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_DEFAULT_LINK_POLICY_SETTING: 1354 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1355 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1356 break; 1357 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1358 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1359 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1360 break; 1361 case HCI_INIT_WRITE_LOCAL_NAME: { 1362 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1363 hci_reserve_packet_buffer(); 1364 uint8_t * packet = hci_stack->hci_packet_buffer; 1365 // construct HCI Command and send 1366 uint16_t opcode = hci_write_local_name.opcode; 1367 hci_stack->last_cmd_opcode = opcode; 1368 packet[0] = opcode & 0xff; 1369 packet[1] = opcode >> 8; 1370 packet[2] = DEVICE_NAME_LEN; 1371 memset(&packet[3], 0, DEVICE_NAME_LEN); 1372 memcpy(&packet[3], hci_stack->local_name, strlen(hci_stack->local_name)); 1373 // expand '00:00:00:00:00:00' in name with bd_addr 1374 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1375 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1376 break; 1377 } 1378 case HCI_INIT_WRITE_EIR_DATA: { 1379 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1380 hci_reserve_packet_buffer(); 1381 uint8_t * packet = hci_stack->hci_packet_buffer; 1382 // construct HCI Command and send 1383 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1384 hci_stack->last_cmd_opcode = opcode; 1385 packet[0] = opcode & 0xff; 1386 packet[1] = opcode >> 8; 1387 packet[2] = 1 + 240; 1388 packet[3] = 0; // FEC not required 1389 if (hci_stack->eir_data){ 1390 memcpy(&packet[4], hci_stack->eir_data, 240); 1391 } else { 1392 memset(&packet[4], 0, 240); 1393 int name_len = strlen(hci_stack->local_name); 1394 packet[4] = name_len + 1; 1395 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1396 memcpy(&packet[6], hci_stack->local_name, name_len); 1397 } 1398 // expand '00:00:00:00:00:00' in name with bd_addr 1399 hci_replace_bd_addr_placeholder(&packet[4], 240); 1400 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1401 break; 1402 } 1403 case HCI_INIT_WRITE_INQUIRY_MODE: 1404 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1405 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1406 break; 1407 case HCI_INIT_WRITE_SCAN_ENABLE: 1408 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1409 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1410 break; 1411 // only sent if ENABLE_SCO_OVER_HCI is defined 1412 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1413 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1414 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1415 break; 1416 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1417 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1418 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1419 break; 1420 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1421 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1422 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1423 log_info("BCM: Route SCO data via HCI transport"); 1424 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1425 break; 1426 1427 #endif 1428 #ifdef ENABLE_BLE 1429 // LE INIT 1430 case HCI_INIT_LE_READ_BUFFER_SIZE: 1431 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1432 hci_send_cmd(&hci_le_read_buffer_size); 1433 break; 1434 case HCI_INIT_LE_SET_EVENT_MASK: 1435 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1436 hci_send_cmd(&hci_le_set_event_mask, 0x1FF, 0x0); 1437 break; 1438 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1439 // LE Supported Host = 1, Simultaneous Host = 0 1440 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1441 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1442 break; 1443 #endif 1444 1445 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1446 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1447 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1448 hci_send_cmd(&hci_le_read_maximum_data_length); 1449 break; 1450 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1451 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1452 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1453 break; 1454 #endif 1455 1456 #ifdef ENABLE_LE_CENTRAL 1457 case HCI_INIT_READ_WHITE_LIST_SIZE: 1458 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1459 hci_send_cmd(&hci_le_read_white_list_size); 1460 break; 1461 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1462 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1463 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1464 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1465 break; 1466 #endif 1467 default: 1468 return; 1469 } 1470 } 1471 1472 static void hci_init_done(void){ 1473 // done. tell the app 1474 log_info("hci_init_done -> HCI_STATE_WORKING"); 1475 hci_stack->state = HCI_STATE_WORKING; 1476 hci_emit_state(); 1477 hci_run(); 1478 } 1479 1480 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1481 1482 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1483 1484 uint8_t command_completed = 0; 1485 1486 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1487 uint16_t opcode = little_endian_read_16(packet,3); 1488 if (opcode == hci_stack->last_cmd_opcode){ 1489 command_completed = 1; 1490 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1491 } else { 1492 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1493 } 1494 } 1495 1496 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1497 uint8_t status = packet[2]; 1498 uint16_t opcode = little_endian_read_16(packet,4); 1499 if (opcode == hci_stack->last_cmd_opcode){ 1500 if (status){ 1501 command_completed = 1; 1502 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1503 } else { 1504 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1505 } 1506 } else { 1507 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1508 } 1509 } 1510 1511 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1512 1513 // Vendor == CSR 1514 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1515 // TODO: track actual command 1516 command_completed = 1; 1517 } 1518 1519 // Vendor == Toshiba 1520 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1521 // TODO: track actual command 1522 command_completed = 1; 1523 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1524 hci_stack->num_cmd_packets = 1; 1525 } 1526 1527 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1528 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1529 // 1530 // HCI Reset 1531 // Timeout 100 ms 1532 // HCI Reset 1533 // Command Complete Reset 1534 // HCI Read Local Version Information 1535 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1536 // hang... 1537 // 1538 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1539 if (!command_completed 1540 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1541 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1542 1543 uint16_t opcode = little_endian_read_16(packet,3); 1544 if (opcode == hci_reset.opcode){ 1545 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1546 return; 1547 } 1548 } 1549 1550 // CSR & H5 1551 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1552 if (!command_completed 1553 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1554 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1555 1556 uint16_t opcode = little_endian_read_16(packet,3); 1557 if (opcode == hci_reset.opcode){ 1558 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1559 return; 1560 } 1561 } 1562 1563 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1564 // fix: Correct substate and behave as command below 1565 if (command_completed){ 1566 switch (hci_stack->substate){ 1567 case HCI_INIT_SEND_RESET: 1568 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1569 break; 1570 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1571 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1572 break; 1573 default: 1574 break; 1575 } 1576 } 1577 1578 #endif 1579 1580 if (!command_completed) return; 1581 1582 int need_baud_change = 0; 1583 int need_addr_change = 0; 1584 1585 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1586 need_baud_change = hci_stack->config 1587 && hci_stack->chipset 1588 && hci_stack->chipset->set_baudrate_command 1589 && hci_stack->hci_transport->set_baudrate 1590 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1591 1592 need_addr_change = hci_stack->custom_bd_addr_set 1593 && hci_stack->chipset 1594 && hci_stack->chipset->set_bd_addr_command; 1595 #endif 1596 1597 switch(hci_stack->substate){ 1598 1599 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1600 case HCI_INIT_SEND_RESET: 1601 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1602 // fix: just correct substate and behave as command below 1603 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1604 btstack_run_loop_remove_timer(&hci_stack->timeout); 1605 break; 1606 case HCI_INIT_W4_SEND_RESET: 1607 btstack_run_loop_remove_timer(&hci_stack->timeout); 1608 break; 1609 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1610 log_info("Received local name, need baud change %d", need_baud_change); 1611 if (need_baud_change){ 1612 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1613 return; 1614 } 1615 // skip baud change 1616 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1617 return; 1618 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1619 // for STLC2500D, baud rate change already happened. 1620 // for others, baud rate gets changed now 1621 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1622 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1623 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1624 hci_stack->hci_transport->set_baudrate(baud_rate); 1625 } 1626 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1627 return; 1628 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1629 btstack_run_loop_remove_timer(&hci_stack->timeout); 1630 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1631 return; 1632 case HCI_INIT_W4_CUSTOM_INIT: 1633 // repeat custom init 1634 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1635 return; 1636 #else 1637 case HCI_INIT_W4_SEND_RESET: 1638 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1639 return ; 1640 #endif 1641 1642 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1643 if (need_baud_change && 1644 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1645 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1646 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1647 return; 1648 } 1649 if (need_addr_change){ 1650 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1651 return; 1652 } 1653 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1654 return; 1655 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1656 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1657 if (need_baud_change){ 1658 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1659 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1660 hci_stack->hci_transport->set_baudrate(baud_rate); 1661 } 1662 if (need_addr_change){ 1663 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1664 return; 1665 } 1666 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1667 return; 1668 case HCI_INIT_W4_SET_BD_ADDR: 1669 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1670 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1671 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1672 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1673 return; 1674 } 1675 // skipping st warm boot 1676 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1677 return; 1678 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1679 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1680 return; 1681 #endif 1682 case HCI_INIT_W4_READ_BD_ADDR: 1683 // only read buffer size if supported 1684 if (hci_stack->local_supported_commands[0] & 0x01) { 1685 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1686 return; 1687 } 1688 // skipping read buffer size 1689 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1690 return; 1691 case HCI_INIT_W4_SET_EVENT_MASK: 1692 // skip Classic init commands for LE only chipsets 1693 if (!hci_classic_supported()){ 1694 #ifdef ENABLE_BLE 1695 if (hci_le_supported()){ 1696 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1697 return; 1698 } 1699 #endif 1700 log_error("Neither BR/EDR nor LE supported"); 1701 hci_init_done(); 1702 return; 1703 } 1704 if (!gap_ssp_supported()){ 1705 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1706 return; 1707 } 1708 break; 1709 #ifdef ENABLE_BLE 1710 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1711 // skip write le host if not supported (e.g. on LE only EM9301) 1712 if (hci_stack->local_supported_commands[0] & 0x02) break; 1713 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1714 return; 1715 1716 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1717 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1718 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1719 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1720 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1721 return; 1722 } 1723 // explicit fall through to reduce repetitions 1724 1725 #ifdef ENABLE_LE_CENTRAL 1726 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1727 #else 1728 hci_init_done(); 1729 #endif 1730 return; 1731 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1732 1733 #endif /* ENABLE_BLE */ 1734 1735 #ifdef ENABLE_SCO_OVER_HCI 1736 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1737 // skip write synchronous flow control if not supported 1738 if (hci_stack->local_supported_commands[0] & 0x04) break; 1739 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1740 // explicit fall through to reduce repetitions 1741 1742 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1743 // skip write default erroneous data reporting if not supported 1744 if (hci_stack->local_supported_commands[0] & 0x08) break; 1745 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1746 // explicit fall through to reduce repetitions 1747 1748 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1749 // skip bcm set sco pcm config on non-Broadcom chipsets 1750 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1751 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1752 // explicit fall through to reduce repetitions 1753 1754 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1755 if (!hci_le_supported()){ 1756 // SKIP