1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #endif 63 64 #include <stdarg.h> 65 #include <string.h> 66 #include <stdio.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 #define HCI_RESET_RESEND_TIMEOUT_MS 200 98 99 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 100 #ifndef GAP_INQUIRY_MAX_NAME_LEN 101 #define GAP_INQUIRY_MAX_NAME_LEN 32 102 #endif 103 104 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 105 #define GAP_INQUIRY_DURATION_MIN 0x01 106 #define GAP_INQUIRY_DURATION_MAX 0x30 107 #define GAP_INQUIRY_STATE_ACTIVE 0x80 108 #define GAP_INQUIRY_STATE_IDLE 0 109 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 110 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 111 112 // GAP Remote Name Request 113 #define GAP_REMOTE_NAME_STATE_IDLE 0 114 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 115 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 116 117 // GAP Pairing 118 #define GAP_PAIRING_STATE_IDLE 0 119 #define GAP_PAIRING_STATE_SEND_PIN 1 120 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 121 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 122 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 123 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 124 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 125 126 127 // prototypes 128 #ifdef ENABLE_CLASSIC 129 static void hci_update_scan_enable(void); 130 static void hci_emit_discoverable_enabled(uint8_t enabled); 131 static int hci_local_ssp_activated(void); 132 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 133 static void hci_notify_if_sco_can_send_now(void); 134 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 135 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 136 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 137 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 138 static void hci_connection_timestamp(hci_connection_t *connection); 139 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 140 static void gap_inquiry_explode(uint8_t * packet); 141 #endif 142 143 static int hci_power_control_on(void); 144 static void hci_power_control_off(void); 145 static void hci_state_reset(void); 146 static void hci_emit_transport_packet_sent(void); 147 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 148 static void hci_emit_nr_connections_changed(void); 149 static void hci_emit_hci_open_failed(void); 150 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 151 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 152 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 153 static void hci_run(void); 154 static int hci_is_le_connection(hci_connection_t * connection); 155 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 156 157 #ifdef ENABLE_BLE 158 #ifdef ENABLE_LE_CENTRAL 159 // called from test/ble_client/advertising_data_parser.c 160 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 161 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 162 static hci_connection_t * gap_get_outgoing_connection(void); 163 #endif 164 #endif 165 166 // the STACK is here 167 #ifndef HAVE_MALLOC 168 static hci_stack_t hci_stack_static; 169 #endif 170 static hci_stack_t * hci_stack = NULL; 171 172 #ifdef ENABLE_CLASSIC 173 // default name 174 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 175 176 // test helper 177 static uint8_t disable_l2cap_timeouts = 0; 178 #endif 179 180 /** 181 * create connection for given address 182 * 183 * @return connection OR NULL, if no memory left 184 */ 185 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 186 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 187 hci_connection_t * conn = btstack_memory_hci_connection_get(); 188 if (!conn) return NULL; 189 memset(conn, 0, sizeof(hci_connection_t)); 190 bd_addr_copy(conn->address, addr); 191 conn->address_type = addr_type; 192 conn->con_handle = 0xffff; 193 conn->authentication_flags = AUTH_FLAGS_NONE; 194 conn->bonding_flags = 0; 195 conn->requested_security_level = LEVEL_0; 196 #ifdef ENABLE_CLASSIC 197 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 198 btstack_run_loop_set_timer_context(&conn->timeout, conn); 199 hci_connection_timestamp(conn); 200 #endif 201 conn->acl_recombination_length = 0; 202 conn->acl_recombination_pos = 0; 203 conn->num_acl_packets_sent = 0; 204 conn->num_sco_packets_sent = 0; 205 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 206 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 207 return conn; 208 } 209 210 211 /** 212 * get le connection parameter range 213 * 214 * @return le connection parameter range struct 215 */ 216 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 217 *range = hci_stack->le_connection_parameter_range; 218 } 219 220 /** 221 * set le connection parameter range 222 * 223 */ 224 225 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 226 hci_stack->le_connection_parameter_range = *range; 227 } 228 229 /** 230 * @brief Test if connection parameters are inside in existing rage 231 * @param conn_interval_min (unit: 1.25ms) 232 * @param conn_interval_max (unit: 1.25ms) 233 * @param conn_latency 234 * @param supervision_timeout (unit: 10ms) 235 * @returns 1 if included 236 */ 237 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 238 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 239 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 240 241 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 242 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 243 244 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 245 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 246 247 return 1; 248 } 249 250 /** 251 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 252 * @note: default: 1 253 * @param max_peripheral_connections 254 */ 255 #ifdef ENABLE_LE_PERIPHERAL 256 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 257 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 258 } 259 #endif 260 261 /** 262 * get hci connections iterator 263 * 264 * @return hci connections iterator 265 */ 266 267 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 268 btstack_linked_list_iterator_init(it, &hci_stack->connections); 269 } 270 271 /** 272 * get connection for a given handle 273 * 274 * @return connection OR NULL, if not found 275 */ 276 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 277 btstack_linked_list_iterator_t it; 278 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 279 while (btstack_linked_list_iterator_has_next(&it)){ 280 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 281 if ( item->con_handle == con_handle ) { 282 return item; 283 } 284 } 285 return NULL; 286 } 287 288 /** 289 * get connection for given address 290 * 291 * @return connection OR NULL, if not found 292 */ 293 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 294 btstack_linked_list_iterator_t it; 295 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 296 while (btstack_linked_list_iterator_has_next(&it)){ 297 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 298 if (connection->address_type != addr_type) continue; 299 if (memcmp(addr, connection->address, 6) != 0) continue; 300 return connection; 301 } 302 return NULL; 303 } 304 305 306 #ifdef ENABLE_CLASSIC 307 308 #ifdef ENABLE_SCO_OVER_HCI 309 static int hci_number_sco_connections(void){ 310 int connections = 0; 311 btstack_linked_list_iterator_t it; 312 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 313 while (btstack_linked_list_iterator_has_next(&it)){ 314 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 315 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 316 connections++; 317 } 318 return connections; 319 } 320 #endif 321 322 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 323 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 324 #ifdef HAVE_EMBEDDED_TICK 325 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 326 // connections might be timed out 327 hci_emit_l2cap_check_timeout(connection); 328 } 329 #else 330 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 331 // connections might be timed out 332 hci_emit_l2cap_check_timeout(connection); 333 } 334 #endif 335 } 336 337 static void hci_connection_timestamp(hci_connection_t *connection){ 338 #ifdef HAVE_EMBEDDED_TICK 339 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 340 #else 341 connection->timestamp = btstack_run_loop_get_time_ms(); 342 #endif 343 } 344 345 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 346 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 347 } 348 349 350 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 351 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 352 } 353 354 /** 355 * add authentication flags and reset timer 356 * @note: assumes classic connection 357 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 358 */ 359 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 360 bd_addr_t addr; 361 reverse_bd_addr(bd_addr, addr); 362 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 363 if (conn) { 364 connectionSetAuthenticationFlags(conn, flags); 365 hci_connection_timestamp(conn); 366 } 367 } 368 369 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 370 hci_connection_t * conn = hci_connection_for_handle(handle); 371 if (!conn) return 0; 372 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 373 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 374 return 0; 375 } 376 377 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 378 if (!hci_stack->link_key_db) return; 379 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 380 hci_stack->link_key_db->delete_link_key(addr); 381 } 382 383 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 384 if (!hci_stack->link_key_db) return; 385 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 386 hci_stack->link_key_db->put_link_key(addr, link_key, type); 387 } 388 389 void gap_delete_all_link_keys(void){ 390 bd_addr_t addr; 391 link_key_t link_key; 392 link_key_type_t type; 393 btstack_link_key_iterator_t it; 394 int ok = gap_link_key_iterator_init(&it); 395 if (!ok) { 396 log_error("could not initialize iterator"); 397 return; 398 } 399 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 400 gap_drop_link_key_for_bd_addr(addr); 401 } 402 gap_link_key_iterator_done(&it); 403 } 404 405 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 406 if (!hci_stack->link_key_db) return 0; 407 if (!hci_stack->link_key_db->iterator_init) return 0; 408 return hci_stack->link_key_db->iterator_init(it); 409 } 410 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 411 if (!hci_stack->link_key_db) return 0; 412 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 413 } 414 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 415 if (!hci_stack->link_key_db) return; 416 hci_stack->link_key_db->iterator_done(it); 417 } 418 #endif 419 420 static int hci_is_le_connection(hci_connection_t * connection){ 421 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 422 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 423 } 424 425 /** 426 * count connections 427 */ 428 static int nr_hci_connections(void){ 429 int count = 0; 430 btstack_linked_item_t *it; 431 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 432 return count; 433 } 434 435 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 436 437 unsigned int num_packets_sent_classic = 0; 438 unsigned int num_packets_sent_le = 0; 439 440 btstack_linked_item_t *it; 441 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 442 hci_connection_t * connection = (hci_connection_t *) it; 443 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 444 num_packets_sent_classic += connection->num_acl_packets_sent; 445 } else { 446 num_packets_sent_le += connection->num_acl_packets_sent; 447 } 448 } 449 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 450 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 451 int free_slots_le = 0; 452 453 if (free_slots_classic < 0){ 454 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 455 return 0; 456 } 457 458 if (hci_stack->le_acl_packets_total_num){ 459 // if we have LE slots, they are used 460 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 461 if (free_slots_le < 0){ 462 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 463 return 0; 464 } 465 } else { 466 // otherwise, classic slots are used for LE, too 467 free_slots_classic -= num_packets_sent_le; 468 if (free_slots_classic < 0){ 469 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 470 return 0; 471 } 472 } 473 474 switch (address_type){ 475 case BD_ADDR_TYPE_UNKNOWN: 476 log_error("hci_number_free_acl_slots: unknown address type"); 477 return 0; 478 479 case BD_ADDR_TYPE_CLASSIC: 480 return free_slots_classic; 481 482 default: 483 if (hci_stack->le_acl_packets_total_num){ 484 return free_slots_le; 485 } 486 return free_slots_classic; 487 } 488 } 489 490 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 491 // get connection type 492 hci_connection_t * connection = hci_connection_for_handle(con_handle); 493 if (!connection){ 494 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 495 return 0; 496 } 497 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 498 } 499 500 #ifdef ENABLE_CLASSIC 501 static int hci_number_free_sco_slots(void){ 502 unsigned int num_sco_packets_sent = 0; 503 btstack_linked_item_t *it; 504 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 505 hci_connection_t * connection = (hci_connection_t *) it; 506 num_sco_packets_sent += connection->num_sco_packets_sent; 507 } 508 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 509 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 510 return 0; 511 } 512 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 513 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 514 } 515 #endif 516 517 // only used to send HCI Host Number Completed Packets 518 static int hci_can_send_comand_packet_transport(void){ 519 if (hci_stack->hci_packet_buffer_reserved) return 0; 520 521 // check for async hci transport implementations 522 if (hci_stack->hci_transport->can_send_packet_now){ 523 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 524 return 0; 525 } 526 } 527 return 1; 528 } 529 530 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 531 int hci_can_send_command_packet_now(void){ 532 if (hci_can_send_comand_packet_transport() == 0) return 0; 533 return hci_stack->num_cmd_packets > 0; 534 } 535 536 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 537 // check for async hci transport implementations 538 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 539 return hci_stack->hci_transport->can_send_packet_now(packet_type); 540 } 541 542 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 543 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 544 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 545 } 546 547 int hci_can_send_acl_le_packet_now(void){ 548 if (hci_stack->hci_packet_buffer_reserved) return 0; 549 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 550 } 551 552 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 553 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 554 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 555 } 556 557 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 558 if (hci_stack->hci_packet_buffer_reserved) return 0; 559 return hci_can_send_prepared_acl_packet_now(con_handle); 560 } 561 562 #ifdef ENABLE_CLASSIC 563 int hci_can_send_acl_classic_packet_now(void){ 564 if (hci_stack->hci_packet_buffer_reserved) return 0; 565 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 566 } 567 568 int hci_can_send_prepared_sco_packet_now(void){ 569 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 570 if (!hci_stack->synchronous_flow_control_enabled) return 1; 571 return hci_number_free_sco_slots() > 0; 572 } 573 574 int hci_can_send_sco_packet_now(void){ 575 if (hci_stack->hci_packet_buffer_reserved) return 0; 576 return hci_can_send_prepared_sco_packet_now(); 577 } 578 579 void hci_request_sco_can_send_now_event(void){ 580 hci_stack->sco_waiting_for_can_send_now = 1; 581 hci_notify_if_sco_can_send_now(); 582 } 583 #endif 584 585 // used for internal checks in l2cap.c 586 int hci_is_packet_buffer_reserved(void){ 587 return hci_stack->hci_packet_buffer_reserved; 588 } 589 590 // reserves outgoing packet buffer. @returns 1 if successful 591 int hci_reserve_packet_buffer(void){ 592 if (hci_stack->hci_packet_buffer_reserved) { 593 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 594 return 0; 595 } 596 hci_stack->hci_packet_buffer_reserved = 1; 597 return 1; 598 } 599 600 void hci_release_packet_buffer(void){ 601 hci_stack->hci_packet_buffer_reserved = 0; 602 } 603 604 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 605 static int hci_transport_synchronous(void){ 606 return hci_stack->hci_transport->can_send_packet_now == NULL; 607 } 608 609 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 610 611 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 612 613 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 614 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 615 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 616 max_acl_data_packet_length = hci_stack->le_data_packets_length; 617 } 618 619 // testing: reduce buffer to minimum 620 // max_acl_data_packet_length = 52; 621 622 log_debug("hci_send_acl_packet_fragments entered"); 623 624 int err; 625 // multiple packets could be send on a synchronous HCI transport 626 while (1){ 627 628 log_debug("hci_send_acl_packet_fragments loop entered"); 629 630 // get current data 631 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 632 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 633 int more_fragments = 0; 634 635 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 636 if (current_acl_data_packet_length > max_acl_data_packet_length){ 637 more_fragments = 1; 638 current_acl_data_packet_length = max_acl_data_packet_length; 639 } 640 641 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 642 if (acl_header_pos > 0){ 643 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 644 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 645 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 646 } 647 648 // update header len 649 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 650 651 // count packet 652 connection->num_acl_packets_sent++; 653 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 654 655 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 656 if (more_fragments){ 657 // update start of next fragment to send 658 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 659 } else { 660 // done 661 hci_stack->acl_fragmentation_pos = 0; 662 hci_stack->acl_fragmentation_total_size = 0; 663 } 664 665 // send packet 666 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 667 const int size = current_acl_data_packet_length + 4; 668 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 669 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 670 671 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 672 673 // done yet? 674 if (!more_fragments) break; 675 676 // can send more? 677 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 678 } 679 680 log_debug("hci_send_acl_packet_fragments loop over"); 681 682 // release buffer now for synchronous transport 683 if (hci_transport_synchronous()){ 684 hci_release_packet_buffer(); 685 hci_emit_transport_packet_sent(); 686 } 