 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2321 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2322 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2323 conn = gap_get_outgoing_connection(); 2324 } 2325 2326 // outgoing connection establishment is done 2327 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2328 // remove entry 2329 if (conn){ 2330 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2331 btstack_memory_hci_connection_free( conn ); 2332 } 2333 break; 2334 } 2335 #endif 2336 // on success, both hosts receive connection complete event 2337 if (packet[6] == HCI_ROLE_MASTER){ 2338 #ifdef ENABLE_LE_CENTRAL 2339 // if we're master, it was an outgoing connection and we're done with it 2340 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2341 #endif 2342 } else { 2343 #ifdef ENABLE_LE_PERIPHERAL 2344 // if we're slave, it was an incoming connection, advertisements have stopped 2345 hci_stack->le_advertisements_active = 0; 2346 #endif 2347 } 2348 // LE connections are auto-accepted, so just create a connection if there isn't one already 2349 if (!conn){ 2350 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2351 } 2352 // no memory, sorry. 2353 if (!conn){ 2354 break; 2355 } 2356 2357 conn->state = OPEN; 2358 conn->role = packet[6]; 2359 conn->con_handle = little_endian_read_16(packet, 4); 2360 2361 #ifdef ENABLE_LE_PERIPHERAL 2362 if (packet[6] == HCI_ROLE_SLAVE){ 2363 hci_reenable_advertisements_if_needed(); 2364 } 2365 #endif 2366 2367 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2368 2369 // restart timer 2370 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2371 // btstack_run_loop_add_timer(&conn->timeout); 2372 2373 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2374 2375 hci_emit_nr_connections_changed(); 2376 break; 2377 2378 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2379 2380 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2381 // connection 2382 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2383 conn = hci_connection_for_handle(handle); 2384 if (conn) { 2385 // read arguments 2386 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2387 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2388 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2389 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2390 2391 // validate against current connection parameter range 2392 le_connection_parameter_range_t existing_range; 2393 gap_get_connection_parameter_range(&existing_range); 2394 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2395 if (update_parameter){ 2396 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2397 conn->le_conn_interval_min = le_conn_interval_min; 2398 conn->le_conn_interval_max = le_conn_interval_max; 2399 conn->le_conn_latency = le_conn_latency; 2400 conn->le_supervision_timeout = le_supervision_timeout; 2401 } else { 2402 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2403 } 2404 } 2405 break; 2406 default: 2407 break; 2408 } 2409 break; 2410 #endif 2411 case HCI_EVENT_VENDOR_SPECIFIC: 2412 // Vendor specific commands often create vendor specific event instead of num completed packets 2413 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2414 switch (hci_stack->manufacturer){ 2415 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2416 hci_stack->num_cmd_packets = 1; 2417 break; 2418 default: 2419 break; 2420 } 2421 break; 2422 default: 2423 break; 2424 } 2425 2426 // handle BT initialization 2427 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2428 hci_initializing_event_handler(packet, size); 2429 } 2430 2431 // help with BT sleep 2432 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2433 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2434 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2435 hci_initializing_next_state(); 2436 } 2437 2438 // notify upper stack 2439 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2440 2441 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2442 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2443 if (!packet[2]){ 2444 handle = little_endian_read_16(packet, 3); 2445 hci_connection_t * aConn = hci_connection_for_handle(handle); 2446 if (aConn) { 2447 uint8_t status = aConn->bonding_status; 2448 uint16_t flags = aConn->bonding_flags; 2449 bd_addr_t bd_address; 2450 memcpy(&bd_address, aConn->address, 6); 2451 hci_shutdown_connection(aConn); 2452 // connection struct is gone, don't access anymore 2453 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2454 hci_emit_dedicated_bonding_result(bd_address, status); 2455 } 2456 } 2457 } 2458 } 2459 2460 // execute main loop 2461 hci_run(); 2462 } 2463 2464 #ifdef ENABLE_CLASSIC 2465 static void sco_handler(uint8_t * packet, uint16_t size){ 2466 if (!hci_stack->sco_packet_handler) return; 2467 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2468 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2469 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2470 hci_connection_t *conn = hci_connection_for_handle(con_handle); 2471 if (conn){ 2472 conn->num_packets_completed++; 2473 hci_stack->host_completed_packets = 1; 2474 hci_run(); 2475 } 2476 #endif 2477 } 2478 #endif 2479 2480 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2481 hci_dump_packet(packet_type, 1, packet, size); 2482 switch (packet_type) { 2483 case HCI_EVENT_PACKET: 2484 event_handler(packet, size); 2485 break; 2486 case HCI_ACL_DATA_PACKET: 2487 acl_handler(packet, size); 2488 break; 2489 #ifdef ENABLE_CLASSIC 2490 case HCI_SCO_DATA_PACKET: 2491 sco_handler(packet, size); 2492 break; 2493 #endif 2494 default: 2495 break; 2496 } 2497 } 2498 2499 /** 2500 * @brief Add event packet handler. 2501 */ 2502 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2503 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2504 } 2505 2506 2507 /** Register HCI packet handlers */ 2508 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2509 hci_stack->acl_packet_handler = handler; 2510 } 2511 2512 #ifdef ENABLE_CLASSIC 2513 /** 2514 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2515 */ 2516 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2517 hci_stack->sco_packet_handler = handler; 2518 } 2519 #endif 2520 2521 static void hci_state_reset(void){ 2522 // no connections yet 2523 hci_stack->connections = NULL; 2524 2525 // keep discoverable/connectable as this has been requested by the client(s) 2526 // hci_stack->discoverable = 0; 2527 // hci_stack->connectable = 0; 2528 // hci_stack->bondable = 1; 2529 // hci_stack->own_addr_type = 0; 2530 2531 // buffer is free 2532 hci_stack->hci_packet_buffer_reserved = 0; 2533 2534 // no pending cmds 2535 hci_stack->decline_reason = 0; 2536 hci_stack->new_scan_enable_value = 0xff; 2537 2538 // LE 2539 #ifdef ENABLE_BLE 2540 memset(hci_stack->le_random_address, 0, 6); 2541 hci_stack->le_random_address_set = 0; 2542 #endif 2543 #ifdef ENABLE_LE_CENTRAL 2544 hci_stack->le_scanning_active = 0; 2545 hci_stack->le_scan_type = 0xff; 2546 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2547 hci_stack->le_whitelist = 0; 2548 hci_stack->le_whitelist_capacity = 0; 2549 #endif 2550 } 2551 2552 #ifdef ENABLE_CLASSIC 2553 /** 2554 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2555 */ 2556 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2557 // store and open remote device db 2558 hci_stack->link_key_db = link_key_db; 2559 if (hci_stack->link_key_db) { 2560 hci_stack->link_key_db->open(); 2561 } 2562 } 2563 #endif 2564 2565 void hci_init(const hci_transport_t *transport, const void *config){ 2566 2567 #ifdef HAVE_MALLOC 2568 if (!hci_stack) { 2569 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2570 } 2571 #else 2572 hci_stack = &hci_stack_static; 2573 #endif 2574 memset(hci_stack, 0, sizeof(hci_stack_t)); 2575 2576 // reference to use transport layer implementation 2577 hci_stack->hci_transport = transport; 2578 2579 // reference to used config 2580 hci_stack->config = config; 2581 2582 // setup pointer for outgoing packet buffer 2583 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2584 2585 // max acl payload size defined in config.h 2586 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2587 2588 // register packet handlers with transport 2589 transport->register_packet_handler(&packet_handler); 2590 2591 hci_stack->state = HCI_STATE_OFF; 2592 2593 // class of device 2594 hci_stack->class_of_device = 0x007a020c; // Smartphone 2595 2596 // bondable by default 2597 hci_stack->bondable = 1; 2598 2599 #ifdef ENABLE_CLASSIC 2600 // classic name 2601 hci_stack->local_name = default_classic_name; 2602 2603 // Master slave policy 2604 hci_stack->master_slave_policy = 1; 2605 #endif 2606 2607 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2608 hci_stack->ssp_enable = 1; 2609 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2610 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2611 hci_stack->ssp_auto_accept = 1; 2612 2613 // voice setting - signed 16 bit pcm data with CVSD over the air 2614 hci_stack->sco_voice_setting = 0x60; 2615 2616 #ifdef ENABLE_LE_CENTRAL 2617 // connection parameter to use for outgoing connections 2618 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2619 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2620 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2621 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2622 hci_stack->le_connection_latency = 4; // 4 2623 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2624 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2625 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2626 #endif 2627 2628 #ifdef ENABLE_LE_PERIPHERAL 2629 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2630 #endif 2631 2632 // connection parameter range used to answer connection parameter update requests in l2cap 2633 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2634 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2635 