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 event_handler(uint8_t *packet, int size){ 1787 1788 uint16_t event_length = packet[1]; 1789 1790 // assert packet is complete 1791 if (size != event_length + 2){ 1792 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1793 return; 1794 } 1795 1796 bd_addr_t addr; 1797 bd_addr_type_t addr_type; 1798 hci_con_handle_t handle; 1799 hci_connection_t * conn; 1800 int i; 1801 #ifdef ENABLE_CLASSIC 1802 uint8_t link_type; 1803 #endif 1804 1805 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1806 1807 switch (hci_event_packet_get_type(packet)) { 1808 1809 case HCI_EVENT_COMMAND_COMPLETE: 1810 // get num cmd packets - limit to 1 to reduce complexity 1811 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1812 1813 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1814 if (packet[5]) break; 1815 // terminate, name 248 chars 1816 packet[6+248] = 0; 1817 log_info("local name: %s", &packet[6]); 1818 } 1819 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1820 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1821 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1822 uint16_t acl_len = little_endian_read_16(packet, 6); 1823 uint16_t sco_len = packet[8]; 1824 1825 // determine usable ACL/SCO payload size 1826 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1827 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1828 1829 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1830 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1831 1832 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1833 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1834 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1835 } 1836 } 1837 #ifdef ENABLE_BLE 1838 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1839 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1840 hci_stack->le_acl_packets_total_num = packet[8]; 1841 // determine usable ACL payload size 1842 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1843 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1844 } 1845 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1846 } 1847 #endif 1848 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1849 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1850 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1851 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1852 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); 1853 } 1854 #endif 1855 #ifdef ENABLE_LE_CENTRAL 1856 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1857 hci_stack->le_whitelist_capacity = packet[6]; 1858 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1859 } 1860 #endif 1861 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1862 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1863 hci_stack->local_bd_addr); 1864 log_info("Local Address, Status: 0x%02x: Addr: %s", 1865 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1866 #ifdef ENABLE_CLASSIC 1867 if (hci_stack->link_key_db){ 1868 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1869 } 1870 #endif 1871 } 1872 #ifdef ENABLE_CLASSIC 1873 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1874 hci_emit_discoverable_enabled(hci_stack->discoverable); 1875 } 1876 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1877 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1878 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1879 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1880 hci_emit_event(event, sizeof(event), 1); 1881 } 1882 } 1883 #endif 1884 1885 // Note: HCI init checks 1886 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1887 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1888 1889 #ifdef ENABLE_CLASSIC 1890 // determine usable ACL packet types based on host buffer size and supported features 1891 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1892 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1893 #endif 1894 // Classic/LE 1895 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1896 } 1897 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1898 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1899 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1900 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1901 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1902 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1903 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1904 } 1905 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1906 hci_stack->local_supported_commands[0] = 1907 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1908 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1909 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1910 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 1911 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 1912 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2; // bit 5 = Octet 35, bit 3 1913 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1914 } 1915 #ifdef ENABLE_CLASSIC 1916 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1917 if (packet[5] == 0){ 1918 hci_stack->synchronous_flow_control_enabled = 1; 1919 } 1920 } 1921 #endif 1922 break; 1923 1924 case HCI_EVENT_COMMAND_STATUS: 1925 // get num cmd packets - limit to 1 to reduce complexity 1926 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1927 break; 1928 1929 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1930 int offset = 3; 1931 for (i=0; i<packet[2];i++){ 1932 handle = little_endian_read_16(packet, offset) & 0x0fff; 1933 offset += 2; 1934 uint16_t num_packets = little_endian_read_16(packet, offset); 1935 offset += 2; 1936 1937 conn = hci_connection_for_handle(handle); 1938 if (!conn){ 1939 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1940 continue; 1941 } 1942 1943 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1944 #ifdef ENABLE_CLASSIC 1945 if (conn->num_sco_packets_sent >= num_packets){ 1946 conn->num_sco_packets_sent -= num_packets; 1947 } else { 1948 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1949 conn->num_sco_packets_sent = 0; 1950 } 1951 hci_notify_if_sco_can_send_now(); 1952 #endif 1953 } else { 1954 if (conn->num_acl_packets_sent >= num_packets){ 1955 conn->num_acl_packets_sent -= num_packets; 1956 } else { 1957 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1958 conn->num_acl_packets_sent = 0; 1959 } 1960 } 1961 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1962 } 1963 break; 1964 } 1965 1966 #ifdef ENABLE_CLASSIC 1967 case HCI_EVENT_INQUIRY_COMPLETE: 1968 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 1969 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1970 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1971 hci_emit_event(event, sizeof(event), 1); 1972 } 1973 break; 1974 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 1975 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 1976 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 1977 } 1978 break; 1979 case HCI_EVENT_CONNECTION_REQUEST: 1980 reverse_bd_addr(&packet[2], addr); 1981 // TODO: eval COD 8-10 1982 link_type = packet[11]; 1983 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1984 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1985 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1986 if (!conn) { 1987 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1988 } 1989 if (!conn) { 1990 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1991 hci_stack->decline_reason = 0x0d; 1992 bd_addr_copy(hci_stack->decline_addr, addr); 1993 break; 1994 } 1995 conn->role = HCI_ROLE_SLAVE; 1996 conn->state = RECEIVED_CONNECTION_REQUEST; 1997 // store info about eSCO 1998 if (link_type == 0x02){ 1999 conn->remote_supported_feature_eSCO = 1; 2000 } 2001 hci_run(); 2002 break; 2003 2004 case HCI_EVENT_CONNECTION_COMPLETE: 2005 // Connection management 2006 reverse_bd_addr(&packet[5], addr); 2007 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2008 addr_type = BD_ADDR_TYPE_CLASSIC; 2009 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2010 if (conn) { 2011 if (!packet[2]){ 2012 conn->state = OPEN; 2013 conn->con_handle = little_endian_read_16(packet, 3); 2014 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2015 2016 // restart timer 2017 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2018 btstack_run_loop_add_timer(&conn->timeout); 2019 2020 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2021 2022 hci_emit_nr_connections_changed(); 2023 } else { 2024 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2025 uint8_t status = packet[2]; 2026 bd_addr_t bd_address; 2027 memcpy(&bd_address, conn->address, 6); 2028 2029 // connection failed, remove entry 2030 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2031 btstack_memory_hci_connection_free( conn ); 2032 2033 // notify client if dedicated bonding 2034 if (notify_dedicated_bonding_failed){ 2035 log_info("hci notify_dedicated_bonding_failed"); 2036 hci_emit_dedicated_bonding_result(bd_address, status); 2037 } 2038 2039 // if authentication error, also delete link key 2040 if (packet[2] == 0x05) { 2041 gap_drop_link_key_for_bd_addr(addr); 2042 } 2043 } 2044 } 2045 break; 2046 2047 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2048 reverse_bd_addr(&packet[5], addr); 2049 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2050 if (packet[2]){ 2051 // connection failed 2052 break; 2053 } 2054 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2055 if (!conn) { 2056 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2057 } 2058 if (!conn) { 2059 break; 2060 } 2061 conn->state = OPEN; 2062 conn->con_handle = little_endian_read_16(packet, 3); 2063 2064 #ifdef ENABLE_SCO_OVER_HCI 2065 // update SCO 2066 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2067 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2068 } 2069 #endif 2070 break; 2071 2072 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2073 handle = little_endian_read_16(packet, 3); 2074 conn = hci_connection_for_handle(handle); 2075 if (!conn) break; 2076 if (!packet[2]){ 2077 uint8_t * features = &packet[5]; 2078 if (features[6] & (1 << 3)){ 2079 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2080 } 2081 if (features[3] & (1<<7)){ 2082 conn->remote_supported_feature_eSCO = 1; 2083 } 2084 } 2085 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2086 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2087 if (conn->bonding_flags & BONDING_DEDICATED){ 2088 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2089 } 2090 break; 2091 2092 case HCI_EVENT_LINK_KEY_REQUEST: 2093 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2094 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2095 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2096 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2097 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2098 hci_run(); 2099 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2100 return; 2101 2102 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2103 reverse_bd_addr(&packet[2], addr); 2104 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2105 if (!conn) break; 2106 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2107 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2108 // Change Connection Encryption keeps link key type 2109 if (link_key_type != CHANGED_COMBINATION_KEY){ 2110 conn->link_key_type = link_key_type; 2111 } 2112 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2113 // still forward event to allow dismiss of pairing dialog 2114 break; 2115 } 2116 2117 case HCI_EVENT_PIN_CODE_REQUEST: 2118 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2119 // non-bondable mode: pin code negative reply will be sent 2120 if (!hci_stack->bondable){ 2121 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2122 hci_run(); 2123 return; 2124 } 2125 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2126 if (!hci_stack->link_key_db) break; 2127 hci_event_pin_code_request_get_bd_addr(packet, addr); 2128 hci_stack->link_key_db->delete_link_key(addr); 2129 break; 2130 2131 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2132 