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 bd_addr_copy(conn->address, addr); 190 conn->address_type = addr_type; 191 conn->con_handle = 0xffff; 192 conn->authentication_flags = AUTH_FLAGS_NONE; 193 conn->bonding_flags = 0; 194 conn->requested_security_level = LEVEL_0; 195 #ifdef ENABLE_CLASSIC 196 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 197 btstack_run_loop_set_timer_context(&conn->timeout, conn); 198 hci_connection_timestamp(conn); 199 conn->num_sco_bytes_sent = 0; 200 #endif 201 conn->acl_recombination_length = 0; 202 conn->acl_recombination_pos = 0; 203 conn->num_packets_sent = 0; 204 205 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 206 #ifdef ENABLE_BLE 207 conn->le_phy_update_all_phys = 0xff; 208 #endif 209 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 210 return conn; 211 } 212 213 214 /** 215 * get le connection parameter range 216 * 217 * @return le connection parameter range struct 218 */ 219 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 220 *range = hci_stack->le_connection_parameter_range; 221 } 222 223 /** 224 * set le connection parameter range 225 * 226 */ 227 228 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 229 hci_stack->le_connection_parameter_range = *range; 230 } 231 232 /** 233 * @brief Test if connection parameters are inside in existing rage 234 * @param conn_interval_min (unit: 1.25ms) 235 * @param conn_interval_max (unit: 1.25ms) 236 * @param conn_latency 237 * @param supervision_timeout (unit: 10ms) 238 * @returns 1 if included 239 */ 240 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){ 241 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 242 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 243 244 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 245 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 246 247 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 248 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 249 250 return 1; 251 } 252 253 /** 254 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 255 * @note: default: 1 256 * @param max_peripheral_connections 257 */ 258 #ifdef ENABLE_LE_PERIPHERAL 259 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 260 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 261 } 262 #endif 263 264 /** 265 * get hci connections iterator 266 * 267 * @return hci connections iterator 268 */ 269 270 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 271 btstack_linked_list_iterator_init(it, &hci_stack->connections); 272 } 273 274 /** 275 * get connection for a given handle 276 * 277 * @return connection OR NULL, if not found 278 */ 279 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 280 btstack_linked_list_iterator_t it; 281 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 282 while (btstack_linked_list_iterator_has_next(&it)){ 283 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 284 if ( item->con_handle == con_handle ) { 285 return item; 286 } 287 } 288 return NULL; 289 } 290 291 /** 292 * get connection for given address 293 * 294 * @return connection OR NULL, if not found 295 */ 296 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 297 btstack_linked_list_iterator_t it; 298 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 299 while (btstack_linked_list_iterator_has_next(&it)){ 300 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 301 if (connection->address_type != addr_type) continue; 302 if (memcmp(addr, connection->address, 6) != 0) continue; 303 return connection; 304 } 305 return NULL; 306 } 307 308 309 #ifdef ENABLE_CLASSIC 310 311 #ifdef ENABLE_SCO_OVER_HCI 312 static int hci_number_sco_connections(void){ 313 int connections = 0; 314 btstack_linked_list_iterator_t it; 315 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 316 while (btstack_linked_list_iterator_has_next(&it)){ 317 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 318 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 319 connections++; 320 } 321 return connections; 322 } 323 #endif 324 325 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 326 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 327 #ifdef HAVE_EMBEDDED_TICK 328 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 329 // connections might be timed out 330 hci_emit_l2cap_check_timeout(connection); 331 } 332 #else 333 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 334 // connections might be timed out 335 hci_emit_l2cap_check_timeout(connection); 336 } 337 #endif 338 } 339 340 static void hci_connection_timestamp(hci_connection_t *connection){ 341 #ifdef HAVE_EMBEDDED_TICK 342 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 343 #else 344 connection->timestamp = btstack_run_loop_get_time_ms(); 345 #endif 346 } 347 348 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 349 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 350 } 351 352 353 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 354 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 355 } 356 357 /** 358 * add authentication flags and reset timer 359 * @note: assumes classic connection 360 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 361 */ 362 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 363 bd_addr_t addr; 364 reverse_bd_addr(bd_addr, addr); 365 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 366 if (conn) { 367 connectionSetAuthenticationFlags(conn, flags); 368 hci_connection_timestamp(conn); 369 } 370 } 371 372 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 373 hci_connection_t * conn = hci_connection_for_handle(handle); 374 if (!conn) return 0; 375 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 376 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 377 return 0; 378 } 379 380 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 381 if (!hci_stack->link_key_db) return; 382 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 383 hci_stack->link_key_db->delete_link_key(addr); 384 } 385 386 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 387 if (!hci_stack->link_key_db) return; 388 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 389 hci_stack->link_key_db->put_link_key(addr, link_key, type); 390 } 391 392 void gap_delete_all_link_keys(void){ 393 bd_addr_t addr; 394 link_key_t link_key; 395 link_key_type_t type; 396 btstack_link_key_iterator_t it; 397 int ok = gap_link_key_iterator_init(&it); 398 if (!ok) { 399 log_error("could not initialize iterator"); 400 return; 401 } 402 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 403 gap_drop_link_key_for_bd_addr(addr); 404 } 405 gap_link_key_iterator_done(&it); 406 } 407 408 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 409 if (!hci_stack->link_key_db) return 0; 410 if (!hci_stack->link_key_db->iterator_init) return 0; 411 return hci_stack->link_key_db->iterator_init(it); 412 } 413 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){ 414 if (!hci_stack->link_key_db) return 0; 415 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 416 } 417 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 418 if (!hci_stack->link_key_db) return; 419 hci_stack->link_key_db->iterator_done(it); 420 } 421 #endif 422 423 static int hci_is_le_connection(hci_connection_t * connection){ 424 switch (connection->address_type){ 425 case BD_ADDR_TYPE_LE_PUBLIC: 426 case BD_ADDR_TYPE_LE_RANDOM: 427 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 428 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 429 return 1; 430 default: 431 return 0; 432 } 433 } 434 435 /** 436 * count connections 437 */ 438 static int nr_hci_connections(void){ 439 int count = 0; 440 btstack_linked_item_t *it; 441 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 442 return count; 443 } 444 445 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 446 447 unsigned int num_packets_sent_classic = 0; 448 unsigned int num_packets_sent_le = 0; 449 450 btstack_linked_item_t *it; 451 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 452 hci_connection_t * connection = (hci_connection_t *) it; 453 if (hci_is_le_connection(connection)){ 454 num_packets_sent_le += connection->num_packets_sent; 455 } 456 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 457 num_packets_sent_classic += connection->num_packets_sent; 458 } 459 } 460 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 461 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 462 int free_slots_le = 0; 463 464 if (free_slots_classic < 0){ 465 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); 466 return 0; 467 } 468 469 if (hci_stack->le_acl_packets_total_num){ 470 // if we have LE slots, they are used 471 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 472 if (free_slots_le < 0){ 473 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); 474 return 0; 475 } 476 } else { 477 // otherwise, classic slots are used for LE, too 478 free_slots_classic -= num_packets_sent_le; 479 if (free_slots_classic < 0){ 480 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); 481 return 0; 482 } 483 } 484 485 switch (address_type){ 486 case BD_ADDR_TYPE_UNKNOWN: 487 log_error("hci_number_free_acl_slots: unknown address type"); 488 return 0; 489 490 case BD_ADDR_TYPE_CLASSIC: 491 return free_slots_classic; 492 493 default: 494 if (hci_stack->le_acl_packets_total_num){ 495 return free_slots_le; 496 } 497 return free_slots_classic; 498 } 499 } 500 501 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 502 // get connection type 503 hci_connection_t * connection = hci_connection_for_handle(con_handle); 504 if (!connection){ 505 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 506 return 0; 507 } 508 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 509 } 510 511 #ifdef ENABLE_CLASSIC 512 static int hci_number_free_sco_slots(void){ 513 unsigned int num_sco_packets_sent = 0; 514 btstack_linked_item_t *it; 515 if (hci_stack->synchronous_flow_control_enabled){ 516 // explicit flow control 517 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 518 hci_connection_t * connection = (hci_connection_t *) it; 519 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 520 num_sco_packets_sent += connection->num_packets_sent; 521 } 522 } else { 523 // implicit flow control 524 uint16_t num_sco_bytes_sent = 0; 525 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 526 hci_connection_t * connection = (hci_connection_t *) it; 527 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 528 num_sco_bytes_sent += connection->num_sco_bytes_sent; 529 } 530 // deduce used slots from num sco bytes (plus 2 extra to be on the safe side) 531 unsigned int sco_payload_len = hci_get_sco_packet_length() - 3; 532 num_sco_packets_sent = (num_sco_bytes_sent / sco_payload_len) + 2; 533 log_info("hci_number_free_sco_slots: bytes sent %u -> packets sent %u", num_sco_bytes_sent, num_sco_packets_sent); 534 } 535 536 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 537 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 538 return 0; 539 } 540 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 541 } 542 #endif 543 544 // only used to send HCI Host Number Completed Packets 545 static int hci_can_send_comand_packet_transport(void){ 546 if (hci_stack->hci_packet_buffer_reserved) return 0; 547 548 // check for async hci transport implementations 549 if (hci_stack->hci_transport->can_send_packet_now){ 550 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 551 return 0; 552 } 553 } 554 return 1; 555 } 556 557 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 558 int hci_can_send_command_packet_now(void){ 559 if (hci_can_send_comand_packet_transport() == 0) return 0; 560 return hci_stack->num_cmd_packets > 0; 561 } 562 563 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 564 // check for async hci transport implementations 565 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 566 return hci_stack->hci_transport->can_send_packet_now(packet_type); 567 } 568 569 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 570 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 571 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 572 } 573 574 int hci_can_send_acl_le_packet_now(void){ 575 if (hci_stack->hci_packet_buffer_reserved) return 0; 576 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 577 } 578 579 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 580 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 581 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 582 } 583 584 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 585 if (hci_stack->hci_packet_buffer_reserved) return 0; 586 return hci_can_send_prepared_acl_packet_now(con_handle); 587 } 588 589 #ifdef ENABLE_CLASSIC 590 int hci_can_send_acl_classic_packet_now(void){ 591 if (hci_stack->hci_packet_buffer_reserved) return 0; 592 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 593 } 594 595 int hci_can_send_prepared_sco_packet_now(void){ 596 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 597 return hci_number_free_sco_slots() > 0; 598 } 599 600 int hci_can_send_sco_packet_now(void){ 601 if (hci_stack->hci_packet_buffer_reserved) return 0; 602 return hci_can_send_prepared_sco_packet_now(); 603 } 604 605 void hci_request_sco_can_send_now_event(void){ 606 hci_stack->sco_waiting_for_can_send_now = 1; 607 hci_notify_if_sco_can_send_now(); 608 } 609 #endif 610 611 // used for internal checks in l2cap.c 612 int hci_is_packet_buffer_reserved(void){ 613 return hci_stack->hci_packet_buffer_reserved; 614 } 615 616 // reserves outgoing packet buffer. @returns 1 if successful 617 int hci_reserve_packet_buffer(void){ 618 if (hci_stack->hci_packet_buffer_reserved) { 619 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 620 return 0; 621 } 622 hci_stack->hci_packet_buffer_reserved = 1; 623 return 1; 624 } 625 626 void hci_release_packet_buffer(void){ 627 hci_stack->hci_packet_buffer_reserved = 0; 628 } 629 630 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 631 static int hci_transport_synchronous(void){ 632 return hci_stack->hci_transport->can_send_packet_now == NULL; 633 } 634 635 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 636 637 // 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); 638 639 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 640 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 641 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 642 max_acl_data_packet_length = hci_stack->le_data_packets_length; 643 } 644 645 // testing: reduce buffer to minimum 646 // max_acl_data_packet_length = 52; 647 648 log_debug("hci_send_acl_packet_fragments entered"); 649 650 int err; 651 // multiple packets could be send on a synchronous HCI transport 652 while (1){ 653 654 log_debug("hci_send_acl_packet_fragments loop entered"); 655 656 // get current data 657 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 658 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 659 int more_fragments = 0; 660 661 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 662 if (current_acl_data_packet_length > max_acl_data_packet_length){ 663 more_fragments = 1; 664 current_acl_data_packet_length = max_acl_data_packet_length; 665 } 666 667 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 668 if (acl_header_pos > 0){ 669 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 670 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 671 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 672 } 673 674 // update header len 675 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 676 677 // count packet 678 connection->num_packets_sent++; 679 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 680 681 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 682 if (more_fragments){ 683 // update start of next fragment to send 684 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 685 } else { 686 // done 687 hci_stack->acl_fragmentation_pos = 0; 688 hci_stack->acl_fragmentation_total_size = 0; 689 } 690 691 // send packet 692 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 693 const int size = current_acl_data_packet_length + 4; 694 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 695 hci_stack->acl_fragmentation_tx_active = 1; 696 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 697 698 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 699 700 // done yet? 701 if (!more_fragments) break; 702 703 // can send more? 704 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 705 } 706 707 log_debug("hci_send_acl_packet_fragments loop over"); 708 709 // release buffer now for synchronous transport 710 if (hci_transport_synchronous()){ 711 hci_stack->acl_fragmentation_tx_active = 0; 712 hci_release_packet_buffer(); 713 hci_emit_transport_packet_sent(); 714 } 715 716 return err; 717 } 718 719 // pre: caller has reserved the packet buffer 720 int hci_send_acl_packet_buffer(int size){ 721 722 // log_info("hci_send_acl_packet_buffer size %u", size); 723 724 if (!hci_stack->hci_packet_buffer_reserved) { 725 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 726 return 0; 727 } 728 729 uint8_t * packet = hci_stack->hci_packet_buffer; 730 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 731 732 // check for free places on Bluetooth module 733 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 734 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 735 hci_release_packet_buffer(); 736 hci_emit_transport_packet_sent(); 737 return BTSTACK_ACL_BUFFERS_FULL; 738 } 739 740 hci_connection_t *connection = hci_connection_for_handle( con_handle); 741 if (!connection) { 742 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 743 hci_release_packet_buffer(); 744 hci_emit_transport_packet_sent(); 745 return 0; 746 } 747 748 #ifdef ENABLE_CLASSIC 749 hci_connection_timestamp(connection); 750 #endif 751 752 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 753 754 // setup data 755 hci_stack->acl_fragmentation_total_size = size; 756 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 757 758 return hci_send_acl_packet_fragments(connection); 759 } 760 761 #ifdef ENABLE_CLASSIC 762 // pre: caller has reserved the packet buffer 763 int hci_send_sco_packet_buffer(int size){ 764 765 // log_info("hci_send_acl_packet_buffer size %u", size); 766 767 if (!hci_stack->hci_packet_buffer_reserved) { 768 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 769 return 0; 770 } 771 772 uint8_t * packet = hci_stack->hci_packet_buffer; 773 774 // skip checks in loopback mode 775 if (!hci_stack->loopback_mode){ 776 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 777 778 // check for free places on Bluetooth module 779 if (!hci_can_send_prepared_sco_packet_now()) { 780 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 781 hci_release_packet_buffer(); 782 hci_emit_transport_packet_sent(); 783 return BTSTACK_ACL_BUFFERS_FULL; 784 } 785 786 // track send packet in connection struct 787 hci_connection_t *connection = hci_connection_for_handle( con_handle); 788 if (!connection) { 789 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 790 hci_release_packet_buffer(); 791 hci_emit_transport_packet_sent(); 792 return 0; 793 } 794 if (hci_stack->synchronous_flow_control_enabled){ 795 connection->num_packets_sent++; 796 } else { 797 uint16_t sco_payload_len = size - 3; 798 connection->num_sco_bytes_sent += sco_payload_len; 799 } 800 } 801 802 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 803 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 804 805 if (hci_transport_synchronous()){ 806 hci_release_packet_buffer(); 807 hci_emit_transport_packet_sent(); 808 } 809 810 return err; 811 } 812 #endif 813 814 static void acl_handler(uint8_t *packet, int size){ 815 816 // log_info("acl_handler: size %u", size); 817 818 // get info 819 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 820 hci_connection_t *conn = hci_connection_for_handle(con_handle); 821 uint8_t acl_flags = READ_ACL_FLAGS(packet); 822 uint16_t acl_length = READ_ACL_LENGTH(packet); 823 824 // ignore non-registered handle 825 if (!conn){ 826 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 827 return; 828 } 829 830 // assert packet is complete 831 if (acl_length + 4 != size){ 832 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 833 return; 834 } 835 836 #ifdef ENABLE_CLASSIC 837 // update idle timestamp 838 hci_connection_timestamp(conn); 839 #endif 840 841 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 842 hci_stack->host_completed_packets = 1; 843 conn->num_packets_completed++; 844 #endif 845 846 // handle different packet types 847 switch (acl_flags & 0x03) { 848 849 case 0x01: // continuation fragment 850 851 // sanity checks 852 if (conn->acl_recombination_pos == 0) { 853 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 854 return; 855 } 856 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 857 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 858 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 859 conn->acl_recombination_pos = 0; 860 return; 861 } 862 863 // append fragment payload (header already stored) 864 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 865 conn->acl_recombination_pos += acl_length; 866 867 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 868 // conn->acl_recombination_pos, conn->acl_recombination_length); 869 870 // forward complete L2CAP packet if complete. 