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_CLASSIC 158 static int hci_have_usb_transport(void); 159 #endif 160 161 #ifdef ENABLE_BLE 162 #ifdef ENABLE_LE_CENTRAL 163 // called from test/ble_client/advertising_data_parser.c 164 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 165 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 166 static hci_connection_t * gap_get_outgoing_connection(void); 167 #endif 168 #endif 169 170 // the STACK is here 171 #ifndef HAVE_MALLOC 172 static hci_stack_t hci_stack_static; 173 #endif 174 static hci_stack_t * hci_stack = NULL; 175 176 #ifdef ENABLE_CLASSIC 177 // default name 178 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 179 180 // test helper 181 static uint8_t disable_l2cap_timeouts = 0; 182 #endif 183 184 /** 185 * create connection for given address 186 * 187 * @return connection OR NULL, if no memory left 188 */ 189 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 190 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 191 hci_connection_t * conn = btstack_memory_hci_connection_get(); 192 if (!conn) return NULL; 193 bd_addr_copy(conn->address, addr); 194 conn->address_type = addr_type; 195 conn->con_handle = 0xffff; 196 conn->authentication_flags = AUTH_FLAGS_NONE; 197 conn->bonding_flags = 0; 198 conn->requested_security_level = LEVEL_0; 199 #ifdef ENABLE_CLASSIC 200 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 201 btstack_run_loop_set_timer_context(&conn->timeout, conn); 202 hci_connection_timestamp(conn); 203 #endif 204 conn->acl_recombination_length = 0; 205 conn->acl_recombination_pos = 0; 206 conn->num_packets_sent = 0; 207 208 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 209 #ifdef ENABLE_BLE 210 conn->le_phy_update_all_phys = 0xff; 211 #endif 212 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 213 return conn; 214 } 215 216 217 /** 218 * get le connection parameter range 219 * 220 * @return le connection parameter range struct 221 */ 222 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 223 *range = hci_stack->le_connection_parameter_range; 224 } 225 226 /** 227 * set le connection parameter range 228 * 229 */ 230 231 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 232 hci_stack->le_connection_parameter_range = *range; 233 } 234 235 /** 236 * @brief Test if connection parameters are inside in existing rage 237 * @param conn_interval_min (unit: 1.25ms) 238 * @param conn_interval_max (unit: 1.25ms) 239 * @param conn_latency 240 * @param supervision_timeout (unit: 10ms) 241 * @returns 1 if included 242 */ 243 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){ 244 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 245 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 246 247 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 248 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 249 250 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 251 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 252 253 return 1; 254 } 255 256 /** 257 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 258 * @note: default: 1 259 * @param max_peripheral_connections 260 */ 261 #ifdef ENABLE_LE_PERIPHERAL 262 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 263 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 264 } 265 #endif 266 267 /** 268 * get hci connections iterator 269 * 270 * @return hci connections iterator 271 */ 272 273 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 274 btstack_linked_list_iterator_init(it, &hci_stack->connections); 275 } 276 277 /** 278 * get connection for a given handle 279 * 280 * @return connection OR NULL, if not found 281 */ 282 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 283 btstack_linked_list_iterator_t it; 284 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 285 while (btstack_linked_list_iterator_has_next(&it)){ 286 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 287 if ( item->con_handle == con_handle ) { 288 return item; 289 } 290 } 291 return NULL; 292 } 293 294 /** 295 * get connection for given address 296 * 297 * @return connection OR NULL, if not found 298 */ 299 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 300 btstack_linked_list_iterator_t it; 301 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 302 while (btstack_linked_list_iterator_has_next(&it)){ 303 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 304 if (connection->address_type != addr_type) continue; 305 if (memcmp(addr, connection->address, 6) != 0) continue; 306 return connection; 307 } 308 return NULL; 309 } 310 311 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 312 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 313 } 314 315 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 316 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 317 } 318 319 #ifdef ENABLE_CLASSIC 320 321 #ifdef ENABLE_SCO_OVER_HCI 322 static int hci_number_sco_connections(void){ 323 int connections = 0; 324 btstack_linked_list_iterator_t it; 325 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 326 while (btstack_linked_list_iterator_has_next(&it)){ 327 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 328 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 329 connections++; 330 } 331 return connections; 332 } 333 #endif 334 335 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 336 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 337 #ifdef HAVE_EMBEDDED_TICK 338 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 339 // connections might be timed out 340 hci_emit_l2cap_check_timeout(connection); 341 } 342 #else 343 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 344 // connections might be timed out 345 hci_emit_l2cap_check_timeout(connection); 346 } 347 #endif 348 } 349 350 static void hci_connection_timestamp(hci_connection_t *connection){ 351 #ifdef HAVE_EMBEDDED_TICK 352 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 353 #else 354 connection->timestamp = btstack_run_loop_get_time_ms(); 355 #endif 356 } 357 358 /** 359 * add authentication flags and reset timer 360 * @note: assumes classic connection 361 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 362 */ 363 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 364 bd_addr_t addr; 365 reverse_bd_addr(bd_addr, addr); 366 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 367 if (conn) { 368 connectionSetAuthenticationFlags(conn, flags); 369 hci_connection_timestamp(conn); 370 } 371 } 372 373 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 374 hci_connection_t * conn = hci_connection_for_handle(handle); 375 if (!conn) return 0; 376 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 377 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 378 return 0; 379 } 380 381 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 382 if (!hci_stack->link_key_db) return; 383 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 384 hci_stack->link_key_db->delete_link_key(addr); 385 } 386 387 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 388 if (!hci_stack->link_key_db) return; 389 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 390 hci_stack->link_key_db->put_link_key(addr, link_key, type); 391 } 392 393 void gap_delete_all_link_keys(void){ 394 bd_addr_t addr; 395 link_key_t link_key; 396 link_key_type_t type; 397 btstack_link_key_iterator_t it; 398 int ok = gap_link_key_iterator_init(&it); 399 if (!ok) { 400 log_error("could not initialize iterator"); 401 return; 402 } 403 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 404 gap_drop_link_key_for_bd_addr(addr); 405 } 406 gap_link_key_iterator_done(&it); 407 } 408 409 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 410 if (!hci_stack->link_key_db) return 0; 411 if (!hci_stack->link_key_db->iterator_init) return 0; 412 return hci_stack->link_key_db->iterator_init(it); 413 } 414 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){ 415 if (!hci_stack->link_key_db) return 0; 416 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 417 } 418 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 419 if (!hci_stack->link_key_db) return; 420 hci_stack->link_key_db->iterator_done(it); 421 } 422 #endif 423 424 static int hci_is_le_connection(hci_connection_t * connection){ 425 switch (connection->address_type){ 426 case BD_ADDR_TYPE_LE_PUBLIC: 427 case BD_ADDR_TYPE_LE_RANDOM: 428 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 429 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 430 return 1; 431 default: 432 return 0; 433 } 434 } 435 436 /** 437 * count connections 438 */ 439 static int nr_hci_connections(void){ 440 int count = 0; 441 btstack_linked_item_t *it; 442 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 443 return count; 444 } 445 446 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 447 448 unsigned int num_packets_sent_classic = 0; 449 unsigned int num_packets_sent_le = 0; 450 451 btstack_linked_item_t *it; 452 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 453 hci_connection_t * connection = (hci_connection_t *) it; 454 if (hci_is_le_connection(connection)){ 455 num_packets_sent_le += connection->num_packets_sent; 456 } 457 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 458 num_packets_sent_classic += connection->num_packets_sent; 459 } 460 } 461 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 462 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 463 int free_slots_le = 0; 464 465 if (free_slots_classic < 0){ 466 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); 467 return 0; 468 } 469 470 if (hci_stack->le_acl_packets_total_num){ 471 // if we have LE slots, they are used 472 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 473 if (free_slots_le < 0){ 474 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); 475 return 0; 476 } 477 } else { 478 // otherwise, classic slots are used for LE, too 479 free_slots_classic -= num_packets_sent_le; 480 if (free_slots_classic < 0){ 481 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); 482 return 0; 483 } 484 } 485 486 switch (address_type){ 487 case BD_ADDR_TYPE_UNKNOWN: 488 log_error("hci_number_free_acl_slots: unknown address type"); 489 return 0; 490 491 case BD_ADDR_TYPE_CLASSIC: 492 return free_slots_classic; 493 494 default: 495 if (hci_stack->le_acl_packets_total_num){ 496 return free_slots_le; 497 } 498 return free_slots_classic; 499 } 500 } 501 502 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 503 // get connection type 504 hci_connection_t * connection = hci_connection_for_handle(con_handle); 505 if (!connection){ 506 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 507 return 0; 508 } 509 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 510 } 511 512 #ifdef ENABLE_CLASSIC 513 static int hci_number_free_sco_slots(void){ 514 unsigned int num_sco_packets_sent = 0; 515 btstack_linked_item_t *it; 516 if (hci_stack->synchronous_flow_control_enabled){ 517 // explicit flow control 518 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 519 hci_connection_t * connection = (hci_connection_t *) it; 520 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 521 num_sco_packets_sent += connection->num_packets_sent; 522 } 523 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 524 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 525 return 0; 526 } 527 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 528 } else { 529 // implicit flow control -- TODO 530 int num_ready = 0; 531 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 532 hci_connection_t * connection = (hci_connection_t *) it; 533 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 534 if (connection->sco_tx_ready == 0) continue; 535 num_ready++; 536 } 537 return num_ready; 538 } 539 } 540 #endif 541 542 // only used to send HCI Host Number Completed Packets 543 static int hci_can_send_comand_packet_transport(void){ 544 if (hci_stack->hci_packet_buffer_reserved) return 0; 545 546 // check for async hci transport implementations 547 if (hci_stack->hci_transport->can_send_packet_now){ 548 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 549 return 0; 550 } 551 } 552 return 1; 553 } 554 555 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 556 int hci_can_send_command_packet_now(void){ 557 if (hci_can_send_comand_packet_transport() == 0) return 0; 558 return hci_stack->num_cmd_packets > 0; 559 } 560 561 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 562 // check for async hci transport implementations 563 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 564 return hci_stack->hci_transport->can_send_packet_now(packet_type); 565 } 566 567 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 568 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 569 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 570 } 571 572 int hci_can_send_acl_le_packet_now(void){ 573 if (hci_stack->hci_packet_buffer_reserved) return 0; 574 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 575 } 576 577 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 578 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 579 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 580 } 581 582 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 583 if (hci_stack->hci_packet_buffer_reserved) return 0; 584 return hci_can_send_prepared_acl_packet_now(con_handle); 585 } 586 587 #ifdef ENABLE_CLASSIC 588 int hci_can_send_acl_classic_packet_now(void){ 589 if (hci_stack->hci_packet_buffer_reserved) return 0; 590 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 591 } 592 593 int hci_can_send_prepared_sco_packet_now(void){ 594 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 595 if (hci_have_usb_transport()){ 596 return hci_stack->sco_can_send_now; 597 } else { 598 return hci_number_free_sco_slots() > 0; 599 } 600 } 601 602 int hci_can_send_sco_packet_now(void){ 603 if (hci_stack->hci_packet_buffer_reserved) return 0; 604 return hci_can_send_prepared_sco_packet_now(); 605 } 606 607 void hci_request_sco_can_send_now_event(void){ 608 hci_stack->sco_waiting_for_can_send_now = 1; 609 hci_notify_if_sco_can_send_now(); 610 } 611 #endif 612 613 // used for internal checks in l2cap.c 614 int hci_is_packet_buffer_reserved(void){ 615 return hci_stack->hci_packet_buffer_reserved; 616 } 617 618 // reserves outgoing packet buffer. @returns 1 if successful 619 int hci_reserve_packet_buffer(void){ 620 if (hci_stack->hci_packet_buffer_reserved) { 621 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 622 return 0; 623 } 624 hci_stack->hci_packet_buffer_reserved = 1; 625 return 1; 626 } 627 628 void hci_release_packet_buffer(void){ 629 hci_stack->hci_packet_buffer_reserved = 0; 630 } 631 632 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 633 static int hci_transport_synchronous(void){ 634 return hci_stack->hci_transport->can_send_packet_now == NULL; 635 } 636 637 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 638 639 // 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); 640 641 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 642 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 643 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 644 max_acl_data_packet_length = hci_stack->le_data_packets_length; 645 } 646 647 // testing: reduce buffer to minimum 648 // max_acl_data_packet_length = 52; 649 650 log_debug("hci_send_acl_packet_fragments entered"); 651 652 int err; 653 // multiple packets could be send on a synchronous HCI transport 654 while (1){ 655 656 log_debug("hci_send_acl_packet_fragments loop entered"); 657 658 // get current data 659 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 660 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 661 int more_fragments = 0; 662 663 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 664 if (current_acl_data_packet_length > max_acl_data_packet_length){ 665 more_fragments = 1; 666 current_acl_data_packet_length = max_acl_data_packet_length; 667 } 668 669 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 670 if (acl_header_pos > 0){ 671 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 672 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 673 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 674 } 675 676 // update header len 677 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 678 679 // count packet 680 connection->num_packets_sent++; 681 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 682 683 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 684 if (more_fragments){ 685 // update start of next fragment to send 686 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 687 } else { 688 // done 689 hci_stack->acl_fragmentation_pos = 0; 690 hci_stack->acl_fragmentation_total_size = 0; 691 } 692 693 // send packet 694 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 695 const int size = current_acl_data_packet_length + 4; 696 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 697 hci_stack->acl_fragmentation_tx_active = 1; 698 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 699 700 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 701 702 // done yet? 703 if (!more_fragments) break; 704 705 // can send more? 706 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 707 } 708 709 log_debug("hci_send_acl_packet_fragments loop over"); 710 711 // release buffer now for synchronous transport 712 if (hci_transport_synchronous()){ 713 hci_stack->acl_fragmentation_tx_active = 0; 714 hci_release_packet_buffer(); 715 hci_emit_transport_packet_sent(); 716 } 717 718 return err; 719 } 720 721 // pre: caller has reserved the packet buffer 722 int hci_send_acl_packet_buffer(int size){ 723 724 // log_info("hci_send_acl_packet_buffer size %u", size); 725 726 if (!hci_stack->hci_packet_buffer_reserved) { 727 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 728 return 0; 729 } 730 731 uint8_t * packet = hci_stack->hci_packet_buffer; 732 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 733 734 // check for free places on Bluetooth module 735 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 736 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 737 hci_release_packet_buffer(); 738 hci_emit_transport_packet_sent(); 739 return BTSTACK_ACL_BUFFERS_FULL; 740 } 741 742 hci_connection_t *connection = hci_connection_for_handle( con_handle); 743 if (!connection) { 744 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 745 hci_release_packet_buffer(); 746 hci_emit_transport_packet_sent(); 747 return 0; 748 } 749 750 #ifdef ENABLE_CLASSIC 751 hci_connection_timestamp(connection); 752 #endif 753 754 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 755 756 // setup data 757 hci_stack->acl_fragmentation_total_size = size; 758 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 759 760 return hci_send_acl_packet_fragments(connection); 761 } 762 763 #ifdef ENABLE_CLASSIC 764 // pre: caller has reserved the packet buffer 765 int hci_send_sco_packet_buffer(int size){ 766 767 // log_info("hci_send_acl_packet_buffer size %u", size); 768 769 if (!hci_stack->hci_packet_buffer_reserved) { 770 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 771 return 0; 772 } 773 774 uint8_t * packet = hci_stack->hci_packet_buffer; 775 776 // skip checks in loopback mode 777 if (!hci_stack->loopback_mode){ 778 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 779 780 // check for free places on Bluetooth module 781 if (!hci_can_send_prepared_sco_packet_now()) { 782 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 783 hci_release_packet_buffer(); 784 hci_emit_transport_packet_sent(); 785 return BTSTACK_ACL_BUFFERS_FULL; 786 } 787 788 // track send packet in connection struct 789 hci_connection_t *connection = hci_connection_for_handle( con_handle); 790 if (!connection) { 791 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 792 hci_release_packet_buffer(); 793 hci_emit_transport_packet_sent(); 794 return 0; 795 } 796 797 if (hci_have_usb_transport()){ 798 // token used 799 hci_stack->sco_can_send_now = 0; 800 } else { 801 if (hci_stack->synchronous_flow_control_enabled){ 802 connection->num_packets_sent++; 803 } else { 804 connection->sco_tx_ready--; 805 } 806 } 807 } 808 809 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 810 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 811 812 if (hci_transport_synchronous()){ 813 hci_release_packet_buffer(); 814 hci_emit_transport_packet_sent(); 815 } 816 817 return err; 818 } 819 #endif 820 821 static void acl_handler(uint8_t *packet, int size){ 822 823 // log_info("acl_handler: size %u", size); 824 825 // get info 826 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 827 hci_connection_t *conn = hci_connection_for_handle(con_handle); 828 uint8_t acl_flags = READ_ACL_FLAGS(packet); 829 uint16_t acl_length = READ_ACL_LENGTH(packet); 830 831 // ignore non-registered handle 832 if (!conn){ 833 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 834 return; 835 } 836 837 // assert packet is complete 838 if (acl_length + 4 != size){ 839 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 840 return; 841 } 842 843 #ifdef ENABLE_CLASSIC 844 // update idle timestamp 845 hci_connection_timestamp(conn); 846 #endif 847 848 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 849 hci_stack->host_completed_packets = 1; 850 conn->num_packets_completed++; 851 #endif 852 853 // handle different packet types 854 switch (acl_flags & 0x03) { 855 856 case 0x01: // continuation fragment 857 858 // sanity checks 859 if (conn->acl_recombination_pos == 0) { 860 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 861 return; 862 } 863 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 864 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 865 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 866 conn->acl_recombination_pos = 0; 867 return; 868 } 869 870 // append fragment payload (header already stored) 871 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 872 conn->acl_recombination_pos += acl_length; 873 874 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 875 // conn->acl_recombination_pos, conn->acl_recombination_length); 876 877 // forward complete L2CAP packet if complete. 