1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #endif 63 64 #include <stdarg.h> 65 #include <string.h> 66 #include <stdio.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 #define HCI_RESET_RESEND_TIMEOUT_MS 200 98 99 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 100 #ifndef GAP_INQUIRY_MAX_NAME_LEN 101 #define GAP_INQUIRY_MAX_NAME_LEN 32 102 #endif 103 104 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 105 #define GAP_INQUIRY_DURATION_MIN 0x01 106 #define GAP_INQUIRY_DURATION_MAX 0x30 107 #define GAP_INQUIRY_STATE_ACTIVE 0x80 108 #define GAP_INQUIRY_STATE_IDLE 0 109 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 110 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 111 112 // GAP Remote Name Request 113 #define GAP_REMOTE_NAME_STATE_IDLE 0 114 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 115 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 116 117 // GAP Pairing 118 #define GAP_PAIRING_STATE_IDLE 0 119 #define GAP_PAIRING_STATE_SEND_PIN 1 120 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 121 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 122 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 123 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 124 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 125 126 127 // prototypes 128 #ifdef ENABLE_CLASSIC 129 static void hci_update_scan_enable(void); 130 static void hci_emit_discoverable_enabled(uint8_t enabled); 131 static int hci_local_ssp_activated(void); 132 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 133 static void hci_notify_if_sco_can_send_now(void); 134 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 135 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 136 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 137 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 138 static void hci_connection_timestamp(hci_connection_t *connection); 139 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 140 static void gap_inquiry_explode(uint8_t * packet); 141 #endif 142 143 static int hci_power_control_on(void); 144 static void hci_power_control_off(void); 145 static void hci_state_reset(void); 146 static void hci_emit_transport_packet_sent(void); 147 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 148 static void hci_emit_nr_connections_changed(void); 149 static void hci_emit_hci_open_failed(void); 150 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 151 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 152 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 153 static void hci_run(void); 154 static int hci_is_le_connection(hci_connection_t * connection); 155 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 156 157 #ifdef ENABLE_BLE 158 #ifdef ENABLE_LE_CENTRAL 159 // called from test/ble_client/advertising_data_parser.c 160 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 161 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 162 static hci_connection_t * gap_get_outgoing_connection(void); 163 #endif 164 #endif 165 166 // the STACK is here 167 #ifndef HAVE_MALLOC 168 static hci_stack_t hci_stack_static; 169 #endif 170 static hci_stack_t * hci_stack = NULL; 171 172 #ifdef ENABLE_CLASSIC 173 // default name 174 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 175 176 // test helper 177 static uint8_t disable_l2cap_timeouts = 0; 178 #endif 179 180 /** 181 * create connection for given address 182 * 183 * @return connection OR NULL, if no memory left 184 */ 185 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 186 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 187 hci_connection_t * conn = btstack_memory_hci_connection_get(); 188 if (!conn) return NULL; 189 bd_addr_copy(conn->address, addr); 190 conn->address_type = addr_type; 191 conn->con_handle = 0xffff; 192 conn->authentication_flags = AUTH_FLAGS_NONE; 193 conn->bonding_flags = 0; 194 conn->requested_security_level = LEVEL_0; 195 #ifdef ENABLE_CLASSIC 196 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 197 btstack_run_loop_set_timer_context(&conn->timeout, conn); 198 hci_connection_timestamp(conn); 199 #endif 200 conn->acl_recombination_length = 0; 201 conn->acl_recombination_pos = 0; 202 conn->num_packets_sent = 0; 203 204 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 205 #ifdef ENABLE_BLE 206 conn->le_phy_update_all_phys = 0xff; 207 #endif 208 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 209 return conn; 210 } 211 212 213 /** 214 * get le connection parameter range 215 * 216 * @return le connection parameter range struct 217 */ 218 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 219 *range = hci_stack->le_connection_parameter_range; 220 } 221 222 /** 223 * set le connection parameter range 224 * 225 */ 226 227 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 228 hci_stack->le_connection_parameter_range = *range; 229 } 230 231 /** 232 * @brief Test if connection parameters are inside in existing rage 233 * @param conn_interval_min (unit: 1.25ms) 234 * @param conn_interval_max (unit: 1.25ms) 235 * @param conn_latency 236 * @param supervision_timeout (unit: 10ms) 237 * @returns 1 if included 238 */ 239 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){ 240 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 241 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 242 243 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 244 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 245 246 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 247 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 248 249 return 1; 250 } 251 252 /** 253 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 254 * @note: default: 1 255 * @param max_peripheral_connections 256 */ 257 #ifdef ENABLE_LE_PERIPHERAL 258 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 259 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 260 } 261 #endif 262 263 /** 264 * get hci connections iterator 265 * 266 * @return hci connections iterator 267 */ 268 269 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 270 btstack_linked_list_iterator_init(it, &hci_stack->connections); 271 } 272 273 /** 274 * get connection for a given handle 275 * 276 * @return connection OR NULL, if not found 277 */ 278 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 279 btstack_linked_list_iterator_t it; 280 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 281 while (btstack_linked_list_iterator_has_next(&it)){ 282 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 283 if ( item->con_handle == con_handle ) { 284 return item; 285 } 286 } 287 return NULL; 288 } 289 290 /** 291 * get connection for given address 292 * 293 * @return connection OR NULL, if not found 294 */ 295 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 296 btstack_linked_list_iterator_t it; 297 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 298 while (btstack_linked_list_iterator_has_next(&it)){ 299 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 300 if (connection->address_type != addr_type) continue; 301 if (memcmp(addr, connection->address, 6) != 0) continue; 302 return connection; 303 } 304 return NULL; 305 } 306 307 308 #ifdef ENABLE_CLASSIC 309 310 #ifdef ENABLE_SCO_OVER_HCI 311 static int hci_number_sco_connections(void){ 312 int connections = 0; 313 btstack_linked_list_iterator_t it; 314 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 315 while (btstack_linked_list_iterator_has_next(&it)){ 316 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 317 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 318 connections++; 319 } 320 return connections; 321 } 322 #endif 323 324 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 325 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 326 #ifdef HAVE_EMBEDDED_TICK 327 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 328 // connections might be timed out 329 hci_emit_l2cap_check_timeout(connection); 330 } 331 #else 332 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 333 // connections might be timed out 334 hci_emit_l2cap_check_timeout(connection); 335 } 336 #endif 337 } 338 339 static void hci_connection_timestamp(hci_connection_t *connection){ 340 #ifdef HAVE_EMBEDDED_TICK 341 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 342 #else 343 connection->timestamp = btstack_run_loop_get_time_ms(); 344 #endif 345 } 346 347 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 348 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 349 } 350 351 352 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 353 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 354 } 355 356 /** 357 * add authentication flags and reset timer 358 * @note: assumes classic connection 359 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 360 */ 361 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 362 bd_addr_t addr; 363 reverse_bd_addr(bd_addr, addr); 364 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 365 if (conn) { 366 connectionSetAuthenticationFlags(conn, flags); 367 hci_connection_timestamp(conn); 368 } 369 } 370 371 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 372 hci_connection_t * conn = hci_connection_for_handle(handle); 373 if (!conn) return 0; 374 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 375 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 376 return 0; 377 } 378 379 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 380 if (!hci_stack->link_key_db) return; 381 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 382 hci_stack->link_key_db->delete_link_key(addr); 383 } 384 385 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 386 if (!hci_stack->link_key_db) return; 387 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 388 hci_stack->link_key_db->put_link_key(addr, link_key, type); 389 } 390 391 void gap_delete_all_link_keys(void){ 392 bd_addr_t addr; 393 link_key_t link_key; 394 link_key_type_t type; 395 btstack_link_key_iterator_t it; 396 int ok = gap_link_key_iterator_init(&it); 397 if (!ok) { 398 log_error("could not initialize iterator"); 399 return; 400 } 401 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 402 gap_drop_link_key_for_bd_addr(addr); 403 } 404 gap_link_key_iterator_done(&it); 405 } 406 407 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 408 if (!hci_stack->link_key_db) return 0; 409 if (!hci_stack->link_key_db->iterator_init) return 0; 410 return hci_stack->link_key_db->iterator_init(it); 411 } 412 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){ 413 if (!hci_stack->link_key_db) return 0; 414 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 415 } 416 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 417 if (!hci_stack->link_key_db) return; 418 hci_stack->link_key_db->iterator_done(it); 419 } 420 #endif 421 422 static int hci_is_le_connection(hci_connection_t * connection){ 423 switch (connection->address_type){ 424 case BD_ADDR_TYPE_LE_PUBLIC: 425 case BD_ADDR_TYPE_LE_RANDOM: 426 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 427 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 428 return 1; 429 default: 430 return 0; 431 } 432 } 433 434 /** 435 * count connections 436 */ 437 static int nr_hci_connections(void){ 438 int count = 0; 439 btstack_linked_item_t *it; 440 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 441 return count; 442 } 443 444 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 445 446 unsigned int num_packets_sent_classic = 0; 447 unsigned int num_packets_sent_le = 0; 448 449 btstack_linked_item_t *it; 450 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 451 hci_connection_t * connection = (hci_connection_t *) it; 452 if (hci_is_le_connection(connection)){ 453 num_packets_sent_le += connection->num_packets_sent; 454 } 455 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 456 num_packets_sent_classic += connection->num_packets_sent; 457 } 458 } 459 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 460 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 461 int free_slots_le = 0; 462 463 if (free_slots_classic < 0){ 464 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); 465 return 0; 466 } 467 468 if (hci_stack->le_acl_packets_total_num){ 469 // if we have LE slots, they are used 470 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 471 if (free_slots_le < 0){ 472 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); 473 return 0; 474 } 475 } else { 476 // otherwise, classic slots are used for LE, too 477 free_slots_classic -= num_packets_sent_le; 478 if (free_slots_classic < 0){ 479 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); 480 return 0; 481 } 482 } 483 484 switch (address_type){ 485 case BD_ADDR_TYPE_UNKNOWN: 486 log_error("hci_number_free_acl_slots: unknown address type"); 487 return 0; 488 489 case BD_ADDR_TYPE_CLASSIC: 490 return free_slots_classic; 491 492 default: 493 if (hci_stack->le_acl_packets_total_num){ 494 return free_slots_le; 495 } 496 return free_slots_classic; 497 } 498 } 499 500 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 501 // get connection type 502 hci_connection_t * connection = hci_connection_for_handle(con_handle); 503 if (!connection){ 504 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 505 return 0; 506 } 507 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 508 } 509 510 #ifdef ENABLE_CLASSIC 511 static int hci_number_free_sco_slots(void){ 512 unsigned int num_sco_packets_sent = 0; 513 btstack_linked_item_t *it; 514 if (hci_stack->synchronous_flow_control_enabled){ 515 // explicit flow control 516 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 517 hci_connection_t * connection = (hci_connection_t *) it; 518 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 519 num_sco_packets_sent += connection->num_packets_sent; 520 } 521 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 522 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 523 return 0; 524 } 525 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 526 } else { 527 // implicit flow control -- TODO 528 int num_ready = 0; 529 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 530 hci_connection_t * connection = (hci_connection_t *) it; 531 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 532 if (connection->sco_tx_ready == 0) continue; 533 num_ready++; 534 } 535 return num_ready; 536 } 537 } 538 #endif 539 540 // only used to send HCI Host Number Completed Packets 541 static int hci_can_send_comand_packet_transport(void){ 542 if (hci_stack->hci_packet_buffer_reserved) return 0; 543 544 // check for async hci transport implementations 545 if (hci_stack->hci_transport->can_send_packet_now){ 546 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 547 return 0; 548 } 549 } 550 return 1; 551 } 552 553 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 554 int hci_can_send_command_packet_now(void){ 555 if (hci_can_send_comand_packet_transport() == 0) return 0; 556 return hci_stack->num_cmd_packets > 0; 557 } 558 559 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 560 // check for async hci transport implementations 561 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 562 return hci_stack->hci_transport->can_send_packet_now(packet_type); 563 } 564 565 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 566 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 567 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 568 } 569 570 int hci_can_send_acl_le_packet_now(void){ 571 if (hci_stack->hci_packet_buffer_reserved) return 0; 572 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 573 } 574 575 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 576 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 577 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 578 } 579 580 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 581 if (hci_stack->hci_packet_buffer_reserved) return 0; 582 return hci_can_send_prepared_acl_packet_now(con_handle); 583 } 584 585 #ifdef ENABLE_CLASSIC 586 int hci_can_send_acl_classic_packet_now(void){ 587 if (hci_stack->hci_packet_buffer_reserved) return 0; 588 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 589 } 590 591 int hci_can_send_prepared_sco_packet_now(void){ 592 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 593 return hci_number_free_sco_slots() > 0; 594 } 595 596 int hci_can_send_sco_packet_now(void){ 597 if (hci_stack->hci_packet_buffer_reserved) return 0; 598 return hci_can_send_prepared_sco_packet_now(); 599 } 600 601 void hci_request_sco_can_send_now_event(void){ 602 hci_stack->sco_waiting_for_can_send_now = 1; 603 hci_notify_if_sco_can_send_now(); 604 } 605 #endif 606 607 // used for internal checks in l2cap.c 608 int hci_is_packet_buffer_reserved(void){ 609 return hci_stack->hci_packet_buffer_reserved; 610 } 611 612 // reserves outgoing packet buffer. @returns 1 if successful 613 int hci_reserve_packet_buffer(void){ 614 if (hci_stack->hci_packet_buffer_reserved) { 615 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 616 return 0; 617 } 618 hci_stack->hci_packet_buffer_reserved = 1; 619 return 1; 620 } 621 622 void hci_release_packet_buffer(void){ 623 hci_stack->hci_packet_buffer_reserved = 0; 624 } 625 626 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 627 static int hci_transport_synchronous(void){ 628 return hci_stack->hci_transport->can_send_packet_now == NULL; 629 } 630 631 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 632 633 // 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); 634 635 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 636 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 637 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 638 max_acl_data_packet_length = hci_stack->le_data_packets_length; 639 } 640 641 // testing: reduce buffer to minimum 642 // max_acl_data_packet_length = 52; 643 644 log_debug("hci_send_acl_packet_fragments entered"); 645 646 int err; 647 // multiple packets could be send on a synchronous HCI transport 648 while (1){ 649 650 log_debug("hci_send_acl_packet_fragments loop entered"); 651 652 // get current data 653 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 654 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 655 int more_fragments = 0; 656 657 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 658 if (current_acl_data_packet_length > max_acl_data_packet_length){ 659 more_fragments = 1; 660 current_acl_data_packet_length = max_acl_data_packet_length; 661 } 662 663 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 664 if (acl_header_pos > 0){ 665 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 666 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 667 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 668 } 669 670 // update header len 671 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 672 673 // count packet 674 connection->num_packets_sent++; 675 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 676 677 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 678 if (more_fragments){ 679 // update start of next fragment to send 680 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 681 } else { 682 // done 683 hci_stack->acl_fragmentation_pos = 0; 684 hci_stack->acl_fragmentation_total_size = 0; 685 } 686 687 // send packet 688 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 689 const int size = current_acl_data_packet_length + 4; 690 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 691 hci_stack->acl_fragmentation_tx_active = 1; 692 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 693 694 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 695 696 // done yet? 697 if (!more_fragments) break; 698 699 // can send more? 700 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 701 } 702 703 log_debug("hci_send_acl_packet_fragments loop over"); 704 705 // release buffer now for synchronous transport 706 if (hci_transport_synchronous()){ 707 hci_stack->acl_fragmentation_tx_active = 0; 708 hci_release_packet_buffer(); 709 hci_emit_transport_packet_sent(); 710 } 711 712 return err; 713 } 714 715 // pre: caller has reserved the packet buffer 716 int hci_send_acl_packet_buffer(int size){ 717 718 // log_info("hci_send_acl_packet_buffer size %u", size); 719 720 if (!hci_stack->hci_packet_buffer_reserved) { 721 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 722 return 0; 723 } 724 725 uint8_t * packet = hci_stack->hci_packet_buffer; 726 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 727 728 // check for free places on Bluetooth module 729 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 730 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 731 hci_release_packet_buffer(); 