871 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 872 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 873 // reset recombination buffer 874 conn->acl_recombination_length = 0; 875 conn->acl_recombination_pos = 0; 876 } 877 break; 878 879 case 0x02: { // first fragment 880 881 // sanity check 882 if (conn->acl_recombination_pos) { 883 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 884 conn->acl_recombination_pos = 0; 885 } 886 887 // peek into L2CAP packet! 888 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 889 890 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 891 892 // compare fragment size to L2CAP packet size 893 if (acl_length >= l2cap_length + 4){ 894 // forward fragment as L2CAP packet 895 hci_emit_acl_packet(packet, acl_length + 4); 896 } else { 897 898 if (acl_length > HCI_ACL_BUFFER_SIZE){ 899 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 900 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 901 return; 902 } 903 904 // store first fragment and tweak acl length for complete package 905 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 906 conn->acl_recombination_pos = acl_length + 4; 907 conn->acl_recombination_length = l2cap_length; 908 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 909 } 910 break; 911 912 } 913 default: 914 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 915 return; 916 } 917 918 // execute main loop 919 hci_run(); 920 } 921 922 static void hci_shutdown_connection(hci_connection_t *conn){ 923 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 924 925 #ifdef ENABLE_CLASSIC 926 #ifdef ENABLE_SCO_OVER_HCI 927 int addr_type = conn->address_type; 928 #endif 929 #endif 930 931 btstack_run_loop_remove_timer(&conn->timeout); 932 933 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 934 btstack_memory_hci_connection_free( conn ); 935 936 // now it's gone 937 hci_emit_nr_connections_changed(); 938 939 #ifdef ENABLE_CLASSIC 940 #ifdef ENABLE_SCO_OVER_HCI 941 // update SCO 942 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 943 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 944 } 945 #endif 946 #endif 947 } 948 949 #ifdef ENABLE_CLASSIC 950 951 static const uint16_t packet_type_sizes[] = { 952 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 953 HCI_ACL_DH1_SIZE, 0, 0, 0, 954 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 955 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 956 }; 957 static const uint8_t packet_type_feature_requirement_bit[] = { 958 0, // 3 slot packets 959 1, // 5 slot packets 960 25, // EDR 2 mpbs 961 26, // EDR 3 mbps 962 39, // 3 slot EDR packts 963 40, // 5 slot EDR packet 964 }; 965 static const uint16_t packet_type_feature_packet_mask[] = { 966 0x0f00, // 3 slot packets 967 0xf000, // 5 slot packets 968 0x1102, // EDR 2 mpbs 969 0x2204, // EDR 3 mbps 970 0x0300, // 3 slot EDR packts 971 0x3000, // 5 slot EDR packet 972 }; 973 974 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 975 // enable packet types based on size 976 uint16_t packet_types = 0; 977 unsigned int i; 978 for (i=0;i<16;i++){ 979 if (packet_type_sizes[i] == 0) continue; 980 if (packet_type_sizes[i] <= buffer_size){ 981 packet_types |= 1 << i; 982 } 983 } 984 // disable packet types due to missing local supported features 985 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 986 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 987 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 988 if (feature_set) continue; 989 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 990 packet_types &= ~packet_type_feature_packet_mask[i]; 991 } 992 // flip bits for "may not be used" 993 packet_types ^= 0x3306; 994 return packet_types; 995 } 996 997 uint16_t hci_usable_acl_packet_types(void){ 998 return hci_stack->packet_types; 999 } 1000 #endif 1001 1002 uint8_t* hci_get_outgoing_packet_buffer(void){ 1003 // hci packet buffer is >= acl data packet length 1004 return hci_stack->hci_packet_buffer; 1005 } 1006 1007 uint16_t hci_max_acl_data_packet_length(void){ 1008 return hci_stack->acl_data_packet_length; 1009 } 1010 1011 #ifdef ENABLE_CLASSIC 1012 int hci_extended_sco_link_supported(void){ 1013 // No. 31, byte 3, bit 7 1014 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1015 } 1016 #endif 1017 1018 int hci_non_flushable_packet_boundary_flag_supported(void){ 1019 // No. 54, byte 6, bit 6 1020 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 1021 } 1022 1023 static int gap_ssp_supported(void){ 1024 // No. 51, byte 6, bit 3 1025 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 1026 } 1027 1028 static int hci_classic_supported(void){ 1029 #ifdef ENABLE_CLASSIC 1030 // No. 37, byte 4, bit 5, = No BR/EDR Support 1031 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1032 #else 1033 return 0; 1034 #endif 1035 } 1036 1037 static int hci_le_supported(void){ 1038 #ifdef ENABLE_BLE 1039 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1040 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1041 #else 1042 return 0; 1043 #endif 1044 } 1045 1046 #ifdef ENABLE_BLE 1047 1048 /** 1049 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1050 */ 1051 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1052 *addr_type = hci_stack->le_own_addr_type; 1053 if (hci_stack->le_own_addr_type){ 1054 memcpy(addr, hci_stack->le_random_address, 6); 1055 } else { 1056 memcpy(addr, hci_stack->local_bd_addr, 6); 1057 } 1058 } 1059 1060 #ifdef ENABLE_LE_CENTRAL 1061 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1062 1063 int offset = 3; 1064 int num_reports = packet[offset]; 1065 offset += 1; 1066 1067 int i; 1068 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1069 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1070 for (i=0; i<num_reports && offset < size;i++){ 1071 // sanity checks on data_length: 1072 uint8_t data_length = packet[offset + 8]; 1073 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1074 if (offset + 9 + data_length + 1 > size) return; 1075 // setup event 1076 uint8_t event_size = 10 + data_length; 1077 int pos = 0; 1078 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1079 event[pos++] = event_size; 1080 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 1081 offset += 8; 1082 pos += 8; 1083 event[pos++] = packet[offset + 1 + data_length]; // rssi 1084 event[pos++] = data_length; 1085 offset++; 1086 memcpy(&event[pos], &packet[offset], data_length); 1087 pos += data_length; 1088 offset += data_length + 1; // rssi 1089 hci_emit_event(event, pos, 1); 1090 } 1091 } 1092 #endif 1093 #endif 1094 1095 #ifdef ENABLE_BLE 1096 #ifdef ENABLE_LE_PERIPHERAL 1097 static void hci_reenable_advertisements_if_needed(void){ 1098 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1099 // get number of active le slave connections 1100 int num_slave_connections = 0; 1101 btstack_linked_list_iterator_t it; 1102 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1103 while (btstack_linked_list_iterator_has_next(&it)){ 1104 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1105 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1106 if (con->state != OPEN) continue; 1107 if (con->role != HCI_ROLE_SLAVE) continue; 1108 if (!hci_is_le_connection(con)) continue; 1109 num_slave_connections++; 1110 } 1111 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1112 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1113 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1114 } 1115 } 1116 } 1117 #endif 1118 #endif 1119 1120 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1121 1122 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1123 if (!hci_stack->config) return 0; 1124 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1125 // Limit baud rate for Broadcom chipsets to 3 mbps 1126 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 1127 baud_rate = 3000000; 1128 } 1129 return baud_rate; 1130 } 1131 1132 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1133 UNUSED(ds); 1134 1135 switch (hci_stack->substate){ 1136 case HCI_INIT_W4_SEND_RESET: 1137 log_info("Resend HCI Reset"); 1138 hci_stack->substate = HCI_INIT_SEND_RESET; 1139 hci_stack->num_cmd_packets = 1; 1140 hci_run(); 1141 break; 1142 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1143 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1144 if (hci_stack->hci_transport->reset_link){ 1145 hci_stack->hci_transport->reset_link(); 1146 } 1147 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1148 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1149 log_info("Resend HCI Reset - CSR Warm Boot"); 1150 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1151 hci_stack->num_cmd_packets = 1; 1152 hci_run(); 1153 break; 1154 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1155 if (hci_stack->hci_transport->set_baudrate){ 1156 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1157 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1158 hci_stack->hci_transport->set_baudrate(baud_rate); 1159 } 1160 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1161 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1162 if (hci_stack->hci_transport->reset_link){ 1163 log_info("Link Reset"); 1164 hci_stack->hci_transport->reset_link(); 1165 } 1166 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1167 hci_run(); 1168 } 1169 break; 1170 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1171 // otherwise continue 1172 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1173 hci_send_cmd(&hci_read_local_supported_commands); 1174 break; 1175 default: 1176 break; 1177 } 1178 } 1179 #endif 1180 1181 static void hci_initializing_next_state(void){ 1182 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1183 } 1184 1185 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_PERIPHERAL) 1186 static void hci_replace_bd_addr_placeholder(uint8_t * data, uint16_t size){ 1187 const int bd_addr_string_len = 17; 1188 int i = 0; 1189 while (i < size - bd_addr_string_len){ 1190 if (memcmp(&data[i], "00:00:00:00:00:00", bd_addr_string_len)) { 1191 i++; 1192 continue; 1193 } 1194 // set real address 1195 memcpy(&data[i], bd_addr_to_str(hci_stack->local_bd_addr), bd_addr_string_len); 1196 i += bd_addr_string_len; 1197 } 1198 } 1199 #endif 1200 1201 // assumption: hci_can_send_command_packet_now() == true 1202 static void hci_initializing_run(void){ 1203 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1204 switch (hci_stack->substate){ 1205 case HCI_INIT_SEND_RESET: 1206 hci_state_reset(); 1207 1208 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1209 // prepare reset if command complete not received in 100ms 1210 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1211 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1212 btstack_run_loop_add_timer(&hci_stack->timeout); 1213 #endif 1214 // send command 1215 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1216 hci_send_cmd(&hci_reset); 1217 break; 1218 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1219 hci_send_cmd(&hci_read_local_version_information); 1220 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1221 break; 1222 case HCI_INIT_SEND_READ_LOCAL_NAME: 1223 hci_send_cmd(&hci_read_local_name); 1224 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1225 break; 1226 1227 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1228 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1229 hci_state_reset(); 1230 // prepare reset if command complete not received in 100ms 1231 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1232 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1233 btstack_run_loop_add_timer(&hci_stack->timeout); 1234 // send command 1235 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1236 hci_send_cmd(&hci_reset); 1237 break; 1238 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1239 hci_state_reset(); 1240 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1241 hci_send_cmd(&hci_reset); 1242 break; 1243 case HCI_INIT_SEND_BAUD_CHANGE: { 1244 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1245 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1246 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1247 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1248 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1249 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1250 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1251 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1252 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1253 btstack_run_loop_add_timer(&hci_stack->timeout); 1254 } 1255 break; 1256 } 1257 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1258 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1259 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1260 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1261 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1262 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1263 break; 1264 } 1265 case HCI_INIT_CUSTOM_INIT: 1266 // Custom initialization 1267 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1268 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1269 if (valid_cmd){ 1270 int size = 3 + hci_stack->hci_packet_buffer[2]; 1271 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1272 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1273 switch (valid_cmd) { 1274 case BTSTACK_CHIPSET_VALID_COMMAND: 1275 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1276 break; 1277 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1278 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1279 log_info("CSR Warm Boot"); 1280 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1281 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1282 btstack_run_loop_add_timer(&hci_stack->timeout); 1283 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1284 && hci_stack->config 1285 && hci_stack->chipset 1286 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1287 && hci_stack->hci_transport->set_baudrate 1288 && hci_transport_uart_get_main_baud_rate()){ 1289 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1290 } else { 1291 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1292 } 1293 break; 1294 default: 1295 // should not get here 1296 break; 1297 } 1298 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1299 break; 1300 } 1301 log_info("Init script done"); 1302 1303 // Init script download on Broadcom chipsets causes: 1304 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION 1305 || hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA){ 1306 1307 // - baud rate to reset, restore UART baud rate if needed 1308 int need_baud_change = hci_stack->config 1309 && hci_stack->chipset 1310 && hci_stack->chipset->set_baudrate_command 1311 && hci_stack->hci_transport->set_baudrate 1312 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1313 if (need_baud_change) { 1314 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1315 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1316 hci_stack->hci_transport->set_baudrate(baud_rate); 1317 } 1318 1319 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1320 // -> Work around: wait a few milliseconds here. 1321 log_info("BCM delay after init script"); 1322 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1323 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1324 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1325 btstack_run_loop_add_timer(&hci_stack->timeout); 1326 break; 1327 } 1328 } 1329 // otherwise continue 1330 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1331 hci_send_cmd(&hci_read_local_supported_commands); 1332 break; 1333 case HCI_INIT_SET_BD_ADDR: 1334 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1335 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1336 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1337 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1338 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1339 break; 1340 #endif 1341 1342 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1343 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1344 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1345 hci_send_cmd(&hci_read_local_supported_commands); 1346 break; 1347 case HCI_INIT_READ_BD_ADDR: 1348 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1349 hci_send_cmd(&hci_read_bd_addr); 1350 break; 1351 case HCI_INIT_READ_BUFFER_SIZE: 1352 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1353 hci_send_cmd(&hci_read_buffer_size); 1354 break; 1355 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1356 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1357 hci_send_cmd(&hci_read_local_supported_features); 1358 break; 1359 1360 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1361 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1362 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1363 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1364 break; 1365 case HCI_INIT_HOST_BUFFER_SIZE: 1366 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1367 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1368 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1369 break; 1370 #endif 1371 1372 case HCI_INIT_SET_EVENT_MASK: 1373 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1374 if (hci_le_supported()){ 1375 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1376 } else { 1377 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1378 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1379 } 1380 break; 1381 1382 #ifdef ENABLE_CLASSIC 1383 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1384 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1385 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1386 break; 1387 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1388 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1389 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1390 break; 1391 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1392 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1393 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1394 break; 1395 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1396 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1397 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1398 break; 1399 case HCI_INIT_WRITE_LOCAL_NAME: { 1400 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1401 hci_reserve_packet_buffer(); 1402 uint8_t * packet = hci_stack->hci_packet_buffer; 1403 // construct HCI Command and send 1404 uint16_t opcode = hci_write_local_name.opcode; 1405 hci_stack->last_cmd_opcode = opcode; 1406 packet[0] = opcode & 0xff; 1407 packet[1] = opcode >> 8; 1408 packet[2] = DEVICE_NAME_LEN; 1409 memset(&packet[3], 0, DEVICE_NAME_LEN); 1410 memcpy(&packet[3], hci_stack->local_name, strlen(hci_stack->local_name)); 1411 // expand '00:00:00:00:00:00' in name with bd_addr 1412 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1413 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1414 break; 1415 } 1416 case HCI_INIT_WRITE_EIR_DATA: { 1417 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1418 hci_reserve_packet_buffer(); 1419 uint8_t * packet = hci_stack->hci_packet_buffer; 1420 // construct HCI Command and send 1421 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1422 hci_stack->last_cmd_opcode = opcode; 1423 packet[0] = opcode & 0xff; 1424 packet[1] = opcode >> 8; 1425 packet[2] = 1 + 240; 1426 packet[3] = 0; // FEC not required 1427 if (hci_stack->eir_data){ 1428 memcpy(&packet[4], hci_stack->eir_data, 240); 1429 } else { 1430 memset(&packet[4], 0, 240); 1431 int name_len = strlen(hci_stack->local_name); 1432 packet[4] = name_len + 1; 1433 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1434 memcpy(&packet[6], hci_stack->local_name, name_len); 1435 } 1436 // expand '00:00:00:00:00:00' in name with bd_addr 1437 hci_replace_bd_addr_placeholder(&packet[4], 240); 1438 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1439 break; 1440 } 1441 case HCI_INIT_WRITE_INQUIRY_MODE: 1442 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1443 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1444 break; 1445 case HCI_INIT_WRITE_SCAN_ENABLE: 1446 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1447 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1448 break; 1449 // only sent if ENABLE_SCO_OVER_HCI is defined 1450 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1451 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1452 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1453 break; 1454 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1455 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1456 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1457 break; 1458 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1459 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1460 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1461 log_info("BCM: Route SCO data via HCI transport"); 1462 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1463 break; 1464 1465 #endif 1466 #ifdef ENABLE_BLE 1467 // LE INIT 1468 case HCI_INIT_LE_READ_BUFFER_SIZE: 1469 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1470 hci_send_cmd(&hci_le_read_buffer_size); 1471 break; 1472 case HCI_INIT_LE_SET_EVENT_MASK: 1473 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1474 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1475 break; 1476 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1477 // LE Supported Host = 1, Simultaneous Host = 0 1478 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1479 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1480 break; 1481 #endif 1482 1483 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1484 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1485 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1486 hci_send_cmd(&hci_le_read_maximum_data_length); 1487 break; 1488 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1489 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1490 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1491 break; 1492 #endif 1493 1494 #ifdef ENABLE_LE_CENTRAL 1495 case HCI_INIT_READ_WHITE_LIST_SIZE: 1496 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1497 hci_send_cmd(&hci_le_read_white_list_size); 1498 break; 1499 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1500 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1501 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1502 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1503 break; 1504 #endif 1505 default: 1506 return; 1507 } 1508 } 1509 1510 static void hci_init_done(void){ 1511 // done. tell the app 1512 log_info("hci_init_done -> HCI_STATE_WORKING"); 1513 hci_stack->state = HCI_STATE_WORKING; 1514 hci_emit_state(); 1515 hci_run(); 1516 } 1517 1518 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1519 1520 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1521 1522 uint8_t command_completed = 0; 1523 1524 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1525 uint16_t opcode = little_endian_read_16(packet,3); 1526 if (opcode == hci_stack->last_cmd_opcode){ 1527 command_completed = 1; 1528 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1529 } else { 1530 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1531 } 1532 } 1533 1534 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1535 uint8_t status = packet[2]; 1536 uint16_t opcode = little_endian_read_16(packet,4); 1537 if (opcode == hci_stack->last_cmd_opcode){ 1538 if (status){ 1539 command_completed = 1; 1540 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1541 } else { 1542 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1543 } 1544 } else { 1545 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1546 } 1547 } 1548 1549 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1550 1551 // Vendor == CSR 1552 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1553 // TODO: track actual command 1554 command_completed = 1; 1555 } 1556 1557 // Vendor == Toshiba 1558 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1559 // TODO: track actual command 1560 command_completed = 1; 1561 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1562 hci_stack->num_cmd_packets = 1; 1563 } 1564 1565 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1566 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1567 // 1568 // HCI Reset 1569 // Timeout 100 ms 1570 // HCI Reset 1571 // Command Complete Reset 1572 // HCI Read Local Version Information 1573 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1574 // hang... 1575 // 1576 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1577 if (!command_completed 1578 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1579 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1580 1581 uint16_t opcode = little_endian_read_16(packet,3); 1582 if (opcode == hci_reset.opcode){ 1583 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1584 return; 1585 } 1586 } 1587 1588 // CSR & H5 1589 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1590 if (!command_completed 1591 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1592 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1593 1594 uint16_t opcode = little_endian_read_16(packet,3); 1595 if (opcode == hci_reset.opcode){ 1596 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1597 return; 1598 } 1599 } 1600 1601 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1602 // fix: Correct substate and behave as command below 1603 if (command_completed){ 1604 switch (hci_stack->substate){ 1605 case HCI_INIT_SEND_RESET: 1606 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1607 break; 1608 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1609 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1610 break; 1611 default: 1612 break; 1613 } 1614 } 1615 1616 #endif 1617 1618 if (!command_completed) return; 1619 1620 int need_baud_change = 0; 1621 int need_addr_change = 0; 1622 1623 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1624 need_baud_change = hci_stack->config 1625 && hci_stack->chipset 1626 && hci_stack->chipset->set_baudrate_command 1627 && hci_stack->hci_transport->set_baudrate 1628 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1629 1630 need_addr_change = hci_stack->custom_bd_addr_set 1631 && hci_stack->chipset 1632 && hci_stack->chipset->set_bd_addr_command; 1633 #endif 1634 1635 switch(hci_stack->substate){ 1636 1637 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1638 case HCI_INIT_SEND_RESET: 1639 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1640 // fix: just correct substate and behave as command below 1641 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1642 btstack_run_loop_remove_timer(&hci_stack->timeout); 1643 break; 1644 case HCI_INIT_W4_SEND_RESET: 1645 btstack_run_loop_remove_timer(&hci_stack->timeout); 1646 break; 1647 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1648 log_info("Received local name, need baud change %d", need_baud_change); 1649 if (need_baud_change){ 1650 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1651 return; 1652 } 1653 // skip baud change 1654 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1655 return; 1656 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1657 // for STLC2500D, baud rate change already happened. 1658 // for others, baud rate gets changed now 1659 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1660 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1661 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1662 hci_stack->hci_transport->set_baudrate(baud_rate); 1663 } 1664 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1665 return; 1666 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1667 btstack_run_loop_remove_timer(&hci_stack->timeout); 1668 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1669 return; 1670 case HCI_INIT_W4_CUSTOM_INIT: 1671 // repeat custom init 1672 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1673 return; 1674 #else 1675 case HCI_INIT_W4_SEND_RESET: 1676 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1677 return ; 1678 #endif 1679 1680 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1681 if (need_baud_change && 1682 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1683 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1684 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1685 return; 1686 } 1687 if (need_addr_change){ 1688 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1689 return; 1690 } 1691 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1692 return; 1693 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1694 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1695 if (need_baud_change){ 1696 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1697 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1698 hci_stack->hci_transport->set_baudrate(baud_rate); 1699 } 1700 if (need_addr_change){ 1701 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1702 return; 1703 } 1704 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1705 return; 1706 case HCI_INIT_W4_SET_BD_ADDR: 1707 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1708 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1709 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1710 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1711 return; 1712 } 1713 // skipping st warm boot 1714 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1715 return; 1716 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1717 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1718 return; 1719 #endif 1720 case HCI_INIT_W4_READ_BD_ADDR: 1721 // only read buffer size if supported 1722 if (hci_stack->local_supported_commands[0] & 0x01) { 1723 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1724 return; 1725 } 1726 // skipping read buffer size 1727 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1728 return; 1729 case HCI_INIT_W4_SET_EVENT_MASK: 1730 // skip Classic init commands for LE only chipsets 1731 if (!hci_classic_supported()){ 1732 #ifdef ENABLE_BLE 1733 if (hci_le_supported()){ 1734 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1735 return; 1736 } 1737 #endif 1738 log_error("Neither BR/EDR nor LE supported"); 1739 hci_init_done(); 1740 return; 1741 } 1742 if (!gap_ssp_supported()){ 1743 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1744 return; 1745 } 1746 break; 1747 #ifdef ENABLE_BLE 1748 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1749 // skip write le host if not supported (e.g. on LE only EM9301) 1750 if (hci_stack->local_supported_commands[0] & 0x02) break; 1751 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1752 return; 1753 1754 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1755 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1756 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1757 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1758 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1759 return; 1760 } 1761 // explicit fall through to reduce repetitions 1762 1763 #ifdef ENABLE_LE_CENTRAL 1764 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1765 #else 1766 hci_init_done(); 1767 #endif 1768 return; 1769 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1770 1771 #endif /* ENABLE_BLE */ 1772 1773 #ifdef ENABLE_SCO_OVER_HCI 1774 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1775 // skip write synchronous flow control if not supported 1776 if (hci_stack->local_supported_commands[0] & 0x04) break; 1777 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1778 // explicit fall through to reduce repetitions 1779 1780 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1781 // skip write default erroneous data reporting if not supported 1782 if (hci_stack->local_supported_commands[0] & 0x08) break; 1783 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1784 // explicit fall through to reduce repetitions 1785 1786 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1787 // skip bcm set sco pcm config on non-Broadcom chipsets 1788 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1789 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1790 // explicit fall through to reduce repetitions 1791 1792 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1793 if (!hci_le_supported()){ 1794 // SKIP LE init for Classic only configuration 1795 hci_init_done(); 1796 return; 1797 } 1798 break; 1799 1800 #else /* !ENABLE_SCO_OVER_HCI */ 1801 1802 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1803 #ifdef ENABLE_BLE 1804 if (hci_le_supported()){ 1805 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1806 return; 1807 } 1808 #endif 1809 // SKIP LE init for Classic only configuration 1810 hci_init_done(); 1811 return; 1812 #endif /* ENABLE_SCO_OVER_HCI */ 1813 1814 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1815 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1816 // Response to command before init done state -> init done 1817 case (HCI_INIT_DONE-1): 1818 hci_init_done(); 1819 return; 1820 #endif 1821 1822 default: 1823 break; 1824 } 1825 hci_initializing_next_state(); 1826 } 1827 1828 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1829 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1830 bd_addr_t bd_address; 1831 memcpy(&bd_address, conn->address, 6); 1832 1833 #ifdef ENABLE_CLASSIC 1834 // cache needed data 1835 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1836 #endif 1837 1838 // connection failed, remove entry 1839 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1840 btstack_memory_hci_connection_free( conn ); 1841 1842 #ifdef ENABLE_CLASSIC 1843 // notify client if dedicated bonding 1844 if (notify_dedicated_bonding_failed){ 1845 log_info("hci notify_dedicated_bonding_failed"); 1846 hci_emit_dedicated_bonding_result(bd_address, status); 1847 } 1848 1849 // if authentication error, also delete link key 1850 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1851 gap_drop_link_key_for_bd_addr(bd_address); 1852 } 1853 #endif 1854 } 1855 1856 static void event_handler(uint8_t *packet, int size){ 1857 1858 uint16_t event_length = packet[1]; 1859 1860 // assert packet is complete 1861 if (size != event_length + 2){ 1862 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1863 return; 1864 } 1865 1866 bd_addr_t addr; 1867 bd_addr_type_t addr_type; 1868 hci_con_handle_t handle; 1869 hci_connection_t * conn; 1870 int i; 1871 int create_connection_cmd; 1872 1873 #ifdef ENABLE_CLASSIC 1874 uint8_t link_type; 1875 #endif 1876 1877 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1878 1879 switch (hci_event_packet_get_type(packet)) { 1880 1881 case HCI_EVENT_COMMAND_COMPLETE: 1882 // get num cmd packets - limit to 1 to reduce complexity 1883 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1884 1885 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1886 if (packet[5]) break; 1887 // terminate, name 248 chars 1888 packet[6+248] = 0; 1889 log_info("local name: %s", &packet[6]); 1890 } 1891 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1892 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1893 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1894 uint16_t acl_len = little_endian_read_16(packet, 6); 1895 uint16_t sco_len = packet[8]; 1896 1897 // determine usable ACL/SCO payload size 1898 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1899 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1900 1901 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1902 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1903 1904 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1905 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1906 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1907 } 1908 } 1909 #ifdef ENABLE_BLE 1910 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1911 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1912 hci_stack->le_acl_packets_total_num = packet[8]; 1913 // determine usable ACL payload size 1914 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1915 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1916 } 1917 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1918 } 1919 #endif 1920 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1921 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1922 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1923 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1924 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); 1925 } 1926 #endif 1927 #ifdef ENABLE_LE_CENTRAL 1928 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1929 hci_stack->le_whitelist_capacity = packet[6]; 1930 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1931 } 1932 #endif 1933 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1934 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1935 hci_stack->local_bd_addr); 1936 log_info("Local Address, Status: 0x%02x: Addr: %s", 1937 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1938 #ifdef ENABLE_CLASSIC 1939 if (hci_stack->link_key_db){ 1940 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1941 } 1942 #endif 1943 } 1944 #ifdef ENABLE_CLASSIC 1945 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1946 hci_emit_discoverable_enabled(hci_stack->discoverable); 1947 } 1948 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1949 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1950 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1951 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1952 hci_emit_event(event, sizeof(event), 1); 1953 } 1954 } 1955 #endif 1956 1957 // Note: HCI init checks 1958 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1959 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1960 1961 #ifdef ENABLE_CLASSIC 1962 // determine usable ACL packet types based on host buffer size and supported features 1963 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1964 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1965 #endif 1966 // Classic/LE 1967 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1968 } 1969 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1970 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1971 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1972 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1973 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1974 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1975 