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2133 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2134 break; 2135 2136 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2137 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2138 if (!hci_stack->ssp_auto_accept) break; 2139 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2140 break; 2141 2142 case HCI_EVENT_USER_PASSKEY_REQUEST: 2143 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2144 if (!hci_stack->ssp_auto_accept) break; 2145 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2146 break; 2147 #endif 2148 2149 case HCI_EVENT_ENCRYPTION_CHANGE: 2150 handle = little_endian_read_16(packet, 3); 2151 conn = hci_connection_for_handle(handle); 2152 if (!conn) break; 2153 if (packet[2] == 0) { 2154 if (packet[5]){ 2155 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2156 } else { 2157 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2158 } 2159 } 2160 #ifdef ENABLE_CLASSIC 2161 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2162 #endif 2163 break; 2164 2165 #ifdef ENABLE_CLASSIC 2166 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2167 handle = little_endian_read_16(packet, 3); 2168 conn = hci_connection_for_handle(handle); 2169 if (!conn) break; 2170 2171 // dedicated bonding: send result and disconnect 2172 if (conn->bonding_flags & BONDING_DEDICATED){ 2173 conn->bonding_flags &= ~BONDING_DEDICATED; 2174 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2175 conn->bonding_status = packet[2]; 2176 break; 2177 } 2178 2179 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2180 // link key sufficient for requested security 2181 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2182 break; 2183 } 2184 // not enough 2185 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2186 break; 2187 #endif 2188 2189 // HCI_EVENT_DISCONNECTION_COMPLETE 2190 // has been split, to first notify stack before shutting connection down 2191 // see end of function, too. 2192 case HCI_EVENT_DISCONNECTION_COMPLETE: 2193 if (packet[2]) break; // status != 0 2194 handle = little_endian_read_16(packet, 3); 2195 // drop outgoing ACL fragments if it is for closed connection 2196 if (hci_stack->acl_fragmentation_total_size > 0) { 2197 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2198 log_info("hci: drop fragmented ACL data for closed connection"); 2199 hci_stack->acl_fragmentation_total_size = 0; 2200 hci_stack->acl_fragmentation_pos = 0; 2201 } 2202 } 2203 2204 // re-enable advertisements for le connections if active 2205 conn = hci_connection_for_handle(handle); 2206 if (!conn) break; 2207 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2208 #ifdef ENABLE_BLE 2209 #ifdef ENABLE_LE_PERIPHERAL 2210 if (hci_is_le_connection(conn)){ 2211 hci_reenable_advertisements_if_needed(); 2212 } 2213 #endif 2214 #endif 2215 break; 2216 2217 case HCI_EVENT_HARDWARE_ERROR: 2218 log_error("Hardware Error: 0x%02x", packet[2]); 2219 if (hci_stack->hardware_error_callback){ 2220 (*hci_stack->hardware_error_callback)(packet[2]); 2221 } else { 2222 // if no special requests, just reboot stack 2223 hci_power_control_off(); 2224 hci_power_control_on(); 2225 } 2226 break; 2227 2228 #ifdef ENABLE_CLASSIC 2229 case HCI_EVENT_ROLE_CHANGE: 2230 if (packet[2]) break; // status != 0 2231 reverse_bd_addr(&packet[3], addr); 2232 addr_type = BD_ADDR_TYPE_CLASSIC; 2233 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2234 if (!conn) break; 2235 conn->role = packet[9]; 2236 break; 2237 #endif 2238 2239 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2240 // release packet buffer only for asynchronous transport and if there are not further fragements 2241 if (hci_transport_synchronous()) { 2242 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2243 return; // instead of break: to avoid re-entering hci_run() 2244 } 2245 if (hci_stack->acl_fragmentation_total_size) break; 2246 hci_release_packet_buffer(); 2247 2248 // L2CAP receives this event via the hci_emit_event below 2249 2250 #ifdef ENABLE_CLASSIC 2251 // For SCO, we do the can_send_now_check here 2252 hci_notify_if_sco_can_send_now(); 2253 #endif 2254 break; 2255 2256 #ifdef ENABLE_CLASSIC 2257 case HCI_EVENT_SCO_CAN_SEND_NOW: 2258 // For SCO, we do the can_send_now_check here 2259 hci_notify_if_sco_can_send_now(); 2260 return; 2261 2262 // explode inquriy results for easier consumption 2263 case HCI_EVENT_INQUIRY_RESULT: 2264 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2265 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2266 gap_inquiry_explode(packet); 2267 break; 2268 #endif 2269 2270 #ifdef ENABLE_BLE 2271 case HCI_EVENT_LE_META: 2272 switch (packet[2]){ 2273 #ifdef ENABLE_LE_CENTRAL 2274 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2275 // log_info("advertising report received"); 2276 if (!hci_stack->le_scanning_enabled) break; 2277 le_handle_advertisement_report(packet, size); 2278 break; 2279 #endif 2280 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2281 // Connection management 2282 reverse_bd_addr(&packet[8], addr); 2283 addr_type = (bd_addr_type_t)packet[7]; 2284 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2285 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2286 2287 #ifdef ENABLE_LE_CENTRAL 2288 // if auto-connect, remove from whitelist in both roles 2289 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2290 hci_remove_from_whitelist(addr_type, addr); 2291 } 2292 // handle error: error is reported only to the initiator -> outgoing connection 2293 if (packet[3]){ 2294 2295 // handle cancelled outgoing connection 2296 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2297 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2298 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2299 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2300 conn = gap_get_outgoing_connection(); 2301 } 2302 2303 // outgoing connection establishment is done 2304 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2305 // remove entry 2306 if (conn){ 2307 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2308 btstack_memory_hci_connection_free( conn ); 2309 } 2310 break; 2311 } 2312 #endif 2313 // on success, both hosts receive connection complete event 2314 if (packet[6] == HCI_ROLE_MASTER){ 2315 #ifdef ENABLE_LE_CENTRAL 2316 // if we're master, it was an outgoing connection and we're done with it 2317 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2318 #endif 2319 } else { 2320 #ifdef ENABLE_LE_PERIPHERAL 2321 // if we're slave, it was an incoming connection, advertisements have stopped 2322 hci_stack->le_advertisements_active = 0; 2323 #endif 2324 } 2325 // LE connections are auto-accepted, so just create a connection if there isn't one already 2326 if (!conn){ 2327 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2328 } 2329 // no memory, sorry. 2330 if (!conn){ 2331 break; 2332 } 2333 2334 conn->state = OPEN; 2335 conn->role = packet[6]; 2336 conn->con_handle = little_endian_read_16(packet, 4); 2337 2338 #ifdef ENABLE_LE_PERIPHERAL 2339 if (packet[6] == HCI_ROLE_SLAVE){ 2340 hci_reenable_advertisements_if_needed(); 2341 } 2342 #endif 2343 2344 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2345 2346 // restart timer 2347 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2348 // btstack_run_loop_add_timer(&conn->timeout); 2349 2350 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2351 2352 hci_emit_nr_connections_changed(); 2353 break; 2354 2355 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2356 2357 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2358 // connection 2359 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2360 conn = hci_connection_for_handle(handle); 2361 if (conn) { 2362 // read arguments 2363 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2364 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2365 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2366 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2367 2368 // validate against current connection parameter range 2369 le_connection_parameter_range_t existing_range; 2370 gap_get_connection_parameter_range(&existing_range); 2371 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2372 if (update_parameter){ 2373 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2374 conn->le_conn_interval_min = le_conn_interval_min; 2375 conn->le_conn_interval_max = le_conn_interval_max; 2376 conn->le_conn_latency = le_conn_latency; 2377 conn->le_supervision_timeout = le_supervision_timeout; 2378 } else { 2379 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2380 } 2381 } 2382 break; 2383 default: 2384 break; 2385 } 2386 break; 2387 #endif 2388 case HCI_EVENT_VENDOR_SPECIFIC: 2389 // Vendor specific commands often create vendor specific event instead of num completed packets 2390 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2391 switch (hci_stack->manufacturer){ 2392 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2393 hci_stack->num_cmd_packets = 1; 2394 break; 2395 default: 2396 break; 2397 } 2398 break; 2399 default: 2400 break; 2401 } 2402 2403 // handle BT initialization 2404 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2405 hci_initializing_event_handler(packet, size); 2406 } 2407 2408 // help with BT sleep 2409 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2410 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2411 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2412 hci_initializing_next_state(); 2413 } 2414 2415 // notify upper stack 2416 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2417 2418 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2419 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2420 if (!packet[2]){ 2421 handle = little_endian_read_16(packet, 3); 2422 hci_connection_t * aConn = hci_connection_for_handle(handle); 2423 if (aConn) { 2424 uint8_t status = aConn->bonding_status; 2425 uint16_t flags = aConn->bonding_flags; 2426 bd_addr_t bd_address; 2427 memcpy(&bd_address, aConn->address, 6); 2428 hci_shutdown_connection(aConn); 2429 // connection struct is gone, don't access anymore 2430 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2431 hci_emit_dedicated_bonding_result(bd_address, status); 2432 } 2433 } 2434 } 2435 } 2436 2437 // execute main loop 2438 hci_run(); 2439 } 2440 2441 #ifdef ENABLE_CLASSIC 2442 static void sco_handler(uint8_t * packet, uint16_t size){ 2443 if (!hci_stack->sco_packet_handler) return; 2444 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2445 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2446 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2447 hci_connection_t *conn = hci_connection_for_handle(con_handle); 2448 if (conn){ 2449 conn->num_packets_completed++; 2450 hci_stack->host_completed_packets = 1; 2451 hci_run(); 2452 } 2453 #endif 2454 } 2455 #endif 2456 2457 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2458 hci_dump_packet(packet_type, 1, packet, size); 2459 switch (packet_type) { 2460 case HCI_EVENT_PACKET: 2461 event_handler(packet, size); 2462 break; 2463 case HCI_ACL_DATA_PACKET: 2464 acl_handler(packet, size); 2465 break; 2466 #ifdef ENABLE_CLASSIC 2467 case HCI_SCO_DATA_PACKET: 2468 sco_handler(packet, size); 2469 break; 2470 #endif 2471 default: 2472 break; 2473 } 2474 } 2475 2476 /** 2477 * @brief Add event packet handler. 