878 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 879 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 880 // reset recombination buffer 881 conn->acl_recombination_length = 0; 882 conn->acl_recombination_pos = 0; 883 } 884 break; 885 886 case 0x02: { // first fragment 887 888 // sanity check 889 if (conn->acl_recombination_pos) { 890 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 891 conn->acl_recombination_pos = 0; 892 } 893 894 // peek into L2CAP packet! 895 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 896 897 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 898 899 // compare fragment size to L2CAP packet size 900 if (acl_length >= l2cap_length + 4){ 901 // forward fragment as L2CAP packet 902 hci_emit_acl_packet(packet, acl_length + 4); 903 } else { 904 905 if (acl_length > HCI_ACL_BUFFER_SIZE){ 906 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 907 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 908 return; 909 } 910 911 // store first fragment and tweak acl length for complete package 912 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 913 conn->acl_recombination_pos = acl_length + 4; 914 conn->acl_recombination_length = l2cap_length; 915 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 916 } 917 break; 918 919 } 920 default: 921 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 922 return; 923 } 924 925 // execute main loop 926 hci_run(); 927 } 928 929 static void hci_shutdown_connection(hci_connection_t *conn){ 930 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 931 932 #ifdef ENABLE_CLASSIC 933 #ifdef ENABLE_SCO_OVER_HCI 934 int addr_type = conn->address_type; 935 #endif 936 #endif 937 938 btstack_run_loop_remove_timer(&conn->timeout); 939 940 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 941 btstack_memory_hci_connection_free( conn ); 942 943 // now it's gone 944 hci_emit_nr_connections_changed(); 945 946 #ifdef ENABLE_CLASSIC 947 #ifdef ENABLE_SCO_OVER_HCI 948 // update SCO 949 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 950 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 951 } 952 #endif 953 #endif 954 } 955 956 #ifdef ENABLE_CLASSIC 957 958 static const uint16_t packet_type_sizes[] = { 959 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 960 HCI_ACL_DH1_SIZE, 0, 0, 0, 961 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 962 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 963 }; 964 static const uint8_t packet_type_feature_requirement_bit[] = { 965 0, // 3 slot packets 966 1, // 5 slot packets 967 25, // EDR 2 mpbs 968 26, // EDR 3 mbps 969 39, // 3 slot EDR packts 970 40, // 5 slot EDR packet 971 }; 972 static const uint16_t packet_type_feature_packet_mask[] = { 973 0x0f00, // 3 slot packets 974 0xf000, // 5 slot packets 975 0x1102, // EDR 2 mpbs 976 0x2204, // EDR 3 mbps 977 0x0300, // 3 slot EDR packts 978 0x3000, // 5 slot EDR packet 979 }; 980 981 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 982 // enable packet types based on size 983 uint16_t packet_types = 0; 984 unsigned int i; 985 for (i=0;i<16;i++){ 986 if (packet_type_sizes[i] == 0) continue; 987 if (packet_type_sizes[i] <= buffer_size){ 988 packet_types |= 1 << i; 989 } 990 } 991 // disable packet types due to missing local supported features 992 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 993 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 994 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 995 if (feature_set) continue; 996 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 997 packet_types &= ~packet_type_feature_packet_mask[i]; 998 } 999 // flip bits for "may not be used" 1000 packet_types ^= 0x3306; 1001 return packet_types; 1002 } 1003 1004 uint16_t hci_usable_acl_packet_types(void){ 1005 return hci_stack->packet_types; 1006 } 1007 #endif 1008 1009 uint8_t* hci_get_outgoing_packet_buffer(void){ 1010 // hci packet buffer is >= acl data packet length 1011 return hci_stack->hci_packet_buffer; 1012 } 1013 1014 uint16_t hci_max_acl_data_packet_length(void){ 1015 return hci_stack->acl_data_packet_length; 1016 } 1017 1018 #ifdef ENABLE_CLASSIC 1019 int hci_extended_sco_link_supported(void){ 1020 // No. 31, byte 3, bit 7 1021 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1022 } 1023 #endif 1024 1025 int hci_non_flushable_packet_boundary_flag_supported(void){ 1026 // No. 54, byte 6, bit 6 1027 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 1028 } 1029 1030 static int gap_ssp_supported(void){ 1031 // No. 51, byte 6, bit 3 1032 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 1033 } 1034 1035 static int hci_classic_supported(void){ 1036 #ifdef ENABLE_CLASSIC 1037 // No. 37, byte 4, bit 5, = No BR/EDR Support 1038 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1039 #else 1040 return 0; 1041 #endif 1042 } 1043 1044 static int hci_le_supported(void){ 1045 #ifdef ENABLE_BLE 1046 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1047 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1048 #else 1049 return 0; 1050 #endif 1051 } 1052 1053 #ifdef ENABLE_BLE 1054 1055 /** 1056 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1057 */ 1058 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1059 *addr_type = hci_stack->le_own_addr_type; 1060 if (hci_stack->le_own_addr_type){ 1061 memcpy(addr, hci_stack->le_random_address, 6); 1062 } else { 1063 memcpy(addr, hci_stack->local_bd_addr, 6); 1064 } 1065 } 1066 1067 #ifdef ENABLE_LE_CENTRAL 1068 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1069 1070 int offset = 3; 1071 int num_reports = packet[offset]; 1072 offset += 1; 1073 1074 int i; 1075 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1076 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1077 for (i=0; i<num_reports && offset < size;i++){ 1078 // sanity checks on data_length: 1079 uint8_t data_length = packet[offset + 8]; 1080 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1081 if (offset + 9 + data_length + 1 > size) return; 1082 // setup event 1083 uint8_t event_size = 10 + data_length; 1084 int pos = 0; 1085 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1086 event[pos++] = event_size; 1087 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 1088 offset += 8; 1089 pos += 8; 1090 event[pos++] = packet[offset + 1 + data_length]; // rssi 1091 event[pos++] = data_length; 1092 offset++; 1093 memcpy(&event[pos], &packet[offset], data_length); 1094 pos += data_length; 1095 offset += data_length + 1; // rssi 1096 hci_emit_event(event, pos, 1); 1097 } 1098 } 1099 #endif 1100 #endif 1101 1102 #ifdef ENABLE_BLE 1103 #ifdef ENABLE_LE_PERIPHERAL 1104 static void hci_reenable_advertisements_if_needed(void){ 1105 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1106 // get number of active le slave connections 1107 int num_slave_connections = 0; 1108 btstack_linked_list_iterator_t it; 1109 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1110 while (btstack_linked_list_iterator_has_next(&it)){ 1111 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1112 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1113 if (con->state != OPEN) continue; 1114 if (con->role != HCI_ROLE_SLAVE) continue; 1115 if (!hci_is_le_connection(con)) continue; 1116 num_slave_connections++; 1117 } 1118 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1119 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1120 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1121 } 1122 } 1123 } 1124 #endif 1125 #endif 1126 1127 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1128 1129 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1130 if (!hci_stack->config) return 0; 1131 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1132 // Limit baud rate for Broadcom chipsets to 3 mbps 1133 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 1134 baud_rate = 3000000; 1135 } 1136 return baud_rate; 1137 } 1138 1139 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1140 UNUSED(ds); 1141 1142 switch (hci_stack->substate){ 1143 case HCI_INIT_W4_SEND_RESET: 1144 log_info("Resend HCI Reset"); 1145 hci_stack->substate = HCI_INIT_SEND_RESET; 1146 hci_stack->num_cmd_packets = 1; 1147 hci_run(); 1148 break; 1149 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1150 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1151 if (hci_stack->hci_transport->reset_link){ 1152 hci_stack->hci_transport->reset_link(); 1153 } 1154 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1155 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1156 log_info("Resend HCI Reset - CSR Warm Boot"); 1157 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1158 hci_stack->num_cmd_packets = 1; 1159 hci_run(); 1160 break; 1161 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1162 if (hci_stack->hci_transport->set_baudrate){ 1163 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1164 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1165 hci_stack->hci_transport->set_baudrate(baud_rate); 1166 } 1167 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1168 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1169 if (hci_stack->hci_transport->reset_link){ 1170 log_info("Link Reset"); 1171 hci_stack->hci_transport->reset_link(); 1172 } 1173 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1174 hci_run(); 1175 } 1176 break; 1177 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1178 // otherwise continue 1179 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1180 hci_send_cmd(&hci_read_local_supported_commands); 1181 break; 1182 default: 1183 break; 1184 } 1185 } 1186 #endif 1187 1188 static void hci_initializing_next_state(void){ 1189 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1190 } 1191 1192 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_PERIPHERAL) 1193 static void hci_replace_bd_addr_placeholder(uint8_t * data, uint16_t size){ 1194 const int bd_addr_string_len = 17; 1195 int i = 0; 1196 while (i < size - bd_addr_string_len){ 1197 if (memcmp(&data[i], "00:00:00:00:00:00", bd_addr_string_len)) { 1198 i++; 1199 continue; 1200 } 1201 // set real address 1202 memcpy(&data[i], bd_addr_to_str(hci_stack->local_bd_addr), bd_addr_string_len); 1203 i += bd_addr_string_len; 1204 } 1205 } 1206 #endif 1207 1208 // assumption: hci_can_send_command_packet_now() == true 1209 static void hci_initializing_run(void){ 1210 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1211 switch (hci_stack->substate){ 1212 case HCI_INIT_SEND_RESET: 1213 hci_state_reset(); 1214 1215 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1216 // prepare reset if command complete not received in 100ms 1217 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1218 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1219 btstack_run_loop_add_timer(&hci_stack->timeout); 1220 #endif 1221 // send command 1222 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1223 hci_send_cmd(&hci_reset); 1224 break; 1225 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1226 hci_send_cmd(&hci_read_local_version_information); 1227 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1228 break; 1229 case HCI_INIT_SEND_READ_LOCAL_NAME: 1230 hci_send_cmd(&hci_read_local_name); 1231 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1232 break; 1233 1234 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1235 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1236 hci_state_reset(); 1237 // prepare reset if command complete not received in 100ms 1238 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1239 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1240 btstack_run_loop_add_timer(&hci_stack->timeout); 1241 // send command 1242 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1243 hci_send_cmd(&hci_reset); 1244 break; 1245 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1246 hci_state_reset(); 1247 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1248 hci_send_cmd(&hci_reset); 1249 break; 1250 case HCI_INIT_SEND_BAUD_CHANGE: { 1251 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1252 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1253 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1254 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1255 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1256 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1257 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1258 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1259 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1260 btstack_run_loop_add_timer(&hci_stack->timeout); 1261 } 1262 break; 1263 } 1264 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1265 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1266 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1267 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1268 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1269 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1270 break; 1271 } 1272 case HCI_INIT_CUSTOM_INIT: 1273 // Custom initialization 1274 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1275 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1276 int send_cmd = 0; 1277 switch (hci_stack->chipset_result){ 1278 case BTSTACK_CHIPSET_VALID_COMMAND: 1279 send_cmd = 1; 1280 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1281 break; 1282 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1283 send_cmd = 1; 1284 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1285 log_info("CSR Warm Boot"); 1286 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1287 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1288 btstack_run_loop_add_timer(&hci_stack->timeout); 1289 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1290 && hci_stack->config 1291 && hci_stack->chipset 1292 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1293 && hci_stack->hci_transport->set_baudrate 1294 && hci_transport_uart_get_main_baud_rate()){ 1295 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1296 } else { 1297 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1298 } 1299 break; 1300 default: 1301 break; 1302 } 1303 1304 if (send_cmd){ 1305 int size = 3 + hci_stack->hci_packet_buffer[2]; 1306 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1307 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1308 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1309 break; 1310 } 1311 log_info("Init script done"); 1312 1313 // Init script download on Broadcom chipsets causes: 1314 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1315 ( hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION 1316 || hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA) ){ 1317 1318 // - baud rate to reset, restore UART baud rate if needed 1319 int need_baud_change = hci_stack->config 1320 && hci_stack->chipset 1321 && hci_stack->chipset->set_baudrate_command 1322 && hci_stack->hci_transport->set_baudrate 1323 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1324 if (need_baud_change) { 1325 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1326 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1327 hci_stack->hci_transport->set_baudrate(baud_rate); 1328 } 1329 1330 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1331 // -> Work around: wait a few milliseconds here. 1332 log_info("BCM delay after init script"); 1333 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1334 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1335 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1336 btstack_run_loop_add_timer(&hci_stack->timeout); 1337 break; 1338 } 1339 } 1340 // otherwise continue 1341 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1342 hci_send_cmd(&hci_read_local_supported_commands); 1343 break; 1344 case HCI_INIT_SET_BD_ADDR: 1345 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1346 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1347 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1348 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1349 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1350 break; 1351 #endif 1352 1353 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1354 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1355 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1356 hci_send_cmd(&hci_read_local_supported_commands); 1357 break; 1358 case HCI_INIT_READ_BD_ADDR: 1359 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1360 hci_send_cmd(&hci_read_bd_addr); 1361 break; 1362 case HCI_INIT_READ_BUFFER_SIZE: 1363 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1364 hci_send_cmd(&hci_read_buffer_size); 1365 break; 1366 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1367 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1368 hci_send_cmd(&hci_read_local_supported_features); 1369 break; 1370 1371 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1372 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1373 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1374 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1375 break; 1376 case HCI_INIT_HOST_BUFFER_SIZE: 1377 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1378 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1379 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1380 break; 1381 #endif 1382 1383 case HCI_INIT_SET_EVENT_MASK: 1384 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1385 if (hci_le_supported()){ 1386 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1387 } else { 1388 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1389 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1390 } 1391 break; 1392 1393 #ifdef ENABLE_CLASSIC 1394 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1395 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1396 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1397 break; 1398 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1399 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1400 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1401 break; 1402 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1403 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1404 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1405 break; 1406 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1407 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1408 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1409 break; 1410 case HCI_INIT_WRITE_LOCAL_NAME: { 1411 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1412 hci_reserve_packet_buffer(); 1413 uint8_t * packet = hci_stack->hci_packet_buffer; 1414 // construct HCI Command and send 1415 uint16_t opcode = hci_write_local_name.opcode; 1416 hci_stack->last_cmd_opcode = opcode; 1417 packet[0] = opcode & 0xff; 1418 packet[1] = opcode >> 8; 1419 packet[2] = DEVICE_NAME_LEN; 1420 memset(&packet[3], 0, DEVICE_NAME_LEN); 1421 memcpy(&packet[3], hci_stack->local_name, strlen(hci_stack->local_name)); 1422 // expand '00:00:00:00:00:00' in name with bd_addr 1423 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1424 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1425 break; 1426 } 1427 case HCI_INIT_WRITE_EIR_DATA: { 1428 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1429 hci_reserve_packet_buffer(); 1430 uint8_t * packet = hci_stack->hci_packet_buffer; 1431 // construct HCI Command and send 1432 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1433 hci_stack->last_cmd_opcode = opcode; 1434 packet[0] = opcode & 0xff; 1435 packet[1] = opcode >> 8; 1436 packet[2] = 1 + 240; 1437 packet[3] = 0; // FEC not required 1438 if (hci_stack->eir_data){ 