732 hci_emit_transport_packet_sent(); 733 return BTSTACK_ACL_BUFFERS_FULL; 734 } 735 736 hci_connection_t *connection = hci_connection_for_handle( con_handle); 737 if (!connection) { 738 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 739 hci_release_packet_buffer(); 740 hci_emit_transport_packet_sent(); 741 return 0; 742 } 743 744 #ifdef ENABLE_CLASSIC 745 hci_connection_timestamp(connection); 746 #endif 747 748 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 749 750 // setup data 751 hci_stack->acl_fragmentation_total_size = size; 752 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 753 754 return hci_send_acl_packet_fragments(connection); 755 } 756 757 #ifdef ENABLE_CLASSIC 758 // pre: caller has reserved the packet buffer 759 int hci_send_sco_packet_buffer(int size){ 760 761 // log_info("hci_send_acl_packet_buffer size %u", size); 762 763 if (!hci_stack->hci_packet_buffer_reserved) { 764 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 765 return 0; 766 } 767 768 uint8_t * packet = hci_stack->hci_packet_buffer; 769 770 // skip checks in loopback mode 771 if (!hci_stack->loopback_mode){ 772 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 773 774 // check for free places on Bluetooth module 775 if (!hci_can_send_prepared_sco_packet_now()) { 776 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 777 hci_release_packet_buffer(); 778 hci_emit_transport_packet_sent(); 779 return BTSTACK_ACL_BUFFERS_FULL; 780 } 781 782 // track send packet in connection struct 783 hci_connection_t *connection = hci_connection_for_handle( con_handle); 784 if (!connection) { 785 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 786 hci_release_packet_buffer(); 787 hci_emit_transport_packet_sent(); 788 return 0; 789 } 790 if (hci_stack->synchronous_flow_control_enabled){ 791 connection->num_packets_sent++; 792 } else { 793 connection->sco_tx_ready = 0; 794 } 795 } 796 797 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 798 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 799 800 if (hci_transport_synchronous()){ 801 hci_release_packet_buffer(); 802 hci_emit_transport_packet_sent(); 803 } 804 805 return err; 806 } 807 #endif 808 809 static void acl_handler(uint8_t *packet, int size){ 810 811 // log_info("acl_handler: size %u", size); 812 813 // get info 814 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 815 hci_connection_t *conn = hci_connection_for_handle(con_handle); 816 uint8_t acl_flags = READ_ACL_FLAGS(packet); 817 uint16_t acl_length = READ_ACL_LENGTH(packet); 818 819 // ignore non-registered handle 820 if (!conn){ 821 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 822 return; 823 } 824 825 // assert packet is complete 826 if (acl_length + 4 != size){ 827 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 828 return; 829 } 830 831 #ifdef ENABLE_CLASSIC 832 // update idle timestamp 833 hci_connection_timestamp(conn); 834 #endif 835 836 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 837 hci_stack->host_completed_packets = 1; 838 conn->num_packets_completed++; 839 #endif 840 841 // handle different packet types 842 switch (acl_flags & 0x03) { 843 844 case 0x01: // continuation fragment 845 846 // sanity checks 847 if (conn->acl_recombination_pos == 0) { 848 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 849 return; 850 } 851 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 852 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 853 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 854 conn->acl_recombination_pos = 0; 855 return; 856 } 857 858 // append fragment payload (header already stored) 859 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 860 conn->acl_recombination_pos += acl_length; 861 862 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 863 // conn->acl_recombination_pos, conn->acl_recombination_length); 864 865 // forward complete L2CAP packet if complete. 866 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 867 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 868 // reset recombination buffer 869 conn->acl_recombination_length = 0; 870 conn->acl_recombination_pos = 0; 871 } 872 break; 873 874 case 0x02: { // first fragment 875 876 // sanity check 877 if (conn->acl_recombination_pos) { 878 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 879 conn->acl_recombination_pos = 0; 880 } 881 882 // peek into L2CAP packet! 883 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 884 885 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 886 887 // compare fragment size to L2CAP packet size 888 if (acl_length >= l2cap_length + 4){ 889 // forward fragment as L2CAP packet 890 hci_emit_acl_packet(packet, acl_length + 4); 891 } else { 892 893 if (acl_length > HCI_ACL_BUFFER_SIZE){ 894 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 895 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 896 return; 897 } 898 899 // store first fragment and tweak acl length for complete package 900 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 901 conn->acl_recombination_pos = acl_length + 4; 902 conn->acl_recombination_length = l2cap_length; 903 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 904 } 905 break; 906 907 } 908 default: 909 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 910 return; 911 } 912 913 // execute main loop 914 hci_run(); 915 } 916 917 static void hci_shutdown_connection(hci_connection_t *conn){ 918 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 919 920 #ifdef ENABLE_CLASSIC 921 #ifdef ENABLE_SCO_OVER_HCI 922 int addr_type = conn->address_type; 923 #endif 924 #endif 925 926 btstack_run_loop_remove_timer(&conn->timeout); 927 928 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 929 btstack_memory_hci_connection_free( conn ); 930 931 // now it's gone 932 hci_emit_nr_connections_changed(); 933 934 #ifdef ENABLE_CLASSIC 935 #ifdef ENABLE_SCO_OVER_HCI 936 // update SCO 937 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 938 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 939 } 940 #endif 941 #endif 942 } 943 944 #ifdef ENABLE_CLASSIC 945 946 static const uint16_t packet_type_sizes[] = { 947 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 948 HCI_ACL_DH1_SIZE, 0, 0, 0, 949 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 950 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 951 }; 952 static const uint8_t packet_type_feature_requirement_bit[] = { 953 0, // 3 slot packets 954 1, // 5 slot packets 955 25, // EDR 2 mpbs 956 26, // EDR 3 mbps 957 39, // 3 slot EDR packts 958 40, // 5 slot EDR packet 959 }; 960 static const uint16_t packet_type_feature_packet_mask[] = { 961 0x0f00, // 3 slot packets 962 0xf000, // 5 slot packets 963 0x1102, // EDR 2 mpbs 964 0x2204, // EDR 3 mbps 965 0x0300, // 3 slot EDR packts 966 0x3000, // 5 slot EDR packet 967 }; 968 969 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 970 // enable packet types based on size 971 uint16_t packet_types = 0; 972 unsigned int i; 973 for (i=0;i<16;i++){ 974 if (packet_type_sizes[i] == 0) continue; 975 if (packet_type_sizes[i] <= buffer_size){ 976 packet_types |= 1 << i; 977 } 978 } 979 // disable packet types due to missing local supported features 980 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 981 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 982 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 983 if (feature_set) continue; 984 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 985 packet_types &= ~packet_type_feature_packet_mask[i]; 986 } 987 // flip bits for "may not be used" 988 packet_types ^= 0x3306; 989 return packet_types; 990 } 991 992 uint16_t hci_usable_acl_packet_types(void){ 993 return hci_stack->packet_types; 994 } 995 #endif 996 997 uint8_t* hci_get_outgoing_packet_buffer(void){ 998 // hci packet buffer is >= acl data packet length 999 return hci_stack->hci_packet_buffer; 1000 } 1001 1002 uint16_t hci_max_acl_data_packet_length(void){ 1003 return hci_stack->acl_data_packet_length; 1004 } 1005 1006 #ifdef ENABLE_CLASSIC 1007 int hci_extended_sco_link_supported(void){ 1008 // No. 31, byte 3, bit 7 1009 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1010 } 1011 #endif 1012 1013 int hci_non_flushable_packet_boundary_flag_supported(void){ 1014 // No. 54, byte 6, bit 6 1015 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 1016 } 1017 1018 static int gap_ssp_supported(void){ 1019 // No. 51, byte 6, bit 3 1020 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 1021 } 1022 1023 static int hci_classic_supported(void){ 1024 #ifdef ENABLE_CLASSIC 1025 // No. 37, byte 4, bit 5, = No BR/EDR Support 1026 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1027 #else 1028 return 0; 1029 #endif 1030 } 1031 1032 static int hci_le_supported(void){ 1033 #ifdef ENABLE_BLE 1034 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1035 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 1036 #else 1037 return 0; 1038 #endif 1039 } 1040 1041 #ifdef ENABLE_BLE 1042 1043 /** 1044 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1045 */ 1046 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1047 *addr_type = hci_stack->le_own_addr_type; 1048 if (hci_stack->le_own_addr_type){ 1049 memcpy(addr, hci_stack->le_random_address, 6); 1050 } else { 1051 memcpy(addr, hci_stack->local_bd_addr, 6); 1052 } 1053 } 1054 1055 #ifdef ENABLE_LE_CENTRAL 1056 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1057 1058 int offset = 3; 1059 int num_reports = packet[offset]; 1060 offset += 1; 1061 1062 int i; 1063 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1064 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1065 for (i=0; i<num_reports && offset < size;i++){ 1066 // sanity checks on data_length: 1067 uint8_t data_length = packet[offset + 8]; 1068 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1069 if (offset + 9 + data_length + 1 > size) return; 1070 // setup event 1071 uint8_t event_size = 10 + data_length; 1072 int pos = 0; 1073 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1074 event[pos++] = event_size; 1075 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 1076 offset += 8; 1077 pos += 8; 1078 event[pos++] = packet[offset + 1 + data_length]; // rssi 1079 event[pos++] = data_length; 1080 offset++; 1081 memcpy(&event[pos], &packet[offset], data_length); 1082 pos += data_length; 1083 offset += data_length + 1; // rssi 1084 hci_emit_event(event, pos, 1); 1085 } 1086 } 1087 #endif 1088 #endif 1089 1090 #ifdef ENABLE_BLE 1091 #ifdef ENABLE_LE_PERIPHERAL 1092 static void hci_reenable_advertisements_if_needed(void){ 1093 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1094 // get number of active le slave connections 1095 int num_slave_connections = 0; 1096 btstack_linked_list_iterator_t it; 1097 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1098 while (btstack_linked_list_iterator_has_next(&it)){ 1099 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1100 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1101 if (con->state != OPEN) continue; 1102 if (con->role != HCI_ROLE_SLAVE) continue; 1103 if (!hci_is_le_connection(con)) continue; 1104 num_slave_connections++; 1105 } 1106 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1107 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1108 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1109 } 1110 } 1111 } 1112 #endif 1113 #endif 1114 1115 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1116 1117 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1118 if (!hci_stack->config) return 0; 1119 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1120 // Limit baud rate for Broadcom chipsets to 3 mbps 1121 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 1122 baud_rate = 3000000; 1123 } 1124 return baud_rate; 1125 } 1126 1127 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1128 UNUSED(ds); 1129 1130 switch (hci_stack->substate){ 1131 case HCI_INIT_W4_SEND_RESET: 1132 log_info("Resend HCI Reset"); 1133 hci_stack->substate = HCI_INIT_SEND_RESET; 1134 hci_stack->num_cmd_packets = 1; 1135 hci_run(); 1136 break; 1137 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1138 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1139 if (hci_stack->hci_transport->reset_link){ 1140 hci_stack->hci_transport->reset_link(); 1141 } 1142 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 1143 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1144 log_info("Resend HCI Reset - CSR Warm Boot"); 1145 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1146 hci_stack->num_cmd_packets = 1; 1147 hci_run(); 1148 break; 1149 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1150 if (hci_stack->hci_transport->set_baudrate){ 1151 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1152 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 1153 hci_stack->hci_transport->set_baudrate(baud_rate); 1154 } 1155 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1156 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1157 if (hci_stack->hci_transport->reset_link){ 1158 log_info("Link Reset"); 1159 hci_stack->hci_transport->reset_link(); 1160 } 1161 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1162 hci_run(); 1163 } 1164 break; 1165 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1166 // otherwise continue 1167 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1168 hci_send_cmd(&hci_read_local_supported_commands); 1169 break; 1170 default: 1171 break; 1172 } 1173 } 1174 #endif 1175 1176 static void hci_initializing_next_state(void){ 1177 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1178 } 1179 1180 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_PERIPHERAL) 1181 static void hci_replace_bd_addr_placeholder(uint8_t * data, uint16_t size){ 1182 const int bd_addr_string_len = 17; 1183 int i = 0; 1184 while (i < size - bd_addr_string_len){ 1185 if (memcmp(&data[i], "00:00:00:00:00:00", bd_addr_string_len)) { 1186 i++; 1187 continue; 1188 } 1189 // set real address 1190 memcpy(&data[i], bd_addr_to_str(hci_stack->local_bd_addr), bd_addr_string_len); 1191 i += bd_addr_string_len; 1192 } 1193 } 1194 #endif 1195 1196 // assumption: hci_can_send_command_packet_now() == true 1197 static void hci_initializing_run(void){ 1198 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1199 switch (hci_stack->substate){ 1200 case HCI_INIT_SEND_RESET: 1201 hci_state_reset(); 1202 1203 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1204 // prepare reset if command complete not received in 100ms 1205 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1206 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1207 btstack_run_loop_add_timer(&hci_stack->timeout); 1208 #endif 1209 // send command 1210 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1211 hci_send_cmd(&hci_reset); 1212 break; 1213 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1214 hci_send_cmd(&hci_read_local_version_information); 1215 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1216 break; 1217 case HCI_INIT_SEND_READ_LOCAL_NAME: 1218 hci_send_cmd(&hci_read_local_name); 1219 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1220 break; 1221 1222 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1223 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1224 hci_state_reset(); 1225 // prepare reset if command complete not received in 100ms 1226 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1227 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1228 btstack_run_loop_add_timer(&hci_stack->timeout); 1229 // send command 1230 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1231 hci_send_cmd(&hci_reset); 1232 break; 1233 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1234 hci_state_reset(); 1235 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1236 hci_send_cmd(&hci_reset); 1237 break; 1238 case HCI_INIT_SEND_BAUD_CHANGE: { 1239 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1240 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1241 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1242 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1243 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1244 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1245 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1246 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1247 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1248 btstack_run_loop_add_timer(&hci_stack->timeout); 1249 } 1250 break; 1251 } 1252 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1253 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1254 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1255 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1256 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1257 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1258 break; 1259 } 1260 case HCI_INIT_CUSTOM_INIT: 1261 // Custom initialization 1262 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1263 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1264 if (valid_cmd){ 1265 int size = 3 + hci_stack->hci_packet_buffer[2]; 1266 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1267 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1268 switch (valid_cmd) { 1269 case BTSTACK_CHIPSET_VALID_COMMAND: 1270 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1271 break; 1272 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1273 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1274 log_info("CSR Warm Boot"); 1275 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1276 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1277 btstack_run_loop_add_timer(&hci_stack->timeout); 1278 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1279 && hci_stack->config 1280 && hci_stack->chipset 1281 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1282 && hci_stack->hci_transport->set_baudrate 1283 && hci_transport_uart_get_main_baud_rate()){ 1284 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1285 } else { 1286 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1287 } 1288 break; 1289 default: 1290 // should not get here 1291 break; 1292 } 1293 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1294 break; 1295 } 1296 log_info("Init script done"); 1297 1298 // Init script download on Broadcom chipsets causes: 1299 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION 1300 || hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA){ 1301 1302 // - baud rate to reset, restore UART baud rate if needed 1303 int need_baud_change = hci_stack->config 1304 && hci_stack->chipset 1305 && hci_stack->chipset->set_baudrate_command 1306 && hci_stack->hci_transport->set_baudrate 1307 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1308 if (need_baud_change) { 1309 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1310 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1311 hci_stack->hci_transport->set_baudrate(baud_rate); 1312 } 1313 1314 // - RTS will raise during update, but manual RTS/CTS in WICED port on RedBear Duo cannot handle this 1315 // -> Work around: wait a few milliseconds here. 1316 log_info("BCM delay after init script"); 1317 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1318 btstack_run_loop_set_timer(&hci_stack->timeout, 10); 1319 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1320 btstack_run_loop_add_timer(&hci_stack->timeout); 1321 break; 1322 } 1323 } 1324 // otherwise continue 1325 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1326 hci_send_cmd(&hci_read_local_supported_commands); 1327 break; 1328 case HCI_INIT_SET_BD_ADDR: 1329 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1330 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1331 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1332 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1333 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1334 break; 1335 #endif 1336 1337 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1338 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1339 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1340 hci_send_cmd(&hci_read_local_supported_commands); 1341 break; 1342 case HCI_INIT_READ_BD_ADDR: 1343 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1344 hci_send_cmd(&hci_read_bd_addr); 1345 break; 1346 case HCI_INIT_READ_BUFFER_SIZE: 1347 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1348 hci_send_cmd(&hci_read_buffer_size); 1349 break; 1350 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1351 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1352 hci_send_cmd(&hci_read_local_supported_features); 1353 break; 1354 1355 