LE init for Classic only configuration 1757 hci_init_done(); 1758 return; 1759 } 1760 break; 1761 1762 #else /* !ENABLE_SCO_OVER_HCI */ 1763 1764 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1765 #ifdef ENABLE_BLE 1766 if (hci_le_supported()){ 1767 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1768 return; 1769 } 1770 #endif 1771 // SKIP LE init for Classic only configuration 1772 hci_init_done(); 1773 return; 1774 #endif /* ENABLE_SCO_OVER_HCI */ 1775 1776 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1777 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1778 // Response to command before init done state -> init done 1779 case (HCI_INIT_DONE-1): 1780 hci_init_done(); 1781 return; 1782 #endif 1783 1784 default: 1785 break; 1786 } 1787 hci_initializing_next_state(); 1788 } 1789 1790 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1791 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1792 bd_addr_t bd_address; 1793 memcpy(&bd_address, conn->address, 6); 1794 1795 #ifdef ENABLE_CLASSIC 1796 // cache needed data 1797 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1798 #endif 1799 1800 // connection failed, remove entry 1801 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1802 btstack_memory_hci_connection_free( conn ); 1803 1804 #ifdef ENABLE_CLASSIC 1805 // notify client if dedicated bonding 1806 if (notify_dedicated_bonding_failed){ 1807 log_info("hci notify_dedicated_bonding_failed"); 1808 hci_emit_dedicated_bonding_result(bd_address, status); 1809 } 1810 1811 // if authentication error, also delete link key 1812 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1813 gap_drop_link_key_for_bd_addr(bd_address); 1814 } 1815 #endif 1816 } 1817 1818 static void event_handler(uint8_t *packet, int size){ 1819 1820 uint16_t event_length = packet[1]; 1821 1822 // assert packet is complete 1823 if (size != event_length + 2){ 1824 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1825 return; 1826 } 1827 1828 bd_addr_t addr; 1829 bd_addr_type_t addr_type; 1830 hci_con_handle_t handle; 1831 hci_connection_t * conn; 1832 int i; 1833 int create_connection_cmd; 1834 1835 #ifdef ENABLE_CLASSIC 1836 uint8_t link_type; 1837 #endif 1838 1839 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1840 1841 switch (hci_event_packet_get_type(packet)) { 1842 1843 case HCI_EVENT_COMMAND_COMPLETE: 1844 // get num cmd packets - limit to 1 to reduce complexity 1845 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1846 1847 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1848 if (packet[5]) break; 1849 // terminate, name 248 chars 1850 packet[6+248] = 0; 1851 log_info("local name: %s", &packet[6]); 1852 } 1853 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1854 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1855 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1856 uint16_t acl_len = little_endian_read_16(packet, 6); 1857 uint16_t sco_len = packet[8]; 1858 1859 // determine usable ACL/SCO payload size 1860 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1861 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1862 1863 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1864 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1865 1866 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1867 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1868 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1869 } 1870 } 1871 #ifdef ENABLE_BLE 1872 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1873 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1874 hci_stack->le_acl_packets_total_num = packet[8]; 1875 // determine usable ACL payload size 1876 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1877 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1878 } 1879 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1880 } 1881 #endif 1882 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1883 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1884 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1885 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1886 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); 1887 } 1888 #endif 1889 #ifdef ENABLE_LE_CENTRAL 1890 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1891 hci_stack->le_whitelist_capacity = packet[6]; 1892 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1893 } 1894 #endif 1895 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1896 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1897 hci_stack->local_bd_addr); 1898 log_info("Local Address, Status: 0x%02x: Addr: %s", 1899 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1900 #ifdef ENABLE_CLASSIC 1901 if (hci_stack->link_key_db){ 1902 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1903 } 1904 #endif 1905 } 1906 #ifdef ENABLE_CLASSIC 1907 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1908 hci_emit_discoverable_enabled(hci_stack->discoverable); 1909 } 1910 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1911 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1912 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1913 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1914 hci_emit_event(event, sizeof(event), 1); 1915 } 1916 } 1917 #endif 1918 1919 // Note: HCI init checks 1920 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1921 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1922 1923 #ifdef ENABLE_CLASSIC 1924 // determine usable ACL packet types based on host buffer size and supported features 1925 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1926 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1927 #endif 1928 // Classic/LE 1929 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1930 } 1931 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1932 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1933 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1934 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1935 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1936 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1937 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1938 } 1939 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1940 hci_stack->local_supported_commands[0] = 1941 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1942 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1943 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1944 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 1945 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 1946 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2; // bit 5 = Octet 35, bit 3 1947 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1948 } 1949 #ifdef ENABLE_CLASSIC 1950 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1951 if (packet[5] == 0){ 1952 hci_stack->synchronous_flow_control_enabled = 1; 1953 } 1954 } 1955 #endif 1956 break; 1957 1958 case HCI_EVENT_COMMAND_STATUS: 1959 // get num cmd packets - limit to 1 to reduce complexity 1960 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1961 1962 // check command status to detected failed outgoing connections 1963 create_connection_cmd = 0; 1964 #ifdef ENABLE_CLASSIC 1965 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 1966 create_connection_cmd = 1; 1967 } 1968 #endif 1969 #ifdef ENABLE_LE_CENTRAL 1970 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 1971 create_connection_cmd = 1; 1972 } 1973 #endif 1974 if (create_connection_cmd) { 1975 uint8_t status = hci_event_command_status_get_status(packet); 1976 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 1977 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); 1978 1979 // reset outgoing address info 1980 memset(hci_stack->outgoing_addr, 0, 6); 1981 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 1982 1983 // error => outgoing connection failed 1984 if ((conn != NULL) && (status != 0)){ 1985 hci_handle_connection_failed(conn, status); 1986 } 1987 } 1988 break; 1989 1990 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1991 int offset = 3; 1992 for (i=0; i<packet[2];i++){ 1993 handle = little_endian_read_16(packet, offset) & 0x0fff; 1994 offset += 2; 1995 uint16_t num_packets = little_endian_read_16(packet, offset); 1996 offset += 2; 1997 1998 conn = hci_connection_for_handle(handle); 1999 if (!conn){ 2000 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2001 continue; 2002 } 2003 2004 if (conn->address_type == BD_ADDR_TYPE_SCO){ 2005 #ifdef ENABLE_CLASSIC 2006 if (conn->num_sco_packets_sent >= num_packets){ 2007 conn->num_sco_packets_sent -= num_packets; 2008 } else { 2009 log_error("hci_number_completed_packets, more sco slots freed then sent."); 2010 conn->num_sco_packets_sent = 0; 2011 } 2012 hci_notify_if_sco_can_send_now(); 2013 #endif 2014 } else { 2015 if (conn->num_acl_packets_sent >= num_packets){ 2016 conn->num_acl_packets_sent -= num_packets; 2017 } else { 2018 log_error("hci_number_completed_packets, more acl slots freed then sent."); 2019 conn->num_acl_packets_sent = 0; 2020 } 2021 } 2022 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 2023 } 2024 break; 2025 } 2026 2027 #ifdef ENABLE_CLASSIC 2028 case HCI_EVENT_INQUIRY_COMPLETE: 2029 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2030 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2031 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2032 hci_emit_event(event, sizeof(event), 1); 2033 } 2034 break; 2035 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2036 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2037 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2038 } 2039 break; 2040 case HCI_EVENT_CONNECTION_REQUEST: 2041 reverse_bd_addr(&packet[2], addr); 2042 // TODO: eval COD 8-10 2043 link_type = packet[11]; 2044 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2045 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 2046 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2047 if (!conn) { 2048 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2049 } 2050 if (!conn) { 2051 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2052 hci_stack->decline_reason = 0x0d; 2053 bd_addr_copy(hci_stack->decline_addr, addr); 2054 break; 2055 } 2056 conn->role = HCI_ROLE_SLAVE; 2057 conn->state = RECEIVED_CONNECTION_REQUEST; 2058 // store info about eSCO 2059 if (link_type == 0x02){ 2060 conn->remote_supported_feature_eSCO = 1; 2061 } 2062 hci_run(); 2063 break; 2064 2065 case HCI_EVENT_CONNECTION_COMPLETE: 2066 // Connection management 2067 reverse_bd_addr(&packet[5], addr); 2068 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2069 addr_type = BD_ADDR_TYPE_CLASSIC; 2070 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2071 if (conn) { 2072 if (!packet[2]){ 2073 conn->state = OPEN; 2074 conn->con_handle = little_endian_read_16(packet, 3); 2075 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2076 2077 // restart timer 2078 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2079 btstack_run_loop_add_timer(&conn->timeout); 2080 2081 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2082 2083 hci_emit_nr_connections_changed(); 2084 } else { 2085 // connection failed 2086 hci_handle_connection_failed(conn, packet[2]); 2087 } 2088 } 2089 break; 2090 2091 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2092 reverse_bd_addr(&packet[5], addr); 2093 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2094 if (packet[2]){ 2095 // connection failed 2096 break; 2097 } 2098 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2099 if (!conn) { 2100 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2101 } 2102 if (!conn) { 2103 break; 2104 } 2105 conn->state = OPEN; 2106 conn->con_handle = little_endian_read_16(packet, 3); 2107 2108 #ifdef ENABLE_SCO_OVER_HCI 2109 // update SCO 2110 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2111 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2112 } 2113 #endif 2114 break; 2115 2116 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2117 handle = little_endian_read_16(packet, 3); 2118 conn = hci_connection_for_handle(handle); 2119 if (!conn) break; 2120 if (!packet[2]){ 2121 uint8_t * features = &packet[5]; 2122 if (features[6] & (1 << 3)){ 2123 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2124 } 2125 if (features[3] & (1<<7)){ 2126 conn->remote_supported_feature_eSCO = 1; 2127 } 2128 } 2129 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2130 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2131 if (conn->bonding_flags & BONDING_DEDICATED){ 2132 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2133 } 2134 break; 2135 2136 case HCI_EVENT_LINK_KEY_REQUEST: 2137 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2138 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2139 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2140 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2141 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2142 hci_run(); 2143 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2144 return; 2145 2146 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2147 reverse_bd_addr(&packet[2], addr); 2148 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2149 if (!conn) break; 2150 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2151 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2152 // Change Connection Encryption keeps link key type 2153 if (link_key_type != CHANGED_COMBINATION_KEY){ 2154 conn->link_key_type = link_key_type; 2155 } 2156 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2157 // still forward event to allow dismiss of pairing dialog 2158 break; 2159 } 2160 2161 case HCI_EVENT_PIN_CODE_REQUEST: 2162 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2163 // non-bondable mode: pin code negative reply will be sent 2164 if (!hci_stack->bondable){ 2165 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2166 hci_run(); 2167 return; 2168 } 2169 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2170 if (!hci_stack->link_key_db) break; 2171 hci_event_pin_code_request_get_bd_addr(packet, addr); 2172 hci_stack->link_key_db->delete_link_key(addr); 2173 break; 2174 2175 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2176 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2177 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2178 break; 2179 2180 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2181 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2182 if (!hci_stack->ssp_auto_accept) break; 