1439 memcpy(&packet[4], hci_stack->eir_data, 240); 1440 } else { 1441 memset(&packet[4], 0, 240); 1442 int name_len = strlen(hci_stack->local_name); 1443 packet[4] = name_len + 1; 1444 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1445 memcpy(&packet[6], hci_stack->local_name, name_len); 1446 } 1447 // expand '00:00:00:00:00:00' in name with bd_addr 1448 hci_replace_bd_addr_placeholder(&packet[4], 240); 1449 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1450 break; 1451 } 1452 case HCI_INIT_WRITE_INQUIRY_MODE: 1453 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1454 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1455 break; 1456 case HCI_INIT_WRITE_SCAN_ENABLE: 1457 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1458 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1459 break; 1460 // only sent if ENABLE_SCO_OVER_HCI is defined 1461 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1462 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1463 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1464 break; 1465 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1466 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1467 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1468 break; 1469 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1470 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1471 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1472 log_info("BCM: Route SCO data via HCI transport"); 1473 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1474 break; 1475 1476 #endif 1477 #ifdef ENABLE_BLE 1478 // LE INIT 1479 case HCI_INIT_LE_READ_BUFFER_SIZE: 1480 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1481 hci_send_cmd(&hci_le_read_buffer_size); 1482 break; 1483 case HCI_INIT_LE_SET_EVENT_MASK: 1484 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1485 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1486 break; 1487 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1488 // LE Supported Host = 1, Simultaneous Host = 0 1489 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1490 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1491 break; 1492 #endif 1493 1494 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1495 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1496 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1497 hci_send_cmd(&hci_le_read_maximum_data_length); 1498 break; 1499 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1500 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1501 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1502 break; 1503 #endif 1504 1505 #ifdef ENABLE_LE_CENTRAL 1506 case HCI_INIT_READ_WHITE_LIST_SIZE: 1507 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1508 hci_send_cmd(&hci_le_read_white_list_size); 1509 break; 1510 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1511 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1512 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1513 hci_send_cmd(&hci_le_set_scan_parameters, 1, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, 0); 1514 break; 1515 #endif 1516 default: 1517 return; 1518 } 1519 } 1520 1521 static void hci_init_done(void){ 1522 // done. tell the app 1523 log_info("hci_init_done -> HCI_STATE_WORKING"); 1524 hci_stack->state = HCI_STATE_WORKING; 1525 hci_emit_state(); 1526 hci_run(); 1527 } 1528 1529 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1530 1531 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1532 1533 uint8_t command_completed = 0; 1534 1535 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1536 uint16_t opcode = little_endian_read_16(packet,3); 1537 if (opcode == hci_stack->last_cmd_opcode){ 1538 command_completed = 1; 1539 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1540 } else { 1541 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1542 } 1543 } 1544 1545 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1546 uint8_t status = packet[2]; 1547 uint16_t opcode = little_endian_read_16(packet,4); 1548 if (opcode == hci_stack->last_cmd_opcode){ 1549 if (status){ 1550 command_completed = 1; 1551 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1552 } else { 1553 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1554 } 1555 } else { 1556 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1557 } 1558 } 1559 1560 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1561 1562 // Vendor == CSR 1563 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1564 // TODO: track actual command 1565 command_completed = 1; 1566 } 1567 1568 // Vendor == Toshiba 1569 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1570 // TODO: track actual command 1571 command_completed = 1; 1572 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1573 hci_stack->num_cmd_packets = 1; 1574 } 1575 1576 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1577 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1578 // 1579 // HCI Reset 1580 // Timeout 100 ms 1581 // HCI Reset 1582 // Command Complete Reset 1583 // HCI Read Local Version Information 1584 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1585 // hang... 1586 // 1587 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1588 if (!command_completed 1589 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1590 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1591 1592 uint16_t opcode = little_endian_read_16(packet,3); 1593 if (opcode == hci_reset.opcode){ 1594 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1595 return; 1596 } 1597 } 1598 1599 // CSR & H5 1600 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1601 if (!command_completed 1602 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1603 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1604 1605 uint16_t opcode = little_endian_read_16(packet,3); 1606 if (opcode == hci_reset.opcode){ 1607 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1608 return; 1609 } 1610 } 1611 1612 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1613 // fix: Correct substate and behave as command below 1614 if (command_completed){ 1615 switch (hci_stack->substate){ 1616 case HCI_INIT_SEND_RESET: 1617 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1618 break; 1619 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1620 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1621 break; 1622 default: 1623 break; 1624 } 1625 } 1626 1627 #endif 1628 1629 if (!command_completed) return; 1630 1631 int need_baud_change = 0; 1632 int need_addr_change = 0; 1633 1634 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1635 need_baud_change = hci_stack->config 1636 && hci_stack->chipset 1637 && hci_stack->chipset->set_baudrate_command 1638 && hci_stack->hci_transport->set_baudrate 1639 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1640 1641 need_addr_change = hci_stack->custom_bd_addr_set 1642 && hci_stack->chipset 1643 && hci_stack->chipset->set_bd_addr_command; 1644 #endif 1645 1646 switch(hci_stack->substate){ 1647 1648 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1649 case HCI_INIT_SEND_RESET: 1650 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1651 // fix: just correct substate and behave as command below 1652 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1653 btstack_run_loop_remove_timer(&hci_stack->timeout); 1654 break; 1655 case HCI_INIT_W4_SEND_RESET: 1656 btstack_run_loop_remove_timer(&hci_stack->timeout); 1657 break; 1658 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1659 log_info("Received local name, need baud change %d", need_baud_change); 1660 if (need_baud_change){ 1661 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1662 return; 1663 } 1664 // skip baud change 1665 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1666 return; 1667 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1668 // for STLC2500D, baud rate change already happened. 1669 // for others, baud rate gets changed now 1670 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1671 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1672 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1673 hci_stack->hci_transport->set_baudrate(baud_rate); 1674 } 1675 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1676 return; 1677 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1678 btstack_run_loop_remove_timer(&hci_stack->timeout); 1679 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1680 return; 1681 case HCI_INIT_W4_CUSTOM_INIT: 1682 // repeat custom init 1683 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1684 return; 1685 #else 1686 case HCI_INIT_W4_SEND_RESET: 1687 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1688 return ; 1689 #endif 1690 1691 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1692 if (need_baud_change && hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT && 1693 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1694 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1695 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1696 return; 1697 } 1698 if (need_addr_change){ 1699 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1700 return; 1701 } 1702 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1703 return; 1704 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1705 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1706 if (need_baud_change){ 1707 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1708 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1709 hci_stack->hci_transport->set_baudrate(baud_rate); 1710 } 1711 if (need_addr_change){ 1712 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1713 return; 1714 } 1715 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1716 return; 1717 case HCI_INIT_W4_SET_BD_ADDR: 1718 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1719 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1720 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1721 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1722 return; 1723 } 1724 // skipping st warm boot 1725 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1726 return; 1727 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1728 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1729 return; 1730 #endif 1731 case HCI_INIT_W4_READ_BD_ADDR: 1732 // only read buffer size if supported 1733 if (hci_stack->local_supported_commands[0] & 0x01) { 1734 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1735 return; 1736 } 1737 // skipping read buffer size 1738 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1739 return; 1740 case HCI_INIT_W4_SET_EVENT_MASK: 1741 // skip Classic init commands for LE only chipsets 1742 if (!hci_classic_supported()){ 1743 #ifdef ENABLE_BLE 1744 if (hci_le_supported()){ 1745 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1746 return; 1747 } 1748 #endif 1749 log_error("Neither BR/EDR nor LE supported"); 1750 hci_init_done(); 1751 return; 1752 } 1753 if (!gap_ssp_supported()){ 1754 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1755 return; 1756 } 1757 break; 1758 #ifdef ENABLE_BLE 1759 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1760 // skip write le host if not supported (e.g. on LE only EM9301) 1761 if (hci_stack->local_supported_commands[0] & 0x02) break; 1762 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1763 return; 1764 1765 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1766 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1767 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1768 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1769 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1770 return; 1771 } 1772 // explicit fall through to reduce repetitions 1773 1774 #ifdef ENABLE_LE_CENTRAL 1775 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1776 #else 1777 hci_init_done(); 1778 #endif 1779 return; 1780 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1781 1782 #endif /* ENABLE_BLE */ 1783 1784 #ifdef ENABLE_SCO_OVER_HCI 1785 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1786 // skip write synchronous flow control if not supported 1787 if (hci_stack->local_supported_commands[0] & 0x04) break; 1788 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1789 // explicit fall through to reduce repetitions 1790 1791 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1792 // skip write default erroneous data reporting if not supported 1793 if (hci_stack->local_supported_commands[0] & 0x08) break; 1794 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1795 // explicit fall through to reduce repetitions 1796 1797 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1798 // skip bcm set sco pcm config on non-Broadcom chipsets 1799 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1800 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1801 // explicit fall through to reduce repetitions 1802 1803 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1804 if (!hci_le_supported()){ 1805 // SKIP LE init for Classic only configuration 1806 hci_init_done(); 1807 return; 1808 } 1809 break; 1810 1811 #else /* !ENABLE_SCO_OVER_HCI */ 1812 1813 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1814 #ifdef ENABLE_BLE 1815 if (hci_le_supported()){ 1816 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1817 return; 1818 } 1819 #endif 1820 // SKIP LE init for Classic only configuration 1821 hci_init_done(); 1822 return; 1823 #endif /* ENABLE_SCO_OVER_HCI */ 1824 1825 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1826 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1827 // Response to command before init done state -> init done 1828 case (HCI_INIT_DONE-1): 1829 hci_init_done(); 1830 return; 1831 #endif 1832 1833 default: 1834 break; 1835 } 1836 hci_initializing_next_state(); 1837 } 1838 1839 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1840 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1841 bd_addr_t bd_address; 1842 memcpy(&bd_address, conn->address, 6); 1843 1844 #ifdef ENABLE_CLASSIC 1845 // cache needed data 1846 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1847 #endif 1848 1849 // connection failed, remove entry 1850 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1851 btstack_memory_hci_connection_free( conn ); 1852 1853 #ifdef ENABLE_CLASSIC 1854 // notify client if dedicated bonding 1855 if (notify_dedicated_bonding_failed){ 1856 log_info("hci notify_dedicated_bonding_failed"); 1857 hci_emit_dedicated_bonding_result(bd_address, status); 1858 } 1859 1860 // if authentication error, also delete link key 1861 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1862 gap_drop_link_key_for_bd_addr(bd_address); 1863 } 1864 #endif 1865 } 1866 1867 static void event_handler(uint8_t *packet, int size){ 1868 1869 uint16_t event_length = packet[1]; 1870 1871 // assert packet is complete 1872 if (size != event_length + 2){ 1873 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1874 return; 1875 } 1876 1877 bd_addr_t addr; 1878 bd_addr_type_t addr_type; 1879 hci_con_handle_t handle; 1880 hci_connection_t * conn; 1881 int i; 1882 int create_connection_cmd; 1883 1884 #ifdef ENABLE_CLASSIC 1885 uint8_t link_type; 1886 #endif 1887 1888 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1889 1890 switch (hci_event_packet_get_type(packet)) { 1891 1892 case HCI_EVENT_COMMAND_COMPLETE: 1893 // get num cmd packets - limit to 1 to reduce complexity 1894 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1895 1896 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1897 if (packet[5]) break; 1898 // terminate, name 248 chars 1899 packet[6+248] = 0; 1900 log_info("local name: %s", &packet[6]); 1901 } 1902 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1903 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1904 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1905 uint16_t acl_len = little_endian_read_16(packet, 6); 1906 uint16_t sco_len = packet[8]; 1907 1908 // determine usable ACL/SCO payload size 1909 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1910 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1911 1912 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1913 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1914 1915 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1916 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1917 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1918 } 1919 } 1920 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_rssi)){ 1921 if (packet[5] == 0){ 1922 uint8_t event[5]; 1923 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 1924 event[1] = 3; 1925 memcpy(&event[2], &packet[6], 3); 1926 hci_emit_event(event, sizeof(event), 1); 1927 } 1928 } 1929 #ifdef ENABLE_BLE 1930 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1931 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1932 hci_stack->le_acl_packets_total_num = packet[8]; 1933 // determine usable ACL payload size 1934 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1935 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1936 } 1937 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1938 } 1939 #endif 1940 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1941 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1942 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1943 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1944 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); 1945 } 1946 #endif 1947 #ifdef ENABLE_LE_CENTRAL 1948 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1949 hci_stack->le_whitelist_capacity = packet[6]; 1950 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1951 } 1952 #endif 1953 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1954 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1955 hci_stack->local_bd_addr); 1956 log_info("Local Address, Status: 0x%02x: Addr: %s", 1957 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1958 #ifdef ENABLE_CLASSIC 1959 if (hci_stack->link_key_db){ 1960 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1961 } 1962 #endif 1963 } 1964 #ifdef ENABLE_CLASSIC 1965 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1966 hci_emit_discoverable_enabled(hci_stack->discoverable); 1967 } 1968 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1969 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1970 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1971 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1972 hci_emit_event(event, sizeof(event), 1); 1973 } 1974 } 1975 #endif 1976 1977 // Note: HCI init checks 1978 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1979 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1980 1981 #ifdef ENABLE_CLASSIC 1982 // determine usable ACL packet types based on host buffer size and supported features 1983 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1984 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1985 #endif 1986 // Classic/LE 1987 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1988 } 1989 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1990 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1991 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1992 uint16_t manufacturer = little_endian_read_16(packet, 10); 1993 // map Cypress to Broadcom 1994 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 1995 log_info("Treat Cypress as Broadcom"); 1996 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 1997 little_endian_store_16(packet, 10, manufacturer); 1998 } 1999 hci_stack->manufacturer = manufacturer; 2000 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 2001 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 2002 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2003 } 2004 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 2005 hci_stack->local_supported_commands[0] = 2006 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2007 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2008 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2009 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2010 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2011 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2 | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2012 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1; // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2013 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 2014 } 2015 #ifdef ENABLE_CLASSIC 2016 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 2017 if (packet[5] == 0){ 2018 hci_stack->synchronous_flow_control_enabled = 1; 2019 } 2020 } 2021 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_encryption_key_size)){ 2022 uint8_t status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2023 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2024 conn = hci_connection_for_handle(handle); 2025 if (!conn) break; 