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1356 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1357 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1358 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1359 break; 1360 case HCI_INIT_HOST_BUFFER_SIZE: 1361 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1362 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1363 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1364 break; 1365 #endif 1366 1367 case HCI_INIT_SET_EVENT_MASK: 1368 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1369 if (hci_le_supported()){ 1370 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1371 } else { 1372 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1373 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1374 } 1375 break; 1376 1377 #ifdef ENABLE_CLASSIC 1378 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1379 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1380 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1381 break; 1382 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1383 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1384 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1385 break; 1386 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1387 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1388 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1389 break; 1390 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1391 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1392 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1393 break; 1394 case HCI_INIT_WRITE_LOCAL_NAME: { 1395 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1396 hci_reserve_packet_buffer(); 1397 uint8_t * packet = hci_stack->hci_packet_buffer; 1398 // construct HCI Command and send 1399 uint16_t opcode = hci_write_local_name.opcode; 1400 hci_stack->last_cmd_opcode = opcode; 1401 packet[0] = opcode & 0xff; 1402 packet[1] = opcode >> 8; 1403 packet[2] = DEVICE_NAME_LEN; 1404 memset(&packet[3], 0, DEVICE_NAME_LEN); 1405 memcpy(&packet[3], hci_stack->local_name, strlen(hci_stack->local_name)); 1406 // expand '00:00:00:00:00:00' in name with bd_addr 1407 hci_replace_bd_addr_placeholder(&packet[3], DEVICE_NAME_LEN); 1408 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1409 break; 1410 } 1411 case HCI_INIT_WRITE_EIR_DATA: { 1412 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1413 hci_reserve_packet_buffer(); 1414 uint8_t * packet = hci_stack->hci_packet_buffer; 1415 // construct HCI Command and send 1416 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1417 hci_stack->last_cmd_opcode = opcode; 1418 packet[0] = opcode & 0xff; 1419 packet[1] = opcode >> 8; 1420 packet[2] = 1 + 240; 1421 packet[3] = 0; // FEC not required 1422 if (hci_stack->eir_data){ 1423 memcpy(&packet[4], hci_stack->eir_data, 240); 1424 } else { 1425 memset(&packet[4], 0, 240); 1426 int name_len = strlen(hci_stack->local_name); 1427 packet[4] = name_len + 1; 1428 packet[5] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1429 memcpy(&packet[6], hci_stack->local_name, name_len); 1430 } 1431 // expand '00:00:00:00:00:00' in name with bd_addr 1432 hci_replace_bd_addr_placeholder(&packet[4], 240); 1433 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + 240); 1434 break; 1435 } 1436 case HCI_INIT_WRITE_INQUIRY_MODE: 1437 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1438 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1439 break; 1440 case HCI_INIT_WRITE_SCAN_ENABLE: 1441 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1442 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1443 break; 1444 // only sent if ENABLE_SCO_OVER_HCI is defined 1445 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1446 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1447 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1448 break; 1449 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1450 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1451 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1452 break; 1453 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1454 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1455 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1456 log_info("BCM: Route SCO data via HCI transport"); 1457 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1458 break; 1459 1460 #endif 1461 #ifdef ENABLE_BLE 1462 // LE INIT 1463 case HCI_INIT_LE_READ_BUFFER_SIZE: 1464 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1465 hci_send_cmd(&hci_le_read_buffer_size); 1466 break; 1467 case HCI_INIT_LE_SET_EVENT_MASK: 1468 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1469 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1470 break; 1471 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1472 // LE Supported Host = 1, Simultaneous Host = 0 1473 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1474 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1475 break; 1476 #endif 1477 1478 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1479 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1480 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1481 hci_send_cmd(&hci_le_read_maximum_data_length); 1482 break; 1483 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1484 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1485 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1486 break; 1487 #endif 1488 1489 #ifdef ENABLE_LE_CENTRAL 1490 case HCI_INIT_READ_WHITE_LIST_SIZE: 1491 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1492 hci_send_cmd(&hci_le_read_white_list_size); 1493 break; 1494 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1495 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1496 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1497 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, hci_stack->le_own_addr_type, 0); 1498 break; 1499 #endif 1500 default: 1501 return; 1502 } 1503 } 1504 1505 static void hci_init_done(void){ 1506 // done. tell the app 1507 log_info("hci_init_done -> HCI_STATE_WORKING"); 1508 hci_stack->state = HCI_STATE_WORKING; 1509 hci_emit_state(); 1510 hci_run(); 1511 } 1512 1513 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1514 1515 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1516 1517 uint8_t command_completed = 0; 1518 1519 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1520 uint16_t opcode = little_endian_read_16(packet,3); 1521 if (opcode == hci_stack->last_cmd_opcode){ 1522 command_completed = 1; 1523 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1524 } else { 1525 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1526 } 1527 } 1528 1529 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1530 uint8_t status = packet[2]; 1531 uint16_t opcode = little_endian_read_16(packet,4); 1532 if (opcode == hci_stack->last_cmd_opcode){ 1533 if (status){ 1534 command_completed = 1; 1535 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1536 } else { 1537 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1538 } 1539 } else { 1540 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1541 } 1542 } 1543 1544 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1545 1546 // Vendor == CSR 1547 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1548 // TODO: track actual command 1549 command_completed = 1; 1550 } 1551 1552 // Vendor == Toshiba 1553 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1554 // TODO: track actual command 1555 command_completed = 1; 1556 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1557 hci_stack->num_cmd_packets = 1; 1558 } 1559 1560 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1561 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1562 // 1563 // HCI Reset 1564 // Timeout 100 ms 1565 // HCI Reset 1566 // Command Complete Reset 1567 // HCI Read Local Version Information 1568 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1569 // hang... 1570 // 1571 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1572 if (!command_completed 1573 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1574 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1575 1576 uint16_t opcode = little_endian_read_16(packet,3); 1577 if (opcode == hci_reset.opcode){ 1578 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1579 return; 1580 } 1581 } 1582 1583 // CSR & H5 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_READ_LOCAL_SUPPORTED_COMMANDS){ 1588 1589 uint16_t opcode = little_endian_read_16(packet,3); 1590 if (opcode == hci_reset.opcode){ 1591 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1592 return; 1593 } 1594 } 1595 1596 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1597 // fix: Correct substate and behave as command below 1598 if (command_completed){ 1599 switch (hci_stack->substate){ 1600 case HCI_INIT_SEND_RESET: 1601 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1602 break; 1603 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1604 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1605 break; 1606 default: 1607 break; 1608 } 1609 } 1610 1611 #endif 1612 1613 if (!command_completed) return; 1614 1615 int need_baud_change = 0; 1616 int need_addr_change = 0; 1617 1618 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1619 need_baud_change = hci_stack->config 1620 && hci_stack->chipset 1621 && hci_stack->chipset->set_baudrate_command 1622 && hci_stack->hci_transport->set_baudrate 1623 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1624 1625 need_addr_change = hci_stack->custom_bd_addr_set 1626 && hci_stack->chipset 1627 && hci_stack->chipset->set_bd_addr_command; 1628 #endif 1629 1630 switch(hci_stack->substate){ 1631 1632 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1633 case HCI_INIT_SEND_RESET: 1634 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1635 // fix: just correct substate and behave as command below 1636 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1637 btstack_run_loop_remove_timer(&hci_stack->timeout); 1638 break; 1639 case HCI_INIT_W4_SEND_RESET: 1640 btstack_run_loop_remove_timer(&hci_stack->timeout); 1641 break; 1642 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1643 log_info("Received local name, need baud change %d", need_baud_change); 1644 if (need_baud_change){ 1645 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1646 return; 1647 } 1648 // skip baud change 1649 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1650 return; 1651 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1652 // for STLC2500D, baud rate change already happened. 1653 // for others, baud rate gets changed now 1654 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1655 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1656 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1657 hci_stack->hci_transport->set_baudrate(baud_rate); 1658 } 1659 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1660 return; 1661 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1662 btstack_run_loop_remove_timer(&hci_stack->timeout); 1663 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1664 return; 1665 case HCI_INIT_W4_CUSTOM_INIT: 1666 // repeat custom init 1667 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1668 return; 1669 #else 1670 case HCI_INIT_W4_SEND_RESET: 1671 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1672 return ; 1673 #endif 1674 1675 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1676 if (need_baud_change && 1677 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1678 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1679 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1680 return; 1681 } 1682 if (need_addr_change){ 1683 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1684 return; 1685 } 1686 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1687 return; 1688 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1689 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1690 if (need_baud_change){ 1691 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1692 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1693 hci_stack->hci_transport->set_baudrate(baud_rate); 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 case HCI_INIT_W4_SET_BD_ADDR: 1702 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1703 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1704 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1705 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1706 return; 1707 } 1708 // skipping st warm boot 1709 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1710 return; 1711 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1712 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1713 return; 1714 #endif 1715 case HCI_INIT_W4_READ_BD_ADDR: 1716 // only read buffer size if supported 1717 if (hci_stack->local_supported_commands[0] & 0x01) { 1718 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1719 return; 1720 } 1721 // skipping read buffer size 1722 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1723 return; 1724 case HCI_INIT_W4_SET_EVENT_MASK: 1725 // skip Classic init commands for LE only chipsets 1726 if (!hci_classic_supported()){ 1727 #ifdef ENABLE_BLE 1728 if (hci_le_supported()){ 1729 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1730 return; 1731 } 1732 #endif 1733 log_error("Neither BR/EDR nor LE supported"); 1734 hci_init_done(); 1735 return; 1736 } 1737 if (!gap_ssp_supported()){ 1738 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1739 return; 1740 } 1741 break; 1742 #ifdef ENABLE_BLE 1743 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1744 // skip write le host if not supported (e.g. on LE only EM9301) 1745 if (hci_stack->local_supported_commands[0] & 0x02) break; 1746 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1747 return; 1748 1749 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1750 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1751 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1752 if ((hci_stack->local_supported_commands[0] & 0x30) == 0x30){ 1753 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1754 return; 1755 } 1756 // explicit fall through to reduce repetitions 1757 1758 #ifdef ENABLE_LE_CENTRAL 1759 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1760 #else 1761 hci_init_done(); 1762 #endif 1763 return; 1764 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1765 1766 #endif /* ENABLE_BLE */ 1767 1768 #ifdef ENABLE_SCO_OVER_HCI 1769 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1770 // skip write synchronous flow control if not supported 1771 if (hci_stack->local_supported_commands[0] & 0x04) break; 1772 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1773 // explicit fall through to reduce repetitions 1774 1775 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1776 // skip write default erroneous data reporting if not supported 1777 if (hci_stack->local_supported_commands[0] & 0x08) break; 1778 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1779 // explicit fall through to reduce repetitions 1780 1781 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1782 // skip bcm set sco pcm config on non-Broadcom chipsets 1783 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1784 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1785 // explicit fall through to reduce repetitions 1786 1787 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1788 if (!hci_le_supported()){ 1789 // SKIP LE init for Classic only configuration 1790 hci_init_done(); 1791 return; 1792 } 1793 break; 1794 1795 #else /* !ENABLE_SCO_OVER_HCI */ 1796 1797 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1798 #ifdef ENABLE_BLE 1799 if (hci_le_supported()){ 1800 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1801 return; 1802 } 1803 #endif 1804 // SKIP LE init for Classic only configuration 1805 hci_init_done(); 1806 return; 1807 #endif /* ENABLE_SCO_OVER_HCI */ 1808 1809 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1810 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1811 // Response to command before init done state -> init done 1812 case (HCI_INIT_DONE-1): 1813 hci_init_done(); 1814 return; 1815 #endif 1816 1817 default: 1818 break; 1819 } 1820 hci_initializing_next_state(); 1821 } 1822 1823 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1824 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1825 bd_addr_t bd_address; 1826 memcpy(&bd_address, conn->address, 6); 1827 1828 #ifdef ENABLE_CLASSIC 1829 // cache needed data 1830 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1831 #endif 1832 1833 // connection failed, remove entry 1834 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1835 btstack_memory_hci_connection_free( conn ); 1836 1837 #ifdef ENABLE_CLASSIC 1838 // notify client if dedicated bonding 1839 if (notify_dedicated_bonding_failed){ 1840 log_info("hci notify_dedicated_bonding_failed"); 1841 hci_emit_dedicated_bonding_result(bd_address, status); 1842 } 1843 1844 // if authentication error, also delete link key 1845 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1846 gap_drop_link_key_for_bd_addr(bd_address); 1847 } 1848 #endif 1849 } 1850 1851 static void event_handler(uint8_t *packet, int size){ 1852 1853 uint16_t event_length = packet[1]; 1854 1855 // assert packet is complete 1856 if (size != event_length + 2){ 1857 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1858 return; 1859 } 1860 1861 bd_addr_t addr; 1862 bd_addr_type_t addr_type; 1863 hci_con_handle_t handle; 1864 hci_connection_t * conn; 1865 int i; 1866 int create_connection_cmd; 1867 1868 #ifdef ENABLE_CLASSIC 1869 uint8_t link_type; 1870 #endif 1871 1872 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1873 1874 switch (hci_event_packet_get_type(packet)) { 1875 1876 case HCI_EVENT_COMMAND_COMPLETE: 1877 // get num cmd packets - limit to 1 to reduce complexity 1878 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1879 1880 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1881 if (packet[5]) break; 1882 // terminate, name 248 chars 1883 packet[6+248] = 0; 1884 log_info("local name: %s", &packet[6]); 1885 } 1886 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1887 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1888 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1889 uint16_t acl_len = little_endian_read_16(packet, 6); 1890 uint16_t sco_len = packet[8]; 1891 1892 // determine usable ACL/SCO payload size 1893 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 1894 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 1895 1896 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1897 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1898 1899 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 1900 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1901 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1902 } 1903 } 1904 #ifdef ENABLE_BLE 1905 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1906 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1907 hci_stack->le_acl_packets_total_num = packet[8]; 1908 // determine usable ACL payload size 1909 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1910 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1911 } 1912 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1913 } 1914 #endif 1915 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1916 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_maximum_data_length)){ 1917 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 1918 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 1919 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); 1920 } 1921 #endif 1922 #ifdef ENABLE_LE_CENTRAL 1923 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1924 hci_stack->le_whitelist_capacity = packet[6]; 1925 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1926 } 1927 #endif 1928 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1929 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1930 hci_stack->local_bd_addr); 1931 log_info("Local Address, Status: 0x%02x: Addr: %s", 1932 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1933 #ifdef ENABLE_CLASSIC 1934 if (hci_stack->link_key_db){ 1935 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1936 } 1937 #endif 1938 } 1939 #ifdef ENABLE_CLASSIC 1940 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1941 hci_emit_discoverable_enabled(hci_stack->discoverable); 1942 } 1943 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_inquiry_cancel)){ 1944 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 1945 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 1946 