687 688 return err; 689 } 690 691 // pre: caller has reserved the packet buffer 692 int hci_send_acl_packet_buffer(int size){ 693 694 // log_info("hci_send_acl_packet_buffer size %u", size); 695 696 if (!hci_stack->hci_packet_buffer_reserved) { 697 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 698 return 0; 699 } 700 701 uint8_t * packet = hci_stack->hci_packet_buffer; 702 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 703 704 // check for free places on Bluetooth module 705 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 706 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 707 hci_release_packet_buffer(); 708 hci_emit_transport_packet_sent(); 709 return BTSTACK_ACL_BUFFERS_FULL; 710 } 711 712 hci_connection_t *connection = hci_connection_for_handle( con_handle); 713 if (!connection) { 714 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 715 hci_release_packet_buffer(); 716 hci_emit_transport_packet_sent(); 717 return 0; 718 } 719 720 #ifdef ENABLE_CLASSIC 721 hci_connection_timestamp(connection); 722 #endif 723 724 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 725 726 // setup data 727 hci_stack->acl_fragmentation_total_size = size; 728 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 729 730 return hci_send_acl_packet_fragments(connection); 731 } 732 733 #ifdef ENABLE_CLASSIC 734 // pre: caller has reserved the packet buffer 735 int hci_send_sco_packet_buffer(int size){ 736 737 // log_info("hci_send_acl_packet_buffer size %u", size); 738 739 if (!hci_stack->hci_packet_buffer_reserved) { 740 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 741 return 0; 742 } 743 744 uint8_t * packet = hci_stack->hci_packet_buffer; 745 746 // skip checks in loopback mode 747 if (!hci_stack->loopback_mode){ 748 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 749 750 // check for free places on Bluetooth module 751 if (!hci_can_send_prepared_sco_packet_now()) { 752 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 753 hci_release_packet_buffer(); 754 hci_emit_transport_packet_sent(); 755 return BTSTACK_ACL_BUFFERS_FULL; 756 } 757 758 // track send packet in connection struct 759 hci_connection_t *connection = hci_connection_for_handle( con_handle); 760 if (!connection) { 761 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 762 hci_release_packet_buffer(); 763 hci_emit_transport_packet_sent(); 764 return 0; 765 } 766 connection->num_sco_packets_sent++; 767 } 768 769 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 770 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 771 772 if (hci_transport_synchronous()){ 773 hci_release_packet_buffer(); 774 hci_emit_transport_packet_sent(); 775 } 776 777 return err; 778 } 779 #endif 780 781 static void acl_handler(uint8_t *packet, int size){ 782 783 // log_info("acl_handler: size %u", size); 784 785 // get info 786 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 787 hci_connection_t *conn = hci_connection_for_handle(con_handle); 788 uint8_t acl_flags = READ_ACL_FLAGS(packet); 789 uint16_t acl_length = READ_ACL_LENGTH(packet); 790 791 // ignore non-registered handle 792 if (!conn){ 793 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 794 return; 795 } 796 797 // assert packet is complete 798 if (acl_length + 4 != size){ 799 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 800 return; 801 } 802 803 #ifdef ENABLE_CLASSIC 804 // update idle timestamp 805 hci_connection_timestamp(conn); 806 #endif 807 808 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 809 hci_stack->host_completed_packets = 1; 810 conn->num_packets_completed++; 811 #endif 812 813 // handle different packet types 814 switch (acl_flags & 0x03) { 815 816 case 0x01: // continuation fragment 817 818 // sanity checks 819 if (conn->acl_recombination_pos == 0) { 820 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 821 return; 822 } 823 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 824 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 825 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 826 conn->acl_recombination_pos = 0; 827 return; 828 } 829 830 // append fragment payload (header already stored) 831 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 832 conn->acl_recombination_pos += acl_length; 833 834 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 835 // conn->acl_recombination_pos, conn->acl_recombination_length); 836 837 // forward complete L2CAP packet if complete. 838 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 839 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 840 // reset recombination buffer 841 conn->acl_recombination_length = 0; 842 conn->acl_recombination_pos = 0; 843 } 844 break; 845 846 case 0x02: { // first fragment 847 848 // sanity check 849 if (conn->acl_recombination_pos) { 850 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 851 conn->acl_recombination_pos = 0; 852 } 853 854 // peek into L2CAP packet! 855 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 856 857 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 858 859 // compare fragment size to L2CAP packet size 860 if (acl_length >= l2cap_length + 4){ 861 // forward fragment as L2CAP packet 862 hci_emit_acl_packet(packet, acl_length + 4); 863 } else { 864 865 if (acl_length > HCI_ACL_BUFFER_SIZE){ 866 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 867 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 868 return; 869 } 870 871 // store first fragment and tweak acl length for complete package 872 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 873 conn->acl_recombination_pos = acl_length + 4; 874 conn->acl_recombination_length = l2cap_length; 875 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 876 } 877 break; 878 879 } 880 default: 881 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 882 return; 883 } 884 885 // execute main loop 886 hci_run(); 887 } 888 889 static void hci_shutdown_connection(hci_connection_t *conn){ 890 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 891 892 #ifdef ENABLE_CLASSIC 893 #ifdef ENABLE_SCO_OVER_HCI 894 int addr_type = conn->address_type; 895 #endif 896 #endif 897 898 btstack_run_loop_remove_timer(&conn->timeout); 899 900 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 901 btstack_memory_hci_connection_free( conn ); 902 903 // now it's gone 904 hci_emit_nr_connections_changed(); 905 906 #ifdef ENABLE_CLASSIC 907 #ifdef ENABLE_SCO_OVER_HCI 908 // update SCO 909 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 910 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 911 } 912 #endif 913 #endif 914 } 915 916 #ifdef ENABLE_CLASSIC 917 918 static const uint16_t packet_type_sizes[] = { 919 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 920 HCI_ACL_DH1_SIZE, 0, 0, 0, 921 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 922 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 923 }; 924 static const uint8_t packet_type_feature_requirement_bit[] = { 925 0, // 3 slot packets 926 1, // 5 slot packets 927 25, // EDR 2 mpbs 928 26, // EDR 3 mbps 929 39, // 3 slot EDR packts 930 40, // 5 slot EDR packet 931 }; 932 static const uint16_t packet_type_feature_packet_mask[] = { 933 0x0f00, // 3 slot packets 934 0xf000, // 5 slot packets 935 0x1102, // EDR 2 mpbs 936 0x2204, // EDR 3 mbps 937 0x0300, // 3 slot EDR packts 938 0x3000, // 5 slot EDR packet 939 }; 940 941 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 942 // enable packet types based on size 943 uint16_t packet_types = 0; 944 unsigned int i; 945 for (i=0;i<16;i++){ 946 if (packet_type_sizes[i] == 0) continue; 947 if (packet_type_sizes[i] <= buffer_size){ 948 packet_types |= 1 << i; 949 } 950 } 951 // disable packet types due to missing local supported features 952 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 953 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 954 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 955 if (feature_set) continue; 956 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 957 packet_types &= ~packet_type_feature_packet_mask[i]; 958 } 959 // flip bits for "may not be used" 960 packet_types ^= 0x3306; 961 return packet_types; 962 } 963 964 uint16_t hci_usable_acl_packet_types(void){ 965 return hci_stack->packet_types; 966 } 967 #endif 968 969 uint8_t* hci_get_outgoing_packet_buffer(void){ 970 // hci packet buffer is >= acl data packet length 971 return hci_stack->hci_packet_buffer; 972 } 973 974 uint16_t hci_max_acl_data_packet_length(void){ 975 return hci_stack->acl_data_packet_length; 976 } 977 978 #ifdef ENABLE_CLASSIC 979 int hci_extended_sco_link_supported(void){ 980 // No. 31, byte 3, bit 7 981 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 982 } 983 #endif 984 985 int hci_non_flushable_packet_boundary_flag_supported(void){ 986 // No. 54, byte 6, bit 6 987 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 988 } 989 990 static int gap_ssp_supported(void){ 991 // No. 51, byte 6, bit 3 992 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 993 } 994 995 static int hci_classic_supported(void){ 996 #ifdef ENABLE_CLASSIC 997 // No. 37, byte 4, bit 5, = No BR/EDR Support 998 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 999 #else 1000 return 0; 1001 #endif 1002 } 1003 1004 static int hci_le_supported(void){ 1005 #ifdef ENABLE_BLE 1006 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1007 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1008 #else 1009 return 0; 1010 #endif 1011 } 1012 1013 #ifdef ENABLE_BLE 1014 1015 /** 1016 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1017 */ 1018 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1019 *addr_type = hci_stack->le_own_addr_type; 1020 if (hci_stack->le_own_addr_type){ 1021 memcpy(addr, hci_stack->le_random_address, 6); 1022 } else { 1023 memcpy(addr, hci_stack->local_bd_addr, 6); 1024 } 1025 } 1026 1027 #ifdef ENABLE_LE_CENTRAL 1028 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1029 1030 int offset = 3; 1031 int num_reports = packet[offset]; 1032 offset += 1; 1033 1034 int i; 1035 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1036 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1037 for (i=0; i<num_reports && offset < size;i++){ 1038 uint8_t data_length = btstack_min( packet[offset + 8], LE_ADVERTISING_DATA_SIZE); 1039 uint8_t event_size = 10 + data_length; 1040 int pos = 0; 1041 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1042 event[pos++] = event_size; 1043 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 1044 offset += 8; 1045 pos += 8; 1046 event[pos++] = packet[offset + 1 + data_length]; // rssi 1047 event[pos++] = packet[offset++]; //data_length; 1048 memcpy(&event[pos], &packet[offset], data_length); 1049 pos += data_length; 1050 offset += data_length + 1; // rssi 1051 hci_emit_event(event, pos, 1); 1052 } 1053 } 1054 #endif 1055 #endif 1056 1057 #ifdef ENABLE_BLE 1058 #ifdef ENABLE_LE_PERIPHERAL 1059 static void hci_reenable_advertisements_if_needed(void){ 1060 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1061 // get number of active le slave connections 1062 int num_slave_connections = 0; 1063 btstack_linked_list_iterator_t it; 1064 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1065 while (btstack_linked_list_iterator_has_next(&it)){ 1066 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1067 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1068 if (con->state != OPEN) continue; 1069 if (con->role != HCI_ROLE_SLAVE) continue; 1070 if (!hci_is_le_connection(con)) continue; 1071 num_slave_connections++; 1072 } 1073 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1074 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1075 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1076 } 1077 } 1078 } 1079 #endif 1080 #endif 1081 1082 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1083 1084 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1085 if (!hci_stack->config) return 0; 1086 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1087 // Limit baud rate for Broadcom chipsets to 3 mbps 1088 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 1089 baud_rate = 3000000; 1090 } 1091 return baud_rate; 1092 } 1093 1094 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1095 UNUSED(ds); 1096 1097 switch (hci_stack->substate){ 1098 case HCI_INIT_W4_SEND_RESET: 1099 log_info("Resend HCI Reset"); 1100 hci_stack->substate = HCI_INIT_SEND_RESET; 1101 hci_stack->num_cmd_packets = 1; 1102 hci_run(); 1103 break; 1104 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1105 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1106 if (hci_stack->hci_transport->reset_link){ 1107 hci_stack->hci_transport->reset_link(); 1108 } 1109 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1110 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1111 log_info("Resend HCI Reset - CSR Warm Boot"); 1112 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1113 hci_stack->num_cmd_packets = 1; 1114 hci_run(); 1115 break; 1116 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1117 if (hci_stack->hci_transport->set_baudrate){ 1118 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1119 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1120 hci_stack->hci_transport->set_baudrate(baud_rate); 1121 } 1122 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1123 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1124 if (hci_stack->hci_transport->reset_link){ 1125 log_info("Link Reset"); 1126 hci_stack->hci_transport->reset_link(); 1127 } 1128 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1129 hci_run(); 1130 } 1131 break; 1132 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1133 // otherwise continue 1134 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1135 hci_send_cmd(&hci_read_local_supported_commands); 1136 break; 1137 default: 1138 break; 1139 } 1140 } 1141 #endif 1142 1143 static void hci_initializing_next_state(void){ 1144 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1145 } 1146 1147 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_PERIPHERAL) 1148 static void hci_replace_bd_addr_placeholder(uint8_t * data, uint16_t size){ 1149 const int bd_addr_string_len = 17; 1150 int i = 0; 1151 while (i < size - bd_addr_string_len){ 1152 if (memcmp(&data[i], "00:00:00:00:00:00", bd_addr_string_len)) { 1153 i++; 1154 continue; 1155 } 1156 // set real address 1157 memcpy(&data[i], bd_addr_to_str(hci_stack->local_bd_addr), bd_addr_string_len); 1158 i += bd_addr_string_len; 1159 } 1160 } 1161 #endif 1162 1163 // assumption: hci_can_send_command_packet_now() == true 1164 static void hci_initializing_run(void){ 1165 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1166 switch (hci_stack->substate){ 1167 case HCI_INIT_SEND_RESET: 1168 hci_state_reset(); 1169 1170 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1171 // prepare reset if command complete not received in 100ms 1172 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1173 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1174 btstack_run_loop_add_timer(&hci_stack->timeout); 1175 #endif 1176 // send command 1177 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1178 hci_send_cmd(&hci_reset); 1179 break; 1180 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1181 hci_send_cmd(&hci_read_local_version_information); 1182 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1183 break; 1184 case HCI_INIT_SEND_READ_LOCAL_NAME: 1185 hci_send_cmd(&hci_read_local_name); 1186 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1187 break; 1188 1189 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1190 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1191 hci_state_reset(); 1192 // prepare reset if command complete not received in 100ms 1193 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1194 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1195 btstack_run_loop_add_timer(&hci_stack->timeout); 1196 // send command 1197 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1198 hci_send_cmd(&hci_reset); 1199 break; 1200 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1201 hci_state_reset(); 1202 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1203 hci_send_cmd(&hci_reset); 1204 break; 1205 case HCI_INIT_SEND_BAUD_CHANGE: { 1206 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1207 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1208 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1209 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1210 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1211 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1212 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1213 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1214 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1215 btstack_run_loop_add_timer(&hci_stack->timeout); 1216 } 1217 break; 1218 } 1219 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1220 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1221 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1222 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1223 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1224 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1225 break; 1226 } 1227 case HCI_INIT_CUSTOM_INIT: 1228 // Custom initialization 1229 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1230 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1231 if (valid_cmd){ 1232 int size = 3 + hci_stack->hci_packet_buffer[2]; 1233 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1234 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1235 switch (valid_cmd) { 1236 case BTSTACK_CHIPSET_VALID_COMMAND: 1237 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1238 break; 1239 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1240 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1241 log_info("CSR Warm Boot"); 1242 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1243 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1244 btstack_run_loop_add_timer(&hci_stack->timeout); 1245 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1246 && hci_stack->config 1247 && hci_stack->chipset 1248 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1249 && hci_stack->hci_transport->set_baudrate 1250 && hci_transport_uart_get_main_baud_rate()){ 1251 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1252 } else { 1253 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1254 } 1255 break; 1256 default: 1257 // should not get here 1258 break; 1259 } 1260 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1261 break; 1262 } 1263 log_info("Init script done"); 1264 1265 // Init script download on Broadcom chipsets causes: 1266 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION 1267 || hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA){ 1268 1269 // - baud rate to reset, restore UART baud rate if needed 1270 int need_baud_change = hci_stack->config 1271 && hci_stack->chipset 1272 && hci_stack->chipset->set_baudrate_command 1273 && hci_stack->hci_transport->set_baudrate 1274 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1275 if (need_baud_change) { 1276 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1277 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1278 hci_stack->hci_transport->set_baudrate(baud_rate); 1279 } 1280 1281 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1282 // -> Work around: wait a few milliseconds here. 1283 log_info("BCM delay after init script"); 1284 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1285 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1286 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1287 btstack_run_loop_add_timer(&hci_stack->timeout); 1288 break; 1289 } 1290 } 1291 // otherwise continue 1292 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1293 hci_send_cmd(&hci_read_local_supported_commands); 1294 break; 1295 case HCI_INIT_SET_BD_ADDR: 1296 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1297 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1298 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1299 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1300 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1301 break; 1302 #endif 1303 1304 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1305 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1306 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1307 hci_send_cmd(&hci_read_local_supported_commands); 1308 break; 1309 case HCI_INIT_READ_BD_ADDR: 1310 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1311 hci_send_cmd(&hci_read_bd_addr); 1312 break; 1313 case HCI_INIT_READ_BUFFER_SIZE: 1314 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1315 hci_send_cmd(&hci_read_buffer_size); 1316 break; 1317 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1318 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1319 hci_send_cmd(&hci_read_local_supported_features); 1320 break; 1321 1322 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1323 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1324 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1325 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1326 break; 1327 case HCI_INIT_HOST_BUFFER_SIZE: 1328 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1329 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1330 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1331 break; 1332 #endif 1333 1334 case HCI_INIT_SET_EVENT_MASK: 1335 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1336 if (hci_le_supported()){ 1337 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1338 } else { 1339 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1340 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1341 } 1342 break; 1343 1344 #ifdef ENABLE_CLASSIC 1345 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1346 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1347 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1348 break; 1349 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1350 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1351 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1352 break; 1353 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1354 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1355 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1356 break; 1357 case HCI_INIT_WRITE_LOCAL_NAME: { 1358 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1359 hci_reserve_packet_buffer(); 1360 uint8_t * packet = hci_stack->hci_packet_buffer; 1361 // construct HCI Command and send 1362 uint16_t opcode = hci_write_local_name.opcode; 1363 hci_stack->last_cmd_opcode = opcode; 1364 packet[0] = opcode & 0xff; 1365 packet[1] = opcode >> 8; 1366 packet[2] = DEVICE_NAME_LEN; 1367 memset(&packet[3], 0, DEVICE_NAME_LEN); 1368 memcpy(&packet[3], hci_stack->local_name, strlen(hci_stack->local_name)); 1369 // expand '00:00:00:00:00:00' in name with bd_addr 1370 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1371 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1372 break; 1373 } 1374 case HCI_INIT_WRITE_EIR_DATA: { 1375 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1376 hci_reserve_packet_buffer(); 1377 uint8_t * packet = hci_stack->hci_packet_buffer; 1378 // construct HCI Command and send 1379 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1380 hci_stack->last_cmd_opcode = opcode; 1381 packet[0] = opcode & 0xff; 1382 packet[1] = opcode >> 8; 1383 packet[2] = 1 + 240; 1384 packet[3] = 0; // FEC not required 1385 if (hci_stack->eir_data){ 1386 memcpy(&packet[4], hci_stack->eir_data, 240); 1387 } else { 1388 memset(&packet[4], 0, 240); 1389 int name_len = strlen(hci_stack->local_name); 1390 packet[4] = name_len + 1; 1391 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1392 memcpy(&packet[6], hci_stack->local_name, name_len); 1393 } 1394 // expand '00:00:00:00:00:00' in name with bd_addr 1395 hci_replace_bd_addr_placeholder(&packet[4], 240); 1396 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1397 break; 1398 } 1399 case HCI_INIT_WRITE_INQUIRY_MODE: 1400 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1401 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1402 break; 1403 case HCI_INIT_WRITE_SCAN_ENABLE: 1404 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1405 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1406 break; 1407 // only sent if ENABLE_SCO_OVER_HCI is defined 1408 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1409 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1410 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1411 break; 1412 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1413 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1414 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1415 break; 1416 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1417 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1418 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1419 log_info("BCM: Route SCO data via HCI transport"); 1420 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1421 break; 1422 1423 #endif 1424 #ifdef ENABLE_BLE 1425 // LE INIT 1426 case HCI_INIT_LE_READ_BUFFER_SIZE: 1427 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1428 hci_send_cmd(&hci_le_read_buffer_size); 1429 break; 1430 case HCI_INIT_LE_SET_EVENT_MASK: 1431 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1432 hci_send_cmd(&hci_le_set_event_mask, 0x1FF, 0x0); 1433 break; 1434 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1435 // LE Supported Host = 1, Simultaneous Host = 0 1436 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1437 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1438 break; 1439 #endif 1440 1441 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1442 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1443 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1444 hci_send_cmd(&hci_le_read_maximum_data_length); 1445 break; 1446 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1447 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1448 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1449 break; 1450 #endif 1451 1452 #ifdef ENABLE_LE_CENTRAL 1453 case HCI_INIT_READ_WHITE_LIST_SIZE: 1454 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1455 hci_send_cmd(&hci_le_read_white_list_size); 1456 break; 1457 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1458 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1459 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1460 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1461 break; 1462 #endif 1463 default: 1464 return; 1465 } 1466 } 1467 1468 static void hci_init_done(void){ 1469 // done. tell the app 1470 log_info("hci_init_done -> HCI_STATE_WORKING"); 1471 hci_stack->state = HCI_STATE_WORKING; 1472 hci_emit_state(); 1473 hci_run(); 1474 } 1475 1476 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1477 1478 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1479 1480 uint8_t command_completed = 0; 1481 1482 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1483 uint16_t opcode = little_endian_read_16(packet,3); 1484 if (opcode == hci_stack->last_cmd_opcode){ 1485 command_completed = 1; 1486 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1487 } else { 1488 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1489 } 1490 } 1491 1492 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1493 uint8_t status = packet[2]; 1494 uint16_t opcode = little_endian_read_16(packet,4); 1495 if (opcode == hci_stack->last_cmd_opcode){ 1496 if (status){ 1497 command_completed = 1; 1498 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1499 } else { 1500 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1501 } 1502 } else { 1503 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1504 } 1505 } 1506 1507 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1508 1509 // Vendor == CSR 1510 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1511 // TODO: track actual command 1512 command_completed = 1; 1513 } 1514 1515 // Vendor == Toshiba 1516 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1517 // TODO: track actual command 1518 command_completed = 1; 1519 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1520 hci_stack->num_cmd_packets = 1; 1521 } 1522 1523 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1524 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1525 // 1526 // HCI Reset 1527 // Timeout 100 ms 1528 // HCI Reset 1529 // Command Complete Reset 1530 // HCI Read Local Version Information 1531 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1532 // hang... 1533 // 1534 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1535 if (!command_completed 1536 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1537 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1538 1539 uint16_t opcode = little_endian_read_16(packet,3); 1540 if (opcode == hci_reset.opcode){ 1541 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1542 return; 1543 } 1544 } 1545 1546 // CSR & H5 1547 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1548 if (!command_completed 1549 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1550 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1551 1552 uint16_t opcode = little_endian_read_16(packet,3); 1553 if (opcode == hci_reset.opcode){ 1554 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1555 return; 1556 } 1557 } 1558 1559 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1560 // fix: Correct substate and behave as command below 1561 if (command_completed){ 1562 switch (hci_stack->substate){ 1563 case HCI_INIT_SEND_RESET: 1564 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1565 break; 1566 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1567 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1568 break; 1569 default: 1570 break; 1571 } 1572 } 1573 1574 #endif 1575 1576 if (!command_completed) return; 1577 1578 int need_baud_change = 0; 1579 int need_addr_change = 0; 1580 1581 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1582 need_baud_change = hci_stack->config 1583 && hci_stack->chipset 1584 && hci_stack->chipset->set_baudrate_command 1585 && hci_stack->hci_transport->set_baudrate 1586 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1587 1588 need_addr_change = hci_stack->custom_bd_addr_set 1589 && hci_stack->chipset 1590 && hci_stack->chipset->set_bd_addr_command; 1591 #endif 1592 1593 switch(hci_stack->substate){ 1594 1595 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1596 case HCI_INIT_SEND_RESET: 1597 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1598 // fix: just correct substate and behave as command below 1599 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1600 btstack_run_loop_remove_timer(&hci_stack->timeout); 1601 break; 1602 case HCI_INIT_W4_SEND_RESET: 1603 btstack_run_loop_remove_timer(&hci_stack->timeout); 1604 break; 1605 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1606 log_info("Received local name, need baud change %d", need_baud_change); 1607 if (need_baud_change){ 1608 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1609 return; 1610 } 1611 // skip baud change 1612 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1613 return; 1614 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1615 // for STLC2500D, baud rate change already happened. 1616 // for others, baud rate gets changed now 1617 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1618 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1619 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1620 hci_stack->hci_transport->set_baudrate(baud_rate); 1621 } 1622 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1623 return; 1624 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1625 btstack_run_loop_remove_timer(&hci_stack->timeout); 1626 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1627 return; 1628 case HCI_INIT_W4_CUSTOM_INIT: 1629 // repeat custom init 1630 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1631 return; 1632 #else 1633 case HCI_INIT_W4_SEND_RESET: 1634 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1635 return ; 1636 #endif 1637 1638 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1639 if (need_baud_change && 1640 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1641 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1642 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1643 return; 1644 } 1645 if (need_addr_change){ 1646 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1647 return; 1648 } 1649 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1650 return; 1651 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1652 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1653 if (need_baud_change){ 1654 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1655 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1656 hci_stack->hci_transport->set_baudrate(baud_rate); 1657 } 1658 if (need_addr_change){ 1659 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1660 return; 1661 } 1662 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1663 return; 1664 case HCI_INIT_W4_SET_BD_ADDR: 1665 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1666 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1667 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1668 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1669 return; 1670 } 1671 // skipping st warm boot 1672 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1673 return; 1674 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1675 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1676 return; 1677 #endif 1678 case HCI_INIT_W4_READ_BD_ADDR: 1679 // only read buffer size if supported 1680 if (hci_stack->local_supported_commands[0] & 0x01) { 1681 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1682 return; 1683 } 1684 // skipping read buffer size 1685 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1686 return; 1687 case HCI_INIT_W4_SET_EVENT_MASK: 1688 // skip Classic init commands for LE only chipsets 1689 if (!hci_classic_supported()){ 1690 #ifdef ENABLE_BLE 1691 if (hci_le_supported()){ 1692 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1693 return; 1694 } 1695 #endif 1696 log_error("Neither BR/EDR nor LE supported"); 1697 hci_init_done(); 1698 return; 1699 } 1700 if (!gap_ssp_supported()){ 1701 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1702 return; 1703 } 1704 break; 1705 #ifdef ENABLE_BLE 1706 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1707 // skip write le host if not supported (e.g. on LE only EM9301) 1708 if (hci_stack->local_supported_commands[0] & 0x02) break; 1709 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1710 return; 1711 1712 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1713 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1714 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1715 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1716 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1717 return; 1718 } 1719 // explicit fall through to reduce repetitions 1720 1721 #ifdef ENABLE_LE_CENTRAL 1722 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1723 #else 1724 hci_init_done(); 1725 #endif 1726 return; 1727 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1728 1729 #endif /* ENABLE_BLE */ 1730 1731 #ifdef ENABLE_SCO_OVER_HCI 1732 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1733 // skip write synchronous flow control if not supported 1734 if (hci_stack->local_supported_commands[0] & 0x04) break; 1735 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1736 // explicit fall through to reduce repetitions 1737 1738 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1739 // skip write default erroneous data reporting if not supported 1740 if (hci_stack->local_supported_commands[0] & 0x08) break; 1741 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1742 // explicit fall through to reduce repetitions 1743 1744 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1745 // skip bcm set sco pcm config on non-Broadcom chipsets 1746 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1747 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1748 // explicit fall through to reduce repetitions 1749 1750 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1751 if (!hci_le_supported()){ 1752 // SKIP LE init for Classic only configuration 1753 hci_init_done(); 1754 return; 1755 } 1756 break; 1757 1758 #else /* !ENABLE_SCO_OVER_HCI */ 1759 1760 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1761 #ifdef ENABLE_BLE 1762 if (hci_le_supported()){ 1763 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1764 return; 1765 } 1766 #endif 1767 // SKIP LE init for Classic only configuration 1768 hci_init_done(); 1769 return; 1770 #endif /* ENABLE_SCO_OVER_HCI */ 1771 1772 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1773 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1774 // Response to command before init done state -> init done 1775 case (HCI_INIT_DONE-1): 1776 hci_init_done(); 1777 return; 1778 #endif 1779 1780 default: 1781 break; 1782 } 1783 hci_initializing_next_state(); 1784 } 1785 1786 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1787 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1788 bd_addr_t bd_address; 1789 memcpy(&bd_address, conn->address, 6); 1790 1791 #ifdef ENABLE_CLASSIC 1792 // cache needed data 1793 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1794 #endif 1795 1796 // connection failed, remove entry 1797 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1798 btstack_memory_hci_connection_free( conn ); 1799 1800 #ifdef ENABLE_CLASSIC 1801 // notify client if dedicated bonding 1802 if (notify_dedicated_bonding_failed){ 1803 log_info("hci notify_dedicated_bonding_failed"); 1804 hci_emit_dedicated_bonding_result(bd_address, status); 1805 } 1806 1807 // if authentication error, also delete link key 1808 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1809 gap_drop_link_key_for_bd_addr(bd_address); 1810 } 1811 #endif 1812 } 1813 1814 static void event_handler(uint8_t *packet, int size){ 1815 1816 uint16_t event_length = packet[1]; 1817 1818 // assert packet is complete 1819 if (size != event_length + 2){ 1820 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1821 return; 1822 } 1823 1824 bd_addr_t addr; 1825 bd_addr_type_t addr_type; 1826 hci_con_handle_t handle; 1827 hci_connection_t * conn; 1828 int i; 1829 #ifdef ENABLE_CLASSIC 1830 uint8_t link_type; 1831 #endif 1832 1833 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1834 1835 switch (hci_event_packet_get_type(packet)) { 1836 1837 case HCI_EVENT_COMMAND_COMPLETE: 