2026 if (status == 0){ 2027 uint8_t key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2028 log_info("Handle %x04x key Size: %u", handle, key_size); 2029 conn->encryption_key_size = key_size; 2030 } else { 2031 log_info("Read Encryption Key Size failed -> assuming insecure connection with key size of 1"); 2032 conn->encryption_key_size = 1; 2033 } 2034 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2035 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2036 } 2037 #endif 2038 break; 2039 2040 case HCI_EVENT_COMMAND_STATUS: 2041 // get num cmd packets - limit to 1 to reduce complexity 2042 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2043 2044 // check command status to detected failed outgoing connections 2045 create_connection_cmd = 0; 2046 #ifdef ENABLE_CLASSIC 2047 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2048 create_connection_cmd = 1; 2049 } 2050 #endif 2051 #ifdef ENABLE_LE_CENTRAL 2052 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2053 create_connection_cmd = 1; 2054 } 2055 #endif 2056 if (create_connection_cmd) { 2057 uint8_t status = hci_event_command_status_get_status(packet); 2058 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2059 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); 2060 2061 // reset outgoing address info 2062 memset(hci_stack->outgoing_addr, 0, 6); 2063 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2064 2065 // error => outgoing connection failed 2066 if ((conn != NULL) && (status != 0)){ 2067 hci_handle_connection_failed(conn, status); 2068 } 2069 } 2070 break; 2071 2072 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2073 int offset = 3; 2074 for (i=0; i<packet[2];i++){ 2075 handle = little_endian_read_16(packet, offset) & 0x0fff; 2076 offset += 2; 2077 uint16_t num_packets = little_endian_read_16(packet, offset); 2078 offset += 2; 2079 2080 conn = hci_connection_for_handle(handle); 2081 if (!conn){ 2082 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2083 continue; 2084 } 2085 2086 if (conn->num_packets_sent >= num_packets){ 2087 conn->num_packets_sent -= num_packets; 2088 } else { 2089 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2090 conn->num_packets_sent = 0; 2091 } 2092 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2093 2094 #ifdef ENABLE_CLASSIC 2095 // For SCO, we do the can_send_now_check here 2096 hci_notify_if_sco_can_send_now(); 2097 #endif 2098 } 2099 break; 2100 } 2101 2102 #ifdef ENABLE_CLASSIC 2103 case HCI_EVENT_INQUIRY_COMPLETE: 2104 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2105 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2106 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2107 hci_emit_event(event, sizeof(event), 1); 2108 } 2109 break; 2110 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2111 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2112 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2113 } 2114 break; 2115 case HCI_EVENT_CONNECTION_REQUEST: 2116 reverse_bd_addr(&packet[2], addr); 2117 if (hci_stack->gap_classic_accept_callback != NULL){ 2118 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2119 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2120 bd_addr_copy(hci_stack->decline_addr, addr); 2121 break; 2122 } 2123 } 2124 2125 // TODO: eval COD 8-10 2126 link_type = packet[11]; 2127 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2128 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 2129 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2130 if (!conn) { 2131 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2132 } 2133 if (!conn) { 2134 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2135 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2136 bd_addr_copy(hci_stack->decline_addr, addr); 2137 break; 2138 } 2139 conn->role = HCI_ROLE_SLAVE; 2140 conn->state = RECEIVED_CONNECTION_REQUEST; 2141 // store info about eSCO 2142 if (link_type == 0x02){ 2143 conn->remote_supported_feature_eSCO = 1; 2144 } 2145 hci_run(); 2146 break; 2147 2148 case HCI_EVENT_CONNECTION_COMPLETE: 2149 // Connection management 2150 reverse_bd_addr(&packet[5], addr); 2151 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2152 addr_type = BD_ADDR_TYPE_CLASSIC; 2153 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2154 if (conn) { 2155 if (!packet[2]){ 2156 conn->state = OPEN; 2157 conn->con_handle = little_endian_read_16(packet, 3); 2158 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2159 2160 // restart timer 2161 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2162 btstack_run_loop_add_timer(&conn->timeout); 2163 2164 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2165 2166 hci_emit_nr_connections_changed(); 2167 } else { 2168 // connection failed 2169 hci_handle_connection_failed(conn, packet[2]); 2170 } 2171 } 2172 break; 2173 2174 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2175 reverse_bd_addr(&packet[5], addr); 2176 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2177 if (packet[2]){ 2178 // connection failed 2179 break; 2180 } 2181 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2182 if (!conn) { 2183 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2184 } 2185 if (!conn) { 2186 break; 2187 } 2188 conn->state = OPEN; 2189 conn->con_handle = little_endian_read_16(packet, 3); 2190 2191 #ifdef ENABLE_SCO_OVER_HCI 2192 // update SCO 2193 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2194 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2195 } 2196 // trigger can send now 2197 if (hci_have_usb_transport()){ 2198 hci_stack->sco_can_send_now = 1; 2199 } 2200 #endif 2201 break; 2202 2203 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2204 handle = little_endian_read_16(packet, 3); 2205 conn = hci_connection_for_handle(handle); 2206 if (!conn) break; 2207 if (!packet[2]){ 2208 uint8_t * features = &packet[5]; 2209 if (features[6] & (1 << 3)){ 2210 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2211 } 2212 if (features[3] & (1<<7)){ 2213 conn->remote_supported_feature_eSCO = 1; 2214 } 2215 } 2216 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2217 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2218 if (conn->bonding_flags & BONDING_DEDICATED){ 2219 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2220 } 2221 break; 2222 2223 case HCI_EVENT_LINK_KEY_REQUEST: 2224 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2225 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2226 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2227 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2228 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2229 hci_run(); 2230 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2231 return; 2232 2233 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2234 reverse_bd_addr(&packet[2], addr); 2235 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2236 if (!conn) break; 2237 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2238 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2239 // Change Connection Encryption keeps link key type 2240 if (link_key_type != CHANGED_COMBINATION_KEY){ 2241 conn->link_key_type = link_key_type; 2242 } 2243 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2244 // still forward event to allow dismiss of pairing dialog 2245 break; 2246 } 2247 2248 case HCI_EVENT_PIN_CODE_REQUEST: 2249 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2250 // non-bondable mode: pin code negative reply will be sent 2251 if (!hci_stack->bondable){ 2252 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2253 hci_run(); 2254 return; 2255 } 2256 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2257 if (!hci_stack->link_key_db) break; 2258 hci_event_pin_code_request_get_bd_addr(packet, addr); 2259 hci_stack->link_key_db->delete_link_key(addr); 2260 break; 2261 2262 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2263 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2264 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2265 break; 2266 2267 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2268 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2269 if (!hci_stack->ssp_auto_accept) break; 2270 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2271 break; 2272 2273 case HCI_EVENT_USER_PASSKEY_REQUEST: 2274 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2275 if (!hci_stack->ssp_auto_accept) break; 2276 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2277 break; 2278 case HCI_EVENT_MODE_CHANGE: 2279 handle = hci_event_mode_change_get_handle(packet); 2280 conn = hci_connection_for_handle(handle); 2281 if (!conn) break; 2282 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2283 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2284 break; 2285 #endif 2286 2287 case HCI_EVENT_ENCRYPTION_CHANGE: 2288 handle = little_endian_read_16(packet, 3); 2289 conn = hci_connection_for_handle(handle); 2290 if (!conn) break; 2291 if (packet[2] == 0) { 2292 if (packet[5]){ 2293 if (hci_is_le_connection(conn)){ 2294 // For LE, we accept connection as encrypted 2295 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2296 } 2297 #ifdef ENABLE_CLASSIC 2298 else { 2299 // For Classic, we need to validate encryption key size first 2300 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2301 } 2302 #endif 2303 } else { 2304 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2305 } 2306 } 2307 2308 break; 2309 2310 #ifdef ENABLE_CLASSIC 2311 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2312 handle = little_endian_read_16(packet, 3); 2313 conn = hci_connection_for_handle(handle); 2314 if (!conn) break; 2315 2316 // dedicated bonding: send result and disconnect 2317 if (conn->bonding_flags & BONDING_DEDICATED){ 2318 conn->bonding_flags &= ~BONDING_DEDICATED; 2319 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2320 conn->bonding_status = packet[2]; 2321 break; 2322 } 2323 2324 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2325 // link key sufficient for requested security 2326 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2327 break; 2328 } 2329 // not enough 2330 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2331 break; 2332 #endif 2333 2334 // HCI_EVENT_DISCONNECTION_COMPLETE 2335 // has been split, to first notify stack before shutting connection down 2336 // see end of function, too. 2337 case HCI_EVENT_DISCONNECTION_COMPLETE: 2338 if (packet[2]) break; // status != 0 2339 handle = little_endian_read_16(packet, 3); 2340 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2341 if (hci_stack->acl_fragmentation_total_size > 0) { 2342 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2343 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2344 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2345 hci_stack->acl_fragmentation_total_size = 0; 2346 hci_stack->acl_fragmentation_pos = 0; 2347 if (release_buffer){ 2348 hci_release_packet_buffer(); 2349 } 2350 } 2351 } 2352 2353 // re-enable advertisements for le connections if active 2354 conn = hci_connection_for_handle(handle); 2355 if (!conn) break; 2356 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2357 #ifdef ENABLE_BLE 2358 #ifdef ENABLE_LE_PERIPHERAL 2359 if (hci_is_le_connection(conn)){ 2360 hci_reenable_advertisements_if_needed(); 2361 } 2362 #endif 2363 #endif 2364 break; 2365 2366 case HCI_EVENT_HARDWARE_ERROR: 2367 log_error("Hardware Error: 0x%02x", packet[2]); 2368 if (hci_stack->hardware_error_callback){ 2369 (*hci_stack->hardware_error_callback)(packet[2]); 2370 } else { 2371 // if no special requests, just reboot stack 2372 hci_power_control_off(); 2373 hci_power_control_on(); 2374 } 2375 break; 2376 2377 #ifdef ENABLE_CLASSIC 2378 case HCI_EVENT_ROLE_CHANGE: 2379 if (packet[2]) break; // status != 0 2380 reverse_bd_addr(&packet[3], addr); 2381 addr_type = BD_ADDR_TYPE_CLASSIC; 2382 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2383 if (!conn) break; 2384 conn->role = packet[9]; 2385 break; 2386 #endif 2387 2388 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2389 // release packet buffer only for asynchronous transport and if there are not further fragements 2390 if (hci_transport_synchronous()) { 2391 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2392 return; // instead of break: to avoid re-entering hci_run() 2393 } 2394 hci_stack->acl_fragmentation_tx_active = 0; 2395 if (hci_stack->acl_fragmentation_total_size) break; 2396 hci_release_packet_buffer(); 2397 2398 // L2CAP receives this event via the hci_emit_event below 2399 2400 #ifdef ENABLE_CLASSIC 2401 // For SCO, we do the can_send_now_check here 2402 hci_notify_if_sco_can_send_now(); 2403 #endif 2404 break; 2405 2406 #ifdef ENABLE_CLASSIC 2407 case HCI_EVENT_SCO_CAN_SEND_NOW: 2408 // For SCO, we do the can_send_now_check here 2409 hci_stack->sco_can_send_now = 1; 2410 hci_notify_if_sco_can_send_now(); 2411 return; 2412 2413 // explode inquriy results for easier consumption 2414 case HCI_EVENT_INQUIRY_RESULT: 2415 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2416 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2417 gap_inquiry_explode(packet); 2418 break; 2419 #endif 2420 2421 #ifdef ENABLE_BLE 2422 case HCI_EVENT_LE_META: 2423 switch (packet[2]){ 2424 #ifdef ENABLE_LE_CENTRAL 2425 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2426 // log_info("advertising report received"); 2427 if (!hci_stack->le_scanning_enabled) break; 2428 le_handle_advertisement_report(packet, size); 2429 break; 2430 #endif 2431 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2432 // Connection management 2433 reverse_bd_addr(&packet[8], addr); 2434 addr_type = (bd_addr_type_t)packet[7]; 2435 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2436 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2437 2438 #ifdef ENABLE_LE_CENTRAL 2439 // if auto-connect, remove from whitelist in both roles 2440 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2441 hci_remove_from_whitelist(addr_type, addr); 2442 } 2443 // handle error: error is reported only to the initiator -> outgoing connection 2444 if (packet[3]){ 2445 2446 // handle cancelled outgoing connection 2447 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2448 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2449 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2450 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2451 conn = gap_get_outgoing_connection(); 2452 } 2453 2454 // outgoing connection establishment is done 2455 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2456 // remove entry 2457 if (conn){ 2458 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2459 btstack_memory_hci_connection_free( conn ); 2460 } 2461 break; 2462 } 2463 #endif 2464 // on success, both hosts receive connection complete event 2465 if (packet[6] == HCI_ROLE_MASTER){ 2466 #ifdef ENABLE_LE_CENTRAL 2467 // if we're master, it was an outgoing connection and we're done with it 2468 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2469 #endif 2470 } else { 2471 #ifdef ENABLE_LE_PERIPHERAL 2472 // if we're slave, it was an incoming connection, advertisements have stopped 2473 hci_stack->le_advertisements_active = 0; 2474 #endif 2475 } 2476 // LE connections are auto-accepted, so just create a connection if there isn't one already 2477 if (!conn){ 2478 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2479 } 2480 // no memory, sorry. 2481 if (!conn){ 2482 break; 2483 } 2484 2485 conn->state = OPEN; 2486 conn->role = packet[6]; 2487 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2488 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2489 2490 #ifdef ENABLE_LE_PERIPHERAL 2491 if (packet[6] == HCI_ROLE_SLAVE){ 2492 hci_reenable_advertisements_if_needed(); 2493 } 2494 #endif 2495 2496 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2497 2498 // restart timer 2499 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2500 // btstack_run_loop_add_timer(&conn->timeout); 2501 2502 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2503 2504 hci_emit_nr_connections_changed(); 2505 break; 2506 2507 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2508 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2509 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2510 conn = hci_connection_for_handle(handle); 2511 if (!conn) break; 2512 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2513 break; 2514 2515 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2516 // connection 2517 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2518 conn = hci_connection_for_handle(handle); 2519 if (conn) { 2520 // read arguments 2521 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2522 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2523 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2524 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2525 2526 // validate against current connection parameter range 2527 le_connection_parameter_range_t existing_range; 2528 gap_get_connection_parameter_range(&existing_range); 2529 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2530 if (update_parameter){ 2531 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2532 conn->le_conn_interval_min = le_conn_interval_min; 2533 conn->le_conn_interval_max = le_conn_interval_max; 2534 conn->le_conn_latency = le_conn_latency; 2535 conn->le_supervision_timeout = le_supervision_timeout; 2536 } else { 2537 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2538 } 2539 } 2540 break; 2541 default: 2542 break; 2543 } 2544 break; 2545 #endif 2546 case HCI_EVENT_VENDOR_SPECIFIC: 2547 // Vendor specific commands often create vendor specific event instead of num completed packets 2548 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2549 switch (hci_stack->manufacturer){ 2550 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2551 hci_stack->num_cmd_packets = 1; 2552 break; 2553 default: 2554 break; 2555 } 2556 break; 2557 default: 2558 break; 2559 } 2560 2561 // handle BT initialization 2562 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2563 hci_initializing_event_handler(packet, size); 2564 } 2565 2566 // help with BT sleep 2567 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2568 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2569 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2570 hci_initializing_next_state(); 2571 } 2572 2573 // notify upper stack 2574 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2575 2576 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2577 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2578 if (!packet[2]){ 2579 handle = little_endian_read_16(packet, 3); 2580 hci_connection_t * aConn = hci_connection_for_handle(handle); 2581 if (aConn) { 2582 uint8_t status = aConn->bonding_status; 2583 uint16_t flags = aConn->bonding_flags; 2584 bd_addr_t bd_address; 2585 memcpy(&bd_address, aConn->address, 6); 2586 hci_shutdown_connection(aConn); 2587 // connection struct is gone, don't access anymore 2588 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2589 hci_emit_dedicated_bonding_result(bd_address, status); 2590 } 2591 } 2592 } 2593 } 2594 2595 // execute main loop 2596 hci_run(); 2597 } 2598 2599 #ifdef ENABLE_CLASSIC 2600 2601 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2602 static void sco_schedule_tx(hci_connection_t * conn); 2603 2604 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2605 log_debug("SCO TX Timeout"); 2606 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2607 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2608 if (!conn) return; 2609 2610 // trigger send 2611 conn->sco_tx_ready = 1; 2612 // extra packet if CVSD but SCO buffer is too short 2613 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && hci_stack->sco_data_packet_length < 123){ 2614 conn->sco_tx_ready++; 2615 } 2616 hci_notify_if_sco_can_send_now(); 2617 } 2618 2619 2620 #define SCO_TX_AFTER_RX_MS (6) 2621 2622 static void sco_schedule_tx(hci_connection_t * conn){ 2623 2624 uint32_t now = btstack_run_loop_get_time_ms(); 2625 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2626 int time_delta_ms = sco_tx_ms - now; 2627 2628 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2629 2630 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2631 btstack_run_loop_set_timer(timer, time_delta_ms); 2632 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2633 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2634 btstack_run_loop_add_timer(timer); 2635 } 2636 2637 static void sco_handler(uint8_t * packet, uint16_t size){ 2638 // lookup connection struct 2639 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2640 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2641 if (!conn) return; 2642 2643 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2644 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2645 if (size == 83 && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2646 packet[2] = 0x3c; 2647 memmove(&packet[3], &packet[23], 63); 2648 size = 63; 2649 } 2650 } 2651 2652 if (hci_have_usb_transport()){ 2653 // Nothing to do 2654 } else { 2655 // log_debug("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); 2656 if (hci_stack->synchronous_flow_control_enabled == 0){ 2657 uint32_t now = btstack_run_loop_get_time_ms(); 2658 2659 if (!conn->sco_rx_valid){ 2660 // ignore first 10 packets 2661 conn->sco_rx_count++; 2662 // log_debug("sco rx count %u", conn->sco_rx_count); 2663 if (conn->sco_rx_count == 10) { 2664 // use first timestamp as is and pretent it just started 2665 conn->sco_rx_ms = now; 2666 conn->sco_rx_valid = 1; 2667 conn->sco_rx_count = 0; 2668 sco_schedule_tx(conn); 2669 } 2670 } else { 2671 // track expected arrival timme 2672 conn->sco_rx_count++; 2673 conn->sco_rx_ms += 7; 2674 int delta = (int32_t) (now - conn->sco_rx_ms); 2675 if (delta > 0){ 2676 conn->sco_rx_ms++; 2677 } 2678 // log_debug("sco rx %u", conn->sco_rx_ms); 2679 sco_schedule_tx(conn); 2680 } 2681 } 2682 } 2683 // deliver to app 2684 if (hci_stack->sco_packet_handler) { 2685 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2686 } 2687 2688 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2689 conn->num_packets_completed++; 2690 hci_stack->host_completed_packets = 1; 2691 hci_run(); 2692 #endif 2693 } 2694 #endif 2695 2696 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2697 hci_dump_packet(packet_type, 1, packet, size); 2698 switch (packet_type) { 2699 case HCI_EVENT_PACKET: 2700 event_handler(packet, size); 2701 break; 2702 case HCI_ACL_DATA_PACKET: 2703 acl_handler(packet, size); 2704 break; 2705 #ifdef ENABLE_CLASSIC 2706 case HCI_SCO_DATA_PACKET: 2707 sco_handler(packet, size); 2708 break; 2709 #endif 2710 default: 2711 break; 2712 } 2713 } 2714 2715 /** 2716 * @brief Add event packet handler. 