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1976 } 1977 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1978 hci_stack->local_supported_commands[0] = 1979 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 / Read Buffer Size 1980 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 1981 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 1982 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 1983 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 1984 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2 | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 1985 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1; // bit 6 = Octet 35, bit 5 / LE Set Default PHY 1986 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1987 } 1988 #ifdef ENABLE_CLASSIC 1989 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1990 if (packet[5] == 0){ 1991 hci_stack->synchronous_flow_control_enabled = 1; 1992 } 1993 } 1994 #endif 1995 break; 1996 1997 case HCI_EVENT_COMMAND_STATUS: 1998 // get num cmd packets - limit to 1 to reduce complexity 1999 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2000 2001 // check command status to detected failed outgoing connections 2002 create_connection_cmd = 0; 2003 #ifdef ENABLE_CLASSIC 2004 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2005 create_connection_cmd = 1; 2006 } 2007 #endif 2008 #ifdef ENABLE_LE_CENTRAL 2009 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2010 create_connection_cmd = 1; 2011 } 2012 #endif 2013 if (create_connection_cmd) { 2014 uint8_t status = hci_event_command_status_get_status(packet); 2015 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2016 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); 2017 2018 // reset outgoing address info 2019 memset(hci_stack->outgoing_addr, 0, 6); 2020 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2021 2022 // error => outgoing connection failed 2023 if ((conn != NULL) && (status != 0)){ 2024 hci_handle_connection_failed(conn, status); 2025 } 2026 } 2027 break; 2028 2029 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2030 int offset = 3; 2031 for (i=0; i<packet[2];i++){ 2032 handle = little_endian_read_16(packet, offset) & 0x0fff; 2033 offset += 2; 2034 uint16_t num_packets = little_endian_read_16(packet, offset); 2035 offset += 2; 2036 2037 conn = hci_connection_for_handle(handle); 2038 if (!conn){ 2039 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2040 continue; 2041 } 2042 2043 if (conn->num_packets_sent >= num_packets){ 2044 conn->num_packets_sent -= num_packets; 2045 } else { 2046 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2047 conn->num_packets_sent = 0; 2048 } 2049 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2050 2051 #ifdef ENABLE_CLASSIC 2052 // For SCO, we do the can_send_now_check here 2053 hci_notify_if_sco_can_send_now(); 2054 #endif 2055 } 2056 break; 2057 } 2058 2059 #ifdef ENABLE_CLASSIC 2060 case HCI_EVENT_INQUIRY_COMPLETE: 2061 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2062 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2063 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2064 hci_emit_event(event, sizeof(event), 1); 2065 } 2066 break; 2067 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2068 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2069 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2070 } 2071 break; 2072 case HCI_EVENT_CONNECTION_REQUEST: 2073 reverse_bd_addr(&packet[2], addr); 2074 // TODO: eval COD 8-10 2075 link_type = packet[11]; 2076 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2077 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 2078 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2079 if (!conn) { 2080 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2081 } 2082 if (!conn) { 2083 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2084 hci_stack->decline_reason = 0x0d; 2085 bd_addr_copy(hci_stack->decline_addr, addr); 2086 break; 2087 } 2088 conn->role = HCI_ROLE_SLAVE; 2089 conn->state = RECEIVED_CONNECTION_REQUEST; 2090 // store info about eSCO 2091 if (link_type == 0x02){ 2092 conn->remote_supported_feature_eSCO = 1; 2093 } 2094 hci_run(); 2095 break; 2096 2097 case HCI_EVENT_CONNECTION_COMPLETE: 2098 // Connection management 2099 reverse_bd_addr(&packet[5], addr); 2100 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2101 addr_type = BD_ADDR_TYPE_CLASSIC; 2102 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2103 if (conn) { 2104 if (!packet[2]){ 2105 conn->state = OPEN; 2106 conn->con_handle = little_endian_read_16(packet, 3); 2107 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2108 2109 // restart timer 2110 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2111 btstack_run_loop_add_timer(&conn->timeout); 2112 2113 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2114 2115 hci_emit_nr_connections_changed(); 2116 } else { 2117 // connection failed 2118 hci_handle_connection_failed(conn, packet[2]); 2119 } 2120 } 2121 break; 2122 2123 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2124 reverse_bd_addr(&packet[5], addr); 2125 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2126 if (packet[2]){ 2127 // connection failed 2128 break; 2129 } 2130 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2131 if (!conn) { 2132 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2133 } 2134 if (!conn) { 2135 break; 2136 } 2137 conn->state = OPEN; 2138 conn->con_handle = little_endian_read_16(packet, 3); 2139 2140 #ifdef ENABLE_SCO_OVER_HCI 2141 // update SCO 2142 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2143 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2144 } 2145 #endif 2146 break; 2147 2148 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2149 handle = little_endian_read_16(packet, 3); 2150 conn = hci_connection_for_handle(handle); 2151 if (!conn) break; 2152 if (!packet[2]){ 2153 uint8_t * features = &packet[5]; 2154 if (features[6] & (1 << 3)){ 2155 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2156 } 2157 if (features[3] & (1<<7)){ 2158 conn->remote_supported_feature_eSCO = 1; 2159 } 2160 } 2161 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2162 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2163 if (conn->bonding_flags & BONDING_DEDICATED){ 2164 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2165 } 2166 break; 2167 2168 case HCI_EVENT_LINK_KEY_REQUEST: 2169 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2170 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2171 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2172 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2173 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2174 hci_run(); 2175 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2176 return; 2177 2178 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2179 reverse_bd_addr(&packet[2], addr); 2180 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2181 if (!conn) break; 2182 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2183 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2184 // Change Connection Encryption keeps link key type 2185 if (link_key_type != CHANGED_COMBINATION_KEY){ 2186 conn->link_key_type = link_key_type; 2187 } 2188 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2189 // still forward event to allow dismiss of pairing dialog 2190 break; 2191 } 2192 2193 case HCI_EVENT_PIN_CODE_REQUEST: 2194 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2195 // non-bondable mode: pin code negative reply will be sent 2196 if (!hci_stack->bondable){ 2197 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2198 hci_run(); 2199 return; 2200 } 2201 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2202 if (!hci_stack->link_key_db) break; 2203 hci_event_pin_code_request_get_bd_addr(packet, addr); 2204 hci_stack->link_key_db->delete_link_key(addr); 2205 break; 2206 2207 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2208 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2209 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2210 break; 2211 2212 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2213 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2214 if (!hci_stack->ssp_auto_accept) break; 2215 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2216 break; 2217 2218 case HCI_EVENT_USER_PASSKEY_REQUEST: 2219 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2220 if (!hci_stack->ssp_auto_accept) break; 2221 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2222 break; 2223 case HCI_EVENT_MODE_CHANGE: 2224 handle = hci_event_mode_change_get_handle(packet); 2225 conn = hci_connection_for_handle(handle); 2226 if (!conn) break; 2227 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2228 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2229 break; 2230 #endif 2231 2232 case HCI_EVENT_ENCRYPTION_CHANGE: 2233 handle = little_endian_read_16(packet, 3); 2234 conn = hci_connection_for_handle(handle); 2235 if (!conn) break; 2236 if (packet[2] == 0) { 2237 if (packet[5]){ 2238 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2239 } else { 2240 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2241 } 2242 } 2243 #ifdef ENABLE_CLASSIC 2244 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2245 #endif 2246 break; 2247 2248 #ifdef ENABLE_CLASSIC 2249 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2250 handle = little_endian_read_16(packet, 3); 2251 conn = hci_connection_for_handle(handle); 2252 if (!conn) break; 2253 2254 // dedicated bonding: send result and disconnect 2255 if (conn->bonding_flags & BONDING_DEDICATED){ 2256 conn->bonding_flags &= ~BONDING_DEDICATED; 2257 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2258 conn->bonding_status = packet[2]; 2259 break; 2260 } 2261 2262 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2263 // link key sufficient for requested security 2264 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2265 break; 2266 } 2267 // not enough 2268 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2269 break; 2270 #endif 2271 2272 // HCI_EVENT_DISCONNECTION_COMPLETE 2273 // has been split, to first notify stack before shutting connection down 2274 // see end of function, too. 2275 case HCI_EVENT_DISCONNECTION_COMPLETE: 2276 if (packet[2]) break; // status != 0 2277 handle = little_endian_read_16(packet, 3); 2278 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2279 if (hci_stack->acl_fragmentation_total_size > 0) { 2280 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2281 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2282 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2283 hci_stack->acl_fragmentation_total_size = 0; 2284 hci_stack->acl_fragmentation_pos = 0; 2285 if (release_buffer){ 2286 hci_release_packet_buffer(); 2287 } 2288 } 2289 } 2290 2291 // re-enable advertisements for le connections if active 2292 conn = hci_connection_for_handle(handle); 2293 if (!conn) break; 2294 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2295 #ifdef ENABLE_BLE 2296 #ifdef ENABLE_LE_PERIPHERAL 2297 if (hci_is_le_connection(conn)){ 2298 hci_reenable_advertisements_if_needed(); 2299 } 2300 #endif 2301 #endif 2302 break; 2303 2304 case HCI_EVENT_HARDWARE_ERROR: 2305 log_error("Hardware Error: 0x%02x", packet[2]); 2306 if (hci_stack->hardware_error_callback){ 2307 (*hci_stack->hardware_error_callback)(packet[2]); 2308 } else { 2309 // if no special requests, just reboot stack 2310 hci_power_control_off(); 2311 hci_power_control_on(); 2312 } 2313 break; 2314 2315 #ifdef ENABLE_CLASSIC 2316 case HCI_EVENT_ROLE_CHANGE: 2317 if (packet[2]) break; // status != 0 2318 reverse_bd_addr(&packet[3], addr); 2319 addr_type = BD_ADDR_TYPE_CLASSIC; 2320 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2321 if (!conn) break; 2322 conn->role = packet[9]; 2323 break; 2324 #endif 2325 2326 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2327 // release packet buffer only for asynchronous transport and if there are not further fragements 2328 if (hci_transport_synchronous()) { 2329 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2330 return; // instead of break: to avoid re-entering hci_run() 2331 } 2332 hci_stack->acl_fragmentation_tx_active = 0; 2333 if (hci_stack->acl_fragmentation_total_size) break; 2334 hci_release_packet_buffer(); 2335 2336 // L2CAP receives this event via the hci_emit_event below 2337 2338 #ifdef ENABLE_CLASSIC 2339 // For SCO, we do the can_send_now_check here 2340 hci_notify_if_sco_can_send_now(); 2341 #endif 2342 break; 2343 2344 #ifdef ENABLE_CLASSIC 2345 case HCI_EVENT_SCO_CAN_SEND_NOW: 2346 // For SCO, we do the can_send_now_check here 2347 hci_notify_if_sco_can_send_now(); 2348 return; 2349 2350 // explode inquriy results for easier consumption 2351 case HCI_EVENT_INQUIRY_RESULT: 2352 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2353 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2354 gap_inquiry_explode(packet); 2355 break; 2356 #endif 2357 2358 #ifdef ENABLE_BLE 2359 case HCI_EVENT_LE_META: 2360 switch (packet[2]){ 2361 #ifdef ENABLE_LE_CENTRAL 2362 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2363 // log_info("advertising report received"); 2364 if (!hci_stack->le_scanning_enabled) break; 2365 le_handle_advertisement_report(packet, size); 2366 break; 2367 #endif 2368 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2369 // Connection management 2370 reverse_bd_addr(&packet[8], addr); 2371 addr_type = (bd_addr_type_t)packet[7]; 2372 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2373 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2374 2375 #ifdef ENABLE_LE_CENTRAL 2376 // if auto-connect, remove from whitelist in both roles 2377 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2378 hci_remove_from_whitelist(addr_type, addr); 2379 } 2380 // handle error: error is reported only to the initiator -> outgoing connection 2381 if (packet[3]){ 2382 2383 // handle cancelled outgoing connection 2384 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2385 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2386 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2387 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2388 conn = gap_get_outgoing_connection(); 2389 } 2390 2391 // outgoing connection establishment is done 2392 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2393 // remove entry 2394 if (conn){ 2395 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2396 btstack_memory_hci_connection_free( conn ); 2397 } 2398 break; 2399 } 2400 #endif 2401 // on success, both hosts receive connection complete event 2402 if (packet[6] == HCI_ROLE_MASTER){ 2403 #ifdef ENABLE_LE_CENTRAL 2404 // if we're master, it was an outgoing connection and we're done with it 2405 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2406 #endif 2407 } else { 2408 #ifdef ENABLE_LE_PERIPHERAL 2409 // if we're slave, it was an incoming connection, advertisements have stopped 2410 hci_stack->le_advertisements_active = 0; 2411 #endif 2412 } 2413 // LE connections are auto-accepted, so just create a connection if there isn't one already 2414 if (!conn){ 2415 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2416 } 2417 // no memory, sorry. 2418 if (!conn){ 2419 break; 2420 } 2421 2422 conn->state = OPEN; 2423 conn->role = packet[6]; 2424 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2425 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2426 2427 #ifdef ENABLE_LE_PERIPHERAL 2428 if (packet[6] == HCI_ROLE_SLAVE){ 2429 hci_reenable_advertisements_if_needed(); 2430 } 2431 #endif 2432 2433 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2434 2435 // restart timer 2436 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2437 // btstack_run_loop_add_timer(&conn->timeout); 2438 2439 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2440 2441 hci_emit_nr_connections_changed(); 2442 break; 2443 2444 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2445 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2446 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2447 conn = hci_connection_for_handle(handle); 2448 if (!conn) break; 2449 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2450 break; 2451 2452 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2453 // connection 2454 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2455 conn = hci_connection_for_handle(handle); 2456 if (conn) { 2457 // read arguments 2458 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2459 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2460 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2461 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2462 2463 // validate against current connection parameter range 2464 le_connection_parameter_range_t existing_range; 2465 gap_get_connection_parameter_range(&existing_range); 2466 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2467 if (update_parameter){ 2468 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2469 conn->le_conn_interval_min = le_conn_interval_min; 2470 conn->le_conn_interval_max = le_conn_interval_max; 2471 conn->le_conn_latency = le_conn_latency; 2472 conn->le_supervision_timeout = le_supervision_timeout; 2473 } else { 2474 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2475 } 2476 } 2477 break; 2478 default: 2479 break; 2480 } 2481 break; 2482 #endif 2483 case HCI_EVENT_VENDOR_SPECIFIC: 2484 // Vendor specific commands often create vendor specific event instead of num completed packets 2485 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2486 switch (hci_stack->manufacturer){ 2487 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2488 hci_stack->num_cmd_packets = 1; 2489 break; 2490 default: 2491 break; 2492 } 2493 break; 2494 default: 2495 break; 2496 } 2497 2498 // handle BT initialization 2499 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2500 hci_initializing_event_handler(packet, size); 2501 } 2502 2503 // help with BT sleep 2504 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2505 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2506 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2507 hci_initializing_next_state(); 2508 } 2509 2510 // notify upper stack 2511 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2512 2513 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2514 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2515 if (!packet[2]){ 2516 handle = little_endian_read_16(packet, 3); 2517 hci_connection_t * aConn = hci_connection_for_handle(handle); 2518 if (aConn) { 2519 uint8_t status = aConn->bonding_status; 2520 uint16_t flags = aConn->bonding_flags; 2521 bd_addr_t bd_address; 2522 memcpy(&bd_address, aConn->address, 6); 2523 hci_shutdown_connection(aConn); 2524 // connection struct is gone, don't access anymore 2525 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2526 hci_emit_dedicated_bonding_result(bd_address, status); 2527 } 2528 } 2529 } 2530 } 2531 2532 // execute main loop 2533 hci_run(); 2534 } 2535 2536 #ifdef ENABLE_CLASSIC 2537 static void sco_handler(uint8_t * packet, uint16_t size){ 2538 // lookup connection struct 2539 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2540 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2541 if (!conn) return; 2542 2543 int notify_sco = 0; 2544 2545 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2546 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2547 if (size == 83 && ((hci_stack->sco_voice_setting & 0x03) == 0x03)){ 2548 packet[2] = 0x3c; 2549 memmove(&packet[3], &packet[23], 63); 2550 size = 63; 2551 } 2552 } 2553 2554 // treat received SCO packets as indicator of successfully sent packet, if flow control is not explicite 2555 log_info("sco flow %u, handle 0x%04x, packets sent %u, bytes send %u", hci_stack->synchronous_flow_control_enabled, (int) con_handle, conn->num_packets_sent, conn->num_sco_bytes_sent); 2556 if (hci_stack->synchronous_flow_control_enabled == 0){ 2557 uint16_t sco_payload_len = size - 3; 2558 if (conn->num_sco_bytes_sent >= sco_payload_len){ 2559 conn->num_sco_bytes_sent -= sco_payload_len; 2560 } else { 2561 conn->num_sco_bytes_sent = 0; 2562 } 2563 notify_sco = 1; 2564 } 2565 // deliver to app 2566 if (hci_stack->sco_packet_handler) { 2567 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2568 } 2569 2570 // notify app if it can send again 2571 if (notify_sco){ 2572 hci_notify_if_sco_can_send_now(); 2573 } 2574 2575 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2576 conn->num_packets_completed++; 2577 hci_stack->host_completed_packets = 1; 2578 hci_run(); 2579 #endif 2580 } 2581 #endif 2582 2583 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2584 hci_dump_packet(packet_type, 1, packet, size); 2585 switch (packet_type) { 2586 case HCI_EVENT_PACKET: 2587 event_handler(packet, size); 2588 break; 2589 case HCI_ACL_DATA_PACKET: 2590 acl_handler(packet, size); 2591 break; 2592 #ifdef ENABLE_CLASSIC 2593 case HCI_SCO_DATA_PACKET: 2594 sco_handler(packet, size); 2595 break; 2596 #endif 2597 default: 2598 break; 2599 } 2600 } 2601 2602 /** 2603 * @brief Add event packet handler. 