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 1947 hci_emit_event(event, sizeof(event), 1); 1948 } 1949 } 1950 #endif 1951 1952 // Note: HCI init checks 1953 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1954 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1955 1956 #ifdef ENABLE_CLASSIC 1957 // determine usable ACL packet types based on host buffer size and supported features 1958 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1959 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1960 #endif 1961 // Classic/LE 1962 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1963 } 1964 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1965 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1966 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1967 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1968 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1969 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1970 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1971 } 1972 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1973 hci_stack->local_supported_commands[0] = 1974 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 / Read Buffer Size 1975 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 1976 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 1977 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 1978 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+34] & 0x01) << 4 | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 1979 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x08) << 2 | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 1980 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+35] & 0x20) << 1; // bit 6 = Octet 35, bit 5 / LE Set Default PHY 1981 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1982 } 1983 #ifdef ENABLE_CLASSIC 1984 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1985 if (packet[5] == 0){ 1986 hci_stack->synchronous_flow_control_enabled = 1; 1987 } 1988 } 1989 #endif 1990 break; 1991 1992 case HCI_EVENT_COMMAND_STATUS: 1993 // get num cmd packets - limit to 1 to reduce complexity 1994 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1995 1996 // check command status to detected failed outgoing connections 1997 create_connection_cmd = 0; 1998 #ifdef ENABLE_CLASSIC 1999 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2000 create_connection_cmd = 1; 2001 } 2002 #endif 2003 #ifdef ENABLE_LE_CENTRAL 2004 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2005 create_connection_cmd = 1; 2006 } 2007 #endif 2008 if (create_connection_cmd) { 2009 uint8_t status = hci_event_command_status_get_status(packet); 2010 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2011 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); 2012 2013 // reset outgoing address info 2014 memset(hci_stack->outgoing_addr, 0, 6); 2015 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2016 2017 // error => outgoing connection failed 2018 if ((conn != NULL) && (status != 0)){ 2019 hci_handle_connection_failed(conn, status); 2020 } 2021 } 2022 break; 2023 2024 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2025 int offset = 3; 2026 for (i=0; i<packet[2];i++){ 2027 handle = little_endian_read_16(packet, offset) & 0x0fff; 2028 offset += 2; 2029 uint16_t num_packets = little_endian_read_16(packet, offset); 2030 offset += 2; 2031 2032 conn = hci_connection_for_handle(handle); 2033 if (!conn){ 2034 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2035 continue; 2036 } 2037 2038 if (conn->num_packets_sent >= num_packets){ 2039 conn->num_packets_sent -= num_packets; 2040 } else { 2041 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2042 conn->num_packets_sent = 0; 2043 } 2044 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2045 2046 #ifdef ENABLE_CLASSIC 2047 // For SCO, we do the can_send_now_check here 2048 hci_notify_if_sco_can_send_now(); 2049 #endif 2050 } 2051 break; 2052 } 2053 2054 #ifdef ENABLE_CLASSIC 2055 case HCI_EVENT_INQUIRY_COMPLETE: 2056 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2057 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2058 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2059 hci_emit_event(event, sizeof(event), 1); 2060 } 2061 break; 2062 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2063 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2064 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2065 } 2066 break; 2067 case HCI_EVENT_CONNECTION_REQUEST: 2068 reverse_bd_addr(&packet[2], addr); 2069 // TODO: eval COD 8-10 2070 link_type = packet[11]; 2071 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2072 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 2073 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2074 if (!conn) { 2075 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2076 } 2077 if (!conn) { 2078 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2079 hci_stack->decline_reason = 0x0d; 2080 bd_addr_copy(hci_stack->decline_addr, addr); 2081 break; 2082 } 2083 conn->role = HCI_ROLE_SLAVE; 2084 conn->state = RECEIVED_CONNECTION_REQUEST; 2085 // store info about eSCO 2086 if (link_type == 0x02){ 2087 conn->remote_supported_feature_eSCO = 1; 2088 } 2089 hci_run(); 2090 break; 2091 2092 case HCI_EVENT_CONNECTION_COMPLETE: 2093 // Connection management 2094 reverse_bd_addr(&packet[5], addr); 2095 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2096 addr_type = BD_ADDR_TYPE_CLASSIC; 2097 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2098 if (conn) { 2099 if (!packet[2]){ 2100 conn->state = OPEN; 2101 conn->con_handle = little_endian_read_16(packet, 3); 2102 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 2103 2104 // restart timer 2105 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2106 btstack_run_loop_add_timer(&conn->timeout); 2107 2108 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2109 2110 hci_emit_nr_connections_changed(); 2111 } else { 2112 // connection failed 2113 hci_handle_connection_failed(conn, packet[2]); 2114 } 2115 } 2116 break; 2117 2118 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2119 reverse_bd_addr(&packet[5], addr); 2120 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2121 if (packet[2]){ 2122 // connection failed 2123 break; 2124 } 2125 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2126 if (!conn) { 2127 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2128 } 2129 if (!conn) { 2130 break; 2131 } 2132 conn->state = OPEN; 2133 conn->con_handle = little_endian_read_16(packet, 3); 2134 2135 #ifdef ENABLE_SCO_OVER_HCI 2136 // update SCO 2137 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2138 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2139 } 2140 #endif 2141 break; 2142 2143 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2144 handle = little_endian_read_16(packet, 3); 2145 conn = hci_connection_for_handle(handle); 2146 if (!conn) break; 2147 if (!packet[2]){ 2148 uint8_t * features = &packet[5]; 2149 if (features[6] & (1 << 3)){ 2150 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 2151 } 2152 if (features[3] & (1<<7)){ 2153 conn->remote_supported_feature_eSCO = 1; 2154 } 2155 } 2156 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2157 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 2158 if (conn->bonding_flags & BONDING_DEDICATED){ 2159 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2160 } 2161 break; 2162 2163 case HCI_EVENT_LINK_KEY_REQUEST: 2164 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2165 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2166 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2167 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2168 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2169 hci_run(); 2170 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2171 return; 2172 2173 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2174 reverse_bd_addr(&packet[2], addr); 2175 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 2176 if (!conn) break; 2177 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2178 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2179 // Change Connection Encryption keeps link key type 2180 if (link_key_type != CHANGED_COMBINATION_KEY){ 2181 conn->link_key_type = link_key_type; 2182 } 2183 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2184 // still forward event to allow dismiss of pairing dialog 2185 break; 2186 } 2187 2188 case HCI_EVENT_PIN_CODE_REQUEST: 2189 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2190 // non-bondable mode: pin code negative reply will be sent 2191 if (!hci_stack->bondable){ 2192 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2193 hci_run(); 2194 return; 2195 } 2196 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2197 if (!hci_stack->link_key_db) break; 2198 hci_event_pin_code_request_get_bd_addr(packet, addr); 2199 hci_stack->link_key_db->delete_link_key(addr); 2200 break; 2201 2202 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2203 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2204 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2205 break; 2206 2207 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2208 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2209 if (!hci_stack->ssp_auto_accept) break; 2210 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2211 break; 2212 2213 case HCI_EVENT_USER_PASSKEY_REQUEST: 2214 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2215 if (!hci_stack->ssp_auto_accept) break; 2216 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2217 break; 2218 case HCI_EVENT_MODE_CHANGE: 2219 handle = hci_event_mode_change_get_handle(packet); 2220 conn = hci_connection_for_handle(handle); 2221 if (!conn) break; 2222 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2223 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2224 break; 2225 #endif 2226 2227 case HCI_EVENT_ENCRYPTION_CHANGE: 2228 handle = little_endian_read_16(packet, 3); 2229 conn = hci_connection_for_handle(handle); 2230 if (!conn) break; 2231 if (packet[2] == 0) { 2232 if (packet[5]){ 2233 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2234 } else { 2235 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2236 } 2237 } 2238 #ifdef ENABLE_CLASSIC 2239 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2240 #endif 2241 break; 2242 2243 #ifdef ENABLE_CLASSIC 2244 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2245 handle = little_endian_read_16(packet, 3); 2246 conn = hci_connection_for_handle(handle); 2247 if (!conn) break; 2248 2249 // dedicated bonding: send result and disconnect 2250 if (conn->bonding_flags & BONDING_DEDICATED){ 2251 conn->bonding_flags &= ~BONDING_DEDICATED; 2252 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2253 conn->bonding_status = packet[2]; 2254 break; 2255 } 2256 2257 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 2258 // link key sufficient for requested security 2259 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2260 break; 2261 } 2262 // not enough 2263 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2264 break; 2265 #endif 2266 2267 // HCI_EVENT_DISCONNECTION_COMPLETE 2268 // has been split, to first notify stack before shutting connection down 2269 // see end of function, too. 2270 case HCI_EVENT_DISCONNECTION_COMPLETE: 2271 if (packet[2]) break; // status != 0 2272 handle = little_endian_read_16(packet, 3); 2273 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2274 if (hci_stack->acl_fragmentation_total_size > 0) { 2275 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2276 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0; 2277 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2278 hci_stack->acl_fragmentation_total_size = 0; 2279 hci_stack->acl_fragmentation_pos = 0; 2280 if (release_buffer){ 2281 hci_release_packet_buffer(); 2282 } 2283 } 2284 } 2285 2286 // re-enable advertisements for le connections if active 2287 conn = hci_connection_for_handle(handle); 2288 if (!conn) break; 2289 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2290 #ifdef ENABLE_BLE 2291 #ifdef ENABLE_LE_PERIPHERAL 2292 if (hci_is_le_connection(conn)){ 2293 hci_reenable_advertisements_if_needed(); 2294 } 2295 #endif 2296 #endif 2297 break; 2298 2299 case HCI_EVENT_HARDWARE_ERROR: 2300 log_error("Hardware Error: 0x%02x", packet[2]); 2301 if (hci_stack->hardware_error_callback){ 2302 (*hci_stack->hardware_error_callback)(packet[2]); 2303 } else { 2304 // if no special requests, just reboot stack 2305 hci_power_control_off(); 2306 hci_power_control_on(); 2307 } 2308 break; 2309 2310 #ifdef ENABLE_CLASSIC 2311 case HCI_EVENT_ROLE_CHANGE: 2312 if (packet[2]) break; // status != 0 2313 reverse_bd_addr(&packet[3], addr); 2314 addr_type = BD_ADDR_TYPE_CLASSIC; 2315 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2316 if (!conn) break; 2317 conn->role = packet[9]; 2318 break; 2319 #endif 2320 2321 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2322 // release packet buffer only for asynchronous transport and if there are not further fragements 2323 if (hci_transport_synchronous()) { 2324 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2325 return; // instead of break: to avoid re-entering hci_run() 2326 } 2327 hci_stack->acl_fragmentation_tx_active = 0; 2328 if (hci_stack->acl_fragmentation_total_size) break; 2329 hci_release_packet_buffer(); 2330 2331 // L2CAP receives this event via the hci_emit_event below 2332 2333 #ifdef ENABLE_CLASSIC 2334 // For SCO, we do the can_send_now_check here 2335 hci_notify_if_sco_can_send_now(); 2336 #endif 2337 break; 2338 2339 #ifdef ENABLE_CLASSIC 2340 case HCI_EVENT_SCO_CAN_SEND_NOW: 2341 // For SCO, we do the can_send_now_check here 2342 hci_notify_if_sco_can_send_now(); 2343 return; 2344 2345 // explode inquriy results for easier consumption 2346 case HCI_EVENT_INQUIRY_RESULT: 2347 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2348 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2349 gap_inquiry_explode(packet); 2350 break; 2351 #endif 2352 2353 #ifdef ENABLE_BLE 2354 case HCI_EVENT_LE_META: 2355 switch (packet[2]){ 2356 #ifdef ENABLE_LE_CENTRAL 2357 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2358 // log_info("advertising report received"); 2359 if (!hci_stack->le_scanning_enabled) break; 2360 le_handle_advertisement_report(packet, size); 2361 break; 2362 #endif 2363 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2364 // Connection management 2365 reverse_bd_addr(&packet[8], addr); 2366 addr_type = (bd_addr_type_t)packet[7]; 2367 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2368 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2369 2370 #ifdef ENABLE_LE_CENTRAL 2371 // if auto-connect, remove from whitelist in both roles 2372 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2373 hci_remove_from_whitelist(addr_type, addr); 2374 } 2375 // handle error: error is reported only to the initiator -> outgoing connection 2376 if (packet[3]){ 2377 2378 // handle cancelled outgoing connection 2379 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2380 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2381 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2382 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2383 conn = gap_get_outgoing_connection(); 2384 } 2385 2386 // outgoing connection establishment is done 2387 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2388 // remove entry 2389 if (conn){ 2390 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2391 btstack_memory_hci_connection_free( conn ); 2392 } 2393 break; 2394 } 2395 #endif 2396 // on success, both hosts receive connection complete event 2397 if (packet[6] == HCI_ROLE_MASTER){ 2398 #ifdef ENABLE_LE_CENTRAL 2399 // if we're master, it was an outgoing connection and we're done with it 2400 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2401 #endif 2402 } else { 2403 #ifdef ENABLE_LE_PERIPHERAL 2404 // if we're slave, it was an incoming connection, advertisements have stopped 2405 hci_stack->le_advertisements_active = 0; 2406 #endif 2407 } 2408 // LE connections are auto-accepted, so just create a connection if there isn't one already 2409 if (!conn){ 2410 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2411 } 2412 // no memory, sorry. 2413 if (!conn){ 2414 break; 2415 } 2416 2417 conn->state = OPEN; 2418 conn->role = packet[6]; 2419 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2420 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2421 2422 #ifdef ENABLE_LE_PERIPHERAL 2423 if (packet[6] == HCI_ROLE_SLAVE){ 2424 hci_reenable_advertisements_if_needed(); 2425 } 2426 #endif 2427 2428 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2429 2430 // restart timer 2431 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2432 // btstack_run_loop_add_timer(&conn->timeout); 2433 2434 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2435 2436 hci_emit_nr_connections_changed(); 2437 break; 2438 2439 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2440 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2441 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2442 conn = hci_connection_for_handle(handle); 2443 if (!conn) break; 2444 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2445 break; 2446 2447 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2448 // connection 2449 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2450 conn = hci_connection_for_handle(handle); 2451 if (conn) { 2452 // read arguments 2453 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2454 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2455 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2456 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2457 2458 // validate against current connection parameter range 2459 le_connection_parameter_range_t existing_range; 2460 gap_get_connection_parameter_range(&existing_range); 2461 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2462 if (update_parameter){ 2463 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2464 conn->le_conn_interval_min = le_conn_interval_min; 2465 conn->le_conn_interval_max = le_conn_interval_max; 2466 conn->le_conn_latency = le_conn_latency; 2467 conn->le_supervision_timeout = le_supervision_timeout; 2468 } else { 2469 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2470 } 2471 } 2472 break; 2473 default: 2474 break; 2475 } 2476 break; 2477 #endif 2478 case HCI_EVENT_VENDOR_SPECIFIC: 2479 // Vendor specific commands often create vendor specific event instead of num completed packets 2480 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2481 switch (hci_stack->manufacturer){ 2482 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2483 hci_stack->num_cmd_packets = 1; 2484 break; 2485 default: 2486 break; 2487 } 2488 break; 2489 default: 2490 break; 2491 } 2492 2493 // handle BT initialization 2494 if (hci_stack->state == HCI_STATE_INITIALIZING){ 2495 hci_initializing_event_handler(packet, size); 2496 } 2497 2498 // help with BT sleep 2499 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 2500 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 2501 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 2502 hci_initializing_next_state(); 2503 } 2504 2505 // notify upper stack 2506 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2507 2508 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2509 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2510 if (!packet[2]){ 2511 handle = little_endian_read_16(packet, 3); 2512 hci_connection_t * aConn = hci_connection_for_handle(handle); 2513 if (aConn) { 2514 uint8_t status = aConn->bonding_status; 2515 uint16_t flags = aConn->bonding_flags; 2516 bd_addr_t bd_address; 2517 memcpy(&bd_address, aConn->address, 6); 2518 hci_shutdown_connection(aConn); 2519 // connection struct is gone, don't access anymore 2520 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2521 hci_emit_dedicated_bonding_result(bd_address, status); 2522 } 2523 } 2524 } 2525 } 2526 2527 // execute main loop 2528 hci_run(); 2529 } 2530 2531 #ifdef ENABLE_CLASSIC 2532 2533 #define SCO_TX_AFTER_RX_MS 5 2534 2535 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2536 static void sco_schedule_tx(hci_connection_t * conn); 2537 2538 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2539 log_info("SCO TX Timeout"); 2540 hci_con_handle_t con_handle = (hci_con_handle_t) btstack_run_loop_get_timer_context(ts); 2541 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2542 if (!conn) return; 2543 2544 // schedule next 2545 sco_schedule_tx(conn); 2546 conn->sco_tx_count++; 2547 2548 // trigger