1838 // get num cmd packets - limit to 1 to reduce complexity 1839 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1840 1841 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1842 if (packet[5]) break; 1843 // terminate, name 248 chars 1844 packet[6+248] = 0; 1845 log_info("local name: %s", &packet[6]); 1846 } 1847 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1848 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1849 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1850 uint16_t acl_len = little_endian_read_16(packet, 6); 1851 uint16_t sco_len = packet[8]; 1852 1853 // determine usable ACL/SCO payload size 1854 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1855 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1856 1857 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1858 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1859 1860 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1861 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1862 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1863 } 1864 } 1865 #ifdef ENABLE_BLE 1866 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1867 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1868 hci_stack->le_acl_packets_total_num = packet[8]; 1869 // determine usable ACL payload size 1870 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1871 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1872 } 1873 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1874 } 1875 #endif 1876 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1877 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1878 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1879 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1880 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); 1881 } 1882 #endif 1883 #ifdef ENABLE_LE_CENTRAL 1884 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1885 hci_stack->le_whitelist_capacity = packet[6]; 1886 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1887 } 1888 #endif 1889 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1890 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1891 hci_stack->local_bd_addr); 1892 log_info("Local Address, Status: 0x%02x: Addr: %s", 1893 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1894 #ifdef ENABLE_CLASSIC 1895 if (hci_stack->link_key_db){ 1896 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1897 } 1898 #endif 1899 } 1900 #ifdef ENABLE_CLASSIC 1901 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1902 hci_emit_discoverable_enabled(hci_stack->discoverable); 1903 } 1904 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1905 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1906 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1907 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1908 hci_emit_event(event, sizeof(event), 1); 1909 } 1910 } 1911 #endif 1912 1913 // Note: HCI init checks 1914 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1915 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1916 1917 #ifdef ENABLE_CLASSIC 1918 // determine usable ACL packet types based on host buffer size and supported features 1919 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1920 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1921 #endif 1922 // Classic/LE 1923 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1924 } 1925 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1926 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1927 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1928 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1929 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1930 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1931 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1932 } 1933 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1934 hci_stack->local_supported_commands[0] = 1935 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1936 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1937 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1938 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 1939 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 1940 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2; // bit 5 = Octet 35, bit 3 1941 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1942 } 1943 #ifdef ENABLE_CLASSIC 1944 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1945 if (packet[5] == 0){ 1946 hci_stack->synchronous_flow_control_enabled = 1; 1947 } 1948 } 1949 #endif 1950 break; 1951 1952 case HCI_EVENT_COMMAND_STATUS: 1953 // get num cmd packets - limit to 1 to reduce complexity 1954 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1955 1956 // check command status to detected failed outgoing connections 1957 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection) || 1958 HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)) { 1959 1960 uint8_t status = hci_event_command_status_get_status(packet); 1961 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 1962 log_info("command status (create connection), status %x, connection %p, addr %s, type %x", status, conn, bd_addr_to_str(hci_stack->outgoing_addr), hci_stack->outgoing_addr_type); 1963 1964 // reset outgoing address info 1965 memset(hci_stack->outgoing_addr, 0, 6); 1966 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 1967 1968 // error => outgoing connection failed 1969 if ((conn != NULL) && (status != 0)){ 1970 hci_handle_connection_failed(conn, status); 1971 } 1972 } 1973 break; 1974 1975 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1976 int offset = 3; 1977 for (i=0; i<packet[2];i++){ 1978 handle = little_endian_read_16(packet, offset) & 0x0fff; 1979 offset += 2; 1980 uint16_t num_packets = little_endian_read_16(packet, offset); 1981 offset += 2; 1982 1983 conn = hci_connection_for_handle(handle); 1984 if (!conn){ 1985 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1986 continue; 1987 } 1988 1989 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1990 #ifdef ENABLE_CLASSIC 1991 if (conn->num_sco_packets_sent >= num_packets){ 1992 conn->num_sco_packets_sent -= num_packets; 1993 } else { 1994 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1995 conn->num_sco_packets_sent = 0; 1996 } 1997 hci_notify_if_sco_can_send_now(); 1998 #endif 1999 } else { 2000 if (conn->num_acl_packets_sent >= num_packets){ 2001 conn->num_acl_packets_sent -= num_packets; 2002 } else { 2003 log_error("hci_number_completed_packets, more acl slots freed then sent."); 2004 conn->num_acl_packets_sent = 0; 2005 } 2006 } 2007 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 2008 } 2009 break; 2010 } 2011 2012 #ifdef ENABLE_CLASSIC 2013 case HCI_EVENT_INQUIRY_COMPLETE: 2014 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2015 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2016 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2017 hci_emit_event(event, sizeof(event), 1); 2018 } 2019 break; 2020 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2021 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2022 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2023 } 2024 break; 2025 case HCI_EVENT_CONNECTION_REQUEST: 2026 reverse_bd_addr(&packet[2], addr); 2027 // TODO: eval COD 8-10 2028 link_type = packet[11]; 2029 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2030 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 2031 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2032 if (!conn) { 2033 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2034 } 2035 if (!conn) { 2036 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2037 hci_stack->decline_reason = 0x0d; 2038 bd_addr_copy(hci_stack->decline_addr, addr); 2039 break; 2040 } 2041 conn->role = HCI_ROLE_SLAVE; 2042 conn->state = RECEIVED_CONNECTION_REQUEST; 2043 // store info about eSCO 2044 if (link_type == 0x02){ 2045 conn->remote_supported_feature_eSCO = 1; 2046 } 2047 hci_run(); 2048 break; 2049 2050 case HCI_EVENT_CONNECTION_COMPLETE: 2051 // Connection management 2052 reverse_bd_addr(&packet[5], addr); 2053 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2054 addr_type = BD_ADDR_TYPE_CLASSIC; 2055 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2056 if (conn) { 2057 if (!packet[2]){ 2058 conn->state = OPEN; 2059 conn->con_handle = little_endian_read_16(packet, 3); 2060 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2061 2062 // restart timer 2063 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2064 btstack_run_loop_add_timer(&conn->timeout); 2065 2066 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2067 2068 hci_emit_nr_connections_changed(); 2069 } else { 2070 // connection failed 2071 hci_handle_connection_failed(conn, packet[2]); 2072 } 2073 } 2074 break; 2075 2076 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2077 reverse_bd_addr(&packet[5], addr); 2078 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2079 if (packet[2]){ 2080 // connection failed 2081 break; 2082 } 2083 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2084 if (!conn) { 2085 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2086 } 2087 if (!conn) { 2088 break; 2089 } 2090 conn->state = OPEN; 2091 conn->con_handle = little_endian_read_16(packet, 3); 2092 2093 #ifdef ENABLE_SCO_OVER_HCI 2094 // update SCO 2095 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2096 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2097 } 2098 #endif 2099 break; 2100 2101 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2102 handle = little_endian_read_16(packet, 3); 2103 conn = hci_connection_for_handle(handle); 2104 if (!conn) break; 2105 if (!packet[2]){ 2106 uint8_t * features = &packet[5]; 2107 if (features[6] & (1 << 3)){ 2108 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2109 } 2110 if (features[3] & (1<<7)){ 2111 conn->remote_supported_feature_eSCO = 1; 2112 } 2113 } 2114 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2115 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2116 if (conn->bonding_flags & BONDING_DEDICATED){ 2117 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2118 } 2119 break; 2120 2121 case HCI_EVENT_LINK_KEY_REQUEST: 2122 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2123 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2124 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2125 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2126 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2127 hci_run(); 2128 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2129 return; 2130 2131 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2132 reverse_bd_addr(&packet[2], addr); 2133 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2134 if (!conn) break; 2135 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2136 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2137 // Change Connection Encryption keeps link key type 2138 if (link_key_type != CHANGED_COMBINATION_KEY){ 2139 conn->link_key_type = link_key_type; 2140 } 2141 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2142 // still forward event to allow dismiss of pairing dialog 2143 break; 2144 } 2145 2146 case HCI_EVENT_PIN_CODE_REQUEST: 2147 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2148 // non-bondable mode: pin code negative reply will be sent 2149 if (!hci_stack->bondable){ 2150 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2151 hci_run(); 2152 return; 2153 } 2154 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2155 if (!hci_stack->link_key_db) break; 2156 hci_event_pin_code_request_get_bd_addr(packet, addr); 2157 hci_stack->link_key_db->delete_link_key(addr); 2158 break; 2159 2160 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2161 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2162 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2163 break; 2164 2165 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2166 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2167 if (!hci_stack->ssp_auto_accept) break; 2168 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2169 break; 2170 2171 case HCI_EVENT_USER_PASSKEY_REQUEST: 2172 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2173 if (!hci_stack->ssp_auto_accept) break; 2174 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2175 break; 2176 #endif 2177 2178 case HCI_EVENT_ENCRYPTION_CHANGE: 2179 handle = little_endian_read_16(packet, 3); 2180 conn = hci_connection_for_handle(handle); 2181 if (!conn) break; 2182 if (packet[2] == 0) { 2183 if (packet[5]){ 2184 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2185 } else { 2186 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2187 } 2188 } 2189 #ifdef ENABLE_CLASSIC 2190 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2191 #endif 2192 break; 2193 2194 #ifdef ENABLE_CLASSIC 2195 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2196 handle = little_endian_read_16(packet, 3); 2197 conn = hci_connection_for_handle(handle); 2198 if (!conn) break; 2199 2200 // dedicated bonding: send result and disconnect 2201 if (conn->bonding_flags & BONDING_DEDICATED){ 2202 conn->bonding_flags &= ~BONDING_DEDICATED; 2203 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2204 conn->bonding_status = packet[2]; 2205 break; 2206 } 2207 2208 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2209 // link key sufficient for requested security 2210 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2211 break; 2212 } 2213 // not enough 2214 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2215 break; 2216 #endif 2217 2218 // HCI_EVENT_DISCONNECTION_COMPLETE 2219 // has been split, to first notify stack before shutting connection down 2220 // see end of function, too. 2221 case HCI_EVENT_DISCONNECTION_COMPLETE: 2222 if (packet[2]) break; // status != 0 2223 handle = little_endian_read_16(packet, 3); 2224 // drop outgoing ACL fragments if it is for closed connection 2225 if (hci_stack->acl_fragmentation_total_size > 0) { 2226 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2227 log_info("hci: drop fragmented ACL data for closed connection"); 2228 hci_stack->acl_fragmentation_total_size = 0; 2229 hci_stack->acl_fragmentation_pos = 0; 2230 } 2231 } 2232 2233 // re-enable advertisements for le connections if active 2234 conn = hci_connection_for_handle(handle); 2235 if (!conn) break; 2236 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2237 #ifdef ENABLE_BLE 2238 #ifdef ENABLE_LE_PERIPHERAL 2239 if (hci_is_le_connection(conn)){ 2240 hci_reenable_advertisements_if_needed(); 2241 } 2242 #endif 2243 #endif 2244 break; 2245 2246 case HCI_EVENT_HARDWARE_ERROR: 2247 log_error("Hardware Error: 0x%02x", packet[2]); 2248 if (hci_stack->hardware_error_callback){ 2249 (*hci_stack->hardware_error_callback)(packet[2]); 2250 } else { 2251 // if no special requests, just reboot stack 2252 hci_power_control_off(); 2253 hci_power_control_on(); 2254 } 2255 break; 2256 2257 #ifdef ENABLE_CLASSIC 2258 case HCI_EVENT_ROLE_CHANGE: 2259 if (packet[2]) break; // status != 0 2260 reverse_bd_addr(&packet[3], addr); 2261 addr_type = BD_ADDR_TYPE_CLASSIC; 2262 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2263 if (!conn) break; 2264 conn->role = packet[9]; 2265 break; 2266 #endif 2267 2268 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2269 // release packet buffer only for asynchronous transport and if there are not further fragements 2270 if (hci_transport_synchronous()) { 2271 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2272 return; // instead of break: to avoid re-entering hci_run() 2273 } 2274 if (hci_stack->acl_fragmentation_total_size) break; 2275 hci_release_packet_buffer(); 2276 2277 // L2CAP receives this event via the hci_emit_event below 2278 2279 #ifdef ENABLE_CLASSIC 2280 // For SCO, we do the can_send_now_check here 2281 hci_notify_if_sco_can_send_now(); 2282 #endif 2283 break; 2284 2285 #ifdef ENABLE_CLASSIC 2286 case HCI_EVENT_SCO_CAN_SEND_NOW: 2287 // For SCO, we do the can_send_now_check here 2288 hci_notify_if_sco_can_send_now(); 2289 return; 2290 2291 // explode inquriy results for easier consumption 2292 case HCI_EVENT_INQUIRY_RESULT: 2293 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2294 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2295 gap_inquiry_explode(packet); 2296 break; 2297 #endif 2298 2299 #ifdef ENABLE_BLE 2300 case HCI_EVENT_LE_META: 2301 switch (packet[2]){ 2302 #ifdef ENABLE_LE_CENTRAL 2303 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2304 // log_info("advertising report received"); 2305 if (!hci_stack->le_scanning_enabled) break; 2306 le_handle_advertisement_report(packet, size); 2307 break; 2308 #endif 2309 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2310 // Connection management 2311 reverse_bd_addr(&packet[8], addr); 2312 addr_type = (bd_addr_type_t)packet[7]; 2313 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2314 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2315 2316 #ifdef ENABLE_LE_CENTRAL 2317 // if auto-connect, remove from whitelist in both roles 2318 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2319 hci_remove_from_whitelist(addr_type, addr); 2320 } 2321 // handle error: error is reported only to the initiator -> outgoing connection 2322 if (packet[3]){ 2323 2324 // handle cancelled outgoing connection 2325 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2326 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2327 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2328 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2329 conn = gap_get_outgoing_connection(); 2330 } 2331 2332 // outgoing connection establishment is done 2333 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2334 // remove entry 2335 if (conn){ 2336 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2337 btstack_memory_hci_connection_free( conn ); 2338 } 2339 break; 2340 } 2341 #endif 2342 // on success, both hosts receive connection complete event 2343 if (packet[6] == HCI_ROLE_MASTER){ 2344 #ifdef ENABLE_LE_CENTRAL 2345 // if we're master, it was an outgoing connection and we're done with it 2346 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2347 #endif 2348 } else { 2349 #ifdef ENABLE_LE_PERIPHERAL 2350 // if we're slave, it was an incoming connection, advertisements have stopped 2351 hci_stack->le_advertisements_active = 0; 2352 #endif 2353 } 2354 // LE connections are auto-accepted, so just create a connection if there isn't one already 2355 if (!conn){ 2356 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2357 } 2358 // no memory, sorry. 