2478 */ 2479 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2480 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2481 } 2482 2483 2484 /** Register HCI packet handlers */ 2485 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2486 hci_stack->acl_packet_handler = handler; 2487 } 2488 2489 #ifdef ENABLE_CLASSIC 2490 /** 2491 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2492 */ 2493 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2494 hci_stack->sco_packet_handler = handler; 2495 } 2496 #endif 2497 2498 static void hci_state_reset(void){ 2499 // no connections yet 2500 hci_stack->connections = NULL; 2501 2502 // keep discoverable/connectable as this has been requested by the client(s) 2503 // hci_stack->discoverable = 0; 2504 // hci_stack->connectable = 0; 2505 // hci_stack->bondable = 1; 2506 // hci_stack->own_addr_type = 0; 2507 2508 // buffer is free 2509 hci_stack->hci_packet_buffer_reserved = 0; 2510 2511 // no pending cmds 2512 hci_stack->decline_reason = 0; 2513 hci_stack->new_scan_enable_value = 0xff; 2514 2515 // LE 2516 #ifdef ENABLE_BLE 2517 memset(hci_stack->le_random_address, 0, 6); 2518 hci_stack->le_random_address_set = 0; 2519 #endif 2520 #ifdef ENABLE_LE_CENTRAL 2521 hci_stack->le_scanning_active = 0; 2522 hci_stack->le_scan_type = 0xff; 2523 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2524 hci_stack->le_whitelist = 0; 2525 hci_stack->le_whitelist_capacity = 0; 2526 #endif 2527 } 2528 2529 #ifdef ENABLE_CLASSIC 2530 /** 2531 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2532 */ 2533 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2534 // store and open remote device db 2535 hci_stack->link_key_db = link_key_db; 2536 if (hci_stack->link_key_db) { 2537 hci_stack->link_key_db->open(); 2538 } 2539 } 2540 #endif 2541 2542 void hci_init(const hci_transport_t *transport, const void *config){ 2543 2544 #ifdef HAVE_MALLOC 2545 if (!hci_stack) { 2546 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2547 } 2548 #else 2549 hci_stack = &hci_stack_static; 2550 #endif 2551 memset(hci_stack, 0, sizeof(hci_stack_t)); 2552 2553 // reference to use transport layer implementation 2554 hci_stack->hci_transport = transport; 2555 2556 // reference to used config 2557 hci_stack->config = config; 2558 2559 // setup pointer for outgoing packet buffer 2560 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2561 2562 // max acl payload size defined in config.h 2563 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2564 2565 // register packet handlers with transport 2566 transport->register_packet_handler(&packet_handler); 2567 2568 hci_stack->state = HCI_STATE_OFF; 2569 2570 // class of device 2571 hci_stack->class_of_device = 0x007a020c; // Smartphone 2572 2573 // bondable by default 2574 hci_stack->bondable = 1; 2575 2576 #ifdef ENABLE_CLASSIC 2577 // classic name 2578 hci_stack->local_name = default_classic_name; 2579 2580 // Master slave policy 2581 hci_stack->master_slave_policy = 1; 2582 #endif 2583 2584 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2585 hci_stack->ssp_enable = 1; 2586 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2587 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2588 hci_stack->ssp_auto_accept = 1; 2589 2590 // voice setting - signed 16 bit pcm data with CVSD over the air 2591 hci_stack->sco_voice_setting = 0x60; 2592 2593 #ifdef ENABLE_LE_CENTRAL 2594 // connection parameter to use for outgoing connections 2595 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2596 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2597 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2598 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2599 hci_stack->le_connection_latency = 4; // 4 2600 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2601 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2602 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2603 #endif 2604 2605 #ifdef ENABLE_LE_PERIPHERAL 2606 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2607 #endif 2608 2609 // connection parameter range used to answer connection parameter update requests in l2cap 2610 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2611 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2612 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2613 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2614 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2615 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2616 2617 hci_state_reset(); 2618 } 2619 2620 /** 2621 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2622 */ 2623 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2624 hci_stack->chipset = chipset_driver; 2625 2626 // reset chipset driver - init is also called on power_up 2627 if (hci_stack->chipset && hci_stack->chipset->init){ 2628 hci_stack->chipset->init(hci_stack->config); 2629 } 2630 } 2631 2632 /** 2633 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2634 */ 2635 void hci_set_control(const btstack_control_t *hardware_control){ 2636 // references to used control implementation 2637 hci_stack->control = hardware_control; 2638 // init with transport config 2639 hardware_control->init(hci_stack->config); 2640 } 2641 2642 void hci_close(void){ 2643 // close remote device db 2644 if (hci_stack->link_key_db) { 2645 hci_stack->link_key_db->close(); 2646 } 2647 2648 btstack_linked_list_iterator_t lit; 2649 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2650 while (btstack_linked_list_iterator_has_next(&lit)){ 2651 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2652 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2653 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2654 hci_shutdown_connection(connection); 2655 } 2656 2657 hci_power_control(HCI_POWER_OFF); 2658 2659 #ifdef HAVE_MALLOC 2660 free(hci_stack); 2661 #endif 2662 hci_stack = NULL; 2663 } 2664 2665 #ifdef ENABLE_CLASSIC 2666 void gap_set_class_of_device(uint32_t class_of_device){ 2667 hci_stack->class_of_device = class_of_device; 2668 } 2669 2670 void hci_disable_l2cap_timeout_check(void){ 2671 disable_l2cap_timeouts = 1; 2672 } 2673 #endif 2674 2675 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2676 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2677 void hci_set_bd_addr(bd_addr_t addr){ 2678 memcpy(hci_stack->custom_bd_addr, addr, 6); 2679 hci_stack->custom_bd_addr_set = 1; 2680 } 2681 #endif 2682 2683 // State-Module-Driver overview 2684 // state module low-level 2685 // HCI_STATE_OFF off close 2686 // HCI_STATE_INITIALIZING, on open 2687 // HCI_STATE_WORKING, on open 2688 // HCI_STATE_HALTING, on open 2689 // HCI_STATE_SLEEPING, off/sleep close 2690 // HCI_STATE_FALLING_ASLEEP on open 2691 2692 static int hci_power_control_on(void){ 2693 2694 // power on 2695 int err = 0; 2696 if (hci_stack->control && hci_stack->control->on){ 2697 err = (*hci_stack->control->on)(); 2698 } 2699 if (err){ 2700 log_error( "POWER_ON failed"); 2701 hci_emit_hci_open_failed(); 2702 return err; 2703 } 2704 2705 // int chipset driver 2706 if (hci_stack->chipset && hci_stack->chipset->init){ 2707 hci_stack->chipset->init(hci_stack->config); 2708 } 2709 2710 // init transport 2711 if (hci_stack->hci_transport->init){ 2712 hci_stack->hci_transport->init(hci_stack->config); 2713 } 2714 2715 // open transport 2716 err = hci_stack->hci_transport->open(); 2717 if (err){ 2718 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2719 if (hci_stack->control && hci_stack->control->off){ 2720 (*hci_stack->control->off)(); 2721 } 2722 hci_emit_hci_open_failed(); 2723 return err; 2724 } 2725 return 0; 2726 } 2727 2728 static void hci_power_control_off(void){ 2729 2730 log_info("hci_power_control_off"); 2731 2732 // close low-level device 2733 hci_stack->hci_transport->close(); 2734 2735 log_info("hci_power_control_off - hci_transport closed"); 2736 2737 // power off 2738 if (hci_stack->control && hci_stack->control->off){ 2739 (*hci_stack->control->off)(); 2740 } 2741 2742 log_info("hci_power_control_off - control closed"); 2743 2744 hci_stack->state = HCI_STATE_OFF; 2745 } 2746 2747 static void hci_power_control_sleep(void){ 2748 2749 log_info("hci_power_control_sleep"); 2750 2751 #if 0 2752 // don't close serial port during sleep 2753 2754 // close low-level device 2755 hci_stack->hci_transport->close(hci_stack->config); 2756 #endif 2757 2758 // sleep mode 2759 if (hci_stack->control && hci_stack->control->sleep){ 2760 (*hci_stack->control->sleep)(); 2761 } 2762 2763 hci_stack->state = HCI_STATE_SLEEPING; 2764 } 2765 2766 static int hci_power_control_wake(void){ 2767 2768 log_info("hci_power_control_wake"); 2769 2770 // wake on 2771 if (hci_stack->control && hci_stack->control->wake){ 2772 (*hci_stack->control->wake)(); 2773 } 2774 2775 #if 0 2776 // open low-level device 2777 int err = hci_stack->hci_transport->open(hci_stack->config); 2778 if (err){ 2779 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2780 if (hci_stack->control && hci_stack->control->off){ 2781 (*hci_stack->control->off)(); 2782 } 2783 hci_emit_hci_open_failed(); 2784 return err; 2785 } 2786 #endif 2787 2788 return 0; 2789 } 2790 2791 static void hci_power_transition_to_initializing(void){ 2792 // set up state machine 2793 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2794 hci_stack->hci_packet_buffer_reserved = 0; 2795 hci_stack->state = HCI_STATE_INITIALIZING; 2796 hci_stack->substate = HCI_INIT_SEND_RESET; 2797 } 2798 2799 int hci_power_control(HCI_POWER_MODE power_mode){ 2800 2801 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2802 2803 int err = 0; 2804 switch (hci_stack->state){ 2805 2806 case HCI_STATE_OFF: 2807 switch (power_mode){ 2808 case HCI_POWER_ON: 2809 err = hci_power_control_on(); 2810 if (err) { 2811 log_error("hci_power_control_on() error %d", err); 2812 return err; 2813 } 2814 hci_power_transition_to_initializing(); 2815 break; 2816 case HCI_POWER_OFF: 2817 // do nothing 2818 break; 2819 case HCI_POWER_SLEEP: 2820 // do nothing (with SLEEP == OFF) 2821 break; 2822 } 2823 break; 2824 2825 case HCI_STATE_INITIALIZING: 2826 switch (power_mode){ 2827 case HCI_POWER_ON: 2828 // do nothing 2829 break; 2830 case HCI_POWER_OFF: 2831 // no connections yet, just turn it off 2832 hci_power_control_off(); 2833 break; 2834 case HCI_POWER_SLEEP: 2835 // no connections yet, just turn it off 2836 hci_power_control_sleep(); 2837 break; 2838 } 2839 break; 2840 2841 case HCI_STATE_WORKING: 2842 switch (power_mode){ 2843 case HCI_POWER_ON: 2844 // do nothing 2845 break; 2846 case HCI_POWER_OFF: 2847 // see hci_run 2848 hci_stack->state = HCI_STATE_HALTING; 2849 break; 2850 case HCI_POWER_SLEEP: 2851 // see hci_run 2852 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2853 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2854 break; 2855 } 2856 break; 2857 2858 case HCI_STATE_HALTING: 2859 switch (power_mode){ 2860 case HCI_POWER_ON: 2861 hci_power_transition_to_initializing(); 2862 break; 2863 case HCI_POWER_OFF: 2864 // do nothing 2865 break; 2866 case HCI_POWER_SLEEP: 2867 // see hci_run 2868 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2869 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2870 break; 2871 } 2872 break; 2873 2874 case HCI_STATE_FALLING_ASLEEP: 2875 switch (power_mode){ 2876 case HCI_POWER_ON: 2877 2878 #ifdef HAVE_PLATFORM_IPHONE_OS 2879 // nothing to do, if H4 supports power management 2880 if (btstack_control_iphone_power_management_enabled()){ 2881 hci_stack->state = HCI_STATE_INITIALIZING; 2882 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2883 break; 2884 } 2885 #endif 2886 hci_power_transition_to_initializing(); 2887 break; 2888 case HCI_POWER_OFF: 2889 // see hci_run 2890 hci_stack->state = HCI_STATE_HALTING; 2891 break; 2892 case HCI_POWER_SLEEP: 2893 // do nothing 2894 break; 2895 } 2896 break; 2897 2898 case HCI_STATE_SLEEPING: 2899 switch (power_mode){ 2900 case HCI_POWER_ON: 2901 2902 #ifdef HAVE_PLATFORM_IPHONE_OS 2903 // nothing to do, if H4 supports power management 2904 if (btstack_control_iphone_power_management_enabled()){ 2905 hci_stack->state = HCI_STATE_INITIALIZING; 2906 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2907 hci_update_scan_enable(); 2908 break; 2909 } 2910 #endif 2911 err = hci_power_control_wake(); 2912 if (err) return err; 2913 hci_power_transition_to_initializing(); 2914 break; 2915 case HCI_POWER_OFF: 2916 hci_stack->state = HCI_STATE_HALTING; 2917 break; 2918 case HCI_POWER_SLEEP: 2919 // do nothing 2920 break; 2921 } 2922 break; 2923 } 2924 2925 // create internal event 2926 hci_emit_state(); 2927 2928 // trigger next/first action 2929 hci_run(); 2930 2931 return 0; 2932 } 2933 2934 2935 #ifdef ENABLE_CLASSIC 2936 2937 static void hci_update_scan_enable(void){ 2938 // 2 = page scan, 1 = inq scan 2939 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2940 hci_run(); 2941 } 2942 2943 void gap_discoverable_control(uint8_t