2183 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2184 break; 2185 2186 case HCI_EVENT_USER_PASSKEY_REQUEST: 2187 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2188 if (!hci_stack->ssp_auto_accept) break; 2189 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2190 break; 2191 case HCI_EVENT_MODE_CHANGE: 2192 handle = hci_event_mode_change_get_handle(packet); 2193 conn = hci_connection_for_handle(handle); 2194 if (!conn) break; 2195 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2196 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2197 break; 2198 #endif 2199 2200 case HCI_EVENT_ENCRYPTION_CHANGE: 2201 handle = little_endian_read_16(packet, 3); 2202 conn = hci_connection_for_handle(handle); 2203 if (!conn) break; 2204 if (packet[2] == 0) { 2205 if (packet[5]){ 2206 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2207 } else { 2208 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2209 } 2210 } 2211 #ifdef ENABLE_CLASSIC 2212 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2213 #endif 2214 break; 2215 2216 #ifdef ENABLE_CLASSIC 2217 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2218 handle = little_endian_read_16(packet, 3); 2219 conn = hci_connection_for_handle(handle); 2220 if (!conn) break; 2221 2222 // dedicated bonding: send result and disconnect 2223 if (conn->bonding_flags & BONDING_DEDICATED){ 2224 conn->bonding_flags &= ~BONDING_DEDICATED; 2225 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2226 conn->bonding_status = packet[2]; 2227 break; 2228 } 2229 2230 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2231 // link key sufficient for requested security 2232 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2233 break; 2234 } 2235 // not enough 2236 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2237 break; 2238 #endif 2239 2240 // HCI_EVENT_DISCONNECTION_COMPLETE 2241 // has been split, to first notify stack before shutting connection down 2242 // see end of function, too. 2243 case HCI_EVENT_DISCONNECTION_COMPLETE: 2244 if (packet[2]) break; // status != 0 2245 handle = little_endian_read_16(packet, 3); 2246 // drop outgoing ACL fragments if it is for closed connection 2247 if (hci_stack->acl_fragmentation_total_size > 0) { 2248 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2249 log_info("hci: drop fragmented ACL data for closed connection"); 2250 hci_stack->acl_fragmentation_total_size = 0; 2251 hci_stack->acl_fragmentation_pos = 0; 2252 } 2253 } 2254 2255 // re-enable advertisements for le connections if active 2256 conn = hci_connection_for_handle(handle); 2257 if (!conn) break; 2258 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2259 #ifdef ENABLE_BLE 2260 #ifdef ENABLE_LE_PERIPHERAL 2261 if (hci_is_le_connection(conn)){ 2262 hci_reenable_advertisements_if_needed(); 2263 } 2264 #endif 2265 #endif 2266 break; 2267 2268 case HCI_EVENT_HARDWARE_ERROR: 2269 log_error("Hardware Error: 0x%02x", packet[2]); 2270 if (hci_stack->hardware_error_callback){ 2271 (*hci_stack->hardware_error_callback)(packet[2]); 2272 } else { 2273 // if no special requests, just reboot stack 2274 hci_power_control_off(); 2275 hci_power_control_on(); 2276 } 2277 break; 2278 2279 #ifdef ENABLE_CLASSIC 2280 case HCI_EVENT_ROLE_CHANGE: 2281 if (packet[2]) break; // status != 0 2282 reverse_bd_addr(&packet[3], addr); 2283 addr_type = BD_ADDR_TYPE_CLASSIC; 2284 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2285 if (!conn) break; 2286 conn->role = packet[9]; 2287 break; 2288 #endif 2289 2290 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2291 // release packet buffer only for asynchronous transport and if there are not further fragements 2292 if (hci_transport_synchronous()) { 2293 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2294 return; // instead of break: to avoid re-entering hci_run() 2295 } 2296 if (hci_stack->acl_fragmentation_total_size) break; 2297 hci_release_packet_buffer(); 2298 2299 // L2CAP receives this event via the hci_emit_event below 2300 2301 #ifdef ENABLE_CLASSIC 2302 // For SCO, we do the can_send_now_check here 2303 hci_notify_if_sco_can_send_now(); 2304 #endif 2305 break; 2306 2307 #ifdef ENABLE_CLASSIC 2308 case HCI_EVENT_SCO_CAN_SEND_NOW: 2309 // For SCO, we do the can_send_now_check here 2310 hci_notify_if_sco_can_send_now(); 2311 return; 2312 2313 // explode inquriy results for easier consumption 2314 case HCI_EVENT_INQUIRY_RESULT: 2315 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2316 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2317 gap_inquiry_explode(packet); 2318 break; 2319 #endif 2320 2321 #ifdef ENABLE_BLE 2322 case HCI_EVENT_LE_META: 2323 switch (packet[2]){ 2324 #ifdef ENABLE_LE_CENTRAL 2325 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2326 // log_info("advertising report received"); 2327 if (!hci_stack->le_scanning_enabled) break; 2328 le_handle_advertisement_report(packet, size); 2329 break; 2330 #endif 2331 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2332 // Connection management 2333 reverse_bd_addr(&packet[8], addr); 2334 addr_type = (bd_addr_type_t)packet[7]; 2335 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2336 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2337 2338 #ifdef ENABLE_LE_CENTRAL 2339 // if auto-connect, remove from whitelist in both roles 2340 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2341 hci_remove_from_whitelist(addr_type, addr); 2342 } 2343 // handle error: error is reported only to the initiator -> outgoing connection 2344 if (packet[3]){ 2345 2346 // handle cancelled outgoing connection 2347 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2348 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2349 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2350 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2351 conn = gap_get_outgoing_connection(); 2352 } 2353 2354 // outgoing connection establishment is done 2355 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2356 // remove entry 2357 if (conn){ 2358 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2359 btstack_memory_hci_connection_free( conn ); 2360 } 2361 break; 2362 } 2363 #endif 2364 // on success, both hosts receive connection complete event 2365 if (packet[6] == HCI_ROLE_MASTER){ 2366 #ifdef ENABLE_LE_CENTRAL 2367 // if we're master, it was an outgoing connection and we're done with it 2368 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2369 #endif 2370 } else { 2371 #ifdef ENABLE_LE_PERIPHERAL 2372 // if we're slave, it was an incoming connection, advertisements have stopped 2373 hci_stack->le_advertisements_active = 0; 2374 #endif 2375 } 2376 // LE connections are auto-accepted, so just create a connection if there isn't one already 2377 if (!conn){ 2378 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2379 } 2380 // no memory, sorry. 2381 if (!conn){ 2382 break; 2383 } 2384 2385 conn->state = OPEN; 2386 conn->role = packet[6]; 2387 conn->con_handle = little_endian_read_16(packet, 4); 2388 2389 #ifdef ENABLE_LE_PERIPHERAL 2390 if (packet[6] == HCI_ROLE_SLAVE){ 2391 hci_reenable_advertisements_if_needed(); 2392 } 2393 #endif 2394 2395 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2396 2397 // restart timer 2398 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2399 // btstack_run_loop_add_timer(&conn->timeout); 2400 2401 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2402 2403 hci_emit_nr_connections_changed(); 2404 break; 2405 2406 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2407 2408 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2409 // connection 2410 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2411 conn = hci_connection_for_handle(handle); 2412 if (conn) { 2413 // read arguments 2414 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2415 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2416 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2417 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2418 2419 // validate against current connection parameter range 2420 le_connection_parameter_range_t existing_range; 2421 gap_get_connection_parameter_range(&existing_range); 2422 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2423 if (update_parameter){ 2424 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2425 conn->le_conn_interval_min = le_conn_interval_min; 2426 conn->le_conn_interval_max = le_conn_interval_max; 2427 conn->le_conn_latency = le_conn_latency; 2428 conn->le_supervision_timeout = le_supervision_timeout; 2429 } else { 2430 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2431 } 2432 } 2433 break; 2434 default: 2435 break; 2436 } 2437 break; 2438 #endif 2439 case HCI_EVENT_VENDOR_SPECIFIC: 2440 // Vendor specific commands often create vendor specific event instead of num completed packets 2441 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2442 switch (hci_stack->manufacturer){ 2443 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2444 hci_stack->num_cmd_packets = 1; 2445 break; 2446 default: 2447 break; 2448 } 2449 break; 2450 default: 2451 break; 2452 } 2453 2454 // handle BT initialization 2455 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2456 hci_initializing_event_handler(packet, size); 2457 } 2458 2459 // help with BT sleep 2460 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2461 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2462 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2463 hci_initializing_next_state(); 2464 } 2465 2466 // notify upper stack 2467 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2468 2469 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2470 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2471 if (!packet[2]){ 2472 handle = little_endian_read_16(packet, 3); 2473 hci_connection_t * aConn = hci_connection_for_handle(handle); 2474 if (aConn) { 2475 uint8_t status = aConn->bonding_status; 2476 uint16_t flags = aConn->bonding_flags; 2477 bd_addr_t bd_address; 2478 memcpy(&bd_address, aConn->address, 6); 2479 hci_shutdown_connection(aConn); 2480 // connection struct is gone, don't access anymore 2481 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2482 hci_emit_dedicated_bonding_result(bd_address, status); 2483 } 2484 } 2485 } 2486 } 2487 2488 // execute main loop 2489 hci_run(); 2490 } 2491 2492 #ifdef ENABLE_CLASSIC 2493 static void sco_handler(uint8_t * packet, uint16_t size){ 2494 if (!hci_stack->sco_packet_handler) return; 2495 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2496 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2497 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2498 hci_connection_t *conn = hci_connection_for_handle(con_handle); 2499 if (conn){ 2500 conn->num_packets_completed++; 2501 hci_stack->host_completed_packets = 1; 2502 hci_run(); 2503 } 2504 #endif 2505 } 2506 #endif 2507 2508 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2509 hci_dump_packet(packet_type, 1, packet, size); 2510 switch (packet_type) { 2511 case HCI_EVENT_PACKET: 2512 event_handler(packet, size); 2513 break; 2514 case HCI_ACL_DATA_PACKET: 2515 acl_handler(packet, size); 2516 break; 2517 #ifdef ENABLE_CLASSIC 2518 case HCI_SCO_DATA_PACKET: 2519 sco_handler(packet, size); 2520 break; 2521 #endif 2522 default: 2523 break; 2524 } 2525 } 2526 2527 /** 2528 * @brief Add event packet handler. 2529 */ 2530 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2531 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2532 } 2533 2534 2535 /** Register HCI packet handlers */ 2536 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2537 hci_stack->acl_packet_handler = handler; 2538 } 2539 2540 #ifdef ENABLE_CLASSIC 2541 /** 2542 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2543 */ 2544 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2545 hci_stack->sco_packet_handler = handler; 2546 } 2547 #endif 2548 2549 static void hci_state_reset(void){ 2550 // no connections yet 2551 hci_stack->connections = NULL; 2552 2553 // keep discoverable/connectable as this has been requested by the client(s) 2554 // hci_stack->discoverable = 0; 2555 // hci_stack->connectable = 0; 2556 // hci_stack->bondable = 1; 2557 // hci_stack->own_addr_type = 0; 2558 2559 // buffer is free 2560 hci_stack->hci_packet_buffer_reserved = 0; 2561 2562 // no pending cmds 2563 hci_stack->decline_reason = 0; 2564 hci_stack->new_scan_enable_value = 0xff; 2565 2566 // LE 2567 #ifdef ENABLE_BLE 2568 memset(hci_stack->le_random_address, 0, 6); 2569 hci_stack->le_random_address_set = 0; 2570 #endif 2571 #ifdef ENABLE_LE_CENTRAL 2572 hci_stack->le_scanning_active = 0; 2573 hci_stack->le_scan_type = 0xff; 2574 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2575 hci_stack->le_whitelist = 0; 2576 hci_stack->le_whitelist_capacity = 0; 2577 #endif 2578 } 2579 2580 #ifdef ENABLE_CLASSIC 2581 /** 2582 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2583 */ 2584 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2585 // store and open remote device db 2586 hci_stack->link_key_db = link_key_db; 2587 if (hci_stack->link_key_db) { 2588 hci_stack->link_key_db->open(); 2589 } 2590 } 2591 #endif 2592 2593 void hci_init(const hci_transport_t *transport, const void *config){ 2594 2595 #ifdef HAVE_MALLOC 2596 if (!hci_stack) { 2597 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2598 } 2599 #else 2600 hci_stack = &hci_stack_static; 2601 #endif 2602 memset(hci_stack, 0, sizeof(hci_stack_t)); 2603 2604 // reference to use transport layer implementation 2605 hci_stack->hci_transport = transport; 2606 2607 // reference to used config 2608 hci_stack->config = config; 2609 2610 // setup pointer for outgoing packet buffer 2611 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2612 2613 // max acl payload size defined in config.h 2614 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2615 2616 // register packet handlers with transport 2617 transport->register_packet_handler(&packet_handler); 2618 2619 hci_stack->state = HCI_STATE_OFF; 2620 2621 // class of device 2622 hci_stack->class_of_device = 0x007a020c; // Smartphone 2623 2624 // bondable by default 2625 hci_stack->bondable = 1; 2626 2627 #ifdef ENABLE_CLASSIC 2628 // classic name 2629 hci_stack->local_name = default_classic_name; 2630 2631 // Master slave policy 2632 hci_stack->master_slave_policy = 1; 2633 #endif 2634 2635 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2636 hci_stack->ssp_enable = 1; 2637 