2359 if (!conn){ 2360 break; 2361 } 2362 2363 conn->state = OPEN; 2364 conn->role = packet[6]; 2365 conn->con_handle = little_endian_read_16(packet, 4); 2366 2367 #ifdef ENABLE_LE_PERIPHERAL 2368 if (packet[6] == HCI_ROLE_SLAVE){ 2369 hci_reenable_advertisements_if_needed(); 2370 } 2371 #endif 2372 2373 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2374 2375 // restart timer 2376 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2377 // btstack_run_loop_add_timer(&conn->timeout); 2378 2379 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2380 2381 hci_emit_nr_connections_changed(); 2382 break; 2383 2384 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2385 2386 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2387 // connection 2388 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2389 conn = hci_connection_for_handle(handle); 2390 if (conn) { 2391 // read arguments 2392 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2393 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2394 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2395 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2396 2397 // validate against current connection parameter range 2398 le_connection_parameter_range_t existing_range; 2399 gap_get_connection_parameter_range(&existing_range); 2400 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2401 if (update_parameter){ 2402 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2403 conn->le_conn_interval_min = le_conn_interval_min; 2404 conn->le_conn_interval_max = le_conn_interval_max; 2405 conn->le_conn_latency = le_conn_latency; 2406 conn->le_supervision_timeout = le_supervision_timeout; 2407 } else { 2408 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2409 } 2410 } 2411 break; 2412 default: 2413 break; 2414 } 2415 break; 2416 #endif 2417 case HCI_EVENT_VENDOR_SPECIFIC: 2418 // Vendor specific commands often create vendor specific event instead of num completed packets 2419 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2420 switch (hci_stack->manufacturer){ 2421 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2422 hci_stack->num_cmd_packets = 1; 2423 break; 2424 default: 2425 break; 2426 } 2427 break; 2428 default: 2429 break; 2430 } 2431 2432 // handle BT initialization 2433 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2434 hci_initializing_event_handler(packet, size); 2435 } 2436 2437 // help with BT sleep 2438 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2439 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2440 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2441 hci_initializing_next_state(); 2442 } 2443 2444 // notify upper stack 2445 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2446 2447 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2448 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2449 if (!packet[2]){ 2450 handle = little_endian_read_16(packet, 3); 2451 hci_connection_t * aConn = hci_connection_for_handle(handle); 2452 if (aConn) { 2453 uint8_t status = aConn->bonding_status; 2454 uint16_t flags = aConn->bonding_flags; 2455 bd_addr_t bd_address; 2456 memcpy(&bd_address, aConn->address, 6); 2457 hci_shutdown_connection(aConn); 2458 // connection struct is gone, don't access anymore 2459 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2460 hci_emit_dedicated_bonding_result(bd_address, status); 2461 } 2462 } 2463 } 2464 } 2465 2466 // execute main loop 2467 hci_run(); 2468 } 2469 2470 #ifdef ENABLE_CLASSIC 2471 static void sco_handler(uint8_t * packet, uint16_t size){ 2472 if (!hci_stack->sco_packet_handler) return; 2473 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2474 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2475 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2476 hci_connection_t *conn = hci_connection_for_handle(con_handle); 2477 if (conn){ 2478 conn->num_packets_completed++; 2479 hci_stack->host_completed_packets = 1; 2480 hci_run(); 2481 } 2482 #endif 2483 } 2484 #endif 2485 2486 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2487 hci_dump_packet(packet_type, 1, packet, size); 2488 switch (packet_type) { 2489 case HCI_EVENT_PACKET: 2490 event_handler(packet, size); 2491 break; 2492 case HCI_ACL_DATA_PACKET: 2493 acl_handler(packet, size); 2494 break; 2495 #ifdef ENABLE_CLASSIC 2496 case HCI_SCO_DATA_PACKET: 2497 sco_handler(packet, size); 2498 break; 2499 #endif 2500 default: 2501 break; 2502 } 2503 } 2504 2505 /** 2506 * @brief Add event packet handler. 2507 */ 2508 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2509 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2510 } 2511 2512 2513 /** Register HCI packet handlers */ 2514 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2515 hci_stack->acl_packet_handler = handler; 2516 } 2517 2518 #ifdef ENABLE_CLASSIC 2519 /** 2520 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2521 */ 2522 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2523 hci_stack->sco_packet_handler = handler; 2524 } 2525 #endif 2526 2527 static void hci_state_reset(void){ 2528 // no connections yet 2529 hci_stack->connections = NULL; 2530 2531 // keep discoverable/connectable as this has been requested by the client(s) 2532 // hci_stack->discoverable = 0; 2533 // hci_stack->connectable = 0; 2534 // hci_stack->bondable = 1; 2535 // hci_stack->own_addr_type = 0; 2536 2537 // buffer is free 2538 hci_stack->hci_packet_buffer_reserved = 0; 2539 2540 // no pending cmds 2541 hci_stack->decline_reason = 0; 2542 hci_stack->new_scan_enable_value = 0xff; 2543 2544 // LE 2545 #ifdef ENABLE_BLE 2546 memset(hci_stack->le_random_address, 0, 6); 2547 hci_stack->le_random_address_set = 0; 2548 #endif 2549 #ifdef ENABLE_LE_CENTRAL 2550 hci_stack->le_scanning_active = 0; 2551 hci_stack->le_scan_type = 0xff; 2552 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2553 hci_stack->le_whitelist = 0; 2554 hci_stack->le_whitelist_capacity = 0; 2555 #endif 2556 } 2557 2558 #ifdef ENABLE_CLASSIC 2559 /** 2560 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2561 */ 2562 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2563 // store and open remote device db 2564 hci_stack->link_key_db = link_key_db; 2565 if (hci_stack->link_key_db) { 2566 hci_stack->link_key_db->open(); 2567 } 2568 } 2569 #endif 2570 2571 void hci_init(const hci_transport_t *transport, const void *config){ 2572 2573 #ifdef HAVE_MALLOC 2574 if (!hci_stack) { 2575 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2576 } 2577 #else 2578 hci_stack = &hci_stack_static; 2579 #endif 2580 memset(hci_stack, 0, sizeof(hci_stack_t)); 2581 2582 // reference to use transport layer implementation 2583 hci_stack->hci_transport = transport; 2584 2585 // reference to used config 2586 hci_stack->config = config; 2587 2588 // setup pointer for outgoing packet buffer 2589 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2590 2591 // max acl payload size defined in config.h 2592 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2593 2594 // register packet handlers with transport 2595 transport->register_packet_handler(&packet_handler); 2596 2597 hci_stack->state = HCI_STATE_OFF; 2598 2599 // class of device 2600 hci_stack->class_of_device = 0x007a020c; // Smartphone 2601 2602 // bondable by default 2603 hci_stack->bondable = 1; 2604 2605 #ifdef ENABLE_CLASSIC 2606 // classic name 2607 hci_stack->local_name = default_classic_name; 2608 2609 // Master slave policy 2610 hci_stack->master_slave_policy = 1; 2611 #endif 2612 2613 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2614 hci_stack->ssp_enable = 1; 2615 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2616 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2617 hci_stack->ssp_auto_accept = 1; 2618 2619 // voice setting - signed 16 bit pcm data with CVSD over the air 2620 hci_stack->sco_voice_setting = 0x60; 2621 2622 #ifdef ENABLE_LE_CENTRAL 2623 // connection parameter to use for outgoing connections 2624 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2625 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2626 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2627 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2628 hci_stack->le_connection_latency = 4; // 4 2629 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2630 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2631 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2632 #endif 2633 2634 #ifdef ENABLE_LE_PERIPHERAL 2635 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2636 #endif 2637 2638 // connection parameter range used to answer connection parameter update requests in l2cap 2639 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2640 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2641 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2642 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2643 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2644 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2645 2646 hci_state_reset(); 2647 } 2648 2649 /** 2650 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2651 */ 2652 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2653 hci_stack->chipset = chipset_driver; 2654 2655 // reset chipset driver - init is also called on power_up 2656 if (hci_stack->chipset && hci_stack->chipset->init){ 2657 hci_stack->chipset->init(hci_stack->config); 2658 } 2659 } 2660 2661 /** 2662 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2663 */ 2664 void hci_set_control(const btstack_control_t *hardware_control){ 2665 // references to used control implementation 2666 hci_stack->control = hardware_control; 2667 // init with transport config 2668 hardware_control->init(hci_stack->config); 2669 } 2670 2671 void hci_close(void){ 2672 // close remote device db 2673 if (hci_stack->link_key_db) { 2674 hci_stack->link_key_db->close(); 2675 } 2676 2677 btstack_linked_list_iterator_t lit; 2678 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2679 while (btstack_linked_list_iterator_has_next(&lit)){ 2680 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2681 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2682 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2683 hci_shutdown_connection(connection); 2684 } 2685 2686 hci_power_control(HCI_POWER_OFF); 2687 2688 #ifdef HAVE_MALLOC 2689 free(hci_stack); 2690 #endif 2691 hci_stack = NULL; 2692 } 2693 2694 #ifdef ENABLE_CLASSIC 2695 void gap_set_class_of_device(uint32_t class_of_device){ 2696 hci_stack->class_of_device = class_of_device; 2697 } 2698 2699 void hci_disable_l2cap_timeout_check(void){ 2700 disable_l2cap_timeouts = 1; 2701 } 2702 #endif 2703 2704 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2705 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2706 void hci_set_bd_addr(bd_addr_t addr){ 2707 memcpy(hci_stack->custom_bd_addr, addr, 6); 2708 hci_stack->custom_bd_addr_set = 1; 2709 } 2710 #endif 2711 2712 // State-Module-Driver overview 2713 // state module low-level 2714 // HCI_STATE_OFF off close 2715 // HCI_STATE_INITIALIZING, on open 2716 // HCI_STATE_WORKING, on open 2717 // HCI_STATE_HALTING, on open 2718 // HCI_STATE_SLEEPING, off/sleep close 2719 // HCI_STATE_FALLING_ASLEEP on open 2720 2721 static int hci_power_control_on(void){ 2722 2723 // power on 2724 int err = 0; 2725 if (hci_stack->control && hci_stack->control->on){ 2726 err = (*hci_stack->control->on)(); 2727 } 2728 if (err){ 2729 log_error( "POWER_ON failed"); 2730 hci_emit_hci_open_failed(); 2731 return err; 2732 } 2733 2734 // int chipset driver 2735 if (hci_stack->chipset && hci_stack->chipset->init){ 2736 hci_stack->chipset->init(hci_stack->config); 2737 } 2738 2739 // init transport 2740 if (hci_stack->hci_transport->init){ 2741 hci_stack->hci_transport->init(hci_stack->config); 2742 } 2743 2744 // open transport 2745 err = hci_stack->hci_transport->open(); 2746 if (err){ 2747 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2748 if (hci_stack->control && hci_stack->control->off){ 2749 (*hci_stack->control->off)(); 2750 } 2751 hci_emit_hci_open_failed(); 2752 return err; 2753 } 2754 return 0; 2755 } 2756 2757 static void hci_power_control_off(void){ 2758 2759 log_info("hci_power_control_off"); 2760 2761 // close low-level device 2762 hci_stack->hci_transport->close(); 2763 2764 log_info("hci_power_control_off - hci_transport closed"); 2765 2766 // power off 2767 if (hci_stack->control && hci_stack->control->off){ 2768 (*hci_stack->control->off)(); 2769 } 2770 2771 log_info("hci_power_control_off - control closed"); 2772 2773 hci_stack->state = HCI_STATE_OFF; 2774 } 2775 2776 static void hci_power_control_sleep(void){ 2777 2778 log_info("hci_power_control_sleep"); 2779 2780 #if 0 2781 // don't close serial port during sleep 2782 2783 // close low-level device 2784 hci_stack->hci_transport->close(hci_stack->config); 2785 #endif 2786 2787 // sleep mode 2788 if (hci_stack->control && hci_stack->control->sleep){ 2789 (*hci_stack->control->sleep)(); 2790 } 2791 2792 hci_stack->state = HCI_STATE_SLEEPING; 2793 } 2794 2795 static int hci_power_control_wake(void){ 2796 2797 log_info("hci_power_control_wake"); 2798 2799 // wake on 2800 if (hci_stack->control && hci_stack->control->wake){ 2801 (*hci_stack->control->wake)(); 2802 } 2803 2804 #if 0 2805 // open low-level device 2806 int err = hci_stack->hci_transport->open(hci_stack->config); 2807 if (err){ 2808 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2809 if (hci_stack->control && hci_stack->control->off){ 2810 (*hci_stack->control->off)(); 2811 } 2812 hci_emit_hci_open_failed(); 2813 return err; 2814 } 2815 #endif 2816 2817 return 0; 2818 } 2819 2820 static void hci_power_transition_to_initializing(void){ 2821 // set up state machine 2822 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2823 hci_stack->hci_packet_buffer_reserved = 0; 2824 hci_stack->state = HCI_STATE_INITIALIZING; 2825 hci_stack->substate = HCI_INIT_SEND_RESET; 2826 } 2827 2828 int hci_power_control(HCI_POWER_MODE power_mode){ 2829 2830 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2831 2832 int err = 0; 2833 switch (hci_stack->state){ 2834 2835 case HCI_STATE_OFF: 2836 switch (power_mode){ 2837 case HCI_POWER_ON: 2838 err = hci_power_control_on(); 2839 if (err) { 2840 log_error("hci_power_control_on() error %d", err); 2841 return err; 2842 } 2843 hci_power_transition_to_initializing(); 2844 break; 2845 case HCI_POWER_OFF: 2846 // do nothing 2847 break; 2848 case HCI_POWER_SLEEP: 2849 // do nothing (with SLEEP == OFF) 2850 break; 2851 } 2852 break; 2853 2854 case HCI_STATE_INITIALIZING: 2855 switch (power_mode){ 2856 case HCI_POWER_ON: 2857 // do nothing 2858 break; 2859 case HCI_POWER_OFF: 2860 // no connections yet, just turn it off 2861 hci_power_control_off(); 2862 break; 2863 case HCI_POWER_SLEEP: 2864 // no connections yet, just turn it off 2865 hci_power_control_sleep(); 2866 break; 2867 } 2868 break; 2869 2870 case HCI_STATE_WORKING: 2871 switch (power_mode){ 2872 case HCI_POWER_ON: 2873 // do nothing 2874 break; 2875 case HCI_POWER_OFF: 2876 // see hci_run 2877 hci_stack->state = HCI_STATE_HALTING; 2878 break; 2879 case HCI_POWER_SLEEP: 2880 // see hci_run 2881 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2882 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2883 break; 2884 } 2885 break; 2886 2887 case HCI_STATE_HALTING: 2888 switch (power_mode){ 2889 case HCI_POWER_ON: 2890 hci_power_transition_to_initializing(); 2891 break; 2892 case HCI_POWER_OFF: 2893 // do nothing 2894 break; 2895 case HCI_POWER_SLEEP: 2896 // see hci_run 2897 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2898 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2899 break; 2900 } 2901 break; 2902 2903 case HCI_STATE_FALLING_ASLEEP: 2904 switch (power_mode){ 2905 case HCI_POWER_ON: 2906 2907 #ifdef HAVE_PLATFORM_IPHONE_OS 2908 // nothing to do, if H4 supports power management 2909 if (btstack_control_iphone_power_management_enabled()){ 2910 hci_stack->state = HCI_STATE_INITIALIZING; 2911 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2912 break; 2913 } 2914 #endif 2915 hci_power_transition_to_initializing(); 2916 break; 2917 case HCI_POWER_OFF: 2918 // see hci_run 2919 hci_stack->state = HCI_STATE_HALTING; 2920 break; 2921 case HCI_POWER_SLEEP: 2922 // do nothing 2923 break; 2924 } 2925 break; 2926 2927 case HCI_STATE_SLEEPING: 2928 switch (power_mode){ 2929 case HCI_POWER_ON: 2930 2931 #ifdef HAVE_PLATFORM_IPHONE_OS 2932 // nothing to do, if H4 supports power management 2933 if (btstack_control_iphone_power_management_enabled()){ 2934 hci_stack->state = HCI_STATE_INITIALIZING; 2935 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2936 hci_update_scan_enable(); 2937 break; 2938 } 2939 #endif 2940 err = hci_power_control_wake(); 2941 if (err) return err; 2942 hci_power_transition_to_initializing(); 2943 break; 2944 case HCI_POWER_OFF: 2945 hci_stack->state = HCI_STATE_HALTING; 2946 break; 2947 case HCI_POWER_SLEEP: 2948 // do nothing 2949 break; 2950 } 2951 break; 2952 } 2953 2954 // create internal event 2955 hci_emit_state(); 2956 2957 // trigger next/first action 2958 hci_run(); 2959 2960 return 0; 2961 } 2962 2963 2964 #ifdef ENABLE_CLASSIC 2965 2966 static void hci_update_scan_enable(void){ 2967 // 2 = page scan, 1 = inq scan 2968 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2969 hci_run(); 2970 } 2971 2972 void gap_discoverable_control(uint8_t enable){ 2973 if (enable) enable = 1; // normalize argument 2974 2975 if (hci_stack->discoverable == enable){ 2976 hci_emit_discoverable_enabled(hci_stack->discoverable); 2977 return; 2978 } 2979 2980 hci_stack->discoverable = enable; 2981 hci_update_scan_enable(); 2982 } 2983 2984 void gap_connectable_control(uint8_t enable){ 2985 if (enable) enable = 1; // normalize argument 2986 2987 // don't emit event 2988 if (hci_stack->connectable == enable) return; 2989 2990 hci_stack->connectable = enable; 2991 hci_update_scan_enable(); 2992 } 2993 #endif 2994 2995 void gap_local_bd_addr(bd_addr_t address_buffer){ 2996 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2997 } 2998 2999 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3000 static void hci_host_num_completed_packets(void){ 3001 3002 // create packet manually as arrays are not supported and num_commands should not get reduced 3003 hci_reserve_packet_buffer(); 3004 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3005 3006 uint16_t size = 0; 3007 uint16_t num_handles = 0; 3008 packet[size++] = 0x35; 3009 packet[size++] = 0x0c; 3010 size++; // skip param len 3011 size++; // skip num handles 3012 3013 // add { handle, packets } entries 3014 btstack_linked_item_t * it; 3015 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3016 hci_connection_t * connection = (hci_connection_t *) it; 3017 if (connection->num_packets_completed){ 3018 little_endian_store_16(packet, size, connection->con_handle); 3019 size += 2; 3020 little_endian_store_16(packet, size, connection->num_packets_completed); 3021 size += 2; 3022 // 3023 num_handles++; 3024 connection->num_packets_completed = 0; 3025 } 3026 } 3027 3028 packet[2] = size - 3; 3029 packet[3] = num_handles; 3030 3031 hci_stack->host_completed_packets = 0; 3032 3033 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3034 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3035 3036 // release packet buffer for synchronous transport implementations 3037 if (hci_transport_synchronous()){ 3038 hci_release_packet_buffer(); 3039 hci_emit_transport_packet_sent(); 3040 } 3041 } 3042 #endif 3043 3044 static void hci_run(void){ 3045 3046 // log_info("hci_run: entered"); 3047 btstack_linked_item_t * it; 3048 3049 // send continuation fragments first, as they block the prepared packet buffer 3050 if (hci_stack->acl_fragmentation_total_size > 0) { 3051 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3052 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3053 if (connection) { 3054 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3055 hci_send_acl_packet_fragments(connection); 3056 return; 3057 } 3058 } else { 3059 // connection gone -> discard further fragments 3060 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3061 