enable){ 2944 if (enable) enable = 1; // normalize argument 2945 2946 if (hci_stack->discoverable == enable){ 2947 hci_emit_discoverable_enabled(hci_stack->discoverable); 2948 return; 2949 } 2950 2951 hci_stack->discoverable = enable; 2952 hci_update_scan_enable(); 2953 } 2954 2955 void gap_connectable_control(uint8_t enable){ 2956 if (enable) enable = 1; // normalize argument 2957 2958 // don't emit event 2959 if (hci_stack->connectable == enable) return; 2960 2961 hci_stack->connectable = enable; 2962 hci_update_scan_enable(); 2963 } 2964 #endif 2965 2966 void gap_local_bd_addr(bd_addr_t address_buffer){ 2967 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2968 } 2969 2970 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2971 static void hci_host_num_completed_packets(void){ 2972 2973 // create packet manually as arrays are not supported and num_commands should not get reduced 2974 hci_reserve_packet_buffer(); 2975 uint8_t * packet = hci_get_outgoing_packet_buffer(); 2976 2977 uint16_t size = 0; 2978 uint16_t num_handles = 0; 2979 packet[size++] = 0x35; 2980 packet[size++] = 0x0c; 2981 size++; // skip param len 2982 size++; // skip num handles 2983 2984 // add { handle, packets } entries 2985 btstack_linked_item_t * it; 2986 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2987 hci_connection_t * connection = (hci_connection_t *) it; 2988 if (connection->num_packets_completed){ 2989 little_endian_store_16(packet, size, connection->con_handle); 2990 size += 2; 2991 little_endian_store_16(packet, size, connection->num_packets_completed); 2992 size += 2; 2993 // 2994 num_handles++; 2995 connection->num_packets_completed = 0; 2996 } 2997 } 2998 2999 packet[2] = size - 3; 3000 packet[3] = num_handles; 3001 3002 hci_stack->host_completed_packets = 0; 3003 3004 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3005 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3006 3007 // release packet buffer for synchronous transport implementations 3008 if (hci_transport_synchronous()){ 3009 hci_release_packet_buffer(); 3010 hci_emit_transport_packet_sent(); 3011 } 3012 } 3013 #endif 3014 3015 static void hci_run(void){ 3016 3017 // log_info("hci_run: entered"); 3018 btstack_linked_item_t * it; 3019 3020 // send continuation fragments first, as they block the prepared packet buffer 3021 if (hci_stack->acl_fragmentation_total_size > 0) { 3022 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3023 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3024 if (connection) { 3025 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3026 hci_send_acl_packet_fragments(connection); 3027 return; 3028 } 3029 } else { 3030 // connection gone -> discard further fragments 3031 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3032 hci_stack->acl_fragmentation_total_size = 0; 3033 hci_stack->acl_fragmentation_pos = 0; 3034 } 3035 } 3036 3037 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3038 // send host num completed packets next as they don't require num_cmd_packets > 0 3039 if (!hci_can_send_comand_packet_transport()) return; 3040 if (hci_stack->host_completed_packets){ 3041 hci_host_num_completed_packets(); 3042 return; 3043 } 3044 #endif 3045 3046 if (!hci_can_send_command_packet_now()) return; 3047 3048 // global/non-connection oriented commands 3049 3050 #ifdef ENABLE_CLASSIC 3051 // decline incoming connections 3052 if (hci_stack->decline_reason){ 3053 uint8_t reason = hci_stack->decline_reason; 3054 hci_stack->decline_reason = 0; 3055 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3056 return; 3057 } 3058 // send scan enable 3059 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 3060 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3061 hci_stack->new_scan_enable_value = 0xff; 3062 return; 3063 } 3064 // start/stop inquiry 3065 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 3066 uint8_t duration = hci_stack->inquiry_state; 3067 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3068 hci_send_cmd(&hci_inquiry, HCI_INQUIRY_LAP, duration, 0); 3069 return; 3070 } 3071 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3072 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3073 hci_send_cmd(&hci_inquiry_cancel); 3074 return; 3075 } 3076 // remote name request 3077 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3078 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3079 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3080 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3081 return; 3082 } 3083 // pairing 3084 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3085 uint8_t state = hci_stack->gap_pairing_state; 3086 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3087 switch (state){ 3088 case GAP_PAIRING_STATE_SEND_PIN: 3089 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); 3090 break; 3091 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3092 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3093 break; 3094 case GAP_PAIRING_STATE_SEND_PASSKEY: 3095 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3096 break; 3097 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3098 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3099 break; 3100 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3101 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3102 break; 3103 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3104 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3105 break; 3106 default: 3107 break; 3108 } 3109 return; 3110 } 3111 #endif 3112 3113 #ifdef ENABLE_BLE 3114 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 3115 if ((hci_stack->state == HCI_STATE_WORKING) 3116 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 3117 3118 #ifdef ENABLE_LE_CENTRAL 3119 // handle le scan 3120 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3121 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3122 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3123 return; 3124 } 3125 if (hci_stack->le_scan_type != 0xff){ 3126 // defaults: active scanning, accept all advertisement packets 3127 int scan_type = hci_stack->le_scan_type; 3128 hci_stack->le_scan_type = 0xff; 3129 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); 3130 return; 3131 } 3132 #endif 3133 #ifdef ENABLE_LE_PERIPHERAL 3134 // le advertisement control 3135 if (hci_stack->le_advertisements_todo){ 3136 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3137 } 3138 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3139 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3140 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3141 return; 3142 } 3143 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3144 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3145 hci_send_cmd(&hci_le_set_advertising_parameters, 3146 hci_stack->le_advertisements_interval_min, 3147 hci_stack->le_advertisements_interval_max, 3148 hci_stack->le_advertisements_type, 3149 hci_stack->le_own_addr_type, 3150 hci_stack->le_advertisements_direct_address_type, 3151 hci_stack->le_advertisements_direct_address, 3152 hci_stack->le_advertisements_channel_map, 3153 hci_stack->le_advertisements_filter_policy); 3154 return; 3155 } 3156 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3157 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3158 uint8_t adv_data_clean[31]; 3159 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3160 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3161 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3162 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3163 return; 3164 } 3165 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3166 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3167 uint8_t scan_data_clean[31]; 3168 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3169 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3170 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3171 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, hci_stack->le_scan_response_data); 3172 return; 3173 } 3174 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3175 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3176 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3177 return; 3178 } 3179 #endif 3180 3181 #ifdef ENABLE_LE_CENTRAL 3182 // 3183 // LE Whitelist Management 3184 // 3185 3186 // check if whitelist needs modification 3187 btstack_linked_list_iterator_t lit; 3188 int modification_pending = 0; 3189 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3190 while (btstack_linked_list_iterator_has_next(&lit)){ 3191 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3192 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3193 modification_pending = 1; 3194 break; 3195 } 3196 } 3197 3198 if (modification_pending){ 3199 // stop connnecting if modification pending 3200 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3201 hci_send_cmd(&hci_le_create_connection_cancel); 3202 return; 3203 } 3204 3205 // add/remove entries 3206 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3207 while (btstack_linked_list_iterator_has_next(&lit)){ 3208 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3209 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3210 entry->state = LE_WHITELIST_ON_CONTROLLER; 3211 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3212 return; 3213 3214 } 3215 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3216 bd_addr_t address; 3217 bd_addr_type_t address_type = entry->address_type; 3218 memcpy(address, entry->address, 6); 3219 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3220 btstack_memory_whitelist_entry_free(entry); 3221 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3222 return; 3223 } 3224 } 3225 } 3226 3227 // start connecting 3228 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3229 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3230 bd_addr_t null_addr; 3231 memset(null_addr, 0, 6); 3232 hci_send_cmd(&hci_le_create_connection, 3233 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3234 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3235 1, // use whitelist 3236 0, // peer address type 3237 null_addr, // peer bd addr 3238 hci_stack->le_own_addr_type, // our addr type: 3239 hci_stack->le_connection_interval_min, // conn interval min 3240 hci_stack->le_connection_interval_max, // conn interval max 3241 hci_stack->le_connection_latency, // conn latency 3242 hci_stack->le_supervision_timeout, // conn latency 3243 hci_stack->le_minimum_ce_length, // min ce length 3244 hci_stack->le_maximum_ce_length // max ce length 3245 ); 3246 return; 3247 } 3248 #endif 3249 } 3250 #endif 3251 3252 // send pending HCI commands 3253 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3254 hci_connection_t * connection = (hci_connection_t *) it; 3255 3256 switch(connection->state){ 3257 case SEND_CREATE_CONNECTION: 3258 switch(connection->address_type){ 3259 #ifdef ENABLE_CLASSIC 3260 case BD_ADDR_TYPE_CLASSIC: 3261 log_info("sending hci_create_connection"); 3262 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3263 break; 3264 #endif 3265 default: 3266 #ifdef ENABLE_BLE 3267 #ifdef ENABLE_LE_CENTRAL 3268 log_info("sending hci_le_create_connection"); 3269 hci_send_cmd(&hci_le_create_connection, 3270 hci_stack->le_connection_scan_interval, // conn scan interval 3271 hci_stack->le_connection_scan_window, // conn scan windows 3272 0, // don't use whitelist 3273 connection->address_type, // peer address type 3274 connection->address, // peer bd addr 3275 hci_stack->le_own_addr_type, // our addr type: 3276 hci_stack->le_connection_interval_min, // conn interval min 3277 hci_stack->le_connection_interval_max, // conn interval max 3278 hci_stack->le_connection_latency, // conn latency 3279 hci_stack->le_supervision_timeout, // conn latency 3280 hci_stack->le_minimum_ce_length, // min ce length 3281 hci_stack->le_maximum_ce_length // max ce length 3282 ); 3283 connection->state = SENT_CREATE_CONNECTION; 3284 #endif 3285 #endif 3286 break; 3287 } 3288 return; 3289 3290 #ifdef ENABLE_CLASSIC 3291 case RECEIVED_CONNECTION_REQUEST: 3292 connection->role = HCI_ROLE_SLAVE; 3293 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3294 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3295 connection->state = ACCEPTED_CONNECTION_REQUEST; 3296 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3297 } 3298 return; 3299 #endif 3300 3301 #ifdef ENABLE_BLE 3302 #ifdef ENABLE_LE_CENTRAL 3303 case SEND_CANCEL_CONNECTION: 3304 connection->state = SENT_CANCEL_CONNECTION; 3305 hci_send_cmd(&hci_le_create_connection_cancel); 3306 return; 3307 #endif 3308 #endif 3309 case SEND_DISCONNECT: 3310 connection->state = SENT_DISCONNECT; 3311 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3312 return; 3313 3314 default: 3315 break; 3316 } 3317 3318 #ifdef ENABLE_CLASSIC 3319 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3320 log_info("responding to link key request"); 3321 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3322 link_key_t link_key; 3323 link_key_type_t link_key_type; 3324 if ( hci_stack->link_key_db 3325 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3326 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3327 connection->link_key_type = link_key_type; 3328 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3329 } else { 3330 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3331 } 3332 return; 3333 } 3334 3335 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3336 log_info("denying to pin request"); 3337 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3338 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3339 return; 3340 } 3341 3342 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3343 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3344 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3345 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3346 // tweak authentication requirements 3347 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3348 if (connection->bonding_flags & BONDING_DEDICATED){ 3349 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3350 } 3351 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3352 authreq |= 1; 3353 } 3354 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3355 } else { 3356 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3357 } 3358 return; 3359 } 3360 3361 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3362 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3363 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3364 return; 3365 } 3366 3367 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3368 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3369 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3370 return; 3371 } 3372 3373 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3374 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3375 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3376 return; 3377 } 3378 3379 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3380 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3381 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3382 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3383 return; 3384 } 3385 3386 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3387 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3388 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3389 return; 3390 } 3391 3392 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3393 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3394 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3395 return; 3396 } 3397 #endif 3398 3399 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3400 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3401 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3402 return; 3403 } 3404 3405 #ifdef ENABLE_BLE 3406 switch (connection->le_con_parameter_update_state){ 3407 // response to L2CAP CON PARAMETER UPDATE REQUEST 3408 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3409 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3410 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3411 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3412 0x0000, 0xffff); 3413 break; 3414 case CON_PARAMETER_UPDATE_REPLY: 3415 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3416 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3417 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3418 0x0000, 0xffff); 3419 break; 3420 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3421 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3422 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3423 break; 3424 default: 3425 break; 3426 } 3427 #endif 3428 } 3429 3430 hci_connection_t * connection; 3431 switch (hci_stack->state){ 3432 case HCI_STATE_INITIALIZING: 3433 hci_initializing_run(); 3434 break; 3435 3436 case HCI_STATE_HALTING: 3437 3438 log_info("HCI_STATE_HALTING"); 3439 3440 // free whitelist entries 3441 #ifdef ENABLE_BLE 3442 #ifdef ENABLE_LE_CENTRAL 3443 { 3444 btstack_linked_list_iterator_t lit; 3445 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3446 while (btstack_linked_list_iterator_has_next(&lit)){ 3447 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3448 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3449 btstack_memory_whitelist_entry_free(entry); 3450 } 3451 } 3452 #endif 3453 #endif 3454 // close all open connections 3455 connection = (hci_connection_t *) hci_stack->connections; 3456 if (connection){ 3457 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3458 if (!hci_can_send_command_packet_now()) return; 3459 3460 // check state 3461 if (connection->state == SENT_DISCONNECT) return; 3462 connection->state = SENT_DISCONNECT; 3463 3464 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3465 3466 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3467 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3468 3469 // ... which would be ignored anyway as we shutdown (free) the connection now 3470 hci_shutdown_connection(connection); 3471 3472 // finally, send the disconnect command 3473 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3474 return; 3475 } 3476 log_info("HCI_STATE_HALTING, calling off"); 3477 3478 // switch mode 3479 hci_power_control_off(); 3480 3481 log_info("HCI_STATE_HALTING, emitting state"); 3482 hci_emit_state(); 3483 log_info("HCI_STATE_HALTING, done"); 3484 break; 3485 3486 case HCI_STATE_FALLING_ASLEEP: 3487 switch(hci_stack->substate) { 3488 case HCI_FALLING_ASLEEP_DISCONNECT: 3489 log_info("HCI_STATE_FALLING_ASLEEP"); 3490 // close all open connections 3491 connection = (hci_connection_t *) hci_stack->connections; 3492 3493 #ifdef HAVE_PLATFORM_IPHONE_OS 3494 // don't close connections, if H4 supports power management 3495 if (btstack_control_iphone_power_management_enabled()){ 3496 connection = NULL; 3497 } 3498 #endif 3499 if (connection){ 3500 3501 // send disconnect 3502 if (!hci_can_send_command_packet_now()) return; 3503 3504 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3505 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3506 3507 // send disconnected event right away - causes higher layer connections to get closed, too. 3508 hci_shutdown_connection(connection); 3509 return; 3510 } 3511 3512 if (hci_classic_supported()){ 3513 // disable page and inquiry scan 3514 if (!hci_can_send_command_packet_now()) return; 3515 3516 log_info("HCI_STATE_HALTING, disabling inq scans"); 3517 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3518 3519 // continue in next sub state 3520 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3521 break; 3522 } 3523 // no break - fall through for ble-only chips 3524 3525 case HCI_FALLING_ASLEEP_COMPLETE: 3526 log_info("HCI_STATE_HALTING, calling sleep"); 3527 #ifdef HAVE_PLATFORM_IPHONE_OS 3528 // don't actually go to sleep, if H4 supports power management 3529 if (btstack_control_iphone_power_management_enabled()){ 3530 // SLEEP MODE reached 3531 hci_stack->state = HCI_STATE_SLEEPING; 3532 hci_emit_state(); 3533 break; 3534 } 3535 #endif 3536 // switch mode 3537 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3538 hci_emit_state(); 3539 break; 3540 3541 default: 3542 break; 3543 } 3544 break; 3545 3546 default: 3547 break; 3548 } 3549 } 3550 3551 int hci_send_cmd_packet(uint8_t *packet, int size){ 3552 // house-keeping 3553 3554 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3555 hci_stack->loopback_mode = packet[3]; 3556 } 3557 3558 #ifdef ENABLE_CLASSIC 3559 bd_addr_t addr; 3560 hci_connection_t * conn; 3561 3562 // create_connection? 3563 if (IS_COMMAND(packet, hci_create_connection)){ 3564 reverse_bd_addr(&packet[3], addr); 3565 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3566 3567 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3568 if (!conn){ 3569 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3570 if (!conn){ 3571 // notify client that alloc failed 3572 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3573 return -1; // packet not sent to controller 3574 } 3575 conn->state = SEND_CREATE_CONNECTION; 3576 } 3577 log_info("conn state %u", conn->state); 3578 switch (conn->state){ 3579 // if connection active exists 3580 case OPEN: 3581 // and OPEN, emit connection complete command 3582 hci_emit_connection_complete(addr, conn->con_handle, 0); 3583 return -1; // packet not sent to controller 3584 case SEND_CREATE_CONNECTION: 3585 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 3586 break; 3587 default: 3588 // otherwise, just ignore as it is already in the open process 3589 return -1; // packet not sent to controller 3590 } 3591 conn->state = SENT_CREATE_CONNECTION; 3592 } 3593 3594 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3595 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3596 } 3597 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3598 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3599 } 3600 3601 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3602 if (hci_stack->link_key_db){ 3603 reverse_bd_addr(&packet[3], addr); 3604 hci_stack->link_key_db->delete_link_key(addr); 3605 } 3606 } 3607 3608 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3609 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3610 reverse_bd_addr(&packet[3], addr); 3611 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3612 if (conn){ 3613 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3614 } 3615 } 3616 3617 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3618 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3619 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3620 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3621 reverse_bd_addr(&packet[3], addr); 3622 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3623 if (conn){ 3624 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3625 } 3626 } 3627 3628 #ifdef ENABLE_SCO_OVER_HCI 3629 // setup_synchronous_connection? Voice setting at offset 22 3630 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3631 // TODO: compare to current setting if sco connection already active 3632 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3633 } 3634 // accept_synchronus_connection? Voice setting at offset 18 3635 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3636 // TODO: compare to current setting if sco connection already active 3637 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3638 } 3639 #endif 3640 #endif 3641 3642 #ifdef ENABLE_BLE 3643 #ifdef ENABLE_LE_PERIPHERAL 3644 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3645 hci_stack->le_random_address_set = 1; 3646 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3647 } 3648 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3649 hci_stack->le_advertisements_active = packet[3]; 3650 } 3651 #endif 3652 #ifdef ENABLE_LE_CENTRAL 3653 if (IS_COMMAND(packet, hci_le_create_connection)){ 3654 // white list used? 3655 uint8_t initiator_filter_policy = packet[7]; 3656 switch (initiator_filter_policy){ 3657 case 0: 3658 // whitelist not used 3659 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3660 break; 3661 case 1: 3662 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3663 break; 3664 default: 3665 