2717 */ 2718 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2719 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2720 } 2721 2722 2723 /** Register HCI packet handlers */ 2724 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2725 hci_stack->acl_packet_handler = handler; 2726 } 2727 2728 #ifdef ENABLE_CLASSIC 2729 /** 2730 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2731 */ 2732 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2733 hci_stack->sco_packet_handler = handler; 2734 } 2735 #endif 2736 2737 static void hci_state_reset(void){ 2738 // no connections yet 2739 hci_stack->connections = NULL; 2740 2741 // keep discoverable/connectable as this has been requested by the client(s) 2742 // hci_stack->discoverable = 0; 2743 // hci_stack->connectable = 0; 2744 // hci_stack->bondable = 1; 2745 // hci_stack->own_addr_type = 0; 2746 2747 // buffer is free 2748 hci_stack->hci_packet_buffer_reserved = 0; 2749 2750 // no pending cmds 2751 hci_stack->decline_reason = 0; 2752 hci_stack->new_scan_enable_value = 0xff; 2753 2754 // LE 2755 #ifdef ENABLE_BLE 2756 memset(hci_stack->le_random_address, 0, 6); 2757 hci_stack->le_random_address_set = 0; 2758 #endif 2759 #ifdef ENABLE_LE_CENTRAL 2760 hci_stack->le_scanning_active = 0; 2761 hci_stack->le_scan_type = 0xff; 2762 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2763 hci_stack->le_whitelist = 0; 2764 hci_stack->le_whitelist_capacity = 0; 2765 #endif 2766 } 2767 2768 #ifdef ENABLE_CLASSIC 2769 /** 2770 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2771 */ 2772 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2773 // store and open remote device db 2774 hci_stack->link_key_db = link_key_db; 2775 if (hci_stack->link_key_db) { 2776 hci_stack->link_key_db->open(); 2777 } 2778 } 2779 #endif 2780 2781 void hci_init(const hci_transport_t *transport, const void *config){ 2782 2783 #ifdef HAVE_MALLOC 2784 if (!hci_stack) { 2785 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2786 } 2787 #else 2788 hci_stack = &hci_stack_static; 2789 #endif 2790 memset(hci_stack, 0, sizeof(hci_stack_t)); 2791 2792 // reference to use transport layer implementation 2793 hci_stack->hci_transport = transport; 2794 2795 // reference to used config 2796 hci_stack->config = config; 2797 2798 // setup pointer for outgoing packet buffer 2799 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2800 2801 // max acl payload size defined in config.h 2802 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2803 2804 // register packet handlers with transport 2805 transport->register_packet_handler(&packet_handler); 2806 2807 hci_stack->state = HCI_STATE_OFF; 2808 2809 // class of device 2810 hci_stack->class_of_device = 0x007a020c; // Smartphone 2811 2812 // bondable by default 2813 hci_stack->bondable = 1; 2814 2815 #ifdef ENABLE_CLASSIC 2816 // classic name 2817 hci_stack->local_name = default_classic_name; 2818 2819 // Master slave policy 2820 hci_stack->master_slave_policy = 1; 2821 2822 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3, we use 16 as default 2823 hci_stack->gap_required_encyrption_key_size = 16; 2824 #endif 2825 2826 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2827 hci_stack->ssp_enable = 1; 2828 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2829 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2830 hci_stack->ssp_auto_accept = 1; 2831 2832 // voice setting - signed 16 bit pcm data with CVSD over the air 2833 hci_stack->sco_voice_setting = 0x60; 2834 2835 #ifdef ENABLE_LE_CENTRAL 2836 // connection parameter to use for outgoing connections 2837 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2838 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2839 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2840 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2841 hci_stack->le_connection_latency = 4; // 4 2842 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2843 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2844 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2845 2846 // default LE Scanning 2847 hci_stack->le_scan_interval = 0x1e0; 2848 hci_stack->le_scan_window = 0x30; 2849 #endif 2850 2851 #ifdef ENABLE_LE_PERIPHERAL 2852 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2853 #endif 2854 2855 // connection parameter range used to answer connection parameter update requests in l2cap 2856 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2857 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2858 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2859 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2860 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2861 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2862 2863 hci_state_reset(); 2864 } 2865 2866 /** 2867 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2868 */ 2869 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2870 hci_stack->chipset = chipset_driver; 2871 2872 // reset chipset driver - init is also called on power_up 2873 if (hci_stack->chipset && hci_stack->chipset->init){ 2874 hci_stack->chipset->init(hci_stack->config); 2875 } 2876 } 2877 2878 /** 2879 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2880 */ 2881 void hci_set_control(const btstack_control_t *hardware_control){ 2882 // references to used control implementation 2883 hci_stack->control = hardware_control; 2884 // init with transport config 2885 hardware_control->init(hci_stack->config); 2886 } 2887 2888 void hci_close(void){ 2889 // close remote device db 2890 if (hci_stack->link_key_db) { 2891 hci_stack->link_key_db->close(); 2892 } 2893 2894 btstack_linked_list_iterator_t lit; 2895 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2896 while (btstack_linked_list_iterator_has_next(&lit)){ 2897 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2898 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2899 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2900 hci_shutdown_connection(connection); 2901 } 2902 2903 hci_power_control(HCI_POWER_OFF); 2904 2905 #ifdef HAVE_MALLOC 2906 free(hci_stack); 2907 #endif 2908 hci_stack = NULL; 2909 } 2910 2911 #ifdef ENABLE_CLASSIC 2912 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 2913 // validate ranage and set 2914 if (encryption_key_size < 7) return; 2915 if (encryption_key_size > 16) return; 2916 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 2917 } 2918 #endif 2919 2920 #ifdef ENABLE_CLASSIC 2921 void gap_set_class_of_device(uint32_t class_of_device){ 2922 hci_stack->class_of_device = class_of_device; 2923 } 2924 2925 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 2926 hci_stack->default_link_policy_settings = default_link_policy_settings; 2927 } 2928 2929 void hci_disable_l2cap_timeout_check(void){ 2930 disable_l2cap_timeouts = 1; 2931 } 2932 #endif 2933 2934 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2935 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2936 void hci_set_bd_addr(bd_addr_t addr){ 2937 memcpy(hci_stack->custom_bd_addr, addr, 6); 2938 hci_stack->custom_bd_addr_set = 1; 2939 } 2940 #endif 2941 2942 // State-Module-Driver overview 2943 // state module low-level 2944 // HCI_STATE_OFF off close 2945 // HCI_STATE_INITIALIZING, on open 2946 // HCI_STATE_WORKING, on open 2947 // HCI_STATE_HALTING, on open 2948 // HCI_STATE_SLEEPING, off/sleep close 2949 // HCI_STATE_FALLING_ASLEEP on open 2950 2951 static int hci_power_control_on(void){ 2952 2953 // power on 2954 int err = 0; 2955 if (hci_stack->control && hci_stack->control->on){ 2956 err = (*hci_stack->control->on)(); 2957 } 2958 if (err){ 2959 log_error( "POWER_ON failed"); 2960 hci_emit_hci_open_failed(); 2961 return err; 2962 } 2963 2964 // int chipset driver 2965 if (hci_stack->chipset && hci_stack->chipset->init){ 2966 hci_stack->chipset->init(hci_stack->config); 2967 } 2968 2969 // init transport 2970 if (hci_stack->hci_transport->init){ 2971 hci_stack->hci_transport->init(hci_stack->config); 2972 } 2973 2974 // open transport 2975 err = hci_stack->hci_transport->open(); 2976 if (err){ 2977 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2978 if (hci_stack->control && hci_stack->control->off){ 2979 (*hci_stack->control->off)(); 2980 } 2981 hci_emit_hci_open_failed(); 2982 return err; 2983 } 2984 return 0; 2985 } 2986 2987 static void hci_power_control_off(void){ 2988 2989 log_info("hci_power_control_off"); 2990 2991 // close low-level device 2992 hci_stack->hci_transport->close(); 2993 2994 log_info("hci_power_control_off - hci_transport closed"); 2995 2996 // power off 2997 if (hci_stack->control && hci_stack->control->off){ 2998 (*hci_stack->control->off)(); 2999 } 3000 3001 log_info("hci_power_control_off - control closed"); 3002 3003 hci_stack->state = HCI_STATE_OFF; 3004 } 3005 3006 static void hci_power_control_sleep(void){ 3007 3008 log_info("hci_power_control_sleep"); 3009 3010 #if 0 3011 // don't close serial port during sleep 3012 3013 // close low-level device 3014 hci_stack->hci_transport->close(hci_stack->config); 3015 #endif 3016 3017 // sleep mode 3018 if (hci_stack->control && hci_stack->control->sleep){ 3019 (*hci_stack->control->sleep)(); 3020 } 3021 3022 hci_stack->state = HCI_STATE_SLEEPING; 3023 } 3024 3025 static int hci_power_control_wake(void){ 3026 3027 log_info("hci_power_control_wake"); 3028 3029 // wake on 3030 if (hci_stack->control && hci_stack->control->wake){ 3031 (*hci_stack->control->wake)(); 3032 } 3033 3034 #if 0 3035 // open low-level device 3036 int err = hci_stack->hci_transport->open(hci_stack->config); 3037 if (err){ 3038 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3039 if (hci_stack->control && hci_stack->control->off){ 3040 (*hci_stack->control->off)(); 3041 } 3042 hci_emit_hci_open_failed(); 3043 return err; 3044 } 3045 #endif 3046 3047 return 0; 3048 } 3049 3050 static void hci_power_transition_to_initializing(void){ 3051 // set up state machine 3052 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3053 hci_stack->hci_packet_buffer_reserved = 0; 3054 hci_stack->state = HCI_STATE_INITIALIZING; 3055 hci_stack->substate = HCI_INIT_SEND_RESET; 3056 } 3057 3058 int hci_power_control(HCI_POWER_MODE power_mode){ 3059 3060 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3061 3062 int err = 0; 3063 switch (hci_stack->state){ 3064 3065 case HCI_STATE_OFF: 3066 switch (power_mode){ 3067 case HCI_POWER_ON: 3068 err = hci_power_control_on(); 3069 if (err) { 3070 log_error("hci_power_control_on() error %d", err); 3071 return err; 3072 } 3073 hci_power_transition_to_initializing(); 3074 break; 3075 case HCI_POWER_OFF: 3076 // do nothing 3077 break; 3078 case HCI_POWER_SLEEP: 3079 // do nothing (with SLEEP == OFF) 3080 break; 3081 } 3082 break; 3083 3084 case HCI_STATE_INITIALIZING: 3085 switch (power_mode){ 3086 case HCI_POWER_ON: 3087 // do nothing 3088 break; 3089 case HCI_POWER_OFF: 3090 // no connections yet, just turn it off 3091 hci_power_control_off(); 3092 break; 3093 case HCI_POWER_SLEEP: 3094 // no connections yet, just turn it off 3095 hci_power_control_sleep(); 3096 break; 3097 } 3098 break; 3099 3100 case HCI_STATE_WORKING: 3101 switch (power_mode){ 3102 case HCI_POWER_ON: 3103 // do nothing 3104 break; 3105 case HCI_POWER_OFF: 3106 // see hci_run 3107 hci_stack->state = HCI_STATE_HALTING; 3108 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3109 break; 3110 case HCI_POWER_SLEEP: 3111 // see hci_run 3112 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3113 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3114 break; 3115 } 3116 break; 3117 3118 case HCI_STATE_HALTING: 3119 switch (power_mode){ 3120 case HCI_POWER_ON: 3121 hci_power_transition_to_initializing(); 3122 break; 3123 case HCI_POWER_OFF: 3124 // do nothing 3125 break; 3126 case HCI_POWER_SLEEP: 3127 // see hci_run 3128 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3129 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3130 break; 3131 } 3132 break; 3133 3134 case HCI_STATE_FALLING_ASLEEP: 3135 switch (power_mode){ 3136 case HCI_POWER_ON: 3137 3138 #ifdef HAVE_PLATFORM_IPHONE_OS 3139 // nothing to do, if H4 supports power management 3140 if (btstack_control_iphone_power_management_enabled()){ 3141 hci_stack->state = HCI_STATE_INITIALIZING; 3142 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3143 break; 3144 } 3145 #endif 3146 hci_power_transition_to_initializing(); 3147 break; 3148 case HCI_POWER_OFF: 3149 // see hci_run 3150 hci_stack->state = HCI_STATE_HALTING; 3151 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3152 break; 3153 case HCI_POWER_SLEEP: 3154 // do nothing 3155 break; 3156 } 3157 break; 3158 3159 case HCI_STATE_SLEEPING: 3160 switch (power_mode){ 3161 case HCI_POWER_ON: 3162 3163 #ifdef HAVE_PLATFORM_IPHONE_OS 3164 // nothing to do, if H4 supports power management 3165 if (btstack_control_iphone_power_management_enabled()){ 3166 hci_stack->state = HCI_STATE_INITIALIZING; 3167 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3168 hci_update_scan_enable(); 3169 break; 3170 } 3171 #endif 3172 err = hci_power_control_wake(); 3173 if (err) return err; 3174 hci_power_transition_to_initializing(); 3175 break; 3176 case HCI_POWER_OFF: 3177 hci_stack->state = HCI_STATE_HALTING; 3178 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3179 break; 3180 case HCI_POWER_SLEEP: 3181 // do nothing 3182 break; 3183 } 3184 break; 3185 } 3186 3187 // create internal event 3188 hci_emit_state(); 3189 3190 // trigger next/first action 3191 hci_run(); 3192 3193 return 0; 3194 } 3195 3196 3197 #ifdef ENABLE_CLASSIC 3198 3199 static void hci_update_scan_enable(void){ 3200 // 2 = page scan, 1 = inq scan 3201 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 3202 hci_run(); 3203 } 3204 3205 void gap_discoverable_control(uint8_t enable){ 3206 if (enable) enable = 1; // normalize argument 3207 3208 if (hci_stack->discoverable == enable){ 3209 hci_emit_discoverable_enabled(hci_stack->discoverable); 3210 return; 3211 } 3212 3213 hci_stack->discoverable = enable; 3214 hci_update_scan_enable(); 3215 } 3216 3217 void gap_connectable_control(uint8_t enable){ 3218 if (enable) enable = 1; // normalize argument 3219 3220 // don't emit event 3221 if (hci_stack->connectable == enable) return; 3222 3223 hci_stack->connectable = enable; 3224 hci_update_scan_enable(); 3225 } 3226 #endif 3227 3228 void gap_local_bd_addr(bd_addr_t address_buffer){ 3229 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3230 } 3231 3232 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3233 static void hci_host_num_completed_packets(void){ 3234 3235 // create packet manually as arrays are not supported and num_commands should not get reduced 3236 hci_reserve_packet_buffer(); 3237 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3238 3239 uint16_t size = 0; 3240 uint16_t num_handles = 0; 3241 packet[size++] = 0x35; 3242 packet[size++] = 0x0c; 3243 size++; // skip param len 3244 size++; // skip num handles 3245 3246 // add { handle, packets } entries 3247 btstack_linked_item_t * it; 3248 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3249 hci_connection_t * connection = (hci_connection_t *) it; 3250 if (connection->num_packets_completed){ 3251 little_endian_store_16(packet, size, connection->con_handle); 3252 size += 2; 3253 little_endian_store_16(packet, size, connection->num_packets_completed); 3254 size += 2; 3255 // 3256 num_handles++; 3257 connection->num_packets_completed = 0; 3258 } 3259 } 3260 3261 packet[2] = size - 3; 3262 packet[3] = num_handles; 3263 3264 hci_stack->host_completed_packets = 0; 3265 3266 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3267 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3268 3269 // release packet buffer for synchronous transport implementations 3270 if (hci_transport_synchronous()){ 3271 hci_release_packet_buffer(); 3272 hci_emit_transport_packet_sent(); 3273 } 3274 } 3275 #endif 3276 3277 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3278 UNUSED(ds); 3279 hci_stack->substate = HCI_HALTING_CLOSE; 3280 // allow packet handlers to defer final shutdown 3281 hci_emit_state(); 3282 hci_run(); 3283 } 3284 3285 static void hci_run(void){ 3286 3287 // log_info("hci_run: entered"); 3288 btstack_linked_item_t * it; 3289 3290 // send continuation fragments first, as they block the prepared packet buffer 3291 if (hci_stack->acl_fragmentation_total_size > 0) { 3292 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3293 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3294 if (connection) { 3295 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3296 hci_send_acl_packet_fragments(connection); 3297 return; 3298 } 3299 } else { 3300 // connection gone -> discard further fragments 3301 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3302 hci_stack->acl_fragmentation_total_size = 0; 3303 hci_stack->acl_fragmentation_pos = 0; 3304 } 3305 } 3306 3307 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3308 // send host num completed packets next as they don't require num_cmd_packets > 0 3309 if (!hci_can_send_comand_packet_transport()) return; 3310 if (hci_stack->host_completed_packets){ 3311 hci_host_num_completed_packets(); 3312 return; 3313 } 3314 #endif 3315 3316 if (!hci_can_send_command_packet_now()) return; 3317 3318 // global/non-connection oriented commands 3319 3320 #ifdef ENABLE_CLASSIC 3321 // decline incoming connections 3322 if (hci_stack->decline_reason){ 3323 uint8_t reason = hci_stack->decline_reason; 3324 hci_stack->decline_reason = 0; 3325 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3326 return; 3327 } 3328 // send scan enable 3329 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 3330 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3331 hci_stack->new_scan_enable_value = 0xff; 3332 return; 3333 } 3334 // start/stop inquiry 3335 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 3336 uint8_t duration = hci_stack->inquiry_state; 3337 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3338 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3339 return; 3340 } 3341 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3342 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3343 hci_send_cmd(&hci_inquiry_cancel); 3344 return; 3345 } 3346 // remote name request 3347 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3348 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3349 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3350 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3351 return; 3352 } 3353 // pairing 3354 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3355 uint8_t state = hci_stack->gap_pairing_state; 3356 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3357 switch (state){ 3358 case GAP_PAIRING_STATE_SEND_PIN: 3359 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); 3360 break; 3361 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3362 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3363 break; 3364 case GAP_PAIRING_STATE_SEND_PASSKEY: 