hci_stack->acl_fragmentation_total_size = 0; 3062 hci_stack->acl_fragmentation_pos = 0; 3063 } 3064 } 3065 3066 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3067 // send host num completed packets next as they don't require num_cmd_packets > 0 3068 if (!hci_can_send_comand_packet_transport()) return; 3069 if (hci_stack->host_completed_packets){ 3070 hci_host_num_completed_packets(); 3071 return; 3072 } 3073 #endif 3074 3075 if (!hci_can_send_command_packet_now()) return; 3076 3077 // global/non-connection oriented commands 3078 3079 #ifdef ENABLE_CLASSIC 3080 // decline incoming connections 3081 if (hci_stack->decline_reason){ 3082 uint8_t reason = hci_stack->decline_reason; 3083 hci_stack->decline_reason = 0; 3084 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3085 return; 3086 } 3087 // send scan enable 3088 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 3089 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3090 hci_stack->new_scan_enable_value = 0xff; 3091 return; 3092 } 3093 // start/stop inquiry 3094 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 3095 uint8_t duration = hci_stack->inquiry_state; 3096 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3097 hci_send_cmd(&hci_inquiry, HCI_INQUIRY_LAP, duration, 0); 3098 return; 3099 } 3100 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3101 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3102 hci_send_cmd(&hci_inquiry_cancel); 3103 return; 3104 } 3105 // remote name request 3106 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3107 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3108 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3109 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3110 return; 3111 } 3112 // pairing 3113 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3114 uint8_t state = hci_stack->gap_pairing_state; 3115 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3116 switch (state){ 3117 case GAP_PAIRING_STATE_SEND_PIN: 3118 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); 3119 break; 3120 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3121 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3122 break; 3123 case GAP_PAIRING_STATE_SEND_PASSKEY: 3124 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3125 break; 3126 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3127 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3128 break; 3129 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3130 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3131 break; 3132 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3133 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3134 break; 3135 default: 3136 break; 3137 } 3138 return; 3139 } 3140 #endif 3141 3142 #ifdef ENABLE_BLE 3143 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 3144 if ((hci_stack->state == HCI_STATE_WORKING) 3145 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 3146 3147 #ifdef ENABLE_LE_CENTRAL 3148 // handle le scan 3149 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3150 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3151 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3152 return; 3153 } 3154 if (hci_stack->le_scan_type != 0xff){ 3155 // defaults: active scanning, accept all advertisement packets 3156 int scan_type = hci_stack->le_scan_type; 3157 hci_stack->le_scan_type = 0xff; 3158 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); 3159 return; 3160 } 3161 #endif 3162 #ifdef ENABLE_LE_PERIPHERAL 3163 // le advertisement control 3164 if (hci_stack->le_advertisements_todo){ 3165 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3166 } 3167 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3168 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3169 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3170 return; 3171 } 3172 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3173 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3174 hci_send_cmd(&hci_le_set_advertising_parameters, 3175 hci_stack->le_advertisements_interval_min, 3176 hci_stack->le_advertisements_interval_max, 3177 hci_stack->le_advertisements_type, 3178 hci_stack->le_own_addr_type, 3179 hci_stack->le_advertisements_direct_address_type, 3180 hci_stack->le_advertisements_direct_address, 3181 hci_stack->le_advertisements_channel_map, 3182 hci_stack->le_advertisements_filter_policy); 3183 return; 3184 } 3185 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3186 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3187 uint8_t adv_data_clean[31]; 3188 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3189 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3190 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3191 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3192 return; 3193 } 3194 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3195 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3196 uint8_t scan_data_clean[31]; 3197 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3198 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3199 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3200 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, hci_stack->le_scan_response_data); 3201 return; 3202 } 3203 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3204 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3205 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3206 return; 3207 } 3208 #endif 3209 3210 #ifdef ENABLE_LE_CENTRAL 3211 // 3212 // LE Whitelist Management 3213 // 3214 3215 // check if whitelist needs modification 3216 btstack_linked_list_iterator_t lit; 3217 int modification_pending = 0; 3218 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3219 while (btstack_linked_list_iterator_has_next(&lit)){ 3220 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3221 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3222 modification_pending = 1; 3223 break; 3224 } 3225 } 3226 3227 if (modification_pending){ 3228 // stop connnecting if modification pending 3229 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3230 hci_send_cmd(&hci_le_create_connection_cancel); 3231 return; 3232 } 3233 3234 // add/remove entries 3235 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3236 while (btstack_linked_list_iterator_has_next(&lit)){ 3237 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3238 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3239 entry->state = LE_WHITELIST_ON_CONTROLLER; 3240 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3241 return; 3242 3243 } 3244 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3245 bd_addr_t address; 3246 bd_addr_type_t address_type = entry->address_type; 3247 memcpy(address, entry->address, 6); 3248 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3249 btstack_memory_whitelist_entry_free(entry); 3250 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3251 return; 3252 } 3253 } 3254 } 3255 3256 // start connecting 3257 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3258 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3259 bd_addr_t null_addr; 3260 memset(null_addr, 0, 6); 3261 hci_send_cmd(&hci_le_create_connection, 3262 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3263 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3264 1, // use whitelist 3265 0, // peer address type 3266 null_addr, // peer bd addr 3267 hci_stack->le_own_addr_type, // our addr type: 3268 hci_stack->le_connection_interval_min, // conn interval min 3269 hci_stack->le_connection_interval_max, // conn interval max 3270 hci_stack->le_connection_latency, // conn latency 3271 hci_stack->le_supervision_timeout, // conn latency 3272 hci_stack->le_minimum_ce_length, // min ce length 3273 hci_stack->le_maximum_ce_length // max ce length 3274 ); 3275 return; 3276 } 3277 #endif 3278 } 3279 #endif 3280 3281 // send pending HCI commands 3282 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3283 hci_connection_t * connection = (hci_connection_t *) it; 3284 3285 switch(connection->state){ 3286 case SEND_CREATE_CONNECTION: 3287 switch(connection->address_type){ 3288 #ifdef ENABLE_CLASSIC 3289 case BD_ADDR_TYPE_CLASSIC: 3290 log_info("sending hci_create_connection"); 3291 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3292 break; 3293 #endif 3294 default: 3295 #ifdef ENABLE_BLE 3296 #ifdef ENABLE_LE_CENTRAL 3297 // track outgoing connection 3298 hci_stack->outgoing_addr_type = connection->address_type; 3299 memcpy(hci_stack->outgoing_addr, connection->address, 6); 3300 log_info("sending hci_le_create_connection"); 3301 hci_send_cmd(&hci_le_create_connection, 3302 hci_stack->le_connection_scan_interval, // conn scan interval 3303 hci_stack->le_connection_scan_window, // conn scan windows 3304 0, // don't use whitelist 3305 connection->address_type, // peer address type 3306 connection->address, // peer bd addr 3307 hci_stack->le_own_addr_type, // our addr type: 3308 hci_stack->le_connection_interval_min, // conn interval min 3309 hci_stack->le_connection_interval_max, // conn interval max 3310 hci_stack->le_connection_latency, // conn latency 3311 hci_stack->le_supervision_timeout, // conn latency 3312 hci_stack->le_minimum_ce_length, // min ce length 3313 hci_stack->le_maximum_ce_length // max ce length 3314 ); 3315 connection->state = SENT_CREATE_CONNECTION; 3316 #endif 3317 #endif 3318 break; 3319 } 3320 return; 3321 3322 #ifdef ENABLE_CLASSIC 3323 case RECEIVED_CONNECTION_REQUEST: 3324 connection->role = HCI_ROLE_SLAVE; 3325 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3326 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3327 connection->state = ACCEPTED_CONNECTION_REQUEST; 3328 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3329 } 3330 return; 3331 #endif 3332 3333 #ifdef ENABLE_BLE 3334 #ifdef ENABLE_LE_CENTRAL 3335 case SEND_CANCEL_CONNECTION: 3336 connection->state = SENT_CANCEL_CONNECTION; 3337 hci_send_cmd(&hci_le_create_connection_cancel); 3338 return; 3339 #endif 3340 #endif 3341 case SEND_DISCONNECT: 3342 connection->state = SENT_DISCONNECT; 3343 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3344 return; 3345 3346 default: 3347 break; 3348 } 3349 3350 #ifdef ENABLE_CLASSIC 3351 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3352 log_info("responding to link key request"); 3353 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3354 link_key_t link_key; 3355 link_key_type_t link_key_type; 3356 if ( hci_stack->link_key_db 3357 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3358 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3359 connection->link_key_type = link_key_type; 3360 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3361 } else { 3362 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3363 } 3364 return; 3365 } 3366 3367 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3368 log_info("denying to pin request"); 3369 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3370 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3371 return; 3372 } 3373 3374 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3375 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3376 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3377 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3378 // tweak authentication requirements 3379 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3380 if (connection->bonding_flags & BONDING_DEDICATED){ 3381 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3382 } 3383 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3384 authreq |= 1; 3385 } 3386 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3387 } else { 3388 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3389 } 3390 return; 3391 } 3392 3393 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3394 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3395 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3396 return; 3397 } 3398 3399 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3400 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3401 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3402 return; 3403 } 3404 3405 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3406 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3407 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3408 return; 3409 } 3410 3411 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3412 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3413 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3414 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3415 return; 3416 } 3417 3418 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3419 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3420 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3421 return; 3422 } 3423 3424 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3425 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3426 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3427 return; 3428 } 3429 #endif 3430 3431 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3432 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3433 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3434 return; 3435 } 3436 3437 #ifdef ENABLE_BLE 3438 switch (connection->le_con_parameter_update_state){ 3439 // response to L2CAP CON PARAMETER UPDATE REQUEST 3440 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3441 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3442 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3443 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3444 0x0000, 0xffff); 3445 break; 3446 case CON_PARAMETER_UPDATE_REPLY: 3447 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3448 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3449 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3450 0x0000, 0xffff); 3451 break; 3452 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3453 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3454 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3455 break; 3456 default: 3457 break; 3458 } 3459 #endif 3460 } 3461 3462 hci_connection_t * connection; 3463 switch (hci_stack->state){ 3464 case HCI_STATE_INITIALIZING: 3465 hci_initializing_run(); 3466 break; 3467 3468 case HCI_STATE_HALTING: 3469 3470 log_info("HCI_STATE_HALTING"); 3471 3472 // free whitelist entries 3473 #ifdef ENABLE_BLE 3474 #ifdef ENABLE_LE_CENTRAL 3475 { 3476 btstack_linked_list_iterator_t lit; 3477 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3478 while (btstack_linked_list_iterator_has_next(&lit)){ 3479 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3480 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3481 btstack_memory_whitelist_entry_free(entry); 3482 } 3483 } 3484 #endif 3485 #endif 3486 // close all open connections 3487 connection = (hci_connection_t *) hci_stack->connections; 3488 if (connection){ 3489 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3490 if (!hci_can_send_command_packet_now()) return; 3491 3492 // check state 3493 if (connection->state == SENT_DISCONNECT) return; 3494 connection->state = SENT_DISCONNECT; 3495 3496 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3497 3498 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3499 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3500 3501 // ... which would be ignored anyway as we shutdown (free) the connection now 3502 hci_shutdown_connection(connection); 3503 3504 // finally, send the disconnect command 3505 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3506 return; 3507 } 3508 log_info("HCI_STATE_HALTING, calling off"); 3509 3510 // switch mode 3511 hci_power_control_off(); 3512 3513 log_info("HCI_STATE_HALTING, emitting state"); 3514 hci_emit_state(); 3515 log_info("HCI_STATE_HALTING, done"); 3516 break; 3517 3518 case HCI_STATE_FALLING_ASLEEP: 3519 switch(hci_stack->substate) { 3520 case HCI_FALLING_ASLEEP_DISCONNECT: 3521 log_info("HCI_STATE_FALLING_ASLEEP"); 3522 // close all open connections 3523 connection = (hci_connection_t *) hci_stack->connections; 3524 3525 #ifdef HAVE_PLATFORM_IPHONE_OS 3526 // don't close connections, if H4 supports power management 3527 if (btstack_control_iphone_power_management_enabled()){ 3528 connection = NULL; 3529 } 3530 #endif 3531 if (connection){ 3532 3533 // send disconnect 3534 if (!hci_can_send_command_packet_now()) return; 3535 3536 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3537 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3538 3539 // send disconnected event right away - causes higher layer connections to get closed, too. 3540 hci_shutdown_connection(connection); 3541 return; 3542 } 3543 3544 if (hci_classic_supported()){ 3545 // disable page and inquiry scan 3546 if (!hci_can_send_command_packet_now()) return; 3547 3548 log_info("HCI_STATE_HALTING, disabling inq scans"); 3549 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3550 3551 // continue in next sub state 3552 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3553 break; 3554 } 3555 // no break - fall through for ble-only chips 3556 3557 case HCI_FALLING_ASLEEP_COMPLETE: 3558 log_info("HCI_STATE_HALTING, calling sleep"); 3559 #ifdef HAVE_PLATFORM_IPHONE_OS 3560 // don't actually go to sleep, if H4 supports power management 3561 if (btstack_control_iphone_power_management_enabled()){ 3562 // SLEEP MODE reached 3563 hci_stack->state = HCI_STATE_SLEEPING; 3564 hci_emit_state(); 3565 break; 3566 } 3567 #endif 3568 // switch mode 3569 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3570 hci_emit_state(); 3571 break; 3572 3573 default: 3574 break; 3575 } 3576 break; 3577 3578 default: 3579 break; 3580 } 3581 } 3582 3583 int hci_send_cmd_packet(uint8_t *packet, int size){ 3584 // house-keeping 3585 3586 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3587 hci_stack->loopback_mode = packet[3]; 3588 } 3589 3590 #ifdef ENABLE_CLASSIC 3591 bd_addr_t addr; 3592 hci_connection_t * conn; 3593 3594 // create_connection? 