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2638 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2639 hci_stack->ssp_auto_accept = 1; 2640 2641 // voice setting - signed 16 bit pcm data with CVSD over the air 2642 hci_stack->sco_voice_setting = 0x60; 2643 2644 #ifdef ENABLE_LE_CENTRAL 2645 // connection parameter to use for outgoing connections 2646 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2647 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2648 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2649 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2650 hci_stack->le_connection_latency = 4; // 4 2651 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2652 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2653 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2654 #endif 2655 2656 #ifdef ENABLE_LE_PERIPHERAL 2657 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2658 #endif 2659 2660 // connection parameter range used to answer connection parameter update requests in l2cap 2661 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2662 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2663 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2664 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2665 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2666 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2667 2668 hci_state_reset(); 2669 } 2670 2671 /** 2672 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2673 */ 2674 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2675 hci_stack->chipset = chipset_driver; 2676 2677 // reset chipset driver - init is also called on power_up 2678 if (hci_stack->chipset && hci_stack->chipset->init){ 2679 hci_stack->chipset->init(hci_stack->config); 2680 } 2681 } 2682 2683 /** 2684 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2685 */ 2686 void hci_set_control(const btstack_control_t *hardware_control){ 2687 // references to used control implementation 2688 hci_stack->control = hardware_control; 2689 // init with transport config 2690 hardware_control->init(hci_stack->config); 2691 } 2692 2693 void hci_close(void){ 2694 // close remote device db 2695 if (hci_stack->link_key_db) { 2696 hci_stack->link_key_db->close(); 2697 } 2698 2699 btstack_linked_list_iterator_t lit; 2700 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2701 while (btstack_linked_list_iterator_has_next(&lit)){ 2702 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2703 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2704 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2705 hci_shutdown_connection(connection); 2706 } 2707 2708 hci_power_control(HCI_POWER_OFF); 2709 2710 #ifdef HAVE_MALLOC 2711 free(hci_stack); 2712 #endif 2713 hci_stack = NULL; 2714 } 2715 2716 #ifdef ENABLE_CLASSIC 2717 void gap_set_class_of_device(uint32_t class_of_device){ 2718 hci_stack->class_of_device = class_of_device; 2719 } 2720 2721 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 2722 hci_stack->default_link_policy_settings = default_link_policy_settings; 2723 } 2724 2725 void hci_disable_l2cap_timeout_check(void){ 2726 disable_l2cap_timeouts = 1; 2727 } 2728 #endif 2729 2730 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2731 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2732 void hci_set_bd_addr(bd_addr_t addr){ 2733 memcpy(hci_stack->custom_bd_addr, addr, 6); 2734 hci_stack->custom_bd_addr_set = 1; 2735 } 2736 #endif 2737 2738 // State-Module-Driver overview 2739 // state module low-level 2740 // HCI_STATE_OFF off close 2741 // HCI_STATE_INITIALIZING, on open 2742 // HCI_STATE_WORKING, on open 2743 // HCI_STATE_HALTING, on open 2744 // HCI_STATE_SLEEPING, off/sleep close 2745 // HCI_STATE_FALLING_ASLEEP on open 2746 2747 static int hci_power_control_on(void){ 2748 2749 // power on 2750 int err = 0; 2751 if (hci_stack->control && hci_stack->control->on){ 2752 err = (*hci_stack->control->on)(); 2753 } 2754 if (err){ 2755 log_error( "POWER_ON failed"); 2756 hci_emit_hci_open_failed(); 2757 return err; 2758 } 2759 2760 // int chipset driver 2761 if (hci_stack->chipset && hci_stack->chipset->init){ 2762 hci_stack->chipset->init(hci_stack->config); 2763 } 2764 2765 // init transport 2766 if (hci_stack->hci_transport->init){ 2767 hci_stack->hci_transport->init(hci_stack->config); 2768 } 2769 2770 // open transport 2771 err = hci_stack->hci_transport->open(); 2772 if (err){ 2773 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2774 if (hci_stack->control && hci_stack->control->off){ 2775 (*hci_stack->control->off)(); 2776 } 2777 hci_emit_hci_open_failed(); 2778 return err; 2779 } 2780 return 0; 2781 } 2782 2783 static void hci_power_control_off(void){ 2784 2785 log_info("hci_power_control_off"); 2786 2787 // close low-level device 2788 hci_stack->hci_transport->close(); 2789 2790 log_info("hci_power_control_off - hci_transport closed"); 2791 2792 // power off 2793 if (hci_stack->control && hci_stack->control->off){ 2794 (*hci_stack->control->off)(); 2795 } 2796 2797 log_info("hci_power_control_off - control closed"); 2798 2799 hci_stack->state = HCI_STATE_OFF; 2800 } 2801 2802 static void hci_power_control_sleep(void){ 2803 2804 log_info("hci_power_control_sleep"); 2805 2806 #if 0 2807 // don't close serial port during sleep 2808 2809 // close low-level device 2810 hci_stack->hci_transport->close(hci_stack->config); 2811 #endif 2812 2813 // sleep mode 2814 if (hci_stack->control && hci_stack->control->sleep){ 2815 (*hci_stack->control->sleep)(); 2816 } 2817 2818 hci_stack->state = HCI_STATE_SLEEPING; 2819 } 2820 2821 static int hci_power_control_wake(void){ 2822 2823 log_info("hci_power_control_wake"); 2824 2825 // wake on 2826 if (hci_stack->control && hci_stack->control->wake){ 2827 (*hci_stack->control->wake)(); 2828 } 2829 2830 #if 0 2831 // open low-level device 2832 int err = hci_stack->hci_transport->open(hci_stack->config); 2833 if (err){ 2834 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2835 if (hci_stack->control && hci_stack->control->off){ 2836 (*hci_stack->control->off)(); 2837 } 2838 hci_emit_hci_open_failed(); 2839 return err; 2840 } 2841 #endif 2842 2843 return 0; 2844 } 2845 2846 static void hci_power_transition_to_initializing(void){ 2847 // set up state machine 2848 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2849 hci_stack->hci_packet_buffer_reserved = 0; 2850 hci_stack->state = HCI_STATE_INITIALIZING; 2851 hci_stack->substate = HCI_INIT_SEND_RESET; 2852 } 2853 2854 int hci_power_control(HCI_POWER_MODE power_mode){ 2855 2856 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2857 2858 int err = 0; 2859 switch (hci_stack->state){ 2860 2861 case HCI_STATE_OFF: 2862 switch (power_mode){ 2863 case HCI_POWER_ON: 2864 err = hci_power_control_on(); 2865 if (err) { 2866 log_error("hci_power_control_on() error %d", err); 2867 return err; 2868 } 2869 hci_power_transition_to_initializing(); 2870 break; 2871 case HCI_POWER_OFF: 2872 // do nothing 2873 break; 2874 case HCI_POWER_SLEEP: 2875 // do nothing (with SLEEP == OFF) 2876 break; 2877 } 2878 break; 2879 2880 case HCI_STATE_INITIALIZING: 2881 switch (power_mode){ 2882 case HCI_POWER_ON: 2883 // do nothing 2884 break; 2885 case HCI_POWER_OFF: 2886 // no connections yet, just turn it off 2887 hci_power_control_off(); 2888 break; 2889 case HCI_POWER_SLEEP: 2890 // no connections yet, just turn it off 2891 hci_power_control_sleep(); 2892 break; 2893 } 2894 break; 2895 2896 case HCI_STATE_WORKING: 2897 switch (power_mode){ 2898 case HCI_POWER_ON: 2899 // do nothing 2900 break; 2901 case HCI_POWER_OFF: 2902 // see hci_run 2903 hci_stack->state = HCI_STATE_HALTING; 2904 break; 2905 case HCI_POWER_SLEEP: 2906 // see hci_run 2907 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2908 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2909 break; 2910 } 2911 break; 2912 2913 case HCI_STATE_HALTING: 2914 switch (power_mode){ 2915 case HCI_POWER_ON: 2916 hci_power_transition_to_initializing(); 2917 break; 2918 case HCI_POWER_OFF: 2919 // do nothing 2920 break; 2921 case HCI_POWER_SLEEP: 2922 // see hci_run 2923 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2924 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2925 break; 2926 } 2927 break; 2928 2929 case HCI_STATE_FALLING_ASLEEP: 2930 switch (power_mode){ 2931 case HCI_POWER_ON: 2932 2933 #ifdef HAVE_PLATFORM_IPHONE_OS 2934 // nothing to do, if H4 supports power management 2935 if (btstack_control_iphone_power_management_enabled()){ 2936 hci_stack->state = HCI_STATE_INITIALIZING; 2937 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2938 break; 2939 } 2940 #endif 2941 hci_power_transition_to_initializing(); 2942 break; 2943 case HCI_POWER_OFF: 2944 // see hci_run 2945 hci_stack->state = HCI_STATE_HALTING; 2946 break; 2947 case HCI_POWER_SLEEP: 2948 // do nothing 2949 break; 2950 } 2951 break; 2952 2953 case HCI_STATE_SLEEPING: 2954 switch (power_mode){ 2955 case HCI_POWER_ON: 2956 2957 #ifdef HAVE_PLATFORM_IPHONE_OS 2958 // nothing to do, if H4 supports power management 2959 if (btstack_control_iphone_power_management_enabled()){ 2960 hci_stack->state = HCI_STATE_INITIALIZING; 2961 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2962 hci_update_scan_enable(); 2963 break; 2964 } 2965 #endif 2966 err = hci_power_control_wake(); 2967 if (err) return err; 2968 hci_power_transition_to_initializing(); 2969 break; 2970 case HCI_POWER_OFF: 2971 hci_stack->state = HCI_STATE_HALTING; 2972 break; 2973 case HCI_POWER_SLEEP: 2974 // do nothing 2975 break; 2976 } 2977 break; 2978 } 2979 2980 // create internal event 2981 hci_emit_state(); 2982 2983 // trigger next/first action 2984 hci_run(); 2985 2986 return 0; 2987 } 2988 2989 2990 #ifdef ENABLE_CLASSIC 2991 2992 static void hci_update_scan_enable(void){ 2993 // 2 = page scan, 1 = inq scan 2994 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2995 hci_run(); 2996 } 2997 2998 void gap_discoverable_control(uint8_t enable){ 2999 if (enable) enable = 1; // normalize argument 3000 3001 if (hci_stack->discoverable == enable){ 3002 hci_emit_discoverable_enabled(hci_stack->discoverable); 3003 return; 3004 } 3005 3006 hci_stack->discoverable = enable; 3007 hci_update_scan_enable(); 3008 } 3009 3010 void gap_connectable_control(uint8_t enable){ 3011 if (enable) enable = 1; // normalize argument 3012 3013 // don't emit event 3014 if (hci_stack->connectable == enable) return; 3015 3016 hci_stack->connectable = enable; 3017 hci_update_scan_enable(); 3018 } 3019 #endif 3020 3021 void gap_local_bd_addr(bd_addr_t address_buffer){ 3022 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3023 } 3024 3025 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3026 static void hci_host_num_completed_packets(void){ 3027 3028 // create packet manually as arrays are not supported and num_commands should not get reduced 3029 hci_reserve_packet_buffer(); 3030 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3031 3032 uint16_t size = 0; 3033 uint16_t num_handles = 0; 3034 packet[size++] = 0x35; 3035 packet[size++] = 0x0c; 3036 size++; // skip param len 3037 size++; // skip num handles 3038 3039 // add { handle, packets } entries 3040 btstack_linked_item_t * it; 3041 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3042 hci_connection_t * connection = (hci_connection_t *) it; 3043 if (connection->num_packets_completed){ 3044 little_endian_store_16(packet, size, connection->con_handle); 3045 size += 2; 3046 little_endian_store_16(packet, size, connection->num_packets_completed); 3047 size += 2; 3048 // 3049 num_handles++; 3050 connection->num_packets_completed = 0; 3051 } 3052 } 3053 3054 packet[2] = size - 3; 3055 packet[3] = num_handles; 3056 3057 hci_stack->host_completed_packets = 0; 3058 3059 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3060 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3061 3062 // release packet buffer for synchronous transport implementations 3063 if (hci_transport_synchronous()){ 3064 hci_release_packet_buffer(); 3065 hci_emit_transport_packet_sent(); 3066 } 3067 } 3068 #endif 3069 3070 static void hci_run(void){ 3071 3072 // log_info("hci_run: entered"); 3073 btstack_linked_item_t * it; 3074 3075 // send continuation fragments first, as they block the prepared packet buffer 3076 if (hci_stack->acl_fragmentation_total_size > 0) { 3077 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3078 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3079 if (connection) { 3080 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3081 hci_send_acl_packet_fragments(connection); 3082 return; 3083 } 3084 } else { 3085 // connection gone -> discard further fragments 3086 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3087 hci_stack->acl_fragmentation_total_size = 0; 3088 hci_stack->acl_fragmentation_pos = 0; 3089 } 3090 } 3091 3092 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3093 // send host num completed packets next as they don't require num_cmd_packets > 0 3094 if (!hci_can_send_comand_packet_transport()) return; 3095 if (hci_stack->host_completed_packets){ 3096 hci_host_num_completed_packets(); 3097 return; 3098 } 3099 #endif 3100 3101 if (!hci_can_send_command_packet_now()) return; 3102 3103 // global/non-connection oriented commands 3104 3105 #ifdef ENABLE_CLASSIC 3106 // decline incoming connections 3107 if (hci_stack->decline_reason){ 3108 uint8_t reason = hci_stack->decline_reason; 3109 hci_stack->decline_reason = 0; 3110 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3111 return; 3112 } 3113 // send scan enable 3114 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 3115 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3116 hci_stack->new_scan_enable_value = 0xff; 3117 return; 3118 } 3119 // start/stop inquiry 3120 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 3121 uint8_t duration = hci_stack->inquiry_state; 3122 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3123 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3124 return; 3125 } 3126 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3127 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3128 hci_send_cmd(&hci_inquiry_cancel); 3129 return; 3130 } 3131 // remote name request 3132 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3133 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3134 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3135 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3136 return; 3137 } 3138 // pairing 