send 2549 conn->sco_tx_ready = 1; 2550 hci_notify_if_sco_can_send_now(); 2551 } 2552 2553 static void sco_schedule_tx(hci_connection_t * conn){ 2554 // find next time to send 2555 uint32_t now = btstack_run_loop_get_time_ms(); 2556 uint32_t tx_ms; 2557 int time_delta_ms; 2558 while (1){ 2559 // packet delay: count(rx) - count(tx) 2560 int packet_offset = (int8_t) (conn->sco_tx_count - conn->sco_rx_count); 2561 tx_ms = conn->sco_rx_ms + ((packet_offset * 15) >> 1) + SCO_TX_AFTER_RX_MS; 2562 time_delta_ms = (int) (tx_ms - now); 2563 if (time_delta_ms > 3){ // arbitrary threshold 2564 break; 2565 } 2566 // skip packet 2567 conn->sco_tx_count++; 2568 } 2569 // 2570 log_info("SCO TX at %u in %u", (int) tx_ms, time_delta_ms); 2571 btstack_run_loop_set_timer(&conn->timeout, time_delta_ms); 2572 btstack_run_loop_set_timer_context(&conn->timeout, (void *) (uintptr_t) conn->con_handle); 2573 btstack_run_loop_set_timer_handler(&conn->timeout, &sco_tx_timeout_handler); 2574 btstack_run_loop_add_timer(&conn->timeout); 2575 } 2576 2577 static void sco_handler(uint8_t * packet, uint16_t size){ 2578 // lookup connection struct 2579 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2580 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2581 if (!conn) return; 2582 2583 int notify_sco = 0; 2584 2585 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2586 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2587 if (size == 83 && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2588 packet[2] = 0x3c; 2589 memmove(&packet[3], &packet[23], 63); 2590 size = 63; 2591 } 2592 } 2593 2594 // 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); 2595 if (hci_stack->synchronous_flow_control_enabled == 0){ 2596 uint32_t now = btstack_run_loop_get_time_ms(); 2597 if (conn->sco_rx_valid){ 2598 conn->sco_rx_count++; 2599 // expected arrival timme 2600 conn->sco_rx_ms += 7; 2601 int delta = (int32_t) (now - conn->sco_rx_ms); 2602 if (delta <= 0){ 2603 log_info("SCO NOW - EXP = %d, use +7 ms", delta); 2604 } else { 2605 conn->sco_rx_ms++; 2606 log_info("SCO NOW > EXP = %d, use +8 ms", delta); 2607 } 2608 } else { 2609 // use first timestamp as is 2610 conn->sco_rx_ms = now; 2611 conn->sco_rx_valid = 1; 2612 log_info("SCO first rx"); 2613 sco_schedule_tx(conn); 2614 } 2615 } 2616 2617 // deliver to app 2618 if (hci_stack->sco_packet_handler) { 2619 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2620 } 2621 2622 // notify app if it can send again 2623 if (notify_sco){ 2624 hci_notify_if_sco_can_send_now(); 2625 } 2626 2627 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2628 conn->num_packets_completed++; 2629 hci_stack->host_completed_packets = 1; 2630 hci_run(); 2631 #endif 2632 } 2633 #endif 2634 2635 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2636 hci_dump_packet(packet_type, 1, packet, size); 2637 switch (packet_type) { 2638 case HCI_EVENT_PACKET: 2639 event_handler(packet, size); 2640 break; 2641 case HCI_ACL_DATA_PACKET: 2642 acl_handler(packet, size); 2643 break; 2644 #ifdef ENABLE_CLASSIC 2645 case HCI_SCO_DATA_PACKET: 2646 sco_handler(packet, size); 2647 break; 2648 #endif 2649 default: 2650 break; 2651 } 2652 } 2653 2654 /** 2655 * @brief Add event packet handler. 2656 */ 2657 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2658 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2659 } 2660 2661 2662 /** Register HCI packet handlers */ 2663 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2664 hci_stack->acl_packet_handler = handler; 2665 } 2666 2667 #ifdef ENABLE_CLASSIC 2668 /** 2669 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2670 */ 2671 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2672 hci_stack->sco_packet_handler = handler; 2673 } 2674 #endif 2675 2676 static void hci_state_reset(void){ 2677 // no connections yet 2678 hci_stack->connections = NULL; 2679 2680 // keep discoverable/connectable as this has been requested by the client(s) 2681 // hci_stack->discoverable = 0; 2682 // hci_stack->connectable = 0; 2683 // hci_stack->bondable = 1; 2684 // hci_stack->own_addr_type = 0; 2685 2686 // buffer is free 2687 hci_stack->hci_packet_buffer_reserved = 0; 2688 2689 // no pending cmds 2690 hci_stack->decline_reason = 0; 2691 hci_stack->new_scan_enable_value = 0xff; 2692 2693 // LE 2694 #ifdef ENABLE_BLE 2695 memset(hci_stack->le_random_address, 0, 6); 2696 hci_stack->le_random_address_set = 0; 2697 #endif 2698 #ifdef ENABLE_LE_CENTRAL 2699 hci_stack->le_scanning_active = 0; 2700 hci_stack->le_scan_type = 0xff; 2701 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2702 hci_stack->le_whitelist = 0; 2703 hci_stack->le_whitelist_capacity = 0; 2704 #endif 2705 } 2706 2707 #ifdef ENABLE_CLASSIC 2708 /** 2709 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2710 */ 2711 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2712 // store and open remote device db 2713 hci_stack->link_key_db = link_key_db; 2714 if (hci_stack->link_key_db) { 2715 hci_stack->link_key_db->open(); 2716 } 2717 } 2718 #endif 2719 2720 void hci_init(const hci_transport_t *transport, const void *config){ 2721 2722 #ifdef HAVE_MALLOC 2723 if (!hci_stack) { 2724 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2725 } 2726 #else 2727 hci_stack = &hci_stack_static; 2728 #endif 2729 memset(hci_stack, 0, sizeof(hci_stack_t)); 2730 2731 // reference to use transport layer implementation 2732 hci_stack->hci_transport = transport; 2733 2734 // reference to used config 2735 hci_stack->config = config; 2736 2737 // setup pointer for outgoing packet buffer 2738 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2739 2740 // max acl payload size defined in config.h 2741 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2742 2743 // register packet handlers with transport 2744 transport->register_packet_handler(&packet_handler); 2745 2746 hci_stack->state = HCI_STATE_OFF; 2747 2748 // class of device 2749 hci_stack->class_of_device = 0x007a020c; // Smartphone 2750 2751 // bondable by default 2752 hci_stack->bondable = 1; 2753 2754 #ifdef ENABLE_CLASSIC 2755 // classic name 2756 hci_stack->local_name = default_classic_name; 2757 2758 // Master slave policy 2759 hci_stack->master_slave_policy = 1; 2760 #endif 2761 2762 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2763 hci_stack->ssp_enable = 1; 2764 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2765 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2766 hci_stack->ssp_auto_accept = 1; 2767 2768 // voice setting - signed 16 bit pcm data with CVSD over the air 2769 hci_stack->sco_voice_setting = 0x60; 2770 2771 #ifdef ENABLE_LE_CENTRAL 2772 // connection parameter to use for outgoing connections 2773 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 2774 hci_stack->le_connection_scan_window = 0x0030; // 30ms 2775 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 2776 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 2777 hci_stack->le_connection_latency = 4; // 4 2778 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 2779 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 2780 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 2781 #endif 2782 2783 #ifdef ENABLE_LE_PERIPHERAL 2784 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 2785 #endif 2786 2787 // connection parameter range used to answer connection parameter update requests in l2cap 2788 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2789 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2790 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2791 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2792 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2793 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2794 2795 hci_state_reset(); 2796 } 2797 2798 /** 2799 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2800 */ 2801 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2802 hci_stack->chipset = chipset_driver; 2803 2804 // reset chipset driver - init is also called on power_up 2805 if (hci_stack->chipset && hci_stack->chipset->init){ 2806 hci_stack->chipset->init(hci_stack->config); 2807 } 2808 } 2809 2810 /** 2811 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2812 */ 2813 void hci_set_control(const btstack_control_t *hardware_control){ 2814 // references to used control implementation 2815 hci_stack->control = hardware_control; 2816 // init with transport config 2817 hardware_control->init(hci_stack->config); 2818 } 2819 2820 void hci_close(void){ 2821 // close remote device db 2822 if (hci_stack->link_key_db) { 2823 hci_stack->link_key_db->close(); 2824 } 2825 2826 btstack_linked_list_iterator_t lit; 2827 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2828 while (btstack_linked_list_iterator_has_next(&lit)){ 2829 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2830 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2831 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2832 hci_shutdown_connection(connection); 2833 } 2834 2835 hci_power_control(HCI_POWER_OFF); 2836 2837 #ifdef HAVE_MALLOC 2838 free(hci_stack); 2839 #endif 2840 hci_stack = NULL; 2841 } 2842 2843 #ifdef ENABLE_CLASSIC 2844 void gap_set_class_of_device(uint32_t class_of_device){ 2845 hci_stack->class_of_device = class_of_device; 2846 } 2847 2848 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 2849 hci_stack->default_link_policy_settings = default_link_policy_settings; 2850 } 2851 2852 void hci_disable_l2cap_timeout_check(void){ 2853 disable_l2cap_timeouts = 1; 2854 } 2855 #endif 2856 2857 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2858 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2859 void hci_set_bd_addr(bd_addr_t addr){ 2860 memcpy(hci_stack->custom_bd_addr, addr, 6); 2861 hci_stack->custom_bd_addr_set = 1; 2862 } 2863 #endif 2864 2865 // State-Module-Driver overview 2866 // state module low-level 2867 // HCI_STATE_OFF off close 2868 // HCI_STATE_INITIALIZING, on open 2869 // HCI_STATE_WORKING, on open 2870 // HCI_STATE_HALTING, on open 2871 // HCI_STATE_SLEEPING, off/sleep close 2872 // HCI_STATE_FALLING_ASLEEP on open 2873 2874 static int hci_power_control_on(void){ 2875 2876 // power on 2877 int err = 0; 2878 if (hci_stack->control && hci_stack->control->on){ 2879 err = (*hci_stack->control->on)(); 2880 } 2881 if (err){ 2882 log_error( "POWER_ON failed"); 2883 hci_emit_hci_open_failed(); 2884 return err; 2885 } 2886 2887 // int chipset driver 2888 if (hci_stack->chipset && hci_stack->chipset->init){ 2889 hci_stack->chipset->init(hci_stack->config); 2890 } 2891 2892 // init transport 2893 if (hci_stack->hci_transport->init){ 2894 hci_stack->hci_transport->init(hci_stack->config); 2895 } 2896 2897 // open transport 2898 err = hci_stack->hci_transport->open(); 2899 if (err){ 2900 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2901 if (hci_stack->control && hci_stack->control->off){ 2902 (*hci_stack->control->off)(); 2903 } 2904 hci_emit_hci_open_failed(); 2905 return err; 2906 } 2907 return 0; 2908 } 2909 2910 static void hci_power_control_off(void){ 2911 2912 log_info("hci_power_control_off"); 2913 2914 // close low-level device 2915 hci_stack->hci_transport->close(); 2916 2917 log_info("hci_power_control_off - hci_transport closed"); 2918 2919 // power off 2920 if (hci_stack->control && hci_stack->control->off){ 2921 (*hci_stack->control->off)(); 2922 } 2923 2924 log_info("hci_power_control_off - control closed"); 2925 2926 hci_stack->state = HCI_STATE_OFF; 2927 } 2928 2929 static void hci_power_control_sleep(void){ 2930 2931 log_info("hci_power_control_sleep"); 2932 2933 #if 0 2934 // don't close serial port during sleep 2935 2936 // close low-level device 2937 hci_stack->hci_transport->close(hci_stack->config); 2938 #endif 2939 2940 // sleep mode 2941 if (hci_stack->control && hci_stack->control->sleep){ 2942 (*hci_stack->control->sleep)(); 2943 } 2944 2945 hci_stack->state = HCI_STATE_SLEEPING; 2946 } 2947 2948 static int hci_power_control_wake(void){ 2949 2950 log_info("hci_power_control_wake"); 2951 2952 // wake on 2953 if (hci_stack->control && hci_stack->control->wake){ 2954 (*hci_stack->control->wake)(); 2955 } 2956 2957 #if 0 2958 // open low-level device 2959 int err = hci_stack->hci_transport->open(hci_stack->config); 2960 if (err){ 2961 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2962 if (hci_stack->control && hci_stack->control->off){ 2963 (*hci_stack->control->off)(); 2964 } 2965 hci_emit_hci_open_failed(); 2966 return err; 2967 } 2968 #endif 2969 2970 return 0; 2971 } 2972 2973 static void hci_power_transition_to_initializing(void){ 2974 // set up state machine 2975 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2976 hci_stack->hci_packet_buffer_reserved = 0; 2977 hci_stack->state = HCI_STATE_INITIALIZING; 2978 hci_stack->substate = HCI_INIT_SEND_RESET; 2979 } 2980 2981 int hci_power_control(HCI_POWER_MODE power_mode){ 2982 2983 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2984 2985 int err = 0; 2986 switch (hci_stack->state){ 2987 2988 case HCI_STATE_OFF: 2989 switch (power_mode){ 2990 case HCI_POWER_ON: 2991 err = hci_power_control_on(); 2992 if (err) { 2993 log_error("hci_power_control_on() error %d", err); 2994 return err; 2995 } 2996 hci_power_transition_to_initializing(); 2997 break; 2998 case HCI_POWER_OFF: 2999 // do nothing 3000 break; 3001 case HCI_POWER_SLEEP: 3002 // do nothing (with SLEEP == OFF) 3003 break; 3004 } 3005 break; 3006 3007 case HCI_STATE_INITIALIZING: 3008 switch (power_mode){ 3009 case HCI_POWER_ON: 3010 // do nothing 3011 break; 3012 case HCI_POWER_OFF: 3013 // no connections yet, just turn it off 3014 hci_power_control_off(); 3015 break; 3016 case HCI_POWER_SLEEP: 3017 // no connections yet, just turn it off 3018 hci_power_control_sleep(); 3019 break; 3020 } 3021 break; 3022 3023 case HCI_STATE_WORKING: 3024 switch (power_mode){ 3025 case HCI_POWER_ON: 3026 // do nothing 3027 break; 3028 case HCI_POWER_OFF: 3029 // see hci_run 3030 hci_stack->state = HCI_STATE_HALTING; 3031 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3032 break; 3033 case HCI_POWER_SLEEP: 3034 // see hci_run 3035 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3036 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3037 break; 3038 } 3039 break; 3040 3041 case HCI_STATE_HALTING: 3042 switch (power_mode){ 3043 case HCI_POWER_ON: 3044 hci_power_transition_to_initializing(); 3045 break; 3046 case HCI_POWER_OFF: 3047 // do nothing 3048 break; 3049 case HCI_POWER_SLEEP: 3050 // see hci_run 3051 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3052 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3053 break; 3054 } 3055 break; 3056 3057 case HCI_STATE_FALLING_ASLEEP: 3058 switch (power_mode){ 3059 case HCI_POWER_ON: 3060 3061 #ifdef HAVE_PLATFORM_IPHONE_OS 3062 // nothing to do, if H4 supports power management 3063 if (btstack_control_iphone_power_management_enabled()){ 3064 hci_stack->state = HCI_STATE_INITIALIZING; 3065 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3066 break; 3067 } 3068 #endif 3069 hci_power_transition_to_initializing(); 3070 break; 3071 case HCI_POWER_OFF: 3072 // see hci_run 3073 hci_stack->state = HCI_STATE_HALTING; 3074 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3075 break; 3076 case HCI_POWER_SLEEP: 3077 // do nothing 3078 break; 3079 } 3080 break; 3081 3082 case HCI_STATE_SLEEPING: 3083 switch (power_mode){ 3084 case HCI_POWER_ON: 3085 3086 #ifdef HAVE_PLATFORM_IPHONE_OS 3087 // nothing to do, if H4 supports power management 3088 if (btstack_control_iphone_power_management_enabled()){ 3089 hci_stack->state = HCI_STATE_INITIALIZING; 3090 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3091 hci_update_scan_enable(); 3092 break; 3093 } 3094 #endif 3095 err = hci_power_control_wake(); 3096 if (err) return err; 3097 hci_power_transition_to_initializing(); 3098 break; 3099 case HCI_POWER_OFF: 3100 hci_stack->state = HCI_STATE_HALTING; 3101 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3102 break; 3103 case HCI_POWER_SLEEP: 3104 // do nothing 3105 break; 3106 } 3107 break; 3108 } 3109 3110 // create internal event 3111 hci_emit_state(); 3112 3113 // trigger next/first action 3114 hci_run(); 3115 3116 return 0; 3117 } 3118 3119 3120 #ifdef ENABLE_CLASSIC 3121 3122 static void hci_update_scan_enable(void){ 3123 // 2 = page scan, 1 = inq scan 3124 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 3125 hci_run(); 3126 } 3127 3128 void gap_discoverable_control(uint8_t enable){ 3129 if (enable) enable = 1; // normalize argument 3130 3131 if (hci_stack->discoverable == enable){ 3132 hci_emit_discoverable_enabled(hci_stack->discoverable); 3133 return; 3134 } 3135 3136 hci_stack->discoverable = enable; 3137 hci_update_scan_enable(); 3138 } 3139 3140 void gap_connectable_control(uint8_t enable){ 3141 if (enable) enable = 1; // normalize argument 3142 3143 // don't emit event 3144 if (hci_stack->connectable == enable) return; 3145 3146 hci_stack->connectable = enable; 3147 hci_update_scan_enable(); 3148 } 3149 #endif 3150 3151 void gap_local_bd_addr(bd_addr_t address_buffer){ 3152 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3153 } 3154 3155 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3156 static void hci_host_num_completed_packets(void){ 3157 3158 // create packet manually as arrays are not supported and num_commands should not get reduced 3159 hci_reserve_packet_buffer(); 3160 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3161 3162 uint16_t size = 0; 3163 uint16_t num_handles = 0; 3164 packet[size++] = 0x35; 3165 packet[size++] = 0x0c; 3166 size++; // skip param len 3167 size++; // skip num handles 3168 3169 // add { handle, packets } entries 3170 btstack_linked_item_t * it; 3171 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3172 hci_connection_t * connection = (hci_connection_t *) it; 3173 if (connection->num_packets_completed){ 3174 little_endian_store_16(packet, size, connection->con_handle); 3175 size += 2; 3176 little_endian_store_16(packet, size, connection->num_packets_completed); 3177 size += 2; 3178 // 3179 num_handles++; 3180 connection->num_packets_completed = 0; 3181 } 3182 } 3183 3184 packet[2] = size - 3; 3185 packet[3] = num_handles; 3186 3187 hci_stack->host_completed_packets = 0; 3188 3189 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3190 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3191 3192 // release packet buffer for synchronous transport implementations 3193 if (hci_transport_synchronous()){ 3194 hci_release_packet_buffer(); 3195 hci_emit_transport_packet_sent(); 3196 } 3197 } 3198 #endif 3199 3200 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3201 UNUSED(ds); 3202 hci_stack->substate = HCI_HALTING_CLOSE; 3203 // allow packet handlers to defer final shutdown 3204 hci_emit_state(); 3205 hci_run(); 3206 } 3207 3208 static void hci_run(void){ 3209 3210 // log_info("hci_run: entered"); 3211 btstack_linked_item_t * it; 3212 3213 // send continuation fragments first, as they block the prepared packet buffer 3214 if (hci_stack->acl_fragmentation_total_size > 0) { 3215 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3216 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3217 if (connection) { 3218 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3219 hci_send_acl_packet_fragments(connection); 3220 return; 3221 } 3222 } else { 3223 // connection gone -> discard further fragments 3224 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3225 hci_stack->acl_fragmentation_total_size = 0; 3226 hci_stack->acl_fragmentation_pos = 0; 3227 } 3228 } 3229 3230 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3231 // send host num completed packets next as they don't require num_cmd_packets > 0 3232 if (!hci_can_send_comand_packet_transport()) return; 3233 if (hci_stack->host_completed_packets){ 3234 hci_host_num_completed_packets(); 3235 return; 3236 } 3237 #endif 3238 3239 if (!hci_can_send_command_packet_now()) return; 3240 3241 // global/non-connection oriented commands 3242 3243 #ifdef ENABLE_CLASSIC 3244 // decline incoming connections 3245 if (hci_stack->decline_reason){ 3246 uint8_t reason = hci_stack->decline_reason; 3247 hci_stack->decline_reason = 0; 3248 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3249 return; 3250 } 3251 // send scan enable 3252 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 3253 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3254 hci_stack->new_scan_enable_value = 0xff; 3255 return; 3256 } 3257 // start/stop inquiry 3258 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX){ 3259 uint8_t duration = hci_stack->inquiry_state; 3260 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3261 