3595 if (IS_COMMAND(packet, hci_create_connection)){ 3596 reverse_bd_addr(&packet[3], addr); 3597 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3598 3599 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3600 if (!conn){ 3601 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3602 if (!conn){ 3603 // notify client that alloc failed 3604 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3605 return -1; // packet not sent to controller 3606 } 3607 conn->state = SEND_CREATE_CONNECTION; 3608 } 3609 log_info("conn state %u", conn->state); 3610 switch (conn->state){ 3611 // if connection active exists 3612 case OPEN: 3613 // and OPEN, emit connection complete command 3614 hci_emit_connection_complete(addr, conn->con_handle, 0); 3615 return -1; // packet not sent to controller 3616 case SEND_CREATE_CONNECTION: 3617 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 3618 break; 3619 default: 3620 // otherwise, just ignore as it is already in the open process 3621 return -1; // packet not sent to controller 3622 } 3623 conn->state = SENT_CREATE_CONNECTION; 3624 3625 // track outgoing connection 3626 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_CLASSIC; 3627 memcpy(hci_stack->outgoing_addr, addr, 6); 3628 } 3629 3630 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3631 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3632 } 3633 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3634 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3635 } 3636 3637 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3638 if (hci_stack->link_key_db){ 3639 reverse_bd_addr(&packet[3], addr); 3640 hci_stack->link_key_db->delete_link_key(addr); 3641 } 3642 } 3643 3644 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3645 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3646 reverse_bd_addr(&packet[3], addr); 3647 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3648 if (conn){ 3649 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3650 } 3651 } 3652 3653 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3654 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3655 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3656 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3657 reverse_bd_addr(&packet[3], addr); 3658 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3659 if (conn){ 3660 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3661 } 3662 } 3663 3664 #ifdef ENABLE_SCO_OVER_HCI 3665 // setup_synchronous_connection? Voice setting at offset 22 3666 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3667 // TODO: compare to current setting if sco connection already active 3668 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3669 } 3670 // accept_synchronus_connection? Voice setting at offset 18 3671 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3672 // TODO: compare to current setting if sco connection already active 3673 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3674 } 3675 #endif 3676 #endif 3677 3678 #ifdef ENABLE_BLE 3679 #ifdef ENABLE_LE_PERIPHERAL 3680 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3681 hci_stack->le_random_address_set = 1; 3682 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3683 } 3684 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3685 hci_stack->le_advertisements_active = packet[3]; 3686 } 3687 #endif 3688 #ifdef ENABLE_LE_CENTRAL 3689 if (IS_COMMAND(packet, hci_le_create_connection)){ 3690 // white list used? 3691 uint8_t initiator_filter_policy = packet[7]; 3692 switch (initiator_filter_policy){ 3693 case 0: 3694 // whitelist not used 3695 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3696 break; 3697 case 1: 3698 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3699 break; 3700 default: 3701 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3702 break; 3703 } 3704 } 3705 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3706 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3707 } 3708 #endif 3709 #endif 3710 3711 hci_stack->num_cmd_packets--; 3712 3713 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3714 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3715 } 3716 3717 // disconnect because of security block 3718 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3719 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3720 if (!connection) return; 3721 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3722 } 3723 3724 3725 // Configure Secure Simple Pairing 3726 3727 #ifdef ENABLE_CLASSIC 3728 3729 // enable will enable SSP during init 3730 void gap_ssp_set_enable(int enable){ 3731 hci_stack->ssp_enable = enable; 3732 } 3733 3734 static int hci_local_ssp_activated(void){ 3735 return gap_ssp_supported() && hci_stack->ssp_enable; 3736 } 3737 3738 // if set, BTstack will respond to io capability request using authentication requirement 3739 void gap_ssp_set_io_capability(int io_capability){ 3740 hci_stack->ssp_io_capability = io_capability; 3741 } 3742 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3743 hci_stack->ssp_authentication_requirement = authentication_requirement; 3744 } 3745 3746 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3747 void gap_ssp_set_auto_accept(int auto_accept){ 3748 hci_stack->ssp_auto_accept = auto_accept; 3749 } 3750 #endif 3751 3752 // va_list part of hci_send_cmd 3753 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3754 if (!hci_can_send_command_packet_now()){ 3755 log_error("hci_send_cmd called but cannot send packet now"); 3756 return 0; 3757 } 3758 3759 // for HCI INITIALIZATION 3760 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3761 hci_stack->last_cmd_opcode = cmd->opcode; 3762 3763 hci_reserve_packet_buffer(); 3764 uint8_t * packet = hci_stack->hci_packet_buffer; 3765 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3766 int err = hci_send_cmd_packet(packet, size); 3767 3768 // release packet buffer for synchronous transport implementations 3769 if (hci_transport_synchronous()){ 3770 hci_release_packet_buffer(); 3771 hci_emit_transport_packet_sent(); 3772 } 3773 3774 return err; 3775 } 3776 3777 /** 3778 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3779 */ 3780 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3781 va_list argptr; 3782 va_start(argptr, cmd); 3783 int res = hci_send_cmd_va_arg(cmd, argptr); 3784 va_end(argptr); 3785 return res; 3786 } 3787 3788 // Create various non-HCI events. 3789 // TODO: generalize, use table similar to hci_create_command 3790 3791 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3792 // dump packet 3793 if (dump) { 3794 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3795 } 3796 3797 // dispatch to all event handlers 3798 btstack_linked_list_iterator_t it; 3799 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3800 while (btstack_linked_list_iterator_has_next(&it)){ 3801 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3802 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3803 } 3804 } 3805 3806 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3807 if (!hci_stack->acl_packet_handler) return; 3808 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3809 } 3810 3811 #ifdef ENABLE_CLASSIC 3812 static void hci_notify_if_sco_can_send_now(void){ 3813 // notify SCO sender if waiting 3814 if (!hci_stack->sco_waiting_for_can_send_now) return; 3815 if (hci_can_send_sco_packet_now()){ 3816 hci_stack->sco_waiting_for_can_send_now = 0; 3817 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3818 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3819 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3820 } 3821 } 3822 3823 // parsing end emitting has been merged to reduce code size 3824 static void gap_inquiry_explode(uint8_t * packet){ 3825 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 3826 3827 uint8_t * eir_data; 3828 ad_context_t context; 3829 const uint8_t * name; 3830 uint8_t name_len; 3831 3832 int event_type = hci_event_packet_get_type(packet); 3833 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3834 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 3835 3836 // event[1] is set at the end 3837 int i; 3838 for (i=0; i<num_responses;i++){ 3839 memset(event, 0, sizeof(event)); 3840 event[0] = GAP_EVENT_INQUIRY_RESULT; 3841 uint8_t event_size = 18; // if name is not set by EIR 3842 3843 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 3844 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 3845 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 3846 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 3847 3848 switch (event_type){ 3849 case HCI_EVENT_INQUIRY_RESULT: 3850 // 14,15,16,17 = 0, size 18 3851 break; 3852 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3853 event[14] = 1; 3854 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3855 // 16,17 = 0, size 18 3856 break; 3857 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3858 event[14] = 1; 3859 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3860 // for EIR packets, there is only one reponse in it 3861 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 3862 name = NULL; 3863 // EIR data is 240 bytes in EIR event 3864 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 3865 uint8_t data_type = ad_iterator_get_data_type(&context); 3866 uint8_t data_size = ad_iterator_get_data_len(&context); 3867 const uint8_t * data = ad_iterator_get_data(&context); 3868 // Prefer Complete Local Name over Shortend Local Name 3869 switch (data_type){ 3870 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 3871 if (name) continue; 3872 /* explicit fall-through */ 3873 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 3874 name = data; 3875 name_len = data_size; 3876 break; 3877 default: 3878 break; 3879 } 3880 } 3881 if (name){ 3882 event[16] = 1; 3883 // truncate name if needed 3884 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 3885 event[17] = len; 3886 memcpy(&event[18], name, len); 3887 event_size += len; 3888 } 3889 break; 3890 } 3891 event[1] = event_size - 2; 3892 hci_emit_event(event, event_size, 1); 3893 } 3894 } 3895 #endif 3896 3897 void hci_emit_state(void){ 3898 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3899 uint8_t event[3]; 3900 event[0] = BTSTACK_EVENT_STATE; 3901 event[1] = sizeof(event) - 2; 3902 event[2] = hci_stack->state; 3903 hci_emit_event(event, sizeof(event), 1); 3904 } 3905 3906 #ifdef ENABLE_CLASSIC 3907 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3908 uint8_t event[13]; 3909 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3910 event[1] = sizeof(event) - 2; 3911 event[2] = status; 3912 little_endian_store_16(event, 3, con_handle); 3913 reverse_bd_addr(address, &event[5]); 3914 event[11] = 1; // ACL connection 3915 event[12] = 0; // encryption disabled 3916 hci_emit_event(event, sizeof(event), 1); 3917 } 3918 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3919 if (disable_l2cap_timeouts) return; 3920 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3921 uint8_t event[4]; 3922 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3923 event[1] = sizeof(event) - 2; 3924 little_endian_store_16(event, 2, conn->con_handle); 3925 hci_emit_event(event, sizeof(event), 1); 3926 } 3927 #endif 3928 3929 #ifdef ENABLE_BLE 3930 #ifdef ENABLE_LE_CENTRAL 3931 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3932 uint8_t event[21]; 3933 event[0] = HCI_EVENT_LE_META; 3934 event[1] = sizeof(event) - 2; 3935 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3936 event[3] = status; 3937 little_endian_store_16(event, 4, con_handle); 3938 event[6] = 0; // TODO: role 3939 event[7] = address_type; 3940 reverse_bd_addr(address, &event[8]); 3941 little_endian_store_16(event, 14, 0); // interval 3942 little_endian_store_16(event, 16, 0); // latency 3943 little_endian_store_16(event, 18, 0); // supervision timeout 3944 event[20] = 0; // master clock accuracy 3945 hci_emit_event(event, sizeof(event), 1); 3946 } 3947 #endif 3948 #endif 3949 3950 static void hci_emit_transport_packet_sent(void){ 3951 // notify upper stack that it might be possible to send again 3952 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 3953 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 3954 } 3955 3956 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3957 uint8_t event[6]; 3958 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3959 event[1] = sizeof(event) - 2; 3960 event[2] = 0; // status = OK 3961 little_endian_store_16(event, 3, con_handle); 3962 event[5] = reason; 3963 hci_emit_event(event, sizeof(event), 1); 3964 } 3965 3966 static void hci_emit_nr_connections_changed(void){ 3967 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3968 uint8_t event[3]; 3969 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3970 event[1] = sizeof(event) - 2; 3971 event[2] = nr_hci_connections(); 3972 hci_emit_event(event, sizeof(event), 1); 3973 } 3974 3975 static void hci_emit_hci_open_failed(void){ 3976 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3977 uint8_t event[2]; 3978 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3979 event[1] = sizeof(event) - 2; 3980 hci_emit_event(event, sizeof(event), 1); 3981 } 3982 3983 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3984 log_info("hci_emit_dedicated_bonding_result %u ", status); 3985 uint8_t event[9]; 3986 int pos = 0; 3987 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3988 event[pos++] = sizeof(event) - 2; 3989 event[pos++] = status; 3990 reverse_bd_addr(address, &event[pos]); 3991 hci_emit_event(event, sizeof(event), 1); 3992 } 3993 3994 3995 #ifdef ENABLE_CLASSIC 3996 3997 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3998 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3999 uint8_t event[5]; 4000 int pos = 0; 4001 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4002 event[pos++] = sizeof(event) - 2; 4003 little_endian_store_16(event, 2, con_handle); 4004 pos += 2; 4005 event[pos++] = level; 4006 hci_emit_event(event, sizeof(event), 1); 4007 } 4008 4009 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4010 if (!connection) return LEVEL_0; 4011 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4012 return gap_security_level_for_link_key_type(connection->link_key_type); 4013 } 4014 4015 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4016 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4017 uint8_t event[3]; 4018 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4019 event[1] = sizeof(event) - 2; 4020 event[2] = enabled; 4021 hci_emit_event(event, sizeof(event), 1); 4022 } 4023 4024 #ifdef ENABLE_CLASSIC 4025 // query if remote side supports eSCO 4026 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4027 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4028 if (!connection) return 0; 4029 return connection->remote_supported_feature_eSCO; 4030 } 4031 4032 // query if remote side supports SSP 4033 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4034 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4035 if (!connection) return 0; 4036 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4037 } 4038 4039 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4040 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4041 } 4042 #endif 4043 4044 // GAP API 4045 /** 4046 * @bbrief enable/disable bonding. default is enabled 4047 * @praram enabled 4048 */ 4049 void gap_set_bondable_mode(int enable){ 4050 hci_stack->bondable = enable ? 1 : 0; 4051 } 4052 /** 4053 * @brief Get bondable mode. 4054 * @return 1 if bondable 4055 */ 4056 int gap_get_bondable_mode(void){ 4057 return hci_stack->bondable; 4058 } 4059 4060 /** 4061 * @brief map link keys to security levels 4062 */ 4063 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4064 switch (link_key_type){ 4065 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4066 return LEVEL_4; 4067 case COMBINATION_KEY: 4068 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4069 return LEVEL_3; 4070 default: 4071 return LEVEL_2; 4072 } 4073 } 4074 4075 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4076 log_info("gap_mitm_protection_required_for_security_level %u", level); 4077 return level > LEVEL_2; 4078 } 4079 4080 /** 4081 * @brief get current security level 4082 */ 4083 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4084 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4085 if (!connection) return LEVEL_0; 4086 return gap_security_level_for_connection(connection); 4087 } 4088 4089 /** 4090 * @brief request connection to device to 4091 * @result GAP_AUTHENTICATION_RESULT 4092 */ 4093 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4094 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4095 if (!connection){ 4096 hci_emit_security_level(con_handle, LEVEL_0); 4097 return; 4098 } 4099 gap_security_level_t current_level = gap_security_level(con_handle); 4100 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4101 requested_level, connection->requested_security_level, current_level); 4102 4103 // assumption: earlier requested security higher than current level => security request is active 4104 if (current_level < connection->requested_security_level){ 4105 if (connection->requested_security_level < requested_level){ 4106 // increase requested level as new level is higher 4107 4108 // TODO: handle re-authentication when done 4109 4110 connection->requested_security_level = requested_level; 4111 } 4112 return; 4113 } 4114 4115 // no request active, notify if security sufficient 4116 if (requested_level <= current_level){ 4117 hci_emit_security_level(con_handle, current_level); 4118 return; 4119 } 4120 4121 // start pairing to increase security level 4122 connection->requested_security_level = requested_level; 4123 4124 #if 0 4125 // sending encryption request without a link key results in an error. 4126 // TODO: figure out how to use it properly 4127 4128 // would enabling ecnryption suffice (>= LEVEL_2)? 