3365 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3366 break; 3367 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3368 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3369 break; 3370 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3371 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3372 break; 3373 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3374 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3375 break; 3376 default: 3377 break; 3378 } 3379 return; 3380 } 3381 #endif 3382 3383 #ifdef ENABLE_BLE 3384 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 3385 if ((hci_stack->state == HCI_STATE_WORKING) 3386 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 3387 3388 #ifdef ENABLE_LE_CENTRAL 3389 // handle le scan 3390 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3391 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3392 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3393 return; 3394 } 3395 if (hci_stack->le_scan_type != 0xff){ 3396 // defaults: active scanning, accept all advertisement packets 3397 int scan_type = hci_stack->le_scan_type; 3398 hci_stack->le_scan_type = 0xff; 3399 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); 3400 return; 3401 } 3402 #endif 3403 #ifdef ENABLE_LE_PERIPHERAL 3404 // le advertisement control 3405 if (hci_stack->le_advertisements_todo){ 3406 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3407 } 3408 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3409 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3410 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3411 return; 3412 } 3413 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3414 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3415 hci_send_cmd(&hci_le_set_advertising_parameters, 3416 hci_stack->le_advertisements_interval_min, 3417 hci_stack->le_advertisements_interval_max, 3418 hci_stack->le_advertisements_type, 3419 hci_stack->le_own_addr_type, 3420 hci_stack->le_advertisements_direct_address_type, 3421 hci_stack->le_advertisements_direct_address, 3422 hci_stack->le_advertisements_channel_map, 3423 hci_stack->le_advertisements_filter_policy); 3424 return; 3425 } 3426 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3427 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3428 uint8_t adv_data_clean[31]; 3429 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3430 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3431 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3432 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3433 return; 3434 } 3435 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3436 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3437 uint8_t scan_data_clean[31]; 3438 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3439 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3440 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3441 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3442 return; 3443 } 3444 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3445 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3446 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3447 return; 3448 } 3449 #endif 3450 3451 #ifdef ENABLE_LE_CENTRAL 3452 // 3453 // LE Whitelist Management 3454 // 3455 3456 // check if whitelist needs modification 3457 btstack_linked_list_iterator_t lit; 3458 int modification_pending = 0; 3459 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3460 while (btstack_linked_list_iterator_has_next(&lit)){ 3461 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3462 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3463 modification_pending = 1; 3464 break; 3465 } 3466 } 3467 3468 if (modification_pending){ 3469 // stop connnecting if modification pending 3470 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3471 hci_send_cmd(&hci_le_create_connection_cancel); 3472 return; 3473 } 3474 3475 // add/remove entries 3476 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3477 while (btstack_linked_list_iterator_has_next(&lit)){ 3478 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3479 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3480 entry->state = LE_WHITELIST_ON_CONTROLLER; 3481 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3482 return; 3483 3484 } 3485 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3486 bd_addr_t address; 3487 bd_addr_type_t address_type = entry->address_type; 3488 memcpy(address, entry->address, 6); 3489 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3490 btstack_memory_whitelist_entry_free(entry); 3491 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3492 return; 3493 } 3494 } 3495 } 3496 3497 // start connecting 3498 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3499 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3500 bd_addr_t null_addr; 3501 memset(null_addr, 0, 6); 3502 hci_send_cmd(&hci_le_create_connection, 3503 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3504 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3505 1, // use whitelist 3506 0, // peer address type 3507 null_addr, // peer bd addr 3508 hci_stack->le_own_addr_type, // our addr type: 3509 hci_stack->le_connection_interval_min, // conn interval min 3510 hci_stack->le_connection_interval_max, // conn interval max 3511 hci_stack->le_connection_latency, // conn latency 3512 hci_stack->le_supervision_timeout, // conn latency 3513 hci_stack->le_minimum_ce_length, // min ce length 3514 hci_stack->le_maximum_ce_length // max ce length 3515 ); 3516 return; 3517 } 3518 #endif 3519 } 3520 #endif 3521 3522 // send pending HCI commands 3523 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3524 hci_connection_t * connection = (hci_connection_t *) it; 3525 3526 switch(connection->state){ 3527 case SEND_CREATE_CONNECTION: 3528 switch(connection->address_type){ 3529 #ifdef ENABLE_CLASSIC 3530 case BD_ADDR_TYPE_CLASSIC: 3531 log_info("sending hci_create_connection"); 3532 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3533 break; 3534 #endif 3535 default: 3536 #ifdef ENABLE_BLE 3537 #ifdef ENABLE_LE_CENTRAL 3538 // track outgoing connection 3539 hci_stack->outgoing_addr_type = connection->address_type; 3540 memcpy(hci_stack->outgoing_addr, connection->address, 6); 3541 log_info("sending hci_le_create_connection"); 3542 hci_send_cmd(&hci_le_create_connection, 3543 hci_stack->le_connection_scan_interval, // conn scan interval 3544 hci_stack->le_connection_scan_window, // conn scan windows 3545 0, // don't use whitelist 3546 connection->address_type, // peer address type 3547 connection->address, // peer bd addr 3548 hci_stack->le_own_addr_type, // our addr type: 3549 hci_stack->le_connection_interval_min, // conn interval min 3550 hci_stack->le_connection_interval_max, // conn interval max 3551 hci_stack->le_connection_latency, // conn latency 3552 hci_stack->le_supervision_timeout, // conn latency 3553 hci_stack->le_minimum_ce_length, // min ce length 3554 hci_stack->le_maximum_ce_length // max ce length 3555 ); 3556 connection->state = SENT_CREATE_CONNECTION; 3557 #endif 3558 #endif 3559 break; 3560 } 3561 return; 3562 3563 #ifdef ENABLE_CLASSIC 3564 case RECEIVED_CONNECTION_REQUEST: 3565 connection->role = HCI_ROLE_SLAVE; 3566 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3567 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3568 connection->state = ACCEPTED_CONNECTION_REQUEST; 3569 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3570 } 3571 return; 3572 #endif 3573 3574 #ifdef ENABLE_BLE 3575 #ifdef ENABLE_LE_CENTRAL 3576 case SEND_CANCEL_CONNECTION: 3577 connection->state = SENT_CANCEL_CONNECTION; 3578 hci_send_cmd(&hci_le_create_connection_cancel); 3579 return; 3580 #endif 3581 #endif 3582 case SEND_DISCONNECT: 3583 connection->state = SENT_DISCONNECT; 3584 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3585 return; 3586 3587 default: 3588 break; 3589 } 3590 3591 // no further commands if connection is about to get shut down 3592 if (connection->state == SENT_DISCONNECT) continue; 3593 3594 if (connection->authentication_flags & READ_RSSI){ 3595 connectionClearAuthenticationFlags(connection, READ_RSSI); 3596 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3597 return; 3598 } 3599 3600 #ifdef ENABLE_CLASSIC 3601 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3602 log_info("responding to link key request"); 3603 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3604 link_key_t link_key; 3605 link_key_type_t link_key_type; 3606 if ( hci_stack->link_key_db 3607 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3608 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3609 connection->link_key_type = link_key_type; 3610 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3611 } else { 3612 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3613 } 3614 return; 3615 } 3616 3617 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3618 log_info("denying to pin request"); 3619 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3620 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3621 return; 3622 } 3623 3624 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3625 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3626 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3627 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3628 // tweak authentication requirements 3629 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3630 if (connection->bonding_flags & BONDING_DEDICATED){ 3631 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3632 } 3633 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3634 authreq |= 1; 3635 } 3636 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3637 } else { 3638 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3639 } 3640 return; 3641 } 3642 3643 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3644 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3645 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3646 return; 3647 } 3648 3649 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3650 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3651 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3652 return; 3653 } 3654 3655 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3656 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3657 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3658 return; 3659 } 3660 3661 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3662 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3663 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3664 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3665 return; 3666 } 3667 3668 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3669 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3670 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3671 return; 3672 } 3673 3674 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3675 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3676 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3677 return; 3678 } 3679 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3680 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3681 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3682 return; 3683 } 3684 #endif 3685 3686 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3687 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3688 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3689 return; 3690 } 3691 3692 #ifdef ENABLE_CLASSIC 3693 uint16_t sniff_min_interval; 3694 switch (connection->sniff_min_interval){ 3695 case 0: 3696 break; 3697 case 0xffff: 3698 connection->sniff_min_interval = 0; 3699 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3700 return; 3701 default: 3702 sniff_min_interval = connection->sniff_min_interval; 3703 connection->sniff_min_interval = 0; 3704 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3705 return; 3706 } 3707 #endif 3708 3709 #ifdef ENABLE_BLE 3710 switch (connection->le_con_parameter_update_state){ 3711 // response to L2CAP CON PARAMETER UPDATE REQUEST 3712 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3713 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3714 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3715 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3716 0x0000, 0xffff); 3717 return; 3718 case CON_PARAMETER_UPDATE_REPLY: 3719 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3720 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3721 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3722 0x0000, 0xffff); 3723 return; 3724 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3725 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3726 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3727 return; 3728 default: 3729 break; 3730 } 3731 if (connection->le_phy_update_all_phys != 0xff){ 3732 uint8_t all_phys = connection->le_phy_update_all_phys; 3733 connection->le_phy_update_all_phys = 0xff; 3734 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); 3735 return; 3736 } 3737 #endif 3738 } 3739 3740 hci_connection_t * connection; 3741 switch (hci_stack->state){ 3742 case HCI_STATE_INITIALIZING: 3743 hci_initializing_run(); 3744 break; 3745 3746 case HCI_STATE_HALTING: 3747 3748 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 3749 switch (hci_stack->substate){ 3750 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 3751 case HCI_HALTING_DISCONNECT_ALL_TIMER: 3752 3753 #ifdef ENABLE_BLE 3754 #ifdef ENABLE_LE_CENTRAL 3755 // free whitelist entries 3756 { 3757 btstack_linked_list_iterator_t lit; 3758 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3759 while (btstack_linked_list_iterator_has_next(&lit)){ 3760 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3761 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3762 btstack_memory_whitelist_entry_free(entry); 3763 } 3764 } 3765 #endif 3766 #endif 3767 // close all open connections 3768 connection = (hci_connection_t *) hci_stack->connections; 3769 if (connection){ 3770 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3771 if (!hci_can_send_command_packet_now()) return; 3772 3773 // check state 3774 if (connection->state == SENT_DISCONNECT) return; 3775 connection->state = SENT_DISCONNECT; 3776 3777 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3778 3779 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3780 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3781 3782 // ... which would be ignored anyway as we shutdown (free) the connection now 3783 hci_shutdown_connection(connection); 3784 3785 // finally, send the disconnect command 3786 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3787 return; 3788 } 3789 3790 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 3791 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 3792 log_info("HCI_STATE_HALTING: wait 50 ms"); 3793 hci_stack->substate = HCI_HALTING_W4_TIMER; 3794 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 3795 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3796 btstack_run_loop_add_timer(&hci_stack->timeout); 3797 break; 3798 } 3799 3800 /* explicit fall-through */ 3801 3802 case HCI_HALTING_CLOSE: 3803 log_info("HCI_STATE_HALTING, calling off"); 3804 3805 // switch mode 3806 hci_power_control_off(); 3807 3808 log_info("HCI_STATE_HALTING, emitting state"); 3809 hci_emit_state(); 3810 log_info("HCI_STATE_HALTING, done"); 3811 break; 3812 3813 case HCI_HALTING_W4_TIMER: 3814 // keep waiting 3815 3816 break; 3817 default: 3818 break; 3819 } 3820 3821 break; 3822 3823 case HCI_STATE_FALLING_ASLEEP: 3824 switch(hci_stack->substate) { 3825 case HCI_FALLING_ASLEEP_DISCONNECT: 3826 log_info("HCI_STATE_FALLING_ASLEEP"); 3827 // close all open connections 3828 connection = (hci_connection_t *) hci_stack->connections; 3829 3830 #ifdef HAVE_PLATFORM_IPHONE_OS 3831 // don't close connections, if H4 supports power management 3832 if (btstack_control_iphone_power_management_enabled()){ 3833 connection = NULL; 3834 } 3835 #endif 3836 if (connection){ 3837 3838 // send disconnect 3839 if (!hci_can_send_command_packet_now()) return; 3840 3841 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3842 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3843 3844 // send disconnected event right away - causes higher layer connections to get closed, too. 3845 hci_shutdown_connection(connection); 3846 return; 3847 } 3848 3849 if (hci_classic_supported()){ 3850 // disable page and inquiry scan 3851 if (!hci_can_send_command_packet_now()) return; 3852 3853 log_info("HCI_STATE_HALTING, disabling inq scans"); 3854 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3855 3856 // continue in next sub state 3857 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3858 break; 3859 } 3860 // no break - fall through for ble-only chips 3861 3862 case HCI_FALLING_ASLEEP_COMPLETE: 3863 log_info("HCI_STATE_HALTING, calling sleep"); 3864 #ifdef HAVE_PLATFORM_IPHONE_OS 3865 // don't actually go to sleep, if H4 supports power management 3866 if (btstack_control_iphone_power_management_enabled()){ 3867 // SLEEP MODE reached 3868 hci_stack->state = HCI_STATE_SLEEPING; 3869 hci_emit_state(); 3870 break; 3871 } 3872 #endif 3873 // switch mode 3874 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3875 hci_emit_state(); 3876 break; 3877 3878 default: 3879 break; 3880 } 3881 break; 3882 3883 default: 3884 break; 3885 } 3886 } 3887 3888 int hci_send_cmd_packet(uint8_t *packet, int size){ 3889 // house-keeping 3890 3891 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3892 hci_stack->loopback_mode = packet[3]; 3893 } 3894 3895 #ifdef ENABLE_CLASSIC 3896 bd_addr_t addr; 3897 hci_connection_t * conn; 3898 3899 // create_connection? 3900 if (IS_COMMAND(packet, hci_create_connection)){ 3901 reverse_bd_addr(&packet[3], addr); 3902 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3903 3904 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3905 if (!conn){ 3906 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3907 if (!conn){ 3908 // notify client that alloc failed 3909 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3910 return -1; // packet not sent to controller 3911 } 3912 conn->state = SEND_CREATE_CONNECTION; 3913 } 3914 log_info("conn state %u", conn->state); 3915 switch (conn->state){ 3916 // if connection active exists 3917 case OPEN: 3918 // and OPEN, emit connection complete command 3919 hci_emit_connection_complete(addr, conn->con_handle, 0); 3920 return -1; // packet not sent to controller 3921 case SEND_CREATE_CONNECTION: 3922 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 3923 break; 3924 default: 3925 // otherwise, just ignore as it is already in the open process 3926 return -1; // packet not sent to controller 3927 } 3928 conn->state = SENT_CREATE_CONNECTION; 3929 3930 // track outgoing connection 3931 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_CLASSIC; 3932 memcpy(hci_stack->outgoing_addr, addr, 6); 3933 } 3934 3935 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3936 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3937 } 3938 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3939 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3940 } 3941 3942 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3943 if (hci_stack->link_key_db){ 3944 reverse_bd_addr(&packet[3], addr); 3945 hci_stack->link_key_db->delete_link_key(addr); 3946 } 3947 } 3948 3949 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3950 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3951 reverse_bd_addr(&packet[3], addr); 3952 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3953 if (conn){ 3954 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3955 } 3956 } 3957 3958 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3959 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3960 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3961 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3962 reverse_bd_addr(&packet[3], addr); 3963 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3964 if (conn){ 3965 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3966 } 3967 } 3968 3969 #ifdef ENABLE_SCO_OVER_HCI 3970 // setup_synchronous_connection? Voice setting at offset 22 3971 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3972 // TODO: compare to current setting if sco connection already active 3973 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3974 } 3975 // accept_synchronus_connection? Voice setting at offset 18 3976 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3977 // TODO: compare to current setting if sco connection already active 3978 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3979 } 3980 #endif 3981 #endif 3982 3983 #ifdef ENABLE_BLE 3984 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3985 hci_stack->le_random_address_set = 1; 3986 