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2636 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2637 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2638 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2639 2640 hci_state_reset(); 2641 } 2642 2643 /** 2644 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2645 */ 2646 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2647 hci_stack->chipset = chipset_driver; 2648 2649 // reset chipset driver - init is also called on power_up 2650 if (hci_stack->chipset && hci_stack->chipset->init){ 2651 hci_stack->chipset->init(hci_stack->config); 2652 } 2653 } 2654 2655 /** 2656 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2657 */ 2658 void hci_set_control(const btstack_control_t *hardware_control){ 2659 // references to used control implementation 2660 hci_stack->control = hardware_control; 2661 // init with transport config 2662 hardware_control->init(hci_stack->config); 2663 } 2664 2665 void hci_close(void){ 2666 // close remote device db 2667 if (hci_stack->link_key_db) { 2668 hci_stack->link_key_db->close(); 2669 } 2670 2671 btstack_linked_list_iterator_t lit; 2672 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2673 while (btstack_linked_list_iterator_has_next(&lit)){ 2674 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2675 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2676 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2677 hci_shutdown_connection(connection); 2678 } 2679 2680 hci_power_control(HCI_POWER_OFF); 2681 2682 #ifdef HAVE_MALLOC 2683 free(hci_stack); 2684 #endif 2685 hci_stack = NULL; 2686 } 2687 2688 #ifdef ENABLE_CLASSIC 2689 void gap_set_class_of_device(uint32_t class_of_device){ 2690 hci_stack->class_of_device = class_of_device; 2691 } 2692 2693 void hci_disable_l2cap_timeout_check(void){ 2694 disable_l2cap_timeouts = 1; 2695 } 2696 #endif 2697 2698 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2699 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2700 void hci_set_bd_addr(bd_addr_t addr){ 2701 memcpy(hci_stack->custom_bd_addr, addr, 6); 2702 hci_stack->custom_bd_addr_set = 1; 2703 } 2704 #endif 2705 2706 // State-Module-Driver overview 2707 // state module low-level 2708 // HCI_STATE_OFF off close 2709 // HCI_STATE_INITIALIZING, on open 2710 // HCI_STATE_WORKING, on open 2711 // HCI_STATE_HALTING, on open 2712 // HCI_STATE_SLEEPING, off/sleep close 2713 // HCI_STATE_FALLING_ASLEEP on open 2714 2715 static int hci_power_control_on(void){ 2716 2717 // power on 2718 int err = 0; 2719 if (hci_stack->control && hci_stack->control->on){ 2720 err = (*hci_stack->control->on)(); 2721 } 2722 if (err){ 2723 log_error( "POWER_ON failed"); 2724 hci_emit_hci_open_failed(); 2725 return err; 2726 } 2727 2728 // int chipset driver 2729 if (hci_stack->chipset && hci_stack->chipset->init){ 2730 hci_stack->chipset->init(hci_stack->config); 2731 } 2732 2733 // init transport 2734 if (hci_stack->hci_transport->init){ 2735 hci_stack->hci_transport->init(hci_stack->config); 2736 } 2737 2738 // open transport 2739 err = hci_stack->hci_transport->open(); 2740 if (err){ 2741 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2742 if (hci_stack->control && hci_stack->control->off){ 2743 (*hci_stack->control->off)(); 2744 } 2745 hci_emit_hci_open_failed(); 2746 return err; 2747 } 2748 return 0; 2749 } 2750 2751 static void hci_power_control_off(void){ 2752 2753 log_info("hci_power_control_off"); 2754 2755 // close low-level device 2756 hci_stack->hci_transport->close(); 2757 2758 log_info("hci_power_control_off - hci_transport closed"); 2759 2760 // power off 2761 if (hci_stack->control && hci_stack->control->off){ 2762 (*hci_stack->control->off)(); 2763 } 2764 2765 log_info("hci_power_control_off - control closed"); 2766 2767 hci_stack->state = HCI_STATE_OFF; 2768 } 2769 2770 static void hci_power_control_sleep(void){ 2771 2772 log_info("hci_power_control_sleep"); 2773 2774 #if 0 2775 // don't close serial port during sleep 2776 2777 // close low-level device 2778 hci_stack->hci_transport->close(hci_stack->config); 2779 #endif 2780 2781 // sleep mode 2782 if (hci_stack->control && hci_stack->control->sleep){ 2783 (*hci_stack->control->sleep)(); 2784 } 2785 2786 hci_stack->state = HCI_STATE_SLEEPING; 2787 } 2788 2789 static int hci_power_control_wake(void){ 2790 2791 log_info("hci_power_control_wake"); 2792 2793 // wake on 2794 if (hci_stack->control && hci_stack->control->wake){ 2795 (*hci_stack->control->wake)(); 2796 } 2797 2798 #if 0 2799 // open low-level device 2800 int err = hci_stack->hci_transport->open(hci_stack->config); 2801 if (err){ 2802 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2803 if (hci_stack->control && hci_stack->control->off){ 2804 (*hci_stack->control->off)(); 2805 } 2806 hci_emit_hci_open_failed(); 2807 return err; 2808 } 2809 #endif 2810 2811 return 0; 2812 } 2813 2814 static void hci_power_transition_to_initializing(void){ 2815 // set up state machine 2816 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2817 hci_stack->hci_packet_buffer_reserved = 0; 2818 hci_stack->state = HCI_STATE_INITIALIZING; 2819 hci_stack->substate = HCI_INIT_SEND_RESET; 2820 } 2821 2822 int hci_power_control(HCI_POWER_MODE power_mode){ 2823 2824 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2825 2826 int err = 0; 2827 switch (hci_stack->state){ 2828 2829 case HCI_STATE_OFF: 2830 switch (power_mode){ 2831 case HCI_POWER_ON: 2832 err = hci_power_control_on(); 2833 if (err) { 2834 log_error("hci_power_control_on() error %d", err); 2835 return err; 2836 } 2837 hci_power_transition_to_initializing(); 2838 break; 2839 case HCI_POWER_OFF: 2840 // do nothing 2841 break; 2842 case HCI_POWER_SLEEP: 2843 // do nothing (with SLEEP == OFF) 2844 break; 2845 } 2846 break; 2847 2848 case HCI_STATE_INITIALIZING: 2849 switch (power_mode){ 2850 case HCI_POWER_ON: 2851 // do nothing 2852 break; 2853 case HCI_POWER_OFF: 2854 // no connections yet, just turn it off 2855 hci_power_control_off(); 2856 break; 2857 case HCI_POWER_SLEEP: 2858 // no connections yet, just turn it off 2859 hci_power_control_sleep(); 2860 break; 2861 } 2862 break; 2863 2864 case HCI_STATE_WORKING: 2865 switch (power_mode){ 2866 case HCI_POWER_ON: 2867 // do nothing 2868 break; 2869 case HCI_POWER_OFF: 2870 // see hci_run 2871 hci_stack->state = HCI_STATE_HALTING; 2872 break; 2873 case HCI_POWER_SLEEP: 2874 // see hci_run 2875 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2876 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2877 break; 2878 } 2879 break; 2880 2881 case HCI_STATE_HALTING: 2882 switch (power_mode){ 2883 case HCI_POWER_ON: 2884 hci_power_transition_to_initializing(); 2885 break; 2886 case HCI_POWER_OFF: 2887 // do nothing 2888 break; 2889 case HCI_POWER_SLEEP: 2890 // see hci_run 2891 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2892 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2893 break; 2894 } 2895 break; 2896 2897 case HCI_STATE_FALLING_ASLEEP: 2898 switch (power_mode){ 2899 case HCI_POWER_ON: 2900 2901 #ifdef HAVE_PLATFORM_IPHONE_OS 2902 // nothing to do, if H4 supports power management 2903 if (btstack_control_iphone_power_management_enabled()){ 2904 hci_stack->state = HCI_STATE_INITIALIZING; 2905 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2906 break; 2907 } 2908 #endif 2909 hci_power_transition_to_initializing(); 2910 break; 2911 case HCI_POWER_OFF: 2912 // see hci_run 2913 hci_stack->state = HCI_STATE_HALTING; 2914 break; 2915 case HCI_POWER_SLEEP: 2916 // do nothing 2917 break; 2918 } 2919 break; 2920 2921 case HCI_STATE_SLEEPING: 2922 switch (power_mode){ 2923 case HCI_POWER_ON: 2924 2925 #ifdef HAVE_PLATFORM_IPHONE_OS 2926 // nothing to do, if H4 supports power management 2927 if (btstack_control_iphone_power_management_enabled()){ 2928 hci_stack->state = HCI_STATE_INITIALIZING; 2929 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2930 hci_update_scan_enable(); 2931 break; 2932 } 2933 #endif 2934 err = hci_power_control_wake(); 2935 if (err) return err; 2936 hci_power_transition_to_initializing(); 2937 break; 2938 case HCI_POWER_OFF: 2939 hci_stack->state = HCI_STATE_HALTING; 2940 break; 2941 case HCI_POWER_SLEEP: 2942 // do nothing 2943 break; 2944 } 2945 break; 2946 } 2947 2948 // create internal event 2949 hci_emit_state(); 2950 2951 // trigger next/first action 2952 hci_run(); 2953 2954 return 0; 2955 } 2956 2957 2958 #ifdef ENABLE_CLASSIC 2959 2960 static void hci_update_scan_enable(void){ 2961 // 2 = page scan, 1 = inq scan 2962 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2963 hci_run(); 2964 } 2965 2966 void gap_discoverable_control(uint8_t enable){ 2967 if (enable) enable = 1; // normalize argument 2968 2969 if (hci_stack->discoverable == enable){ 2970 hci_emit_discoverable_enabled(hci_stack->discoverable); 2971 return; 2972 } 2973 2974 hci_stack->discoverable = enable; 2975 hci_update_scan_enable(); 2976 } 2977 2978 void gap_connectable_control(uint8_t enable){ 2979 if (enable) enable = 1; // normalize argument 2980 2981 // don't emit event 2982 if (hci_stack->connectable == enable) return; 2983 2984 hci_stack->connectable = enable; 2985 hci_update_scan_enable(); 2986 } 2987 #endif 2988 2989 void gap_local_bd_addr(bd_addr_t address_buffer){ 2990 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2991 } 2992 2993 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2994 static void hci_host_num_completed_packets(void){ 2995 2996 // create packet manually as arrays are not supported and num_commands should not get reduced 2997 hci_reserve_packet_buffer(); 2998 uint8_t * packet = hci_get_outgoing_packet_buffer(); 2999 3000 uint16_t size = 0; 3001 uint16_t num_handles = 0; 3002 packet[size++] = 0x35; 3003 packet[size++] = 0x0c; 3004 size++; // skip param len 3005 size++; // skip num handles 3006 3007 // add { handle, packets } entries 3008 btstack_linked_item_t * it; 3009 