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 static int hci_have_usb_transport(void); 157 158 #ifdef ENABLE_BLE 159 #ifdef ENABLE_LE_CENTRAL 160 // called from test/ble_client/advertising_data_parser.c 161 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 162 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 163 static hci_connection_t * gap_get_outgoing_connection(void); 164 #endif 165 #endif 166 167 // the STACK is here 168 #ifndef HAVE_MALLOC 169 static hci_stack_t hci_stack_static; 170 #endif 171 static hci_stack_t * hci_stack = NULL; 172 173 #ifdef ENABLE_CLASSIC 174 // default name 175 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 176 177 // test helper 178 static uint8_t disable_l2cap_timeouts = 0; 179 #endif 180 181 /** 182 * create connection for given address 183 * 184 * @return connection OR NULL, if no memory left 185 */ 186 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 187 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 188 hci_connection_t * conn = btstack_memory_hci_connection_get(); 189 if (!conn) return NULL; 190 bd_addr_copy(conn->address, addr); 191 conn->address_type = addr_type; 192 conn->con_handle = 0xffff; 193 conn->authentication_flags = AUTH_FLAGS_NONE; 194 conn->bonding_flags = 0; 195 conn->requested_security_level = LEVEL_0; 196 #ifdef ENABLE_CLASSIC 197 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 198 btstack_run_loop_set_timer_context(&conn->timeout, conn); 199 hci_connection_timestamp(conn); 200 #endif 201 conn->acl_recombination_length = 0; 202 conn->acl_recombination_pos = 0; 203 conn->num_packets_sent = 0; 204 205 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 206 #ifdef ENABLE_BLE 207 conn->le_phy_update_all_phys = 0xff; 208 #endif 209 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 210 return conn; 211 } 212 213 214 /** 215 * get le connection parameter range 216 * 217 * @return le connection parameter range struct 218 */ 219 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 220 *range = hci_stack->le_connection_parameter_range; 221 } 222 223 /** 224 * set le connection parameter range 225 * 226 */ 227 228 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 229 hci_stack->le_connection_parameter_range = *range; 230 } 231 232 /** 233 * @brief Test if connection parameters are inside in existing rage 234 * @param conn_interval_min (unit: 1.25ms) 235 * @param conn_interval_max (unit: 1.25ms) 236 * @param conn_latency 237 * @param supervision_timeout (unit: 10ms) 238 * @returns 1 if included 239 */ 240 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 241 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 242 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 243 244 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 245 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 246 247 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 248 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 249 250 return 1; 251 } 252 253 /** 254 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 255 * @note: default: 1 256 * @param max_peripheral_connections 257 */ 258 #ifdef ENABLE_LE_PERIPHERAL 259 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 260 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 261 } 262 #endif 263 264 /** 265 * get hci connections iterator 266 * 267 * @return hci connections iterator 268 */ 269 270 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 271 btstack_linked_list_iterator_init(it, &hci_stack->connections); 272 } 273 274 /** 275 * get connection for a given handle 276 * 277 * @return connection OR NULL, if not found 278 */ 279 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 280 btstack_linked_list_iterator_t it; 281 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 282 while (btstack_linked_list_iterator_has_next(&it)){ 283 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 284 if ( item->con_handle == con_handle ) { 285 return item; 286 } 287 } 288 return NULL; 289 } 290 291 /** 292 * get connection for given address 293 * 294 * @return connection OR NULL, if not found 295 */ 296 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 297 btstack_linked_list_iterator_t it; 298 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 299 while (btstack_linked_list_iterator_has_next(&it)){ 300 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 301 if (connection->address_type != addr_type) continue; 302 if (memcmp(addr, connection->address, 6) != 0) continue; 303 return connection; 304 } 305 return NULL; 306 } 307 308 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 309 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 310 } 311 312 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 313 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 314 } 315 316 #ifdef ENABLE_CLASSIC 317 318 #ifdef ENABLE_SCO_OVER_HCI 319 static int hci_number_sco_connections(void){ 320 int connections = 0; 321 btstack_linked_list_iterator_t it; 322 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 323 while (btstack_linked_list_iterator_has_next(&it)){ 324 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 325 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 326 connections++; 327 } 328 return connections; 329 } 330 #endif 331 332 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 333 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 334 #ifdef HAVE_EMBEDDED_TICK 335 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 336 // connections might be timed out 337 hci_emit_l2cap_check_timeout(connection); 338 } 339 #else 340 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 341 // connections might be timed out 342 hci_emit_l2cap_check_timeout(connection); 343 } 344 #endif 345 } 346 347 static void hci_connection_timestamp(hci_connection_t *connection){ 348 #ifdef HAVE_EMBEDDED_TICK 349 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 350 #else 351 connection->timestamp = btstack_run_loop_get_time_ms(); 352 #endif 353 } 354 355 /** 356 * add authentication flags and reset timer 357 * @note: assumes classic connection 358 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 359 */ 360 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 361 bd_addr_t addr; 362 reverse_bd_addr(bd_addr, addr); 363 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 364 if (conn) { 365 connectionSetAuthenticationFlags(conn, flags); 366 hci_connection_timestamp(conn); 367 } 368 } 369 370 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 371 hci_connection_t * conn = hci_connection_for_handle(handle); 372 if (!conn) return 0; 373 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 374 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 375 return 0; 376 } 377 378 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 379 if (!hci_stack->link_key_db) return; 380 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 381 hci_stack->link_key_db->delete_link_key(addr); 382 } 383 384 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 385 if (!hci_stack->link_key_db) return; 386 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 387 hci_stack->link_key_db->put_link_key(addr, link_key, type); 388 } 389 390 void gap_delete_all_link_keys(void){ 391 bd_addr_t addr; 392 link_key_t link_key; 393 link_key_type_t type; 394 btstack_link_key_iterator_t it; 395 int ok = gap_link_key_iterator_init(&it); 396 if (!ok) { 397 log_error("could not initialize iterator"); 398 return; 399 } 400 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 401 gap_drop_link_key_for_bd_addr(addr); 402 } 403 gap_link_key_iterator_done(&it); 404 } 405 406 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 407 if (!hci_stack->link_key_db) return 0; 408 if (!hci_stack->link_key_db->iterator_init) return 0; 409 return hci_stack->link_key_db->iterator_init(it); 410 } 411 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){ 412 if (!hci_stack->link_key_db) return 0; 413 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 414 } 415 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 416 if (!hci_stack->link_key_db) return; 417 hci_stack->link_key_db->iterator_done(it); 418 } 419 #endif 420 421 static int hci_is_le_connection(hci_connection_t * connection){ 422 switch (connection->address_type){ 423 case BD_ADDR_TYPE_LE_PUBLIC: 424 case BD_ADDR_TYPE_LE_RANDOM: 425 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 426 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 427 return 1; 428 default: 429 return 0; 430 } 431 } 432 433 /** 434 * count connections 435 */ 436 static int nr_hci_connections(void){ 437 int count = 0; 438 btstack_linked_item_t *it; 439 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 440 return count; 441 } 442 443 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 444 445 unsigned int num_packets_sent_classic = 0; 446 unsigned int num_packets_sent_le = 0; 447 448 btstack_linked_item_t *it; 449 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 450 hci_connection_t * connection = (hci_connection_t *) it; 451 if (hci_is_le_connection(connection)){ 452 num_packets_sent_le += connection->num_packets_sent; 453 } 454 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 455 num_packets_sent_classic += connection->num_packets_sent; 456 } 457 } 458 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 459 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 460 int free_slots_le = 0; 461 462 if (free_slots_classic < 0){ 463 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); 464 return 0; 465 } 466 467 if (hci_stack->le_acl_packets_total_num){ 468 // if we have LE slots, they are used 469 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 470 if (free_slots_le < 0){ 471 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); 472 return 0; 473 } 474 } else { 475 // otherwise, classic slots are used for LE, too 476 free_slots_classic -= num_packets_sent_le; 477 if (free_slots_classic < 0){ 478 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); 479 return 0; 480 } 481 } 482 483 switch (address_type){ 484 case BD_ADDR_TYPE_UNKNOWN: 485 log_error("hci_number_free_acl_slots: unknown address type"); 486 return 0; 487 488 case BD_ADDR_TYPE_CLASSIC: 489 return free_slots_classic; 490 491 default: 492 if (hci_stack->le_acl_packets_total_num){ 493 return free_slots_le; 494 } 495 return free_slots_classic; 496 } 497 } 498 499 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 500 // get connection type 501 hci_connection_t * connection = hci_connection_for_handle(con_handle); 502 if (!connection){ 503 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 504 return 0; 505 } 506 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 507 } 508 509 #ifdef ENABLE_CLASSIC 510 static int hci_number_free_sco_slots(void){ 511 unsigned int num_sco_packets_sent = 0; 512 btstack_linked_item_t *it; 513 if (hci_stack->synchronous_flow_control_enabled){ 514 // explicit flow control 515 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 516 hci_connection_t * connection = (hci_connection_t *) it; 517 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 518 num_sco_packets_sent += connection->num_packets_sent; 519 } 520 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 521 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 522 return 0; 523 } 524 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 525 } else { 526 // implicit flow control -- TODO 527 int num_ready = 0; 528 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 529 hci_connection_t * connection = (hci_connection_t *) it; 530 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 531 if (connection->sco_tx_ready == 0) continue; 532 num_ready++; 533 } 534 return num_ready; 535 } 536 } 537 #endif 538 539 // only used to send HCI Host Number Completed Packets 540 static int hci_can_send_comand_packet_transport(void){ 541 if (hci_stack->hci_packet_buffer_reserved) return 0; 542 543 // check for async hci transport implementations 544 if (hci_stack->hci_transport->can_send_packet_now){ 545 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 546 return 0; 547 } 548 } 549 return 1; 550 } 551 552 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 553 int hci_can_send_command_packet_now(void){ 554 if (hci_can_send_comand_packet_transport() == 0) return 0; 555 return hci_stack->num_cmd_packets > 0; 556 } 557 558 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 559 // check for async hci transport implementations 560 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 561 return hci_stack->hci_transport->can_send_packet_now(packet_type); 562 } 563 564 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 565 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 566 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 567 } 568 569 int hci_can_send_acl_le_packet_now(void){ 570 if (hci_stack->hci_packet_buffer_reserved) return 0; 571 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 572 } 573 574 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 575 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 576 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 577 } 578 579 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 580 if (hci_stack->hci_packet_buffer_reserved) return 0; 581 return hci_can_send_prepared_acl_packet_now(con_handle); 582 } 583 584 #ifdef ENABLE_CLASSIC 585 int hci_can_send_acl_classic_packet_now(void){ 586 if (hci_stack->hci_packet_buffer_reserved) return 0; 587 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 588 } 589 590 int hci_can_send_prepared_sco_packet_now(void){ 591 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 592 if (hci_have_usb_transport()){ 593 return hci_stack->sco_can_send_now; 594 } else { 595 return hci_number_free_sco_slots() > 0; 596 } 597 } 598 599 int hci_can_send_sco_packet_now(void){ 600 if (hci_stack->hci_packet_buffer_reserved) return 0; 601 return hci_can_send_prepared_sco_packet_now(); 602 } 603 604 void hci_request_sco_can_send_now_event(void){ 605 hci_stack->sco_waiting_for_can_send_now = 1; 606 hci_notify_if_sco_can_send_now(); 607 } 608 #endif 609 610 // used for internal checks in l2cap.c 611 int hci_is_packet_buffer_reserved(void){ 612 return hci_stack->hci_packet_buffer_reserved; 613 } 614 615 // reserves outgoing packet buffer. @returns 1 if successful 616 int hci_reserve_packet_buffer(void){ 617 if (hci_stack->hci_packet_buffer_reserved) { 618 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 619 return 0; 620 } 621 hci_stack->hci_packet_buffer_reserved = 1; 622 return 1; 623 } 624 625 void hci_release_packet_buffer(void){ 626 hci_stack->hci_packet_buffer_reserved = 0; 627 } 628 629 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 630 static int hci_transport_synchronous(void){ 631 return hci_stack->hci_transport->can_send_packet_now == NULL; 632 } 633 634 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 635 636 // 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); 637 638 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 639 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 640 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 641 max_acl_data_packet_length = hci_stack->le_data_packets_length; 642 } 643 644 // testing: reduce buffer to minimum 645 // max_acl_data_packet_length = 52; 646 647 log_debug("hci_send_acl_packet_fragments entered"); 648 649 int err; 650 // multiple packets could be send on a synchronous HCI transport 651 while (1){ 652 653 log_debug("hci_send_acl_packet_fragments loop entered"); 654 655 // get current data 656 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 657 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 658 int more_fragments = 0; 659 660 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 661 if (current_acl_data_packet_length > max_acl_data_packet_length){ 662 more_fragments = 1; 663 current_acl_data_packet_length = max_acl_data_packet_length; 664 } 665 666 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 667 if (acl_header_pos > 0){ 668 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 669 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 670 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 671 } 672 673 // update header len 674 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 675 676 // count packet 677 connection->num_packets_sent++; 678 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 679 680 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 681 if (more_fragments){ 682 // update start of next fragment to send 683 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 684 } else { 685 // done 686 hci_stack->acl_fragmentation_pos = 0; 687 hci_stack->acl_fragmentation_total_size = 0; 688 } 689 690 // send packet 691 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 692 const int size = current_acl_data_packet_length + 4; 693 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 694 hci_stack->acl_fragmentation_tx_active = 1; 695 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 696 697 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 698 699 // done yet? 700 if (!more_fragments) break; 701 702 // can send more? 703 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 704 } 705 706 log_debug("hci_send_acl_packet_fragments loop over"); 707 708 // release buffer now for synchronous transport 709 if (hci_transport_synchronous()){ 710 hci_stack->acl_fragmentation_tx_active = 0; 711 hci_release_packet_buffer(); 712 hci_emit_transport_packet_sent(); 713 } 714 715 return err; 716 } 717 718 // pre: caller has reserved the packet buffer 719 int hci_send_acl_packet_buffer(int size){ 720 721 // log_info("hci_send_acl_packet_buffer size %u", size); 722 723 if (!hci_stack->hci_packet_buffer_reserved) { 724 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 725 return 0; 726 } 727 728 uint8_t * packet = hci_stack->hci_packet_buffer; 729 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 730 731 // check for free places on Bluetooth module 732 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 733 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 734 hci_release_packet_buffer(); 735 hci_emit_transport_packet_sent(); 736 return BTSTACK_ACL_BUFFERS_FULL; 737 } 738 739 hci_connection_t *connection = hci_connection_for_handle( con_handle); 740 if (!connection) { 741 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 742 hci_release_packet_buffer(); 743 hci_emit_transport_packet_sent(); 744 return 0; 745 } 746 747 #ifdef ENABLE_CLASSIC 748 hci_connection_timestamp(connection); 749 #endif 750 751 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 752 753 // setup data 754 hci_stack->acl_fragmentation_total_size = size; 755 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 756 757 return hci_send_acl_packet_fragments(connection); 758 } 759 760 #ifdef ENABLE_CLASSIC 761 // pre: caller has reserved the packet buffer 762 int hci_send_sco_packet_buffer(int size){ 763 764 // log_info("hci_send_acl_packet_buffer size %u", size); 765 766 if (!hci_stack->hci_packet_buffer_reserved) { 767 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 768 return 0; 769 } 770 771 uint8_t * packet = hci_stack->hci_packet_buffer; 772 773 // skip checks in loopback mode 774 if (!hci_stack->loopback_mode){ 775 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 776 777 // check for free places on Bluetooth module 778 if (!hci_can_send_prepared_sco_packet_now()) { 779 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 780 hci_release_packet_buffer(); 781 hci_emit_transport_packet_sent(); 782 return BTSTACK_ACL_BUFFERS_FULL; 783 } 784 785 // track send packet in connection struct 786 hci_connection_t *connection = hci_connection_for_handle( con_handle); 787 if (!connection) { 788 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 789 hci_release_packet_buffer(); 790 hci_emit_transport_packet_sent(); 791 return 0; 792 } 793 794 if (hci_have_usb_transport()){ 795 // token used 796 hci_stack->sco_can_send_now = 0; 797 } else { 798 if (hci_stack->synchronous_flow_control_enabled){ 799 connection->num_packets_sent++; 800 } else { 801 connection->sco_tx_ready--; 802 } 803 } 804 } 805 806 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 807 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 808 809 if (hci_transport_synchronous()){ 810 hci_release_packet_buffer(); 811 hci_emit_transport_packet_sent(); 812 } 813 814 return err; 815 } 816 #endif 817 818 static void acl_handler(uint8_t *packet, int size){ 819 820 // log_info("acl_handler: size %u", size); 821 822 // get info 823 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 824 hci_connection_t *conn = hci_connection_for_handle(con_handle); 825 uint8_t acl_flags = READ_ACL_FLAGS(packet); 826 uint16_t acl_length = READ_ACL_LENGTH(packet); 827 828 // ignore non-registered handle 829 if (!conn){ 830 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 831 return; 832 } 833 834 // assert packet is complete 835 if (acl_length + 4 != size){ 836 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 837 return; 838 } 839 840 #ifdef ENABLE_CLASSIC 841 // update idle timestamp 842 hci_connection_timestamp(conn); 843 #endif 844 845 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 846 hci_stack->host_completed_packets = 1; 847 conn->num_packets_completed++; 848 #endif 849 850 // handle different packet types 851 switch (acl_flags & 0x03) { 852 853 case 0x01: // continuation fragment 854 855 // sanity checks 856 if (conn->acl_recombination_pos == 0) { 857 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 858 return; 859 } 860 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 861 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 862 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 863 conn->acl_recombination_pos = 0; 864 return; 865 } 866 867 // append fragment payload (header already stored) 868 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 869 conn->acl_recombination_pos += acl_length; 870 871 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 872 // conn->acl_recombination_pos, conn->acl_recombination_length); 873 874 // forward complete L2CAP packet if complete. 