3139 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3140 uint8_t state = hci_stack->gap_pairing_state; 3141 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3142 switch (state){ 3143 case GAP_PAIRING_STATE_SEND_PIN: 3144 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); 3145 break; 3146 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3147 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3148 break; 3149 case GAP_PAIRING_STATE_SEND_PASSKEY: 3150 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3151 break; 3152 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3153 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3154 break; 3155 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3156 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3157 break; 3158 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3159 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3160 break; 3161 default: 3162 break; 3163 } 3164 return; 3165 } 3166 #endif 3167 3168 #ifdef ENABLE_BLE 3169 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 3170 if ((hci_stack->state == HCI_STATE_WORKING) 3171 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 3172 3173 #ifdef ENABLE_LE_CENTRAL 3174 // handle le scan 3175 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3176 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3177 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3178 return; 3179 } 3180 if (hci_stack->le_scan_type != 0xff){ 3181 // defaults: active scanning, accept all advertisement packets 3182 int scan_type = hci_stack->le_scan_type; 3183 hci_stack->le_scan_type = 0xff; 3184 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); 3185 return; 3186 } 3187 #endif 3188 #ifdef ENABLE_LE_PERIPHERAL 3189 // le advertisement control 3190 if (hci_stack->le_advertisements_todo){ 3191 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3192 } 3193 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3194 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3195 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3196 return; 3197 } 3198 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3199 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3200 hci_send_cmd(&hci_le_set_advertising_parameters, 3201 hci_stack->le_advertisements_interval_min, 3202 hci_stack->le_advertisements_interval_max, 3203 hci_stack->le_advertisements_type, 3204 hci_stack->le_own_addr_type, 3205 hci_stack->le_advertisements_direct_address_type, 3206 hci_stack->le_advertisements_direct_address, 3207 hci_stack->le_advertisements_channel_map, 3208 hci_stack->le_advertisements_filter_policy); 3209 return; 3210 } 3211 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3212 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3213 uint8_t adv_data_clean[31]; 3214 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3215 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3216 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3217 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3218 return; 3219 } 3220 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3221 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3222 uint8_t scan_data_clean[31]; 3223 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3224 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3225 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3226 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, hci_stack->le_scan_response_data); 3227 return; 3228 } 3229 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3230 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3231 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3232 return; 3233 } 3234 #endif 3235 3236 #ifdef ENABLE_LE_CENTRAL 3237 // 3238 // LE Whitelist Management 3239 // 3240 3241 // check if whitelist needs modification 3242 btstack_linked_list_iterator_t lit; 3243 int modification_pending = 0; 3244 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3245 while (btstack_linked_list_iterator_has_next(&lit)){ 3246 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3247 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3248 modification_pending = 1; 3249 break; 3250 } 3251 } 3252 3253 if (modification_pending){ 3254 // stop connnecting if modification pending 3255 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3256 hci_send_cmd(&hci_le_create_connection_cancel); 3257 return; 3258 } 3259 3260 // add/remove entries 3261 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3262 while (btstack_linked_list_iterator_has_next(&lit)){ 3263 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3264 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3265 entry->state = LE_WHITELIST_ON_CONTROLLER; 3266 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3267 return; 3268 3269 } 3270 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3271 bd_addr_t address; 3272 bd_addr_type_t address_type = entry->address_type; 3273 memcpy(address, entry->address, 6); 3274 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3275 btstack_memory_whitelist_entry_free(entry); 3276 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3277 return; 3278 } 3279 } 3280 } 3281 3282 // start connecting 3283 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3284 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3285 bd_addr_t null_addr; 3286 memset(null_addr, 0, 6); 3287 hci_send_cmd(&hci_le_create_connection, 3288 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3289 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3290 1, // use whitelist 3291 0, // peer address type 3292 null_addr, // peer bd addr 3293 hci_stack->le_own_addr_type, // our addr type: 3294 hci_stack->le_connection_interval_min, // conn interval min 3295 hci_stack->le_connection_interval_max, // conn interval max 3296 hci_stack->le_connection_latency, // conn latency 3297 hci_stack->le_supervision_timeout, // conn latency 3298 hci_stack->le_minimum_ce_length, // min ce length 3299 hci_stack->le_maximum_ce_length // max ce length 3300 ); 3301 return; 3302 } 3303 #endif 3304 } 3305 #endif 3306 3307 // send pending HCI commands 3308 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3309 hci_connection_t * connection = (hci_connection_t *) it; 3310 3311 switch(connection->state){ 3312 case SEND_CREATE_CONNECTION: 3313 switch(connection->address_type){ 3314 #ifdef ENABLE_CLASSIC 3315 case BD_ADDR_TYPE_CLASSIC: 3316 log_info("sending hci_create_connection"); 3317 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3318 break; 3319 #endif 3320 default: 3321 #ifdef ENABLE_BLE 3322 #ifdef ENABLE_LE_CENTRAL 3323 // track outgoing connection 3324 hci_stack->outgoing_addr_type = connection->address_type; 3325 memcpy(hci_stack->outgoing_addr, connection->address, 6); 3326 log_info("sending hci_le_create_connection"); 3327 hci_send_cmd(&hci_le_create_connection, 3328 hci_stack->le_connection_scan_interval, // conn scan interval 3329 hci_stack->le_connection_scan_window, // conn scan windows 3330 0, // don't use whitelist 3331 connection->address_type, // peer address type 3332 connection->address, // peer bd addr 3333 hci_stack->le_own_addr_type, // our addr type: 3334 hci_stack->le_connection_interval_min, // conn interval min 3335 hci_stack->le_connection_interval_max, // conn interval max 3336 hci_stack->le_connection_latency, // conn latency 3337 hci_stack->le_supervision_timeout, // conn latency 3338 hci_stack->le_minimum_ce_length, // min ce length 3339 hci_stack->le_maximum_ce_length // max ce length 3340 ); 3341 connection->state = SENT_CREATE_CONNECTION; 3342 #endif 3343 #endif 3344 break; 3345 } 3346 return; 3347 3348 #ifdef ENABLE_CLASSIC 3349 case RECEIVED_CONNECTION_REQUEST: 3350 connection->role = HCI_ROLE_SLAVE; 3351 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3352 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3353 connection->state = ACCEPTED_CONNECTION_REQUEST; 3354 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3355 } 3356 return; 3357 #endif 3358 3359 #ifdef ENABLE_BLE 3360 #ifdef ENABLE_LE_CENTRAL 3361 case SEND_CANCEL_CONNECTION: 3362 connection->state = SENT_CANCEL_CONNECTION; 3363 hci_send_cmd(&hci_le_create_connection_cancel); 3364 return; 3365 #endif 3366 #endif 3367 case SEND_DISCONNECT: 3368 connection->state = SENT_DISCONNECT; 3369 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3370 return; 3371 3372 default: 3373 break; 3374 } 3375 3376 // no further commands if connection is about to get shut down 3377 if (connection->state == SENT_DISCONNECT) continue; 3378 3379 #ifdef ENABLE_CLASSIC 3380 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3381 log_info("responding to link key request"); 3382 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3383 link_key_t link_key; 3384 link_key_type_t link_key_type; 3385 if ( hci_stack->link_key_db 3386 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3387 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3388 connection->link_key_type = link_key_type; 3389 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3390 } else { 3391 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3392 } 3393 return; 3394 } 3395 3396 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3397 log_info("denying to pin request"); 3398 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3399 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3400 return; 3401 } 3402 3403 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3404 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3405 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3406 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3407 // tweak authentication requirements 3408 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3409 if (connection->bonding_flags & BONDING_DEDICATED){ 3410 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3411 } 3412 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3413 authreq |= 1; 3414 } 3415 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3416 } else { 3417 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3418 } 3419 return; 3420 } 3421 3422 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3423 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3424 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3425 return; 3426 } 3427 3428 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3429 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3430 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3431 return; 3432 } 3433 3434 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3435 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3436 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3437 return; 3438 } 3439 3440 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3441 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3442 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3443 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3444 return; 3445 } 3446 3447 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3448 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3449 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3450 return; 3451 } 3452 3453 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3454 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3455 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3456 return; 3457 } 3458 #endif 3459 3460 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3461 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3462 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3463 return; 3464 } 3465 3466 #ifdef ENABLE_CLASSIC 3467 uint16_t sniff_min_interval; 3468 switch (connection->sniff_min_interval){ 3469 case 0: 3470 break; 3471 case 0xffff: 3472 connection->sniff_min_interval = 0; 3473 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3474 return; 3475 default: 3476 sniff_min_interval = connection->sniff_min_interval; 3477 connection->sniff_min_interval = 0; 3478 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3479 break; 3480 } 3481 #endif 3482 3483 #ifdef ENABLE_BLE 3484 switch (connection->le_con_parameter_update_state){ 3485 // response to L2CAP CON PARAMETER UPDATE REQUEST 3486 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3487 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3488 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3489 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3490 0x0000, 0xffff); 3491 break; 3492 case CON_PARAMETER_UPDATE_REPLY: 3493 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3494 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3495 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3496 0x0000, 0xffff); 3497 break; 3498 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3499 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3500 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3501 break; 3502 default: 3503 break; 3504 } 3505 #endif 3506 } 3507 3508 hci_connection_t * connection; 3509 switch (hci_stack->state){ 3510 case HCI_STATE_INITIALIZING: 3511 hci_initializing_run(); 3512 break; 3513 3514 case HCI_STATE_HALTING: 3515 3516 log_info("HCI_STATE_HALTING"); 3517 3518 // free whitelist entries 3519 #ifdef ENABLE_BLE 3520 #ifdef ENABLE_LE_CENTRAL 3521 { 3522 btstack_linked_list_iterator_t lit; 3523 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3524 while (btstack_linked_list_iterator_has_next(&lit)){ 3525 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3526 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3527 btstack_memory_whitelist_entry_free(entry); 3528 } 3529 } 3530 #endif 3531 #endif 3532 // close all open connections 3533 connection = (hci_connection_t *) hci_stack->connections; 3534 if (connection){ 3535 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3536 if (!hci_can_send_command_packet_now()) return; 3537 3538 // check state 3539 if (connection->state == SENT_DISCONNECT) return; 3540 connection->state = SENT_DISCONNECT; 3541 3542 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3543 3544 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3545 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3546 3547 // ... which would be ignored anyway as we shutdown (free) the connection now 3548 hci_shutdown_connection(connection); 3549 3550 // finally, send the disconnect command 3551 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3552 return; 3553 } 3554 log_info("HCI_STATE_HALTING, calling off"); 3555 3556 // switch mode 3557 