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3010 hci_connection_t * connection = (hci_connection_t *) it; 3011 if (connection->num_packets_completed){ 3012 little_endian_store_16(packet, size, connection->con_handle); 3013 size += 2; 3014 little_endian_store_16(packet, size, connection->num_packets_completed); 3015 size += 2; 3016 // 3017 num_handles++; 3018 connection->num_packets_completed = 0; 3019 } 3020 } 3021 3022 packet[2] = size - 3; 3023 packet[3] = num_handles; 3024 3025 hci_stack->host_completed_packets = 0; 3026 3027 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3028 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3029 3030 // release packet buffer for synchronous transport implementations 3031 if (hci_transport_synchronous()){ 3032 hci_release_packet_buffer(); 3033 hci_emit_transport_packet_sent(); 3034 } 3035 } 3036 #endif 3037 3038 static void hci_run(void){ 3039 3040 // log_info("hci_run: entered"); 3041 btstack_linked_item_t * it; 3042 3043 // send continuation fragments first, as they block the prepared packet buffer 3044 if (hci_stack->acl_fragmentation_total_size > 0) { 3045 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3046 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3047 if (connection) { 3048 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3049 hci_send_acl_packet_fragments(connection); 3050 return; 3051 } 3052 } else { 3053 // connection gone -> discard further fragments 3054 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3055 hci_stack->acl_fragmentation_total_size = 0; 3056 hci_stack->acl_fragmentation_pos = 0; 3057 } 3058 } 3059 3060 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3061 // send host num completed packets next as they don't require num_cmd_packets > 0 3062 if (!hci_can_send_comand_packet_transport()) return; 3063 if (hci_stack->host_completed_packets){ 3064 hci_host_num_completed_packets(); 3065 return; 3066 } 3067 #endif 3068 3069 if (!hci_can_send_command_packet_now()) return; 3070 3071 // global/non-connection oriented commands 3072 3073 #ifdef ENABLE_CLASSIC 3074 // decline incoming connections 3075 if (hci_stack->decline_reason){ 3076 uint8_t reason = hci_stack->decline_reason; 3077 hci_stack->decline_reason = 0; 3078 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3079 return; 3080 } 3081 // send scan enable 3082 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 3083 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3084 hci_stack->new_scan_enable_value = 0xff; 3085 return; 3086 } 3087 // start/stop inquiry 3088 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 3089 uint8_t duration = hci_stack->inquiry_state; 3090 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3091 hci_send_cmd(&hci_inquiry, HCI_INQUIRY_LAP, duration, 0); 3092 return; 3093 } 3094 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3095 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3096 hci_send_cmd(&hci_inquiry_cancel); 3097 return; 3098 } 3099 // remote name request 3100 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3101 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3102 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3103 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3104 return; 3105 } 3106 // pairing 3107 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3108 uint8_t state = hci_stack->gap_pairing_state; 3109 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3110 switch (state){ 3111 case GAP_PAIRING_STATE_SEND_PIN: 3112 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); 3113 break; 3114 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3115 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3116 break; 3117 case GAP_PAIRING_STATE_SEND_PASSKEY: 3118 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3119 break; 3120 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3121 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3122 break; 3123 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3124 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3125 break; 3126 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3127 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3128 break; 3129 default: 3130 break; 3131 } 3132 return; 3133 } 3134 #endif 3135 3136 #ifdef ENABLE_BLE 3137 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 3138 if ((hci_stack->state == HCI_STATE_WORKING) 3139 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 3140 3141 #ifdef ENABLE_LE_CENTRAL 3142 // handle le scan 3143 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3144 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3145 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3146 return; 3147 } 3148 if (hci_stack->le_scan_type != 0xff){ 3149 // defaults: active scanning, accept all advertisement packets 3150 int scan_type = hci_stack->le_scan_type; 3151 hci_stack->le_scan_type = 0xff; 3152 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); 3153 return; 3154 } 3155 #endif 3156 #ifdef ENABLE_LE_PERIPHERAL 3157 // le advertisement control 3158 if (hci_stack->le_advertisements_todo){ 3159 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3160 } 3161 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3162 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3163 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3164 return; 3165 } 3166 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3167 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3168 hci_send_cmd(&hci_le_set_advertising_parameters, 3169 hci_stack->le_advertisements_interval_min, 3170 hci_stack->le_advertisements_interval_max, 3171 hci_stack->le_advertisements_type, 3172 hci_stack->le_own_addr_type, 3173 hci_stack->le_advertisements_direct_address_type, 3174 hci_stack->le_advertisements_direct_address, 3175 hci_stack->le_advertisements_channel_map, 3176 hci_stack->le_advertisements_filter_policy); 3177 return; 3178 } 3179 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3180 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3181 uint8_t adv_data_clean[31]; 3182 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3183 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3184 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3185 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3186 return; 3187 } 3188 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3189 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3190 uint8_t scan_data_clean[31]; 3191 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3192 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3193 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3194 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, hci_stack->le_scan_response_data); 3195 return; 3196 } 3197 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3198 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3199 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3200 return; 3201 } 3202 #endif 3203 3204 #ifdef ENABLE_LE_CENTRAL 3205 // 3206 // LE Whitelist Management 3207 // 3208 3209 // check if whitelist needs modification 3210 btstack_linked_list_iterator_t lit; 3211 int modification_pending = 0; 3212 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3213 while (btstack_linked_list_iterator_has_next(&lit)){ 3214 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3215 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3216 modification_pending = 1; 3217 break; 3218 } 3219 } 3220 3221 if (modification_pending){ 3222 // stop connnecting if modification pending 3223 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3224 hci_send_cmd(&hci_le_create_connection_cancel); 3225 return; 3226 } 3227 3228 // add/remove entries 3229 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3230 while (btstack_linked_list_iterator_has_next(&lit)){ 3231 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3232 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3233 entry->state = LE_WHITELIST_ON_CONTROLLER; 3234 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3235 return; 3236 3237 } 3238 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3239 bd_addr_t address; 3240 bd_addr_type_t address_type = entry->address_type; 3241 memcpy(address, entry->address, 6); 3242 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3243 btstack_memory_whitelist_entry_free(entry); 3244 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3245 return; 3246 } 3247 } 3248 } 3249 3250 // start connecting 3251 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3252 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3253 bd_addr_t null_addr; 3254 memset(null_addr, 0, 6); 3255 hci_send_cmd(&hci_le_create_connection, 3256 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3257 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3258 1, // use whitelist 3259 0, // peer address type 3260 null_addr, // peer bd addr 3261 hci_stack->le_own_addr_type, // our addr type: 3262 hci_stack->le_connection_interval_min, // conn interval min 3263 hci_stack->le_connection_interval_max, // conn interval max 3264 hci_stack->le_connection_latency, // conn latency 3265 hci_stack->le_supervision_timeout, // conn latency 3266 hci_stack->le_minimum_ce_length, // min ce length 3267 hci_stack->le_maximum_ce_length // max ce length 3268 ); 3269 return; 3270 } 3271 #endif 3272 } 3273 #endif 3274 3275 // send pending HCI commands 3276 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3277 hci_connection_t * connection = (hci_connection_t *) it; 3278 3279 switch(connection->state){ 3280 case SEND_CREATE_CONNECTION: 3281 switch(connection->address_type){ 3282 #ifdef ENABLE_CLASSIC 3283 case BD_ADDR_TYPE_CLASSIC: 3284 log_info("sending hci_create_connection"); 3285 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3286 break; 3287 #endif 3288 default: 3289 #ifdef ENABLE_BLE 3290 #ifdef ENABLE_LE_CENTRAL 3291 // track outgoing connection 3292 hci_stack->outgoing_addr_type = connection->address_type; 3293 memcpy(hci_stack->outgoing_addr, connection->address, 6); 3294 log_info("sending hci_le_create_connection"); 3295 hci_send_cmd(&hci_le_create_connection, 3296 hci_stack->le_connection_scan_interval, // conn scan interval 3297 hci_stack->le_connection_scan_window, // conn scan windows 3298 0, // don't use whitelist 3299 connection->address_type, // peer address type 3300 connection->address, // peer bd addr 3301 hci_stack->le_own_addr_type, // our addr type: 3302 hci_stack->le_connection_interval_min, // conn interval min 3303 hci_stack->le_connection_interval_max, // conn interval max 3304 hci_stack->le_connection_latency, // conn latency 3305 hci_stack->le_supervision_timeout, // conn latency 3306 hci_stack->le_minimum_ce_length, // min ce length 3307 hci_stack->le_maximum_ce_length // max ce length 3308 ); 3309 connection->state = SENT_CREATE_CONNECTION; 3310 #endif 3311 #endif 3312 break; 3313 } 3314 return; 3315 3316 #ifdef ENABLE_CLASSIC 3317 case RECEIVED_CONNECTION_REQUEST: 3318 connection->role = HCI_ROLE_SLAVE; 3319 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3320 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3321 connection->state = ACCEPTED_CONNECTION_REQUEST; 3322 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3323 } 3324 return; 3325 #endif 3326 3327 #ifdef ENABLE_BLE 3328 #ifdef ENABLE_LE_CENTRAL 3329 case SEND_CANCEL_CONNECTION: 3330 connection->state = SENT_CANCEL_CONNECTION; 3331 hci_send_cmd(&hci_le_create_connection_cancel); 3332 return; 3333 #endif 3334 #endif 3335 case SEND_DISCONNECT: 3336 connection->state = SENT_DISCONNECT; 3337 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3338 return; 3339 3340 default: 3341 break; 3342 } 3343 3344 #ifdef ENABLE_CLASSIC 3345 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3346 log_info("responding to link key request"); 3347 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3348 link_key_t link_key; 3349 link_key_type_t link_key_type; 3350 if ( hci_stack->link_key_db 3351 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3352 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3353 connection->link_key_type = link_key_type; 3354 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3355 } else { 3356 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3357 } 3358 return; 3359 } 3360 3361 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3362 log_info("denying to pin request"); 3363 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3364 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3365 return; 3366 } 3367 3368 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3369 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3370 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3371 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3372 // tweak authentication requirements 3373 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3374 if (connection->bonding_flags & BONDING_DEDICATED){ 3375 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3376 } 3377 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3378 authreq |= 1; 3379 } 3380 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3381 } else { 3382 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3383 } 3384 return; 3385 } 3386 3387 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3388 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3389 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3390 return; 3391 } 3392 3393 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3394 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3395 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3396 return; 3397 } 3398 3399 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3400 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3401 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3402 return; 3403 } 3404 3405 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3406 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3407 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3408 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3409 return; 3410 } 3411 3412 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3413 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3414 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3415 return; 3416 } 3417 3418 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3419 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3420 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3421 return; 3422 } 3423 #endif 3424 3425 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3426 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3427 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3428 return; 3429 } 3430 3431 #ifdef ENABLE_BLE 3432 switch (connection->le_con_parameter_update_state){ 3433 // response to L2CAP CON PARAMETER UPDATE REQUEST 3434 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3435 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3436 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3437 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3438 0x0000, 0xffff); 3439 break; 3440 case CON_PARAMETER_UPDATE_REPLY: 3441 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3442 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3443 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3444 0x0000, 0xffff); 3445 break; 3446 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3447 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3448 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3449 break; 3450 default: 3451 break; 3452 } 3453 #endif 3454 } 3455 3456 hci_connection_t * connection; 3457 switch (hci_stack->state){ 3458 case HCI_STATE_INITIALIZING: 3459 hci_initializing_run(); 3460 break; 3461 3462 case HCI_STATE_HALTING: 3463 3464 log_info("HCI_STATE_HALTING"); 3465 3466 // free whitelist entries 3467 #ifdef ENABLE_BLE 3468 #ifdef ENABLE_LE_CENTRAL 3469 { 3470 btstack_linked_list_iterator_t lit; 3471 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3472 while (btstack_linked_list_iterator_has_next(&lit)){ 3473 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3474 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3475 btstack_memory_whitelist_entry_free(entry); 3476 } 3477 } 3478 #endif 3479 #endif 3480 // close all open connections 3481 connection = (hci_connection_t *) hci_stack->connections; 3482 if (connection){ 3483 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3484 if (!hci_can_send_command_packet_now()) return; 3485 3486 // check state 3487 if (connection->state == SENT_DISCONNECT) return; 3488 connection->state = SENT_DISCONNECT; 3489 3490 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3491 3492 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3493 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3494 3495 // ... which would be ignored anyway as we shutdown (free) the connection now 3496 hci_shutdown_connection(connection); 3497 3498 // finally, send the disconnect command 3499 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3500 return; 3501 } 3502 log_info("HCI_STATE_HALTING, calling off"); 3503 3504 // switch mode 3505 hci_power_control_off(); 3506 3507 log_info("HCI_STATE_HALTING, emitting state"); 3508 hci_emit_state(); 3509 log_info("HCI_STATE_HALTING, done"); 3510 break; 3511 3512 case HCI_STATE_FALLING_ASLEEP: 3513 switch(hci_stack->substate) { 3514 case HCI_FALLING_ASLEEP_DISCONNECT: 3515 log_info("HCI_STATE_FALLING_ASLEEP"); 3516 // close all open connections 3517 connection = (hci_connection_t *) hci_stack->connections; 3518 3519 #ifdef HAVE_PLATFORM_IPHONE_OS 3520 // don't close connections, if H4 supports power management 3521 if (btstack_control_iphone_power_management_enabled()){ 3522 connection = NULL; 3523 } 3524 #endif 3525 if (connection){ 3526 3527 // send disconnect 3528 if (!hci_can_send_command_packet_now()) return; 3529 3530 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3531 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3532 3533 // send disconnected event right away - causes higher layer connections to get closed, too. 3534 hci_shutdown_connection(connection); 3535 return; 3536 } 3537 3538 if (hci_classic_supported()){ 3539 // disable page and inquiry scan 3540 if (!hci_can_send_command_packet_now()) return; 3541 3542 log_info("HCI_STATE_HALTING, disabling inq scans"); 3543 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3544 3545 // continue in next sub state 3546 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3547 break; 3548 } 3549 // no break - fall through for ble-only chips 3550 3551 case HCI_FALLING_ASLEEP_COMPLETE: 3552 log_info("HCI_STATE_HALTING, calling sleep"); 3553 #ifdef HAVE_PLATFORM_IPHONE_OS 3554 // don't actually go to sleep, if H4 supports power management 3555 if (btstack_control_iphone_power_management_enabled()){ 3556 // SLEEP MODE reached 3557 hci_stack->state = HCI_STATE_SLEEPING; 3558 hci_emit_state(); 3559 break; 3560 } 3561 #endif 3562 // switch mode 3563 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3564 hci_emit_state(); 3565 break; 3566 3567 default: 3568 break; 3569 } 3570 break; 3571 3572 default: 3573 break; 3574 } 3575 } 3576 3577 int hci_send_cmd_packet(uint8_t *packet, int size){ 3578 // house-keeping 3579 3580 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3581 hci_stack->loopback_mode = packet[3]; 3582 } 3583 3584 #ifdef ENABLE_CLASSIC 3585 bd_addr_t addr; 3586 hci_connection_t * conn; 3587 3588 // create_connection? 