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3262 return; 3263 } 3264 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3265 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3266 hci_send_cmd(&hci_inquiry_cancel); 3267 return; 3268 } 3269 // remote name request 3270 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3271 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3272 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3273 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3274 return; 3275 } 3276 // pairing 3277 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3278 uint8_t state = hci_stack->gap_pairing_state; 3279 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3280 switch (state){ 3281 case GAP_PAIRING_STATE_SEND_PIN: 3282 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); 3283 break; 3284 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3285 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3286 break; 3287 case GAP_PAIRING_STATE_SEND_PASSKEY: 3288 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3289 break; 3290 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3291 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3292 break; 3293 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3294 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3295 break; 3296 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3297 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3298 break; 3299 default: 3300 break; 3301 } 3302 return; 3303 } 3304 #endif 3305 3306 #ifdef ENABLE_BLE 3307 // advertisements, active scanning, and creating connections requires randaom address to be set if using private address 3308 if ((hci_stack->state == HCI_STATE_WORKING) 3309 && (hci_stack->le_own_addr_type == BD_ADDR_TYPE_LE_PUBLIC || hci_stack->le_random_address_set)){ 3310 3311 #ifdef ENABLE_LE_CENTRAL 3312 // handle le scan 3313 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3314 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3315 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3316 return; 3317 } 3318 if (hci_stack->le_scan_type != 0xff){ 3319 // defaults: active scanning, accept all advertisement packets 3320 int scan_type = hci_stack->le_scan_type; 3321 hci_stack->le_scan_type = 0xff; 3322 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); 3323 return; 3324 } 3325 #endif 3326 #ifdef ENABLE_LE_PERIPHERAL 3327 // le advertisement control 3328 if (hci_stack->le_advertisements_todo){ 3329 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3330 } 3331 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3332 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3333 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3334 return; 3335 } 3336 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3337 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3338 hci_send_cmd(&hci_le_set_advertising_parameters, 3339 hci_stack->le_advertisements_interval_min, 3340 hci_stack->le_advertisements_interval_max, 3341 hci_stack->le_advertisements_type, 3342 hci_stack->le_own_addr_type, 3343 hci_stack->le_advertisements_direct_address_type, 3344 hci_stack->le_advertisements_direct_address, 3345 hci_stack->le_advertisements_channel_map, 3346 hci_stack->le_advertisements_filter_policy); 3347 return; 3348 } 3349 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3350 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3351 uint8_t adv_data_clean[31]; 3352 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3353 memcpy(adv_data_clean, hci_stack->le_advertisements_data, hci_stack->le_advertisements_data_len); 3354 hci_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len); 3355 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3356 return; 3357 } 3358 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3359 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3360 uint8_t scan_data_clean[31]; 3361 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3362 memcpy(scan_data_clean, hci_stack->le_scan_response_data, hci_stack->le_scan_response_data_len); 3363 hci_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len); 3364 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, hci_stack->le_scan_response_data); 3365 return; 3366 } 3367 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3368 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3369 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3370 return; 3371 } 3372 #endif 3373 3374 #ifdef ENABLE_LE_CENTRAL 3375 // 3376 // LE Whitelist Management 3377 // 3378 3379 // check if whitelist needs modification 3380 btstack_linked_list_iterator_t lit; 3381 int modification_pending = 0; 3382 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3383 while (btstack_linked_list_iterator_has_next(&lit)){ 3384 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3385 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3386 modification_pending = 1; 3387 break; 3388 } 3389 } 3390 3391 if (modification_pending){ 3392 // stop connnecting if modification pending 3393 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3394 hci_send_cmd(&hci_le_create_connection_cancel); 3395 return; 3396 } 3397 3398 // add/remove entries 3399 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3400 while (btstack_linked_list_iterator_has_next(&lit)){ 3401 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3402 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3403 entry->state = LE_WHITELIST_ON_CONTROLLER; 3404 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3405 return; 3406 3407 } 3408 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3409 bd_addr_t address; 3410 bd_addr_type_t address_type = entry->address_type; 3411 memcpy(address, entry->address, 6); 3412 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3413 btstack_memory_whitelist_entry_free(entry); 3414 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3415 return; 3416 } 3417 } 3418 } 3419 3420 // start connecting 3421 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 3422 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3423 bd_addr_t null_addr; 3424 memset(null_addr, 0, 6); 3425 hci_send_cmd(&hci_le_create_connection, 3426 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3427 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3428 1, // use whitelist 3429 0, // peer address type 3430 null_addr, // peer bd addr 3431 hci_stack->le_own_addr_type, // our addr type: 3432 hci_stack->le_connection_interval_min, // conn interval min 3433 hci_stack->le_connection_interval_max, // conn interval max 3434 hci_stack->le_connection_latency, // conn latency 3435 hci_stack->le_supervision_timeout, // conn latency 3436 hci_stack->le_minimum_ce_length, // min ce length 3437 hci_stack->le_maximum_ce_length // max ce length 3438 ); 3439 return; 3440 } 3441 #endif 3442 } 3443 #endif 3444 3445 // send pending HCI commands 3446 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3447 hci_connection_t * connection = (hci_connection_t *) it; 3448 3449 switch(connection->state){ 3450 case SEND_CREATE_CONNECTION: 3451 switch(connection->address_type){ 3452 #ifdef ENABLE_CLASSIC 3453 case BD_ADDR_TYPE_CLASSIC: 3454 log_info("sending hci_create_connection"); 3455 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 3456 break; 3457 #endif 3458 default: 3459 #ifdef ENABLE_BLE 3460 #ifdef ENABLE_LE_CENTRAL 3461 // track outgoing connection 3462 hci_stack->outgoing_addr_type = connection->address_type; 3463 memcpy(hci_stack->outgoing_addr, connection->address, 6); 3464 log_info("sending hci_le_create_connection"); 3465 hci_send_cmd(&hci_le_create_connection, 3466 hci_stack->le_connection_scan_interval, // conn scan interval 3467 hci_stack->le_connection_scan_window, // conn scan windows 3468 0, // don't use whitelist 3469 connection->address_type, // peer address type 3470 connection->address, // peer bd addr 3471 hci_stack->le_own_addr_type, // our addr type: 3472 hci_stack->le_connection_interval_min, // conn interval min 3473 hci_stack->le_connection_interval_max, // conn interval max 3474 hci_stack->le_connection_latency, // conn latency 3475 hci_stack->le_supervision_timeout, // conn latency 3476 hci_stack->le_minimum_ce_length, // min ce length 3477 hci_stack->le_maximum_ce_length // max ce length 3478 ); 3479 connection->state = SENT_CREATE_CONNECTION; 3480 #endif 3481 #endif 3482 break; 3483 } 3484 return; 3485 3486 #ifdef ENABLE_CLASSIC 3487 case RECEIVED_CONNECTION_REQUEST: 3488 connection->role = HCI_ROLE_SLAVE; 3489 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 3490 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 3491 connection->state = ACCEPTED_CONNECTION_REQUEST; 3492 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3493 } 3494 return; 3495 #endif 3496 3497 #ifdef ENABLE_BLE 3498 #ifdef ENABLE_LE_CENTRAL 3499 case SEND_CANCEL_CONNECTION: 3500 connection->state = SENT_CANCEL_CONNECTION; 3501 hci_send_cmd(&hci_le_create_connection_cancel); 3502 return; 3503 #endif 3504 #endif 3505 case SEND_DISCONNECT: 3506 connection->state = SENT_DISCONNECT; 3507 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3508 return; 3509 3510 default: 3511 break; 3512 } 3513 3514 // no further commands if connection is about to get shut down 3515 if (connection->state == SENT_DISCONNECT) continue; 3516 3517 #ifdef ENABLE_CLASSIC 3518 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3519 log_info("responding to link key request"); 3520 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3521 link_key_t link_key; 3522 link_key_type_t link_key_type; 3523 if ( hci_stack->link_key_db 3524 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 3525 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 3526 connection->link_key_type = link_key_type; 3527 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3528 } else { 3529 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3530 } 3531 return; 3532 } 3533 3534 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3535 log_info("denying to pin request"); 3536 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3537 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3538 return; 3539 } 3540 3541 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3542 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3543 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3544 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3545 // tweak authentication requirements 3546 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3547 if (connection->bonding_flags & BONDING_DEDICATED){ 3548 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3549 } 3550 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3551 authreq |= 1; 3552 } 3553 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3554 } else { 3555 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3556 } 3557 return; 3558 } 3559 3560 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3561 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3562 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3563 return; 3564 } 3565 3566 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3567 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3568 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3569 return; 3570 } 3571 3572 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 3573 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 3574 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3575 return; 3576 } 3577 3578 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3579 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3580 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3581 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 3582 return; 3583 } 3584 3585 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3586 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3587 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3588 return; 3589 } 3590 3591 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3592 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3593 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3594 return; 3595 } 3596 #endif 3597 3598 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3599 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3600 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 3601 return; 3602 } 3603 3604 #ifdef ENABLE_CLASSIC 3605 uint16_t sniff_min_interval; 3606 switch (connection->sniff_min_interval){ 3607 case 0: 3608 break; 3609 case 0xffff: 3610 connection->sniff_min_interval = 0; 3611 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3612 return; 3613 default: 3614 sniff_min_interval = connection->sniff_min_interval; 3615 connection->sniff_min_interval = 0; 3616 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3617 return; 3618 } 3619 #endif 3620 3621 #ifdef ENABLE_BLE 3622 switch (connection->le_con_parameter_update_state){ 3623 // response to L2CAP CON PARAMETER UPDATE REQUEST 3624 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3625 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3626 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3627 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3628 0x0000, 0xffff); 3629 return; 3630 case CON_PARAMETER_UPDATE_REPLY: 3631 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3632 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3633 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3634 0x0000, 0xffff); 3635 return; 3636 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3637 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3638 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3639 return; 3640 default: 3641 break; 3642 } 3643 if (connection->le_phy_update_all_phys != 0xff){ 3644 uint8_t all_phys = connection->le_phy_update_all_phys; 3645 connection->le_phy_update_all_phys = 0xff; 3646 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); 3647 return; 3648 } 3649 #endif 3650 } 3651 3652 hci_connection_t * connection; 3653 switch (hci_stack->state){ 3654 case HCI_STATE_INITIALIZING: 3655 hci_initializing_run(); 3656 break; 3657 3658 case HCI_STATE_HALTING: 3659 3660 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 3661 switch (hci_stack->substate){ 3662 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 3663 case HCI_HALTING_DISCONNECT_ALL_TIMER: 3664 3665 #ifdef ENABLE_BLE 3666 #ifdef ENABLE_LE_CENTRAL 3667 // free whitelist entries 3668 { 3669 btstack_linked_list_iterator_t lit; 3670 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3671 while (btstack_linked_list_iterator_has_next(&lit)){ 3672 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3673 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3674 btstack_memory_whitelist_entry_free(entry); 3675 } 3676 } 3677 #endif 3678 #endif 3679 // close all open connections 3680 connection = (hci_connection_t *) hci_stack->connections; 3681 if (connection){ 3682 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 3683 if (!hci_can_send_command_packet_now()) return; 3684 3685 // check state 3686 if (connection->state == SENT_DISCONNECT) return; 3687 connection->state = SENT_DISCONNECT; 3688 3689 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 3690 3691 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 3692 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 3693 3694 // ... which would be ignored anyway as we shutdown (free) the connection now 3695 hci_shutdown_connection(connection); 3696 3697 // finally, send the disconnect command 3698 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 3699 return; 3700 } 3701 3702 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 3703 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 3704 log_info("HCI_STATE_HALTING: wait 50 ms"); 3705 hci_stack->substate = HCI_HALTING_W4_TIMER; 3706 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 3707 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3708 btstack_run_loop_add_timer(&hci_stack->timeout); 3709 break; 3710 } 3711 3712 /* explicit fall-through */ 3713 3714 case HCI_HALTING_CLOSE: 3715 log_info("HCI_STATE_HALTING, calling off"); 3716 3717 // switch mode 3718 hci_power_control_off(); 3719 3720 log_info("HCI_STATE_HALTING, emitting state"); 3721 hci_emit_state(); 3722 log_info("HCI_STATE_HALTING, done"); 3723 break; 3724 3725 case HCI_HALTING_W4_TIMER: 3726 // keep waiting 3727 3728 break; 3729 default: 3730 break; 3731 } 3732 3733 break; 3734 3735 case HCI_STATE_FALLING_ASLEEP: 3736 switch(hci_stack->substate) { 3737 case HCI_FALLING_ASLEEP_DISCONNECT: 3738 log_info("HCI_STATE_FALLING_ASLEEP"); 3739 // close all open connections 3740 connection = (hci_connection_t *) hci_stack->connections; 3741 3742 #ifdef HAVE_PLATFORM_IPHONE_OS 3743 // don't close connections, if H4 supports power management 3744 if (btstack_control_iphone_power_management_enabled()){ 3745 connection = NULL; 3746 } 3747 #endif 3748 if (connection){ 3749 3750 // send disconnect 3751 if (!hci_can_send_command_packet_now()) return; 3752 3753 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 3754 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 3755 3756 // send disconnected event right away - causes higher layer connections to get closed, too. 3757 hci_shutdown_connection(connection); 3758 return; 3759 } 3760 3761 if (hci_classic_supported()){ 3762 // disable page and inquiry scan 3763 if (!hci_can_send_command_packet_now()) return; 3764 3765 log_info("HCI_STATE_HALTING, disabling inq scans"); 3766 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 3767 3768 // continue in next sub state 3769 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 3770 break; 3771 } 3772 // no break - fall through for ble-only chips 3773 3774 case HCI_FALLING_ASLEEP_COMPLETE: 3775 log_info("HCI_STATE_HALTING, calling sleep"); 3776 #ifdef HAVE_PLATFORM_IPHONE_OS 3777 // don't actually go to sleep, if H4 supports power management 3778 if (btstack_control_iphone_power_management_enabled()){ 3779 // SLEEP MODE reached 3780 hci_stack->state = HCI_STATE_SLEEPING; 3781 hci_emit_state(); 3782 break; 3783 } 3784 #endif 3785 // switch mode 3786 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 3787 hci_emit_state(); 3788 break; 3789 3790 default: 3791 break; 3792 } 3793 break; 3794 3795 default: 3796 break; 3797 } 3798 } 3799 3800 int hci_send_cmd_packet(uint8_t *packet, int size){ 3801 // house-keeping 3802 3803 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 3804 hci_stack->loopback_mode = packet[3]; 3805 } 3806 3807 #ifdef ENABLE_CLASSIC 3808 bd_addr_t addr; 3809 hci_connection_t * conn; 3810 3811 // create_connection? 