875 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 876 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 877 // reset recombination buffer 878 conn->acl_recombination_length = 0; 879 conn->acl_recombination_pos = 0; 880 } 881 break; 882 883 case 0x02: { // first fragment 884 885 // sanity check 886 if (conn->acl_recombination_pos) { 887 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 888 conn->acl_recombination_pos = 0; 889 } 890 891 // peek into L2CAP packet! 892 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 893 894 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 895 896 // compare fragment size to L2CAP packet size 897 if (acl_length >= l2cap_length + 4){ 898 // forward fragment as L2CAP packet 899 hci_emit_acl_packet(packet, acl_length + 4); 900 } else { 901 902 if (acl_length > HCI_ACL_BUFFER_SIZE){ 903 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 904 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 905 return; 906 } 907 908 // store first fragment and tweak acl length for complete package 909 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 910 conn->acl_recombination_pos = acl_length + 4; 911 conn->acl_recombination_length = l2cap_length; 912 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 913 } 914 break; 915 916 } 917 default: 918 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 919 return; 920 } 921 922 // execute main loop 923 hci_run(); 924 } 925 926 static void hci_shutdown_connection(hci_connection_t *conn){ 927 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 928 929 #ifdef ENABLE_CLASSIC 930 #ifdef ENABLE_SCO_OVER_HCI 931 int addr_type = conn->address_type; 932 #endif 933 #endif 934 935 btstack_run_loop_remove_timer(&conn->timeout); 936 937 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 938 btstack_memory_hci_connection_free( conn ); 939 940 // now it's gone 941 hci_emit_nr_connections_changed(); 942 943 #ifdef ENABLE_CLASSIC 944 #ifdef ENABLE_SCO_OVER_HCI 945 // update SCO 946 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 947 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 948 } 949 #endif 950 #endif 951 } 952 953 #ifdef ENABLE_CLASSIC 954 955 static const uint16_t packet_type_sizes[] = { 956 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 957 HCI_ACL_DH1_SIZE, 0, 0, 0, 958 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 959 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 960 }; 961 static const uint8_t packet_type_feature_requirement_bit[] = { 962 0, // 3 slot packets 963 1, // 5 slot packets 964 25, // EDR 2 mpbs 965 26, // EDR 3 mbps 966 39, // 3 slot EDR packts 967 40, // 5 slot EDR packet 968 }; 969 static const uint16_t packet_type_feature_packet_mask[] = { 970 0x0f00, // 3 slot packets 971 0xf000, // 5 slot packets 972 0x1102, // EDR 2 mpbs 973 0x2204, // EDR 3 mbps 974 0x0300, // 3 slot EDR packts 975 0x3000, // 5 slot EDR packet 976 }; 977 978 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 979 // enable packet types based on size 980 uint16_t packet_types = 0; 981 unsigned int i; 982 for (i=0;i<16;i++){ 983 if (packet_type_sizes[i] == 0) continue; 984 if (packet_type_sizes[i] <= buffer_size){ 985 packet_types |= 1 << i; 986 } 987 } 988 // disable packet types due to missing local supported features 989 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 990 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 991 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 992 if (feature_set) continue; 993 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 994 packet_types &= ~packet_type_feature_packet_mask[i]; 995 } 996 // flip bits for "may not be used" 997 packet_types ^= 0x3306; 998 return packet_types; 999 } 1000 1001 uint16_t hci_usable_acl_packet_types(void){ 1002 return hci_stack->packet_types; 1003 } 1004 #endif 1005 1006 uint8_t* hci_get_outgoing_packet_buffer(void){ 1007 // hci packet buffer is >= acl data packet length 1008 return hci_stack->hci_packet_buffer; 1009 } 1010 1011 uint16_t hci_max_acl_data_packet_length(void){ 1012 return hci_stack->acl_data_packet_length; 1013 } 1014 1015 #ifdef ENABLE_CLASSIC 1016 int hci_extended_sco_link_supported(void){ 1017 // No. 31, byte 3, bit 7 1018 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1019 } 1020 #endif 1021 1022 int hci_non_flushable_packet_boundary_flag_supported(void){ 1023 // No. 54, byte 6, bit 6 1024 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 1025 } 1026 1027 static int gap_ssp_supported(void){ 1028 // No. 51, byte 6, bit 3 1029 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 1030 } 1031 1032 static int hci_classic_supported(void){ 1033 #ifdef ENABLE_CLASSIC 1034 // No. 37, byte 4, bit 5, = No BR/EDR Support 1035 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1036 #else 1037 return 0; 1038 #endif 1039 } 1040 1041 static int hci_le_supported(void){ 1042 #ifdef ENABLE_BLE 1043 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1044 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1045 #else 1046 return 0; 1047 #endif 1048 } 1049 1050 #ifdef ENABLE_BLE 1051 1052 /** 1053 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1054 */ 1055 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1056 *addr_type = hci_stack->le_own_addr_type; 1057 if (hci_stack->le_own_addr_type){ 1058 memcpy(addr, hci_stack->le_random_address, 6); 1059 } else { 1060 memcpy(addr, hci_stack->local_bd_addr, 6); 1061 } 1062 } 1063 1064 #ifdef ENABLE_LE_CENTRAL 1065 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1066 1067 int offset = 3; 1068 int num_reports = packet[offset]; 1069 offset += 1; 1070 1071 int i; 1072 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1073 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1074 for (i=0; i<num_reports && offset < size;i++){ 1075 // sanity checks on data_length: 1076 uint8_t data_length = packet[offset + 8]; 1077 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1078 if (offset + 9 + data_length + 1 > size) return; 1079 // setup event 1080 uint8_t event_size = 10 + data_length; 1081 int pos = 0; 1082 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1083 event[pos++] = event_size; 1084 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 1085 offset += 8; 1086 pos += 8; 1087 event[pos++] = packet[offset + 1 + data_length]; // rssi 1088 event[pos++] = data_length; 1089 offset++; 1090 memcpy(&event[pos], &packet[offset], data_length); 1091 pos += data_length; 1092 offset += data_length + 1; // rssi 1093 hci_emit_event(event, pos, 1); 1094 } 1095 } 1096 #endif 1097 #endif 1098 1099 #ifdef ENABLE_BLE 1100 #ifdef ENABLE_LE_PERIPHERAL 1101 static void hci_reenable_advertisements_if_needed(void){ 1102 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1103 // get number of active le slave connections 1104 int num_slave_connections = 0; 1105 btstack_linked_list_iterator_t it; 1106 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1107 while (btstack_linked_list_iterator_has_next(&it)){ 1108 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1109 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1110 if (con->state != OPEN) continue; 1111 if (con->role != HCI_ROLE_SLAVE) continue; 1112 if (!hci_is_le_connection(con)) continue; 1113 num_slave_connections++; 1114 } 1115 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1116 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1117 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1118 } 1119 } 1120 } 1121 #endif 1122 #endif 1123 1124 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1125 1126 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1127 if (!hci_stack->config) return 0; 1128 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1129 // Limit baud rate for Broadcom chipsets to 3 mbps 1130 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 1131 baud_rate = 3000000; 1132 } 1133 return baud_rate; 1134 } 1135 1136 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1137 UNUSED(ds); 1138 1139 switch (hci_stack->substate){ 1140 case HCI_INIT_W4_SEND_RESET: 1141 log_info("Resend HCI Reset"); 1142 hci_stack->substate = HCI_INIT_SEND_RESET; 1143 hci_stack->num_cmd_packets = 1; 1144 hci_run(); 1145 break; 1146 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1147 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1148 if (hci_stack->hci_transport->reset_link){ 1149 hci_stack->hci_transport->reset_link(); 1150 } 1151 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1152 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1153 log_info("Resend HCI Reset - CSR Warm Boot"); 1154 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1155 hci_stack->num_cmd_packets = 1; 1156 hci_run(); 1157 break; 1158 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1159 if (hci_stack->hci_transport->set_baudrate){ 1160 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1161 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1162 hci_stack->hci_transport->set_baudrate(baud_rate); 1163 } 1164 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1165 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1166 if (hci_stack->hci_transport->reset_link){ 1167 log_info("Link Reset"); 1168 hci_stack->hci_transport->reset_link(); 1169 } 1170 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1171 hci_run(); 1172 } 1173 break; 1174 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1175 // otherwise continue 1176 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1177 hci_send_cmd(&hci_read_local_supported_commands); 1178 break; 1179 default: 1180 break; 1181 } 1182 } 1183 #endif 1184 1185 static void hci_initializing_next_state(void){ 1186 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1187 } 1188 1189 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_PERIPHERAL) 1190 static void hci_replace_bd_addr_placeholder(uint8_t * data, uint16_t size){ 1191 const int bd_addr_string_len = 17; 1192 int i = 0; 1193 while (i < size - bd_addr_string_len){ 1194 if (memcmp(&data[i], "00:00:00:00:00:00", bd_addr_string_len)) { 1195 i++; 1196 continue; 1197 } 1198 // set real address 1199 memcpy(&data[i], bd_addr_to_str(hci_stack->local_bd_addr), bd_addr_string_len); 1200 i += bd_addr_string_len; 1201 } 1202 } 1203 #endif 1204 1205 // assumption: hci_can_send_command_packet_now() == true 1206 static void hci_initializing_run(void){ 1207 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1208 switch (hci_stack->substate){ 1209 case HCI_INIT_SEND_RESET: 1210 hci_state_reset(); 1211 1212 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1213 // prepare reset if command complete not received in 100ms 1214 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1215 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1216 btstack_run_loop_add_timer(&hci_stack->timeout); 1217 #endif 1218 // send command 1219 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1220 hci_send_cmd(&hci_reset); 1221 break; 1222 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1223 hci_send_cmd(&hci_read_local_version_information); 1224 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1225 break; 1226 case HCI_INIT_SEND_READ_LOCAL_NAME: 1227 hci_send_cmd(&hci_read_local_name); 1228 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1229 break; 1230 1231 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1232 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1233 hci_state_reset(); 1234 // prepare reset if command complete not received in 100ms 1235 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1236 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1237 btstack_run_loop_add_timer(&hci_stack->timeout); 1238 // send command 1239 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1240 hci_send_cmd(&hci_reset); 1241 break; 1242 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1243 hci_state_reset(); 1244 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1245 hci_send_cmd(&hci_reset); 1246 break; 1247 case HCI_INIT_SEND_BAUD_CHANGE: { 1248 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1249 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1250 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1251 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1252 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1253 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1254 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1255 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1256 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1257 btstack_run_loop_add_timer(&hci_stack->timeout); 1258 } 1259 break; 1260 } 1261 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1262 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1263 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1264 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1265 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1266 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1267 break; 1268 } 1269 case HCI_INIT_CUSTOM_INIT: 1270 // Custom initialization 1271 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1272 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1273 int send_cmd = 0; 1274 switch (hci_stack->chipset_result){ 1275 case BTSTACK_CHIPSET_VALID_COMMAND: 1276 send_cmd = 1; 1277 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1278 break; 1279 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1280 send_cmd = 1; 1281 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1282 log_info("CSR Warm Boot"); 1283 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1284 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1285 btstack_run_loop_add_timer(&hci_stack->timeout); 1286 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1287 && hci_stack->config 1288 && hci_stack->chipset 1289 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1290 && hci_stack->hci_transport->set_baudrate 1291 && hci_transport_uart_get_main_baud_rate()){ 1292 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1293 } else { 1294 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1295 } 1296 break; 1297 default: 1298 break; 1299 } 1300 1301 if (send_cmd){ 1302 int size = 3 + hci_stack->hci_packet_buffer[2]; 1303 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1304 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1305 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1306 break; 1307 } 1308 log_info("Init script done"); 1309 1310 // Init script download on Broadcom chipsets causes: 1311 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1312 ( hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION 1313 || hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA) ){ 1314 1315 // - baud rate to reset, restore UART baud rate if needed 1316 int need_baud_change = hci_stack->config 1317 && hci_stack->chipset 1318 && hci_stack->chipset->set_baudrate_command 1319 && hci_stack->hci_transport->set_baudrate 1320 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1321 if (need_baud_change) { 1322 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1323 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1324 hci_stack->hci_transport->set_baudrate(baud_rate); 1325 } 1326 1327 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1328 // -> Work around: wait a few milliseconds here. 1329 log_info("BCM delay after init script"); 1330 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1331 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1332 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1333 btstack_run_loop_add_timer(&hci_stack->timeout); 1334 break; 1335 } 1336 } 1337 // otherwise continue 1338 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1339 hci_send_cmd(&hci_read_local_supported_commands); 1340 break; 1341 case HCI_INIT_SET_BD_ADDR: 1342 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1343 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1344 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1345 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1346 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1347 break; 1348 #endif 1349 1350 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1351 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1352 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1353 hci_send_cmd(&hci_read_local_supported_commands); 1354 break; 1355 case HCI_INIT_READ_BD_ADDR: 1356 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1357 hci_send_cmd(&hci_read_bd_addr); 1358 break; 1359 case HCI_INIT_READ_BUFFER_SIZE: 1360 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1361 hci_send_cmd(&hci_read_buffer_size); 1362 break; 1363 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1364 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1365 hci_send_cmd(&hci_read_local_supported_features); 1366 break; 1367 1368 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1369 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1370 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1371 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1372 break; 1373 case HCI_INIT_HOST_BUFFER_SIZE: 1374 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1375 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1376 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1377 break; 1378 #endif 1379 1380 case HCI_INIT_SET_EVENT_MASK: 1381 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1382 if (hci_le_supported()){ 1383 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1384 } else { 1385 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1386 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1387 } 1388 break; 1389 1390 #ifdef ENABLE_CLASSIC 1391 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1392 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1393 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1394 break; 1395 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1396 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1397 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1398 break; 1399 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1400 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1401 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1402 break; 1403 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1404 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1405 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1406 break; 1407 case HCI_INIT_WRITE_LOCAL_NAME: { 1408 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1409 hci_reserve_packet_buffer(); 1410 uint8_t * packet = hci_stack->hci_packet_buffer; 1411 // construct HCI Command and send 1412 uint16_t opcode = hci_write_local_name.opcode; 1413 hci_stack->last_cmd_opcode = opcode; 1414 packet[0] = opcode & 0xff; 1415 packet[1] = opcode >> 8; 1416 packet[2] = DEVICE_NAME_LEN; 1417 memset(&packet[3], 0, DEVICE_NAME_LEN); 1418 memcpy(&packet[3], hci_stack->local_name, strlen(hci_stack->local_name)); 1419 // expand '00:00:00:00:00:00' in name with bd_addr 1420 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1421 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1422 break; 1423 } 1424 case HCI_INIT_WRITE_EIR_DATA: { 1425 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1426 hci_reserve_packet_buffer(); 1427 uint8_t * packet = hci_stack->hci_packet_buffer; 1428 // construct HCI Command and send 1429 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1430 hci_stack->last_cmd_opcode = opcode; 1431 packet[0] = opcode & 0xff; 1432 packet[1] = opcode >> 8; 1433 packet[2] = 1 + 240; 1434 packet[3] = 0; // FEC not required 1435 if (hci_stack->eir_data){ 1436 