3589 if (IS_COMMAND(packet, hci_create_connection)){ 3590 reverse_bd_addr(&packet[3], addr); 3591 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3592 3593 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3594 if (!conn){ 3595 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3596 if (!conn){ 3597 // notify client that alloc failed 3598 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3599 return -1; // packet not sent to controller 3600 } 3601 conn->state = SEND_CREATE_CONNECTION; 3602 } 3603 log_info("conn state %u", conn->state); 3604 switch (conn->state){ 3605 // if connection active exists 3606 case OPEN: 3607 // and OPEN, emit connection complete command 3608 hci_emit_connection_complete(addr, conn->con_handle, 0); 3609 return -1; // packet not sent to controller 3610 case SEND_CREATE_CONNECTION: 3611 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 3612 break; 3613 default: 3614 // otherwise, just ignore as it is already in the open process 3615 return -1; // packet not sent to controller 3616 } 3617 conn->state = SENT_CREATE_CONNECTION; 3618 3619 // track outgoing connection 3620 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_CLASSIC; 3621 memcpy(hci_stack->outgoing_addr, addr, 6); 3622 } 3623 3624 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3625 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3626 } 3627 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3628 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3629 } 3630 3631 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3632 if (hci_stack->link_key_db){ 3633 reverse_bd_addr(&packet[3], addr); 3634 hci_stack->link_key_db->delete_link_key(addr); 3635 } 3636 } 3637 3638 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3639 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3640 reverse_bd_addr(&packet[3], addr); 3641 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3642 if (conn){ 3643 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3644 } 3645 } 3646 3647 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3648 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3649 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3650 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3651 reverse_bd_addr(&packet[3], addr); 3652 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3653 if (conn){ 3654 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3655 } 3656 } 3657 3658 #ifdef ENABLE_SCO_OVER_HCI 3659 // setup_synchronous_connection? Voice setting at offset 22 3660 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3661 // TODO: compare to current setting if sco connection already active 3662 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3663 } 3664 // accept_synchronus_connection? Voice setting at offset 18 3665 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3666 // TODO: compare to current setting if sco connection already active 3667 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3668 } 3669 #endif 3670 #endif 3671 3672 #ifdef ENABLE_BLE 3673 #ifdef ENABLE_LE_PERIPHERAL 3674 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3675 hci_stack->le_random_address_set = 1; 3676 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3677 } 3678 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3679 hci_stack->le_advertisements_active = packet[3]; 3680 } 3681 #endif 3682 #ifdef ENABLE_LE_CENTRAL 3683 if (IS_COMMAND(packet, hci_le_create_connection)){ 3684 // white list used? 3685 uint8_t initiator_filter_policy = packet[7]; 3686 switch (initiator_filter_policy){ 3687 case 0: 3688 // whitelist not used 3689 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3690 break; 3691 case 1: 3692 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3693 break; 3694 default: 3695 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3696 break; 3697 } 3698 } 3699 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3700 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3701 } 3702 #endif 3703 #endif 3704 3705 hci_stack->num_cmd_packets--; 3706 3707 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3708 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3709 } 3710 3711 // disconnect because of security block 3712 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3713 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3714 if (!connection) return; 3715 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3716 } 3717 3718 3719 // Configure Secure Simple Pairing 3720 3721 #ifdef ENABLE_CLASSIC 3722 3723 // enable will enable SSP during init 3724 void gap_ssp_set_enable(int enable){ 3725 hci_stack->ssp_enable = enable; 3726 } 3727 3728 static int hci_local_ssp_activated(void){ 3729 return gap_ssp_supported() && hci_stack->ssp_enable; 3730 } 3731 3732 // if set, BTstack will respond to io capability request using authentication requirement 3733 void gap_ssp_set_io_capability(int io_capability){ 3734 hci_stack->ssp_io_capability = io_capability; 3735 } 3736 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3737 hci_stack->ssp_authentication_requirement = authentication_requirement; 3738 } 3739 3740 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3741 void gap_ssp_set_auto_accept(int auto_accept){ 3742 hci_stack->ssp_auto_accept = auto_accept; 3743 } 3744 #endif 3745 3746 // va_list part of hci_send_cmd 3747 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3748 if (!hci_can_send_command_packet_now()){ 3749 log_error("hci_send_cmd called but cannot send packet now"); 3750 return 0; 3751 } 3752 3753 // for HCI INITIALIZATION 3754 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3755 hci_stack->last_cmd_opcode = cmd->opcode; 3756 3757 hci_reserve_packet_buffer(); 3758 uint8_t * packet = hci_stack->hci_packet_buffer; 3759 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3760 int err = hci_send_cmd_packet(packet, size); 3761 3762 // release packet buffer for synchronous transport implementations 3763 if (hci_transport_synchronous()){ 3764 hci_release_packet_buffer(); 3765 hci_emit_transport_packet_sent(); 3766 } 3767 3768 return err; 3769 } 3770 3771 /** 3772 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3773 */ 3774 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3775 va_list argptr; 3776 va_start(argptr, cmd); 3777 int res = hci_send_cmd_va_arg(cmd, argptr); 3778 va_end(argptr); 3779 return res; 3780 } 3781 3782 // Create various non-HCI events. 3783 // TODO: generalize, use table similar to hci_create_command 3784 3785 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3786 // dump packet 3787 if (dump) { 3788 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3789 } 3790 3791 // dispatch to all event handlers 3792 btstack_linked_list_iterator_t it; 3793 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3794 while (btstack_linked_list_iterator_has_next(&it)){ 3795 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3796 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3797 } 3798 } 3799 3800 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3801 if (!hci_stack->acl_packet_handler) return; 3802 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3803 } 3804 3805 #ifdef ENABLE_CLASSIC 3806 static void hci_notify_if_sco_can_send_now(void){ 3807 // notify SCO sender if waiting 3808 if (!hci_stack->sco_waiting_for_can_send_now) return; 3809 if (hci_can_send_sco_packet_now()){ 3810 hci_stack->sco_waiting_for_can_send_now = 0; 3811 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3812 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3813 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3814 } 3815 } 3816 3817 // parsing end emitting has been merged to reduce code size 3818 static void gap_inquiry_explode(uint8_t * packet){ 3819 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 3820 3821 uint8_t * eir_data; 3822 ad_context_t context; 3823 const uint8_t * name; 3824 uint8_t name_len; 3825 3826 int event_type = hci_event_packet_get_type(packet); 3827 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3828 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 3829 3830 // event[1] is set at the end 3831 int i; 3832 for (i=0; i<num_responses;i++){ 3833 memset(event, 0, sizeof(event)); 3834 event[0] = GAP_EVENT_INQUIRY_RESULT; 3835 uint8_t event_size = 18; // if name is not set by EIR 3836 3837 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 3838 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 3839 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 3840 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 3841 3842 switch (event_type){ 3843 case HCI_EVENT_INQUIRY_RESULT: 3844 // 14,15,16,17 = 0, size 18 3845 break; 3846 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3847 event[14] = 1; 3848 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3849 // 16,17 = 0, size 18 3850 break; 3851 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3852 event[14] = 1; 3853 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3854 // for EIR packets, there is only one reponse in it 3855 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 3856 name = NULL; 3857 // EIR data is 240 bytes in EIR event 3858 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 3859 uint8_t data_type = ad_iterator_get_data_type(&context); 3860 uint8_t data_size = ad_iterator_get_data_len(&context); 3861 const uint8_t * data = ad_iterator_get_data(&context); 3862 // Prefer Complete Local Name over Shortend Local Name 3863 switch (data_type){ 3864 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 3865 if (name) continue; 3866 /* explicit fall-through */ 3867 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 3868 name = data; 3869 name_len = data_size; 3870 break; 3871 default: 3872 break; 3873 } 3874 } 3875 if (name){ 3876 event[16] = 1; 3877 // truncate name if needed 3878 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 3879 event[17] = len; 3880 memcpy(&event[18], name, len); 3881 event_size += len; 3882 } 3883 break; 3884 } 3885 event[1] = event_size - 2; 3886 hci_emit_event(event, event_size, 1); 3887 } 3888 } 3889 #endif 3890 3891 void hci_emit_state(void){ 3892 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3893 uint8_t event[3]; 3894 event[0] = BTSTACK_EVENT_STATE; 3895 event[1] = sizeof(event) - 2; 3896 event[2] = hci_stack->state; 3897 hci_emit_event(event, sizeof(event), 