4129 if (hci_stack->link_key_db){ 4130 link_key_type_t link_key_type; 4131 link_key_t link_key; 4132 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4133 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4134 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4135 return; 4136 } 4137 } 4138 } 4139 #endif 4140 4141 // start to authenticate connection 4142 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4143 hci_run(); 4144 } 4145 4146 /** 4147 * @brief start dedicated bonding with device. disconnect after bonding 4148 * @param device 4149 * @param request MITM protection 4150 * @result GAP_DEDICATED_BONDING_COMPLETE 4151 */ 4152 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4153 4154 // create connection state machine 4155 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 4156 4157 if (!connection){ 4158 return BTSTACK_MEMORY_ALLOC_FAILED; 4159 } 4160 4161 // delete linkn key 4162 gap_drop_link_key_for_bd_addr(device); 4163 4164 // configure LEVEL_2/3, dedicated bonding 4165 connection->state = SEND_CREATE_CONNECTION; 4166 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4167 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4168 connection->bonding_flags = BONDING_DEDICATED; 4169 4170 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4171 4172 // handle: connnection failure (connection complete != ok) 4173 // handle: authentication failure 4174 // handle: disconnect on done 4175 4176 hci_run(); 4177 4178 return 0; 4179 } 4180 #endif 4181 4182 void gap_set_local_name(const char * local_name){ 4183 hci_stack->local_name = local_name; 4184 } 4185 4186 4187 #ifdef ENABLE_BLE 4188 4189 #ifdef ENABLE_LE_CENTRAL 4190 void gap_start_scan(void){ 4191 hci_stack->le_scanning_enabled = 1; 4192 hci_run(); 4193 } 4194 4195 void gap_stop_scan(void){ 4196 hci_stack->le_scanning_enabled = 0; 4197 hci_run(); 4198 } 4199 4200 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4201 hci_stack->le_scan_type = scan_type; 4202 hci_stack->le_scan_interval = scan_interval; 4203 hci_stack->le_scan_window = scan_window; 4204 hci_run(); 4205 } 4206 4207 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4208 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4209 if (!conn){ 4210 log_info("gap_connect: no connection exists yet, creating context"); 4211 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4212 if (!conn){ 4213 // notify client that alloc failed 4214 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4215 log_info("gap_connect: failed to alloc hci_connection_t"); 4216 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4217 } 4218 conn->state = SEND_CREATE_CONNECTION; 4219 log_info("gap_connect: send create connection next"); 4220 hci_run(); 4221 return 0; 4222 } 4223 4224 if (!hci_is_le_connection(conn) || 4225 conn->state == SEND_CREATE_CONNECTION || 4226 conn->state == SENT_CREATE_CONNECTION) { 4227 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4228 log_error("gap_connect: classic connection or connect is already being created"); 4229 return GATT_CLIENT_IN_WRONG_STATE; 4230 } 4231 4232 log_info("gap_connect: context exists with state %u", conn->state); 4233 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4234 hci_run(); 4235 return 0; 4236 } 4237 4238 // @assumption: only a single outgoing LE Connection exists 4239 static hci_connection_t * gap_get_outgoing_connection(void){ 4240 btstack_linked_item_t *it; 4241 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4242 hci_connection_t * conn = (hci_connection_t *) it; 4243 if (!hci_is_le_connection(conn)) continue; 4244 switch (conn->state){ 4245 case SEND_CREATE_CONNECTION: 4246 case SENT_CREATE_CONNECTION: 4247 case SENT_CANCEL_CONNECTION: 4248 return conn; 4249 default: 4250 break; 4251 }; 4252 } 4253 return NULL; 4254 } 4255 4256 uint8_t gap_connect_cancel(void){ 4257 hci_connection_t * conn = gap_get_outgoing_connection(); 4258 if (!conn) return 0; 4259 switch (conn->state){ 4260 case SEND_CREATE_CONNECTION: 4261 // skip sending create connection and emit event instead 4262 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4263 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4264 btstack_memory_hci_connection_free( conn ); 4265 break; 4266 case SENT_CREATE_CONNECTION: 4267 // request to send cancel connection 4268 conn->state = SEND_CANCEL_CONNECTION; 4269 hci_run(); 4270 break; 4271 default: 4272 break; 4273 } 4274 return 0; 4275 } 4276 #endif 4277 4278 #ifdef ENABLE_LE_CENTRAL 4279 /** 4280 * @brief Set connection parameters for outgoing connections 4281 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4282 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4283 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4284 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4285 * @param conn_latency, default: 4 4286 * @param supervision_timeout (unit: 10ms), default: 720 ms 4287 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4288 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4289 */ 4290 4291 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4292 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4293 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4294 hci_stack->le_connection_scan_interval = conn_scan_interval; 4295 hci_stack->le_connection_scan_window = conn_scan_window; 4296 hci_stack->le_connection_interval_min = conn_interval_min; 4297 hci_stack->le_connection_interval_max = conn_interval_max; 4298 hci_stack->le_connection_latency = conn_latency; 4299 hci_stack->le_supervision_timeout = supervision_timeout; 4300 hci_stack->le_minimum_ce_length = min_ce_length; 4301 hci_stack->le_maximum_ce_length = max_ce_length; 4302 } 4303 #endif 4304 4305 /** 4306 * @brief Updates the connection parameters for a given LE connection 4307 * @param handle 4308 * @param conn_interval_min (unit: 1.25ms) 4309 * @param conn_interval_max (unit: 1.25ms) 4310 * @param conn_latency 4311 * @param supervision_timeout (unit: 10ms) 4312 * @returns 0 if ok 4313 */ 4314 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4315 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4316 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4317 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4318 connection->le_conn_interval_min = conn_interval_min; 4319 connection->le_conn_interval_max = conn_interval_max; 4320 connection->le_conn_latency = conn_latency; 4321 connection->le_supervision_timeout = supervision_timeout; 4322 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4323 hci_run(); 4324 return 0; 4325 } 4326 4327 /** 4328 * @brief Request an update of the connection parameter for a given LE connection 4329 * @param handle 4330 * @param conn_interval_min (unit: 1.25ms) 4331 * @param conn_interval_max (unit: 1.25ms) 4332 * @param conn_latency 4333 * @param supervision_timeout (unit: 10ms) 4334 * @returns 0 if ok 4335 */ 4336 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4337 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4338 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4339 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4340 connection->le_conn_interval_min = conn_interval_min; 4341 connection->le_conn_interval_max = conn_interval_max; 4342 connection->le_conn_latency = conn_latency; 4343 connection->le_supervision_timeout = supervision_timeout; 4344 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4345 hci_run(); 4346 return 0; 4347 } 4348 4349 #ifdef ENABLE_LE_PERIPHERAL 4350 4351 static void gap_advertisments_changed(void){ 4352 // disable advertisements before updating adv, scan data, or adv params 4353 if (hci_stack->le_advertisements_active){ 4354 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4355 } 4356 hci_run(); 4357 } 4358 4359 /** 4360 * @brief Set Advertisement Data 4361 * @param advertising_data_length 4362 * @param advertising_data (max 31 octets) 4363 * @note data is not copied, pointer has to stay valid 4364 */ 4365 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4366 hci_stack->le_advertisements_data_len = advertising_data_length; 4367 hci_stack->le_advertisements_data = advertising_data; 4368 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4369 gap_advertisments_changed(); 4370 } 4371 4372 /** 4373 * @brief Set Scan Response Data 4374 * @param advertising_data_length 4375 * @param advertising_data (max 31 octets) 4376 * @note data is not copied, pointer has to stay valid 4377 */ 4378 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4379 hci_stack->le_scan_response_data_len = scan_response_data_length; 4380 hci_stack->le_scan_response_data = scan_response_data; 4381 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4382 gap_advertisments_changed(); 4383 } 4384 4385 /** 4386 * @brief Set Advertisement Parameters 4387 * @param adv_int_min 4388 * @param adv_int_max 4389 * @param adv_type 4390 * @param direct_address_type 4391 * @param direct_address 4392 * @param channel_map 4393 * @param filter_policy 4394 * 4395 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4396 */ 4397 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4398 uint8_t direct_address_typ, bd_addr_t direct_address, 4399 uint8_t channel_map, uint8_t filter_policy) { 4400 4401 hci_stack->le_advertisements_interval_min = adv_int_min; 4402 hci_stack->le_advertisements_interval_max = adv_int_max; 4403 hci_stack->le_advertisements_type = adv_type; 4404 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4405 hci_stack->le_advertisements_channel_map = channel_map; 4406 hci_stack->le_advertisements_filter_policy = filter_policy; 4407 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4408 4409 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4410 gap_advertisments_changed(); 4411 } 4412 4413 /** 4414 * @brief Enable/Disable Advertisements 4415 * @param enabled 4416 */ 4417 void gap_advertisements_enable(int enabled){ 4418 hci_stack->le_advertisements_enabled = enabled; 4419 if (enabled && !hci_stack->le_advertisements_active){ 4420 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4421 } 4422 if (!enabled && hci_stack->le_advertisements_active){ 4423 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4424 } 4425 hci_run(); 4426 } 4427 4428 #endif 4429 4430 void hci_le_set_own_address_type(uint8_t own_address_type){ 4431 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4432 if (own_address_type == hci_stack->le_own_addr_type) return; 4433 hci_stack->le_own_addr_type = own_address_type; 4434 4435 #ifdef ENABLE_LE_PERIPHERAL 4436 // update advertisement parameters, too 4437 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4438 gap_advertisments_changed(); 4439 #endif 4440 #ifdef ENABLE_LE_CENTRAL 4441 // note: we don't update scan parameters or modify ongoing connection attempts 4442 #endif 4443 } 4444 4445 #endif 4446 4447 uint8_t gap_disconnect(hci_con_handle_t handle){ 4448 hci_connection_t * conn = hci_connection_for_handle(handle); 4449 if (!conn){ 4450 hci_emit_disconnection_complete(handle, 0); 4451 return 0; 4452 } 4453 // ignore if already disconnected 4454 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4455 return 0; 4456 } 4457 conn->state = SEND_DISCONNECT; 4458 hci_run(); 4459 return 0; 4460 } 4461 4462 /** 4463 * @brief Get connection type 4464 * @param con_handle 4465 * @result connection_type 4466 */ 4467 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4468 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4469 if (!conn) return GAP_CONNECTION_INVALID; 4470 switch (conn->address_type){ 4471 case BD_ADDR_TYPE_LE_PUBLIC: 4472 case BD_ADDR_TYPE_LE_RANDOM: 4473 return GAP_CONNECTION_LE; 4474 case BD_ADDR_TYPE_SCO: 4475 return GAP_CONNECTION_SCO; 4476 case BD_ADDR_TYPE_CLASSIC: 4477 return GAP_CONNECTION_ACL; 4478 default: 4479 return GAP_CONNECTION_INVALID; 4480 } 4481 } 4482 4483 #ifdef ENABLE_BLE 4484 4485 #ifdef ENABLE_LE_CENTRAL 4486 /** 4487 * @brief Auto Connection Establishment - Start Connecting to device 4488 * @param address_typ 4489 * @param address 4490 * @returns 0 if ok 4491 */ 4492 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4493 // check capacity 4494 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4495 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4496 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4497 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4498 entry->address_type = address_type; 4499 memcpy(entry->address, address, 6); 4500 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4501 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4502 hci_run(); 4503 return 0; 4504 } 4505 4506 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4507 btstack_linked_list_iterator_t it; 4508 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4509 while (btstack_linked_list_iterator_has_next(&it)){ 4510 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4511 if (entry->address_type != address_type) continue; 4512 if (memcmp(entry->address, address, 6) != 0) continue; 4513 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4514 // remove from controller if already present 4515 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4516 continue; 4517 } 4518 // direclty remove entry from whitelist 4519 btstack_linked_list_iterator_remove(&it); 4520 btstack_memory_whitelist_entry_free(entry); 4521 } 4522 } 4523 4524 /** 4525 * @brief Auto Connection Establishment - Stop Connecting to device 4526 * @param address_typ 4527 * @param address 4528 * @returns 0 if ok 4529 */ 4530 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4531 hci_remove_from_whitelist(address_type, address); 4532 hci_run(); 4533 return 0; 4534 } 4535 4536 /** 4537 * @brief Auto Connection Establishment - Stop everything 4538 * @note Convenience function to stop all active auto connection attempts 4539 */ 4540 void gap_auto_connection_stop_all(void){ 4541 btstack_linked_list_iterator_t it; 4542 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4543 while (btstack_linked_list_iterator_has_next(&it)){ 4544 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4545 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4546 // remove from controller if already present 4547 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4548 continue; 4549 } 4550 // directly remove entry from whitelist 4551 btstack_linked_list_iterator_remove(&it); 4552 btstack_memory_whitelist_entry_free(entry); 4553 } 4554 hci_run(); 4555 } 4556 #endif 4557 #endif 4558 4559 #ifdef ENABLE_CLASSIC 4560 /** 4561 * @brief Set Extended Inquiry Response data 4562 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4563 * @note has to be done before stack starts up 4564 */ 4565 void gap_set_extended_inquiry_response(const uint8_t * data){ 4566 hci_stack->eir_data = data; 4567 } 4568 4569 /** 4570 * @brief Start GAP Classic Inquiry 4571 * @param duration in 1.28s units 4572 * @return 0 if ok 4573 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4574 */ 4575 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4576 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4577 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4578 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4579 } 4580 hci_stack->inquiry_state = duration_in_1280ms_units; 4581 hci_run(); 4582 return 0; 4583 } 4584 4585 /** 4586 * @brief Stop GAP Classic Inquiry 4587 * @returns 0 if ok 4588 */ 4589 int gap_inquiry_stop(void){ 4590 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN || hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4591 // emit inquiry complete event, before it even started 4592 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4593 hci_emit_event(event, sizeof(event), 1); 4594 return 0; 4595 } 4596 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4597 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4598 hci_run(); 4599 return 0; 4600 } 4601 4602 4603 /** 4604 * @brief Remote Name Request 4605 * @param addr 4606 * @param page_scan_repetition_mode 4607 * @param clock_offset only used when bit 15 is set 4608 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4609 */ 4610 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4611 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4612 memcpy(hci_stack->remote_name_addr, addr, 6); 4613 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4614 hci_stack->remote_name_clock_offset = clock_offset; 4615 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4616 hci_run(); 4617 return 0; 4618 } 4619 4620 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4621 hci_stack->gap_pairing_state = state; 4622 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4623 hci_run(); 4624 return 0; 4625 } 4626 4627 /** 4628 * @brief Legacy Pairing Pin Code Response 4629 * @param addr 4630 * @param pin 4631 * @return 0 if ok 4632 */ 4633 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4634 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4635 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 4636 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4637 } 4638 4639 /** 4640 * @brief Abort Legacy Pairing 4641 * @param addr 4642 * @param pin 4643 * @return 0 if ok 4644 */ 4645 int gap_pin_code_negative(bd_addr_t addr){ 4646 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4647 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4648 } 4649 4650 /** 4651 * @brief SSP Passkey Response 4652 * @param addr 4653 * @param passkey 4654 * @return 0 if ok 4655 */ 4656 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4657 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4658 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 4659 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4660 } 4661 4662 /** 4663 * @brief Abort SSP Passkey Entry/Pairing 4664 * @param addr 4665 * @param pin 4666 * @return 0 if ok 4667 */ 4668 int gap_ssp_passkey_negative(bd_addr_t addr){ 4669 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4670 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4671 } 4672 4673 /** 4674 * @brief Accept SSP Numeric Comparison 4675 * @param addr 4676 * @param passkey 4677 * @return 0 if ok 4678 */ 4679 int gap_ssp_confirmation_response(bd_addr_t addr){ 4680 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4681 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4682 } 4683 4684 /** 4685 * @brief Abort SSP Numeric Comparison/Pairing 4686 * @param addr 4687 * @param pin 4688 * @return 0 if ok 4689 */ 4690 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4691 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4692 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4693 } 4694 4695 /** 4696 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4697 * @param inquiry_mode see bluetooth_defines.h 4698 */ 4699 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4700 hci_stack->inquiry_mode = mode; 4701 } 4702 4703 /** 4704 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4705 */ 4706 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4707 hci_stack->sco_voice_setting = voice_setting; 4708 } 4709 4710 /** 4711 * @brief Get SCO Voice Setting 4712 * @return current voice setting 4713 */ 4714 uint16_t hci_get_sco_voice_setting(void){ 4715 return hci_stack->sco_voice_setting; 4716 } 4717 4718 /** @brief Get SCO packet length for current SCO Voice setting 4719 * @note Using SCO packets of the exact length is required for USB transfer 4720 * @return Length of SCO packets in bytes (not audio frames) 4721 */ 4722 int hci_get_sco_packet_length(void){ 4723 int sco_packet_length = 0; 4724 4725 #ifdef ENABLE_CLASSIC 4726 #ifdef ENABLE_SCO_OVER_HCI 4727 // see Core Spec for H2 USB Transfer. 4728 4729 // CVSD requires twice as much bytes 4730 int multiplier = hci_stack->sco_voice_setting & 0x0020 ? 2 : 1; 4731 4732 // 3 byte SCO header + 24 bytes per connection 4733 sco_packet_length = 3 + 24 * hci_number_sco_connections() * multiplier; 4734 #endif 4735 #endif 4736 return sco_packet_length; 4737 } 4738 4739 /** 4740 * @brief Sets the master/slave policy 4741 * @param policy (0: attempt to become master, 1: let connecting device decide) 4742 */ 4743 void hci_set_master_slave_policy(uint8_t policy){ 4744 hci_stack->master_slave_policy = policy; 4745 } 4746 4747 #endif 4748 4749 HCI_STATE hci_get_state(void){ 4750 return hci_stack->state; 4751 } 4752 4753 4754 /** 4755 * @brief Set callback for Bluetooth Hardware Error 4756 */ 4757 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4758 hci_stack->hardware_error_callback = fn; 4759 } 4760 4761 void hci_disconnect_all(void){ 4762 btstack_linked_list_iterator_t it; 4763 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4764 while (btstack_linked_list_iterator_has_next(&it)){ 4765 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4766 if (con->state == SENT_DISCONNECT) continue; 4767 con->state = SEND_DISCONNECT; 4768 } 4769 hci_run(); 4770 } 4771 4772 uint16_t hci_get_manufacturer(void){ 4773 return hci_stack->manufacturer; 4774 } 4775 4776 #ifdef ENABLE_BLE 4777 4778 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 4779 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 4780 if (!hci_con) return NULL; 4781 return &hci_con->sm_connection; 4782 } 4783 4784 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 4785 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 4786 4787 int gap_encryption_key_size(hci_con_handle_t con_handle){ 4788 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4789 if (!sm_conn) return 0; // wrong connection 4790 if (!sm_conn->sm_connection_encrypted) return 0; 4791 return sm_conn->sm_actual_encryption_key_size; 4792 } 4793 4794 int gap_authenticated(hci_con_handle_t con_handle){ 4795 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4796 if (!sm_conn) return 0; // wrong connection 4797 if (!sm_conn->sm_connection_encrypted) return 0; // unencrypted connection cannot be authenticated 4798 return sm_conn->sm_connection_authenticated; 4799 } 4800 4801 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 4802 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4803 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 4804 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 4805 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 4806 return sm_conn->sm_connection_authorization_state; 4807 } 4808 #endif 4809