memcpy(&packet[4], hci_stack->eir_data, 240); 1437 } else { 1438 memset(&packet[4], 0, 240); 1439 int name_len = strlen(hci_stack->local_name); 1440 packet[4] = name_len + 1; 1441 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1442 memcpy(&packet[6], hci_stack->local_name, name_len); 1443 } 1444 // expand '00:00:00:00:00:00' in name with bd_addr 1445 hci_replace_bd_addr_placeholder(&packet[4], 240); 1446 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1447 break; 1448 } 1449 case HCI_INIT_WRITE_INQUIRY_MODE: 1450 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1451 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1452 break; 1453 case HCI_INIT_WRITE_SCAN_ENABLE: 1454 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1455 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1456 break; 1457 // only sent if ENABLE_SCO_OVER_HCI is defined 1458 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1459 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1460 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1461 break; 1462 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1463 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1464 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1465 break; 1466 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1467 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1468 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1469 log_info("BCM: Route SCO data via HCI transport"); 1470 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1471 break; 1472 1473 #endif 1474 #ifdef ENABLE_BLE 1475 // LE INIT 1476 case HCI_INIT_LE_READ_BUFFER_SIZE: 1477 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1478 hci_send_cmd(&hci_le_read_buffer_size); 1479 break; 1480 case HCI_INIT_LE_SET_EVENT_MASK: 1481 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1482 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1483 break; 1484 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1485 // LE Supported Host = 1, Simultaneous Host = 0 1486 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1487 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1488 break; 1489 #endif 1490 1491 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1492 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1493 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1494 hci_send_cmd(&hci_le_read_maximum_data_length); 1495 break; 1496 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1497 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1498 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1499 break; 1500 #endif 1501 1502 #ifdef ENABLE_LE_CENTRAL 1503 case HCI_INIT_READ_WHITE_LIST_SIZE: 1504 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1505 hci_send_cmd(&hci_le_read_white_list_size); 1506 break; 1507 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1508 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1509 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1510 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); 1511 break; 1512 #endif 1513 default: 1514 return; 1515 } 1516 } 1517 1518 static void hci_init_done(void){ 1519 // done. tell the app 1520 log_info("hci_init_done -> HCI_STATE_WORKING"); 1521 hci_stack->state = HCI_STATE_WORKING; 1522 hci_emit_state(); 1523 hci_run(); 1524 } 1525 1526 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1527 1528 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1529 1530 uint8_t command_completed = 0; 1531 1532 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1533 uint16_t opcode = little_endian_read_16(packet,3); 1534 if (opcode == hci_stack->last_cmd_opcode){ 1535 command_completed = 1; 1536 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1537 } else { 1538 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1539 } 1540 } 1541 1542 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1543 uint8_t status = packet[2]; 1544 uint16_t opcode = little_endian_read_16(packet,4); 1545 if (opcode == hci_stack->last_cmd_opcode){ 1546 if (status){ 1547 command_completed = 1; 1548 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1549 } else { 1550 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1551 } 1552 } else { 1553 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1554 } 1555 } 1556 1557 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1558 1559 // Vendor == CSR 1560 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1561 // TODO: track actual command 1562 command_completed = 1; 1563 } 1564 1565 // Vendor == Toshiba 1566 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1567 // TODO: track actual command 1568 command_completed = 1; 1569 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1570 hci_stack->num_cmd_packets = 1; 1571 } 1572 1573 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1574 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1575 // 1576 // HCI Reset 1577 // Timeout 100 ms 1578 // HCI Reset 1579 // Command Complete Reset 1580 // HCI Read Local Version Information 1581 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1582 // hang... 1583 // 1584 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1585 if (!command_completed 1586 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1587 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1588 1589 uint16_t opcode = little_endian_read_16(packet,3); 1590 if (opcode == hci_reset.opcode){ 1591 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1592 return; 1593 } 1594 } 1595 1596 // CSR & H5 1597 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1598 if (!command_completed 1599 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1600 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1601 1602 uint16_t opcode = little_endian_read_16(packet,3); 1603 if (opcode == hci_reset.opcode){ 1604 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1605 return; 1606 } 1607 } 1608 1609 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1610 // fix: Correct substate and behave as command below 1611 if (command_completed){ 1612 switch (hci_stack->substate){ 1613 case HCI_INIT_SEND_RESET: 1614 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1615 break; 1616 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1617 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1618 break; 1619 default: 1620 break; 1621 } 1622 } 1623 1624 #endif 1625 1626 if (!command_completed) return; 1627 1628 int need_baud_change = 0; 1629 int need_addr_change = 0; 1630 1631 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1632 need_baud_change = hci_stack->config 1633 && hci_stack->chipset 1634 && hci_stack->chipset->set_baudrate_command 1635 && hci_stack->hci_transport->set_baudrate 1636 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1637 1638 need_addr_change = hci_stack->custom_bd_addr_set 1639 && hci_stack->chipset 1640 && hci_stack->chipset->set_bd_addr_command; 1641 #endif 1642 1643 switch(hci_stack->substate){ 1644 1645 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1646 case HCI_INIT_SEND_RESET: 1647 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1648 // fix: just correct substate and behave as command below 1649 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1650 btstack_run_loop_remove_timer(&hci_stack->timeout); 1651 break; 1652 case HCI_INIT_W4_SEND_RESET: 1653 btstack_run_loop_remove_timer(&hci_stack->timeout); 1654 break; 1655 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1656 log_info("Received local name, need baud change %d", need_baud_change); 1657 if (need_baud_change){ 1658 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1659 return; 1660 } 1661 // skip baud change 1662 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1663 return; 1664 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1665 // for STLC2500D, baud rate change already happened. 1666 // for others, baud rate gets changed now 1667 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1668 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1669 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1670 hci_stack->hci_transport->set_baudrate(baud_rate); 1671 } 1672 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1673 return; 1674 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1675 btstack_run_loop_remove_timer(&hci_stack->timeout); 1676 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1677 return; 1678 case HCI_INIT_W4_CUSTOM_INIT: 1679 // repeat custom init 1680 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1681 return; 1682 #else 1683 case HCI_INIT_W4_SEND_RESET: 1684 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1685 return ; 1686 #endif 1687 1688 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1689 if (need_baud_change && hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT && 1690 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1691 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1692 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1693 return; 1694 } 1695 if (need_addr_change){ 1696 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1697 return; 1698 } 1699 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1700 return; 1701 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1702 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1703 if (need_baud_change){ 1704 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1705 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1706 hci_stack->hci_transport->set_baudrate(baud_rate); 1707 } 1708 if (need_addr_change){ 1709 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1710 return; 1711 } 1712 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1713 return; 1714 case HCI_INIT_W4_SET_BD_ADDR: 1715 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1716 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1717 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1718 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1719 return; 1720 } 1721 // skipping st warm boot 1722 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1723 return; 1724 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1725 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1726 return; 1727 #endif 1728 case HCI_INIT_W4_READ_BD_ADDR: 1729 // only read buffer size if supported 1730 if (hci_stack->local_supported_commands[0] & 0x01) { 1731 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1732 return; 1733 } 1734 // skipping read buffer size 1735 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1736 return; 1737 case HCI_INIT_W4_SET_EVENT_MASK: 1738 // skip Classic init commands for LE only chipsets 1739 if (!hci_classic_supported()){ 1740 #ifdef ENABLE_BLE 1741 if (hci_le_supported()){ 1742 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1743 return; 1744 } 1745 #endif 1746 log_error("Neither BR/EDR nor LE supported"); 1747 hci_init_done(); 1748 return; 1749 } 1750 if (!gap_ssp_supported()){ 1751 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1752 return; 1753 } 1754 break; 1755 #ifdef ENABLE_BLE 1756 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1757 // skip write le host if not supported (e.g. on LE only EM9301) 1758 if (hci_stack->local_supported_commands[0] & 0x02) break; 1759 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1760 return; 1761 1762 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1763 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1764 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1765 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1766 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1767 return; 1768 } 1769 // explicit fall through to reduce repetitions 1770 1771 #ifdef ENABLE_LE_CENTRAL 1772 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1773 #else 1774 hci_init_done(); 1775 #endif 1776 return; 1777 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1778 1779 #endif /* ENABLE_BLE */ 1780 1781 #ifdef ENABLE_SCO_OVER_HCI 1782 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1783 // skip write synchronous flow control if not supported 1784 if (hci_stack->local_supported_commands[0] & 0x04) break; 1785 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1786 // explicit fall through to reduce repetitions 1787 1788 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1789 // skip write default erroneous data reporting if not supported 1790 if (hci_stack->local_supported_commands[0] & 0x08) break; 1791 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1792 // explicit fall through to reduce repetitions 1793 1794 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1795 // skip bcm set sco pcm config on non-Broadcom chipsets 1796 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1797 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1798 // explicit fall through to reduce repetitions 1799 1800 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1801 if (!hci_le_supported()){ 1802 // SKIP LE init for Classic only configuration 1803 hci_init_done(); 1804 return; 1805 } 1806 break; 1807 1808 #else /* !ENABLE_SCO_OVER_HCI */ 1809 1810 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1811 #ifdef ENABLE_BLE 1812 if (hci_le_supported()){ 1813 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1814 return; 1815 } 1816 #endif 1817 // SKIP LE init for Classic only configuration 1818 hci_init_done(); 1819 return; 1820 #endif /* ENABLE_SCO_OVER_HCI */ 1821 1822 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1823 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1824 // Response to command before init done state -> init done 1825 case (HCI_INIT_DONE-1): 1826 hci_init_done(); 1827 return; 1828 #endif 1829 1830 default: 1831 break; 1832 } 1833 hci_initializing_next_state(); 1834 } 1835 1836 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1837 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1838 bd_addr_t bd_address; 1839 memcpy(&bd_address, conn->address, 6); 1840 1841 #ifdef ENABLE_CLASSIC 1842 // cache needed data 1843 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1844 #endif 1845 1846 // connection failed, remove entry 1847 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1848 btstack_memory_hci_connection_free( conn ); 1849 1850 #ifdef ENABLE_CLASSIC 1851 // notify client if dedicated bonding 1852 if (notify_dedicated_bonding_failed){ 1853 log_info("hci notify_dedicated_bonding_failed"); 1854 hci_emit_dedicated_bonding_result(bd_address, status); 1855 } 1856 1857 // if authentication error, also delete link key 1858 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1859 gap_drop_link_key_for_bd_addr(bd_address); 1860 } 1861 #endif 1862 } 1863 1864 static void event_handler(uint8_t *packet, int size){ 1865 1866 uint16_t event_length = packet[1]; 1867 1868 // assert packet is complete 1869 if (size != event_length + 2){ 1870 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1871 return; 1872 } 1873 1874 bd_addr_t addr; 1875 bd_addr_type_t addr_type; 1876 hci_con_handle_t handle; 1877 hci_connection_t * conn; 1878 int i; 1879 int create_connection_cmd; 1880 1881 #ifdef ENABLE_CLASSIC 1882 uint8_t link_type; 1883 #endif 1884 1885 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1886 1887 switch (hci_event_packet_get_type(packet)) { 1888 1889 case HCI_EVENT_COMMAND_COMPLETE: 1890 // get num cmd packets - limit to 1 to reduce complexity 1891 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1892 1893 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1894 if (packet[5]) break; 1895 // terminate, name 248 chars 1896 packet[6+248] = 0; 1897 log_info("local name: %s", &packet[6]); 1898 } 1899 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1900 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1901 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1902 uint16_t acl_len = little_endian_read_16(packet, 6); 1903 uint16_t sco_len = packet[8]; 1904 1905 // determine usable ACL/SCO payload size 1906 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1907 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1908 1909 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1910 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1911 1912 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1913 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1914 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1915 } 1916 } 1917 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_rssi)){ 1918 if (packet[5] == 0){ 1919 uint8_t event[5]; 1920 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 1921 event[1] = 3; 1922 memcpy(&event[2], &packet[6], 3); 1923 hci_emit_event(event, sizeof(event), 1); 1924 } 1925 } 1926 #ifdef ENABLE_BLE 1927 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1928 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1929 hci_stack->le_acl_packets_total_num = packet[8]; 1930 // determine usable ACL payload size 1931 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1932 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1933 } 1934 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1935 } 1936 #endif 1937 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1938 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1939 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1940 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1941 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); 1942 } 1943 #endif 1944 #ifdef ENABLE_LE_CENTRAL 1945 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1946 hci_stack->le_whitelist_capacity = packet[6]; 1947 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1948 } 1949 #endif 1950 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1951 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1952 hci_stack->local_bd_addr); 1953 log_info("Local Address, Status: 0x%02x: Addr: %s", 1954 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1955 #ifdef ENABLE_CLASSIC 1956 if (hci_stack->link_key_db){ 1957 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1958 } 1959 #endif 1960 } 1961 #ifdef ENABLE_CLASSIC 1962 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1963 hci_emit_discoverable_enabled(hci_stack->discoverable); 1964 } 1965 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1966 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1967 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1968 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1969 hci_emit_event(event, sizeof(event), 1); 1970 } 1971 } 1972 #endif 1973 1974 // Note: HCI init checks 1975 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1976 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1977 1978 #ifdef ENABLE_CLASSIC 1979 // determine usable ACL packet types based on host buffer size and supported features 1980 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1981 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1982 #endif 1983 // Classic/LE 1984 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1985 } 1986 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1987 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1988 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1989 uint16_t manufacturer = little_endian_read_16(packet, 10); 1990 // map Cypress to Broadcom 1991 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 1992 log_info("Treat Cypress as Broadcom"); 1993 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 1994 little_endian_store_16(packet, 10, manufacturer); 1995 } 1996 hci_stack->manufacturer = manufacturer; 1997 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1998 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1999 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2000 } 2001 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 2002 hci_stack->local_supported_commands[0] = 2003 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2004 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2005 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2006 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2007 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2008 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2 | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2009 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1; // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2010 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 2011 } 2012 #ifdef ENABLE_CLASSIC 2013 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 2014 if (packet[5] == 0){ 2015 hci_stack->synchronous_flow_control_enabled = 1; 2016 } 2017 } 2018 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_encryption_key_size)){ 2019 uint8_t status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2020 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2021 conn = hci_connection_for_handle(handle); 2022 if (!conn) break; 2023 if (status == 0){ 2024 uint8_t