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3666 break; 3667 } 3668 } 3669 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3670 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3671 } 3672 #endif 3673 #endif 3674 3675 hci_stack->num_cmd_packets--; 3676 3677 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3678 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3679 } 3680 3681 // disconnect because of security block 3682 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3683 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3684 if (!connection) return; 3685 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3686 } 3687 3688 3689 // Configure Secure Simple Pairing 3690 3691 #ifdef ENABLE_CLASSIC 3692 3693 // enable will enable SSP during init 3694 void gap_ssp_set_enable(int enable){ 3695 hci_stack->ssp_enable = enable; 3696 } 3697 3698 static int hci_local_ssp_activated(void){ 3699 return gap_ssp_supported() && hci_stack->ssp_enable; 3700 } 3701 3702 // if set, BTstack will respond to io capability request using authentication requirement 3703 void gap_ssp_set_io_capability(int io_capability){ 3704 hci_stack->ssp_io_capability = io_capability; 3705 } 3706 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3707 hci_stack->ssp_authentication_requirement = authentication_requirement; 3708 } 3709 3710 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3711 void gap_ssp_set_auto_accept(int auto_accept){ 3712 hci_stack->ssp_auto_accept = auto_accept; 3713 } 3714 #endif 3715 3716 // va_list part of hci_send_cmd 3717 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3718 if (!hci_can_send_command_packet_now()){ 3719 log_error("hci_send_cmd called but cannot send packet now"); 3720 return 0; 3721 } 3722 3723 // for HCI INITIALIZATION 3724 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3725 hci_stack->last_cmd_opcode = cmd->opcode; 3726 3727 hci_reserve_packet_buffer(); 3728 uint8_t * packet = hci_stack->hci_packet_buffer; 3729 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3730 int err = hci_send_cmd_packet(packet, size); 3731 3732 // release packet buffer for synchronous transport implementations 3733 if (hci_transport_synchronous()){ 3734 hci_release_packet_buffer(); 3735 hci_emit_transport_packet_sent(); 3736 } 3737 3738 return err; 3739 } 3740 3741 /** 3742 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3743 */ 3744 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3745 va_list argptr; 3746 va_start(argptr, cmd); 3747 int res = hci_send_cmd_va_arg(cmd, argptr); 3748 va_end(argptr); 3749 return res; 3750 } 3751 3752 // Create various non-HCI events. 3753 // TODO: generalize, use table similar to hci_create_command 3754 3755 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3756 // dump packet 3757 if (dump) { 3758 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3759 } 3760 3761 // dispatch to all event handlers 3762 btstack_linked_list_iterator_t it; 3763 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3764 while (btstack_linked_list_iterator_has_next(&it)){ 3765 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3766 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3767 } 3768 } 3769 3770 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3771 if (!hci_stack->acl_packet_handler) return; 3772 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3773 } 3774 3775 #ifdef ENABLE_CLASSIC 3776 static void hci_notify_if_sco_can_send_now(void){ 3777 // notify SCO sender if waiting 3778 if (!hci_stack->sco_waiting_for_can_send_now) return; 3779 if (hci_can_send_sco_packet_now()){ 3780 hci_stack->sco_waiting_for_can_send_now = 0; 3781 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3782 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3783 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3784 } 3785 } 3786 3787 // parsing end emitting has been merged to reduce code size 3788 static void gap_inquiry_explode(uint8_t * packet){ 3789 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 3790 3791 uint8_t * eir_data; 3792 ad_context_t context; 3793 const uint8_t * name; 3794 uint8_t name_len; 3795 3796 int event_type = hci_event_packet_get_type(packet); 3797 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3798 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 3799 3800 // event[1] is set at the end 3801 int i; 3802 for (i=0; i<num_responses;i++){ 3803 memset(event, 0, sizeof(event)); 3804 event[0] = GAP_EVENT_INQUIRY_RESULT; 3805 uint8_t event_size = 18; // if name is not set by EIR 3806 3807 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 3808 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 3809 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 3810 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 3811 3812 switch (event_type){ 3813 case HCI_EVENT_INQUIRY_RESULT: 3814 // 14,15,16,17 = 0, size 18 3815 break; 3816 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3817 event[14] = 1; 3818 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3819 // 16,17 = 0, size 18 3820 break; 3821 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3822 event[14] = 1; 3823 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3824 // for EIR packets, there is only one reponse in it 3825 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 3826 name = NULL; 3827 // EIR data is 240 bytes in EIR event 3828 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 3829 uint8_t data_type = ad_iterator_get_data_type(&context); 3830 uint8_t data_size = ad_iterator_get_data_len(&context); 3831 const uint8_t * data = ad_iterator_get_data(&context); 3832 // Prefer Complete Local Name over Shortend Local Name 3833 switch (data_type){ 3834 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 3835 if (name) continue; 3836 /* explicit fall-through */ 3837 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 3838 name = data; 3839 name_len = data_size; 3840 break; 3841 default: 3842 break; 3843 } 3844 } 3845 if (name){ 3846 event[16] = 1; 3847 // truncate name if needed 3848 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 3849 event[17] = len; 3850 memcpy(&event[18], name, len); 3851 event_size += len; 3852 } 3853 break; 3854 } 3855 event[1] = event_size - 2; 3856 hci_emit_event(event, event_size, 1); 3857 } 3858 } 3859 #endif 3860 3861 void hci_emit_state(void){ 3862 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3863 uint8_t event[3]; 3864 event[0] = BTSTACK_EVENT_STATE; 3865 event[1] = sizeof(event) - 2; 3866 event[2] = hci_stack->state; 3867 hci_emit_event(event, sizeof(event), 1); 3868 } 3869 3870 #ifdef ENABLE_CLASSIC 3871 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3872 uint8_t event[13]; 3873 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3874 event[1] = sizeof(event) - 2; 3875 event[2] = status; 3876 little_endian_store_16(event, 3, con_handle); 3877 reverse_bd_addr(address, &event[5]); 3878 event[11] = 1; // ACL connection 3879 event[12] = 0; // encryption disabled 3880 hci_emit_event(event, sizeof(event), 1); 3881 } 3882 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3883 if (disable_l2cap_timeouts) return; 3884 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3885 uint8_t event[4]; 3886 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3887 event[1] = sizeof(event) - 2; 3888 little_endian_store_16(event, 2, conn->con_handle); 3889 hci_emit_event(event, sizeof(event), 1); 3890 } 3891 #endif 3892 3893 #ifdef ENABLE_BLE 3894 #ifdef ENABLE_LE_CENTRAL 3895 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3896 uint8_t event[21]; 3897 event[0] = HCI_EVENT_LE_META; 3898 event[1] = sizeof(event) - 2; 3899 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3900 event[3] = status; 3901 little_endian_store_16(event, 4, con_handle); 3902 event[6] = 0; // TODO: role 3903 event[7] = address_type; 3904 reverse_bd_addr(address, &event[8]); 3905 little_endian_store_16(event, 14, 0); // interval 3906 little_endian_store_16(event, 16, 0); // latency 3907 little_endian_store_16(event, 18, 0); // supervision timeout 3908 event[20] = 0; // master clock accuracy 3909 hci_emit_event(event, sizeof(event), 1); 3910 } 3911 #endif 3912 #endif 3913 3914 static void hci_emit_transport_packet_sent(void){ 3915 // notify upper stack that it might be possible to send again 3916 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 3917 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 3918 } 3919 3920 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3921 uint8_t event[6]; 3922 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3923 event[1] = sizeof(event) - 2; 3924 event[2] = 0; // status = OK 3925 little_endian_store_16(event, 3, con_handle); 3926 event[5] = reason; 3927 hci_emit_event(event, sizeof(event), 1); 3928 } 3929 3930 static void hci_emit_nr_connections_changed(void){ 3931 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3932 uint8_t event[3]; 3933 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3934 event[1] = sizeof(event) - 2; 3935 event[2] = nr_hci_connections(); 3936 hci_emit_event(event, sizeof(event), 1); 3937 } 3938 3939 static void hci_emit_hci_open_failed(void){ 3940 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3941 uint8_t event[2]; 3942 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3943 event[1] = sizeof(event) - 2; 3944 hci_emit_event(event, sizeof(event), 1); 3945 } 3946 3947 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3948 log_info("hci_emit_dedicated_bonding_result %u ", status); 3949 uint8_t event[9]; 3950 int pos = 0; 3951 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3952 event[pos++] = sizeof(event) - 2; 3953 event[pos++] = status; 3954 reverse_bd_addr(address, &event[pos]); 3955 hci_emit_event(event, sizeof(event), 1); 3956 } 3957 3958 3959 #ifdef ENABLE_CLASSIC 3960 3961 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3962 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3963 uint8_t event[5]; 3964 int pos = 0; 3965 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3966 event[pos++] = sizeof(event) - 2; 3967 little_endian_store_16(event, 2, con_handle); 3968 pos += 2; 3969 event[pos++] = level; 3970 hci_emit_event(event, sizeof(event), 1); 3971 } 3972 3973 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3974 if (!connection) return LEVEL_0; 3975 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3976 return gap_security_level_for_link_key_type(connection->link_key_type); 3977 } 3978 3979 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3980 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3981 uint8_t event[3]; 3982 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3983 event[1] = sizeof(event) - 2; 3984 event[2] = enabled; 3985 hci_emit_event(event, sizeof(event), 1); 3986 } 3987 3988 #ifdef ENABLE_CLASSIC 3989 // query if remote side supports eSCO 3990 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3991 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3992 if (!connection) return 0; 3993 return connection->remote_supported_feature_eSCO; 3994 } 3995 3996 // query if remote side supports SSP 3997 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3998 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3999 if (!connection) return 0; 4000 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4001 } 4002 4003 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4004 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4005 } 4006 #endif 4007 4008 // GAP API 4009 /** 4010 * @bbrief enable/disable bonding. default is enabled 4011 * @praram enabled 4012 */ 4013 void gap_set_bondable_mode(int enable){ 4014 hci_stack->bondable = enable ? 