hci_power_control_off(); 3558 3559 log_info("HCI_STATE_HALTING, emitting state"); 3560 hci_emit_state(); 3561 log_info("HCI_STATE_HALTING, done"); 3562 break; 3563 3564 case HCI_STATE_FALLING_ASLEEP: 3565 switch(hci_stack->substate) { 3566 case HCI_FALLING_ASLEEP_DISCONNECT: 3567 log_info("HCI_STATE_FALLING_ASLEEP"); 3568 // close all open connections 3569 connection = (hci_connection_t *) hci_stack->connections; 3570 3571 #ifdef HAVE_PLATFORM_IPHONE_OS 3572 // don't close connections, if H4 supports power management 3573 if (btstack_control_iphone_power_management_enabled()){ 3574 connection = NULL; 3575 } 3576 #endif 3577 if (connection){ 3578 3579 // send disconnect 3580 if (!hci_can_send_command_packet_now()) return; 3581 3582 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3583 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3584 3585 // send disconnected event right away - causes higher layer connections to get closed, too. 3586 hci_shutdown_connection(connection); 3587 return; 3588 } 3589 3590 if (hci_classic_supported()){ 3591 // disable page and inquiry scan 3592 if (!hci_can_send_command_packet_now()) return; 3593 3594 log_info("HCI_STATE_HALTING, disabling inq scans"); 3595 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3596 3597 // continue in next sub state 3598 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3599 break; 3600 } 3601 // no break - fall through for ble-only chips 3602 3603 case HCI_FALLING_ASLEEP_COMPLETE: 3604 log_info("HCI_STATE_HALTING, calling sleep"); 3605 #ifdef HAVE_PLATFORM_IPHONE_OS 3606 // don't actually go to sleep, if H4 supports power management 3607 if (btstack_control_iphone_power_management_enabled()){ 3608 // SLEEP MODE reached 3609 hci_stack->state = HCI_STATE_SLEEPING; 3610 hci_emit_state(); 3611 break; 3612 } 3613 #endif 3614 // switch mode 3615 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3616 hci_emit_state(); 3617 break; 3618 3619 default: 3620 break; 3621 } 3622 break; 3623 3624 default: 3625 break; 3626 } 3627 } 3628 3629 int hci_send_cmd_packet(uint8_t *packet, int size){ 3630 // house-keeping 3631 3632 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3633 hci_stack->loopback_mode = packet[3]; 3634 } 3635 3636 #ifdef ENABLE_CLASSIC 3637 bd_addr_t addr; 3638 hci_connection_t * conn; 3639 3640 // create_connection? 3641 if (IS_COMMAND(packet, hci_create_connection)){ 3642 reverse_bd_addr(&packet[3], addr); 3643 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3644 3645 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3646 if (!conn){ 3647 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3648 if (!conn){ 3649 // notify client that alloc failed 3650 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3651 return -1; // packet not sent to controller 3652 } 3653 conn->state = SEND_CREATE_CONNECTION; 3654 } 3655 log_info("conn state %u", conn->state); 3656 switch (conn->state){ 3657 // if connection active exists 3658 case OPEN: 3659 // and OPEN, emit connection complete command 3660 hci_emit_connection_complete(addr, conn->con_handle, 0); 3661 return -1; // packet not sent to controller 3662 case SEND_CREATE_CONNECTION: 3663 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 3664 break; 3665 default: 3666 // otherwise, just ignore as it is already in the open process 3667 return -1; // packet not sent to controller 3668 } 3669 conn->state = SENT_CREATE_CONNECTION; 3670 3671 // track outgoing connection 3672 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_CLASSIC; 3673 memcpy(hci_stack->outgoing_addr, addr, 6); 3674 } 3675 3676 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3677 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3678 } 3679 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3680 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3681 } 3682 3683 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3684 if (hci_stack->link_key_db){ 3685 reverse_bd_addr(&packet[3], addr); 3686 hci_stack->link_key_db->delete_link_key(addr); 3687 } 3688 } 3689 3690 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3691 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3692 reverse_bd_addr(&packet[3], addr); 3693 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3694 if (conn){ 3695 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3696 } 3697 } 3698 3699 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3700 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3701 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3702 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3703 reverse_bd_addr(&packet[3], addr); 3704 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3705 if (conn){ 3706 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3707 } 3708 } 3709 3710 #ifdef ENABLE_SCO_OVER_HCI 3711 // setup_synchronous_connection? Voice setting at offset 22 3712 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3713 // TODO: compare to current setting if sco connection already active 3714 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3715 } 3716 // accept_synchronus_connection? Voice setting at offset 18 3717 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3718 // TODO: compare to current setting if sco connection already active 3719 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3720 } 3721 #endif 3722 #endif 3723 3724 #ifdef ENABLE_BLE 3725 #ifdef ENABLE_LE_PERIPHERAL 3726 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3727 hci_stack->le_random_address_set = 1; 3728 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3729 } 3730 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3731 hci_stack->le_advertisements_active = packet[3]; 3732 } 3733 #endif 3734 #ifdef ENABLE_LE_CENTRAL 3735 if (IS_COMMAND(packet, hci_le_create_connection)){ 3736 // white list used? 3737 uint8_t initiator_filter_policy = packet[7]; 3738 switch (initiator_filter_policy){ 3739 case 0: 3740 // whitelist not used 3741 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3742 break; 3743 case 1: 3744 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3745 break; 3746 default: 3747 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3748 break; 3749 } 3750 } 3751 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3752 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3753 } 3754 #endif 3755 #endif 3756 3757 hci_stack->num_cmd_packets--; 3758 3759 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3760 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3761 } 3762 3763 // disconnect because of security block 3764 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3765 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3766 if (!connection) return; 3767 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3768 } 3769 3770 3771 // Configure Secure Simple Pairing 3772 3773 #ifdef ENABLE_CLASSIC 3774 3775 // enable will enable SSP during init 3776 void gap_ssp_set_enable(int enable){ 3777 hci_stack->ssp_enable = enable; 3778 } 3779 3780 static int hci_local_ssp_activated(void){ 3781 return gap_ssp_supported() && hci_stack->ssp_enable; 3782 } 3783 3784 // if set, BTstack will respond to io capability request using authentication requirement 3785 void gap_ssp_set_io_capability(int io_capability){ 3786 hci_stack->ssp_io_capability = io_capability; 3787 } 3788 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3789 hci_stack->ssp_authentication_requirement = authentication_requirement; 3790 } 3791 3792 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3793 void gap_ssp_set_auto_accept(int auto_accept){ 3794 hci_stack->ssp_auto_accept = auto_accept; 3795 } 3796 #endif 3797 3798 // va_list part of hci_send_cmd 3799 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3800 if (!hci_can_send_command_packet_now()){ 3801 log_error("hci_send_cmd called but cannot send packet now"); 3802 return 0; 3803 } 3804 3805 // for HCI INITIALIZATION 3806 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3807 hci_stack->last_cmd_opcode = cmd->opcode; 3808 3809 hci_reserve_packet_buffer(); 3810 uint8_t * packet = hci_stack->hci_packet_buffer; 3811 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3812 int err = hci_send_cmd_packet(packet, size); 3813 3814 // release packet buffer for synchronous transport implementations 3815 if (hci_transport_synchronous()){ 3816 hci_release_packet_buffer(); 3817 hci_emit_transport_packet_sent(); 3818 } 3819 3820 return err; 3821 } 3822 3823 /** 3824 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3825 */ 3826 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3827 va_list argptr; 3828 va_start(argptr, cmd); 3829 int res = hci_send_cmd_va_arg(cmd, argptr); 3830 va_end(argptr); 3831 return res; 3832 } 3833 3834 // Create various non-HCI events. 3835 // TODO: generalize, use table similar to hci_create_command 3836 3837 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3838 // dump packet 3839 if (dump) { 3840 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3841 } 3842 3843 // dispatch to all event handlers 3844 btstack_linked_list_iterator_t it; 3845 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3846 while (btstack_linked_list_iterator_has_next(&it)){ 3847 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3848 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3849 } 3850 } 3851 3852 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3853 if (!hci_stack->acl_packet_handler) return; 3854 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3855 } 3856 3857 #ifdef ENABLE_CLASSIC 3858 static void hci_notify_if_sco_can_send_now(void){ 3859 // notify SCO sender if waiting 3860 if (!hci_stack->sco_waiting_for_can_send_now) return; 3861 if (hci_can_send_sco_packet_now()){ 3862 hci_stack->sco_waiting_for_can_send_now = 0; 3863 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3864 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3865 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3866 } 3867 } 3868 3869 // parsing end emitting has been merged to reduce code size 3870 static void gap_inquiry_explode(uint8_t * packet){ 3871 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 3872 3873 uint8_t * eir_data; 3874 ad_context_t context; 3875 const uint8_t * name; 3876 uint8_t name_len; 3877 3878 int event_type = hci_event_packet_get_type(packet); 3879 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3880 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 3881 3882 // event[1] is set at the end 3883 int i; 3884 for (i=0; i<num_responses;i++){ 3885 memset(event, 0, sizeof(event)); 3886 event[0] = GAP_EVENT_INQUIRY_RESULT; 3887 uint8_t event_size = 18; // if name is not set by EIR 3888 3889 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 3890 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 3891 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 3892 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 3893 3894 switch (event_type){ 3895 case HCI_EVENT_INQUIRY_RESULT: 3896 // 14,15,16,17 = 0, size 18 3897 break; 3898 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3899 event[14] = 1; 3900 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3901 // 16,17 = 0, size 18 3902 break; 3903 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3904 event[14] = 1; 3905 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 3906 // for EIR packets, there is only one reponse in it 3907 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 3908 name = NULL; 3909 // EIR data is 240 bytes in EIR event 3910 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 3911 uint8_t data_type = ad_iterator_get_data_type(&context); 3912 uint8_t data_size = ad_iterator_get_data_len(&context); 3913 const uint8_t * data = ad_iterator_get_data(&context); 3914 // Prefer Complete Local Name over Shortend Local Name 3915 switch (data_type){ 3916 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 3917 if (name) continue; 3918 /* explicit fall-through */ 3919 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 3920 name = data; 3921 name_len = data_size; 3922 break; 3923 default: 3924 break; 3925 } 3926 } 3927 if (name){ 3928 event[16] = 1; 3929 // truncate name if needed 3930 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 3931 event[17] = len; 3932 memcpy(&event[18], name, len); 3933 event_size += len; 3934 } 3935 break; 3936 } 3937 event[1] = event_size - 2; 3938 hci_emit_event(event, event_size, 1); 3939 } 3940 } 3941 #endif 3942 3943 void hci_emit_state(void){ 3944 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3945 uint8_t event[3]; 3946 event[0] = BTSTACK_EVENT_STATE; 3947 event[1] = sizeof(event) - 2; 3948 event[2] = hci_stack->state; 3949 hci_emit_event(event, sizeof(event), 1); 3950 } 3951 3952 #ifdef ENABLE_CLASSIC 3953 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3954 uint8_t event[13]; 3955 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3956 event[1] = sizeof(event) - 2; 3957 event[2] = status; 3958 little_endian_store_16(event, 3, con_handle); 3959 reverse_bd_addr(address, &event[5]); 3960 event[11] = 1; // ACL connection 3961 event[12] = 0; // encryption disabled 3962 hci_emit_event(event, sizeof(event), 1); 3963 } 3964 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3965 if (disable_l2cap_timeouts) return; 3966 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3967 uint8_t event[4]; 3968 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3969 event[1] = sizeof(event) - 2; 3970 little_endian_store_16(event, 2, conn->con_handle); 3971 hci_emit_event(event, sizeof(event), 1); 3972 } 3973 #endif 3974 3975 #ifdef ENABLE_BLE 3976 #ifdef ENABLE_LE_CENTRAL 3977 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3978 uint8_t event[21]; 3979 event[0] = HCI_EVENT_LE_META; 3980 event[1] = sizeof(event) - 2; 3981 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3982 event[3] = status; 3983 little_endian_store_16(event, 4, con_handle); 3984 event[6] = 0; // TODO: role 3985 event[7] = address_type; 3986 reverse_bd_addr(address, &event[8]); 3987 little_endian_store_16(event, 14, 0); // interval 3988 little_endian_store_16(event, 16, 0); // latency 3989 little_endian_store_16(event, 18, 0); // supervision timeout 3990 event[20] = 0; // master clock accuracy 3991 hci_emit_event(event, sizeof(event), 1); 3992 } 3993 #endif 3994 #endif 3995 3996 static void hci_emit_transport_packet_sent(void){ 3997 // notify upper stack that it might be possible to send again 3998 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 