key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2025 log_info("Handle %x04x key Size: %u", handle, key_size); 2026 conn->encryption_key_size = key_size; 2027 } else { 2028 log_info("Read Encryption Key Size failed -> assuming insecure connection with key size of 1"); 2029 conn->encryption_key_size = 1; 2030 } 2031 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2032 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2033 } 2034 #endif 2035 break; 2036 2037 case HCI_EVENT_COMMAND_STATUS: 2038 // get num cmd packets - limit to 1 to reduce complexity 2039 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2040 2041 // check command status to detected failed outgoing connections 2042 create_connection_cmd = 0; 2043 #ifdef ENABLE_CLASSIC 2044 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2045 create_connection_cmd = 1; 2046 } 2047 #endif 2048 #ifdef ENABLE_LE_CENTRAL 2049 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2050 create_connection_cmd = 1; 2051 } 2052 #endif 2053 if (create_connection_cmd) { 2054 uint8_t status = hci_event_command_status_get_status(packet); 2055 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2056 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); 2057 2058 // reset outgoing address info 2059 memset(hci_stack->outgoing_addr, 0, 6); 2060 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2061 2062 // error => outgoing connection failed 2063 if ((conn != NULL) && (status != 0)){ 2064 hci_handle_connection_failed(conn, status); 2065 } 2066 } 2067 break; 2068 2069 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2070 int offset = 3; 2071 for (i=0; i<packet[2];i++){ 2072 handle = little_endian_read_16(packet, offset) & 0x0fff; 2073 offset += 2; 2074 uint16_t num_packets = little_endian_read_16(packet, offset); 2075 offset += 2; 2076 2077 conn = hci_connection_for_handle(handle); 2078 if (!conn){ 2079 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2080 continue; 2081 } 2082 2083 if (conn->num_packets_sent >= num_packets){ 2084 conn->num_packets_sent -= num_packets; 2085 } else { 2086 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2087 conn->num_packets_sent = 0; 2088 } 2089 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2090 2091 #ifdef ENABLE_CLASSIC 2092 // For SCO, we do the can_send_now_check here 2093 hci_notify_if_sco_can_send_now(); 2094 #endif 2095 } 2096 break; 2097 } 2098 2099 #ifdef ENABLE_CLASSIC 2100 case HCI_EVENT_INQUIRY_COMPLETE: 2101 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2102 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2103 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2104 hci_emit_event(event, sizeof(event), 1); 2105 } 2106 break; 2107 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2108 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2109 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2110 } 2111 break; 2112 case HCI_EVENT_CONNECTION_REQUEST: 2113 reverse_bd_addr(&packet[2], addr); 2114 if (hci_stack->gap_classic_accept_callback != NULL){ 2115 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2116 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2117 bd_addr_copy(hci_stack->decline_addr, addr); 2118 break; 2119 } 2120 } 2121 2122 // TODO: eval COD 8-10 2123 link_type = packet[11]; 2124 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2125 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 2126 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2127 if (!conn) { 2128 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2129 } 2130 if (!conn) { 2131 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2132 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2133 bd_addr_copy(hci_stack->decline_addr, addr); 2134 break; 2135 } 2136 conn->role = HCI_ROLE_SLAVE; 2137 conn->state = RECEIVED_CONNECTION_REQUEST; 2138 // store info about eSCO 2139 if (link_type == 0x02){ 2140 conn->remote_supported_feature_eSCO = 1; 2141 } 2142 hci_run(); 2143 break; 2144 2145 case HCI_EVENT_CONNECTION_COMPLETE: 2146 // Connection management 2147 reverse_bd_addr(&packet[5], addr); 2148 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2149 addr_type = BD_ADDR_TYPE_CLASSIC; 2150 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2151 if (conn) { 2152 if (!packet[2]){ 2153 conn->state = OPEN; 2154 conn->con_handle = little_endian_read_16(packet, 3); 2155 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2156 2157 // restart timer 2158 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2159 btstack_run_loop_add_timer(&conn->timeout); 2160 2161 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2162 2163 hci_emit_nr_connections_changed(); 2164 } else { 2165 // connection failed 2166 hci_handle_connection_failed(conn, packet[2]); 2167 } 2168 } 2169 break; 2170 2171 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2172 reverse_bd_addr(&packet[5], addr); 2173 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2174 if (packet[2]){ 2175 // connection failed 2176 break; 2177 } 2178 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2179 if (!conn) { 2180 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2181 } 2182 if (!conn) { 2183 break; 2184 } 2185 conn->state = OPEN; 2186 conn->con_handle = little_endian_read_16(packet, 3); 2187 2188 #ifdef ENABLE_SCO_OVER_HCI 2189 // update SCO 2190 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2191 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2192 } 2193 // trigger can send now 2194 if (hci_have_usb_transport()){ 2195 hci_stack->sco_can_send_now = 1; 2196 } 2197 #endif 2198 break; 2199 2200 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2201 handle = little_endian_read_16(packet, 3); 2202 conn = hci_connection_for_handle(handle); 2203 if (!conn) break; 2204 if (!packet[2]){ 2205 uint8_t * features = &packet[5]; 2206 if (features[6] & (1 << 3)){ 2207 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2208 } 2209 if (features[3] & (1<<7)){ 2210 conn->remote_supported_feature_eSCO = 1; 2211 } 2212 } 2213 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2214 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2215 if (conn->bonding_flags & BONDING_DEDICATED){ 2216 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2217 } 2218 break; 2219 2220 case HCI_EVENT_LINK_KEY_REQUEST: 2221 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2222 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2223 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2224 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2225 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2226 hci_run(); 2227 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2228 return; 2229 2230 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2231 reverse_bd_addr(&packet[2], addr); 2232 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2233 if (!conn) break; 2234 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2235 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2236 // Change Connection Encryption keeps link key type 2237 if (link_key_type != CHANGED_COMBINATION_KEY){ 2238 conn->link_key_type = link_key_type; 2239 } 2240 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2241 // still forward event to allow dismiss of pairing dialog 2242 break; 2243 } 2244 2245 case HCI_EVENT_PIN_CODE_REQUEST: 2246 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2247 // non-bondable mode: pin code negative reply will be sent 2248 if (!hci_stack->bondable){ 2249 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2250 hci_run(); 2251 return; 2252 } 2253 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2254 if (!hci_stack->link_key_db) break; 2255 hci_event_pin_code_request_get_bd_addr(packet, addr); 2256 hci_stack->link_key_db->delete_link_key(addr); 2257 break; 2258 2259 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2260 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2261 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2262 break; 2263 2264 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2265 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2266 if (!hci_stack->ssp_auto_accept) break; 2267 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2268 break; 2269 2270 case HCI_EVENT_USER_PASSKEY_REQUEST: 2271 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2272 if (!hci_stack->ssp_auto_accept) break; 2273 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2274 break; 2275 case HCI_EVENT_MODE_CHANGE: 2276 handle = hci_event_mode_change_get_handle(packet); 2277 conn = hci_connection_for_handle(handle); 2278 if (!conn) break; 2279 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2280 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2281 break; 2282 #endif 2283 2284 case HCI_EVENT_ENCRYPTION_CHANGE: 2285 handle = little_endian_read_16(packet, 3); 2286 conn = hci_connection_for_handle(handle); 2287 if (!conn) break; 2288 if (packet[2] == 0) { 2289 if (packet[5]){ 2290 if (hci_is_le_connection(conn)){ 2291 // For LE, we accept connection as encrypted 2292 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2293 } 2294 #ifdef ENABLE_CLASSIC 2295 else { 2296 // For Classic, we need to validate encryption key size first 2297 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2298 } 2299 #endif 2300 } else { 2301 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2302 } 2303 } 2304 2305 break; 2306 2307 #ifdef ENABLE_CLASSIC 2308 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2309 handle = little_endian_read_16(packet, 3); 2310 conn = hci_connection_for_handle(handle); 2311 if (!conn) break; 2312 2313 // dedicated bonding: send result and disconnect 2314 if (conn->bonding_flags & BONDING_DEDICATED){ 2315 conn->bonding_flags &= ~BONDING_DEDICATED; 2316 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2317 conn->bonding_status = packet[2]; 2318 break; 2319 } 2320 2321 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2322 // link key sufficient for requested security 2323 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2324 break; 2325 } 2326 // not enough 2327 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2328 break; 2329 #endif 2330 2331 // HCI_EVENT_DISCONNECTION_COMPLETE 2332 // has been split, to first notify stack before shutting connection down 2333 // see end of function, too. 2334 case HCI_EVENT_DISCONNECTION_COMPLETE: 2335 if (packet[2]) break; // status != 0 2336 handle = little_endian_read_16(packet, 3); 2337 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2338 if (hci_stack->acl_fragmentation_total_size > 0) { 2339 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2340 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2341 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2342 hci_stack->acl_fragmentation_total_size = 0; 2343 hci_stack->acl_fragmentation_pos = 0; 2344 if (release_buffer){ 2345 hci_release_packet_buffer(); 2346 } 2347 } 2348 } 2349 2350 // re-enable advertisements for le connections if active 2351 conn = hci_connection_for_handle(handle); 2352 if (!conn) break; 2353 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2354 #ifdef ENABLE_BLE 2355 #ifdef ENABLE_LE_PERIPHERAL 2356 if (hci_is_le_connection(conn)){ 2357 hci_reenable_advertisements_if_needed(); 2358 } 2359 #endif 2360 #endif 2361 break; 2362 2363 case HCI_EVENT_HARDWARE_ERROR: 2364 log_error("Hardware Error: 0x%02x", packet[2]); 2365 if (hci_stack->hardware_error_callback){ 2366 (*hci_stack->hardware_error_callback)(packet[2]); 2367 } else { 2368 // if no special requests, just reboot stack 2369 hci_power_control_off(); 2370 hci_power_control_on(); 2371 } 2372 break; 2373 2374 #ifdef ENABLE_CLASSIC 2375 case HCI_EVENT_ROLE_CHANGE: 2376 if (packet[2]) break; // status != 0 2377 reverse_bd_addr(&packet[3], addr); 2378 addr_type = BD_ADDR_TYPE_CLASSIC; 2379 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2380 if (!conn) break; 2381 conn->role = packet[9]; 2382 break; 2383 #endif 2384 2385 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2386 // release packet buffer only for asynchronous transport and if there are not further fragements 2387 if (hci_transport_synchronous()) { 2388 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2389 return; // instead of break: to avoid re-entering hci_run() 2390 } 2391 hci_stack->acl_fragmentation_tx_active = 0; 2392 if (hci_stack->acl_fragmentation_total_size) break; 2393 hci_release_packet_buffer(); 2394 2395 // L2CAP receives this event via the hci_emit_event below 2396 2397 #ifdef ENABLE_CLASSIC 2398 // For SCO, we do the can_send_now_check here 2399 hci_notify_if_sco_can_send_now(); 2400 #endif 2401 break; 2402 2403 #ifdef ENABLE_CLASSIC 2404 case HCI_EVENT_SCO_CAN_SEND_NOW: 2405 // For SCO, we do the can_send_now_check here 2406 hci_stack->sco_can_send_now = 1; 2407 hci_notify_if_sco_can_send_now(); 2408 return; 2409 2410 // explode inquriy results for easier consumption 2411 case HCI_EVENT_INQUIRY_RESULT: 2412 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2413 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2414 gap_inquiry_explode(packet); 2415 break; 2416 #endif 2417 2418 #ifdef ENABLE_BLE 2419 case HCI_EVENT_LE_META: 2420 switch (packet[2]){ 2421 #ifdef ENABLE_LE_CENTRAL 2422 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2423 // log_info("advertising report received"); 2424 if (!hci_stack->le_scanning_enabled) break; 2425 le_handle_advertisement_report(packet, size); 2426 break; 2427 #endif 2428 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2429 // Connection management 2430 reverse_bd_addr(&packet[8], addr); 2431 addr_type = (bd_addr_type_t)packet[7]; 2432 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2433 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2434 2435 #ifdef ENABLE_LE_CENTRAL 2436 // if auto-connect, remove from whitelist in both roles 2437 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2438 hci_remove_from_whitelist(addr_type, addr); 2439 } 2440 // handle error: error is reported only to the initiator -> outgoing connection 2441 if (packet[3]){ 2442 2443 // handle cancelled outgoing connection 2444 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2445 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2446 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2447 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2448 conn = gap_get_outgoing_connection(); 2449 } 2450 2451 // outgoing connection establishment is done 2452 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2453 // remove entry 2454 if (conn){ 2455 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2456 btstack_memory_hci_connection_free( conn ); 2457 } 2458 break; 2459 } 2460 #endif 2461 // on success, both hosts receive connection complete event 2462 if (packet[6] == HCI_ROLE_MASTER){ 2463 #ifdef ENABLE_LE_CENTRAL 2464 // if we're master, it was an outgoing connection and we're done with it 2465 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2466 #endif 2467 } else { 2468 #ifdef ENABLE_LE_PERIPHERAL 2469 // if we're slave, it was an incoming connection, advertisements have stopped 2470 hci_stack->le_advertisements_active = 0; 2471 #endif 2472 } 2473 // LE connections are auto-accepted, so just create a connection if there isn't one already 2474 if (!conn){ 2475 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2476 } 2477 // no memory, sorry. 2478 if (!conn){ 2479 break; 2480 } 2481 2482 conn->state = OPEN; 2483 conn->role = packet[6]; 2484 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2485 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2486 2487 #ifdef ENABLE_LE_PERIPHERAL 2488 if (packet[6] == HCI_ROLE_SLAVE){ 2489 hci_reenable_advertisements_if_needed(); 2490 } 2491 #endif 2492 2493 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2494 2495 // restart timer 2496 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2497 // btstack_run_loop_add_timer(&conn->timeout); 2498 2499 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2500 2501 hci_emit_nr_connections_changed(); 2502 break; 2503 2504 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2505 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2506 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2507 conn = hci_connection_for_handle(handle); 2508 if (!conn) break; 2509 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2510 break; 2511 2512 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2513 // connection 2514 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2515 conn = hci_connection_for_handle(handle); 2516 if (conn) { 2517 // read arguments 2518 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2519 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2520 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2521 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2522 2523 // validate against current connection parameter range 2524 le_connection_parameter_range_t existing_range; 2525 gap_get_connection_parameter_range(&existing_range); 2526 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2527 if (update_parameter){ 2528 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2529 conn->le_conn_interval_min = le_conn_interval_min; 2530 conn->le_conn_interval_max = le_conn_interval_max; 2531 conn->le_conn_latency = le_conn_latency; 2532 conn->le_supervision_timeout = le_supervision_timeout; 2533 } else { 2534 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2535 } 2536 } 2537 break; 2538 default: 2539 break; 2540 } 2541 break; 2542 #endif 2543 case HCI_EVENT_VENDOR_SPECIFIC: 2544 // Vendor specific commands often create vendor specific event instead of num completed packets 2545 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2546 switch (hci_stack->manufacturer){ 2547 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2548 hci_stack->num_cmd_packets = 1; 2549 break; 2550 default: 2551 break; 2552 } 2553 break; 2554 default: 2555 break; 2556 } 2557 2558 // handle BT initialization 2559 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2560 hci_initializing_event_handler(packet, size); 2561 } 2562 2563 // help with BT sleep 2564 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2565 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2566 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2567 hci_initializing_next_state(); 2568 } 2569 2570 // notify upper stack 2571 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2572 2573 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2574 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2575 if (!packet[2]){ 2576 handle = little_endian_read_16(packet, 3); 2577 hci_connection_t * aConn = hci_connection_for_handle(handle); 2578 if (aConn) { 2579 uint8_t status = aConn->bonding_status; 2580 uint16_t flags = aConn->bonding_flags; 2581 bd_addr_t bd_address; 2582 memcpy(&bd_address, aConn->address, 6); 2583 hci_shutdown_connection(aConn); 2584 // connection struct is gone, don't access anymore 2585 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2586 hci_emit_dedicated_bonding_result(bd_address, status); 2587 } 2588 } 2589 } 2590 } 2591 2592 // execute main loop 2593 hci_run(); 2594 } 2595 2596 #ifdef ENABLE_CLASSIC 2597 2598 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2599 static void sco_schedule_tx(hci_connection_t * conn); 2600 2601 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2602 log_debug("SCO TX Timeout"); 2603 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2604 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2605 if (!conn) return; 2606 2607 // trigger send 2608 conn->sco_tx_ready = 1; 2609 // extra packet if CVSD but SCO buffer is too short 2610 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && hci_stack->sco_data_packet_length < 123){ 2611 conn->sco_tx_ready++; 2612 } 2613 hci_notify_if_sco_can_send_now(); 2614 } 2615 2616 2617 #define SCO_TX_AFTER_RX_MS (6) 2618 2619 static void sco_schedule_tx(hci_connection_t * conn){ 2620 2621 uint32_t now = btstack_run_loop_get_time_ms(); 2622 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2623 int time_delta_ms = sco_tx_ms - now; 2624 2625 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2626 2627 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2628 btstack_run_loop_set_timer(timer, time_delta_ms); 2629 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2630 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2631 btstack_run_loop_add_timer(timer); 2632 } 2633 2634 static void sco_handler(uint8_t * packet, uint16_t size){ 2635 // lookup connection struct 2636 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2637 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2638 if (!conn) return; 2639 2640 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2641 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2642 if (size == 83 && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2643 packet[2] = 0x3c; 2644 memmove(&packet[3], &packet[23], 63); 2645 size = 63; 2646 } 2647 } 2648 2649 if (hci_have_usb_transport()){ 2650 // Nothing to do 2651 } else { 2652 // 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); 2653 if (hci_stack->synchronous_flow_control_enabled == 0){ 2654 uint32_t now = btstack_run_loop_get_time_ms(); 2655 2656 if (!conn->sco_rx_valid){ 2657 // ignore first 10 packets 2658 conn->sco_rx_count++; 2659 // log_debug("sco rx count %u", conn->sco_rx_count); 2660 if (conn->sco_rx_count == 10) { 2661 // use first timestamp as is and pretent it just started 2662 conn->sco_rx_ms = now; 2663 conn->sco_rx_valid = 1; 2664 conn->sco_rx_count = 0; 2665 sco_schedule_tx(conn); 2666 } 2667 } else { 2668 // track expected arrival timme 2669 conn->sco_rx_count++; 2670 conn->sco_rx_ms += 7; 2671 int delta = (int32_t) (now - conn->sco_rx_ms); 2672 if (delta > 0){ 2673 conn->sco_rx_ms++; 2674 } 2675 // log_debug("sco rx %u", conn->sco_rx_ms); 2676 sco_schedule_tx(conn); 2677 } 2678 } 2679 } 2680 // deliver to app 2681 if (hci_stack->sco_packet_handler) { 2682 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2683 } 2684 2685 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2686 conn->num_packets_completed++; 2687 hci_stack->host_completed_packets = 1; 2688 hci_run(); 2689 #endif 2690 } 2691 #endif 2692 2693 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2694 hci_dump_packet(packet_type, 1, packet, size); 2695 switch (packet_type) { 2696 case HCI_EVENT_PACKET: 2697 event_handler(packet, size); 2698 break; 2699 case HCI_ACL_DATA_PACKET: 2700 acl_handler(packet, size); 2701 break; 2702 #ifdef ENABLE_CLASSIC 2703 case HCI_SCO_DATA_PACKET: 2704 sco_handler(packet, size); 2705 break; 2706 #endif 2707 default: 2708 break; 2709 } 2710 } 2711 2712 /** 2713 * @brief Add event packet handler. 