1 : 0; 4015 } 4016 /** 4017 * @brief Get bondable mode. 4018 * @return 1 if bondable 4019 */ 4020 int gap_get_bondable_mode(void){ 4021 return hci_stack->bondable; 4022 } 4023 4024 /** 4025 * @brief map link keys to security levels 4026 */ 4027 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4028 switch (link_key_type){ 4029 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4030 return LEVEL_4; 4031 case COMBINATION_KEY: 4032 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4033 return LEVEL_3; 4034 default: 4035 return LEVEL_2; 4036 } 4037 } 4038 4039 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4040 log_info("gap_mitm_protection_required_for_security_level %u", level); 4041 return level > LEVEL_2; 4042 } 4043 4044 /** 4045 * @brief get current security level 4046 */ 4047 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4048 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4049 if (!connection) return LEVEL_0; 4050 return gap_security_level_for_connection(connection); 4051 } 4052 4053 /** 4054 * @brief request connection to device to 4055 * @result GAP_AUTHENTICATION_RESULT 4056 */ 4057 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4058 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4059 if (!connection){ 4060 hci_emit_security_level(con_handle, LEVEL_0); 4061 return; 4062 } 4063 gap_security_level_t current_level = gap_security_level(con_handle); 4064 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4065 requested_level, connection->requested_security_level, current_level); 4066 4067 // assumption: earlier requested security higher than current level => security request is active 4068 if (current_level < connection->requested_security_level){ 4069 if (connection->requested_security_level < requested_level){ 4070 // increase requested level as new level is higher 4071 4072 // TODO: handle re-authentication when done 4073 4074 connection->requested_security_level = requested_level; 4075 } 4076 return; 4077 } 4078 4079 // no request active, notify if security sufficient 4080 if (requested_level <= current_level){ 4081 hci_emit_security_level(con_handle, current_level); 4082 return; 4083 } 4084 4085 // start pairing to increase security level 4086 connection->requested_security_level = requested_level; 4087 4088 #if 0 4089 // sending encryption request without a link key results in an error. 4090 // TODO: figure out how to use it properly 4091 4092 // would enabling ecnryption suffice (>= LEVEL_2)? 4093 if (hci_stack->link_key_db){ 4094 link_key_type_t link_key_type; 4095 link_key_t link_key; 4096 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4097 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4098 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4099 return; 4100 } 4101 } 4102 } 4103 #endif 4104 4105 // start to authenticate connection 4106 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4107 hci_run(); 4108 } 4109 4110 /** 4111 * @brief start dedicated bonding with device. disconnect after bonding 4112 * @param device 4113 * @param request MITM protection 4114 * @result GAP_DEDICATED_BONDING_COMPLETE 4115 */ 4116 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4117 4118 // create connection state machine 4119 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 4120 4121 if (!connection){ 4122 return BTSTACK_MEMORY_ALLOC_FAILED; 4123 } 4124 4125 // delete linkn key 4126 gap_drop_link_key_for_bd_addr(device); 4127 4128 // configure LEVEL_2/3, dedicated bonding 4129 connection->state = SEND_CREATE_CONNECTION; 4130 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4131 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4132 connection->bonding_flags = BONDING_DEDICATED; 4133 4134 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4135 4136 // handle: connnection failure (connection complete != ok) 4137 // handle: authentication failure 4138 // handle: disconnect on done 4139 4140 hci_run(); 4141 4142 return 0; 4143 } 4144 #endif 4145 4146 void gap_set_local_name(const char * local_name){ 4147 hci_stack->local_name = local_name; 4148 } 4149 4150 4151 #ifdef ENABLE_BLE 4152 4153 #ifdef ENABLE_LE_CENTRAL 4154 void gap_start_scan(void){ 4155 hci_stack->le_scanning_enabled = 1; 4156 hci_run(); 4157 } 4158 4159 void gap_stop_scan(void){ 4160 hci_stack->le_scanning_enabled = 0; 4161 hci_run(); 4162 } 4163 4164 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4165 hci_stack->le_scan_type = scan_type; 4166 hci_stack->le_scan_interval = scan_interval; 4167 hci_stack->le_scan_window = scan_window; 4168 hci_run(); 4169 } 4170 4171 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4172 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4173 if (!conn){ 4174 log_info("gap_connect: no connection exists yet, creating context"); 4175 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4176 if (!conn){ 4177 // notify client that alloc failed 4178 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4179 log_info("gap_connect: failed to alloc hci_connection_t"); 4180 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4181 } 4182 conn->state = SEND_CREATE_CONNECTION; 4183 log_info("gap_connect: send create connection next"); 4184 hci_run(); 4185 return 0; 4186 } 4187 4188 if (!hci_is_le_connection(conn) || 4189 conn->state == SEND_CREATE_CONNECTION || 4190 conn->state == SENT_CREATE_CONNECTION) { 4191 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4192 log_error("gap_connect: classic connection or connect is already being created"); 4193 return GATT_CLIENT_IN_WRONG_STATE; 4194 } 4195 4196 log_info("gap_connect: context exists with state %u", conn->state); 4197 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4198 hci_run(); 4199 return 0; 4200 } 4201 4202 // @assumption: only a single outgoing LE Connection exists 4203 static hci_connection_t * gap_get_outgoing_connection(void){ 4204 btstack_linked_item_t *it; 4205 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4206 hci_connection_t * conn = (hci_connection_t *) it; 4207 if (!hci_is_le_connection(conn)) continue; 4208 switch (conn->state){ 4209 case SEND_CREATE_CONNECTION: 4210 case SENT_CREATE_CONNECTION: 4211 case SENT_CANCEL_CONNECTION: 4212 return conn; 4213 default: 4214 break; 4215 }; 4216 } 4217 return NULL; 4218 } 4219 4220 uint8_t gap_connect_cancel(void){ 4221 hci_connection_t * conn = gap_get_outgoing_connection(); 4222 if (!conn) return 0; 4223 switch (conn->state){ 4224 case SEND_CREATE_CONNECTION: 4225 // skip sending create connection and emit event instead 4226 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4227 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4228 btstack_memory_hci_connection_free( conn ); 4229 break; 4230 case SENT_CREATE_CONNECTION: 4231 // request to send cancel connection 4232 conn->state = SEND_CANCEL_CONNECTION; 4233 hci_run(); 4234 break; 4235 default: 4236 break; 4237 } 4238 return 0; 4239 } 4240 #endif 4241 4242 #ifdef ENABLE_LE_CENTRAL 4243 /** 4244 * @brief Set connection parameters for outgoing connections 4245 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4246 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4247 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4248 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4249 * @param conn_latency, default: 4 4250 * @param supervision_timeout (unit: 10ms), default: 720 ms 4251 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4252 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4253 */ 4254 4255 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4256 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4257 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4258 hci_stack->le_connection_scan_interval = conn_scan_interval; 4259 hci_stack->le_connection_scan_window = conn_scan_window; 4260 hci_stack->le_connection_interval_min = conn_interval_min; 4261 hci_stack->le_connection_interval_max = conn_interval_max; 4262 hci_stack->le_connection_latency = conn_latency; 4263 hci_stack->le_supervision_timeout = supervision_timeout; 4264 hci_stack->le_minimum_ce_length = min_ce_length; 4265 hci_stack->le_maximum_ce_length = max_ce_length; 4266 } 4267 #endif 4268 4269 /** 4270 * @brief Updates the connection parameters for a given LE connection 4271 * @param handle 4272 * @param conn_interval_min (unit: 1.25ms) 4273 * @param conn_interval_max (unit: 1.25ms) 4274 * @param conn_latency 4275 * @param supervision_timeout (unit: 10ms) 4276 * @returns 0 if ok 4277 */ 4278 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4279 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4280 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4281 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4282 connection->le_conn_interval_min = conn_interval_min; 4283 connection->le_conn_interval_max = conn_interval_max; 4284 connection->le_conn_latency = conn_latency; 4285 connection->le_supervision_timeout = supervision_timeout; 4286 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4287 hci_run(); 4288 return 0; 4289 } 4290 4291 /** 4292 * @brief Request an update of the connection parameter for a given LE connection 4293 * @param handle 4294 * @param conn_interval_min (unit: 1.25ms) 4295 * @param conn_interval_max (unit: 1.25ms) 4296 * @param conn_latency 4297 * @param supervision_timeout (unit: 10ms) 4298 * @returns 0 if ok 4299 */ 4300 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4301 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4302 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4303 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4304 connection->le_conn_interval_min = conn_interval_min; 4305 connection->le_conn_interval_max = conn_interval_max; 4306 connection->le_conn_latency = conn_latency; 4307 connection->le_supervision_timeout = supervision_timeout; 4308 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4309 hci_run(); 4310 return 0; 4311 } 4312 4313 #ifdef ENABLE_LE_PERIPHERAL 4314 4315 static void gap_advertisments_changed(void){ 4316 // disable advertisements before updating adv, scan data, or adv params 4317 if (hci_stack->le_advertisements_active){ 4318 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4319 } 4320 hci_run(); 4321 } 4322 4323 /** 4324 * @brief Set Advertisement Data 4325 * @param advertising_data_length 4326 * @param advertising_data (max 31 octets) 4327 * @note data is not copied, pointer has to stay valid 4328 */ 4329 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4330 hci_stack->le_advertisements_data_len = advertising_data_length; 4331 hci_stack->le_advertisements_data = advertising_data; 4332 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4333 gap_advertisments_changed(); 4334 } 4335 4336 /** 4337 * @brief Set Scan Response Data 4338 * @param advertising_data_length 4339 * @param advertising_data (max 31 octets) 4340 * @note data is not copied, pointer has to stay valid 4341 */ 4342 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4343 hci_stack->le_scan_response_data_len = scan_response_data_length; 4344 hci_stack->le_scan_response_data = scan_response_data; 4345 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4346 gap_advertisments_changed(); 4347 } 4348 4349 /** 4350 * @brief Set Advertisement Parameters 4351 * @param adv_int_min 4352 * @param adv_int_max 4353 * @param adv_type 4354 * @param direct_address_type 4355 * @param direct_address 4356 * @param channel_map 4357 * @param filter_policy 4358 * 4359 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4360 */ 4361 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4362 uint8_t direct_address_typ, bd_addr_t direct_address, 4363 uint8_t channel_map, uint8_t filter_policy) { 4364 4365 hci_stack->le_advertisements_interval_min = adv_int_min; 4366 hci_stack->le_advertisements_interval_max = adv_int_max; 4367 hci_stack->le_advertisements_type = adv_type; 4368 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4369 hci_stack->le_advertisements_channel_map = channel_map; 4370 hci_stack->le_advertisements_filter_policy = filter_policy; 4371 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4372 4373 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4374 gap_advertisments_changed(); 4375 } 4376 4377 /** 4378 * @brief Enable/Disable Advertisements 4379 * @param enabled 4380 */ 4381 void gap_advertisements_enable(int enabled){ 4382 hci_stack->le_advertisements_enabled = enabled; 4383 if (enabled && !hci_stack->le_advertisements_active){ 4384 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4385 } 4386 if (!enabled && hci_stack->le_advertisements_active){ 4387 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4388 } 4389 hci_run(); 4390 } 4391 4392 #endif 4393 4394 void hci_le_set_own_address_type(uint8_t own_address_type){ 4395 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4396 if (own_address_type == hci_stack->le_own_addr_type) return; 4397 hci_stack->le_own_addr_type = own_address_type; 4398 4399 #ifdef ENABLE_LE_PERIPHERAL 4400 // update advertisement parameters, too 4401 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4402 gap_advertisments_changed(); 4403 #endif 4404 #ifdef ENABLE_LE_CENTRAL 4405 // note: we don't update scan parameters or modify ongoing connection attempts 4406 #endif 4407 } 4408 4409 #endif 4410 4411 uint8_t gap_disconnect(hci_con_handle_t handle){ 4412 hci_connection_t * conn = hci_connection_for_handle(handle); 4413 if (!conn){ 4414 hci_emit_disconnection_complete(handle, 0); 4415 return 0; 4416 } 4417 // ignore if already disconnected 4418 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4419 return 0; 4420 } 4421 conn->state = SEND_DISCONNECT; 4422 hci_run(); 4423 return 0; 4424 } 4425 4426 /** 4427 * @brief Get connection type 4428 * @param con_handle 4429 * @result connection_type 4430 */ 4431 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4432 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4433 if (!conn) return GAP_CONNECTION_INVALID; 4434 switch (conn->address_type){ 4435 case BD_ADDR_TYPE_LE_PUBLIC: 4436 case BD_ADDR_TYPE_LE_RANDOM: 4437 return GAP_CONNECTION_LE; 4438 case BD_ADDR_TYPE_SCO: 4439 return GAP_CONNECTION_SCO; 4440 case BD_ADDR_TYPE_CLASSIC: 4441 return GAP_CONNECTION_ACL; 4442 default: 4443 return GAP_CONNECTION_INVALID; 4444 } 4445 } 4446 4447 #ifdef ENABLE_BLE 4448 4449 #ifdef ENABLE_LE_CENTRAL 4450 /** 4451 * @brief Auto Connection Establishment - Start Connecting to device 4452 * @param address_typ 4453 * @param address 4454 * @returns 0 if ok 4455 */ 4456 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4457 // check capacity 4458 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4459 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4460 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4461 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4462 entry->address_type = address_type; 4463 memcpy(entry->address, address, 6); 4464 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4465 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4466 hci_run(); 4467 return 0; 4468 } 4469 4470 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4471 btstack_linked_list_iterator_t it; 4472 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4473 while (btstack_linked_list_iterator_has_next(&it)){ 4474 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4475 if (entry->address_type != address_type) continue; 4476 if (memcmp(entry->address, address, 6) != 0) continue; 4477 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4478 // remove from controller if already present 4479 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4480 continue; 4481 } 4482 // direclty remove entry from whitelist 4483 btstack_linked_list_iterator_remove(&it); 4484 btstack_memory_whitelist_entry_free(entry); 4485 } 4486 } 4487 4488 /** 4489 * @brief Auto Connection Establishment - Stop Connecting to device 4490 * @param address_typ 4491 * @param address 4492 * @returns 0 if ok 4493 */ 4494 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4495 hci_remove_from_whitelist(address_type, address); 4496 hci_run(); 4497 return 0; 4498 } 4499 4500 /** 4501 * @brief Auto Connection Establishment - Stop everything 4502 * @note Convenience function to stop all active auto connection attempts 4503 */ 4504 void gap_auto_connection_stop_all(void){ 4505 btstack_linked_list_iterator_t it; 4506 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4507 while (btstack_linked_list_iterator_has_next(&it)){ 4508 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4509 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4510 // remove from controller if already present 4511 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4512 continue; 4513 } 4514 // directly remove entry from whitelist 4515 btstack_linked_list_iterator_remove(&it); 4516 btstack_memory_whitelist_entry_free(entry); 4517 } 4518 hci_run(); 4519 } 4520 #endif 4521 #endif 4522 4523 #ifdef ENABLE_CLASSIC 4524 /** 4525 * @brief Set Extended Inquiry Response data 4526 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4527 * @note has to be done before stack starts up 4528 */ 4529 void gap_set_extended_inquiry_response(const uint8_t * data){ 4530 hci_stack->eir_data = data; 4531 } 4532 4533 /** 4534 * @brief Start GAP Classic Inquiry 4535 * @param duration in 1.28s units 4536 * @return 0 if ok 4537 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4538 */ 4539 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4540 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4541 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4542 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4543 } 4544 hci_stack->inquiry_state = duration_in_1280ms_units; 4545 hci_run(); 4546 return 0; 4547 } 4548 4549 /** 4550 * @brief Stop GAP Classic Inquiry 4551 * @returns 0 if ok 4552 */ 4553 int gap_inquiry_stop(void){ 4554 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN || hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4555 // emit inquiry complete event, before it even started 4556 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4557 hci_emit_event(event, sizeof(event), 1); 4558 return 0; 4559 } 4560 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4561 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4562 hci_run(); 4563 return 0; 4564 } 4565 4566 4567 /** 4568 * @brief Remote Name Request 4569 * @param addr 4570 * @param page_scan_repetition_mode 4571 * @param clock_offset only used when bit 15 is set 4572 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4573 */ 4574 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4575 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4576 memcpy(hci_stack->remote_name_addr, addr, 6); 4577 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4578 hci_stack->remote_name_clock_offset = clock_offset; 4579 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4580 hci_run(); 4581 return 0; 4582 } 4583 4584 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4585 hci_stack->gap_pairing_state = state; 4586 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4587 hci_run(); 4588 return 0; 4589 } 4590 4591 /** 4592 * @brief Legacy Pairing Pin Code Response 4593 * @param addr 4594 * @param pin 4595 * @return 0 if ok 4596 */ 4597 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4598 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4599 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 4600 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4601 } 4602 4603 /** 4604 * @brief Abort Legacy Pairing 4605 * @param addr 4606 * @param pin 4607 * @return 0 if ok 4608 */ 4609 int gap_pin_code_negative(bd_addr_t addr){ 4610 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4611 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4612 } 4613 4614 /** 4615 * @brief SSP Passkey Response 4616 * @param addr 4617 * @param passkey 4618 * @return 0 if ok 4619 */ 4620 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4621 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4622 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 4623 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4624 } 4625 4626 /** 4627 * @brief Abort SSP Passkey Entry/Pairing 4628 * @param addr 4629 * @param pin 4630 * @return 0 if ok 4631 */ 4632 int gap_ssp_passkey_negative(bd_addr_t addr){ 4633 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4634 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4635 } 4636 4637 /** 4638 * @brief Accept SSP Numeric Comparison 4639 * @param addr 4640 * @param passkey 4641 * @return 0 if ok 4642 */ 4643 int gap_ssp_confirmation_response(bd_addr_t addr){ 4644 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4645 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4646 } 4647 4648 /** 4649 * @brief Abort SSP Numeric Comparison/Pairing 4650 * @param addr 4651 * @param pin 4652 * @return 0 if ok 4653 */ 4654 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4655 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4656 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4657 } 4658 4659 /** 4660 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4661 * @param inquiry_mode see bluetooth_defines.h 4662 */ 4663 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4664 hci_stack->inquiry_mode = mode; 4665 } 4666 4667 /** 4668 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4669 */ 4670 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4671 hci_stack->sco_voice_setting = voice_setting; 4672 } 4673 4674 /** 4675 * @brief Get SCO Voice Setting 4676 * @return current voice setting 4677 */ 4678 uint16_t hci_get_sco_voice_setting(void){ 4679 return hci_stack->sco_voice_setting; 4680 } 4681 4682 /** @brief Get SCO packet length for current SCO Voice setting 4683 * @note Using SCO packets of the exact length is required for USB transfer 4684 * @return Length of SCO packets in bytes (not audio frames) 4685 */ 4686 int hci_get_sco_packet_length(void){ 4687 int sco_packet_length = 0; 4688 4689 #ifdef ENABLE_CLASSIC 4690 #ifdef ENABLE_SCO_OVER_HCI 4691 // see Core Spec for H2 USB Transfer. 4692 4693 // CVSD requires twice as much bytes 4694 int multiplier = hci_stack->sco_voice_setting & 0x0020 ? 2 : 1; 4695 4696 // 3 byte SCO header + 24 bytes per connection 4697 sco_packet_length = 3 + 24 * hci_number_sco_connections() * multiplier; 4698 #endif 4699 #endif 4700 return sco_packet_length; 4701 } 4702 4703 /** 4704 * @brief Sets the master/slave policy 4705 * @param policy (0: attempt to become master, 1: let connecting device decide) 4706 */ 4707 void hci_set_master_slave_policy(uint8_t policy){ 4708 hci_stack->master_slave_policy = policy; 4709 } 4710 4711 #endif 4712 4713 HCI_STATE hci_get_state(void){ 4714 return hci_stack->state; 4715 } 4716 4717 4718 /** 4719 * @brief Set callback for Bluetooth Hardware Error 4720 */ 4721 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4722 hci_stack->hardware_error_callback = fn; 4723 } 4724 4725 void hci_disconnect_all(void){ 4726 btstack_linked_list_iterator_t it; 4727 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4728 while (btstack_linked_list_iterator_has_next(&it)){ 4729 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4730 if (con->state == SENT_DISCONNECT) continue; 4731 con->state = SEND_DISCONNECT; 4732 } 4733 hci_run(); 4734 } 4735 4736 uint16_t hci_get_manufacturer(void){ 4737 return hci_stack->manufacturer; 4738 } 4739 4740 #ifdef ENABLE_BLE 4741 4742 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 4743 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 4744 if (!hci_con) return NULL; 4745 return &hci_con->sm_connection; 4746 } 4747 4748 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 4749 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 4750 4751 int gap_encryption_key_size(hci_con_handle_t con_handle){ 4752 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4753 if (!sm_conn) return 0; // wrong connection 4754 if (!sm_conn->sm_connection_encrypted) return 0; 4755 return sm_conn->sm_actual_encryption_key_size; 4756 } 4757 4758 int gap_authenticated(hci_con_handle_t con_handle){ 4759 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4760 if (!sm_conn) return 0; // wrong connection 4761 if (!sm_conn->sm_connection_encrypted) return 0; // unencrypted connection cannot be authenticated 4762 return sm_conn->sm_connection_authenticated; 4763 } 4764 4765 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 4766 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4767 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 4768 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 4769 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 4770 return sm_conn->sm_connection_authorization_state; 4771 } 4772 #endif 4773