2604 */ 2605 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2606 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2607 } 2608 2609 2610 /** Register HCI packet handlers */ 2611 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2612 hci_stack->acl_packet_handler = handler; 2613 } 2614 2615 #ifdef ENABLE_CLASSIC 2616 /** 2617 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2618 */ 2619 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2620 hci_stack->sco_packet_handler = handler; 2621 } 2622 #endif 2623 2624 static void hci_state_reset(void){ 2625 // no connections yet 2626 hci_stack->connections = NULL; 2627 2628 // keep discoverable/connectable as this has been requested by the client(s) 2629 // hci_stack->discoverable = 0; 2630 // hci_stack->connectable = 0; 2631 // hci_stack->bondable = 1; 2632 // hci_stack->own_addr_type = 0; 2633 2634 // buffer is free 2635 hci_stack->hci_packet_buffer_reserved = 0; 2636 2637 // no pending cmds 2638 hci_stack->decline_reason = 0; 2639 hci_stack->new_scan_enable_value = 0xff; 2640 2641 // LE 2642 #ifdef ENABLE_BLE 2643 memset(hci_stack->le_random_address, 0, 6); 2644 hci_stack->le_random_address_set = 0; 2645 #endif 2646 #ifdef ENABLE_LE_CENTRAL 2647 hci_stack->le_scanning_active = 0; 2648 hci_stack->le_scan_type = 0xff; 2649 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2650 hci_stack->le_whitelist = 0; 2651 hci_stack->le_whitelist_capacity = 0; 2652 #endif 2653 } 2654 2655 #ifdef ENABLE_CLASSIC 2656 /** 2657 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2658 */ 2659 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2660 // store and open remote device db 2661 hci_stack->link_key_db = link_key_db; 2662 if (hci_stack->link_key_db) { 2663 hci_stack->link_key_db->open(); 2664 } 2665 } 2666 #endif 2667 2668 void hci_init(const hci_transport_t *transport, const void *config){ 2669 2670 #ifdef HAVE_MALLOC 2671 if (!hci_stack) { 2672 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2673 } 2674 #else 2675 hci_stack = &hci_stack_static; 2676 #endif 2677 memset(hci_stack, 0, sizeof(hci_stack_t)); 2678 2679 // reference to use transport layer implementation 2680 hci_stack->hci_transport = transport; 2681 2682 // reference to used config 2683 hci_stack->config = config; 2684 2685 // setup pointer for outgoing packet buffer 2686 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2687 2688 // max acl payload size defined in config.h 2689 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2690 2691 // register packet handlers with transport 2692 transport->register_packet_handler(&packet_handler); 2693 2694 hci_stack->state = HCI_STATE_OFF; 2695 2696 // class of device 2697 hci_stack->class_of_device = 0x007a020c; // Smartphone 2698 2699 // bondable by default 2700 hci_stack->bondable = 1; 2701 2702 #ifdef ENABLE_CLASSIC 2703 // classic name 2704 hci_stack->local_name = default_classic_name; 2705 2706 // Master slave policy 2707 hci_stack->master_slave_policy = 1; 2708 #endif 2709 2710 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2711 hci_stack->ssp_enable = 1; 2712 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2713 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2714 hci_stack->ssp_auto_accept = 1; 2715 2716 // voice setting - signed 16 bit pcm data with CVSD over the air 2717 hci_stack->sco_voice_setting = 0x60; 2718 2719 #ifdef ENABLE_LE_CENTRAL 2720 // connection parameter to use for outgoing connections 2721 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2722 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2723 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2724 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2725 hci_stack->le_connection_latency = 4; // 4 2726 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2727 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2728 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2729 #endif 2730 2731 #ifdef ENABLE_LE_PERIPHERAL 2732 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2733 #endif 2734 2735 // connection parameter range used to answer connection parameter update requests in l2cap 2736 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2737 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2738 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2739 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2740 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2741 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2742 2743 hci_state_reset(); 2744 } 2745 2746 /** 2747 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2748 */ 2749 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2750 hci_stack->chipset = chipset_driver; 2751 2752 // reset chipset driver - init is also called on power_up 2753 if (hci_stack->chipset && hci_stack->chipset->init){ 2754 hci_stack->chipset->init(hci_stack->config); 2755 } 2756 } 2757 2758 /** 2759 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2760 */ 2761 void hci_set_control(const btstack_control_t *hardware_control){ 2762 // references to used control implementation 2763 hci_stack->control = hardware_control; 2764 // init with transport config 2765 hardware_control->init(hci_stack->config); 2766 } 2767 2768 void hci_close(void){ 2769 // close remote device db 2770 if (hci_stack->link_key_db) { 2771 hci_stack->link_key_db->close(); 2772 } 2773 2774 btstack_linked_list_iterator_t lit; 2775 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2776 while (btstack_linked_list_iterator_has_next(&lit)){ 2777 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2778 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2779 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2780 hci_shutdown_connection(connection); 2781 } 2782 2783 hci_power_control(HCI_POWER_OFF); 2784 2785 #ifdef HAVE_MALLOC 2786 free(hci_stack); 2787 #endif 2788 hci_stack = NULL; 2789 } 2790 2791 #ifdef ENABLE_CLASSIC 2792 void gap_set_class_of_device(uint32_t class_of_device){ 2793 hci_stack->class_of_device = class_of_device; 2794 } 2795 2796 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 2797 hci_stack->default_link_policy_settings = default_link_policy_settings; 2798 } 2799 2800 void hci_disable_l2cap_timeout_check(void){ 2801 disable_l2cap_timeouts = 1; 2802 } 2803 #endif 2804 2805 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2806 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2807 void hci_set_bd_addr(bd_addr_t addr){ 2808 memcpy(hci_stack->custom_bd_addr, addr, 6); 2809 hci_stack->custom_bd_addr_set = 1; 2810 } 2811 #endif 2812 2813 // State-Module-Driver overview 2814 // state module low-level 2815 // HCI_STATE_OFF off close 2816 // HCI_STATE_INITIALIZING, on open 2817 // HCI_STATE_WORKING, on open 2818 // HCI_STATE_HALTING, on open 2819 // HCI_STATE_SLEEPING, off/sleep close 2820 // HCI_STATE_FALLING_ASLEEP on open 2821 2822 static int hci_power_control_on(void){ 2823 2824 // power on 2825 int err = 0; 2826 if (hci_stack->control && hci_stack->control->on){ 2827 err = (*hci_stack->control->on)(); 2828 } 2829 if (err){ 2830 log_error( "POWER_ON failed"); 2831 hci_emit_hci_open_failed(); 2832 return err; 2833 } 2834 2835 // int chipset driver 2836 if (hci_stack->chipset && hci_stack->chipset->init){ 2837 hci_stack->chipset->init(hci_stack->config); 2838 } 2839 2840 // init transport 2841 if (hci_stack->hci_transport->init){ 2842 hci_stack->hci_transport->init(hci_stack->config); 2843 } 2844 2845 // open transport 2846 err = hci_stack->hci_transport->open(); 2847 if (err){ 2848 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2849 if (hci_stack->control && hci_stack->control->off){ 2850 (*hci_stack->control->off)(); 2851 } 2852 hci_emit_hci_open_failed(); 2853 return err; 2854 } 2855 return 0; 2856 } 2857 2858 static void hci_power_control_off(void){ 2859 2860 log_info("hci_power_control_off"); 2861 2862 // close low-level device 2863 hci_stack->hci_transport->close(); 2864 2865 log_info("hci_power_control_off - hci_transport closed"); 2866 2867 // power off 2868 if (hci_stack->control && hci_stack->control->off){ 2869 (*hci_stack->control->off)(); 2870 } 2871 2872 log_info("hci_power_control_off - control closed"); 2873 2874 hci_stack->state = HCI_STATE_OFF; 2875 } 2876 2877 static void hci_power_control_sleep(void){ 2878 2879 log_info("hci_power_control_sleep"); 2880 2881 #if 0 2882 // don't close serial port during sleep 2883 2884 // close low-level device 2885 hci_stack->hci_transport->close(hci_stack->config); 2886 #endif 2887 2888 // sleep mode 2889 if (hci_stack->control && hci_stack->control->sleep){ 2890 (*hci_stack->control->sleep)(); 2891 } 2892 2893 hci_stack->state = HCI_STATE_SLEEPING; 2894 } 2895 2896 static int hci_power_control_wake(void){ 2897 2898 log_info("hci_power_control_wake"); 2899 2900 // wake on 2901 if (hci_stack->control && hci_stack->control->wake){ 2902 (*hci_stack->control->wake)(); 2903 } 2904 2905 #if 0 2906 // open low-level device 2907 int err = hci_stack->hci_transport->open(hci_stack->config); 2908 if (err){ 2909 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2910 if (hci_stack->control && hci_stack->control->off){ 2911 (*hci_stack->control->off)(); 2912 } 2913 hci_emit_hci_open_failed(); 2914 return err; 2915 } 2916 #endif 2917 2918 return 0; 2919 } 2920 2921 static void hci_power_transition_to_initializing(void){ 2922 // set up state machine 2923 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2924 hci_stack->hci_packet_buffer_reserved = 0; 2925 hci_stack->state = HCI_STATE_INITIALIZING; 2926 hci_stack->substate = HCI_INIT_SEND_RESET; 2927 } 2928 2929 int hci_power_control(HCI_POWER_MODE power_mode){ 2930 2931 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2932 2933 int err = 0; 2934 switch (hci_stack->state){ 2935 2936 case HCI_STATE_OFF: 2937 switch (power_mode){ 2938 case HCI_POWER_ON: 2939 err = hci_power_control_on(); 2940 if (err) { 2941 log_error("hci_power_control_on() error %d", err); 2942 return err; 2943 } 2944 hci_power_transition_to_initializing(); 2945 break; 2946 case HCI_POWER_OFF: 2947 // do nothing 2948 break; 2949 case HCI_POWER_SLEEP: 2950 // do nothing (with SLEEP == OFF) 2951 break; 2952 } 2953 break; 2954 2955 case HCI_STATE_INITIALIZING: 2956 switch (power_mode){ 2957 case HCI_POWER_ON: 2958 // do nothing 2959 break; 2960 case HCI_POWER_OFF: 2961 // no connections yet, just turn it off 2962 hci_power_control_off(); 2963 break; 2964 case HCI_POWER_SLEEP: 2965 // no connections yet, just turn it off 2966 hci_power_control_sleep(); 2967 break; 2968 } 2969 break; 2970 2971 case HCI_STATE_WORKING: 2972 switch (power_mode){ 2973 case HCI_POWER_ON: 2974 // do nothing 2975 break; 2976 case HCI_POWER_OFF: 2977 // see hci_run 2978 hci_stack->state = HCI_STATE_HALTING; 2979 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 2980 break; 2981 case HCI_POWER_SLEEP: 2982 // see hci_run 2983 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2984 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2985 break; 2986 } 2987 break; 2988 2989 case HCI_STATE_HALTING: 2990 switch (power_mode){ 2991 case HCI_POWER_ON: 2992 hci_power_transition_to_initializing(); 2993 break; 2994 case HCI_POWER_OFF: 2995 // do nothing 2996 break; 2997 case HCI_POWER_SLEEP: 2998 // see hci_run 2999 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3000 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3001 break; 3002 } 3003 break; 3004 3005 case HCI_STATE_FALLING_ASLEEP: 3006 switch (power_mode){ 3007 case HCI_POWER_ON: 3008 3009 #ifdef HAVE_PLATFORM_IPHONE_OS 3010 // nothing to do, if H4 supports power management 3011 if (btstack_control_iphone_power_management_enabled()){ 3012 hci_stack->state = HCI_STATE_INITIALIZING; 3013 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3014 break; 3015 } 3016 #endif 3017 hci_power_transition_to_initializing(); 3018 break; 3019 case HCI_POWER_OFF: 3020 // see hci_run 3021 hci_stack->state = HCI_STATE_HALTING; 3022 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3023 break; 3024 case HCI_POWER_SLEEP: 3025 // do nothing 3026 break; 3027 } 3028 break; 3029 3030 case HCI_STATE_SLEEPING: 3031 switch (power_mode){ 3032 case HCI_POWER_ON: 3033 3034 #ifdef HAVE_PLATFORM_IPHONE_OS 3035 // nothing to do, if H4 supports power management 3036 if (btstack_control_iphone_power_management_enabled()){ 3037 hci_stack->state = HCI_STATE_INITIALIZING; 3038 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3039 hci_update_scan_enable(); 3040 break; 3041 } 3042 #endif 3043 err = hci_power_control_wake(); 3044 if (err) return err; 3045 hci_power_transition_to_initializing(); 3046 break; 3047 case HCI_POWER_OFF: 3048 hci_stack->state = HCI_STATE_HALTING; 3049 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3050 break; 3051 case HCI_POWER_SLEEP: 3052 // do nothing 3053 break; 3054 } 3055 break; 3056 } 3057 3058 // create internal event 3059 hci_emit_state(); 3060 3061 // trigger next/first action 3062 hci_run(); 3063 3064 return 0; 3065 } 3066 3067 3068 #ifdef ENABLE_CLASSIC 3069 3070 static void hci_update_scan_enable(void){ 3071 // 2 = page scan, 1 = inq scan 3072 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 3073 hci_run(); 3074 } 3075 3076 void gap_discoverable_control(uint8_t enable){ 3077 if (enable) enable = 1; // normalize argument 3078 3079 if (hci_stack->discoverable == enable){ 3080 hci_emit_discoverable_enabled(hci_stack->discoverable); 3081 return; 3082 } 3083 3084 hci_stack->discoverable = enable; 3085 hci_update_scan_enable(); 3086 } 3087 3088 void gap_connectable_control(uint8_t enable){ 3089 if (enable) enable = 1; // normalize argument 3090 3091 // don't emit event 3092 if (hci_stack->connectable == enable) return; 3093 3094 hci_stack->connectable = enable; 3095 hci_update_scan_enable(); 3096 } 3097 #endif 3098 3099 void gap_local_bd_addr(bd_addr_t address_buffer){ 3100 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3101 } 3102 3103 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3104 static void hci_host_num_completed_packets(void){ 3105 3106 // create packet manually as arrays are not supported and num_commands should not get reduced 3107 hci_reserve_packet_buffer(); 3108 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3109 3110 uint16_t size = 0; 3111 uint16_t num_handles = 0; 3112 packet[size++] = 0x35; 3113 packet[size++] = 0x0c; 3114 size++; // skip param len 3115 size++; // skip num handles 3116 3117 // add { handle, packets } entries 3118 btstack_linked_item_t * it; 3119 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3120 hci_connection_t * connection = (hci_connection_t *) it; 3121 if (connection->num_packets_completed){ 3122 little_endian_store_16(packet, size, connection->con_handle); 3123 size += 2; 3124 little_endian_store_16(packet, size, connection->num_packets_completed); 3125 size += 2; 3126 // 3127 num_handles++; 3128 connection->num_packets_completed = 0; 3129 } 3130 } 3131 3132 packet[2] = size - 3; 3133 packet[3] = num_handles; 3134 3135 hci_stack->host_completed_packets = 0; 3136 3137 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3138 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3139 3140 // release packet buffer for synchronous transport implementations 3141 if (hci_transport_synchronous()){ 3142 hci_release_packet_buffer(); 3143 hci_emit_transport_packet_sent(); 3144 } 3145 } 3146 #endif 3147 3148 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3149 UNUSED(ds); 3150 hci_stack->substate = HCI_HALTING_CLOSE; 3151 // allow packet handlers to defer final shutdown 3152 hci_emit_state(); 3153 hci_run(); 3154 } 3155 3156 static void hci_run(void){ 3157 3158 // log_info("hci_run: entered"); 3159 btstack_linked_item_t * it; 3160 3161 // send continuation fragments first, as they block the prepared packet buffer 3162 if (hci_stack->acl_fragmentation_total_size > 0) { 3163 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3164 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3165 if (connection) { 3166 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3167 hci_send_acl_packet_fragments(connection); 3168 return; 3169 } 3170 } else { 3171 // connection gone -> discard further fragments 3172 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3173 hci_stack->acl_fragmentation_total_size = 0; 3174 hci_stack->acl_fragmentation_pos = 0; 3175 } 3176 } 3177 3178 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3179 // send host num completed packets next as they don't require num_cmd_packets > 0 3180 if (!hci_can_send_comand_packet_transport()) return; 3181 if (hci_stack->host_completed_packets){ 3182 hci_host_num_completed_packets(); 3183 return; 3184 } 3185 #endif 3186 3187 if (!hci_can_send_command_packet_now()) return; 3188 3189 // global/non-connection oriented commands 3190 3191 #ifdef ENABLE_CLASSIC 3192 // decline incoming connections 3193 if (hci_stack->decline_reason){ 3194 uint8_t reason = hci_stack->decline_reason; 3195 hci_stack->decline_reason = 0; 3196 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3197 return; 3198 } 3199 // send scan enable 3200 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 3201 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3202 hci_stack->new_scan_enable_value = 0xff; 3203 return; 3204 } 3205 // start/stop inquiry 3206 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 3207 uint8_t duration = hci_stack->inquiry_state; 3208 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3209 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3210 return; 3211 } 3212 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3213 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3214 hci_send_cmd(&hci_inquiry_cancel); 3215 return; 3216 } 3217 // remote name request 3218 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3219 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3220 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3221 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3222 return; 3223 } 3224 // pairing 3225 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3226 uint8_t state = hci_stack->gap_pairing_state; 3227 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3228 switch (state){ 3229 case GAP_PAIRING_STATE_SEND_PIN: 3230 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); 3231 break; 3232 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3233 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3234 break; 3235 case GAP_PAIRING_STATE_SEND_PASSKEY: 3236 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3237 break; 3238 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3239 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3240 break; 3241 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3242 