3812 if (IS_COMMAND(packet, hci_create_connection)){ 3813 reverse_bd_addr(&packet[3], addr); 3814 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3815 3816 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3817 if (!conn){ 3818 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3819 if (!conn){ 3820 // notify client that alloc failed 3821 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3822 return -1; // packet not sent to controller 3823 } 3824 conn->state = SEND_CREATE_CONNECTION; 3825 } 3826 log_info("conn state %u", conn->state); 3827 switch (conn->state){ 3828 // if connection active exists 3829 case OPEN: 3830 // and OPEN, emit connection complete command 3831 hci_emit_connection_complete(addr, conn->con_handle, 0); 3832 return -1; // packet not sent to controller 3833 case SEND_CREATE_CONNECTION: 3834 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 3835 break; 3836 default: 3837 // otherwise, just ignore as it is already in the open process 3838 return -1; // packet not sent to controller 3839 } 3840 conn->state = SENT_CREATE_CONNECTION; 3841 3842 // track outgoing connection 3843 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_CLASSIC; 3844 memcpy(hci_stack->outgoing_addr, addr, 6); 3845 } 3846 3847 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3848 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3849 } 3850 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3851 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3852 } 3853 3854 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3855 if (hci_stack->link_key_db){ 3856 reverse_bd_addr(&packet[3], addr); 3857 hci_stack->link_key_db->delete_link_key(addr); 3858 } 3859 } 3860 3861 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3862 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3863 reverse_bd_addr(&packet[3], addr); 3864 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3865 if (conn){ 3866 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3867 } 3868 } 3869 3870 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3871 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3872 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3873 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3874 reverse_bd_addr(&packet[3], addr); 3875 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3876 if (conn){ 3877 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3878 } 3879 } 3880 3881 #ifdef ENABLE_SCO_OVER_HCI 3882 // setup_synchronous_connection? Voice setting at offset 22 3883 if (IS_COMMAND(packet, hci_setup_synchronous_connection)){ 3884 // TODO: compare to current setting if sco connection already active 3885 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 3886 } 3887 // accept_synchronus_connection? Voice setting at offset 18 3888 if (IS_COMMAND(packet, hci_accept_synchronous_connection)){ 3889 // TODO: compare to current setting if sco connection already active 3890 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 3891 } 3892 #endif 3893 #endif 3894 3895 #ifdef ENABLE_BLE 3896 #ifdef ENABLE_LE_PERIPHERAL 3897 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3898 hci_stack->le_random_address_set = 1; 3899 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 3900 } 3901 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3902 hci_stack->le_advertisements_active = packet[3]; 3903 } 3904 #endif 3905 #ifdef ENABLE_LE_CENTRAL 3906 if (IS_COMMAND(packet, hci_le_create_connection)){ 3907 // white list used? 3908 uint8_t initiator_filter_policy = packet[7]; 3909 switch (initiator_filter_policy){ 3910 case 0: 3911 // whitelist not used 3912 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3913 break; 3914 case 1: 3915 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3916 break; 3917 default: 3918 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3919 break; 3920 } 3921 } 3922 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3923 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3924 } 3925 #endif 3926 #endif 3927 3928 hci_stack->num_cmd_packets--; 3929 3930 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3931 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3932 } 3933 3934 // disconnect because of security block 3935 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3936 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3937 if (!connection) return; 3938 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3939 } 3940 3941 3942 // Configure Secure Simple Pairing 3943 3944 #ifdef ENABLE_CLASSIC 3945 3946 // enable will enable SSP during init 3947 void gap_ssp_set_enable(int enable){ 3948 hci_stack->ssp_enable = enable; 3949 } 3950 3951 static int hci_local_ssp_activated(void){ 3952 return gap_ssp_supported() && hci_stack->ssp_enable; 3953 } 3954 3955 // if set, BTstack will respond to io capability request using authentication requirement 3956 void gap_ssp_set_io_capability(int io_capability){ 3957 hci_stack->ssp_io_capability = io_capability; 3958 } 3959 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3960 hci_stack->ssp_authentication_requirement = authentication_requirement; 3961 } 3962 3963 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3964 void gap_ssp_set_auto_accept(int auto_accept){ 3965 hci_stack->ssp_auto_accept = auto_accept; 3966 } 3967 #endif 3968 3969 // va_list part of hci_send_cmd 3970 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3971 if (!hci_can_send_command_packet_now()){ 3972 log_error("hci_send_cmd called but cannot send packet now"); 3973 return 0; 3974 } 3975 3976 // for HCI INITIALIZATION 3977 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3978 hci_stack->last_cmd_opcode = cmd->opcode; 3979 3980 hci_reserve_packet_buffer(); 3981 uint8_t * packet = hci_stack->hci_packet_buffer; 3982 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3983 int err = hci_send_cmd_packet(packet, size); 3984 3985 // release packet buffer for synchronous transport implementations 3986 if (hci_transport_synchronous()){ 3987 hci_release_packet_buffer(); 3988 hci_emit_transport_packet_sent(); 3989 } 3990 3991 return err; 3992 } 3993 3994 /** 3995 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3996 */ 3997 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3998 va_list argptr; 3999 va_start(argptr, cmd); 4000 int res = hci_send_cmd_va_arg(cmd, argptr); 4001 va_end(argptr); 4002 return res; 4003 } 4004 4005 // Create various non-HCI events. 4006 // TODO: generalize, use table similar to hci_create_command 4007 4008 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4009 // dump packet 4010 if (dump) { 4011 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4012 } 4013 4014 // dispatch to all event handlers 4015 btstack_linked_list_iterator_t it; 4016 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4017 while (btstack_linked_list_iterator_has_next(&it)){ 4018 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4019 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4020 } 4021 } 4022 4023 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4024 if (!hci_stack->acl_packet_handler) return; 4025 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4026 } 4027 4028 #ifdef ENABLE_CLASSIC 4029 static void hci_notify_if_sco_can_send_now(void){ 4030 // notify SCO sender if waiting 4031 if (!hci_stack->sco_waiting_for_can_send_now) return; 4032 if (hci_can_send_sco_packet_now()){ 4033 hci_stack->sco_waiting_for_can_send_now = 0; 4034 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4035 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4036 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4037 } 4038 } 4039 4040 // parsing end emitting has been merged to reduce code size 4041 static void gap_inquiry_explode(uint8_t * packet){ 4042 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4043 4044 uint8_t * eir_data; 4045 ad_context_t context; 4046 const uint8_t * name; 4047 uint8_t name_len; 4048 4049 int event_type = hci_event_packet_get_type(packet); 4050 int num_reserved_fields = event_type == HCI_EVENT_INQUIRY_RESULT ? 2 : 1; // 2 for old event, 1 otherwise 4051 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4052 4053 // event[1] is set at the end 4054 int i; 4055 for (i=0; i<num_responses;i++){ 4056 memset(event, 0, sizeof(event)); 4057 event[0] = GAP_EVENT_INQUIRY_RESULT; 4058 uint8_t event_size = 18; // if name is not set by EIR 4059 4060 memcpy(&event[2], &packet[3 + i*6], 6); // bd_addr 4061 event[8] = packet[3 + num_responses*(6) + i*1]; // page_scan_repetition_mode 4062 memcpy(&event[9], &packet[3 + num_responses*(6+1+num_reserved_fields) + i*3], 3); // class of device 4063 memcpy(&event[12], &packet[3 + num_responses*(6+1+num_reserved_fields+3) + i*2], 2); // clock offset 4064 4065 switch (event_type){ 4066 case HCI_EVENT_INQUIRY_RESULT: 4067 // 14,15,16,17 = 0, size 18 4068 break; 4069 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4070 event[14] = 1; 4071 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 4072 // 16,17 = 0, size 18 4073 break; 4074 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4075 event[14] = 1; 4076 event[15] = packet [3 + num_responses*(6+1+num_reserved_fields+3+2) + i*1]; // rssi 4077 // for EIR packets, there is only one reponse in it 4078 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4079 name = NULL; 4080 // EIR data is 240 bytes in EIR event 4081 for (ad_iterator_init(&context, 240, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4082 uint8_t data_type = ad_iterator_get_data_type(&context); 4083 uint8_t data_size = ad_iterator_get_data_len(&context); 4084 const uint8_t * data = ad_iterator_get_data(&context); 4085 // Prefer Complete Local Name over Shortend Local Name 4086 switch (data_type){ 4087 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4088 if (name) continue; 4089 /* explicit fall-through */ 4090 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4091 name = data; 4092 name_len = data_size; 4093 break; 4094 default: 4095 break; 4096 } 4097 } 4098 if (name){ 4099 event[16] = 1; 4100 // truncate name if needed 4101 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4102 event[17] = len; 4103 memcpy(&event[18], name, len); 4104 event_size += len; 4105 } 4106 break; 4107 } 4108 event[1] = event_size - 2; 4109 hci_emit_event(event, event_size, 1); 4110 } 4111 } 4112 #endif 4113 4114 void hci_emit_state(void){ 4115 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4116 uint8_t event[3]; 4117 event[0] = BTSTACK_EVENT_STATE; 4118 event[1] = sizeof(event) - 2; 4119 event[2] = hci_stack->state; 4120 hci_emit_event(event, sizeof(event), 1); 4121 } 4122 4123 #ifdef ENABLE_CLASSIC 4124 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4125 uint8_t event[13]; 4126 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4127 event[1] = sizeof(event) - 2; 4128 event[2] = status; 4129 little_endian_store_16(event, 3, con_handle); 4130 reverse_bd_addr(address, &event[5]); 4131 event[11] = 1; // ACL connection 4132 event[12] = 0; // encryption disabled 4133 hci_emit_event(event, sizeof(event), 1); 4134 } 4135 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4136 if (disable_l2cap_timeouts) return; 4137 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4138 uint8_t event[4]; 4139 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4140 event[1] = sizeof(event) - 2; 4141 little_endian_store_16(event, 2, conn->con_handle); 4142 hci_emit_event(event, sizeof(event), 1); 4143 } 4144 #endif 4145 4146 #ifdef ENABLE_BLE 4147 #ifdef ENABLE_LE_CENTRAL 4148 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4149 uint8_t event[21]; 4150 event[0] = HCI_EVENT_LE_META; 4151 event[1] = sizeof(event) - 2; 4152 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4153 event[3] = status; 4154 little_endian_store_16(event, 4, con_handle); 4155 event[6] = 0; // TODO: role 4156 event[7] = address_type; 4157 reverse_bd_addr(address, &event[8]); 4158 little_endian_store_16(event, 14, 0); // interval 4159 little_endian_store_16(event, 16, 0); // latency 4160 little_endian_store_16(event, 18, 0); // supervision timeout 4161 event[20] = 0; // master clock accuracy 4162 hci_emit_event(event, sizeof(event), 1); 4163 } 4164 #endif 4165 #endif 4166 4167 static void hci_emit_transport_packet_sent(void){ 4168 // notify upper stack that it might be possible to send again 4169 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4170 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4171 } 4172 4173 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4174 uint8_t event[6]; 4175 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4176 event[1] = sizeof(event) - 2; 4177 event[2] = 0; // status = OK 4178 little_endian_store_16(event, 3, con_handle); 4179 event[5] = reason; 4180 hci_emit_event(event, sizeof(event), 1); 4181 } 4182 4183 static void hci_emit_nr_connections_changed(void){ 4184 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4185 uint8_t event[3]; 4186 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4187 event[1] = sizeof(event) - 2; 4188 event[2] = nr_hci_connections(); 4189 hci_emit_event(event, sizeof(event), 1); 4190 } 4191 4192 static void hci_emit_hci_open_failed(void){ 4193 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4194 uint8_t event[2]; 4195 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4196 event[1] = sizeof(event) - 2; 4197 hci_emit_event(event, sizeof(event), 1); 4198 } 4199 4200 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4201 log_info("hci_emit_dedicated_bonding_result %u ", status); 4202 uint8_t event[9]; 4203 int pos = 0; 4204 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4205 event[pos++] = sizeof(event) - 2; 4206 event[pos++] = status; 4207 reverse_bd_addr(address, &event[pos]); 4208 hci_emit_event(event, sizeof(event), 1); 4209 } 4210 4211 4212 #ifdef ENABLE_CLASSIC 4213 4214 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4215 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4216 uint8_t event[5]; 4217 int pos = 0; 4218 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4219 event[pos++] = sizeof(event) - 2; 4220 little_endian_store_16(event, 2, con_handle); 4221 pos += 2; 4222 event[pos++] = level; 4223 hci_emit_event(event, sizeof(event), 1); 4224 } 4225 4226 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4227 if (!connection) return LEVEL_0; 4228 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4229 return gap_security_level_for_link_key_type(connection->link_key_type); 4230 } 4231 4232 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4233 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4234 uint8_t event[3]; 4235 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4236 event[1] = sizeof(event) - 2; 4237 event[2] = enabled; 4238 hci_emit_event(event, sizeof(event), 1); 4239 } 4240 4241 #ifdef ENABLE_CLASSIC 4242 // query if remote side supports eSCO 4243 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4244 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4245 if (!connection) return 0; 4246 return connection->remote_supported_feature_eSCO; 4247 } 4248 4249 // query if remote side supports SSP 4250 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4251 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4252 if (!connection) return 0; 4253 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 4254 } 4255 4256 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4257 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4258 } 4259 #endif 4260 4261 // GAP API 4262 /** 4263 * @bbrief enable/disable bonding. default is enabled 4264 * @praram enabled 4265 */ 4266 void gap_set_bondable_mode(int enable){ 4267 hci_stack->bondable = enable ? 1 : 0; 4268 } 4269 /** 4270 * @brief Get bondable mode. 4271 * @return 1 if bondable 4272 */ 4273 int gap_get_bondable_mode(void){ 4274 return hci_stack->bondable; 4275 } 4276 4277 /** 4278 * @brief map link keys to security levels 4279 */ 4280 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4281 switch (link_key_type){ 4282 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4283 return LEVEL_4; 4284 case COMBINATION_KEY: 4285 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4286 return LEVEL_3; 4287 default: 4288 return LEVEL_2; 4289 } 4290 } 4291 4292 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4293 log_info("gap_mitm_protection_required_for_security_level %u", level); 4294 return level > LEVEL_2; 4295 } 4296 4297 /** 4298 * @brief get current security level 4299 */ 4300 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4301 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4302 if (!connection) return LEVEL_0; 4303 return gap_security_level_for_connection(connection); 4304 } 4305 4306 /** 4307 * @brief request connection to device to 4308 * @result GAP_AUTHENTICATION_RESULT 4309 */ 4310 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4311 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4312 if (!connection){ 4313 hci_emit_security_level(con_handle, LEVEL_0); 4314 return; 4315 } 4316 gap_security_level_t current_level = gap_security_level(con_handle); 4317 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4318 requested_level, connection->requested_security_level, current_level); 4319 4320 // assumption: earlier requested security higher than current level => security request is active 4321 if (current_level < connection->requested_security_level){ 4322 if (connection->requested_security_level < requested_level){ 4323 // increase requested level as new level is higher 4324 4325 // TODO: handle re-authentication when done 4326 4327 connection->requested_security_level = requested_level; 4328 } 4329 return; 4330 } 4331 4332 // no request active, notify if security sufficient 4333 if (requested_level <= current_level){ 4334 hci_emit_security_level(con_handle, current_level); 4335 return; 4336 } 4337 4338 // start pairing to increase security level 4339 connection->requested_security_level = requested_level; 4340 4341 #if 0 4342 // sending encryption request without a link key results in an error. 4343 // TODO: figure out how to use it properly 4344 4345 // would enabling ecnryption suffice (>= LEVEL_2)? 4346 if (hci_stack->link_key_db){ 4347 link_key_type_t link_key_type; 4348 link_key_t link_key; 4349 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4350 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4351 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4352 return; 4353 } 4354 } 4355 } 4356 #endif 4357 4358 // start to authenticate connection 4359 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4360 hci_run(); 4361 } 4362 4363 /** 4364 * @brief start dedicated bonding with device. disconnect after bonding 4365 * @param device 4366 * @param request MITM protection 4367 * @result GAP_DEDICATED_BONDING_COMPLETE 4368 */ 4369 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4370 4371 // create connection state machine 4372 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 4373 4374 if (!connection){ 4375 return BTSTACK_MEMORY_ALLOC_FAILED; 4376 } 4377 4378 // delete linkn key 4379 gap_drop_link_key_for_bd_addr(device); 4380 4381 // configure LEVEL_2/3, dedicated bonding 4382 connection->state = SEND_CREATE_CONNECTION; 4383 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4384 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4385 connection->bonding_flags = BONDING_DEDICATED; 4386 4387 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4388 4389 // handle: connnection failure (connection complete != ok) 4390 // handle: authentication failure 4391 // handle: disconnect on done 4392 4393 hci_run(); 4394 4395 return 0; 4396 } 4397 #endif 4398 4399 void gap_set_local_name(const char * local_name){ 4400 hci_stack->local_name = local_name; 4401 } 4402 4403 4404 #ifdef ENABLE_BLE 4405 4406 #ifdef ENABLE_LE_CENTRAL 4407 void gap_start_scan(void){ 4408 hci_stack->le_scanning_enabled = 1; 4409 hci_run(); 4410 } 4411 4412 void gap_stop_scan(void){ 4413 hci_stack->le_scanning_enabled = 0; 4414 hci_run(); 4415 } 4416 4417 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4418 hci_stack->le_scan_type = scan_type; 4419 hci_stack->le_scan_interval = scan_interval; 4420 hci_stack->le_scan_window = scan_window; 4421 hci_run(); 4422 } 4423 4424 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4425 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4426 if (!conn){ 4427 log_info("gap_connect: no connection exists yet, creating context"); 4428 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4429 if (!conn){ 4430 // notify client that alloc failed 4431 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4432 log_info("gap_connect: failed to alloc hci_connection_t"); 4433 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4434 } 4435 conn->state = SEND_CREATE_CONNECTION; 4436 log_info("gap_connect: send create connection next"); 4437 hci_run(); 4438 return 0; 4439 } 4440 4441 if (!hci_is_le_connection(conn) || 4442 conn->state == SEND_CREATE_CONNECTION || 4443 conn->state == SENT_CREATE_CONNECTION) { 4444 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4445 log_error("gap_connect: classic connection or connect is already being created"); 4446 return GATT_CLIENT_IN_WRONG_STATE; 4447 } 4448 4449 log_info("gap_connect: context exists with state %u", conn->state); 4450 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4451 hci_run(); 4452 return 0; 4453 } 4454 4455 // @assumption: only a single outgoing LE Connection exists 4456 static hci_connection_t * gap_get_outgoing_connection(void){ 4457 btstack_linked_item_t *it; 4458 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4459 hci_connection_t * conn = (hci_connection_t *) it; 4460 if (!hci_is_le_connection(conn)) continue; 4461 switch (conn->state){ 4462 case SEND_CREATE_CONNECTION: 4463 case SENT_CREATE_CONNECTION: 4464 case SENT_CANCEL_CONNECTION: 4465 return conn; 4466 default: 4467 break; 4468 }; 4469 } 4470 return NULL; 4471 } 4472 4473 uint8_t gap_connect_cancel(void){ 4474 hci_connection_t * conn = gap_get_outgoing_connection(); 4475 if (!conn) return 0; 4476 switch (conn->state){ 4477 case SEND_CREATE_CONNECTION: 4478 // skip sending create connection and emit event instead 4479 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4480 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4481 btstack_memory_hci_connection_free( conn ); 4482 break; 4483 case SENT_CREATE_CONNECTION: 4484 // request to send cancel connection 4485 conn->state = SEND_CANCEL_CONNECTION; 4486 hci_run(); 4487 break; 4488 default: 4489 break; 4490 } 4491 return 0; 4492 } 4493 #endif 4494 4495 #ifdef ENABLE_LE_CENTRAL 4496 /** 4497 * @brief Set connection parameters for outgoing