3999 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4000 } 4001 4002 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4003 uint8_t event[6]; 4004 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4005 event[1] = sizeof(event) - 2; 4006 event[2] = 0; // status = OK 4007 little_endian_store_16(event, 3, con_handle); 4008 event[5] = reason; 4009 hci_emit_event(event, sizeof(event), 1); 4010 } 4011 4012 static void hci_emit_nr_connections_changed(void){ 4013 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4014 uint8_t event[3]; 4015 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4016 event[1] = sizeof(event) - 2; 4017 event[2] = nr_hci_connections(); 4018 hci_emit_event(event, sizeof(event), 1); 4019 } 4020 4021 static void hci_emit_hci_open_failed(void){ 4022 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4023 uint8_t event[2]; 4024 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4025 event[1] = sizeof(event) - 2; 4026 hci_emit_event(event, sizeof(event), 1); 4027 } 4028 4029 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4030 log_info("hci_emit_dedicated_bonding_result %u ", status); 4031 uint8_t event[9]; 4032 int pos = 0; 4033 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4034 event[pos++] = sizeof(event) - 2; 4035 event[pos++] = status; 4036 reverse_bd_addr(address, &event[pos]); 4037 hci_emit_event(event, sizeof(event), 1); 4038 } 4039 4040 4041 #ifdef ENABLE_CLASSIC 4042 4043 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4044 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4045 uint8_t event[5]; 4046 int pos = 0; 4047 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4048 event[pos++] = sizeof(event) - 2; 4049 little_endian_store_16(event, 2, con_handle); 4050 pos += 2; 4051 event[pos++] = level; 4052 hci_emit_event(event, sizeof(event), 1); 4053 } 4054 4055 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4056 if (!connection) return LEVEL_0; 4057 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4058 return gap_security_level_for_link_key_type(connection->link_key_type); 4059 } 4060 4061 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4062 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4063 uint8_t event[3]; 4064 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4065 event[1] = sizeof(event) - 2; 4066 event[2] = enabled; 4067 hci_emit_event(event, sizeof(event), 1); 4068 } 4069 4070 #ifdef ENABLE_CLASSIC 4071 // query if remote side supports eSCO 4072 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4073 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4074 if (!connection) return 0; 4075 return connection->remote_supported_feature_eSCO; 4076 } 4077 4078 // query if remote side supports SSP 4079 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4080 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4081 if (!connection) return 0; 4082 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4083 } 4084 4085 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4086 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4087 } 4088 #endif 4089 4090 // GAP API 4091 /** 4092 * @bbrief enable/disable bonding. default is enabled 4093 * @praram enabled 4094 */ 4095 void gap_set_bondable_mode(int enable){ 4096 hci_stack->bondable = enable ? 1 : 0; 4097 } 4098 /** 4099 * @brief Get bondable mode. 4100 * @return 1 if bondable 4101 */ 4102 int gap_get_bondable_mode(void){ 4103 return hci_stack->bondable; 4104 } 4105 4106 /** 4107 * @brief map link keys to security levels 4108 */ 4109 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4110 switch (link_key_type){ 4111 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4112 return LEVEL_4; 4113 case COMBINATION_KEY: 4114 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4115 return LEVEL_3; 4116 default: 4117 return LEVEL_2; 4118 } 4119 } 4120 4121 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4122 log_info("gap_mitm_protection_required_for_security_level %u", level); 4123 return level > LEVEL_2; 4124 } 4125 4126 /** 4127 * @brief get current security level 4128 */ 4129 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4130 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4131 if (!connection) return LEVEL_0; 4132 return gap_security_level_for_connection(connection); 4133 } 4134 4135 /** 4136 * @brief request connection to device to 4137 * @result GAP_AUTHENTICATION_RESULT 4138 */ 4139 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4140 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4141 if (!connection){ 4142 hci_emit_security_level(con_handle, LEVEL_0); 4143 return; 4144 } 4145 gap_security_level_t current_level = gap_security_level(con_handle); 4146 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4147 requested_level, connection->requested_security_level, current_level); 4148 4149 // assumption: earlier requested security higher than current level => security request is active 4150 if (current_level < connection->requested_security_level){ 4151 if (connection->requested_security_level < requested_level){ 4152 // increase requested level as new level is higher 4153 4154 // TODO: handle re-authentication when done 4155 4156 connection->requested_security_level = requested_level; 4157 } 4158 return; 4159 } 4160 4161 // no request active, notify if security sufficient 4162 if (requested_level <= current_level){ 4163 hci_emit_security_level(con_handle, current_level); 4164 return; 4165 } 4166 4167 // start pairing to increase security level 4168 connection->requested_security_level = requested_level; 4169 4170 #if 0 4171 // sending encryption request without a link key results in an error. 4172 // TODO: figure out how to use it properly 4173 4174 // would enabling ecnryption suffice (>= LEVEL_2)? 4175 if (hci_stack->link_key_db){ 4176 link_key_type_t link_key_type; 4177 link_key_t link_key; 4178 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4179 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4180 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4181 return; 4182 } 4183 } 4184 } 4185 #endif 4186 4187 // start to authenticate connection 4188 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4189 hci_run(); 4190 } 4191 4192 /** 4193 * @brief start dedicated bonding with device. disconnect after bonding 4194 * @param device 4195 * @param request MITM protection 4196 * @result GAP_DEDICATED_BONDING_COMPLETE 4197 */ 4198 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4199 4200 // create connection state machine 4201 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 4202 4203 if (!connection){ 4204 return BTSTACK_MEMORY_ALLOC_FAILED; 4205 } 4206 4207 // delete linkn key 4208 gap_drop_link_key_for_bd_addr(device); 4209 4210 // configure LEVEL_2/3, dedicated bonding 4211 connection->state = SEND_CREATE_CONNECTION; 4212 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4213 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4214 connection->bonding_flags = BONDING_DEDICATED; 4215 4216 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4217 4218 // handle: connnection failure (connection complete != ok) 4219 // handle: authentication failure 4220 // handle: disconnect on done 4221 4222 hci_run(); 4223 4224 return 0; 4225 } 4226 #endif 4227 4228 void gap_set_local_name(const char * local_name){ 4229 hci_stack->local_name = local_name; 4230 } 4231 4232 4233 #ifdef ENABLE_BLE 4234 4235 #ifdef ENABLE_LE_CENTRAL 4236 void gap_start_scan(void){ 4237 hci_stack->le_scanning_enabled = 1; 4238 hci_run(); 4239 } 4240 4241 void gap_stop_scan(void){ 4242 hci_stack->le_scanning_enabled = 0; 4243 hci_run(); 4244 } 4245 4246 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4247 hci_stack->le_scan_type = scan_type; 4248 hci_stack->le_scan_interval = scan_interval; 4249 hci_stack->le_scan_window = scan_window; 4250 hci_run(); 4251 } 4252 4253 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4254 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4255 if (!conn){ 4256 log_info("gap_connect: no connection exists yet, creating context"); 4257 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4258 if (!conn){ 4259 // notify client that alloc failed 4260 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4261 log_info("gap_connect: failed to alloc hci_connection_t"); 4262 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4263 } 4264 conn->state = SEND_CREATE_CONNECTION; 4265 log_info("gap_connect: send create connection next"); 4266 hci_run(); 4267 return 0; 4268 } 4269 4270 if (!hci_is_le_connection(conn) || 4271 conn->state == SEND_CREATE_CONNECTION || 4272 conn->state == SENT_CREATE_CONNECTION) { 4273 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4274 log_error("gap_connect: classic connection or connect is already being created"); 4275 return GATT_CLIENT_IN_WRONG_STATE; 4276 } 4277 4278 log_info("gap_connect: context exists with state %u", conn->state); 4279 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4280 hci_run(); 4281 return 0; 4282 } 4283 4284 // @assumption: only a single outgoing LE Connection exists 4285 static hci_connection_t * gap_get_outgoing_connection(void){ 4286 btstack_linked_item_t *it; 4287 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4288 hci_connection_t * conn = (hci_connection_t *) it; 4289 if (!hci_is_le_connection(conn)) continue; 4290 switch (conn->state){ 4291 case SEND_CREATE_CONNECTION: 4292 case SENT_CREATE_CONNECTION: 4293 case SENT_CANCEL_CONNECTION: 4294 return conn; 4295 default: 4296 break; 4297 }; 4298 } 4299 return NULL; 4300 } 4301 4302 uint8_t gap_connect_cancel(void){ 4303 hci_connection_t * conn = gap_get_outgoing_connection(); 4304 if (!conn) return 0; 4305 switch (conn->state){ 4306 case SEND_CREATE_CONNECTION: 4307 // skip sending create connection and emit event instead 4308 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4309 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4310 btstack_memory_hci_connection_free( conn ); 4311 break; 4312 case SENT_CREATE_CONNECTION: 4313 // request to send cancel connection 4314 conn->state = SEND_CANCEL_CONNECTION; 4315 hci_run(); 4316 break; 4317 default: 4318 break; 4319 } 4320 return 0; 4321 } 4322 #endif 4323 4324 #ifdef ENABLE_LE_CENTRAL 4325 /** 4326 * @brief Set connection parameters for outgoing connections 4327 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4328 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4329 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4330 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4331 * @param conn_latency, default: 4 4332 * @param supervision_timeout (unit: 10ms), default: 720 ms 4333 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4334 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4335 */ 4336 4337 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4338 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4339 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4340 hci_stack->le_connection_scan_interval = conn_scan_interval; 4341 hci_stack->le_connection_scan_window = conn_scan_window; 4342 hci_stack->le_connection_interval_min = conn_interval_min; 4343 hci_stack->le_connection_interval_max = conn_interval_max; 4344 hci_stack->le_connection_latency = conn_latency; 4345 hci_stack->le_supervision_timeout = supervision_timeout; 4346 hci_stack->le_minimum_ce_length = min_ce_length; 4347 hci_stack->le_maximum_ce_length = max_ce_length; 4348 } 4349 #endif 4350 4351 /** 4352 * @brief Updates the connection parameters for a given LE connection 4353 * @param handle 4354 * @param conn_interval_min (unit: 1.25ms) 4355 * @param conn_interval_max (unit: 1.25ms) 4356 * @param conn_latency 4357 * @param supervision_timeout (unit: 10ms) 4358 * @returns 0 if ok 4359 */ 4360 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4361 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4362 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4363 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4364 connection->le_conn_interval_min = conn_interval_min; 4365 connection->le_conn_interval_max = conn_interval_max; 4366 connection->le_conn_latency = conn_latency; 4367 connection->le_supervision_timeout = supervision_timeout; 4368 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4369 hci_run(); 4370 return 0; 4371 } 4372 4373 /** 4374 * @brief Request an update of the connection parameter for a given LE connection 4375 * @param handle 4376 * @param conn_interval_min (unit: 1.25ms) 4377 * @param conn_interval_max (unit: 1.25ms) 4378 * @param conn_latency 4379 * @param supervision_timeout (unit: 10ms) 4380 * @returns 0 if ok 4381 */ 4382 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4383 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4384 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4385 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4386 connection->le_conn_interval_min = conn_interval_min; 4387 connection->le_conn_interval_max = conn_interval_max; 4388 connection->le_conn_latency = conn_latency; 4389 connection->le_supervision_timeout = supervision_timeout; 4390 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4391 hci_run(); 4392 return 0; 4393 } 4394 4395 #ifdef ENABLE_LE_PERIPHERAL 4396 4397 static void gap_advertisments_changed(void){ 4398 // disable advertisements before updating adv, scan data, or adv params 4399 if (hci_stack->le_advertisements_active){ 4400 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4401 } 4402 hci_run(); 4403 } 4404 4405 /** 4406 * @brief Set Advertisement Data 4407 * @param advertising_data_length 4408 * @param advertising_data (max 31 octets) 4409 * @note data is not copied, pointer has to stay valid 4410 */ 4411 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4412 hci_stack->le_advertisements_data_len = advertising_data_length; 4413 hci_stack->le_advertisements_data = advertising_data; 4414 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4415 gap_advertisments_changed(); 4416 } 4417 4418 /** 4419 * @brief Set Scan Response Data 4420 * @param advertising_data_length 4421 * @param advertising_data (max 31 octets) 4422 * @note data is not copied, pointer has to stay valid 4423 */ 4424 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4425 hci_stack->le_scan_response_data_len = scan_response_data_length; 4426 hci_stack->le_scan_response_data = scan_response_data; 4427 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4428 gap_advertisments_changed(); 