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3243 break; 3244 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3245 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3246 break; 3247 default: 3248 break; 3249 } 3250 return; 3251 } 3252 #endif 3253 3254 #ifdef ENABLE_BLE 3255 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 3256 if ((hci_stack->state == HCI_STATE_WORKING) 3257 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 3258 3259 #ifdef ENABLE_LE_CENTRAL 3260 // handle le scan 3261 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3262 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3263 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3264 return; 3265 } 3266 if (hci_stack->le_scan_type != 0xff){ 3267 // defaults: active scanning, accept all advertisement packets 3268 int scan_type = hci_stack->le_scan_type; 3269 hci_stack->le_scan_type = 0xff; 3270 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); 3271 return; 3272 } 3273 #endif 3274 #ifdef ENABLE_LE_PERIPHERAL 3275 // le advertisement control 3276 if (hci_stack->le_advertisements_todo){ 3277 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3278 } 3279 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3280 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3281 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3282 return; 3283 } 3284 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3285 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3286 hci_send_cmd(&hci_le_set_advertising_parameters, 3287 hci_stack->le_advertisements_interval_min, 3288 hci_stack->le_advertisements_interval_max, 3289 hci_stack->le_advertisements_type, 3290 hci_stack->le_own_addr_type, 3291 hci_stack->le_advertisements_direct_address_type, 3292 hci_stack->le_advertisements_direct_address, 3293 hci_stack->le_advertisements_channel_map, 3294 hci_stack->le_advertisements_filter_policy); 3295 return; 3296 } 3297 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3298 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3299 uint8_t adv_data_clean[31]; 3300 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3301 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3302 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3303 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3304 return; 3305 } 3306 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3307 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3308 uint8_t scan_data_clean[31]; 3309 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3310 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3311 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3312 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, hci_stack->le_scan_response_data); 3313 return; 3314 } 3315 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3316 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3317 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3318 return; 3319 } 3320 #endif 3321 3322 #ifdef ENABLE_LE_CENTRAL 3323 // 3324 // LE Whitelist Management 3325 // 3326 3327 // check if whitelist needs modification 3328 btstack_linked_list_iterator_t lit; 3329 int modification_pending = 0; 3330 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3331 while (btstack_linked_list_iterator_has_next(&lit)){ 3332 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3333 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3334 modification_pending = 1; 3335 break; 3336 } 3337 } 3338 3339 if (modification_pending){ 3340 // stop connnecting if modification pending 3341 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3342 hci_send_cmd(&hci_le_create_connection_cancel); 3343 return; 3344 } 3345 3346 // add/remove entries 3347 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3348 while (btstack_linked_list_iterator_has_next(&lit)){ 3349 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3350 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3351 entry->state = LE_WHITELIST_ON_CONTROLLER; 3352 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3353 return; 3354 3355 } 3356 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3357 bd_addr_t address; 3358 bd_addr_type_t address_type = entry->address_type; 3359 memcpy(address, entry->address, 6); 3360 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3361 btstack_memory_whitelist_entry_free(entry); 3362 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3363 return; 3364 } 3365 } 3366 } 3367 3368 // start connecting 3369 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3370 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3371 bd_addr_t null_addr; 3372 memset(null_addr, 0, 6); 3373 hci_send_cmd(&hci_le_create_connection, 3374 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3375 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3376 1, // use whitelist 3377 0, // peer address type 3378 null_addr, // peer bd addr 3379 hci_stack->le_own_addr_type, // our addr type: 3380 hci_stack->le_connection_interval_min, // conn interval min 3381 hci_stack->le_connection_interval_max, // conn interval max 3382 hci_stack->le_connection_latency, // conn latency 3383 hci_stack->le_supervision_timeout, // conn latency 3384 hci_stack->le_minimum_ce_length, // min ce length 3385 hci_stack->le_maximum_ce_length // max ce length 3386 ); 3387 return; 3388 } 3389 #endif 3390 } 3391 #endif 3392 3393 // send pending HCI commands 3394 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3395 hci_connection_t * connection = (hci_connection_t *) it; 3396 3397 switch(connection->state){ 3398 case SEND_CREATE_CONNECTION: 3399 switch(connection->address_type){ 3400 #ifdef ENABLE_CLASSIC 3401 case BD_ADDR_TYPE_CLASSIC: 3402 log_info("sending hci_create_connection"); 3403 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3404 break; 3405 #endif 3406 default: 3407 #ifdef ENABLE_BLE 3408 #ifdef ENABLE_LE_CENTRAL 3409 // track outgoing connection 3410 hci_stack->outgoing_addr_type = connection->address_type; 3411 memcpy(hci_stack->outgoing_addr, connection->address, 6); 3412 log_info("sending hci_le_create_connection"); 3413 hci_send_cmd(&hci_le_create_connection, 3414 hci_stack->le_connection_scan_interval, // conn scan interval 3415 hci_stack->le_connection_scan_window, // conn scan windows 3416 0, // don't use whitelist 3417 connection->address_type, // peer address type 3418 connection->address, // peer bd addr 3419 hci_stack->le_own_addr_type, // our addr type: 3420 hci_stack->le_connection_interval_min, // conn interval min 3421 hci_stack->le_connection_interval_max, // conn interval max 3422 hci_stack->le_connection_latency, // conn latency 3423 hci_stack->le_supervision_timeout, // conn latency 3424 hci_stack->le_minimum_ce_length, // min ce length 3425 hci_stack->le_maximum_ce_length // max ce length 3426 ); 3427 connection->state = SENT_CREATE_CONNECTION; 3428 #endif 3429 #endif 3430 break; 3431 } 3432 return; 3433 3434 #ifdef ENABLE_CLASSIC 3435 case RECEIVED_CONNECTION_REQUEST: 3436 connection->role = HCI_ROLE_SLAVE; 3437 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3438 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3439 connection->state = ACCEPTED_CONNECTION_REQUEST; 3440 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3441 } 3442 return; 3443 #endif 3444 3445 #ifdef ENABLE_BLE 3446 #ifdef ENABLE_LE_CENTRAL 3447 case SEND_CANCEL_CONNECTION: 3448 connection->state = SENT_CANCEL_CONNECTION; 3449 hci_send_cmd(&hci_le_create_connection_cancel); 3450 return; 3451 #endif 3452 #endif 3453 case SEND_DISCONNECT: 3454 connection->state = SENT_DISCONNECT; 3455 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3456 return; 3457 3458 default: 3459 break; 3460 } 3461 3462 // no further commands if connection is about to get shut down 3463 if (connection->state == SENT_DISCONNECT) continue; 3464 3465 #ifdef ENABLE_CLASSIC 3466 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3467 log_info("responding to link key request"); 3468 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3469 link_key_t link_key; 3470 link_key_type_t link_key_type; 3471 if ( hci_stack->link_key_db 3472 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3473 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3474 connection->link_key_type = link_key_type; 3475 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3476 } else { 3477 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3478 } 3479 return; 3480 } 3481 3482 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3483 log_info("denying to pin request"); 3484 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3485 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3486 return; 3487 } 3488 3489 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3490 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3491 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3492 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3493 // tweak authentication requirements 3494 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3495 if (connection->bonding_flags & BONDING_DEDICATED){ 3496 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3497 } 3498 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3499 authreq |= 1; 3500 } 3501 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3502 } else { 3503 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3504 } 3505 return; 3506 } 3507 3508 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3509 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3510 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3511 return; 3512 } 3513 3514 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3515 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3516 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3517 return; 3518 } 3519 3520 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3521 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3522 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3523 return; 3524 } 3525 3526 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3527 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3528 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3529 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3530 return; 3531 } 3532 3533 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3534 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3535 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3536 return; 3537 } 3538 3539 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3540 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3541 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3542 return; 3543 } 3544 #endif 3545 3546 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3547 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3548 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3549 return; 3550 } 3551 3552 #ifdef ENABLE_CLASSIC 3553 uint16_t sniff_min_interval; 3554 switch (connection->sniff_min_interval){ 3555 case 0: 3556 break; 3557 case 0xffff: 3558 connection->sniff_min_interval = 0; 3559 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3560 return; 3561 default: 3562 sniff_min_interval = connection->sniff_min_interval; 3563 connection->sniff_min_interval = 0; 3564 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3565 return; 3566 } 3567 #endif 3568 3569 #ifdef ENABLE_BLE 3570 switch (connection->le_con_parameter_update_state){ 3571 // response to L2CAP CON PARAMETER UPDATE REQUEST 3572 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3573 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3574 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3575 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3576 0x0000, 0xffff); 3577 return; 3578 case CON_PARAMETER_UPDATE_REPLY: 3579 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3580 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3581 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3582 0x0000, 0xffff); 3583 return; 3584 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3585 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3586 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3587 return; 3588 default: 3589 break; 3590 } 3591 if (connection->le_phy_update_all_phys != 0xff){ 3592 uint8_t all_phys = connection->le_phy_update_all_phys; 3593 connection->le_phy_update_all_phys = 0xff; 3594 hci_send_cmd(&hci_le_set_phy, connection->con_handle, all_phys, connection->le_phy_update_tx_phys, connection->le_phy_update_rx_phys, connection->le_phy_update_phy_options); 3595 return; 3596 } 3597 #endif 3598 } 3599 3600 hci_connection_t * connection; 3601 switch (hci_stack->state){ 3602 case HCI_STATE_INITIALIZING: 3603 hci_initializing_run(); 3604 break; 3605 3606 case HCI_STATE_HALTING: 3607 3608 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 3609 switch (hci_stack->substate){ 3610 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 3611 case HCI_HALTING_DISCONNECT_ALL_TIMER: 3612 3613 #ifdef ENABLE_BLE 3614 #ifdef ENABLE_LE_CENTRAL 3615 // free whitelist entries 3616 { 3617 btstack_linked_list_iterator_t lit; 3618 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3619 while (btstack_linked_list_iterator_has_next(&lit)){ 3620 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3621 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3622 btstack_memory_whitelist_entry_free(entry); 3623 } 3624 } 3625 #endif 3626 #endif 3627 // close all open connections 3628 connection = (hci_connection_t *) hci_stack->connections; 3629 if (connection){ 3630 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3631 if (!hci_can_send_command_packet_now()) return; 3632 3633 // check state 3634 if (connection->state == SENT_DISCONNECT) return; 3635 connection->state = SENT_DISCONNECT; 3636 3637 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3638 3639 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3640 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3641 3642 // ... which would be ignored anyway as we shutdown (free) the connection now 3643 hci_shutdown_connection(connection); 3644 3645 // finally, send the disconnect command 3646 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3647 return; 3648 } 3649 3650 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 3651 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 3652 log_info("HCI_STATE_HALTING: wait 50 ms"); 3653 hci_stack->substate = HCI_HALTING_W4_TIMER; 3654 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 3655 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3656 btstack_run_loop_add_timer(&hci_stack->timeout); 3657 break; 3658 } 3659 3660 /* explicit fall-through */ 3661 3662 case HCI_HALTING_CLOSE: 3663 log_info("HCI_STATE_HALTING, calling off"); 3664 3665 // switch mode 3666 hci_power_control_off(); 3667 3668 log_info("HCI_STATE_HALTING, emitting state"); 3669 hci_emit_state(); 3670 log_info("HCI_STATE_HALTING, done"); 3671 break; 3672 3673 case HCI_HALTING_W4_TIMER: 3674 // keep waiting 3675 3676 break; 3677 default: 3678 break; 3679 } 3680 3681 break; 3682 3683 case HCI_STATE_FALLING_ASLEEP: 3684 switch(hci_stack->substate) { 3685 case HCI_FALLING_ASLEEP_DISCONNECT: 3686 log_info("HCI_STATE_FALLING_ASLEEP"); 3687 // close all open connections 3688 connection = (hci_connection_t *) hci_stack->connections; 3689 3690 #ifdef HAVE_PLATFORM_IPHONE_OS 3691 // don't close connections, if H4 supports power management 3692 if (btstack_control_iphone_power_management_enabled()){ 3693 connection = NULL; 3694 } 3695 #endif 3696 if (connection){ 3697 3698 // send disconnect 3699 if (!hci_can_send_command_packet_now()) return; 3700 3701 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3702 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3703 3704 // send disconnected event right away - causes higher layer connections to get closed, too. 3705 hci_shutdown_connection(connection); 3706 return; 3707 } 3708 3709 if (hci_classic_supported()){ 3710 // disable page and inquiry scan 3711 if (!hci_can_send_command_packet_now()) return; 3712 3713 log_info("HCI_STATE_HALTING, disabling inq scans"); 3714 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3715 3716 // continue in next sub state 3717 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3718 break; 3719 } 3720 // no break - fall through for ble-only chips 3721 3722 case HCI_FALLING_ASLEEP_COMPLETE: 3723 log_info("HCI_STATE_HALTING, calling sleep"); 3724 #ifdef HAVE_PLATFORM_IPHONE_OS 3725 // don't actually go to sleep, if H4 supports power management 3726 if (btstack_control_iphone_power_management_enabled()){ 3727 // SLEEP MODE reached 3728 hci_stack->state = HCI_STATE_SLEEPING; 3729 hci_emit_state(); 3730 break; 3731 } 3732 #endif 3733 // switch mode 3734 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3735 hci_emit_state(); 3736 break; 3737 3738 default: 3739 break; 3740 } 3741 break; 3742 3743 default: 3744 break; 3745 } 3746 } 3747 3748 int hci_send_cmd_packet(uint8_t *packet, int size){ 3749 // house-keeping 3750 3751 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3752 hci_stack->loopback_mode = packet[3]; 3753 } 3754 3755 #ifdef ENABLE_CLASSIC 3756 bd_addr_t addr; 3757 hci_connection_t * conn; 3758 3759 // create_connection? 