1); 3898 } 3899 3900 #ifdef ENABLE_CLASSIC 3901 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3902 uint8_t event[13]; 3903 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3904 event[1] = sizeof(event) - 2; 3905 event[2] = status; 3906 little_endian_store_16(event, 3, con_handle); 3907 reverse_bd_addr(address, &event[5]); 3908 event[11] = 1; // ACL connection 3909 event[12] = 0; // encryption disabled 3910 hci_emit_event(event, sizeof(event), 1); 3911 } 3912 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3913 if (disable_l2cap_timeouts) return; 3914 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3915 uint8_t event[4]; 3916 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3917 event[1] = sizeof(event) - 2; 3918 little_endian_store_16(event, 2, conn->con_handle); 3919 hci_emit_event(event, sizeof(event), 1); 3920 } 3921 #endif 3922 3923 #ifdef ENABLE_BLE 3924 #ifdef ENABLE_LE_CENTRAL 3925 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3926 uint8_t event[21]; 3927 event[0] = HCI_EVENT_LE_META; 3928 event[1] = sizeof(event) - 2; 3929 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3930 event[3] = status; 3931 little_endian_store_16(event, 4, con_handle); 3932 event[6] = 0; // TODO: role 3933 event[7] = address_type; 3934 reverse_bd_addr(address, &event[8]); 3935 little_endian_store_16(event, 14, 0); // interval 3936 little_endian_store_16(event, 16, 0); // latency 3937 little_endian_store_16(event, 18, 0); // supervision timeout 3938 event[20] = 0; // master clock accuracy 3939 hci_emit_event(event, sizeof(event), 1); 3940 } 3941 #endif 3942 #endif 3943 3944 static void hci_emit_transport_packet_sent(void){ 3945 // notify upper stack that it might be possible to send again 3946 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 3947 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 3948 } 3949 3950 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3951 uint8_t event[6]; 3952 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3953 event[1] = sizeof(event) - 2; 3954 event[2] = 0; // status = OK 3955 little_endian_store_16(event, 3, con_handle); 3956 event[5] = reason; 3957 hci_emit_event(event, sizeof(event), 1); 3958 } 3959 3960 static void hci_emit_nr_connections_changed(void){ 3961 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3962 uint8_t event[3]; 3963 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3964 event[1] = sizeof(event) - 2; 3965 event[2] = nr_hci_connections(); 3966 hci_emit_event(event, sizeof(event), 1); 3967 } 3968 3969 static void hci_emit_hci_open_failed(void){ 3970 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3971 uint8_t event[2]; 3972 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3973 event[1] = sizeof(event) - 2; 3974 hci_emit_event(event, sizeof(event), 1); 3975 } 3976 3977 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3978 log_info("hci_emit_dedicated_bonding_result %u ", status); 3979 uint8_t event[9]; 3980 int pos = 0; 3981 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3982 event[pos++] = sizeof(event) - 2; 3983 event[pos++] = status; 3984 reverse_bd_addr(address, &event[pos]); 3985 hci_emit_event(event, sizeof(event), 1); 3986 } 3987 3988 3989 #ifdef ENABLE_CLASSIC 3990 3991 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3992 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3993 uint8_t event[5]; 3994 int pos = 0; 3995 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3996 event[pos++] = sizeof(event) - 2; 3997 little_endian_store_16(event, 2, con_handle); 3998 pos += 2; 3999 event[pos++] = level; 4000 hci_emit_event(event, sizeof(event), 1); 4001 } 4002 4003 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4004 if (!connection) return LEVEL_0; 4005 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4006 return gap_security_level_for_link_key_type(connection->link_key_type); 4007 } 4008 4009 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4010 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4011 uint8_t event[3]; 4012 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4013 event[1] = sizeof(event) - 2; 4014 event[2] = enabled; 4015 hci_emit_event(event, sizeof(event), 1); 4016 } 4017 4018 #ifdef ENABLE_CLASSIC 4019 // query if remote side supports eSCO 4020 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4021 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4022 if (!connection) return 0; 4023 return connection->remote_supported_feature_eSCO; 4024 } 4025 4026 // query if remote side supports SSP 4027 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4028 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4029 if (!connection) return 0; 4030 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4031 } 4032 4033 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4034 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4035 } 4036 #endif 4037 4038 // GAP API 4039 /** 4040 * @bbrief enable/disable bonding. default is enabled 4041 * @praram enabled 4042 */ 4043 void gap_set_bondable_mode(int enable){ 4044 hci_stack->bondable = enable ? 1 : 0; 4045 } 4046 /** 4047 * @brief Get bondable mode. 4048 * @return 1 if bondable 4049 */ 4050 int gap_get_bondable_mode(void){ 4051 return hci_stack->bondable; 4052 } 4053 4054 /** 4055 * @brief map link keys to security levels 4056 */ 4057 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4058 switch (link_key_type){ 4059 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4060 return LEVEL_4; 4061 case COMBINATION_KEY: 4062 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4063 return LEVEL_3; 4064 default: 4065 return LEVEL_2; 4066 } 4067 } 4068 4069 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4070 log_info("gap_mitm_protection_required_for_security_level %u", level); 4071 return level > LEVEL_2; 4072 } 4073 4074 /** 4075 * @brief get current security level 4076 */ 4077 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4078 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4079 if (!connection) return LEVEL_0; 4080 return gap_security_level_for_connection(connection); 4081 } 4082 4083 /** 4084 * @brief request connection to device to 4085 * @result GAP_AUTHENTICATION_RESULT 4086 */ 4087 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4088 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4089 if (!connection){ 4090 hci_emit_security_level(con_handle, LEVEL_0); 4091 return; 4092 } 4093 gap_security_level_t current_level = gap_security_level(con_handle); 4094 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4095 requested_level, connection->requested_security_level, current_level); 4096 4097 // assumption: earlier requested security higher than current level => security request is active 4098 if (current_level < connection->requested_security_level){ 4099 if (connection->requested_security_level < requested_level){ 4100 // increase requested level as new level is higher 4101 4102 // TODO: handle re-authentication when done 4103 4104 connection->requested_security_level = requested_level; 4105 } 4106 return; 4107 } 4108 4109 // no request active, notify if security sufficient 4110 if (requested_level <= current_level){ 4111 hci_emit_security_level(con_handle, current_level); 4112 return; 4113 } 4114 4115 // start pairing to increase security level 4116 connection->requested_security_level = requested_level; 4117 4118 #if 0 4119 // sending encryption request without a link key results in an error. 4120 // TODO: figure out how to use it properly 4121 4122 // would enabling ecnryption suffice (>= LEVEL_2)? 4123 if (hci_stack->link_key_db){ 4124 link_key_type_t link_key_type; 4125 link_key_t link_key; 4126 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4127 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4128 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4129 return; 4130 } 4131 } 4132 } 4133 #endif 4134 4135 // start to authenticate connection 4136 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4137 hci_run(); 4138 } 4139 4140 /** 4141 * @brief start dedicated bonding with device. disconnect after bonding 4142 * @param device 4143 * @param request MITM protection 4144 * @result GAP_DEDICATED_BONDING_COMPLETE 4145 */ 4146 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4147 4148 // create connection state machine 4149 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 4150 4151 if (!connection){ 4152 return BTSTACK_MEMORY_ALLOC_FAILED; 4153 } 4154 4155 // delete linkn key 4156 gap_drop_link_key_for_bd_addr(device); 4157 4158 // configure LEVEL_2/3, dedicated bonding 4159 connection->state = SEND_CREATE_CONNECTION; 4160 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4161 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4162 connection->bonding_flags = BONDING_DEDICATED; 4163 4164 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4165 4166 // handle: connnection failure (connection complete != ok) 4167 // handle: authentication failure 4168 // handle: disconnect on done 4169 4170 hci_run(); 4171 4172 return 0; 4173 } 4174 #endif 4175 4176 void gap_set_local_name(const char * local_name){ 4177 hci_stack->local_name = local_name; 4178 } 4179 4180 4181 #ifdef ENABLE_BLE 4182 4183 #ifdef ENABLE_LE_CENTRAL 4184 void gap_start_scan(void){ 4185 hci_stack->le_scanning_enabled = 1; 4186 hci_run(); 4187 } 4188 4189 void gap_stop_scan(void){ 4190 hci_stack->le_scanning_enabled = 0; 4191 hci_run(); 4192 } 4193 4194 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4195 hci_stack->le_scan_type = scan_type; 4196 hci_stack->le_scan_interval = scan_interval; 4197 hci_stack->le_scan_window = scan_window; 4198 hci_run(); 4199 } 4200 4201 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4202 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4203 if (!conn){ 4204 log_info("gap_connect: no connection exists yet, creating context"); 4205 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4206 if (!conn){ 4207 // notify client that alloc failed 4208 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4209 log_info("gap_connect: failed to alloc hci_connection_t"); 4210 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4211 } 4212 conn->state = SEND_CREATE_CONNECTION; 4213 log_info("gap_connect: send create connection next"); 4214 hci_run(); 4215 return 0; 4216 } 4217 4218 if (!hci_is_le_connection(conn) || 4219 conn->state == SEND_CREATE_CONNECTION || 4220 conn->state == SENT_CREATE_CONNECTION) { 4221 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4222 log_error("gap_connect: classic connection or connect is already being created"); 4223 return GATT_CLIENT_IN_WRONG_STATE; 4224 } 4225 4226 log_info("gap_connect: context exists with state %u", conn->state); 4227 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4228 hci_run(); 4229 return 0; 4230 } 4231 4232 // @assumption: only a single outgoing LE Connection exists 4233 static hci_connection_t * gap_get_outgoing_connection(void){ 4234 btstack_linked_item_t *it; 4235 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4236 hci_connection_t * conn = (hci_connection_t *) it; 4237 if (!hci_is_le_connection(conn)) continue; 4238 switch (conn->state){ 4239 case SEND_CREATE_CONNECTION: 4240 case SENT_CREATE_CONNECTION: 4241 case SENT_CANCEL_CONNECTION: 4242 return conn; 4243 default: 4244 break; 4245 }; 4246 } 4247 return NULL; 4248 } 4249 4250 uint8_t gap_connect_cancel(void){ 4251 hci_connection_t * conn = gap_get_outgoing_connection(); 4252 if (!conn) return 0; 4253 switch (conn->state){ 4254 case SEND_CREATE_CONNECTION: 4255 // skip sending create connection and emit event instead 4256 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4257 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4258 btstack_memory_hci_connection_free( conn ); 4259 break; 4260 case SENT_CREATE_CONNECTION: 4261 // request to send cancel connection 4262 conn->state = SEND_CANCEL_CONNECTION; 4263 hci_run(); 4264 break; 4265 default: 4266 break; 4267 } 4268 return 0; 4269 } 4270 #endif 4271 4272 #ifdef ENABLE_LE_CENTRAL 4273 /** 4274 * @brief Set connection parameters for outgoing connections 4275 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4276 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4277 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4278 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4279 * @param conn_latency, default: 4 4280 * @param supervision_timeout (unit: 10ms), default: 720 ms 4281 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4282 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4283 */ 4284 4285 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4286 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4287 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4288 hci_stack->le_connection_scan_interval = conn_scan_interval; 4289 hci_stack->le_connection_scan_window = conn_scan_window; 4290 hci_stack->le_connection_interval_min = conn_interval_min; 4291 hci_stack->le_connection_interval_max = conn_interval_max; 4292 hci_stack->le_connection_latency = conn_latency; 4293 hci_stack->le_supervision_timeout = supervision_timeout; 4294 hci_stack->le_minimum_ce_length = min_ce_length; 4295 hci_stack->le_maximum_ce_length = max_ce_length; 4296 } 4297 #endif 4298 4299 /** 4300 * @brief Updates the connection parameters for a given LE connection 4301 * @param handle 4302 * @param conn_interval_min (unit: 1.25ms) 4303 * @param conn_interval_max (unit: 1.25ms) 4304 * @param conn_latency 4305 * @param supervision_timeout (unit: 10ms) 4306 * @returns 0 if ok 4307 */ 4308 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4309 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4310 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4311 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4312 connection->le_conn_interval_min = conn_interval_min; 4313 connection->le_conn_interval_max = conn_interval_max; 4314 connection->le_conn_latency = conn_latency; 4315 connection->le_supervision_timeout = supervision_timeout; 4316 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4317 hci_run(); 4318 return 0; 4319 } 4320 4321 /** 4322 * @brief Request an update of the connection parameter for a given LE connection 4323 * @param handle 4324 * @param conn_interval_min (unit: 1.25ms) 4325 * @param conn_interval_max (unit: 1.25ms) 4326 * @param conn_latency 4327 * @param supervision_timeout (unit: 10ms) 4328 * @returns 0 if ok 4329 */ 4330 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4331 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4332 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4333 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4334 connection->le_conn_interval_min = conn_interval_min; 4335 connection->le_conn_interval_max = conn_interval_max; 4336 connection->le_conn_latency = conn_latency; 4337 connection->le_supervision_timeout = supervision_timeout; 4338 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4339 hci_run(); 4340 return 0; 4341 } 4342 4343 #ifdef ENABLE_LE_PERIPHERAL 4344 4345 static void gap_advertisments_changed(void){ 4346 // disable advertisements before updating adv, scan data, or adv params 4347 if (hci_stack->le_advertisements_active){ 4348 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4349 } 4350 hci_run(); 4351 } 4352 4353 /** 4354 * @brief Set Advertisement Data 4355 * @param advertising_data_length 4356 * @param advertising_data (max 31 octets) 4357 * @note data is not copied, pointer has to stay valid 4358 */ 4359 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4360 hci_stack->le_advertisements_data_len = advertising_data_length; 4361 hci_stack->le_advertisements_data = advertising_data; 4362 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4363 gap_advertisments_changed(); 4364 } 4365 4366 /** 4367 * @brief Set Scan Response Data 4368 * @param advertising_data_length 4369 * @param advertising_data (max 31 octets) 4370 * @note data is not copied, pointer has to stay valid 4371 */ 4372 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4373 hci_stack->le_scan_response_data_len = scan_response_data_length; 4374 hci_stack->le_scan_response_data = scan_response_data; 4375 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4376 gap_advertisments_changed(); 4377 } 4378 4379 /** 4380 * @brief Set Advertisement Parameters 4381 * @param adv_int_min 4382 * @param adv_int_max 4383 * @param adv_type 4384 * @param direct_address_type 4385 * @param direct_address 4386 * @param channel_map 4387 * @param filter_policy 4388 * 4389 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4390 */ 4391 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4392 uint8_t direct_address_typ, bd_addr_t direct_address, 4393 uint8_t channel_map, uint8_t filter_policy) { 4394 4395 hci_stack->le_advertisements_interval_min = adv_int_min; 4396 hci_stack->le_advertisements_interval_max = adv_int_max; 4397 hci_stack->le_advertisements_type = adv_type; 4398 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4399 hci_stack->le_advertisements_channel_map = channel_map; 4400 hci_stack->le_advertisements_filter_policy = filter_policy; 4401 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4402 4403 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4404 gap_advertisments_changed(); 4405 } 4406 4407 /** 4408 * @brief Enable/Disable Advertisements 4409 * @param enabled 4410 */ 4411 void gap_advertisements_enable(int enabled){ 4412 hci_stack->le_advertisements_enabled = enabled; 4413 if (enabled && !hci_stack->le_advertisements_active){ 4414 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4415 } 4416 if (!enabled && hci_stack->le_advertisements_active){ 4417 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4418 } 4419 hci_run(); 4420 } 4421 4422 #endif 4423 4424 void hci_le_set_own_address_type(uint8_t own_address_type){ 4425 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4426 if (own_address_type == hci_stack->le_own_addr_type) return; 4427 hci_stack->le_own_addr_type = own_address_type; 4428 4429 #ifdef ENABLE_LE_PERIPHERAL 4430 // update advertisement parameters, too 4431 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4432 gap_advertisments_changed(); 4433 #endif 4434 #ifdef ENABLE_LE_CENTRAL 4435 // note: we don't update scan parameters or modify ongoing connection attempts 4436 #endif 4437 } 4438 4439 #endif 4440 4441 uint8_t gap_disconnect(hci_con_handle_t handle){ 4442 hci_connection_t * conn = hci_connection_for_handle(handle); 4443 if (!conn){ 4444 hci_emit_disconnection_complete(handle, 0); 4445 return 0; 4446 } 4447 // ignore if already disconnected 4448 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4449 return 0; 4450 } 4451 conn->state = SEND_DISCONNECT; 4452 hci_run(); 4453 return 0; 4454 } 4455 4456 /** 4457 * @brief Get connection type 4458 * @param con_handle 4459 * @result connection_type 4460 */ 4461 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4462 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4463 if (!conn) return GAP_CONNECTION_INVALID; 4464 switch (conn->address_type){ 4465 case BD_ADDR_TYPE_LE_PUBLIC: 4466 case BD_ADDR_TYPE_LE_RANDOM: 4467 return GAP_CONNECTION_LE; 4468 case BD_ADDR_TYPE_SCO: 4469 return GAP_CONNECTION_SCO; 4470 case BD_ADDR_TYPE_CLASSIC: 4471 return GAP_CONNECTION_ACL; 4472 default: 4473 return GAP_CONNECTION_INVALID; 4474 } 4475 } 4476 4477 #ifdef ENABLE_BLE 4478 4479 #ifdef ENABLE_LE_CENTRAL 4480 /** 4481 * @brief Auto Connection Establishment - Start Connecting to device 4482 * @param address_typ 4483 * @param address 4484 * @returns 0 if ok 4485 */ 4486 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4487 // check capacity 4488 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4489 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4490 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4491 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4492 