2714 */ 2715 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2716 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2717 } 2718 2719 2720 /** Register HCI packet handlers */ 2721 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2722 hci_stack->acl_packet_handler = handler; 2723 } 2724 2725 #ifdef ENABLE_CLASSIC 2726 /** 2727 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2728 */ 2729 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2730 hci_stack->sco_packet_handler = handler; 2731 } 2732 #endif 2733 2734 static void hci_state_reset(void){ 2735 // no connections yet 2736 hci_stack->connections = NULL; 2737 2738 // keep discoverable/connectable as this has been requested by the client(s) 2739 // hci_stack->discoverable = 0; 2740 // hci_stack->connectable = 0; 2741 // hci_stack->bondable = 1; 2742 // hci_stack->own_addr_type = 0; 2743 2744 // buffer is free 2745 hci_stack->hci_packet_buffer_reserved = 0; 2746 2747 // no pending cmds 2748 hci_stack->decline_reason = 0; 2749 hci_stack->new_scan_enable_value = 0xff; 2750 2751 // LE 2752 #ifdef ENABLE_BLE 2753 memset(hci_stack->le_random_address, 0, 6); 2754 hci_stack->le_random_address_set = 0; 2755 #endif 2756 #ifdef ENABLE_LE_CENTRAL 2757 hci_stack->le_scanning_active = 0; 2758 hci_stack->le_scan_type = 0xff; 2759 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2760 hci_stack->le_whitelist = 0; 2761 hci_stack->le_whitelist_capacity = 0; 2762 #endif 2763 } 2764 2765 #ifdef ENABLE_CLASSIC 2766 /** 2767 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2768 */ 2769 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2770 // store and open remote device db 2771 hci_stack->link_key_db = link_key_db; 2772 if (hci_stack->link_key_db) { 2773 hci_stack->link_key_db->open(); 2774 } 2775 } 2776 #endif 2777 2778 void hci_init(const hci_transport_t *transport, const void *config){ 2779 2780 #ifdef HAVE_MALLOC 2781 if (!hci_stack) { 2782 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2783 } 2784 #else 2785 hci_stack = &hci_stack_static; 2786 #endif 2787 memset(hci_stack, 0, sizeof(hci_stack_t)); 2788 2789 // reference to use transport layer implementation 2790 hci_stack->hci_transport = transport; 2791 2792 // reference to used config 2793 hci_stack->config = config; 2794 2795 // setup pointer for outgoing packet buffer 2796 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2797 2798 // max acl payload size defined in config.h 2799 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2800 2801 // register packet handlers with transport 2802 transport->register_packet_handler(&packet_handler); 2803 2804 hci_stack->state = HCI_STATE_OFF; 2805 2806 // class of device 2807 hci_stack->class_of_device = 0x007a020c; // Smartphone 2808 2809 // bondable by default 2810 hci_stack->bondable = 1; 2811 2812 #ifdef ENABLE_CLASSIC 2813 // classic name 2814 hci_stack->local_name = default_classic_name; 2815 2816 // Master slave policy 2817 hci_stack->master_slave_policy = 1; 2818 2819 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3, we use 16 as default 2820 hci_stack->gap_required_encyrption_key_size = 16; 2821 #endif 2822 2823 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2824 hci_stack->ssp_enable = 1; 2825 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2826 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2827 hci_stack->ssp_auto_accept = 1; 2828 2829 // voice setting - signed 16 bit pcm data with CVSD over the air 2830 hci_stack->sco_voice_setting = 0x60; 2831 2832 #ifdef ENABLE_LE_CENTRAL 2833 // connection parameter to use for outgoing connections 2834 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2835 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2836 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2837 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2838 hci_stack->le_connection_latency = 4; // 4 2839 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2840 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2841 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2842 2843 // default LE Scanning 2844 hci_stack->le_scan_interval = 0x1e0; 2845 hci_stack->le_scan_window = 0x30; 2846 #endif 2847 2848 #ifdef ENABLE_LE_PERIPHERAL 2849 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2850 #endif 2851 2852 // connection parameter range used to answer connection parameter update requests in l2cap 2853 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2854 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2855 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2856 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2857 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2858 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2859 2860 hci_state_reset(); 2861 } 2862 2863 /** 2864 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2865 */ 2866 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2867 hci_stack->chipset = chipset_driver; 2868 2869 // reset chipset driver - init is also called on power_up 2870 if (hci_stack->chipset && hci_stack->chipset->init){ 2871 hci_stack->chipset->init(hci_stack->config); 2872 } 2873 } 2874 2875 /** 2876 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2877 */ 2878 void hci_set_control(const btstack_control_t *hardware_control){ 2879 // references to used control implementation 2880 hci_stack->control = hardware_control; 2881 // init with transport config 2882 hardware_control->init(hci_stack->config); 2883 } 2884 2885 void hci_close(void){ 2886 // close remote device db 2887 if (hci_stack->link_key_db) { 2888 hci_stack->link_key_db->close(); 2889 } 2890 2891 btstack_linked_list_iterator_t lit; 2892 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2893 while (btstack_linked_list_iterator_has_next(&lit)){ 2894 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2895 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2896 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2897 hci_shutdown_connection(connection); 2898 } 2899 2900 hci_power_control(HCI_POWER_OFF); 2901 2902 #ifdef HAVE_MALLOC 2903 free(hci_stack); 2904 #endif 2905 hci_stack = NULL; 2906 } 2907 2908 #ifdef ENABLE_CLASSIC 2909 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 2910 // validate ranage and set 2911 if (encryption_key_size < 7) return; 2912 if (encryption_key_size > 16) return; 2913 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 2914 } 2915 #endif 2916 2917 #ifdef ENABLE_CLASSIC 2918 void gap_set_class_of_device(uint32_t class_of_device){ 2919 hci_stack->class_of_device = class_of_device; 2920 } 2921 2922 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 2923 hci_stack->default_link_policy_settings = default_link_policy_settings; 2924 } 2925 2926 void hci_disable_l2cap_timeout_check(void){ 2927 disable_l2cap_timeouts = 1; 2928 } 2929 #endif 2930 2931 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2932 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2933 void hci_set_bd_addr(bd_addr_t addr){ 2934 memcpy(hci_stack->custom_bd_addr, addr, 6); 2935 hci_stack->custom_bd_addr_set = 1; 2936 } 2937 #endif 2938 2939 // State-Module-Driver overview 2940 // state module low-level 2941 // HCI_STATE_OFF off close 2942 // HCI_STATE_INITIALIZING, on open 2943 // HCI_STATE_WORKING, on open 2944 // HCI_STATE_HALTING, on open 2945 // HCI_STATE_SLEEPING, off/sleep close 2946 // HCI_STATE_FALLING_ASLEEP on open 2947 2948 static int hci_power_control_on(void){ 2949 2950 // power on 2951 int err = 0; 2952 if (hci_stack->control && hci_stack->control->on){ 2953 err = (*hci_stack->control->on)(); 2954 } 2955 if (err){ 2956 log_error( "POWER_ON failed"); 2957 hci_emit_hci_open_failed(); 2958 return err; 2959 } 2960 2961 // int chipset driver 2962 if (hci_stack->chipset && hci_stack->chipset->init){ 2963 hci_stack->chipset->init(hci_stack->config); 2964 } 2965 2966 // init transport 2967 if (hci_stack->hci_transport->init){ 2968 hci_stack->hci_transport->init(hci_stack->config); 2969 } 2970 2971 // open transport 2972 err = hci_stack->hci_transport->open(); 2973 if (err){ 2974 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2975 if (hci_stack->control && hci_stack->control->off){ 2976 (*hci_stack->control->off)(); 2977 } 2978 hci_emit_hci_open_failed(); 2979 return err; 2980 } 2981 return 0; 2982 } 2983 2984 static void hci_power_control_off(void){ 2985 2986 log_info("hci_power_control_off"); 2987 2988 // close low-level device 2989 hci_stack->hci_transport->close(); 2990 2991 log_info("hci_power_control_off - hci_transport closed"); 2992 2993 // power off 2994 if (hci_stack->control && hci_stack->control->off){ 2995 (*hci_stack->control->off)(); 2996 } 2997 2998 log_info("hci_power_control_off - control closed"); 2999 3000 hci_stack->state = HCI_STATE_OFF; 3001 } 3002 3003 static void hci_power_control_sleep(void){ 3004 3005 log_info("hci_power_control_sleep"); 3006 3007 #if 0 3008 // don't close serial port during sleep 3009 3010 // close low-level device 3011 hci_stack->hci_transport->close(hci_stack->config); 3012 #endif 3013 3014 // sleep mode 3015 if (hci_stack->control && hci_stack->control->sleep){ 3016 (*hci_stack->control->sleep)(); 3017 } 3018 3019 hci_stack->state = HCI_STATE_SLEEPING; 3020 } 3021 3022 static int hci_power_control_wake(void){ 3023 3024 log_info("hci_power_control_wake"); 3025 3026 // wake on 3027 if (hci_stack->control && hci_stack->control->wake){ 3028 (*hci_stack->control->wake)(); 3029 } 3030 3031 #if 0 3032 // open low-level device 3033 int err = hci_stack->hci_transport->open(hci_stack->config); 3034 if (err){ 3035 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3036 if (hci_stack->control && hci_stack->control->off){ 3037 (*hci_stack->control->off)(); 3038 } 3039 hci_emit_hci_open_failed(); 3040 return err; 3041 } 3042 #endif 3043 3044 return 0; 3045 } 3046 3047 static void hci_power_transition_to_initializing(void){ 3048 // set up state machine 3049 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3050 hci_stack->hci_packet_buffer_reserved = 0; 3051 hci_stack->state = HCI_STATE_INITIALIZING; 3052 hci_stack->substate = HCI_INIT_SEND_RESET; 3053 } 3054 3055 int hci_power_control(HCI_POWER_MODE power_mode){ 3056 3057 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3058 3059 int err = 0; 3060 switch (hci_stack->state){ 3061 3062 case HCI_STATE_OFF: 3063 switch (power_mode){ 3064 case HCI_POWER_ON: 3065 err = hci_power_control_on(); 3066 if (err) { 3067 log_error("hci_power_control_on() error %d", err); 3068 return err; 3069 } 3070 hci_power_transition_to_initializing(); 3071 break; 3072 case HCI_POWER_OFF: 3073 // do nothing 3074 break; 3075 case HCI_POWER_SLEEP: 3076 // do nothing (with SLEEP == OFF) 3077 break; 3078 } 3079 break; 3080 3081 case HCI_STATE_INITIALIZING: 3082 switch (power_mode){ 3083 case HCI_POWER_ON: 3084 // do nothing 3085 break; 3086 case HCI_POWER_OFF: 3087 // no connections yet, just turn it off 3088 hci_power_control_off(); 3089 break; 3090 case HCI_POWER_SLEEP: 3091 // no connections yet, just turn it off 3092 hci_power_control_sleep(); 3093 break; 3094 } 3095 break; 3096 3097 case HCI_STATE_WORKING: 3098 switch (power_mode){ 3099 case HCI_POWER_ON: 3100 // do nothing 3101 break; 3102 case HCI_POWER_OFF: 3103 // see hci_run 3104 hci_stack->state = HCI_STATE_HALTING; 3105 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3106 break; 3107 case HCI_POWER_SLEEP: 3108 // see hci_run 3109 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3110 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3111 break; 3112 } 3113 break; 3114 3115 case HCI_STATE_HALTING: 3116 switch (power_mode){ 3117 case HCI_POWER_ON: 3118 hci_power_transition_to_initializing(); 3119 break; 3120 case HCI_POWER_OFF: 3121 // do nothing 3122 break; 3123 case HCI_POWER_SLEEP: 3124 // see hci_run 3125 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3126 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3127 break; 3128 } 3129 break; 3130 3131 case HCI_STATE_FALLING_ASLEEP: 3132 switch (power_mode){ 3133 case HCI_POWER_ON: 3134 3135 #ifdef HAVE_PLATFORM_IPHONE_OS 3136 // nothing to do, if H4 supports power management 3137 if (btstack_control_iphone_power_management_enabled()){ 3138 hci_stack->state = HCI_STATE_INITIALIZING; 3139 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3140 break; 3141 } 3142 #endif 3143 hci_power_transition_to_initializing(); 3144 break; 3145 case HCI_POWER_OFF: 3146 // see hci_run 3147 hci_stack->state = HCI_STATE_HALTING; 3148 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3149 break; 3150 case HCI_POWER_SLEEP: 3151 // do nothing 3152 break; 3153 } 3154 break; 3155 3156 case HCI_STATE_SLEEPING: 3157 switch (power_mode){ 3158 case HCI_POWER_ON: 3159 3160 #ifdef HAVE_PLATFORM_IPHONE_OS 3161 // nothing to do, if H4 supports power management 3162 if (btstack_control_iphone_power_management_enabled()){ 3163 hci_stack->state = HCI_STATE_INITIALIZING; 3164 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3165 hci_update_scan_enable(); 3166 break; 3167 } 3168 #endif 3169 err = hci_power_control_wake(); 3170 if (err) return err; 3171 hci_power_transition_to_initializing(); 3172 break; 3173 case HCI_POWER_OFF: 3174 hci_stack->state = HCI_STATE_HALTING; 3175 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3176 break; 3177 case HCI_POWER_SLEEP: 3178 // do nothing 3179 break; 3180 } 3181 break; 3182 } 3183 3184 // create internal event 3185 hci_emit_state(); 3186 3187 // trigger next/first action 3188 hci_run(); 3189 3190 return 0; 3191 } 3192 3193 3194 #ifdef ENABLE_CLASSIC 3195 3196 static void hci_update_scan_enable(void){ 3197 // 2 = page scan, 1 = inq scan 3198 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 3199 hci_run(); 3200 } 3201 3202 void gap_discoverable_control(uint8_t enable){ 3203 if (enable) enable = 1; // normalize argument 3204 3205 if (hci_stack->discoverable == enable){ 3206 hci_emit_discoverable_enabled(hci_stack->discoverable); 3207 return; 3208 } 3209 3210 hci_stack->discoverable = enable; 3211 hci_update_scan_enable(); 3212 } 3213 3214 void gap_connectable_control(uint8_t enable){ 3215 if (enable) enable = 1; // normalize argument 3216 3217 // don't emit event 3218 if (hci_stack->connectable == enable) return; 3219 3220 hci_stack->connectable = enable; 3221 hci_update_scan_enable(); 3222 } 3223 #endif 3224 3225 void gap_local_bd_addr(bd_addr_t address_buffer){ 3226 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3227 } 3228 3229 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3230 static void hci_host_num_completed_packets(void){ 3231 3232 // create packet manually as arrays are not supported and num_commands should not get reduced 3233 hci_reserve_packet_buffer(); 3234 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3235 3236 uint16_t size = 0; 3237 uint16_t num_handles = 0; 3238 packet[size++] = 0x35; 3239 packet[size++] = 0x0c; 3240 size++; // skip param len 3241 size++; // skip num handles 3242 3243 // add { handle, packets } entries 3244 btstack_linked_item_t * it; 3245 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3246 hci_connection_t * connection = (hci_connection_t *) it; 3247 if (connection->num_packets_completed){ 3248 little_endian_store_16(packet, size, connection->con_handle); 3249 size += 2; 3250 little_endian_store_16(packet, size, connection->num_packets_completed); 3251 size += 2; 3252 // 3253 num_handles++; 3254 connection->num_packets_completed = 0; 3255 } 3256 } 3257 3258 packet[2] = size - 3; 3259 packet[3] = num_handles; 3260 3261 hci_stack->host_completed_packets = 0; 3262 3263 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3264 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3265 3266 // release packet buffer for synchronous transport implementations 3267 if (hci_transport_synchronous()){ 3268 hci_release_packet_buffer(); 3269 hci_emit_transport_packet_sent(); 3270 } 3271 } 3272 #endif 3273 3274 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3275 UNUSED(ds); 3276 hci_stack->substate = HCI_HALTING_CLOSE; 3277 // allow packet handlers to defer final shutdown 3278 hci_emit_state(); 3279 hci_run(); 3280 } 3281 3282 static void hci_run(void){ 3283 3284 // log_info("hci_run: entered"); 3285 btstack_linked_item_t * it; 3286 3287 // send continuation fragments first, as they block the prepared packet buffer 3288 if (hci_stack->acl_fragmentation_total_size > 0) { 3289 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3290 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3291 if (connection) { 3292 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3293 hci_send_acl_packet_fragments(connection); 3294 return; 3295 } 3296 } else { 3297 // connection gone -> discard further fragments 3298 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3299 hci_stack->acl_fragmentation_total_size = 0; 3300 hci_stack->acl_fragmentation_pos = 0; 3301 } 3302 } 3303 3304 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3305 // send host num completed packets next as they don't require num_cmd_packets > 0 3306 if (!hci_can_send_comand_packet_transport()) return; 3307 if (hci_stack->host_completed_packets){ 3308 hci_host_num_completed_packets(); 3309 return; 3310 } 3311 #endif 3312 3313 if (!hci_can_send_command_packet_now()) return; 3314 3315 // global/non-connection oriented commands 3316 3317 #ifdef ENABLE_CLASSIC 3318 // decline incoming connections 3319 if (hci_stack->decline_reason){ 3320 uint8_t reason = hci_stack->decline_reason; 3321 hci_stack->decline_reason = 0; 3322 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3323 return; 3324 } 3325 // send scan enable 3326 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 3327 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3328 hci_stack->new_scan_enable_value = 0xff; 3329 return; 3330 } 3331 // start/stop inquiry 3332 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 3333 uint8_t duration = hci_stack->inquiry_state; 3334 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3335 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3336 return; 3337 } 3338 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3339 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3340 hci_send_cmd(&hci_inquiry_cancel); 3341 return; 3342 } 3343 // remote name request 3344 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3345 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3346 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3347 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3348 return; 3349 } 3350 // pairing 3351 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3352 uint8_t state = hci_stack->gap_pairing_state; 3353 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3354 switch (state){ 3355 case GAP_PAIRING_STATE_SEND_PIN: 3356 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); 3357 break; 3358 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3359 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3360 break; 3361 case GAP_PAIRING_STATE_SEND_PASSKEY: 3362 