3760 if (IS_COMMAND(packet, hci_create_connection)){ 3761 reverse_bd_addr(&packet[3], addr); 3762 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3763 3764 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3765 if (!conn){ 3766 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3767 if (!conn){ 3768 // notify client that alloc failed 3769 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3770 return -1; // packet not sent to controller 3771 } 3772 conn->state = SEND_CREATE_CONNECTION; 3773 } 3774 log_info("conn state %u", conn->state); 3775 switch (conn->state){ 3776 // if connection active exists 3777 case OPEN: 3778 // and OPEN, emit connection complete command 3779 hci_emit_connection_complete(addr, conn->con_handle, 0); 3780 return -1; // packet not sent to controller 3781 case SEND_CREATE_CONNECTION: 3782 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 3783 break; 3784 default: 3785 // otherwise, just ignore as it is already in the open process 3786 return -1; // packet not sent to controller 3787 } 3788 conn->state = SENT_CREATE_CONNECTION; 3789 3790 // track outgoing connection 3791 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_CLASSIC; 3792 memcpy(hci_stack->outgoing_addr, addr, 6); 3793 } 3794 3795 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3796 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3797 } 3798 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3799 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3800 } 3801 3802 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3803 if (hci_stack->link_key_db){ 3804 reverse_bd_addr(&packet[3], addr); 3805 hci_stack->link_key_db->delete_link_key(addr); 3806 } 3807 } 3808 3809 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3810 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3811 reverse_bd_addr(&packet[3], addr); 3812 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3813 if (conn){ 3814 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3815 } 3816 } 3817 3818 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3819 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3820 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3821 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3822 reverse_bd_addr(&packet[3], addr); 3823 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3824 if (conn){ 3825 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3826 } 3827 } 3828 3829 #ifdef ENABLE_SCO_OVER_HCI 3830 // setup_synchronous_connection? Voice setting at offset 22 3831 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3832 // TODO: compare to current setting if sco connection already active 3833 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3834 } 3835 // accept_synchronus_connection? Voice setting at offset 18 3836 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3837 // TODO: compare to current setting if sco connection already active 3838 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3839 } 3840 #endif 3841 #endif 3842 3843 #ifdef ENABLE_BLE 3844 #ifdef ENABLE_LE_PERIPHERAL 3845 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3846 hci_stack->le_random_address_set = 1; 3847 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3848 } 3849 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3850 hci_stack->le_advertisements_active = packet[3]; 3851 } 3852 #endif 3853 #ifdef ENABLE_LE_CENTRAL 3854 if (IS_COMMAND(packet, hci_le_create_connection)){ 3855 // white list used? 3856 uint8_t initiator_filter_policy = packet[7]; 3857 switch (initiator_filter_policy){ 3858 case 0: 3859 // whitelist not used 3860 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3861 break; 3862 case 1: 3863 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3864 break; 3865 default: 3866 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3867 break; 3868 } 3869 } 3870 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3871 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3872 } 3873 #endif 3874 #endif 3875 3876 hci_stack->num_cmd_packets--; 3877 3878 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3879 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3880 } 3881 3882 // disconnect because of security block 3883 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3884 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3885 if (!connection) return; 3886 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3887 } 3888 3889 3890 // Configure Secure Simple Pairing 3891 3892 #ifdef ENABLE_CLASSIC 3893 3894 // enable will enable SSP during init 3895 void gap_ssp_set_enable(int enable){ 3896 hci_stack->ssp_enable = enable; 3897 } 3898 3899 static int hci_local_ssp_activated(void){ 3900 return gap_ssp_supported() && hci_stack->ssp_enable; 3901 } 3902 3903 // if set, BTstack will respond to io capability request using authentication requirement 3904 void gap_ssp_set_io_capability(int io_capability){ 3905 hci_stack->ssp_io_capability = io_capability; 3906 } 3907 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3908 hci_stack->ssp_authentication_requirement = authentication_requirement; 3909 } 3910 3911 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3912 void gap_ssp_set_auto_accept(int auto_accept){ 3913 hci_stack->ssp_auto_accept = auto_accept; 3914 } 3915 #endif 3916 3917 // va_list part of hci_send_cmd 3918 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3919 if (!hci_can_send_command_packet_now()){ 3920 log_error("hci_send_cmd called but cannot send packet now"); 3921 return 0; 3922 } 3923 3924 // for HCI INITIALIZATION 3925 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3926 hci_stack->last_cmd_opcode = cmd->opcode; 3927 3928 hci_reserve_packet_buffer(); 3929 uint8_t * packet = hci_stack->hci_packet_buffer; 3930 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3931 int err = hci_send_cmd_packet(packet, size); 3932 3933 // release packet buffer for synchronous transport implementations 3934 if (hci_transport_synchronous()){ 3935 hci_release_packet_buffer(); 3936 hci_emit_transport_packet_sent(); 3937 } 3938 3939 return err; 3940 } 3941 3942 /** 3943 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3944 */ 3945 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3946 va_list argptr; 3947 va_start(argptr, cmd); 3948 int res = hci_send_cmd_va_arg(cmd, argptr); 3949 va_end(argptr); 3950 return res; 3951 } 3952 3953 // Create various non-HCI events. 3954 // TODO: generalize, use table similar to hci_create_command 3955 3956 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3957 // dump packet 3958 if (dump) { 3959 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3960 } 3961 3962 // dispatch to all event handlers 3963 btstack_linked_list_iterator_t it; 3964 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3965 while (btstack_linked_list_iterator_has_next(&it)){ 3966 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3967 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3968 } 3969 } 3970 3971 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3972 if (!hci_stack->acl_packet_handler) return; 3973 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3974 } 3975 3976 #ifdef ENABLE_CLASSIC 3977 static void hci_notify_if_sco_can_send_now(void){ 3978 // notify SCO sender if waiting 3979 if (!hci_stack->sco_waiting_for_can_send_now) return; 3980 if (hci_can_send_sco_packet_now()){ 3981 hci_stack->sco_waiting_for_can_send_now = 0; 3982 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3983 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3984 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3985 } 3986 } 3987 3988 // parsing end emitting has been merged to reduce code size 3989 static void gap_inquiry_explode(uint8_t * packet){ 3990 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 3991 3992 uint8_t * eir_data; 3993 ad_context_t context; 3994 const uint8_t * name; 3995 uint8_t name_len; 3996 3997 int event_type = hci_event_packet_get_type(packet); 3998 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 3999 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4000 4001 // event[1] is set at the end 4002 int i; 4003 for (i=0; i<num_responses;i++){ 4004 memset(event, 0, sizeof(event)); 4005 event[0] = GAP_EVENT_INQUIRY_RESULT; 4006 uint8_t event_size = 18; // if name is not set by EIR 4007 4008 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 4009 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 4010 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 4011 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 4012 4013 switch (event_type){ 4014 case HCI_EVENT_INQUIRY_RESULT: 4015 // 14,15,16,17 = 0, size 18 4016 break; 4017 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4018 event[14] = 1; 4019 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 4020 // 16,17 = 0, size 18 4021 break; 4022 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4023 event[14] = 1; 4024 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 4025 // for EIR packets, there is only one reponse in it 4026 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4027 name = NULL; 4028 // EIR data is 240 bytes in EIR event 4029 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4030 uint8_t data_type = ad_iterator_get_data_type(&context); 4031 uint8_t data_size = ad_iterator_get_data_len(&context); 4032 const uint8_t * data = ad_iterator_get_data(&context); 4033 // Prefer Complete Local Name over Shortend Local Name 4034 switch (data_type){ 4035 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4036 if (name) continue; 4037 /* explicit fall-through */ 4038 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4039 name = data; 4040 name_len = data_size; 4041 break; 4042 default: 4043 break; 4044 } 4045 } 4046 if (name){ 4047 event[16] = 1; 4048 // truncate name if needed 4049 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4050 event[17] = len; 4051 memcpy(&event[18], name, len); 4052 event_size += len; 4053 } 4054 break; 4055 } 4056 event[1] = event_size - 2; 4057 hci_emit_event(event, event_size, 1); 4058 } 4059 } 4060 #endif 4061 4062 void hci_emit_state(void){ 4063 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4064 uint8_t event[3]; 4065 event[0] = BTSTACK_EVENT_STATE; 4066 event[1] = sizeof(event) - 2; 4067 event[2] = hci_stack->state; 4068 hci_emit_event(event, sizeof(event), 1); 4069 } 4070 4071 #ifdef ENABLE_CLASSIC 4072 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4073 uint8_t event[13]; 4074 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4075 event[1] = sizeof(event) - 2; 4076 event[2] = status; 4077 little_endian_store_16(event, 3, con_handle); 4078 reverse_bd_addr(address, &event[5]); 4079 event[11] = 1; // ACL connection 4080 event[12] = 0; // encryption disabled 4081 hci_emit_event(event, sizeof(event), 1); 4082 } 4083 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4084 if (disable_l2cap_timeouts) return; 4085 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4086 uint8_t event[4]; 4087 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4088 event[1] = sizeof(event) - 2; 4089 little_endian_store_16(event, 2, conn->con_handle); 4090 hci_emit_event(event, sizeof(event), 1); 4091 } 4092 #endif 4093 4094 #ifdef ENABLE_BLE 4095 #ifdef ENABLE_LE_CENTRAL 4096 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4097 uint8_t event[21]; 4098 event[0] = HCI_EVENT_LE_META; 4099 event[1] = sizeof(event) - 2; 4100 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4101 event[3] = status; 4102 little_endian_store_16(event, 4, con_handle); 4103 event[6] = 0; // TODO: role 4104 event[7] = address_type; 4105 reverse_bd_addr(address, &event[8]); 4106 little_endian_store_16(event, 14, 0); // interval 4107 little_endian_store_16(event, 16, 0); // latency 4108 little_endian_store_16(event, 18, 0); // supervision timeout 4109 event[20] = 0; // master clock accuracy 4110 hci_emit_event(event, sizeof(event), 1); 4111 } 4112 #endif 4113 #endif 4114 4115 static void hci_emit_transport_packet_sent(void){ 4116 // notify upper stack that it might be possible to send again 4117 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4118 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4119 } 4120 4121 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4122 uint8_t event[6]; 4123 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4124 event[1] = sizeof(event) - 2; 4125 event[2] = 0; // status = OK 4126 little_endian_store_16(event, 3, con_handle); 4127 event[5] = reason; 4128 hci_emit_event(event, sizeof(event), 1); 4129 } 4130 4131 static void hci_emit_nr_connections_changed(void){ 4132 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4133 uint8_t event[3]; 4134 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4135 event[1] = sizeof(event) - 2; 4136 event[2] = nr_hci_connections(); 4137 hci_emit_event(event, sizeof(event), 1); 4138 } 4139 4140 static void hci_emit_hci_open_failed(void){ 4141 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4142 uint8_t event[2]; 4143 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4144 event[1] = sizeof(event) - 2; 4145 hci_emit_event(event, sizeof(event), 1); 4146 } 4147 4148 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4149 log_info("hci_emit_dedicated_bonding_result %u ", status); 4150 uint8_t event[9]; 4151 int pos = 0; 4152 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4153 event[pos++] = sizeof(event) - 2; 4154 event[pos++] = status; 4155 reverse_bd_addr(address, &event[pos]); 4156 hci_emit_event(event, sizeof(event), 1); 4157 } 4158 4159 4160 #ifdef ENABLE_CLASSIC 4161 4162 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4163 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4164 uint8_t event[5]; 4165 int pos = 0; 4166 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4167 event[pos++] = sizeof(event) - 2; 4168 little_endian_store_16(event, 2, con_handle); 4169 pos += 2; 4170 event[pos++] = level; 4171 hci_emit_event(event, sizeof(event), 1); 4172 } 4173 4174 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4175 if (!connection) return LEVEL_0; 4176 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4177 return gap_security_level_for_link_key_type(connection->link_key_type); 4178 } 4179 4180 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4181 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4182 uint8_t event[3]; 4183 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4184 event[1] = sizeof(event) - 2; 4185 event[2] = enabled; 4186 hci_emit_event(event, sizeof(event), 1); 4187 } 4188 4189 #ifdef ENABLE_CLASSIC 4190 // query if remote side supports eSCO 4191 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4192 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4193 if (!connection) return 0; 4194 return connection->remote_supported_feature_eSCO; 4195 } 4196 4197 // query if remote side supports SSP 4198 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4199 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4200 if (!connection) return 0; 4201 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4202 } 4203 4204 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4205 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4206 } 4207 #endif 4208 4209 // GAP API 4210 /** 4211 * @bbrief enable/disable bonding. default is enabled 4212 * @praram enabled 4213 */ 4214 void gap_set_bondable_mode(int enable){ 4215 hci_stack->bondable = enable ? 1 : 0; 4216 } 4217 /** 4218 * @brief Get bondable mode. 4219 * @return 1 if bondable 4220 */ 4221 int gap_get_bondable_mode(void){ 4222 return hci_stack->bondable; 4223 } 4224 4225 /** 4226 * @brief map link keys to security levels 4227 */ 4228 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4229 switch (link_key_type){ 4230 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4231 return LEVEL_4; 4232 case COMBINATION_KEY: 4233 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4234 return LEVEL_3; 4235 default: 4236 return LEVEL_2; 4237 } 4238 } 4239 4240 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4241 log_info("gap_mitm_protection_required_for_security_level %u", level); 4242 return level > LEVEL_2; 4243 } 4244 4245 /** 4246 * @brief get current security level 4247 */ 4248 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4249 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4250 if (!connection) return LEVEL_0; 4251 return gap_security_level_for_connection(connection); 4252 } 4253 4254 /** 4255 * @brief request connection to device to 4256 * @result GAP_AUTHENTICATION_RESULT 4257 */ 4258 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4259 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4260 if (!connection){ 4261 hci_emit_security_level(con_handle, LEVEL_0); 4262 return; 4263 } 4264 gap_security_level_t current_level = gap_security_level(con_handle); 4265 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4266 requested_level, connection->requested_security_level, current_level); 4267 4268 // assumption: earlier requested security higher than current level => security request is active 4269 if (current_level < connection->requested_security_level){ 4270 if (connection->requested_security_level < requested_level){ 4271 // increase requested level as new level is higher 4272 4273 // TODO: handle re-authentication when done 4274 4275 connection->requested_security_level = requested_level; 4276 } 4277 return; 4278 } 4279 4280 // no request active, notify if security sufficient 4281 if (requested_level <= current_level){ 4282 hci_emit_security_level(con_handle, current_level); 4283 return; 4284 } 4285 4286 // start pairing to increase security level 4287 connection->requested_security_level = requested_level; 4288 4289 #if 0 4290 // sending encryption request without a link key results in an error. 4291 // TODO: figure out how to use it properly 4292 4293 // would enabling ecnryption suffice (>= LEVEL_2)? 4294 if (hci_stack->link_key_db){ 4295 link_key_type_t link_key_type; 4296 link_key_t link_key; 4297 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4298 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4299 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4300 return; 4301 } 4302 } 4303 } 4304 #endif 4305 4306 // start to authenticate connection 4307 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4308 hci_run(); 4309 } 4310 4311 /** 4312 * @brief start dedicated bonding with device. disconnect after bonding 4313 * @param device 4314 * @param request MITM protection 4315 * @result GAP_DEDICATED_BONDING_COMPLETE 4316 */ 4317 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4318 4319 // create connection state machine 4320 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 4321 4322 if (!connection){ 4323 return BTSTACK_MEMORY_ALLOC_FAILED; 4324 } 4325 4326 // delete linkn key 4327 gap_drop_link_key_for_bd_addr(device); 4328 4329 // configure LEVEL_2/3, dedicated bonding 4330 connection->state = SEND_CREATE_CONNECTION; 4331 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4332 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4333 connection->bonding_flags = BONDING_DEDICATED; 4334 4335 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4336 4337 // handle: connnection failure (connection complete != ok) 4338 // handle: authentication failure 4339 // handle: disconnect on done 4340 4341 hci_run(); 4342 4343 return 0; 4344 } 4345 #endif 4346 4347 void gap_set_local_name(const char * local_name){ 4348 hci_stack->local_name = local_name; 4349 } 4350 4351 4352 #ifdef ENABLE_BLE 4353 4354 #ifdef ENABLE_LE_CENTRAL 4355 void gap_start_scan(void){ 4356 hci_stack->le_scanning_enabled = 1; 4357 hci_run(); 4358 } 4359 4360 void gap_stop_scan(void){ 4361 hci_stack->le_scanning_enabled = 0; 4362 hci_run(); 4363 } 4364 4365 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4366 hci_stack->le_scan_type = scan_type; 4367 hci_stack->le_scan_interval = scan_interval; 4368 hci_stack->le_scan_window = scan_window; 4369 hci_run(); 4370 } 4371 4372 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4373 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4374 if (!conn){ 4375 log_info("gap_connect: no connection exists yet, creating context"); 4376 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4377 if (!conn){ 4378 // notify client that alloc failed 4379 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4380 log_info("gap_connect: failed to alloc hci_connection_t"); 4381 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4382 } 4383 conn->state = SEND_CREATE_CONNECTION; 4384 log_info("gap_connect: send create connection next"); 4385 hci_run(); 4386 return 0; 4387 } 4388 4389 if (!hci_is_le_connection(conn) || 4390 conn->state == SEND_CREATE_CONNECTION || 4391 conn->state == SENT_CREATE_CONNECTION) { 4392 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4393 log_error("gap_connect: classic connection or connect is already being created"); 4394 return GATT_CLIENT_IN_WRONG_STATE; 4395 } 4396 4397 log_info("gap_connect: context exists with state %u", conn->state); 4398 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4399 hci_run(); 4400 return 0; 4401 } 4402 4403 // @assumption: only a single outgoing LE Connection exists 4404 static hci_connection_t * gap_get_outgoing_connection(void){ 4405 btstack_linked_item_t *it; 4406 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4407 hci_connection_t * conn = (hci_connection_t *) it; 4408 if (!hci_is_le_connection(conn)) continue; 4409 switch (conn->state){ 4410 case SEND_CREATE_CONNECTION: 4411 case SENT_CREATE_CONNECTION: 4412 case SENT_CANCEL_CONNECTION: 4413 return conn; 4414 default: 4415 break; 4416 }; 4417 } 4418 return NULL; 4419 } 4420 4421 uint8_t gap_connect_cancel(void){ 4422 hci_connection_t * conn = gap_get_outgoing_connection(); 4423 if (!conn) return 0; 4424 switch (conn->state){ 4425 case SEND_CREATE_CONNECTION: 4426 // skip sending create connection and emit event instead 4427 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4428 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4429 btstack_memory_hci_connection_free( conn ); 4430 break; 4431 case SENT_CREATE_CONNECTION: 4432 // request to send cancel connection 4433 conn->state = SEND_CANCEL_CONNECTION; 4434 hci_run(); 4435 break; 4436 default: 4437 break; 4438 } 4439 return 0; 4440 } 4441 #endif 4442 4443 #ifdef ENABLE_LE_CENTRAL 4444 /** 4445 * @brief Set connection parameters for outgoing connections 4446 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4447 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4448 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4449 