connections 4498 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4499 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4500 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4501 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4502 * @param conn_latency, default: 4 4503 * @param supervision_timeout (unit: 10ms), default: 720 ms 4504 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4505 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4506 */ 4507 4508 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4509 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4510 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4511 hci_stack->le_connection_scan_interval = conn_scan_interval; 4512 hci_stack->le_connection_scan_window = conn_scan_window; 4513 hci_stack->le_connection_interval_min = conn_interval_min; 4514 hci_stack->le_connection_interval_max = conn_interval_max; 4515 hci_stack->le_connection_latency = conn_latency; 4516 hci_stack->le_supervision_timeout = supervision_timeout; 4517 hci_stack->le_minimum_ce_length = min_ce_length; 4518 hci_stack->le_maximum_ce_length = max_ce_length; 4519 } 4520 #endif 4521 4522 /** 4523 * @brief Updates the connection parameters for a given LE connection 4524 * @param handle 4525 * @param conn_interval_min (unit: 1.25ms) 4526 * @param conn_interval_max (unit: 1.25ms) 4527 * @param conn_latency 4528 * @param supervision_timeout (unit: 10ms) 4529 * @returns 0 if ok 4530 */ 4531 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4532 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4533 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4534 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4535 connection->le_conn_interval_min = conn_interval_min; 4536 connection->le_conn_interval_max = conn_interval_max; 4537 connection->le_conn_latency = conn_latency; 4538 connection->le_supervision_timeout = supervision_timeout; 4539 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 4540 hci_run(); 4541 return 0; 4542 } 4543 4544 /** 4545 * @brief Request an update of the connection parameter for a given LE connection 4546 * @param handle 4547 * @param conn_interval_min (unit: 1.25ms) 4548 * @param conn_interval_max (unit: 1.25ms) 4549 * @param conn_latency 4550 * @param supervision_timeout (unit: 10ms) 4551 * @returns 0 if ok 4552 */ 4553 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4554 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4555 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4556 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4557 connection->le_conn_interval_min = conn_interval_min; 4558 connection->le_conn_interval_max = conn_interval_max; 4559 connection->le_conn_latency = conn_latency; 4560 connection->le_supervision_timeout = supervision_timeout; 4561 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 4562 hci_run(); 4563 return 0; 4564 } 4565 4566 #ifdef ENABLE_LE_PERIPHERAL 4567 4568 static void gap_advertisments_changed(void){ 4569 // disable advertisements before updating adv, scan data, or adv params 4570 if (hci_stack->le_advertisements_active){ 4571 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 4572 } 4573 hci_run(); 4574 } 4575 4576 /** 4577 * @brief Set Advertisement Data 4578 * @param advertising_data_length 4579 * @param advertising_data (max 31 octets) 4580 * @note data is not copied, pointer has to stay valid 4581 */ 4582 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 4583 hci_stack->le_advertisements_data_len = advertising_data_length; 4584 hci_stack->le_advertisements_data = advertising_data; 4585 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4586 gap_advertisments_changed(); 4587 } 4588 4589 /** 4590 * @brief Set Scan Response Data 4591 * @param advertising_data_length 4592 * @param advertising_data (max 31 octets) 4593 * @note data is not copied, pointer has to stay valid 4594 */ 4595 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 4596 hci_stack->le_scan_response_data_len = scan_response_data_length; 4597 hci_stack->le_scan_response_data = scan_response_data; 4598 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4599 gap_advertisments_changed(); 4600 } 4601 4602 /** 4603 * @brief Set Advertisement Parameters 4604 * @param adv_int_min 4605 * @param adv_int_max 4606 * @param adv_type 4607 * @param direct_address_type 4608 * @param direct_address 4609 * @param channel_map 4610 * @param filter_policy 4611 * 4612 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 4613 */ 4614 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 4615 uint8_t direct_address_typ, bd_addr_t direct_address, 4616 uint8_t channel_map, uint8_t filter_policy) { 4617 4618 hci_stack->le_advertisements_interval_min = adv_int_min; 4619 hci_stack->le_advertisements_interval_max = adv_int_max; 4620 hci_stack->le_advertisements_type = adv_type; 4621 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 4622 hci_stack->le_advertisements_channel_map = channel_map; 4623 hci_stack->le_advertisements_filter_policy = filter_policy; 4624 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 4625 4626 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4627 gap_advertisments_changed(); 4628 } 4629 4630 /** 4631 * @brief Enable/Disable Advertisements 4632 * @param enabled 4633 */ 4634 void gap_advertisements_enable(int enabled){ 4635 hci_stack->le_advertisements_enabled = enabled; 4636 if (enabled && !hci_stack->le_advertisements_active){ 4637 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 4638 } 4639 if (!enabled && hci_stack->le_advertisements_active){ 4640 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 4641 } 4642 hci_run(); 4643 } 4644 4645 #endif 4646 4647 void hci_le_set_own_address_type(uint8_t own_address_type){ 4648 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 4649 if (own_address_type == hci_stack->le_own_addr_type) return; 4650 hci_stack->le_own_addr_type = own_address_type; 4651 4652 #ifdef ENABLE_LE_PERIPHERAL 4653 // update advertisement parameters, too 4654 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4655 gap_advertisments_changed(); 4656 #endif 4657 #ifdef ENABLE_LE_CENTRAL 4658 // note: we don't update scan parameters or modify ongoing connection attempts 4659 #endif 4660 } 4661 4662 #endif 4663 4664 uint8_t gap_disconnect(hci_con_handle_t handle){ 4665 hci_connection_t * conn = hci_connection_for_handle(handle); 4666 if (!conn){ 4667 hci_emit_disconnection_complete(handle, 0); 4668 return 0; 4669 } 4670 // ignore if already disconnected 4671 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4672 return 0; 4673 } 4674 conn->state = SEND_DISCONNECT; 4675 hci_run(); 4676 return 0; 4677 } 4678 4679 /** 4680 * @brief Get connection type 4681 * @param con_handle 4682 * @result connection_type 4683 */ 4684 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 4685 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4686 if (!conn) return GAP_CONNECTION_INVALID; 4687 switch (conn->address_type){ 4688 case BD_ADDR_TYPE_LE_PUBLIC: 4689 case BD_ADDR_TYPE_LE_RANDOM: 4690 return GAP_CONNECTION_LE; 4691 case BD_ADDR_TYPE_SCO: 4692 return GAP_CONNECTION_SCO; 4693 case BD_ADDR_TYPE_CLASSIC: 4694 return GAP_CONNECTION_ACL; 4695 default: 4696 return GAP_CONNECTION_INVALID; 4697 } 4698 } 4699 4700 #ifdef ENABLE_BLE 4701 4702 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){ 4703 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4704 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4705 4706 conn->le_phy_update_all_phys = all_phys; 4707 conn->le_phy_update_tx_phys = tx_phys; 4708 conn->le_phy_update_rx_phys = rx_phys; 4709 conn->le_phy_update_phy_options = phy_options; 4710 4711 hci_run(); 4712 4713 return 0; 4714 } 4715 4716 #ifdef ENABLE_LE_CENTRAL 4717 /** 4718 * @brief Auto Connection Establishment - Start Connecting to device 4719 * @param address_typ 4720 * @param address 4721 * @returns 0 if ok 4722 */ 4723 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 4724 // check capacity 4725 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 4726 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 4727 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 4728 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 4729 entry->address_type = address_type; 4730 memcpy(entry->address, address, 6); 4731 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 4732 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 4733 hci_run(); 4734 return 0; 4735 } 4736 4737 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 4738 btstack_linked_list_iterator_t it; 4739 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4740 while (btstack_linked_list_iterator_has_next(&it)){ 4741 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4742 if (entry->address_type != address_type) continue; 4743 if (memcmp(entry->address, address, 6) != 0) continue; 4744 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4745 // remove from controller if already present 4746 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4747 continue; 4748 } 4749 // direclty remove entry from whitelist 4750 btstack_linked_list_iterator_remove(&it); 4751 btstack_memory_whitelist_entry_free(entry); 4752 } 4753 } 4754 4755 /** 4756 * @brief Auto Connection Establishment - Stop Connecting to device 4757 * @param address_typ 4758 * @param address 4759 * @returns 0 if ok 4760 */ 4761 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 4762 hci_remove_from_whitelist(address_type, address); 4763 hci_run(); 4764 return 0; 4765 } 4766 4767 /** 4768 * @brief Auto Connection Establishment - Stop everything 4769 * @note Convenience function to stop all active auto connection attempts 4770 */ 4771 void gap_auto_connection_stop_all(void){ 4772 btstack_linked_list_iterator_t it; 4773 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 4774 while (btstack_linked_list_iterator_has_next(&it)){ 4775 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 4776 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 4777 // remove from controller if already present 4778 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4779 continue; 4780 } 4781 // directly remove entry from whitelist 4782 btstack_linked_list_iterator_remove(&it); 4783 btstack_memory_whitelist_entry_free(entry); 4784 } 4785 hci_run(); 4786 } 4787 4788 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 4789 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 4790 if (!conn) return 0; 4791 return conn->le_connection_interval; 4792 } 4793 #endif 4794 #endif 4795 4796 #ifdef ENABLE_CLASSIC 4797 /** 4798 * @brief Set Extended Inquiry Response data 4799 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 4800 * @note has to be done before stack starts up 4801 */ 4802 void gap_set_extended_inquiry_response(const uint8_t * data){ 4803 hci_stack->eir_data = data; 4804 } 4805 4806 /** 4807 * @brief Start GAP Classic Inquiry 4808 * @param duration in 1.28s units 4809 * @return 0 if ok 4810 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 4811 */ 4812 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 4813 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 4814 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4815 if (duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN || duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX){ 4816 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 4817 } 4818 hci_stack->inquiry_state = duration_in_1280ms_units; 4819 hci_run(); 4820 return 0; 4821 } 4822 4823 /** 4824 * @brief Stop GAP Classic Inquiry 4825 * @returns 0 if ok 4826 */ 4827 int gap_inquiry_stop(void){ 4828 if (hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN && hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX) { 4829 // emit inquiry complete event, before it even started 4830 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 4831 hci_emit_event(event, sizeof(event), 1); 4832 return 0; 4833 } 4834 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 4835 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 4836 hci_run(); 4837 return 0; 4838 } 4839 4840 4841 /** 4842 * @brief Remote Name Request 4843 * @param addr 4844 * @param page_scan_repetition_mode 4845 * @param clock_offset only used when bit 15 is set 4846 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 4847 */ 4848 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 4849 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4850 memcpy(hci_stack->remote_name_addr, addr, 6); 4851 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 4852 hci_stack->remote_name_clock_offset = clock_offset; 4853 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 4854 hci_run(); 4855 return 0; 4856 } 4857 4858 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 4859 hci_stack->gap_pairing_state = state; 4860 memcpy(hci_stack->gap_pairing_addr, addr, 6); 4861 hci_run(); 4862 return 0; 4863 } 4864 4865 /** 4866 * @brief Legacy Pairing Pin Code Response 4867 * @param addr 4868 * @param pin 4869 * @return 0 if ok 4870 */ 4871 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 4872 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4873 hci_stack->gap_pairing_input.gap_pairing_pin = pin; 4874 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 4875 } 4876 4877 /** 4878 * @brief Abort Legacy Pairing 4879 * @param addr 4880 * @param pin 4881 * @return 0 if ok 4882 */ 4883 int gap_pin_code_negative(bd_addr_t addr){ 4884 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4885 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 4886 } 4887 4888 /** 4889 * @brief SSP Passkey Response 4890 * @param addr 4891 * @param passkey 4892 * @return 0 if ok 4893 */ 4894 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 4895 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4896 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 4897 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 4898 } 4899 4900 /** 4901 * @brief Abort SSP Passkey Entry/Pairing 4902 * @param addr 4903 * @param pin 4904 * @return 0 if ok 4905 */ 4906 int gap_ssp_passkey_negative(bd_addr_t addr){ 4907 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4908 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 4909 } 4910 4911 /** 4912 * @brief Accept SSP Numeric Comparison 4913 * @param addr 4914 * @param passkey 4915 * @return 0 if ok 4916 */ 4917 int gap_ssp_confirmation_response(bd_addr_t addr){ 4918 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4919 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 4920 } 4921 4922 /** 4923 * @brief Abort SSP Numeric Comparison/Pairing 4924 * @param addr 4925 * @param pin 4926 * @return 0 if ok 4927 */ 4928 int gap_ssp_confirmation_negative(bd_addr_t addr){ 4929 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 4930 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 4931 } 4932 4933 /** 4934 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 4935 * @param inquiry_mode see bluetooth_defines.h 4936 */ 4937 void hci_set_inquiry_mode(inquiry_mode_t mode){ 4938 hci_stack->inquiry_mode = mode; 4939 } 4940 4941 /** 4942 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 4943 */ 4944 void hci_set_sco_voice_setting(uint16_t voice_setting){ 4945 hci_stack->sco_voice_setting = voice_setting; 4946 } 4947 4948 /** 4949 * @brief Get SCO Voice Setting 4950 * @return current voice setting 4951 */ 4952 uint16_t hci_get_sco_voice_setting(void){ 4953 return hci_stack->sco_voice_setting; 4954 } 4955 4956 #ifdef ENABLE_CLASSIC 4957 #ifdef ENABLE_SCO_OVER_HCI 4958 static int hci_have_usb_transport(void){ 4959 if (!hci_stack->hci_transport) return 0; 4960 const char * transport_name = hci_stack->hci_transport->name; 4961 if (!transport_name) return 0; 4962 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 4963 } 4964 #endif 4965 #endif 4966 4967 /** @brief Get SCO packet length for current SCO Voice setting 4968 * @note Using SCO packets of the exact length is required for USB transfer 4969 * @return Length of SCO packets in bytes (not audio frames) 4970 */ 4971 int hci_get_sco_packet_length(void){ 4972 int sco_packet_length = 0; 4973 4974 #ifdef ENABLE_CLASSIC 4975 #ifdef ENABLE_SCO_OVER_HCI 4976 4977 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 4978 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 4979 4980 if (hci_have_usb_transport()){ 4981 // see Core Spec for H2 USB Transfer. 4982 // 3 byte SCO header + 24 bytes per connection 4983 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 4984 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 4985 } else { 4986 // 3 byte SCO header + SCO packet size over the air (60 bytes) 4987 sco_packet_length = 3 + 60 * multiplier; 4988 // assert that it still fits inside an SCO buffer 4989 if (sco_packet_length > hci_stack->sco_data_packet_length){ 4990 sco_packet_length = 3 + 60; 4991 } 4992 } 4993 #endif 4994 #endif 4995 return sco_packet_length; 4996 } 4997 4998 /** 4999 * @brief Sets the master/slave policy 5000 * @param policy (0: attempt to become master, 1: let connecting device decide) 5001 */ 5002 void hci_set_master_slave_policy(uint8_t policy){ 5003 hci_stack->master_slave_policy = policy; 5004 } 5005 5006 #endif 5007 5008 HCI_STATE hci_get_state(void){ 5009 return hci_stack->state; 5010 } 5011 5012 5013 /** 5014 * @brief Set callback for Bluetooth Hardware Error 5015 */ 5016 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5017 hci_stack->hardware_error_callback = fn; 5018 } 5019 5020 void hci_disconnect_all(void){ 5021 btstack_linked_list_iterator_t it; 5022 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5023 while (btstack_linked_list_iterator_has_next(&it)){ 5024 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5025 if (con->state == SENT_DISCONNECT) continue; 5026 con->state = SEND_DISCONNECT; 5027 } 5028 hci_run(); 5029 } 5030 5031 uint16_t hci_get_manufacturer(void){ 5032 return hci_stack->manufacturer; 5033 } 5034 5035 #ifdef ENABLE_BLE 5036 5037 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5038 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5039 if (!hci_con) return NULL; 5040 return &hci_con->sm_connection; 5041 } 5042 5043 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5044 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5045 5046 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5047 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5048 if (!sm_conn) return 0; // wrong connection 5049 if (!sm_conn->sm_connection_encrypted) return 0; 5050 return sm_conn->sm_actual_encryption_key_size; 5051 } 5052 5053 int gap_authenticated(hci_con_handle_t con_handle){ 5054 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5055 if (!sm_conn) return 0; // wrong connection 5056 if (!sm_conn->sm_connection_encrypted) return 0; // unencrypted connection cannot be authenticated 5057 return sm_conn->sm_connection_authenticated; 5058 } 5059 5060 int gap_secure_connection(hci_con_handle_t con_handle){ 5061 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5062 if (!sm_conn) return 0; // wrong connection 5063 if (!sm_conn->sm_connection_encrypted) return 0; // unencrypted connection cannot be authenticated 5064 return sm_conn->sm_connection_sc; 5065 } 5066 5067 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5068 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5069 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5070 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5071 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5072 return sm_conn->sm_connection_authorization_state; 5073 } 5074 #endif 5075 5076 #ifdef ENABLE_CLASSIC 5077 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){ 5078 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5079 if (!conn) return GAP_CONNECTION_INVALID; 5080 conn->sniff_min_interval = sniff_min_interval; 5081 conn->sniff_max_interval = sniff_max_interval; 5082 conn->sniff_attempt = sniff_attempt; 5083 conn->sniff_timeout = sniff_timeout; 5084 hci_run(); 5085 return 0; 5086 } 5087 5088 /** 5089 * @brief Exit Sniff mode 5090 * @param con_handle 5091 @ @return 0 if ok 5092 */ 5093 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5094 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5095 if (!conn) return GAP_CONNECTION_INVALID; 5096 conn->sniff_min_interval = 0xffff; 5097 hci_run(); 5098 return 0; 5099 } 5100 #endif 5101 5102 void hci_halting_defer(void){ 5103 if (hci_stack->state != HCI_STATE_HALTING) return; 5104 switch (hci_stack->substate){ 5105 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5106 case HCI_HALTING_CLOSE: 5107 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5108 break; 5109 default: 5110 break; 5111 } 5112 } 5113