entry->address_type = address_type; 4493 memcpy(entry->address, address, 6); 4494 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4495 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4496 hci_run(); 4497 return 0; 4498 } 4499 4500 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4501 btstack_linked_list_iterator_t it; 4502 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4503 while (btstack_linked_list_iterator_has_next(&it)){ 4504 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4505 if (entry->address_type != address_type) continue; 4506 if (memcmp(entry->address, address, 6) != 0) continue; 4507 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4508 // remove from controller if already present 4509 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4510 continue; 4511 } 4512 // direclty remove entry from whitelist 4513 btstack_linked_list_iterator_remove(&it); 4514 btstack_memory_whitelist_entry_free(entry); 4515 } 4516 } 4517 4518 /** 4519 * @brief Auto Connection Establishment - Stop Connecting to device 4520 * @param address_typ 4521 * @param address 4522 * @returns 0 if ok 4523 */ 4524 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4525 hci_remove_from_whitelist(address_type, address); 4526 hci_run(); 4527 return 0; 4528 } 4529 4530 /** 4531 * @brief Auto Connection Establishment - Stop everything 4532 * @note Convenience function to stop all active auto connection attempts 4533 */ 4534 void gap_auto_connection_stop_all(void){ 4535 btstack_linked_list_iterator_t it; 4536 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4537 while (btstack_linked_list_iterator_has_next(&it)){ 4538 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4539 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4540 // remove from controller if already present 4541 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4542 continue; 4543 } 4544 // directly remove entry from whitelist 4545 btstack_linked_list_iterator_remove(&it); 4546 btstack_memory_whitelist_entry_free(entry); 4547 } 4548 hci_run(); 4549 } 4550 #endif 4551 #endif 4552 4553 #ifdef ENABLE_CLASSIC 4554 /** 4555 * @brief Set Extended Inquiry Response data 4556 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4557 * @note has to be done before stack starts up 4558 */ 4559 void gap_set_extended_inquiry_response(const uint8_t * data){ 4560 hci_stack->eir_data = data; 4561 } 4562 4563 /** 4564 * @brief Start GAP Classic Inquiry 4565 * @param duration in 1.28s units 4566 * @return 0 if ok 4567 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4568 */ 4569 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4570 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4571 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4572 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4573 } 4574 hci_stack->inquiry_state = duration_in_1280ms_units; 4575 hci_run(); 4576 return 0; 4577 } 4578 4579 /** 4580 * @brief Stop GAP Classic Inquiry 4581 * @returns 0 if ok 4582 */ 4583 int gap_inquiry_stop(void){ 4584 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN || hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4585 // emit inquiry complete event, before it even started 4586 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4587 hci_emit_event(event, sizeof(event), 1); 4588 return 0; 4589 } 4590 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4591 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4592 hci_run(); 4593 return 0; 4594 } 4595 4596 4597 /** 4598 * @brief Remote Name Request 4599 * @param addr 4600 * @param page_scan_repetition_mode 4601 * @param clock_offset only used when bit 15 is set 4602 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4603 */ 4604 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4605 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4606 memcpy(hci_stack->remote_name_addr, addr, 6); 4607 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4608 hci_stack->remote_name_clock_offset = clock_offset; 4609 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4610 hci_run(); 4611 return 0; 4612 } 4613 4614 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4615 hci_stack->gap_pairing_state = state; 4616 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4617 hci_run(); 4618 return 0; 4619 } 4620 4621 /** 4622 * @brief Legacy Pairing Pin Code Response 4623 * @param addr 4624 * @param pin 4625 * @return 0 if ok 4626 */ 4627 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4628 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4629 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 4630 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4631 } 4632 4633 /** 4634 * @brief Abort Legacy Pairing 4635 * @param addr 4636 * @param pin 4637 * @return 0 if ok 4638 */ 4639 int gap_pin_code_negative(bd_addr_t addr){ 4640 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4641 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4642 } 4643 4644 /** 4645 * @brief SSP Passkey Response 4646 * @param addr 4647 * @param passkey 4648 * @return 0 if ok 4649 */ 4650 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4651 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4652 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 4653 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4654 } 4655 4656 /** 4657 * @brief Abort SSP Passkey Entry/Pairing 4658 * @param addr 4659 * @param pin 4660 * @return 0 if ok 4661 */ 4662 int gap_ssp_passkey_negative(bd_addr_t addr){ 4663 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4664 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4665 } 4666 4667 /** 4668 * @brief Accept SSP Numeric Comparison 4669 * @param addr 4670 * @param passkey 4671 * @return 0 if ok 4672 */ 4673 int gap_ssp_confirmation_response(bd_addr_t addr){ 4674 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4675 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4676 } 4677 4678 /** 4679 * @brief Abort SSP Numeric Comparison/Pairing 4680 * @param addr 4681 * @param pin 4682 * @return 0 if ok 4683 */ 4684 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4685 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4686 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4687 } 4688 4689 /** 4690 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4691 * @param inquiry_mode see bluetooth_defines.h 4692 */ 4693 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4694 hci_stack->inquiry_mode = mode; 4695 } 4696 4697 /** 4698 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4699 */ 4700 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4701 hci_stack->sco_voice_setting = voice_setting; 4702 } 4703 4704 /** 4705 * @brief Get SCO Voice Setting 4706 * @return current voice setting 4707 */ 4708 uint16_t hci_get_sco_voice_setting(void){ 4709 return hci_stack->sco_voice_setting; 4710 } 4711 4712 /** @brief Get SCO packet length for current SCO Voice setting 4713 * @note Using SCO packets of the exact length is required for USB transfer 4714 * @return Length of SCO packets in bytes (not audio frames) 4715 */ 4716 int hci_get_sco_packet_length(void){ 4717 int sco_packet_length = 0; 4718 4719 #ifdef ENABLE_CLASSIC 4720 #ifdef ENABLE_SCO_OVER_HCI 4721 // see Core Spec for H2 USB Transfer. 4722 4723 // CVSD requires twice as much bytes 4724 int multiplier = hci_stack->sco_voice_setting & 0x0020 ? 2 : 1; 4725 4726 // 3 byte SCO header + 24 bytes per connection 4727 sco_packet_length = 3 + 24 * hci_number_sco_connections() * multiplier; 4728 #endif 4729 #endif 4730 return sco_packet_length; 4731 } 4732 4733 /** 4734 * @brief Sets the master/slave policy 4735 * @param policy (0: attempt to become master, 1: let connecting device decide) 4736 */ 4737 void hci_set_master_slave_policy(uint8_t policy){ 4738 hci_stack->master_slave_policy = policy; 4739 } 4740 4741 #endif 4742 4743 HCI_STATE hci_get_state(void){ 4744 return hci_stack->state; 4745 } 4746 4747 4748 /** 4749 * @brief Set callback for Bluetooth Hardware Error 4750 */ 4751 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4752 hci_stack->hardware_error_callback = fn; 4753 } 4754 4755 void hci_disconnect_all(void){ 4756 btstack_linked_list_iterator_t it; 4757 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4758 while (btstack_linked_list_iterator_has_next(&it)){ 4759 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4760 if (con->state == SENT_DISCONNECT) continue; 4761 con->state = SEND_DISCONNECT; 4762 } 4763 hci_run(); 4764 } 4765 4766 uint16_t hci_get_manufacturer(void){ 4767 return hci_stack->manufacturer; 4768 } 4769 4770 #ifdef ENABLE_BLE 4771 4772 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 4773 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 4774 if (!hci_con) return NULL; 4775 return &hci_con->sm_connection; 4776 } 4777 4778 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 4779 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 4780 4781 int gap_encryption_key_size(hci_con_handle_t con_handle){ 4782 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4783 if (!sm_conn) return 0; // wrong connection 4784 if (!sm_conn->sm_connection_encrypted) return 0; 4785 return sm_conn->sm_actual_encryption_key_size; 4786 } 4787 4788 int gap_authenticated(hci_con_handle_t con_handle){ 4789 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4790 if (!sm_conn) return 0; // wrong connection 4791 if (!sm_conn->sm_connection_encrypted) return 0; // unencrypted connection cannot be authenticated 4792 return sm_conn->sm_connection_authenticated; 4793 } 4794 4795 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 4796 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4797 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 4798 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 4799 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 4800 return sm_conn->sm_connection_authorization_state; 4801 } 4802 #endif 4803