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3987 } 3988 #ifdef ENABLE_LE_PERIPHERAL 3989 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3990 hci_stack->le_advertisements_active = packet[3]; 3991 } 3992 #endif 3993 #ifdef ENABLE_LE_CENTRAL 3994 if (IS_COMMAND(packet, hci_le_create_connection)){ 3995 // white list used? 3996 uint8_t initiator_filter_policy = packet[7]; 3997 switch (initiator_filter_policy){ 3998 case 0: 3999 // whitelist not used 4000 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4001 break; 4002 case 1: 4003 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4004 break; 4005 default: 4006 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4007 break; 4008 } 4009 } 4010 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 4011 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4012 } 4013 #endif 4014 #endif 4015 4016 hci_stack->num_cmd_packets--; 4017 4018 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4019 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4020 } 4021 4022 // disconnect because of security block 4023 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4024 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4025 if (!connection) return; 4026 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4027 } 4028 4029 4030 // Configure Secure Simple Pairing 4031 4032 #ifdef ENABLE_CLASSIC 4033 4034 // enable will enable SSP during init 4035 void gap_ssp_set_enable(int enable){ 4036 hci_stack->ssp_enable = enable; 4037 } 4038 4039 static int hci_local_ssp_activated(void){ 4040 return gap_ssp_supported() && hci_stack->ssp_enable; 4041 } 4042 4043 // if set, BTstack will respond to io capability request using authentication requirement 4044 void gap_ssp_set_io_capability(int io_capability){ 4045 hci_stack->ssp_io_capability = io_capability; 4046 } 4047 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4048 hci_stack->ssp_authentication_requirement = authentication_requirement; 4049 } 4050 4051 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4052 void gap_ssp_set_auto_accept(int auto_accept){ 4053 hci_stack->ssp_auto_accept = auto_accept; 4054 } 4055 #endif 4056 4057 // va_list part of hci_send_cmd 4058 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4059 if (!hci_can_send_command_packet_now()){ 4060 log_error("hci_send_cmd called but cannot send packet now"); 4061 return 0; 4062 } 4063 4064 // for HCI INITIALIZATION 4065 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4066 hci_stack->last_cmd_opcode = cmd->opcode; 4067 4068 hci_reserve_packet_buffer(); 4069 uint8_t * packet = hci_stack->hci_packet_buffer; 4070 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4071 int err = hci_send_cmd_packet(packet, size); 4072 4073 // release packet buffer for synchronous transport implementations 4074 if (hci_transport_synchronous()){ 4075 hci_release_packet_buffer(); 4076 hci_emit_transport_packet_sent(); 4077 } 4078 4079 return err; 4080 } 4081 4082 /** 4083 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4084 */ 4085 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4086 va_list argptr; 4087 va_start(argptr, cmd); 4088 int res = hci_send_cmd_va_arg(cmd, argptr); 4089 va_end(argptr); 4090 return res; 4091 } 4092 4093 // Create various non-HCI events. 4094 // TODO: generalize, use table similar to hci_create_command 4095 4096 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4097 // dump packet 4098 if (dump) { 4099 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4100 } 4101 4102 // dispatch to all event handlers 4103 btstack_linked_list_iterator_t it; 4104 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4105 while (btstack_linked_list_iterator_has_next(&it)){ 4106 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4107 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4108 } 4109 } 4110 4111 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4112 if (!hci_stack->acl_packet_handler) return; 4113 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4114 } 4115 4116 #ifdef ENABLE_CLASSIC 4117 static void hci_notify_if_sco_can_send_now(void){ 4118 // notify SCO sender if waiting 4119 if (!hci_stack->sco_waiting_for_can_send_now) return; 4120 if (hci_can_send_sco_packet_now()){ 4121 hci_stack->sco_waiting_for_can_send_now = 0; 4122 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4123 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4124 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4125 } 4126 } 4127 4128 // parsing end emitting has been merged to reduce code size 4129 static void gap_inquiry_explode(uint8_t * packet){ 4130 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4131 4132 uint8_t * eir_data; 4133 ad_context_t context; 4134 const uint8_t * name; 4135 uint8_t name_len; 4136 4137 int event_type = hci_event_packet_get_type(packet); 4138 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 4139 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4140 4141 // event[1] is set at the end 4142 int i; 4143 for (i=0; i<num_responses;i++){ 4144 memset(event, 0, sizeof(event)); 4145 event[0] = GAP_EVENT_INQUIRY_RESULT; 4146 uint8_t event_size = 18; // if name is not set by EIR 4147 4148 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 4149 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 4150 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 4151 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 4152 4153 switch (event_type){ 4154 case HCI_EVENT_INQUIRY_RESULT: 4155 // 14,15,16,17 = 0, size 18 4156 break; 4157 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4158 event[14] = 1; 4159 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 4160 // 16,17 = 0, size 18 4161 break; 4162 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4163 event[14] = 1; 4164 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 4165 // for EIR packets, there is only one reponse in it 4166 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4167 name = NULL; 4168 // EIR data is 240 bytes in EIR event 4169 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4170 uint8_t data_type = ad_iterator_get_data_type(&context); 4171 uint8_t data_size = ad_iterator_get_data_len(&context); 4172 const uint8_t * data = ad_iterator_get_data(&context); 4173 // Prefer Complete Local Name over Shortend Local Name 4174 switch (data_type){ 4175 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4176 if (name) continue; 4177 /* explicit fall-through */ 4178 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4179 name = data; 4180 name_len = data_size; 4181 break; 4182 default: 4183 break; 4184 } 4185 } 4186 if (name){ 4187 event[16] = 1; 4188 // truncate name if needed 4189 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4190 event[17] = len; 4191 memcpy(&event[18], name, len); 4192 event_size += len; 4193 } 4194 break; 4195 } 4196 event[1] = event_size - 2; 4197 hci_emit_event(event, event_size, 1); 4198 } 4199 } 4200 #endif 4201 4202 void hci_emit_state(void){ 4203 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4204 uint8_t event[3]; 4205 event[0] = BTSTACK_EVENT_STATE; 4206 event[1] = sizeof(event) - 2; 4207 event[2] = hci_stack->state; 4208 hci_emit_event(event, sizeof(event), 1); 4209 } 4210 4211 #ifdef ENABLE_CLASSIC 4212 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4213 uint8_t event[13]; 4214 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4215 event[1] = sizeof(event) - 2; 4216 event[2] = status; 4217 little_endian_store_16(event, 3, con_handle); 4218 reverse_bd_addr(address, &event[5]); 4219 event[11] = 1; // ACL connection 4220 event[12] = 0; // encryption disabled 4221 hci_emit_event(event, sizeof(event), 1); 4222 } 4223 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4224 if (disable_l2cap_timeouts) return; 4225 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4226 uint8_t event[4]; 4227 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4228 event[1] = sizeof(event) - 2; 4229 little_endian_store_16(event, 2, conn->con_handle); 4230 hci_emit_event(event, sizeof(event), 1); 4231 } 4232 #endif 4233 4234 #ifdef ENABLE_BLE 4235 #ifdef ENABLE_LE_CENTRAL 4236 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4237 uint8_t event[21]; 4238 event[0] = HCI_EVENT_LE_META; 4239 event[1] = sizeof(event) - 2; 4240 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4241 event[3] = status; 4242 little_endian_store_16(event, 4, con_handle); 4243 event[6] = 0; // TODO: role 4244 event[7] = address_type; 4245 reverse_bd_addr(address, &event[8]); 4246 little_endian_store_16(event, 14, 0); // interval 4247 little_endian_store_16(event, 16, 0); // latency 4248 little_endian_store_16(event, 18, 0); // supervision timeout 4249 event[20] = 0; // master clock accuracy 4250 hci_emit_event(event, sizeof(event), 1); 4251 } 4252 #endif 4253 #endif 4254 4255 static void hci_emit_transport_packet_sent(void){ 4256 // notify upper stack that it might be possible to send again 4257 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4258 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4259 } 4260 4261 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4262 uint8_t event[6]; 4263 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4264 event[1] = sizeof(event) - 2; 4265 event[2] = 0; // status = OK 4266 little_endian_store_16(event, 3, con_handle); 4267 event[5] = reason; 4268 hci_emit_event(event, sizeof(event), 1); 4269 } 4270 4271 static void hci_emit_nr_connections_changed(void){ 4272 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4273 uint8_t event[3]; 4274 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4275 event[1] = sizeof(event) - 2; 4276 event[2] = nr_hci_connections(); 4277 hci_emit_event(event, sizeof(event), 1); 4278 } 4279 4280 static void hci_emit_hci_open_failed(void){ 4281 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4282 uint8_t event[2]; 4283 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4284 event[1] = sizeof(event) - 2; 4285 hci_emit_event(event, sizeof(event), 1); 4286 } 4287 4288 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4289 log_info("hci_emit_dedicated_bonding_result %u ", status); 4290 uint8_t event[9]; 4291 int pos = 0; 4292 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4293 event[pos++] = sizeof(event) - 2; 4294 event[pos++] = status; 4295 reverse_bd_addr(address, &event[pos]); 4296 hci_emit_event(event, sizeof(event), 1); 4297 } 4298 4299 4300 #ifdef ENABLE_CLASSIC 4301 4302 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4303 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4304 uint8_t event[5]; 4305 int pos = 0; 4306 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4307 event[pos++] = sizeof(event) - 2; 4308 little_endian_store_16(event, 2, con_handle); 4309 pos += 2; 4310 event[pos++] = level; 4311 hci_emit_event(event, sizeof(event), 1); 4312 } 4313 4314 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4315 if (!connection) return LEVEL_0; 4316 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4317 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4318 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4319 // LEVEL 4 always requires 128 bit encrytion key size 4320 if (security_level == LEVEL_4 && connection->encryption_key_size < 16){ 4321 security_level = LEVEL_3; 4322 } 4323 return security_level; 4324 } 4325 4326 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4327 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4328 uint8_t event[3]; 4329 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4330 event[1] = sizeof(event) - 2; 4331 event[2] = enabled; 4332 hci_emit_event(event, sizeof(event), 1); 4333 } 4334 4335 // query if remote side supports eSCO 4336 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4337 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4338 if (!connection) return 0; 4339 return connection->remote_supported_feature_eSCO; 4340 } 4341 4342 // query if remote side supports SSP 4343 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4344 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4345 if (!connection) return 0; 4346 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4347 } 4348 4349 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4350 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4351 } 4352 4353 // GAP API 4354 /** 4355 * @bbrief enable/disable bonding. default is enabled 4356 * @praram enabled 4357 */ 4358 void gap_set_bondable_mode(int enable){ 4359 hci_stack->bondable = enable ? 1 : 0; 4360 } 4361 /** 4362 * @brief Get bondable mode. 4363 * @return 1 if bondable 4364 */ 4365 int gap_get_bondable_mode(void){ 4366 return hci_stack->bondable; 4367 } 4368 4369 /** 4370 * @brief map link keys to security levels 4371 */ 4372 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4373 switch (link_key_type){ 4374 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4375 return LEVEL_4; 4376 case COMBINATION_KEY: 4377 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4378 return LEVEL_3; 4379 default: 4380 return LEVEL_2; 4381 } 4382 } 4383 4384 /** 4385 * @brief map link keys to secure connection yes/no 4386 */ 4387 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4388 switch (link_key_type){ 4389 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4390 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4391 return 1; 4392 default: 4393 return 0; 4394 } 4395 } 4396 4397 /** 4398 * @brief map link keys to authenticated 4399 */ 4400 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4401 switch (link_key_type){ 4402 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4403 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4404 return 1; 4405 default: 4406 return 0; 4407 } 4408 } 4409 4410 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4411 log_info("gap_mitm_protection_required_for_security_level %u", level); 4412 return level > LEVEL_2; 4413 } 4414 4415 /** 4416 * @brief get current security level 4417 */ 4418 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4419 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4420 if (!connection) return LEVEL_0; 4421 return gap_security_level_for_connection(connection); 4422 } 4423 4424 /** 4425 * @brief request connection to device to 4426 * @result GAP_AUTHENTICATION_RESULT 4427 */ 4428 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4429 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4430 if (!connection){ 4431 hci_emit_security_level(con_handle, LEVEL_0); 4432 return; 4433 } 4434 gap_security_level_t current_level = gap_security_level(con_handle); 4435 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4436 requested_level, connection->requested_security_level, current_level); 4437 4438 // assumption: earlier requested security higher than current level => security request is active 4439 if (current_level < connection->requested_security_level){ 4440 if (connection->requested_security_level < requested_level){ 4441 // increase requested level as new level is higher 4442 4443 // TODO: handle re-authentication when done 4444 4445 connection->requested_security_level = requested_level; 4446 } 4447 return; 4448 } 4449 4450 // no request active, notify if security sufficient 4451 if (requested_level <= current_level){ 4452 hci_emit_security_level(con_handle, current_level); 4453 return; 4454 } 4455 4456 // start pairing to increase security level 4457 connection->requested_security_level = requested_level; 4458 4459 #if 0 4460 // sending encryption request without a link key results in an error. 4461 // TODO: figure out how to use it properly 4462 4463 // would enabling ecnryption suffice (>= LEVEL_2)? 4464 if (hci_stack->link_key_db){ 4465 link_key_type_t link_key_type; 4466 link_key_t link_key; 4467 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4468 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4469 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4470 return; 4471 } 4472 } 4473 } 4474 #endif 4475 4476 // start to authenticate connection 4477 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4478 hci_run(); 4479 } 4480 4481 /** 4482 * @brief start dedicated bonding with device. disconnect after bonding 4483 * @param device 4484 * @param request MITM protection 4485 * @result GAP_DEDICATED_BONDING_COMPLETE 4486 */ 4487 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4488 4489 // create connection state machine 4490 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 4491 4492 if (!connection){ 4493 return BTSTACK_MEMORY_ALLOC_FAILED; 4494 } 4495 4496 // delete linkn key 4497 gap_drop_link_key_for_bd_addr(device); 4498 4499 // configure LEVEL_2/3, dedicated bonding 4500 connection->state = SEND_CREATE_CONNECTION; 4501 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4502 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4503 connection->bonding_flags = BONDING_DEDICATED; 4504 4505 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4506 4507 // handle: connnection failure (connection complete != ok) 4508 // handle: authentication failure 4509 // handle: disconnect on done 4510 4511 hci_run(); 4512 4513 return 0; 4514 } 4515 #endif 4516 4517 void gap_set_local_name(const char * local_name){ 4518 hci_stack->local_name = local_name; 4519 } 4520 4521 4522 #ifdef ENABLE_BLE 4523 4524 #ifdef ENABLE_LE_CENTRAL 4525 void gap_start_scan(void){ 4526 hci_stack->le_scanning_enabled = 1; 4527 hci_run(); 4528 } 4529 4530 void gap_stop_scan(void){ 4531 hci_stack->le_scanning_enabled = 0; 4532 hci_run(); 4533 } 4534 4535 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4536 hci_stack->le_scan_type = scan_type; 4537 hci_stack->le_scan_interval = scan_interval; 4538 hci_stack->le_scan_window = scan_window; 4539 hci_run(); 4540 } 4541 4542 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4543 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4544 if (!conn){ 4545 log_info("gap_connect: no connection exists yet, creating context"); 4546 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4547 if (!conn){ 4548 // notify client that alloc failed 4549 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4550 log_info("gap_connect: failed to alloc hci_connection_t"); 4551 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4552 } 4553 conn->state = SEND_CREATE_CONNECTION; 4554 log_info("gap_connect: send create connection next"); 4555 hci_run(); 4556 return 0; 4557 } 4558 4559 if (!hci_is_le_connection(conn) || 4560 conn->state == SEND_CREATE_CONNECTION || 4561 conn->state == SENT_CREATE_CONNECTION) { 4562 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4563 log_error("gap_connect: classic connection or connect is already being created"); 4564 return GATT_CLIENT_IN_WRONG_STATE; 4565 } 4566 4567 log_info("gap_connect: context exists with state %u", conn->state); 4568 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4569 hci_run(); 4570 return 0; 4571 } 4572 4573 // @assumption: only a single outgoing LE Connection exists 4574 static hci_connection_t * gap_get_outgoing_connection(void){ 4575 btstack_linked_item_t *it; 4576 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4577 hci_connection_t * conn = (hci_connection_t *) it; 4578 if (!hci_is_le_connection(conn)) continue; 4579 switch (conn->state){ 4580 case SEND_CREATE_CONNECTION: 4581 case SENT_CREATE_CONNECTION: 4582 case SENT_CANCEL_CONNECTION: 4583 return conn; 4584 default: 4585 break; 4586 }; 4587 } 4588 return NULL; 4589 } 4590 4591 uint8_t gap_connect_cancel(void){ 4592 hci_connection_t * conn = gap_get_outgoing_connection(); 4593 if (!conn) return 0; 4594 switch (conn->state){ 4595 case SEND_CREATE_CONNECTION: 4596 // skip sending create connection and emit event instead 4597 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4598 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4599 btstack_memory_hci_connection_free( conn ); 4600 break; 4601 case SENT_CREATE_CONNECTION: 4602 // request to send cancel connection 4603 conn->state = SEND_CANCEL_CONNECTION; 4604 hci_run(); 4605 break; 4606 default: 4607 break; 4608 } 4609 return 0; 4610 } 4611 #endif 4612 4613 #ifdef ENABLE_LE_CENTRAL 4614 /** 4615 * @brief Set connection parameters for outgoing connections 4616 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4617 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4618 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4619 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4620 * @param conn_latency, default: 4 4621 * @param supervision_timeout (unit: 10ms), default: 720 ms 4622 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4623 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4624 */ 4625 4626 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4627 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4628 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4629 hci_stack->le_connection_scan_interval = conn_scan_interval; 4630 