4429 } 4430 4431 /** 4432 * @brief Set Advertisement Parameters 4433 * @param adv_int_min 4434 * @param adv_int_max 4435 * @param adv_type 4436 * @param direct_address_type 4437 * @param direct_address 4438 * @param channel_map 4439 * @param filter_policy 4440 * 4441 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4442 */ 4443 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4444 uint8_t direct_address_typ, bd_addr_t direct_address, 4445 uint8_t channel_map, uint8_t filter_policy) { 4446 4447 hci_stack->le_advertisements_interval_min = adv_int_min; 4448 hci_stack->le_advertisements_interval_max = adv_int_max; 4449 hci_stack->le_advertisements_type = adv_type; 4450 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4451 hci_stack->le_advertisements_channel_map = channel_map; 4452 hci_stack->le_advertisements_filter_policy = filter_policy; 4453 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4454 4455 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4456 gap_advertisments_changed(); 4457 } 4458 4459 /** 4460 * @brief Enable/Disable Advertisements 4461 * @param enabled 4462 */ 4463 void gap_advertisements_enable(int enabled){ 4464 hci_stack->le_advertisements_enabled = enabled; 4465 if (enabled && !hci_stack->le_advertisements_active){ 4466 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4467 } 4468 if (!enabled && hci_stack->le_advertisements_active){ 4469 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4470 } 4471 hci_run(); 4472 } 4473 4474 #endif 4475 4476 void hci_le_set_own_address_type(uint8_t own_address_type){ 4477 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4478 if (own_address_type == hci_stack->le_own_addr_type) return; 4479 hci_stack->le_own_addr_type = own_address_type; 4480 4481 #ifdef ENABLE_LE_PERIPHERAL 4482 // update advertisement parameters, too 4483 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4484 gap_advertisments_changed(); 4485 #endif 4486 #ifdef ENABLE_LE_CENTRAL 4487 // note: we don't update scan parameters or modify ongoing connection attempts 4488 #endif 4489 } 4490 4491 #endif 4492 4493 uint8_t gap_disconnect(hci_con_handle_t handle){ 4494 hci_connection_t * conn = hci_connection_for_handle(handle); 4495 if (!conn){ 4496 hci_emit_disconnection_complete(handle, 0); 4497 return 0; 4498 } 4499 // ignore if already disconnected 4500 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4501 return 0; 4502 } 4503 conn->state = SEND_DISCONNECT; 4504 hci_run(); 4505 return 0; 4506 } 4507 4508 /** 4509 * @brief Get connection type 4510 * @param con_handle 4511 * @result connection_type 4512 */ 4513 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4514 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4515 if (!conn) return GAP_CONNECTION_INVALID; 4516 switch (conn->address_type){ 4517 case BD_ADDR_TYPE_LE_PUBLIC: 4518 case BD_ADDR_TYPE_LE_RANDOM: 4519 return GAP_CONNECTION_LE; 4520 case BD_ADDR_TYPE_SCO: 4521 return GAP_CONNECTION_SCO; 4522 case BD_ADDR_TYPE_CLASSIC: 4523 return GAP_CONNECTION_ACL; 4524 default: 4525 return GAP_CONNECTION_INVALID; 4526 } 4527 } 4528 4529 #ifdef ENABLE_BLE 4530 4531 #ifdef ENABLE_LE_CENTRAL 4532 /** 4533 * @brief Auto Connection Establishment - Start Connecting to device 4534 * @param address_typ 4535 * @param address 4536 * @returns 0 if ok 4537 */ 4538 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4539 // check capacity 4540 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4541 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4542 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4543 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4544 entry->address_type = address_type; 4545 memcpy(entry->address, address, 6); 4546 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4547 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4548 hci_run(); 4549 return 0; 4550 } 4551 4552 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4553 btstack_linked_list_iterator_t it; 4554 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4555 while (btstack_linked_list_iterator_has_next(&it)){ 4556 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4557 if (entry->address_type != address_type) continue; 4558 if (memcmp(entry->address, address, 6) != 0) continue; 4559 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4560 // remove from controller if already present 4561 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4562 continue; 4563 } 4564 // direclty remove entry from whitelist 4565 btstack_linked_list_iterator_remove(&it); 4566 btstack_memory_whitelist_entry_free(entry); 4567 } 4568 } 4569 4570 /** 4571 * @brief Auto Connection Establishment - Stop Connecting to device 4572 * @param address_typ 4573 * @param address 4574 * @returns 0 if ok 4575 */ 4576 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4577 hci_remove_from_whitelist(address_type, address); 4578 hci_run(); 4579 return 0; 4580 } 4581 4582 /** 4583 * @brief Auto Connection Establishment - Stop everything 4584 * @note Convenience function to stop all active auto connection attempts 4585 */ 4586 void gap_auto_connection_stop_all(void){ 4587 btstack_linked_list_iterator_t it; 4588 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4589 while (btstack_linked_list_iterator_has_next(&it)){ 4590 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4591 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4592 // remove from controller if already present 4593 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4594 continue; 4595 } 4596 // directly remove entry from whitelist 4597 btstack_linked_list_iterator_remove(&it); 4598 btstack_memory_whitelist_entry_free(entry); 4599 } 4600 hci_run(); 4601 } 4602 #endif 4603 #endif 4604 4605 #ifdef ENABLE_CLASSIC 4606 /** 4607 * @brief Set Extended Inquiry Response data 4608 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4609 * @note has to be done before stack starts up 4610 */ 4611 void gap_set_extended_inquiry_response(const uint8_t * data){ 4612 hci_stack->eir_data = data; 4613 } 4614 4615 /** 4616 * @brief Start GAP Classic Inquiry 4617 * @param duration in 1.28s units 4618 * @return 0 if ok 4619 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4620 */ 4621 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4622 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 4623 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4624 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4625 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4626 } 4627 hci_stack->inquiry_state = duration_in_1280ms_units; 4628 hci_run(); 4629 return 0; 4630 } 4631 4632 /** 4633 * @brief Stop GAP Classic Inquiry 4634 * @returns 0 if ok 4635 */ 4636 int gap_inquiry_stop(void){ 4637 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4638 // emit inquiry complete event, before it even started 4639 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4640 hci_emit_event(event, sizeof(event), 1); 4641 return 0; 4642 } 4643 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4644 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4645 hci_run(); 4646 return 0; 4647 } 4648 4649 4650 /** 4651 * @brief Remote Name Request 4652 * @param addr 4653 * @param page_scan_repetition_mode 4654 * @param clock_offset only used when bit 15 is set 4655 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4656 */ 4657 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4658 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4659 memcpy(hci_stack->remote_name_addr, addr, 6); 4660 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4661 hci_stack->remote_name_clock_offset = clock_offset; 4662 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4663 hci_run(); 4664 return 0; 4665 } 4666 4667 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4668 hci_stack->gap_pairing_state = state; 4669 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4670 hci_run(); 4671 return 0; 4672 } 4673 4674 /** 4675 * @brief Legacy Pairing Pin Code Response 4676 * @param addr 4677 * @param pin 4678 * @return 0 if ok 4679 */ 4680 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4681 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4682 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 4683 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4684 } 4685 4686 /** 4687 * @brief Abort Legacy Pairing 4688 * @param addr 4689 * @param pin 4690 * @return 0 if ok 4691 */ 4692 int gap_pin_code_negative(bd_addr_t addr){ 4693 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4694 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4695 } 4696 4697 /** 4698 * @brief SSP Passkey Response 4699 * @param addr 4700 * @param passkey 4701 * @return 0 if ok 4702 */ 4703 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4704 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4705 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 4706 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4707 } 4708 4709 /** 4710 * @brief Abort SSP Passkey Entry/Pairing 4711 * @param addr 4712 * @param pin 4713 * @return 0 if ok 4714 */ 4715 int gap_ssp_passkey_negative(bd_addr_t addr){ 4716 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4717 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4718 } 4719 4720 /** 4721 * @brief Accept SSP Numeric Comparison 4722 * @param addr 4723 * @param passkey 4724 * @return 0 if ok 4725 */ 4726 int gap_ssp_confirmation_response(bd_addr_t addr){ 4727 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4728 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4729 } 4730 4731 /** 4732 * @brief Abort SSP Numeric Comparison/Pairing 4733 * @param addr 4734 * @param pin 4735 * @return 0 if ok 4736 */ 4737 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4738 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4739 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4740 } 4741 4742 /** 4743 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4744 * @param inquiry_mode see bluetooth_defines.h 4745 */ 4746 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4747 hci_stack->inquiry_mode = mode; 4748 } 4749 4750 /** 4751 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4752 */ 4753 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4754 hci_stack->sco_voice_setting = voice_setting; 4755 } 4756 4757 /** 4758 * @brief Get SCO Voice Setting 4759 * @return current voice setting 4760 */ 4761 uint16_t hci_get_sco_voice_setting(void){ 4762 return hci_stack->sco_voice_setting; 4763 } 4764 4765 /** @brief Get SCO packet length for current SCO Voice setting 4766 * @note Using SCO packets of the exact length is required for USB transfer 4767 * @return Length of SCO packets in bytes (not audio frames) 4768 */ 4769 int hci_get_sco_packet_length(void){ 4770 int sco_packet_length = 0; 4771 4772 #ifdef ENABLE_CLASSIC 4773 #ifdef ENABLE_SCO_OVER_HCI 4774 // see Core Spec for H2 USB Transfer. 4775 4776 // CVSD requires twice as much bytes 4777 int multiplier = hci_stack->sco_voice_setting & 0x0020 ? 2 : 1; 4778 4779 // 3 byte SCO header + 24 bytes per connection 4780 sco_packet_length = 3 + 24 * hci_number_sco_connections() * multiplier; 4781 #endif 4782 #endif 4783 return sco_packet_length; 4784 } 4785 4786 /** 4787 * @brief Sets the master/slave policy 4788 * @param policy (0: attempt to become master, 1: let connecting device decide) 4789 */ 4790 void hci_set_master_slave_policy(uint8_t policy){ 4791 hci_stack->master_slave_policy = policy; 4792 } 4793 4794 #endif 4795 4796 HCI_STATE hci_get_state(void){ 4797 return hci_stack->state; 4798 } 4799 4800 4801 /** 4802 * @brief Set callback for Bluetooth Hardware Error 4803 */ 4804 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4805 hci_stack->hardware_error_callback = fn; 4806 } 4807 4808 void hci_disconnect_all(void){ 4809 btstack_linked_list_iterator_t it; 4810 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4811 while (btstack_linked_list_iterator_has_next(&it)){ 4812 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4813 if (con->state == SENT_DISCONNECT) continue; 4814 con->state = SEND_DISCONNECT; 4815 } 4816 hci_run(); 4817 } 4818 4819 uint16_t hci_get_manufacturer(void){ 4820 return hci_stack->manufacturer; 4821 } 4822 4823 #ifdef ENABLE_BLE 4824 4825 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 4826 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 4827 if (!hci_con) return NULL; 4828 return &hci_con->sm_connection; 4829 } 4830 4831 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 4832 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 4833 4834 int gap_encryption_key_size(hci_con_handle_t con_handle){ 4835 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4836 if (!sm_conn) return 0; // wrong connection 4837 if (!sm_conn->sm_connection_encrypted) return 0; 4838 return sm_conn->sm_actual_encryption_key_size; 4839 } 4840 4841 int gap_authenticated(hci_con_handle_t con_handle){ 4842 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4843 if (!sm_conn) return 0; // wrong connection 4844 if (!sm_conn->sm_connection_encrypted) return 0; // unencrypted connection cannot be authenticated 4845 return sm_conn->sm_connection_authenticated; 4846 } 4847 4848 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 4849 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4850 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 4851 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 4852 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 4853 return sm_conn->sm_connection_authorization_state; 4854 } 4855 #endif 4856 4857 #ifdef ENABLE_CLASSIC 4858 uint8_t gap_sniff_mode_enter(hci_con_handle_t con_handle, uint16_t sniff_min_interval, uint16_t sniff_max_interval, uint16_t sniff_attempt, uint16_t sniff_timeout){ 4859 hci_connection_t * conn = hci_connection_for_handle(con_handle); 4860 if (!conn) return GAP_CONNECTION_INVALID; 4861 conn->sniff_min_interval = sniff_min_interval; 4862 conn->sniff_max_interval = sniff_max_interval; 4863 conn->sniff_attempt = sniff_attempt; 4864 conn->sniff_timeout = sniff_timeout; 4865 hci_run(); 4866 return 0; 4867 } 4868 4869 /** 4870 * @brief Exit Sniff mode 4871 * @param con_handle 4872 @ @return 0 if ok 4873 */ 4874 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 4875 hci_connection_t * conn = hci_connection_for_handle(con_handle); 4876 if (!conn) return GAP_CONNECTION_INVALID; 4877 conn->sniff_min_interval = 0xffff; 4878 hci_run(); 4879 return 0; 4880 } 4881 #endif 4882