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4450 * @param conn_latency, default: 4 4451 * @param supervision_timeout (unit: 10ms), default: 720 ms 4452 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4453 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4454 */ 4455 4456 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4457 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4458 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4459 hci_stack->le_connection_scan_interval = conn_scan_interval; 4460 hci_stack->le_connection_scan_window = conn_scan_window; 4461 hci_stack->le_connection_interval_min = conn_interval_min; 4462 hci_stack->le_connection_interval_max = conn_interval_max; 4463 hci_stack->le_connection_latency = conn_latency; 4464 hci_stack->le_supervision_timeout = supervision_timeout; 4465 hci_stack->le_minimum_ce_length = min_ce_length; 4466 hci_stack->le_maximum_ce_length = max_ce_length; 4467 } 4468 #endif 4469 4470 /** 4471 * @brief Updates the connection parameters for a given LE connection 4472 * @param handle 4473 * @param conn_interval_min (unit: 1.25ms) 4474 * @param conn_interval_max (unit: 1.25ms) 4475 * @param conn_latency 4476 * @param supervision_timeout (unit: 10ms) 4477 * @returns 0 if ok 4478 */ 4479 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4480 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4481 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4482 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4483 connection->le_conn_interval_min = conn_interval_min; 4484 connection->le_conn_interval_max = conn_interval_max; 4485 connection->le_conn_latency = conn_latency; 4486 connection->le_supervision_timeout = supervision_timeout; 4487 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4488 hci_run(); 4489 return 0; 4490 } 4491 4492 /** 4493 * @brief Request an update of the connection parameter for a given LE connection 4494 * @param handle 4495 * @param conn_interval_min (unit: 1.25ms) 4496 * @param conn_interval_max (unit: 1.25ms) 4497 * @param conn_latency 4498 * @param supervision_timeout (unit: 10ms) 4499 * @returns 0 if ok 4500 */ 4501 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4502 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4503 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4504 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4505 connection->le_conn_interval_min = conn_interval_min; 4506 connection->le_conn_interval_max = conn_interval_max; 4507 connection->le_conn_latency = conn_latency; 4508 connection->le_supervision_timeout = supervision_timeout; 4509 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4510 hci_run(); 4511 return 0; 4512 } 4513 4514 #ifdef ENABLE_LE_PERIPHERAL 4515 4516 static void gap_advertisments_changed(void){ 4517 // disable advertisements before updating adv, scan data, or adv params 4518 if (hci_stack->le_advertisements_active){ 4519 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4520 } 4521 hci_run(); 4522 } 4523 4524 /** 4525 * @brief Set Advertisement Data 4526 * @param advertising_data_length 4527 * @param advertising_data (max 31 octets) 4528 * @note data is not copied, pointer has to stay valid 4529 */ 4530 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4531 hci_stack->le_advertisements_data_len = advertising_data_length; 4532 hci_stack->le_advertisements_data = advertising_data; 4533 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4534 gap_advertisments_changed(); 4535 } 4536 4537 /** 4538 * @brief Set Scan Response Data 4539 * @param advertising_data_length 4540 * @param advertising_data (max 31 octets) 4541 * @note data is not copied, pointer has to stay valid 4542 */ 4543 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4544 hci_stack->le_scan_response_data_len = scan_response_data_length; 4545 hci_stack->le_scan_response_data = scan_response_data; 4546 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4547 gap_advertisments_changed(); 4548 } 4549 4550 /** 4551 * @brief Set Advertisement Parameters 4552 * @param adv_int_min 4553 * @param adv_int_max 4554 * @param adv_type 4555 * @param direct_address_type 4556 * @param direct_address 4557 * @param channel_map 4558 * @param filter_policy 4559 * 4560 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4561 */ 4562 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4563 uint8_t direct_address_typ, bd_addr_t direct_address, 4564 uint8_t channel_map, uint8_t filter_policy) { 4565 4566 hci_stack->le_advertisements_interval_min = adv_int_min; 4567 hci_stack->le_advertisements_interval_max = adv_int_max; 4568 hci_stack->le_advertisements_type = adv_type; 4569 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4570 hci_stack->le_advertisements_channel_map = channel_map; 4571 hci_stack->le_advertisements_filter_policy = filter_policy; 4572 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4573 4574 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4575 gap_advertisments_changed(); 4576 } 4577 4578 /** 4579 * @brief Enable/Disable Advertisements 4580 * @param enabled 4581 */ 4582 void gap_advertisements_enable(int enabled){ 4583 hci_stack->le_advertisements_enabled = enabled; 4584 if (enabled && !hci_stack->le_advertisements_active){ 4585 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4586 } 4587 if (!enabled && hci_stack->le_advertisements_active){ 4588 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4589 } 4590 hci_run(); 4591 } 4592 4593 #endif 4594 4595 void hci_le_set_own_address_type(uint8_t own_address_type){ 4596 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4597 if (own_address_type == hci_stack->le_own_addr_type) return; 4598 hci_stack->le_own_addr_type = own_address_type; 4599 4600 #ifdef ENABLE_LE_PERIPHERAL 4601 // update advertisement parameters, too 4602 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4603 gap_advertisments_changed(); 4604 #endif 4605 #ifdef ENABLE_LE_CENTRAL 4606 // note: we don't update scan parameters or modify ongoing connection attempts 4607 #endif 4608 } 4609 4610 #endif 4611 4612 uint8_t gap_disconnect(hci_con_handle_t handle){ 4613 hci_connection_t * conn = hci_connection_for_handle(handle); 4614 if (!conn){ 4615 hci_emit_disconnection_complete(handle, 0); 4616 return 0; 4617 } 4618 // ignore if already disconnected 4619 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4620 return 0; 4621 } 4622 conn->state = SEND_DISCONNECT; 4623 hci_run(); 4624 return 0; 4625 } 4626 4627 /** 4628 * @brief Get connection type 4629 * @param con_handle 4630 * @result connection_type 4631 */ 4632 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4633 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4634 if (!conn) return GAP_CONNECTION_INVALID; 4635 switch (conn->address_type){ 4636 case BD_ADDR_TYPE_LE_PUBLIC: 4637 case BD_ADDR_TYPE_LE_RANDOM: 4638 return GAP_CONNECTION_LE; 4639 case BD_ADDR_TYPE_SCO: 4640 return GAP_CONNECTION_SCO; 4641 case BD_ADDR_TYPE_CLASSIC: 4642 return GAP_CONNECTION_ACL; 4643 default: 4644 return GAP_CONNECTION_INVALID; 4645 } 4646 } 4647 4648 #ifdef ENABLE_BLE 4649 4650 uint8_t gap_le_set_phy(hci_con_handle_t connection_handle, uint8_t all_phys, uint8_t tx_phys, uint8_t rx_phys, uint8_t phy_options){ 4651 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4652 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4653 4654 conn->le_phy_update_all_phys = all_phys; 4655 conn->le_phy_update_tx_phys = tx_phys; 4656 conn->le_phy_update_rx_phys = rx_phys; 4657 conn->le_phy_update_phy_options = phy_options; 4658 4659 hci_run(); 4660 4661 return 0; 4662 } 4663 4664 #ifdef ENABLE_LE_CENTRAL 4665 /** 4666 * @brief Auto Connection Establishment - Start Connecting to device 4667 * @param address_typ 4668 * @param address 4669 * @returns 0 if ok 4670 */ 4671 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4672 // check capacity 4673 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4674 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4675 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4676 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4677 entry->address_type = address_type; 4678 memcpy(entry->address, address, 6); 4679 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4680 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4681 hci_run(); 4682 return 0; 4683 } 4684 4685 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4686 btstack_linked_list_iterator_t it; 4687 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4688 while (btstack_linked_list_iterator_has_next(&it)){ 4689 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4690 if (entry->address_type != address_type) continue; 4691 if (memcmp(entry->address, address, 6) != 0) continue; 4692 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4693 // remove from controller if already present 4694 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4695 continue; 4696 } 4697 // direclty remove entry from whitelist 4698 btstack_linked_list_iterator_remove(&it); 4699 btstack_memory_whitelist_entry_free(entry); 4700 } 4701 } 4702 4703 /** 4704 * @brief Auto Connection Establishment - Stop Connecting to device 4705 * @param address_typ 4706 * @param address 4707 * @returns 0 if ok 4708 */ 4709 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4710 hci_remove_from_whitelist(address_type, address); 4711 hci_run(); 4712 return 0; 4713 } 4714 4715 /** 4716 * @brief Auto Connection Establishment - Stop everything 4717 * @note Convenience function to stop all active auto connection attempts 4718 */ 4719 void gap_auto_connection_stop_all(void){ 4720 btstack_linked_list_iterator_t it; 4721 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4722 while (btstack_linked_list_iterator_has_next(&it)){ 4723 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4724 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4725 // remove from controller if already present 4726 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4727 continue; 4728 } 4729 // directly remove entry from whitelist 4730 btstack_linked_list_iterator_remove(&it); 4731 btstack_memory_whitelist_entry_free(entry); 4732 } 4733 hci_run(); 4734 } 4735 4736 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 4737 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4738 if (!conn) return 0; 4739 return conn->le_connection_interval; 4740 } 4741 #endif 4742 #endif 4743 4744 #ifdef ENABLE_CLASSIC 4745 /** 4746 * @brief Set Extended Inquiry Response data 4747 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4748 * @note has to be done before stack starts up 4749 */ 4750 void gap_set_extended_inquiry_response(const uint8_t * data){ 4751 hci_stack->eir_data = data; 4752 } 4753 4754 /** 4755 * @brief Start GAP Classic Inquiry 4756 * @param duration in 1.28s units 4757 * @return 0 if ok 4758 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4759 */ 4760 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4761 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 4762 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4763 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4764 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4765 } 4766 hci_stack->inquiry_state = duration_in_1280ms_units; 4767 hci_run(); 4768 return 0; 4769 } 4770 4771 /** 4772 * @brief Stop GAP Classic Inquiry 4773 * @returns 0 if ok 4774 */ 4775 int gap_inquiry_stop(void){ 4776 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4777 // emit inquiry complete event, before it even started 4778 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4779 hci_emit_event(event, sizeof(event), 1); 4780 return 0; 4781 } 4782 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4783 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4784 hci_run(); 4785 return 0; 4786 } 4787 4788 4789 /** 4790 * @brief Remote Name Request 4791 * @param addr 4792 * @param page_scan_repetition_mode 4793 * @param clock_offset only used when bit 15 is set 4794 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4795 */ 4796 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4797 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4798 memcpy(hci_stack->remote_name_addr, addr, 6); 4799 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4800 hci_stack->remote_name_clock_offset = clock_offset; 4801 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4802 hci_run(); 4803 return 0; 4804 } 4805 4806 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4807 hci_stack->gap_pairing_state = state; 4808 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4809 hci_run(); 4810 return 0; 4811 } 4812 4813 /** 4814 * @brief Legacy Pairing Pin Code Response 4815 * @param addr 4816 * @param pin 4817 * @return 0 if ok 4818 */ 4819 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4820 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4821 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 4822 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4823 } 4824 4825 /** 4826 * @brief Abort Legacy Pairing 4827 * @param addr 4828 * @param pin 4829 * @return 0 if ok 4830 */ 4831 int gap_pin_code_negative(bd_addr_t addr){ 4832 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4833 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4834 } 4835 4836 /** 4837 * @brief SSP Passkey Response 4838 * @param addr 4839 * @param passkey 4840 * @return 0 if ok 4841 */ 4842 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4843 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4844 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 4845 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4846 } 4847 4848 /** 4849 * @brief Abort SSP Passkey Entry/Pairing 4850 * @param addr 4851 * @param pin 4852 * @return 0 if ok 4853 */ 4854 int gap_ssp_passkey_negative(bd_addr_t addr){ 4855 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4856 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4857 } 4858 4859 /** 4860 * @brief Accept SSP Numeric Comparison 4861 * @param addr 4862 * @param passkey 4863 * @return 0 if ok 4864 */ 4865 int gap_ssp_confirmation_response(bd_addr_t addr){ 4866 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4867 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4868 } 4869 4870 /** 4871 * @brief Abort SSP Numeric Comparison/Pairing 4872 * @param addr 4873 * @param pin 4874 * @return 0 if ok 4875 */ 4876 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4877 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4878 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4879 } 4880 4881 /** 4882 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4883 * @param inquiry_mode see bluetooth_defines.h 4884 */ 4885 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4886 hci_stack->inquiry_mode = mode; 4887 } 4888 4889 /** 4890 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4891 */ 4892 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4893 hci_stack->sco_voice_setting = voice_setting; 4894 } 4895 4896 /** 4897 * @brief Get SCO Voice Setting 4898 * @return current voice setting 4899 */ 4900 uint16_t hci_get_sco_voice_setting(void){ 4901 return hci_stack->sco_voice_setting; 4902 } 4903 4904 #ifdef ENABLE_CLASSIC 4905 #ifdef ENABLE_SCO_OVER_HCI 4906 static int hci_have_usb_transport(void){ 4907 if (!hci_stack->hci_transport) return 0; 4908 const char * transport_name = hci_stack->hci_transport->name; 4909 if (!transport_name) return 0; 4910 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 4911 } 4912 #endif 4913 #endif 4914 4915 /** @brief Get SCO packet length for current SCO Voice setting 4916 * @note Using SCO packets of the exact length is required for USB transfer 4917 * @return Length of SCO packets in bytes (not audio frames) 4918 */ 4919 int hci_get_sco_packet_length(void){ 4920 int sco_packet_length = 0; 4921 4922 #ifdef ENABLE_CLASSIC 4923 #ifdef ENABLE_SCO_OVER_HCI 4924 4925 // CVSD requires twice as much bytes 4926 int multiplier = hci_stack->sco_voice_setting_active & 0x0020 ? 2 : 1; 4927 4928 if (hci_have_usb_transport()){ 4929 // see Core Spec for H2 USB Transfer. 4930 // 3 byte SCO header + 24 bytes per connection 4931 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 4932 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 4933 } else { 4934 // 3 byte SCO header + SCO packet size over the air (60 bytes) 4935 sco_packet_length = 3 + 60 * multiplier; 4936 } 4937 #endif 4938 #endif 4939 return sco_packet_length; 4940 } 4941 4942 /** 4943 * @brief Sets the master/slave policy 4944 * @param policy (0: attempt to become master, 1: let connecting device decide) 4945 */ 4946 void hci_set_master_slave_policy(uint8_t policy){ 4947 hci_stack->master_slave_policy = policy; 4948 } 4949 4950 #endif 4951 4952 HCI_STATE hci_get_state(void){ 4953 return hci_stack->state; 4954 } 4955 4956 4957 /** 4958 * @brief Set callback for Bluetooth Hardware Error 4959 */ 4960 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 4961 hci_stack->hardware_error_callback = fn; 4962 } 4963 4964 void hci_disconnect_all(void){ 4965 btstack_linked_list_iterator_t it; 4966 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4967 while (btstack_linked_list_iterator_has_next(&it)){ 4968 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4969 if (con->state == SENT_DISCONNECT) continue; 4970 con->state = SEND_DISCONNECT; 4971 } 4972 hci_run(); 4973 } 4974 4975 uint16_t hci_get_manufacturer(void){ 4976 return hci_stack->manufacturer; 4977 } 4978 4979 #ifdef ENABLE_BLE 4980 4981 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 4982 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 4983 if (!hci_con) return NULL; 4984 return &hci_con->sm_connection; 4985 } 4986 4987 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 4988 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 4989 4990 int gap_encryption_key_size(hci_con_handle_t con_handle){ 4991 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4992 if (!sm_conn) return 0; // wrong connection 4993 if (!sm_conn->sm_connection_encrypted) return 0; 4994 return sm_conn->sm_actual_encryption_key_size; 4995 } 4996 4997 int gap_authenticated(hci_con_handle_t con_handle){ 4998 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 4999 if (!sm_conn) return 0; // wrong connection 5000 if (!sm_conn->sm_connection_encrypted) return 0; // unencrypted connection cannot be authenticated 5001 return sm_conn->sm_connection_authenticated; 5002 } 5003 5004 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5005 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5006 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5007 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5008 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5009 return sm_conn->sm_connection_authorization_state; 5010 } 5011 #endif 5012 5013 #ifdef ENABLE_CLASSIC 5014 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){ 5015 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5016 if (!conn) return GAP_CONNECTION_INVALID; 5017 conn->sniff_min_interval = sniff_min_interval; 5018 conn->sniff_max_interval = sniff_max_interval; 5019 conn->sniff_attempt = sniff_attempt; 5020 conn->sniff_timeout = sniff_timeout; 5021 hci_run(); 5022 return 0; 5023 } 5024 5025 /** 5026 * @brief Exit Sniff mode 5027 * @param con_handle 5028 @ @return 0 if ok 5029 */ 5030 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5031 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5032 if (!conn) return GAP_CONNECTION_INVALID; 5033 conn->sniff_min_interval = 0xffff; 5034 hci_run(); 5035 return 0; 5036 } 5037 #endif 5038 5039 void hci_halting_defer(void){ 5040 if (hci_stack->state != HCI_STATE_HALTING) return; 5041 switch (hci_stack->substate){ 5042 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5043 case HCI_HALTING_CLOSE: 5044 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5045 break; 5046 default: 5047 break; 5048 } 5049 } 5050