hci_stack->le_connection_scan_window = conn_scan_window; 4631 hci_stack->le_connection_interval_min = conn_interval_min; 4632 hci_stack->le_connection_interval_max = conn_interval_max; 4633 hci_stack->le_connection_latency = conn_latency; 4634 hci_stack->le_supervision_timeout = supervision_timeout; 4635 hci_stack->le_minimum_ce_length = min_ce_length; 4636 hci_stack->le_maximum_ce_length = max_ce_length; 4637 } 4638 #endif 4639 4640 /** 4641 * @brief Updates the connection parameters for a given LE connection 4642 * @param handle 4643 * @param conn_interval_min (unit: 1.25ms) 4644 * @param conn_interval_max (unit: 1.25ms) 4645 * @param conn_latency 4646 * @param supervision_timeout (unit: 10ms) 4647 * @returns 0 if ok 4648 */ 4649 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4650 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4651 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4652 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4653 connection->le_conn_interval_min = conn_interval_min; 4654 connection->le_conn_interval_max = conn_interval_max; 4655 connection->le_conn_latency = conn_latency; 4656 connection->le_supervision_timeout = supervision_timeout; 4657 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4658 hci_run(); 4659 return 0; 4660 } 4661 4662 /** 4663 * @brief Request an update of the connection parameter for a given LE connection 4664 * @param handle 4665 * @param conn_interval_min (unit: 1.25ms) 4666 * @param conn_interval_max (unit: 1.25ms) 4667 * @param conn_latency 4668 * @param supervision_timeout (unit: 10ms) 4669 * @returns 0 if ok 4670 */ 4671 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4672 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4673 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4674 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4675 connection->le_conn_interval_min = conn_interval_min; 4676 connection->le_conn_interval_max = conn_interval_max; 4677 connection->le_conn_latency = conn_latency; 4678 connection->le_supervision_timeout = supervision_timeout; 4679 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4680 hci_run(); 4681 return 0; 4682 } 4683 4684 #ifdef ENABLE_LE_PERIPHERAL 4685 4686 static void gap_advertisments_changed(void){ 4687 // disable advertisements before updating adv, scan data, or adv params 4688 if (hci_stack->le_advertisements_active){ 4689 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4690 } 4691 hci_run(); 4692 } 4693 4694 /** 4695 * @brief Set Advertisement Data 4696 * @param advertising_data_length 4697 * @param advertising_data (max 31 octets) 4698 * @note data is not copied, pointer has to stay valid 4699 */ 4700 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4701 hci_stack->le_advertisements_data_len = advertising_data_length; 4702 hci_stack->le_advertisements_data = advertising_data; 4703 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4704 gap_advertisments_changed(); 4705 } 4706 4707 /** 4708 * @brief Set Scan Response Data 4709 * @param advertising_data_length 4710 * @param advertising_data (max 31 octets) 4711 * @note data is not copied, pointer has to stay valid 4712 */ 4713 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4714 hci_stack->le_scan_response_data_len = scan_response_data_length; 4715 hci_stack->le_scan_response_data = scan_response_data; 4716 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4717 gap_advertisments_changed(); 4718 } 4719 4720 /** 4721 * @brief Set Advertisement Parameters 4722 * @param adv_int_min 4723 * @param adv_int_max 4724 * @param adv_type 4725 * @param direct_address_type 4726 * @param direct_address 4727 * @param channel_map 4728 * @param filter_policy 4729 * 4730 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4731 */ 4732 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4733 uint8_t direct_address_typ, bd_addr_t direct_address, 4734 uint8_t channel_map, uint8_t filter_policy) { 4735 4736 hci_stack->le_advertisements_interval_min = adv_int_min; 4737 hci_stack->le_advertisements_interval_max = adv_int_max; 4738 hci_stack->le_advertisements_type = adv_type; 4739 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4740 hci_stack->le_advertisements_channel_map = channel_map; 4741 hci_stack->le_advertisements_filter_policy = filter_policy; 4742 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4743 4744 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4745 gap_advertisments_changed(); 4746 } 4747 4748 /** 4749 * @brief Enable/Disable Advertisements 4750 * @param enabled 4751 */ 4752 void gap_advertisements_enable(int enabled){ 4753 hci_stack->le_advertisements_enabled = enabled; 4754 if (enabled && !hci_stack->le_advertisements_active){ 4755 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4756 } 4757 if (!enabled && hci_stack->le_advertisements_active){ 4758 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4759 } 4760 hci_run(); 4761 } 4762 4763 #endif 4764 4765 void hci_le_set_own_address_type(uint8_t own_address_type){ 4766 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4767 if (own_address_type == hci_stack->le_own_addr_type) return; 4768 hci_stack->le_own_addr_type = own_address_type; 4769 4770 #ifdef ENABLE_LE_PERIPHERAL 4771 // update advertisement parameters, too 4772 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4773 gap_advertisments_changed(); 4774 #endif 4775 #ifdef ENABLE_LE_CENTRAL 4776 // note: we don't update scan parameters or modify ongoing connection attempts 4777 #endif 4778 } 4779 4780 #endif 4781 4782 uint8_t gap_disconnect(hci_con_handle_t handle){ 4783 hci_connection_t * conn = hci_connection_for_handle(handle); 4784 if (!conn){ 4785 hci_emit_disconnection_complete(handle, 0); 4786 return 0; 4787 } 4788 // ignore if already disconnected 4789 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4790 return 0; 4791 } 4792 conn->state = SEND_DISCONNECT; 4793 hci_run(); 4794 return 0; 4795 } 4796 4797 int gap_read_rssi(hci_con_handle_t con_handle){ 4798 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 4799 if (hci_connection == NULL) return 0; 4800 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 4801 hci_run(); 4802 return 1; 4803 } 4804 4805 /** 4806 * @brief Get connection type 4807 * @param con_handle 4808 * @result connection_type 4809 */ 4810 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4811 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4812 if (!conn) return GAP_CONNECTION_INVALID; 4813 switch (conn->address_type){ 4814 case BD_ADDR_TYPE_LE_PUBLIC: 4815 case BD_ADDR_TYPE_LE_RANDOM: 4816 return GAP_CONNECTION_LE; 4817 case BD_ADDR_TYPE_SCO: 4818 return GAP_CONNECTION_SCO; 4819 case BD_ADDR_TYPE_CLASSIC: 4820 return GAP_CONNECTION_ACL; 4821 default: 4822 return GAP_CONNECTION_INVALID; 4823 } 4824 } 4825 4826 #ifdef ENABLE_BLE 4827 4828 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){ 4829 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4830 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4831 4832 conn->le_phy_update_all_phys = all_phys; 4833 conn->le_phy_update_tx_phys = tx_phys; 4834 conn->le_phy_update_rx_phys = rx_phys; 4835 conn->le_phy_update_phy_options = phy_options; 4836 4837 hci_run(); 4838 4839 return 0; 4840 } 4841 4842 #ifdef ENABLE_LE_CENTRAL 4843 /** 4844 * @brief Auto Connection Establishment - Start Connecting to device 4845 * @param address_typ 4846 * @param address 4847 * @returns 0 if ok 4848 */ 4849 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4850 // check capacity 4851 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4852 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4853 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4854 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4855 entry->address_type = address_type; 4856 memcpy(entry->address, address, 6); 4857 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4858 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4859 hci_run(); 4860 return 0; 4861 } 4862 4863 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4864 btstack_linked_list_iterator_t it; 4865 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4866 while (btstack_linked_list_iterator_has_next(&it)){ 4867 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4868 if (entry->address_type != address_type) continue; 4869 if (memcmp(entry->address, address, 6) != 0) continue; 4870 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4871 // remove from controller if already present 4872 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4873 continue; 4874 } 4875 // direclty remove entry from whitelist 4876 btstack_linked_list_iterator_remove(&it); 4877 btstack_memory_whitelist_entry_free(entry); 4878 } 4879 } 4880 4881 /** 4882 * @brief Auto Connection Establishment - Stop Connecting to device 4883 * @param address_typ 4884 * @param address 4885 * @returns 0 if ok 4886 */ 4887 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4888 hci_remove_from_whitelist(address_type, address); 4889 hci_run(); 4890 return 0; 4891 } 4892 4893 /** 4894 * @brief Auto Connection Establishment - Stop everything 4895 * @note Convenience function to stop all active auto connection attempts 4896 */ 4897 void gap_auto_connection_stop_all(void){ 4898 btstack_linked_list_iterator_t it; 4899 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4900 while (btstack_linked_list_iterator_has_next(&it)){ 4901 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4902 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4903 // remove from controller if already present 4904 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4905 continue; 4906 } 4907 // directly remove entry from whitelist 4908 btstack_linked_list_iterator_remove(&it); 4909 btstack_memory_whitelist_entry_free(entry); 4910 } 4911 hci_run(); 4912 } 4913 4914 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 4915 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4916 if (!conn) return 0; 4917 return conn->le_connection_interval; 4918 } 4919 #endif 4920 #endif 4921 4922 #ifdef ENABLE_CLASSIC 4923 /** 4924 * @brief Set Extended Inquiry Response data 4925 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4926 * @note has to be done before stack starts up 4927 */ 4928 void gap_set_extended_inquiry_response(const uint8_t * data){ 4929 hci_stack->eir_data = data; 4930 } 4931 4932 /** 4933 * @brief Start GAP Classic Inquiry 4934 * @param duration in 1.28s units 4935 * @return 0 if ok 4936 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4937 */ 4938 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4939 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 4940 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4941 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4942 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4943 } 4944 hci_stack->inquiry_state = duration_in_1280ms_units; 4945 hci_run(); 4946 return 0; 4947 } 4948 4949 /** 4950 * @brief Stop GAP Classic Inquiry 4951 * @returns 0 if ok 4952 */ 4953 int gap_inquiry_stop(void){ 4954 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4955 // emit inquiry complete event, before it even started 4956 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4957 hci_emit_event(event, sizeof(event), 1); 4958 return 0; 4959 } 4960 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4961 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4962 hci_run(); 4963 return 0; 4964 } 4965 4966 4967 /** 4968 * @brief Remote Name Request 4969 * @param addr 4970 * @param page_scan_repetition_mode 4971 * @param clock_offset only used when bit 15 is set 4972 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4973 */ 4974 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4975 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4976 memcpy(hci_stack->remote_name_addr, addr, 6); 4977 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4978 hci_stack->remote_name_clock_offset = clock_offset; 4979 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4980 hci_run(); 4981 return 0; 4982 } 4983 4984 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4985 hci_stack->gap_pairing_state = state; 4986 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4987 hci_run(); 4988 return 0; 4989 } 4990 4991 /** 4992 * @brief Legacy Pairing Pin Code Response 4993 * @param addr 4994 * @param pin 4995 * @return 0 if ok 4996 */ 4997 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4998 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4999 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 5000 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5001 } 5002 5003 /** 5004 * @brief Abort Legacy Pairing 5005 * @param addr 5006 * @param pin 5007 * @return 0 if ok 5008 */ 5009 int gap_pin_code_negative(bd_addr_t addr){ 5010 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5011 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5012 } 5013 5014 /** 5015 * @brief SSP Passkey Response 5016 * @param addr 5017 * @param passkey 5018 * @return 0 if ok 5019 */ 5020 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5021 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5022 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5023 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5024 } 5025 5026 /** 5027 * @brief Abort SSP Passkey Entry/Pairing 5028 * @param addr 5029 * @param pin 5030 * @return 0 if ok 5031 */ 5032 int gap_ssp_passkey_negative(bd_addr_t addr){ 5033 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5034 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5035 } 5036 5037 /** 5038 * @brief Accept SSP Numeric Comparison 5039 * @param addr 5040 * @param passkey 5041 * @return 0 if ok 5042 */ 5043 int gap_ssp_confirmation_response(bd_addr_t addr){ 5044 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5045 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5046 } 5047 5048 /** 5049 * @brief Abort SSP Numeric Comparison/Pairing 5050 * @param addr 5051 * @param pin 5052 * @return 0 if ok 5053 */ 5054 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5055 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5056 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5057 } 5058 5059 /** 5060 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5061 * @param inquiry_mode see bluetooth_defines.h 5062 */ 5063 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5064 hci_stack->inquiry_mode = mode; 5065 } 5066 5067 /** 5068 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5069 */ 5070 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5071 hci_stack->sco_voice_setting = voice_setting; 5072 } 5073 5074 /** 5075 * @brief Get SCO Voice Setting 5076 * @return current voice setting 5077 */ 5078 uint16_t hci_get_sco_voice_setting(void){ 5079 return hci_stack->sco_voice_setting; 5080 } 5081 5082 static int hci_have_usb_transport(void){ 5083 if (!hci_stack->hci_transport) return 0; 5084 const char * transport_name = hci_stack->hci_transport->name; 5085 if (!transport_name) return 0; 5086 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5087 } 5088 5089 /** @brief Get SCO packet length for current SCO Voice setting 5090 * @note Using SCO packets of the exact length is required for USB transfer 5091 * @return Length of SCO packets in bytes (not audio frames) 5092 */ 5093 int hci_get_sco_packet_length(void){ 5094 int sco_packet_length = 0; 5095 5096 #ifdef ENABLE_SCO_OVER_HCI 5097 5098 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5099 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5100 5101 if (hci_have_usb_transport()){ 5102 // see Core Spec for H2 USB Transfer. 5103 // 3 byte SCO header + 24 bytes per connection 5104 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5105 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5106 } else { 5107 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5108 sco_packet_length = 3 + 60 * multiplier; 5109 // assert that it still fits inside an SCO buffer 5110 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5111 sco_packet_length = 3 + 60; 5112 } 5113 } 5114 #endif 5115 return sco_packet_length; 5116 } 5117 5118 /** 5119 * @brief Sets the master/slave policy 5120 * @param policy (0: attempt to become master, 1: let connecting device decide) 5121 */ 5122 void hci_set_master_slave_policy(uint8_t policy){ 5123 hci_stack->master_slave_policy = policy; 5124 } 5125 5126 #endif 5127 5128 HCI_STATE hci_get_state(void){ 5129 return hci_stack->state; 5130 } 5131 5132 #ifdef ENABLE_CLASSIC 5133 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5134 hci_stack->gap_classic_accept_callback = accept_callback; 5135 } 5136 #endif 5137 5138 /** 5139 * @brief Set callback for Bluetooth Hardware Error 5140 */ 5141 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5142 hci_stack->hardware_error_callback = fn; 5143 } 5144 5145 void hci_disconnect_all(void){ 5146 btstack_linked_list_iterator_t it; 5147 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5148 while (btstack_linked_list_iterator_has_next(&it)){ 5149 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5150 if (con->state == SENT_DISCONNECT) continue; 5151 con->state = SEND_DISCONNECT; 5152 } 5153 hci_run(); 5154 } 5155 5156 uint16_t hci_get_manufacturer(void){ 5157 return hci_stack->manufacturer; 5158 } 5159 5160 #ifdef ENABLE_BLE 5161 5162 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5163 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5164 if (!hci_con) return NULL; 5165 return &hci_con->sm_connection; 5166 } 5167 5168 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5169 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5170 5171 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5172 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5173 if (hci_connection == NULL) return 0; 5174 if (hci_is_le_connection(hci_connection)){ 5175 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5176 if (sm_conn->sm_connection_encrypted) { 5177 return sm_conn->sm_actual_encryption_key_size; 5178 } 5179 } 5180 #ifdef ENABLE_CLASSIC 5181 else { 5182 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5183 return hci_connection->encryption_key_size; 5184 } 5185 } 5186 #endif 5187 return 0; 5188 } 5189 5190 int gap_authenticated(hci_con_handle_t con_handle){ 5191 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5192 if (hci_connection == NULL) return 0; 5193 5194 switch (hci_connection->address_type){ 5195 case BD_ADDR_TYPE_LE_PUBLIC: 5196 case BD_ADDR_TYPE_LE_RANDOM: 5197 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5198 return hci_connection->sm_connection.sm_connection_authenticated; 5199 #ifdef ENABLE_CLASSIC 5200 case BD_ADDR_TYPE_SCO: 5201 case BD_ADDR_TYPE_CLASSIC: 5202 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5203 #endif 5204 default: 5205 return 0; 5206 } 5207 } 5208 5209 int gap_secure_connection(hci_con_handle_t con_handle){ 5210 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5211 if (hci_connection == NULL) return 0; 5212 5213 switch (hci_connection->address_type){ 5214 case BD_ADDR_TYPE_LE_PUBLIC: 5215 case BD_ADDR_TYPE_LE_RANDOM: 5216 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5217 return hci_connection->sm_connection.sm_connection_sc; 5218 #ifdef ENABLE_CLASSIC 5219 case BD_ADDR_TYPE_SCO: 5220 case BD_ADDR_TYPE_CLASSIC: 5221 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5222 #endif 5223 default: 5224 return 0; 5225 } 5226 } 5227 5228 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5229 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5230 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5231 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5232 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5233 return sm_conn->sm_connection_authorization_state; 5234 } 5235 #endif 5236 5237 #ifdef ENABLE_CLASSIC 5238 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){ 5239 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5240 if (!conn) return GAP_CONNECTION_INVALID; 5241 conn->sniff_min_interval = sniff_min_interval; 5242 conn->sniff_max_interval = sniff_max_interval; 5243 conn->sniff_attempt = sniff_attempt; 5244 conn->sniff_timeout = sniff_timeout; 5245 hci_run(); 5246 return 0; 5247 } 5248 5249 /** 5250 * @brief Exit Sniff mode 5251 * @param con_handle 5252 @ @return 0 if ok 5253 */ 5254 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5255 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5256 if (!conn) return GAP_CONNECTION_INVALID; 5257 conn->sniff_min_interval = 0xffff; 5258 hci_run(); 5259 return 0; 5260 } 5261 #endif 5262 5263 void hci_halting_defer(void){ 5264 if (hci_stack->state != HCI_STATE_HALTING) return; 5265 switch (hci_stack->substate){ 5266 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5267 case HCI_HALTING_CLOSE: 5268 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5269 break; 5270 default: 5271 break; 5272 } 5273 } 5274