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3363 break; 3364 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3365 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3366 break; 3367 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3368 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3369 break; 3370 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3371 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3372 break; 3373 default: 3374 break; 3375 } 3376 return; 3377 } 3378 #endif 3379 3380 #ifdef ENABLE_BLE 3381 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 3382 if ((hci_stack->state == HCI_STATE_WORKING) 3383 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 3384 3385 #ifdef ENABLE_LE_CENTRAL 3386 // handle le scan 3387 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3388 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3389 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3390 return; 3391 } 3392 if (hci_stack->le_scan_type != 0xff){ 3393 // defaults: active scanning, accept all advertisement packets 3394 int scan_type = hci_stack->le_scan_type; 3395 hci_stack->le_scan_type = 0xff; 3396 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); 3397 return; 3398 } 3399 #endif 3400 #ifdef ENABLE_LE_PERIPHERAL 3401 // le advertisement control 3402 if (hci_stack->le_advertisements_todo){ 3403 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3404 } 3405 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3406 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3407 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3408 return; 3409 } 3410 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3411 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3412 hci_send_cmd(&hci_le_set_advertising_parameters, 3413 hci_stack->le_advertisements_interval_min, 3414 hci_stack->le_advertisements_interval_max, 3415 hci_stack->le_advertisements_type, 3416 hci_stack->le_own_addr_type, 3417 hci_stack->le_advertisements_direct_address_type, 3418 hci_stack->le_advertisements_direct_address, 3419 hci_stack->le_advertisements_channel_map, 3420 hci_stack->le_advertisements_filter_policy); 3421 return; 3422 } 3423 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3424 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3425 uint8_t adv_data_clean[31]; 3426 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3427 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3428 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3429 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3430 return; 3431 } 3432 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3433 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3434 uint8_t scan_data_clean[31]; 3435 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3436 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3437 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3438 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3439 return; 3440 } 3441 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3442 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3443 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3444 return; 3445 } 3446 #endif 3447 3448 #ifdef ENABLE_LE_CENTRAL 3449 // 3450 // LE Whitelist Management 3451 // 3452 3453 // check if whitelist needs modification 3454 btstack_linked_list_iterator_t lit; 3455 int modification_pending = 0; 3456 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3457 while (btstack_linked_list_iterator_has_next(&lit)){ 3458 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3459 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3460 modification_pending = 1; 3461 break; 3462 } 3463 } 3464 3465 if (modification_pending){ 3466 // stop connnecting if modification pending 3467 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3468 hci_send_cmd(&hci_le_create_connection_cancel); 3469 return; 3470 } 3471 3472 // add/remove entries 3473 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3474 while (btstack_linked_list_iterator_has_next(&lit)){ 3475 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3476 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3477 entry->state = LE_WHITELIST_ON_CONTROLLER; 3478 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3479 return; 3480 3481 } 3482 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3483 bd_addr_t address; 3484 bd_addr_type_t address_type = entry->address_type; 3485 memcpy(address, entry->address, 6); 3486 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3487 btstack_memory_whitelist_entry_free(entry); 3488 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3489 return; 3490 } 3491 } 3492 } 3493 3494 // start connecting 3495 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3496 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3497 bd_addr_t null_addr; 3498 memset(null_addr, 0, 6); 3499 hci_send_cmd(&hci_le_create_connection, 3500 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3501 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3502 1, // use whitelist 3503 0, // peer address type 3504 null_addr, // peer bd addr 3505 hci_stack->le_own_addr_type, // our addr type: 3506 hci_stack->le_connection_interval_min, // conn interval min 3507 hci_stack->le_connection_interval_max, // conn interval max 3508 hci_stack->le_connection_latency, // conn latency 3509 hci_stack->le_supervision_timeout, // conn latency 3510 hci_stack->le_minimum_ce_length, // min ce length 3511 hci_stack->le_maximum_ce_length // max ce length 3512 ); 3513 return; 3514 } 3515 #endif 3516 } 3517 #endif 3518 3519 // send pending HCI commands 3520 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3521 hci_connection_t * connection = (hci_connection_t *) it; 3522 3523 switch(connection->state){ 3524 case SEND_CREATE_CONNECTION: 3525 switch(connection->address_type){ 3526 #ifdef ENABLE_CLASSIC 3527 case BD_ADDR_TYPE_CLASSIC: 3528 log_info("sending hci_create_connection"); 3529 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3530 break; 3531 #endif 3532 default: 3533 #ifdef ENABLE_BLE 3534 #ifdef ENABLE_LE_CENTRAL 3535 // track outgoing connection 3536 hci_stack->outgoing_addr_type = connection->address_type; 3537 memcpy(hci_stack->outgoing_addr, connection->address, 6); 3538 log_info("sending hci_le_create_connection"); 3539 hci_send_cmd(&hci_le_create_connection, 3540 hci_stack->le_connection_scan_interval, // conn scan interval 3541 hci_stack->le_connection_scan_window, // conn scan windows 3542 0, // don't use whitelist 3543 connection->address_type, // peer address type 3544 connection->address, // peer bd addr 3545 hci_stack->le_own_addr_type, // our addr type: 3546 hci_stack->le_connection_interval_min, // conn interval min 3547 hci_stack->le_connection_interval_max, // conn interval max 3548 hci_stack->le_connection_latency, // conn latency 3549 hci_stack->le_supervision_timeout, // conn latency 3550 hci_stack->le_minimum_ce_length, // min ce length 3551 hci_stack->le_maximum_ce_length // max ce length 3552 ); 3553 connection->state = SENT_CREATE_CONNECTION; 3554 #endif 3555 #endif 3556 break; 3557 } 3558 return; 3559 3560 #ifdef ENABLE_CLASSIC 3561 case RECEIVED_CONNECTION_REQUEST: 3562 connection->role = HCI_ROLE_SLAVE; 3563 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3564 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3565 connection->state = ACCEPTED_CONNECTION_REQUEST; 3566 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3567 } 3568 return; 3569 #endif 3570 3571 #ifdef ENABLE_BLE 3572 #ifdef ENABLE_LE_CENTRAL 3573 case SEND_CANCEL_CONNECTION: 3574 connection->state = SENT_CANCEL_CONNECTION; 3575 hci_send_cmd(&hci_le_create_connection_cancel); 3576 return; 3577 #endif 3578 #endif 3579 case SEND_DISCONNECT: 3580 connection->state = SENT_DISCONNECT; 3581 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3582 return; 3583 3584 default: 3585 break; 3586 } 3587 3588 // no further commands if connection is about to get shut down 3589 if (connection->state == SENT_DISCONNECT) continue; 3590 3591 if (connection->authentication_flags & READ_RSSI){ 3592 connectionClearAuthenticationFlags(connection, READ_RSSI); 3593 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3594 return; 3595 } 3596 3597 #ifdef ENABLE_CLASSIC 3598 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3599 log_info("responding to link key request"); 3600 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3601 link_key_t link_key; 3602 link_key_type_t link_key_type; 3603 if ( hci_stack->link_key_db 3604 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3605 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3606 connection->link_key_type = link_key_type; 3607 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3608 } else { 3609 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3610 } 3611 return; 3612 } 3613 3614 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3615 log_info("denying to pin request"); 3616 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3617 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3618 return; 3619 } 3620 3621 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3622 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3623 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3624 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3625 // tweak authentication requirements 3626 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3627 if (connection->bonding_flags & BONDING_DEDICATED){ 3628 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3629 } 3630 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3631 authreq |= 1; 3632 } 3633 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3634 } else { 3635 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3636 } 3637 return; 3638 } 3639 3640 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3641 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3642 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3643 return; 3644 } 3645 3646 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3647 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3648 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3649 return; 3650 } 3651 3652 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3653 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3654 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3655 return; 3656 } 3657 3658 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3659 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3660 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3661 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3662 return; 3663 } 3664 3665 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3666 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3667 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3668 return; 3669 } 3670 3671 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3672 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3673 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3674 return; 3675 } 3676 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3677 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3678 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3679 return; 3680 } 3681 #endif 3682 3683 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3684 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3685 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3686 return; 3687 } 3688 3689 #ifdef ENABLE_CLASSIC 3690 uint16_t sniff_min_interval; 3691 switch (connection->sniff_min_interval){ 3692 case 0: 3693 break; 3694 case 0xffff: 3695 connection->sniff_min_interval = 0; 3696 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3697 return; 3698 default: 3699 sniff_min_interval = connection->sniff_min_interval; 3700 connection->sniff_min_interval = 0; 3701 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3702 return; 3703 } 3704 #endif 3705 3706 #ifdef ENABLE_BLE 3707 switch (connection->le_con_parameter_update_state){ 3708 // response to L2CAP CON PARAMETER UPDATE REQUEST 3709 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3710 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3711 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3712 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3713 0x0000, 0xffff); 3714 return; 3715 case CON_PARAMETER_UPDATE_REPLY: 3716 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3717 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3718 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3719 0x0000, 0xffff); 3720 return; 3721 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3722 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3723 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3724 return; 3725 default: 3726 break; 3727 } 3728 if (connection->le_phy_update_all_phys != 0xff){ 3729 uint8_t all_phys = connection->le_phy_update_all_phys; 3730 connection->le_phy_update_all_phys = 0xff; 3731 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); 3732 return; 3733 } 3734 #endif 3735 } 3736 3737 hci_connection_t * connection; 3738 switch (hci_stack->state){ 3739 case HCI_STATE_INITIALIZING: 3740 hci_initializing_run(); 3741 break; 3742 3743 case HCI_STATE_HALTING: 3744 3745 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 3746 switch (hci_stack->substate){ 3747 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 3748 case HCI_HALTING_DISCONNECT_ALL_TIMER: 3749 3750 #ifdef ENABLE_BLE 3751 #ifdef ENABLE_LE_CENTRAL 3752 // free whitelist entries 3753 { 3754 btstack_linked_list_iterator_t lit; 3755 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3756 while (btstack_linked_list_iterator_has_next(&lit)){ 3757 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3758 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3759 btstack_memory_whitelist_entry_free(entry); 3760 } 3761 } 3762 #endif 3763 #endif 3764 // close all open connections 3765 connection = (hci_connection_t *) hci_stack->connections; 3766 if (connection){ 3767 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3768 if (!hci_can_send_command_packet_now()) return; 3769 3770 // check state 3771 if (connection->state == SENT_DISCONNECT) return; 3772 connection->state = SENT_DISCONNECT; 3773 3774 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3775 3776 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3777 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3778 3779 // ... which would be ignored anyway as we shutdown (free) the connection now 3780 hci_shutdown_connection(connection); 3781 3782 // finally, send the disconnect command 3783 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3784 return; 3785 } 3786 3787 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 3788 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 3789 log_info("HCI_STATE_HALTING: wait 50 ms"); 3790 hci_stack->substate = HCI_HALTING_W4_TIMER; 3791 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 3792 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3793 btstack_run_loop_add_timer(&hci_stack->timeout); 3794 break; 3795 } 3796 3797 /* explicit fall-through */ 3798 3799 case HCI_HALTING_CLOSE: 3800 log_info("HCI_STATE_HALTING, calling off"); 3801 3802 // switch mode 3803 hci_power_control_off(); 3804 3805 log_info("HCI_STATE_HALTING, emitting state"); 3806 hci_emit_state(); 3807 log_info("HCI_STATE_HALTING, done"); 3808 break; 3809 3810 case HCI_HALTING_W4_TIMER: 3811 // keep waiting 3812 3813 break; 3814 default: 3815 break; 3816 } 3817 3818 break; 3819 3820 case HCI_STATE_FALLING_ASLEEP: 3821 switch(hci_stack->substate) { 3822 case HCI_FALLING_ASLEEP_DISCONNECT: 3823 log_info("HCI_STATE_FALLING_ASLEEP"); 3824 // close all open connections 3825 connection = (hci_connection_t *) hci_stack->connections; 3826 3827 #ifdef HAVE_PLATFORM_IPHONE_OS 3828 // don't close connections, if H4 supports power management 3829 if (btstack_control_iphone_power_management_enabled()){ 3830 connection = NULL; 3831 } 3832 #endif 3833 if (connection){ 3834 3835 // send disconnect 3836 if (!hci_can_send_command_packet_now()) return; 3837 3838 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3839 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3840 3841 // send disconnected event right away - causes higher layer connections to get closed, too. 3842 hci_shutdown_connection(connection); 3843 return; 3844 } 3845 3846 if (hci_classic_supported()){ 3847 // disable page and inquiry scan 3848 if (!hci_can_send_command_packet_now()) return; 3849 3850 log_info("HCI_STATE_HALTING, disabling inq scans"); 3851 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3852 3853 // continue in next sub state 3854 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3855 break; 3856 } 3857 // no break - fall through for ble-only chips 3858 3859 case HCI_FALLING_ASLEEP_COMPLETE: 3860 log_info("HCI_STATE_HALTING, calling sleep"); 3861 #ifdef HAVE_PLATFORM_IPHONE_OS 3862 // don't actually go to sleep, if H4 supports power management 3863 if (btstack_control_iphone_power_management_enabled()){ 3864 // SLEEP MODE reached 3865 hci_stack->state = HCI_STATE_SLEEPING; 3866 hci_emit_state(); 3867 break; 3868 } 3869 #endif 3870 // switch mode 3871 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3872 hci_emit_state(); 3873 break; 3874 3875 default: 3876 break; 3877 } 3878 break; 3879 3880 default: 3881 break; 3882 } 3883 } 3884 3885 int hci_send_cmd_packet(uint8_t *packet, int size){ 3886 // house-keeping 3887 3888 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3889 hci_stack->loopback_mode = packet[3]; 3890 } 3891 3892 #ifdef ENABLE_CLASSIC 3893 bd_addr_t addr; 3894 hci_connection_t * conn; 3895 3896 // create_connection? 3897 if (IS_COMMAND(packet, hci_create_connection)){ 3898 reverse_bd_addr(&packet[3], addr); 3899 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3900 3901 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3902 if (!conn){ 3903 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3904 if (!conn){ 3905 // notify client that alloc failed 3906 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3907 return -1; // packet not sent to controller 3908 } 3909 conn->state = SEND_CREATE_CONNECTION; 3910 } 3911 log_info("conn state %u", conn->state); 3912 switch (conn->state){ 3913 // if connection active exists 3914 case OPEN: 3915 // and OPEN, emit connection complete command 3916 hci_emit_connection_complete(addr, conn->con_handle, 0); 3917 return -1; // packet not sent to controller 3918 case SEND_CREATE_CONNECTION: 3919 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 3920 break; 3921 default: 3922 // otherwise, just ignore as it is already in the open process 3923 return -1; // packet not sent to controller 3924 } 3925 conn->state = SENT_CREATE_CONNECTION; 3926 3927 // track outgoing connection 3928 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_CLASSIC; 3929 memcpy(hci_stack->outgoing_addr, addr, 6); 3930 } 3931 3932 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3933 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3934 } 3935 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3936 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3937 } 3938 3939 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3940 if (hci_stack->link_key_db){ 3941 reverse_bd_addr(&packet[3], addr); 3942 hci_stack->link_key_db->delete_link_key(addr); 3943 } 3944 } 3945 3946 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3947 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3948 reverse_bd_addr(&packet[3], addr); 3949 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3950 if (conn){ 3951 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3952 } 3953 } 3954 3955 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3956 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3957 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3958 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3959 reverse_bd_addr(&packet[3], addr); 3960 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3961 if (conn){ 3962 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3963 } 3964 } 3965 3966 #ifdef ENABLE_SCO_OVER_HCI 3967 // setup_synchronous_connection? Voice setting at offset 22 3968 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3969 // TODO: compare to current setting if sco connection already active 3970 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3971 } 3972 // accept_synchronus_connection? Voice setting at offset 18 3973 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3974 // TODO: compare to current setting if sco connection already active 3975 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3976 } 3977 #endif 3978 #endif 3979 3980 #ifdef ENABLE_BLE 3981 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3982 hci_stack->le_random_address_set = 1; 3983 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3984 } 3985 #ifdef ENABLE_LE_PERIPHERAL 3986 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3987 hci_stack->le_advertisements_active = packet[3]; 3988 } 3989 #endif 3990 #ifdef ENABLE_LE_CENTRAL 3991 if (IS_COMMAND(packet, hci_le_create_connection)){ 3992 // white list used? 3993 uint8_t initiator_filter_policy = packet[7]; 3994 switch (initiator_filter_policy){ 3995 case 0: 3996 // whitelist not used 3997 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3998 break; 3999 case 1: 4000 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4001 break; 4002 default: 4003 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4004 break; 4005 } 4006 } 4007 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 4008 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4009 } 4010 #endif 4011 #endif 4012 4013 hci_stack->num_cmd_packets--; 4014 4015 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4016 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4017 } 4018 4019 // disconnect because of security block 4020 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4021 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4022 if (!connection) return; 4023 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4024 } 4025 4026 4027 // Configure Secure Simple Pairing 4028 4029 #ifdef ENABLE_CLASSIC 4030 4031 // enable will enable SSP during init 4032 void gap_ssp_set_enable(int enable){ 4033 hci_stack->ssp_enable = enable; 4034 } 4035 4036 static int hci_local_ssp_activated(void){ 4037 return gap_ssp_supported() && hci_stack->ssp_enable; 4038 } 4039 4040 // if set, BTstack will respond to io capability request using authentication requirement 4041 void gap_ssp_set_io_capability(int io_capability){ 4042 hci_stack->ssp_io_capability = io_capability; 4043 } 4044 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4045 hci_stack->ssp_authentication_requirement = authentication_requirement; 4046 } 4047 4048 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4049 void gap_ssp_set_auto_accept(int auto_accept){ 4050 hci_stack->ssp_auto_accept = auto_accept; 4051 } 4052 #endif 4053 4054 // va_list part of hci_send_cmd 4055 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4056 if (!hci_can_send_command_packet_now()){ 4057 log_error("hci_send_cmd called but cannot send packet now"); 4058 return 0; 4059 } 4060 4061 // for HCI INITIALIZATION 4062 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4063 hci_stack->last_cmd_opcode = cmd->opcode; 4064 4065 hci_reserve_packet_buffer(); 4066 uint8_t * packet = hci_stack->hci_packet_buffer; 4067 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4068 int err = hci_send_cmd_packet(packet, size); 4069 4070 // release packet buffer for synchronous transport implementations 4071 if (hci_transport_synchronous()){ 4072 hci_release_packet_buffer(); 4073 hci_emit_transport_packet_sent(); 4074 } 4075 4076 return err; 4077 } 4078 4079 /** 4080 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4081 */ 4082 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4083 va_list argptr; 4084 va_start(argptr, cmd); 4085 int res = hci_send_cmd_va_arg(cmd, argptr); 4086 va_end(argptr); 4087 return res; 4088 } 4089 4090 // Create various non-HCI events. 4091 // TODO: generalize, use table similar to hci_create_command 4092 4093 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4094 // dump packet 4095 if (dump) { 4096 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4097 } 4098 4099 // dispatch to all event handlers 4100 btstack_linked_list_iterator_t it; 4101 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4102 while (btstack_linked_list_iterator_has_next(&it)){ 4103 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4104 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4105 } 4106 } 4107 4108 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4109 if (!hci_stack->acl_packet_handler) return; 4110 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4111 } 4112 4113 #ifdef ENABLE_CLASSIC 4114 static void hci_notify_if_sco_can_send_now(void){ 4115 // notify SCO sender if waiting 4116 if (!hci_stack->sco_waiting_for_can_send_now) return; 4117 if (hci_can_send_sco_packet_now()){ 4118 hci_stack->sco_waiting_for_can_send_now = 0; 4119 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4120 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4121 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4122 } 4123 } 4124 4125 // parsing end emitting has been merged to reduce code size 4126 static void gap_inquiry_explode(uint8_t * packet){ 4127 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4128 4129 uint8_t * eir_data; 4130 ad_context_t context; 4131 const uint8_t * name; 4132 uint8_t name_len; 4133 4134 int event_type = hci_event_packet_get_type(packet); 4135 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 4136 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4137 4138 // event[1] is set at the end 4139 int i; 4140 for (i=0; i<num_responses;i++){ 4141 memset(event, 0, sizeof(event)); 4142 event[0] = GAP_EVENT_INQUIRY_RESULT; 4143 uint8_t event_size = 18; // if name is not set by EIR 4144 4145 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 4146 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 4147 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 4148 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 4149 4150 switch (event_type){ 4151 case HCI_EVENT_INQUIRY_RESULT: 4152 // 14,15,16,17 = 0, size 18 4153 break; 4154 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4155 event[14] = 1; 4156 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 4157 // 16,17 = 0, size 18 4158 break; 4159 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4160 event[14] = 1; 4161 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 4162 // for EIR packets, there is only one reponse in it 4163 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4164 name = NULL; 4165 // EIR data is 240 bytes in EIR event 4166 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4167 uint8_t data_type = ad_iterator_get_data_type(&context); 4168 uint8_t data_size = ad_iterator_get_data_len(&context); 4169 const uint8_t * data = ad_iterator_get_data(&context); 4170 // Prefer Complete Local Name over Shortend Local Name 4171 switch (data_type){ 4172 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4173 if (name) continue; 4174 /* explicit fall-through */ 4175 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4176 name = data; 4177 name_len = data_size; 4178 break; 4179 default: 4180 break; 4181 } 4182 } 4183 if (name){ 4184 event[16] = 1; 4185 // truncate name if needed 4186 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4187 event[17] = len; 4188 memcpy(&event[18], name, len); 4189 event_size += len; 4190 } 4191 break; 4192 } 4193 event[1] = event_size - 2; 4194 hci_emit_event(event, event_size, 1); 4195 } 4196 } 4197 #endif 4198 4199 void hci_emit_state(void){ 4200 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4201 uint8_t event[3]; 4202 event[0] = BTSTACK_EVENT_STATE; 4203 event[1] = sizeof(event) - 2; 4204 event[2] = hci_stack->state; 4205 hci_emit_event(event, sizeof(event), 1); 4206 } 4207 4208 #ifdef ENABLE_CLASSIC 4209 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4210 uint8_t event[13]; 4211 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4212 event[1] = sizeof(event) - 2; 4213 event[2] = status; 4214 little_endian_store_16(event, 3, con_handle); 4215 reverse_bd_addr(address, &event[5]); 4216 event[11] = 1; // ACL connection 4217 event[12] = 0; // encryption disabled 4218 hci_emit_event(event, sizeof(event), 1); 4219 } 4220 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4221 if (disable_l2cap_timeouts) return; 4222 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4223 uint8_t event[4]; 4224 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4225 event[1] = sizeof(event) - 2; 4226 little_endian_store_16(event, 2, conn->con_handle); 4227 hci_emit_event(event, sizeof(event), 1); 4228 } 4229 #endif 4230 4231 #ifdef ENABLE_BLE 4232 #ifdef ENABLE_LE_CENTRAL 4233 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4234 uint8_t event[21]; 4235 event[0] = HCI_EVENT_LE_META; 4236 event[1] = sizeof(event) - 2; 4237 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4238 event[3] = status; 4239 little_endian_store_16(event, 4, con_handle); 4240 event[6] = 0; // TODO: role 4241 event[7] = address_type; 4242 reverse_bd_addr(address, &event[8]); 4243 little_endian_store_16(event, 14, 0); // interval 4244 little_endian_store_16(event, 16, 0); // latency 4245 little_endian_store_16(event, 18, 0); // supervision timeout 4246 event[20] = 0; // master clock accuracy 4247 hci_emit_event(event, sizeof(event), 1); 4248 } 4249 #endif 4250 #endif 4251 4252 static void hci_emit_transport_packet_sent(void){ 4253 // notify upper stack that it might be possible to send again 4254 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4255 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4256 } 4257 4258 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4259 uint8_t event[6]; 4260 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4261 event[1] = sizeof(event) - 2; 4262 event[2] = 0; // status = OK 4263 little_endian_store_16(event, 3, con_handle); 4264 event[5] = reason; 4265 hci_emit_event(event, sizeof(event), 1); 4266 } 4267 4268 static void hci_emit_nr_connections_changed(void){ 4269 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4270 uint8_t event[3]; 4271 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4272 event[1] = sizeof(event) - 2; 4273 event[2] = nr_hci_connections(); 4274 hci_emit_event(event, sizeof(event), 1); 4275 } 4276 4277 static void hci_emit_hci_open_failed(void){ 4278 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4279 uint8_t event[2]; 4280 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4281 event[1] = sizeof(event) - 2; 4282 hci_emit_event(event, sizeof(event), 1); 4283 } 4284 4285 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4286 log_info("hci_emit_dedicated_bonding_result %u ", status); 4287 uint8_t event[9]; 4288 int pos = 0; 4289 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4290 event[pos++] = sizeof(event) - 2; 4291 event[pos++] = status; 4292 reverse_bd_addr(address, &event[pos]); 4293 hci_emit_event(event, sizeof(event), 1); 4294 } 4295 4296 4297 #ifdef ENABLE_CLASSIC 4298 4299 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4300 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4301 uint8_t event[5]; 4302 int pos = 0; 4303 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4304 event[pos++] = sizeof(event) - 2; 4305 little_endian_store_16(event, 2, con_handle); 4306 pos += 2; 4307 event[pos++] = level; 4308 hci_emit_event(event, sizeof(event), 1); 4309 } 4310 4311 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4312 if (!connection) return LEVEL_0; 4313 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4314 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4315 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4316 // LEVEL 4 always requires 128 bit encrytion key size 4317 if (security_level == LEVEL_4 && connection->encryption_key_size < 16){ 4318 security_level = LEVEL_3; 4319 } 4320 return security_level; 4321 } 4322 4323 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4324 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4325 uint8_t event[3]; 4326 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4327 event[1] = sizeof(event) - 2; 4328 event[2] = enabled; 4329 hci_emit_event(event, sizeof(event), 1); 4330 } 4331 4332 // query if remote side supports eSCO 4333 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4334 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4335 if (!connection) return 0; 4336 return connection->remote_supported_feature_eSCO; 4337 } 4338 4339 // query if remote side supports SSP 4340 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4341 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4342 if (!connection) return 0; 4343 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4344 } 4345 4346 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4347 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4348 } 4349 4350 // GAP API 4351 /** 4352 * @bbrief enable/disable bonding. default is enabled 4353 * @praram enabled 4354 */ 4355 void gap_set_bondable_mode(int enable){ 4356 hci_stack->bondable = enable ? 1 : 0; 4357 } 4358 /** 4359 * @brief Get bondable mode. 4360 * @return 1 if bondable 4361 */ 4362 int gap_get_bondable_mode(void){ 4363 return hci_stack->bondable; 4364 } 4365 4366 /** 4367 * @brief map link keys to security levels 4368 */ 4369 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4370 switch (link_key_type){ 4371 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4372 return LEVEL_4; 4373 case COMBINATION_KEY: 4374 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4375 return LEVEL_3; 4376 default: 4377 return LEVEL_2; 4378 } 4379 } 4380 4381 /** 4382 * @brief map link keys to secure connection yes/no 4383 */ 4384 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4385 switch (link_key_type){ 4386 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4387 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4388 return 1; 4389 default: 4390 return 0; 4391 } 4392 } 4393 4394 /** 4395 * @brief map link keys to authenticated 4396 */ 4397 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4398 switch (link_key_type){ 4399 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4400 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4401 return 1; 4402 default: 4403 return 0; 4404 } 4405 } 4406 4407 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4408 log_info("gap_mitm_protection_required_for_security_level %u", level); 4409 return level > LEVEL_2; 4410 } 4411 4412 /** 4413 * @brief get current security level 4414 */ 4415 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4416 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4417 if (!connection) return LEVEL_0; 4418 return gap_security_level_for_connection(connection); 4419 } 4420 4421 /** 4422 * @brief request connection to device to 4423 * @result GAP_AUTHENTICATION_RESULT 4424 */ 4425 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4426 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4427 if (!connection){ 4428 hci_emit_security_level(con_handle, LEVEL_0); 4429 return; 4430 } 4431 gap_security_level_t current_level = gap_security_level(con_handle); 4432 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4433 requested_level, connection->requested_security_level, current_level); 4434 4435 // assumption: earlier requested security higher than current level => security request is active 4436 if (current_level < connection->requested_security_level){ 4437 if (connection->requested_security_level < requested_level){ 4438 // increase requested level as new level is higher 4439 4440 // TODO: handle re-authentication when done 4441 4442 connection->requested_security_level = requested_level; 4443 } 4444 return; 4445 } 4446 4447 // no request active, notify if security sufficient 4448 if (requested_level <= current_level){ 4449 hci_emit_security_level(con_handle, current_level); 4450 return; 4451 } 4452 4453 // start pairing to increase security level 4454 connection->requested_security_level = requested_level; 4455 4456 #if 0 4457 // sending encryption request without a link key results in an error. 4458 // TODO: figure out how to use it properly 4459 4460 // would enabling ecnryption suffice (>= LEVEL_2)? 4461 if (hci_stack->link_key_db){ 4462 link_key_type_t link_key_type; 4463 link_key_t link_key; 4464 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4465 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4466 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4467 return; 4468 } 4469 } 4470 } 4471 #endif 4472 4473 // start to authenticate connection 4474 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4475 hci_run(); 4476 } 4477 4478 /** 4479 * @brief start dedicated bonding with device. disconnect after bonding 4480 * @param device 4481 * @param request MITM protection 4482 * @result GAP_DEDICATED_BONDING_COMPLETE 4483 */ 4484 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4485 4486 // create connection state machine 4487 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 4488 4489 if (!connection){ 4490 return BTSTACK_MEMORY_ALLOC_FAILED; 4491 } 4492 4493 // delete linkn key 4494 gap_drop_link_key_for_bd_addr(device); 4495 4496 // configure LEVEL_2/3, dedicated bonding 4497 connection->state = SEND_CREATE_CONNECTION; 4498 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4499 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4500 connection->bonding_flags = BONDING_DEDICATED; 4501 4502 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4503 4504 // handle: connnection failure (connection complete != ok) 4505 // handle: authentication failure 4506 // handle: disconnect on done 4507 4508 hci_run(); 4509 4510 return 0; 4511 } 4512 #endif 4513 4514 void gap_set_local_name(const char * local_name){ 4515 hci_stack->local_name = local_name; 4516 } 4517 4518 4519 #ifdef ENABLE_BLE 4520 4521 #ifdef ENABLE_LE_CENTRAL 4522 void gap_start_scan(void){ 4523 hci_stack->le_scanning_enabled = 1; 4524 hci_run(); 4525 } 4526 4527 void gap_stop_scan(void){ 4528 hci_stack->le_scanning_enabled = 0; 4529 hci_run(); 4530 } 4531 4532 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4533 hci_stack->le_scan_type = scan_type; 4534 hci_stack->le_scan_interval = scan_interval; 4535 hci_stack->le_scan_window = scan_window; 4536 hci_run(); 4537 } 4538 4539 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4540 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4541 if (!conn){ 4542 log_info("gap_connect: no connection exists yet, creating context"); 4543 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4544 if (!conn){ 4545 // notify client that alloc failed 4546 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4547 log_info("gap_connect: failed to alloc hci_connection_t"); 4548 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4549 } 4550 conn->state = SEND_CREATE_CONNECTION; 4551 log_info("gap_connect: send create connection next"); 4552 hci_run(); 4553 return 0; 4554 } 4555 4556 if (!hci_is_le_connection(conn) || 4557 conn->state == SEND_CREATE_CONNECTION || 4558 conn->state == SENT_CREATE_CONNECTION) { 4559 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4560 log_error("gap_connect: classic connection or connect is already being created"); 4561 return GATT_CLIENT_IN_WRONG_STATE; 4562 } 4563 4564 log_info("gap_connect: context exists with state %u", conn->state); 4565 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4566 hci_run(); 4567 return 0; 4568 } 4569 4570 // @assumption: only a single outgoing LE Connection exists 4571 static hci_connection_t * gap_get_outgoing_connection(void){ 4572 btstack_linked_item_t *it; 4573 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4574 hci_connection_t * conn = (hci_connection_t *) it; 4575 if (!hci_is_le_connection(conn)) continue; 4576 switch (conn->state){ 4577 case SEND_CREATE_CONNECTION: 4578 case SENT_CREATE_CONNECTION: 4579 case SENT_CANCEL_CONNECTION: 4580 return conn; 4581 default: 4582 break; 4583 }; 4584 } 4585 return NULL; 4586 } 4587 4588 uint8_t gap_connect_cancel(void){ 4589 hci_connection_t * conn = gap_get_outgoing_connection(); 4590 if (!conn) return 0; 4591 switch (conn->state){ 4592 case SEND_CREATE_CONNECTION: 4593 // skip sending create connection and emit event instead 4594 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4595 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4596 btstack_memory_hci_connection_free( conn ); 4597 break; 4598 case SENT_CREATE_CONNECTION: 4599 // request to send cancel connection 4600 conn->state = SEND_CANCEL_CONNECTION; 4601 hci_run(); 4602 break; 4603 default: 4604 break; 4605 } 4606 return 0; 4607 } 4608 #endif 4609 4610 #ifdef ENABLE_LE_CENTRAL 4611 /** 4612 * @brief Set connection parameters for outgoing connections 4613 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4614 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4615 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4616 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4617 * @param conn_latency, default: 4 4618 * @param supervision_timeout (unit: 10ms), default: 720 ms 4619 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4620 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4621 */ 4622 4623 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4624 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4625 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4626 hci_stack->le_connection_scan_interval = conn_scan_interval; 4627 hci_stack->le_connection_scan_window = conn_scan_window; 4628 hci_stack->le_connection_interval_min = conn_interval_min; 4629 hci_stack->le_connection_interval_max = conn_interval_max; 4630 hci_stack->le_connection_latency = conn_latency; 4631 hci_stack->le_supervision_timeout = supervision_timeout; 4632 hci_stack->le_minimum_ce_length = min_ce_length; 4633 hci_stack->le_maximum_ce_length = max_ce_length; 4634 } 4635 #endif 4636 4637 /** 4638 * @brief Updates the connection parameters for a given LE connection 4639 * @param handle 4640 * @param conn_interval_min (unit: 1.25ms) 4641 * @param conn_interval_max (unit: 1.25ms) 4642 * @param conn_latency 4643 * @param supervision_timeout (unit: 10ms) 4644 * @returns 0 if ok 4645 */ 4646 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4647 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4648 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4649 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4650 connection->le_conn_interval_min = conn_interval_min; 4651 connection->le_conn_interval_max = conn_interval_max; 4652 connection->le_conn_latency = conn_latency; 4653 connection->le_supervision_timeout = supervision_timeout; 4654 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4655 hci_run(); 4656 return 0; 4657 } 4658 4659 /** 4660 * @brief Request an update of the connection parameter for a given LE connection 4661 * @param handle 4662 * @param conn_interval_min (unit: 1.25ms) 4663 * @param conn_interval_max (unit: 1.25ms) 4664 * @param conn_latency 4665 * @param supervision_timeout (unit: 10ms) 4666 * @returns 0 if ok 4667 */ 4668 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4669 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4670 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4671 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4672 connection->le_conn_interval_min = conn_interval_min; 4673 connection->le_conn_interval_max = conn_interval_max; 4674 connection->le_conn_latency = conn_latency; 4675 connection->le_supervision_timeout = supervision_timeout; 4676 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4677 hci_run(); 4678 return 0; 4679 } 4680 4681 #ifdef ENABLE_LE_PERIPHERAL 4682 4683 static void gap_advertisments_changed(void){ 4684 // disable advertisements before updating adv, scan data, or adv params 4685 if (hci_stack->le_advertisements_active){ 4686 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4687 } 4688 hci_run(); 4689 } 4690 4691 /** 4692 * @brief Set Advertisement Data 4693 * @param advertising_data_length 4694 * @param advertising_data (max 31 octets) 4695 * @note data is not copied, pointer has to stay valid 4696 */ 4697 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4698 hci_stack->le_advertisements_data_len = advertising_data_length; 4699 hci_stack->le_advertisements_data = advertising_data; 4700 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4701 gap_advertisments_changed(); 4702 } 4703 4704 /** 4705 * @brief Set Scan Response Data 4706 * @param advertising_data_length 4707 * @param advertising_data (max 31 octets) 4708 * @note data is not copied, pointer has to stay valid 4709 */ 4710 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4711 hci_stack->le_scan_response_data_len = scan_response_data_length; 4712 hci_stack->le_scan_response_data = scan_response_data; 4713 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4714 gap_advertisments_changed(); 4715 } 4716 4717 /** 4718 * @brief Set Advertisement Parameters 4719 * @param adv_int_min 4720 * @param adv_int_max 4721 * @param adv_type 4722 * @param direct_address_type 4723 * @param direct_address 4724 * @param channel_map 4725 * @param filter_policy 4726 * 4727 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4728 */ 4729 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4730 uint8_t direct_address_typ, bd_addr_t direct_address, 4731 uint8_t channel_map, uint8_t filter_policy) { 4732 4733 hci_stack->le_advertisements_interval_min = adv_int_min; 4734 hci_stack->le_advertisements_interval_max = adv_int_max; 4735 hci_stack->le_advertisements_type = adv_type; 4736 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4737 hci_stack->le_advertisements_channel_map = channel_map; 4738 hci_stack->le_advertisements_filter_policy = filter_policy; 4739 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4740 4741 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4742 gap_advertisments_changed(); 4743 } 4744 4745 /** 4746 * @brief Enable/Disable Advertisements 4747 * @param enabled 4748 */ 4749 void gap_advertisements_enable(int enabled){ 4750 hci_stack->le_advertisements_enabled = enabled; 4751 if (enabled && !hci_stack->le_advertisements_active){ 4752 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4753 } 4754 if (!enabled && hci_stack->le_advertisements_active){ 4755 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4756 } 4757 hci_run(); 4758 } 4759 4760 #endif 4761 4762 void hci_le_set_own_address_type(uint8_t own_address_type){ 4763 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4764 if (own_address_type == hci_stack->le_own_addr_type) return; 4765 hci_stack->le_own_addr_type = own_address_type; 4766 4767 #ifdef ENABLE_LE_PERIPHERAL 4768 // update advertisement parameters, too 4769 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4770 gap_advertisments_changed(); 4771 #endif 4772 #ifdef ENABLE_LE_CENTRAL 4773 // note: we don't update scan parameters or modify ongoing connection attempts 4774 #endif 4775 } 4776 4777 #endif 4778 4779 uint8_t gap_disconnect(hci_con_handle_t handle){ 4780 hci_connection_t * conn = hci_connection_for_handle(handle); 4781 if (!conn){ 4782 hci_emit_disconnection_complete(handle, 0); 4783 return 0; 4784 } 4785 // ignore if already disconnected 4786 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4787 return 0; 4788 } 4789 conn->state = SEND_DISCONNECT; 4790 hci_run(); 4791 return 0; 4792 } 4793 4794 int gap_read_rssi(hci_con_handle_t con_handle){ 4795 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 4796 if (hci_connection == NULL) return 0; 4797 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 4798 hci_run(); 4799 return 1; 4800 } 4801 4802 /** 4803 * @brief Get connection type 4804 * @param con_handle 4805 * @result connection_type 4806 */ 4807 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4808 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4809 if (!conn) return GAP_CONNECTION_INVALID; 4810 switch (conn->address_type){ 4811 case BD_ADDR_TYPE_LE_PUBLIC: 4812 case BD_ADDR_TYPE_LE_RANDOM: 4813 return GAP_CONNECTION_LE; 4814 case BD_ADDR_TYPE_SCO: 4815 return GAP_CONNECTION_SCO; 4816 case BD_ADDR_TYPE_CLASSIC: 4817 return GAP_CONNECTION_ACL; 4818 default: 4819 return GAP_CONNECTION_INVALID; 4820 } 4821 } 4822 4823 #ifdef ENABLE_BLE 4824 4825 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){ 4826 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4827 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4828 4829 conn->le_phy_update_all_phys = all_phys; 4830 conn->le_phy_update_tx_phys = tx_phys; 4831 conn->le_phy_update_rx_phys = rx_phys; 4832 conn->le_phy_update_phy_options = phy_options; 4833 4834 hci_run(); 4835 4836 return 0; 4837 } 4838 4839 #ifdef ENABLE_LE_CENTRAL 4840 /** 4841 * @brief Auto Connection Establishment - Start Connecting to device 4842 * @param address_typ 4843 * @param address 4844 * @returns 0 if ok 4845 */ 4846 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4847 // check capacity 4848 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4849 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4850 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4851 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4852 entry->address_type = address_type; 4853 memcpy(entry->address, address, 6); 4854 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4855 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4856 hci_run(); 4857 return 0; 4858 } 4859 4860 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4861 btstack_linked_list_iterator_t it; 4862 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4863 while (btstack_linked_list_iterator_has_next(&it)){ 4864 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4865 if (entry->address_type != address_type) continue; 4866 if (memcmp(entry->address, address, 6) != 0) continue; 4867 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4868 // remove from controller if already present 4869 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4870 continue; 4871 } 4872 // direclty remove entry from whitelist 4873 btstack_linked_list_iterator_remove(&it); 4874 btstack_memory_whitelist_entry_free(entry); 4875 } 4876 } 4877 4878 /** 4879 * @brief Auto Connection Establishment - Stop Connecting to device 4880 * @param address_typ 4881 * @param address 4882 * @returns 0 if ok 4883 */ 4884 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4885 hci_remove_from_whitelist(address_type, address); 4886 hci_run(); 4887 return 0; 4888 } 4889 4890 /** 4891 * @brief Auto Connection Establishment - Stop everything 4892 * @note Convenience function to stop all active auto connection attempts 4893 */ 4894 void gap_auto_connection_stop_all(void){ 4895 btstack_linked_list_iterator_t it; 4896 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4897 while (btstack_linked_list_iterator_has_next(&it)){ 4898 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4899 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4900 // remove from controller if already present 4901 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4902 continue; 4903 } 4904 // directly remove entry from whitelist 4905 btstack_linked_list_iterator_remove(&it); 4906 btstack_memory_whitelist_entry_free(entry); 4907 } 4908 hci_run(); 4909 } 4910 4911 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 4912 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4913 if (!conn) return 0; 4914 return conn->le_connection_interval; 4915 } 4916 #endif 4917 #endif 4918 4919 #ifdef ENABLE_CLASSIC 4920 /** 4921 * @brief Set Extended Inquiry Response data 4922 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4923 * @note has to be done before stack starts up 4924 */ 4925 void gap_set_extended_inquiry_response(const uint8_t * data){ 4926 hci_stack->eir_data = data; 4927 } 4928 4929 /** 4930 * @brief Start GAP Classic Inquiry 4931 * @param duration in 1.28s units 4932 * @return 0 if ok 4933 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4934 */ 4935 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4936 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 4937 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4938 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4939 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4940 } 4941 hci_stack->inquiry_state = duration_in_1280ms_units; 4942 hci_run(); 4943 return 0; 4944 } 4945 4946 /** 4947 * @brief Stop GAP Classic Inquiry 4948 * @returns 0 if ok 4949 */ 4950 int gap_inquiry_stop(void){ 4951 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4952 // emit inquiry complete event, before it even started 4953 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4954 hci_emit_event(event, sizeof(event), 1); 4955 return 0; 4956 } 4957 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4958 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4959 hci_run(); 4960 return 0; 4961 } 4962 4963 4964 /** 4965 * @brief Remote Name Request 4966 * @param addr 4967 * @param page_scan_repetition_mode 4968 * @param clock_offset only used when bit 15 is set 4969 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4970 */ 4971 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4972 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4973 memcpy(hci_stack->remote_name_addr, addr, 6); 4974 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4975 hci_stack->remote_name_clock_offset = clock_offset; 4976 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4977 hci_run(); 4978 return 0; 4979 } 4980 4981 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4982 hci_stack->gap_pairing_state = state; 4983 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4984 hci_run(); 4985 return 0; 4986 } 4987 4988 /** 4989 * @brief Legacy Pairing Pin Code Response 4990 * @param addr 4991 * @param pin 4992 * @return 0 if ok 4993 */ 4994 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4995 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4996 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 4997 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4998 } 4999 5000 /** 5001 * @brief Abort Legacy Pairing 5002 * @param addr 5003 * @param pin 5004 * @return 0 if ok 5005 */ 5006 int gap_pin_code_negative(bd_addr_t addr){ 5007 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5008 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5009 } 5010 5011 /** 5012 * @brief SSP Passkey Response 5013 * @param addr 5014 * @param passkey 5015 * @return 0 if ok 5016 */ 5017 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5018 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5019 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5020 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5021 } 5022 5023 /** 5024 * @brief Abort SSP Passkey Entry/Pairing 5025 * @param addr 5026 * @param pin 5027 * @return 0 if ok 5028 */ 5029 int gap_ssp_passkey_negative(bd_addr_t addr){ 5030 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5031 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5032 } 5033 5034 /** 5035 * @brief Accept SSP Numeric Comparison 5036 * @param addr 5037 * @param passkey 5038 * @return 0 if ok 5039 */ 5040 int gap_ssp_confirmation_response(bd_addr_t addr){ 5041 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5042 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5043 } 5044 5045 /** 5046 * @brief Abort SSP Numeric Comparison/Pairing 5047 * @param addr 5048 * @param pin 5049 * @return 0 if ok 5050 */ 5051 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5052 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5053 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5054 } 5055 5056 /** 5057 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5058 * @param inquiry_mode see bluetooth_defines.h 5059 */ 5060 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5061 hci_stack->inquiry_mode = mode; 5062 } 5063 5064 /** 5065 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5066 */ 5067 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5068 hci_stack->sco_voice_setting = voice_setting; 5069 } 5070 5071 /** 5072 * @brief Get SCO Voice Setting 5073 * @return current voice setting 5074 */ 5075 uint16_t hci_get_sco_voice_setting(void){ 5076 return hci_stack->sco_voice_setting; 5077 } 5078 5079 static int hci_have_usb_transport(void){ 5080 if (!hci_stack->hci_transport) return 0; 5081 const char * transport_name = hci_stack->hci_transport->name; 5082 if (!transport_name) return 0; 5083 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5084 } 5085 5086 /** @brief Get SCO packet length for current SCO Voice setting 5087 * @note Using SCO packets of the exact length is required for USB transfer 5088 * @return Length of SCO packets in bytes (not audio frames) 5089 */ 5090 int hci_get_sco_packet_length(void){ 5091 int sco_packet_length = 0; 5092 5093 #ifdef ENABLE_SCO_OVER_HCI 5094 5095 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5096 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5097 5098 if (hci_have_usb_transport()){ 5099 // see Core Spec for H2 USB Transfer. 5100 // 3 byte SCO header + 24 bytes per connection 5101 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5102 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5103 } else { 5104 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5105 sco_packet_length = 3 + 60 * multiplier; 5106 // assert that it still fits inside an SCO buffer 5107 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5108 sco_packet_length = 3 + 60; 5109 } 5110 } 5111 #endif 5112 return sco_packet_length; 5113 } 5114 5115 /** 5116 * @brief Sets the master/slave policy 5117 * @param policy (0: attempt to become master, 1: let connecting device decide) 5118 */ 5119 void hci_set_master_slave_policy(uint8_t policy){ 5120 hci_stack->master_slave_policy = policy; 5121 } 5122 5123 #endif 5124 5125 HCI_STATE hci_get_state(void){ 5126 return hci_stack->state; 5127 } 5128 5129 #ifdef ENABLE_CLASSIC 5130 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5131 hci_stack->gap_classic_accept_callback = accept_callback; 5132 } 5133 #endif 5134 5135 /** 5136 * @brief Set callback for Bluetooth Hardware Error 5137 */ 5138 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5139 hci_stack->hardware_error_callback = fn; 5140 } 5141 5142 void hci_disconnect_all(void){ 5143 btstack_linked_list_iterator_t it; 5144 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5145 while (btstack_linked_list_iterator_has_next(&it)){ 5146 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5147 if (con->state == SENT_DISCONNECT) continue; 5148 con->state = SEND_DISCONNECT; 5149 } 5150 hci_run(); 5151 } 5152 5153 uint16_t hci_get_manufacturer(void){ 5154 return hci_stack->manufacturer; 5155 } 5156 5157 #ifdef ENABLE_BLE 5158 5159 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5160 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5161 if (!hci_con) return NULL; 5162 return &hci_con->sm_connection; 5163 } 5164 5165 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5166 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5167 5168 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5169 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5170 if (hci_connection == NULL) return 0; 5171 if (hci_is_le_connection(hci_connection)){ 5172 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5173 if (sm_conn->sm_connection_encrypted) { 5174 return sm_conn->sm_actual_encryption_key_size; 5175 } 5176 } 5177 #ifdef ENABLE_CLASSIC 5178 else { 5179 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5180 return hci_connection->encryption_key_size; 5181 } 5182 } 5183 #endif 5184 return 0; 5185 } 5186 5187 int gap_authenticated(hci_con_handle_t con_handle){ 5188 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5189 if (hci_connection == NULL) return 0; 5190 5191 switch (hci_connection->address_type){ 5192 case BD_ADDR_TYPE_LE_PUBLIC: 5193 case BD_ADDR_TYPE_LE_RANDOM: 5194 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5195 return hci_connection->sm_connection.sm_connection_authenticated; 5196 #ifdef ENABLE_CLASSIC 5197 case BD_ADDR_TYPE_SCO: 5198 case BD_ADDR_TYPE_CLASSIC: 5199 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5200 #endif 5201 default: 5202 return 0; 5203 } 5204 } 5205 5206 int gap_secure_connection(hci_con_handle_t con_handle){ 5207 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5208 if (hci_connection == NULL) return 0; 5209 5210 switch (hci_connection->address_type){ 5211 case BD_ADDR_TYPE_LE_PUBLIC: 5212 case BD_ADDR_TYPE_LE_RANDOM: 5213 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5214 return hci_connection->sm_connection.sm_connection_sc; 5215 #ifdef ENABLE_CLASSIC 5216 case BD_ADDR_TYPE_SCO: 5217 case BD_ADDR_TYPE_CLASSIC: 5218 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5219 #endif 5220 default: 5221 return 0; 5222 } 5223 } 5224 5225 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5226 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5227 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5228 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5229 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5230 return sm_conn->sm_connection_authorization_state; 5231 } 5232 #endif 5233 5234 #ifdef ENABLE_CLASSIC 5235 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){ 5236 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5237 if (!conn) return GAP_CONNECTION_INVALID; 5238 conn->sniff_min_interval = sniff_min_interval; 5239 conn->sniff_max_interval = sniff_max_interval; 5240 conn->sniff_attempt = sniff_attempt; 5241 conn->sniff_timeout = sniff_timeout; 5242 hci_run(); 5243 return 0; 5244 } 5245 5246 /** 5247 * @brief Exit Sniff mode 5248 * @param con_handle 5249 @ @return 0 if ok 5250 */ 5251 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5252 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5253 if (!conn) return GAP_CONNECTION_INVALID; 5254 conn->sniff_min_interval = 0xffff; 5255 hci_run(); 5256 return 0; 5257 } 5258 #endif 5259 5260 void hci_halting_defer(void){ 5261 if (hci_stack->state != HCI_STATE_HALTING) return; 5262 switch (hci_stack->substate){ 5263 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5264 case HCI_HALTING_CLOSE: 5265 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5266 break; 5267 default: 5268 break; 5269 } 5270 } 5271